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WO2017211119A1 - Appareil intégré, système de post-traitement de gaz d'échappement et procédé de commande - Google Patents

Appareil intégré, système de post-traitement de gaz d'échappement et procédé de commande Download PDF

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Publication number
WO2017211119A1
WO2017211119A1 PCT/CN2017/079998 CN2017079998W WO2017211119A1 WO 2017211119 A1 WO2017211119 A1 WO 2017211119A1 CN 2017079998 W CN2017079998 W CN 2017079998W WO 2017211119 A1 WO2017211119 A1 WO 2017211119A1
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WO
WIPO (PCT)
Prior art keywords
nozzle
pump
integrated device
assembly
urea
Prior art date
Application number
PCT/CN2017/079998
Other languages
English (en)
Chinese (zh)
Inventor
杨振球
樊高峰
艾伯希吉特乌帕德亚
彭威波
宋红卫
陈国立
王学良
Original Assignee
天纳克（苏州）排放系统有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 天纳克（苏州）排放系统有限公司 filed Critical 天纳克（苏州）排放系统有限公司
Publication of WO2017211119A1 publication Critical patent/WO2017211119A1/fr

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
    • F01N3/20—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion
    • F01N3/206—Adding periodically or continuously substances to exhaust gases for promoting purification, e.g. catalytic material in liquid form, NOx reducing agents
    • F01N3/2066—Selective catalytic reduction [SCR]
    • F01N3/2073—Means for generating a reducing substance from the exhaust gases
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
    • F01N3/20—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
    • F01N3/20—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion
    • F01N3/206—Adding periodically or continuously substances to exhaust gases for promoting purification, e.g. catalytic material in liquid form, NOx reducing agents
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
    • F01N3/20—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion
    • F01N3/206—Adding periodically or continuously substances to exhaust gases for promoting purification, e.g. catalytic material in liquid form, NOx reducing agents
    • F01N3/208—Control of selective catalytic reduction [SCR], e.g. by adjusting the dosing of reducing agent
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES
    • F01N2610/00—Adding substances to exhaust gases
    • F01N2610/02—Adding substances to exhaust gases the substance being ammonia or urea
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES
    • F01N2610/00—Adding substances to exhaust gases
    • F01N2610/03—Adding substances to exhaust gases the substance being hydrocarbons, e.g. engine fuel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES
    • F01N2610/00—Adding substances to exhaust gases
    • F01N2610/14—Arrangements for the supply of substances, e.g. conduits
    • F01N2610/1433—Pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES
    • F01N2610/00—Adding substances to exhaust gases
    • F01N2610/14—Arrangements for the supply of substances, e.g. conduits
    • F01N2610/1433—Pumps
    • F01N2610/144—Control thereof
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES
    • F01N2610/00—Adding substances to exhaust gases
    • F01N2610/14—Arrangements for the supply of substances, e.g. conduits
    • F01N2610/1453—Sprayers or atomisers; Arrangement thereof in the exhaust apparatus
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES
    • F01N2610/00—Adding substances to exhaust gases
    • F01N2610/14—Arrangements for the supply of substances, e.g. conduits
    • F01N2610/1453—Sprayers or atomisers; Arrangement thereof in the exhaust apparatus
    • F01N2610/146—Control thereof, e.g. control of injectors or injection valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES
    • F01N2610/00—Adding substances to exhaust gases
    • F01N2610/14—Arrangements for the supply of substances, e.g. conduits
    • F01N2610/1473—Overflow or return means for the substances, e.g. conduits or valves for the return path
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES
    • F01N2610/00—Adding substances to exhaust gases
    • F01N2610/14—Arrangements for the supply of substances, e.g. conduits
    • F01N2610/1486—Means to prevent the substance from freezing
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/40—Engine management systems

Definitions

  • the invention relates to an integrated device, an exhaust gas aftertreatment system and a control method, and belongs to the technical field of engine exhaust aftertreatment.
  • the post-treatment technology commonly used in the industry is selective catalytic reduction (SCR), and the exhaust gas is installed upstream of the SCR.
  • SCR selective catalytic reduction
  • the urea solution is sprayed in.
  • the urea solution is hydrolyzed and pyrolyzed to generate ammonia gas, and chemically reacts with nitrogen oxides to reduce the concentration of harmful substances.
  • Urea injection systems currently on the market typically include air assist systems and non-air assist systems.
  • any system includes a urea tank assembly, a pump supply unit connected to the urea tank assembly through a low pressure line, a nozzle module connected to the pump supply unit through a high pressure line, and a controller.
  • the pump supply unit includes a urea pump, a pressure sensor, and the like, and the nozzle module includes a urea nozzle or the like.
  • the urea pump is spaced farther from the urea nozzle and is connected by a urea tube.
  • the existing urea injection system contains many components, and the installation is complicated and the cost is high.
  • the present invention adopts the following technical solutions:
  • the pump is for pumping a fluid medium to the nozzle, the nozzle for injecting the fluid medium into an exhaust of an engine
  • the integrated device comprising a pump assembly and a nozzle assembly
  • the pump assembly is provided with a receiving cavity at least partially receiving the nozzle assembly
  • the pump assembly includes a pump assembly housing and the pump cooperating with the pump assembly housing, the pump assembly housing including An inlet passage upstream of the pump and in communication with the pump and downstream of the pump And an outlet passage in communication with the pump, the outlet passage being in communication with the nozzle assembly
  • the pump assembly including a motor coil for driving the pump, a magnetic body interacting with the motor coil, and intermeshing a first gear assembly and a second gear assembly, the first gear assembly including a first gear shaft and a first gear, the second gear assembly including a second gear shaft and a second gear, the first gear and the a second gear meshing with each other;
  • the nozzle assembly including a nozzle assembly housing and the nozzle cooperating with the nozzle assembly housing
  • the pump is a urea pump
  • the nozzle is a urea nozzle
  • the fluid medium is a urea solution.
  • the pump is a fuel pump
  • the nozzle is a fuel nozzle
  • the fluid medium is a fuel
  • the integrated device includes a controller connected to the motor coil and the nozzle coil, and the controller independently controls the urea pump and the urea nozzle, respectively.
  • the integrated device includes a pressure sensor in communication with the outlet passage and an overflow element connected between the outlet passage and the inlet passage.
  • the pump assembly includes a metal cover for housing the magnetic body, the motor coil is sleeved on a periphery of the metal cover; the first gear shaft is a drive shaft, and the first The two gear shafts are driven shafts, and the first gear shaft is higher than the second gear shaft.
  • the pump assembly further includes an elastic body housed in the metal cover and located under the magnetic body, the elastic body being capable of being compressed to absorb the expansion caused by urea freezing. volume.
  • the pump assembly housing is provided with a gear slot for receiving the first gear and the second gear, and the first gear is externally meshed with the second gear, the gear One side of the groove is provided with a liquid inlet chamber communicating with the inlet passage, and the other side of the gear groove is provided with an outlet chamber communicating with the outlet passage.
  • the spring acts between the magnetic portion and the valve needle portion
  • the nozzle assembly further includes a valve seat that cooperates with the valve needle portion, and the nozzle coil is located at the In the periphery of the magnetic portion, the valve needle portion is provided with a valve needle, and the valve seat is provided with an injection hole that cooperates with the valve needle.
  • the valve seat includes a swirling fin welded on the nozzle assembly housing, the injection hole is disposed on the swirling sheet, and the swirling fin is further provided with The swirl holes are connected by the injection holes.
  • the integrated device is provided with a cooling assembly for cooling the urea nozzle, and the cooling assembly cools the urea nozzle by a cooling medium.
  • the pump assembly housing includes a first housing, a second housing under the first housing, and a third housing under the second housing.
  • the third housing includes a body portion and a protrusion extending downward from the body portion;
  • the nozzle assembly housing includes a body portion and an extension portion extending downward from the body portion, the body portion being provided And a receiving cavity for receiving the urea nozzle and a groove for receiving the convex portion, the receiving cavity extending downward into the extending portion.
  • the extending portion is provided with a collecting chamber communicating with the receiving cavity, wherein a portion of the magnetic portion protruding from the second housing is received in the receiving cavity.
  • the valve needle portion is provided with a tapered portion and a valve needle extending downward from the tapered portion, the valve needle extending into the collecting chamber, the magnetic portion Providing a first communication hole communicating with the accommodating cavity, the valve needle portion being provided with a second communication hole communicating with the first communication hole, the tapered portion being provided with the second communication hole and a third communication hole in which the collecting chamber communicates.
  • the upper end of the magnetic portion is sleeved with a fourth sealing ring to seal with the inner wall of the receiving cavity, and the lower end of the magnetic portion is sleeved with a fifth sealing ring to The inner wall of the receiving chamber is sealed.
  • the main body portion is provided with a cylindrical portion that protrudes upward into the accommodating cavity, and the cylindrical portion supports the tapered portion upward to make the valve needle portion
  • the nozzle coil can form more overlap in the moving direction of the valve needle.
  • the first housing includes a first upper surface, a first lower surface, and a first side, wherein the first upper surface is provided with a first annular groove, and the first ring a first island portion surrounded by the groove and a first sealing ring received in the first annular groove; the first island portion is provided with a first positioning hole penetrating the first upper surface and the first lower surface And a second positioning hole extending through the first lower surface, the urea pump includes a first sleeve received in the first positioning hole and a second sleeve received in the second positioning hole, wherein The first gear shaft is inserted into the first bushing, and the second gear shaft is inserted into the second bushing.
  • the first lower surface is provided to communicate with the first positioning hole and the second positioning The first relief groove of the hole.
  • the first island portion further includes a first guiding groove extending through the first upper surface and communicating with the second positioning hole, and the first upper surface and the inlet a first connecting hole communicating with the passage;
  • the first housing is provided with a second connecting hole penetrating the first lower surface and communicating with the liquid inlet chamber, and penetrating the first lower surface and the liquid discharging An exit hole that communicates with the cavity.
  • the first housing is provided with an overflow element receiving groove communicating with the outlet hole
  • the integrated device is provided with an overflow element installed in the receiving element receiving groove
  • the second housing includes a second upper surface and a second lower surface, and the gear groove extends through the second upper surface and the second lower surface.
  • the body portion is provided with a third upper surface
  • the third upper surface is provided with a third annular groove and a third island portion surrounded by the third annular groove
  • the The three island portion is provided with a third positioning hole penetrating the third upper surface and a fourth positioning hole, and the third positioning hole and the fourth positioning hole extend into the convex portion;
  • the urea pump includes a third bushing received in the third positioning hole and a fourth bushing received in the fourth positioning hole, wherein the first gear shaft is inserted into the third bushing, the second A gear shaft is inserted into the fourth bushing.
  • the third island portion is provided with a second guiding groove and a third guiding groove extending through the third upper surface, wherein the second guiding groove and the third The positioning holes are in communication, and the third guiding grooves are in communication with the fourth positioning holes.
  • the nozzle assembly housing is provided with a first cooling passage, a second cooling passage spaced apart from the first cooling passage, and an end cover sealed at a periphery of the extension portion,
  • the nozzle assembly housing forms an annular cooling groove connecting the first cooling passage and the second cooling passage between the end cover and the extending portion, and the first cooling passage is connected with the inlet joint for supplying
  • An engine coolant injection is provided, the second cooling passage being coupled to the outlet joint for engine coolant to flow out.
  • An exhaust aftertreatment system includes an exhaust aftertreatment exhaust system and an exhaust aftertreatment packaging system, wherein the injection system includes the aforementioned integrated device, the package system including a carrier downstream of the integrated device.
  • a control method of an integrated device comprising:
  • the fluid medium is delivered to the nozzle through the outlet passage;
  • the motor coil and the nozzle coil are independently controlled.
  • the integrated device of the pump and the nozzle of the invention integrates the pump and the nozzle well, and has a simple and compact structure, which greatly facilitates the installation of the customer.
  • the motor coil and the nozzle coil by independently controlling the motor coil and the nozzle coil, mutual interference between the pump and the nozzle is avoided, and the accuracy of the control is improved.
  • the amount of urea injected into the exhaust gas can be appropriately proportioned with the nitrogen oxides, thereby reducing the excessive injection of urea. Risk of crystallization.
  • by providing a spacer for adjusting a gap between the magnetic portion and the needle portion it is possible to precisely control the stroke of the needle portion to improve the accuracy of the urea nozzle.
  • FIG. 1 is a schematic diagram of the exhaust gas aftertreatment system of the present invention applied to the treatment of engine exhaust.
  • Figure 2 is a schematic diagram of the integrated device of Figure 1.
  • FIG. 3 is a perspective view of an integrated device of the present invention in an embodiment.
  • Figure 4 is a perspective view of another angle of Figure 3.
  • Figure 5 is a perspective view of another angle of Figure 3.
  • Figure 6 is a front elevational view of Figure 3.
  • Figure 7 is a right side view of Figure 3.
  • Fig. 8 is a bottom view of Fig. 5;
  • Figure 9 is a plan view of Figure 5.
  • Figure 10 is a partial perspective exploded view of the integrated device of the present invention with the pump assembly separated from the nozzle assembly.
  • Figure 11 is a partially exploded perspective view of the pump assembly of Figure 10 with the housing, motor coil and venting cover separated.
  • Figure 12 is a perspective view of the housing of Figure 11 assembled with the motor coil.
  • Figure 13 is an exploded perspective view of Figure 12 .
  • Figure 14 is a further exploded perspective view of Figure 11 with the control panel separated.
  • Figure 15 is an exploded perspective view showing the cover of Figure 14 and the control panel removed, wherein the connector assembly is separated.
  • Figure 16 is a perspective view of the connecting plate assembly of Figure 15.
  • Figure 17 is an exploded perspective view of the connecting plate assembly of Figure 15.
  • Figure 18 is a further exploded perspective view of Figure 15 with the magnetic body, elastomer and screws separated.
  • Figure 19 is a further exploded perspective view of Figure 18 with the first seal ring, temperature sensor and pressure sensor separated.
  • Fig. 20 is an exploded perspective view showing the magnetic body, the elastic body, the screw, and the like in Fig. 19;
  • Figure 21 is a schematic cross-sectional view of Figure 20 taken along an angle after assembly.
  • Figure 22 is a perspective view of the pressure sensor of Figure 19.
  • Figure 23 is a perspective view of another angle of Figure 22.
  • Figure 24 is an exploded perspective view of Figure 22 .
  • Figure 25 is a cross-sectional view taken along line C-C of Figure 22.
  • Fig. 26 is a partially exploded perspective view showing the first seal ring, the temperature sensor, the pressure sensor, and the like in Fig. 19, wherein the first casing is separated.
  • Figure 27 is an exploded perspective view of the first housing of Figure 26.
  • Figure 28 is an exploded perspective view of Figure 27 at another angle.
  • Figure 29 is a perspective view of a portion of the first housing of Figure 27.
  • Figure 30 is a perspective view of Figure 29 at another angle.
  • Figure 31 is a plan view of Figure 30.
  • Figure 32 is a cross-sectional view taken along line D-D of Figure 31.
  • Figure 33 is a schematic cross-sectional view taken along line E-E of Figure 31.
  • Figure 34 is a cross-sectional view taken along line F-F of Figure 31.
  • Figure 35 is a plan view of Figure 29.
  • Figure 36 is a schematic cross-sectional view taken along line G-G of Figure 35.
  • Figure 37 is a cross-sectional view taken along line H-H of Figure 35.
  • Figure 38 is a cross-sectional view taken along line I-I of Figure 35.
  • Figure 39 is a perspective view of the first housing of Figure 26 removed.
  • Figure 40 is a partial exploded perspective view of Figure 39 with the first gear assembly and the second gear assembly separated.
  • FIG. 41 is a plan view of FIG. 39.
  • FIG. 42 is an exploded perspective view of the first gear assembly and the second gear assembly of FIG. 40 after removal.
  • Figure 43 is a perspective view of the second housing of Figure 42.
  • Figure 44 is a perspective view showing another angle of Figure 43.
  • Figure 45 is a perspective view of the third housing assembly of Figure 42.
  • Figure 46 is a plan view of Figure 45.
  • Figure 47 is a cross-sectional view taken along line J-J of Figure 46.
  • Figure 48 is a schematic cross-sectional view taken along line K-K of Figure 46.
  • Figure 49 is a partially exploded perspective view of the nozzle assembly of the present invention.
  • Figure 50 is a partially exploded perspective view of the urea nozzle of Figure 49.
  • Figure 51 is a perspective view of the nozzle assembly housing of Figure 49.
  • Figure 52 is a partially exploded perspective view of Figure 51.
  • Figure 53 is a top plan view of a portion of the nozzle assembly housing of Figure 52.
  • Figure 54 is a schematic cross-sectional view taken along line L-L of Figure 53.
  • Figure 55 is a schematic cross-sectional view taken along line M-M of Figure 54.
  • Figure 56 is a schematic cross-sectional view taken along line N-N of Figure 54.
  • Figure 57 is a perspective view of another angle of Figure 53.
  • Figure 58 is an exploded perspective view of the integrated device of the present invention.
  • Figure 59 is a schematic cross-sectional view taken along line A-A of Figure 9.
  • Figure 60 is a schematic cross-sectional view taken along line O-O of Figure 59.
  • Figure 61 is a schematic cross-sectional view taken along line P-P of Figure 59.
  • Figure 62 is a cross-sectional view taken along line Q-Q of Figure 60.
  • Figure 63 is a schematic cross-sectional view taken along line R-R of Figure 61.
  • Figure 64 is a cross-sectional view taken along line B-B of Figure 9.
  • Figure 65 is a schematic cross-sectional view taken along line S-S of Figure 64.
  • the present invention discloses an exhaust aftertreatment system 100 that can be applied to treat exhaust gas from engine 10 to reduce emissions of hazardous materials to meet emission regulations.
  • the exhaust aftertreatment system 100 includes an exhaust aftertreatment injection system 200 and an exhaust aftertreatment packaging system 300, wherein the injection system 200 includes means for pumping urea solution from the urea tank 201 (as indicated by arrow X) and An integrated device 1 that injects urea solution into the exhaust of the engine 10 (eg, into the exhaust pipe 106 or within the packaging system 300); the packaging system 300 includes a mixer 301 located downstream of the integrated device 1 and located at the The carrier 302 downstream of the mixer 301 is described. Of course, in some embodiments, the mixer may not be provided, or two or more mixers may be provided.
  • the carrier 302 can be, for example, a selective catalytic reduction (SCR) or the like.
  • the engine 10 has an engine coolant circulation circuit.
  • the engine coolant circulation circuit includes a first circulation circuit 101 (shown by a thick arrow Y) and a second circulation circuit 102 (refer to a thin arrow Z).
  • the first circulation loop 101 is configured to cool the integrated device 1 to reduce its risk of being burned out by a high temperature engine exhaust; the second circulation loop 102 is used to heat the urea tank 201, To achieve the heating and defrosting function.
  • the integrated device 1 in the first circulation loop 101, is provided with an inlet joint 103 for the engine coolant to flow in and an outlet joint 104 for the engine coolant to flow out; in the second circulation loop 102, it is provided There is a control valve 105 to open or close the control valve 105 under suitable conditions to effect control of the second circulation loop 102.
  • the urea tank 201 is provided with a heating rod 202 connected to the second circulation loop 102 to heat and thaw the urea solution by using the temperature of the engine coolant.
  • the integrated device 1 of the present invention will be described in detail below.
  • the integrated device 1 of the present invention integrates the functions of the urea pump 11 and the urea nozzle 12.
  • the urea pump 11 includes, but is not limited to, a gear pump, a diaphragm pump, a plunger pump, a vane pump, and the like. It should be understood that the term "integrated" as used herein means that the urea pump 11 and the urea nozzle 12 can be mounted as a single unit on the exhaust pipe; or the urea pump 11 and the urea nozzle 12 are close to each other and pass through a shorter one.
  • the connecting pipe is connected and can be regarded as a device as a whole.
  • the exhaust gas post-treatment system 100 of the present invention is further provided with a controller 13.
  • the controller 13 may be integrated with or separate from the integrated device 1. Referring to FIG. 2, in the illustrated embodiment of the present invention, the controller 13 is integrated in the integrated device 1 to achieve high integration of parts and improve installation convenience of the client.
  • the integrated device 1 is provided with a housing 14 for accommodating the urea pump 11 and the urea nozzle 12.
  • the implementation shown in Figure 2 The manner is only a rough display of the housing 14.
  • the housing 14 is shared by the urea pump 11 and the urea nozzle 12; in another embodiment, the housing 14 is divided into a first housing that mates with the urea pump 11. And a second housing that cooperates with the urea nozzle 12, the first housing and the second housing being assembled together to form a unitary body.
  • the housing 14 is provided with an inlet passage 15 connected between the urea tank 201 and the urea pump 11, and an outlet passage 16 connected between the urea pump 11 and the urea nozzle 12.
  • inlet in the "inlet passage 15" and “outlet” in the “outlet passage 16" are referenced by the urea pump 11, that is, the upstream of the urea pump 11 is the inlet, and the urea pump 11 The downstream is the exit.
  • the outlet passage 16 is in communication with the urea nozzle 12 to pump a urea solution to the urea nozzle 12. It can be understood that the inlet passage 15 is located upstream of the urea pump 11 and is a low pressure passage; the outlet passage 16 is located downstream of the urea pump 11 and is a high pressure passage.
  • the integrated device 1 is provided with a temperature sensor 171 for detecting temperature.
  • the temperature sensor 171 may be disposed to communicate with the inlet passage 15 and/or the outlet passage 16; or the temperature sensor 171 may be disposed to be mounted at any position of the integrated device 1.
  • the signal detected by the temperature sensor 171 is transmitted to the controller 13, and the control algorithm designed by the controller 13 based on the input signal and other signals can improve the injection accuracy of the urea nozzle 12.
  • the integrated device 1 is also provided with a pressure sensor 172 for detecting pressure, the pressure sensor 172 being in communication with the outlet passage 16 to detect the pressure in the high pressure passage of the outlet of the urea pump 11.
  • the distance of the internal passage is relatively short, so that the position of the pressure sensor 172 can be considered to be relatively close to the urea nozzle 12.
  • An advantage of this design is that the pressure measured by the pressure sensor 172 is relatively close to the pressure in the urea nozzle 12, improving the accuracy of the data, thereby increasing the injection accuracy of the urea nozzle 12.
  • the integrated device 1 is further provided with an overflow element 173 connected between the outlet passage 16 and the inlet passage 15.
  • the overflow element 173 includes, but is not limited to, a relief valve, a safety valve, or an electrically controlled valve or the like.
  • the function of the overflow element 173 is to open the overflow element 173 when the pressure in the high pressure passage is higher than the set value, to release the urea solution located in the high pressure passage into the low pressure passage or directly return to the In the urea tank 201, pressure regulation is achieved.
  • the urea pump 11 In order to drive the urea pump 11, the urea pump 11 is provided with a motor coil 111 that communicates with the controller 13. In order to drive the urea nozzle 12, the urea nozzle 12 is provided with a nozzle coil 121 that communicates with the controller 13.
  • the controller 13 communicates with the temperature sensor 171 and the pressure sensor 172 to transmit a temperature signal and a pressure signal to the controller 13.
  • the controller 13 can also receive other signals, such as signals from the CAN bus that are related to engine operating parameters.
  • the controller 13 can also obtain The rotational speed of the urea pump 11 is obtained, of course, the acquisition of the rotational speed signal can be achieved by means of a corresponding rotational speed sensor 175 (hardware) or by a control algorithm (software).
  • the controller 13 independently controls the urea pump 11 and the urea nozzle 12. The advantage of such control is that the effect of the action of the urea pump 11 on the urea nozzle 12 can be reduced to achieve a relatively high control accuracy.
  • the integrated device 1 is also provided with a cooling assembly for this purpose, which cools the urea nozzle 12 by means of a cooling medium.
  • the cooling medium includes, but is not limited to, air, and/or engine coolant, and/or lubricating oil, and/or urea, and the like.
  • the illustrated embodiment of the present invention uses water cooling, i.e., cooling the urea nozzle 12 with engine coolant.
  • a cooling passage 141 for circulating the engine coolant is provided in the housing 14.
  • the main working principle of the integrated device 1 is as follows:
  • the controller 13 drives the urea pump 11 to operate.
  • the urea solution in the urea tank 201 is sucked into the urea pump 11 through the inlet passage 15, and after being pressurized, is sent to the urea nozzle 12 through the outlet passage 16.
  • the controller 13 collects and/or calculates required signals such as temperature, pressure, pump speed, and the like.
  • the controller 13 sends a control signal to the urea nozzle 12, such as energizing the nozzle coil 121, and by controlling the movement of the valve needle to effect urea injection.
  • the controller 13 sends a control signal to the urea pump 11 to control its rotational speed, thereby stabilizing the pressure of the system.
  • the controller 13 independently controls the urea pump 11 and the urea nozzle 12.
  • the integrated device 1 includes a pump assembly 18, a nozzle assembly 19, and a controller 13.
  • the nozzle assembly 19 is at least partially inserted into the pump assembly 18 and assembled together by a plurality of mounting bolts 64.
  • the pump assembly 18 includes a pump assembly housing 180 and a urea pump 11 that mates with the pump assembly housing 180.
  • the pump assembly housing 180 includes a housing 2 at the top and a first housing 3, a second housing 4, and a third housing 5 that are stacked below the housing 2.
  • the first housing 3, the second housing 4, and the third housing 5 are each made of a metal material.
  • the casing 2 includes a casing cavity 21 for covering the controller 13 and at least a portion of the pump assembly 18, and a through hole 22 communicating with the casing cavity 21.
  • the controller 13 is mounted with a chip and other electronic components, which are in operation The heat may be generated, causing the air around it to expand.
  • the present invention solves the problem of crushing the chip and/or the electronic component due to air expansion by providing the waterproof and permeable cover 24, and also functions as a waterproof.
  • the waterproof venting cover 24 can improve the environment in which the controller 13 is placed to enable it to meet operating conditions.
  • the casing 2 is made of a metal material having a better heat dissipation effect.
  • the cover 2 may also be provided with a plurality of fins (not shown) on the outside to enhance the heat dissipation effect.
  • the controller 13 includes a control board 131 and a cable plug 132 soldered to the control board 131.
  • the cable plug 132 passes through the casing 2 to be exposed to the outside for connection to an external circuit.
  • the control panel 131 is annular and is provided with a central aperture 135 in the middle.
  • the pump assembly 18 is also provided with a plurality of support posts 631 mounted on the first housing 3 and for supporting the control panel 131.
  • the pump assembly housing 180 is further provided with a connecting plate assembly 6 between the casing 2 and the first casing 3.
  • the connecting plate assembly 6 is provided with a plate portion 61 and a metal cover 62 fixed to the plate portion 61 and convex upward.
  • the metal cover 62 passes upward through the center hole 135 of the control board 131.
  • the control board 131 is sandwiched by the support post 631 and the cover 2 and forms a gap with the connecting plate assembly 6 to facilitate the control panel 131 to perform more. Good heat dissipation and better avoid interference.
  • the plate portion 61 is provided with a through hole 614, a first threading hole 618, and a through hole 615 extending through the upper and lower surfaces thereof.
  • the pressure sensor 172 at least partially passes through the through hole 614
  • the temperature sensor 171 at least partially passes through the through hole 615.
  • the conductive line 1721 of the pressure sensor 172 passes through the through hole 614
  • the conductive line 124 of the nozzle assembly 19 passes through the first threading hole 618
  • the conductive line 1711 of the temperature sensor 171 passes through the through hole 615, and is electrically connected to the control.
  • On the board 131 In addition, referring to FIG.
  • the plate portion 61 is provided with a plurality of mounting holes 611 through which the screws 133 pass.
  • the plate portion 61 is provided with a through hole 617 corresponding to the metal cover 62.
  • the lower end of the metal cover 62 is welded to the inner wall of the perforation 617.
  • the urea pump 11 is a gear pump including a motor coil 111, the metal cover 62, an elastic body 71 located in the metal cover 62, and a magnetic body 72.
  • the motor coil 111 is provided with a bracket 112 and a coil 113 wound around the bracket 112.
  • the bracket 112 is provided with a hole 114 for receiving the metal cover 62.
  • Illustrated embodiment of the invention The motor coil 111 is interference fit in the casing cavity 21, so that the motor coil 111 and the casing cavity 21 can be assembled without using additional fixing elements (such as screws or the like). Form a whole, thus reducing the number of parts.
  • the urea pump 11 further includes an outer sleeve 723 that houses the magnetic body 72. The outer sleeve 723 is directly received in the metal cover 62.
  • the motor coil 111 is sleeved on the periphery of the metal cover 62.
  • the sheet portion 61 presses down the first seal ring 73 to effect sealing.
  • the elastic body 71 is located at the lower end of the magnetic body 72, and the elastic body 71 and the magnetic body 72 are supported by a metal skeleton 720, for example, the magnetic body 72 and the elastic body 71 are respectively sleeved on the metal skeleton.
  • the metal skeleton 720 is provided with a partitioning plate 721 between the elastic body 71 and the magnetic body 72.
  • the metal skeleton 720 has a hollow cylindrical shape as a whole, and the first gear assembly 74 is at least partially housed in the metal skeleton 720 (refer to FIG. 59).
  • the end of the metal skeleton 720 is provided with a hook portion 724 that is pressed against the elastic body 71.
  • the hook portion 724 is provided with a guiding cone surface 725 that is easy to sleeve the elastic body 71 onto the metal frame 720.
  • the elastic body 71 is provided with a radially extending fitting hole 711.
  • the metal frame 720 is provided with a fixing hole 726 corresponding to the mounting hole 711.
  • the upper end of the first gear assembly 74 is mounted on the mounting hole 711 and the fixing hole.
  • the screw 722 in 726 is radially fixed to the metal skeleton 720.
  • the pressure sensor 172 includes a substrate 176, a circuit board 177 fixed on the substrate 176, and a conductive connection connected to the circuit board 177.
  • the substrate 176 is provided with a plate body portion 1761 and a protrusion portion 1762 extending downward from the plate body portion 1761.
  • a sealing ring 1722 is mounted on the protrusion portion 1762.
  • the protruding portion 1762 is provided with a through hole 1763 penetrating downward, and the through hole 1763 penetrates the plate body portion 1761 and the circuit board 177 upward.
  • the circuit board 177 is provided with a chip 1771 at a position corresponding to the through hole 1763.
  • the protective cover 178 is mounted on the periphery of the chip 1771 to protect the chip 1771.
  • the protective cover 178 has a rectangular parallelepiped shape, and the protective cover 178 is provided with a hole 1781 communicating with the chip 1771.
  • the pressure sensor 172 of the present invention does not have a separate package housing, but subtly borrows the cover 2 as its package housing. With this arrangement, the volume can be reduced, the installation can be facilitated, the cost can be reduced, and the like.
  • the pressure sensor 172 is A differential pressure sensor that is converted into an electrical signal by a differential pressure change at the upper and lower ends of the chip 1771.
  • the working principle of the differential pressure sensor which is well known to those skilled in the art, no further details are provided herein.
  • the first housing 3, the second housing 4, and the third housing 5 are machined parts, and are bolted by the upper part. And the bottom is fixed together.
  • the first housing 3 includes a first upper surface 31, a first lower surface 32, and a first side surface 33, wherein the first upper surface 31 is provided with a first annular groove 311 and surrounded by the first annular groove 311 The first island portion 312.
  • the first annular groove 311 is configured to receive the first sealing ring 73.
  • the first lower surface 32 is provided with a second annular groove 325 and a second island portion 326 surrounded by the second annular groove 325.
  • the second annular groove 325 is for receiving the second sealing ring 731 (as shown in FIG. 64).
  • the first island portion 312 is provided with a first positioning hole 3121 extending through the first upper surface 31 and the first lower surface 32, and a second positioning hole 3122 extending through the first lower surface 32. a first upper surface 31 and a first connection hole 3123 communicating with the inlet passage 15 and a first guide groove 3124 penetrating the first upper surface 31 and communicating with the second positioning hole 3122.
  • the urea pump 11 is provided with a first sleeve 76 housed in the first positioning hole 3121 and a second received in the second positioning hole 3122. Bushing 77.
  • the first housing 3 further includes an internally threaded hole 317 corresponding to the screw 133.
  • the first housing 3 further includes a plurality of first assembly holes 318 through which the bolts 66 pass, the first assembly holes 318 extending through the first upper surface 31 and the first lower surface 32.
  • the first upper surface 31 further includes a pressure sensor receiving hole 313 located at a side of the first island portion 312 for receiving the pressure sensor 172 and a temperature sensor receiving hole 314 for receiving the temperature sensor 171. Referring to FIG. 59, the seal ring 1722 on the pressure sensor 172 and the inner wall of the pressure sensor receiving hole 313 are sealed. The pressure sensor 172 is pressed by the sheet portion 61 to achieve fixation.
  • first housing 3 is further provided with an outwardly protruding mounting flange 315, and the mounting flange 315 is provided with a second mounting hole 316 corresponding to the first mounting hole 23.
  • the bolts 63 are sequentially passed through the second mounting holes 316 and the support posts 631 and fastened in the internal threads of the first mounting holes 23.
  • the first casing 3 is provided with a liquid inlet passage 332 extending through the first side surface 33 to be connected to the urea joint 331.
  • the first housing 3 is provided with a second connection hole 3127 that penetrates the first lower surface 32 and communicates with the liquid inlet passage 332.
  • the first connection hole 3123 and the second connection hole 3127 are both perpendicular to the liquid inlet channel 332.
  • the first positioning hole 3121, the second positioning hole 3122, and the second connection hole 3127 each penetrate the second island portion 326 downward.
  • the second island portion 326 is also provided with a penetrating portion An exit aperture 3126 of the first lower surface 32 is described.
  • the first lower surface 32 is provided with a first relief groove 321 that communicates with the first positioning hole 3121 and the second positioning hole 3122 to ensure pressure balance.
  • the first relief groove 321 is located on the second island portion 326.
  • the first housing 3 is further provided with a receiving cavity 322 extending downwardly through the first lower surface 32 for receiving at least a portion of the nozzle assembly 19. Referring to FIGS. 33, 34, and 36, the receiving chamber 322 is in communication with the pressure sensor receiving hole 313. At the same time, the receiving cavity 322 is also in communication with the outlet hole 3126.
  • the exit aperture 3126 is sloped inside the first housing 3 and is generally inverted V-shaped.
  • the first housing 3 is provided with a second threading hole 323 corresponding to the first threading hole 618.
  • the first casing 3 is further provided with an overflow element receiving groove 319 which communicates with the liquid inlet passage 332 and the receiving cavity 322.
  • the overflow element receiving groove 319 extends outward through the first side surface 33 to receive the overflow element 173.
  • the overflow element 173 is a safety valve in the illustrated embodiment of the invention, the purpose of which is to ensure that the pressure in the high pressure passage in the integrated device 1 is within a safe range by means of pressure relief.
  • the first housing 3 is provided with a plug 5122 that fixes the overflow element 173. Referring to FIG.
  • the overflow element 173 is provided with a choke hole 1731 that constantly communicates the inlet passage 15 and the outlet passage 16. In this way, on the one hand, the pressure fluctuations of the system can be reduced, in particular when the nozzle assembly 19 is spraying urea; on the other hand, the urea solution can be kept flowing, thereby facilitating heat dissipation of the motor coil 111 and the like.
  • the urea joint 331 is in communication with the urea tank 201 through a urea connection pipe 333.
  • the exhaust gas aftertreatment system 100 may further be provided with a heating device 334 that heats the urea connection pipe 333.
  • the liquid inlet passage 332 extends horizontally into the interior of the first casing 3.
  • the liquid inlet channel 332 can also be at an angle.
  • the first gear assembly 74 includes a first gear shaft 741 and a first gear 742 fixed to the first gear shaft 741; the second gear assembly 75 includes a second gear shaft. 751 and a second gear 752 fixed to the second gear shaft 751, the first gear 742 and the second gear 752 mesh with each other.
  • the first gear 742 is externally meshed with the second gear 752.
  • the first gear shaft 741 is a drive shaft
  • the second gear shaft 751 is a driven shaft
  • the first gear shaft 741 is higher than the second gear shaft 751.
  • the upper end of the first gear shaft 741 passes through the first sleeve 76 and is at least partially fixed in the metal frame 720.
  • the upper end of the second gear shaft 751 is positioned in the second boss 77.
  • the second housing 4 is located below the first housing 3 and is connected to the first housing 3 .
  • a plurality of positioning pins 328 are further disposed between the first housing 3 and the second housing 4.
  • the second housing 4 includes a second upper surface 41 , a second lower surface 42 , and a second upper surface 41 and a second lower surface 42 for receiving the first gear 742 and the second gear 752 .
  • One side of the gear groove 43 is provided with an inlet chamber 431 communicating with the inlet passage 15, and the other side of the gear groove 43 is provided with an outlet chamber 432 communicating with the outlet passage 16.
  • the inlet chamber 431 is in communication with the second connection hole 3127, and the upper end of the outlet chamber 432 is in communication with the outlet port 3126.
  • the second upper surface 41 of the second housing 4 is provided with a first receiving hole 411 through which the nozzle assembly 19 passes, and the second lower surface 42 is provided with a second receiving hole 421 for positioning the nozzle assembly 19.
  • the second receiving hole 421 is larger than the first receiving hole 411 to form a stepped hole.
  • the nozzle assembly 19 protrudes upward from the second upper surface 41 and is received in the receiving cavity 322. With this arrangement, a high pressure urea solution can be delivered to the urea nozzle 12.
  • the second upper surface 41 is further provided with a third threading hole 412 corresponding to the second threading hole 323.
  • the first threading hole 618, the second threading hole 323, and the third threading hole 412 are aligned with each other for the conductive wire 124 of the nozzle assembly 19 to pass through.
  • the second housing 4 further includes a plurality of second assembly holes 418 aligned with the first assembly apertures 318.
  • the third casing 5 is located below the second casing 4 and is connected to the second casing 4 .
  • the third housing 5 includes a body portion 51, a boss portion 52 extending downward from the body portion 51, and a flange 53 extending outward from the body portion 51, wherein the flange 53 is provided with the A plurality of third assembly holes 531 are aligned with the second assembly holes 418 for the bolts 66 to pass through.
  • the body portion 51 is provided with a third upper surface 511, and the third upper surface 511 is provided with a third annular groove 512 and a third island portion 513 surrounded by the third annular groove 512.
  • the third annular groove 512 is for receiving the third sealing ring 732 (as shown in FIG. 64).
  • the third island portion 513 is provided with a third positioning hole 5111 penetrating the third upper surface 511 and a fourth positioning hole 5112 penetrating the third upper surface 511.
  • the third housing 5 is provided with a third sleeve 78 received in the third positioning hole 5111 and a fourth sleeve 79 received in the fourth positioning hole 5112 .
  • the lower end of the first gear shaft 741 is positioned in the third bushing 78, and the lower end of the second gear shaft 751 is positioned in the fourth bushing 79.
  • the third island portion 513 is further provided with a second guiding groove 5114 and a third guiding groove 5115 on the third upper surface 511, wherein the second guiding groove 5114 and the third positioning hole 5111 In communication, the third guiding groove 5115 is in communication with the fourth positioning hole 5112.
  • the second guiding groove 5114 and the third guiding groove 5115 are obliquely disposed inside the third housing 5.
  • the lower end of the liquid discharge chamber 432 is in communication with both the second flow guiding groove 5114 and the third flow guiding groove 5115.
  • the urea solution enters the inlet channel 332 from the urea connection tube 333, a portion of the urea solution enters the metal cover 62 from the first connection hole 3123, and another portion of the urea solution enters the inlet chamber 431 from the second connection hole 3127; Located in the metal cover The urea solution in 62 will directly penetrate into the first positioning hole 3121 to lubricate the first sleeve 76, and on the other hand will penetrate into the second positioning hole 3122 along the first guiding groove 3124 to lubricate the second sleeve 77. .
  • the urea solution entering the liquid inlet chamber 431 is further divided into two paths, one of which enters the outlet passage 16 after being pressurized by the gear pump, and the other of which enters the third and fourth portions from the second and third flow guiding grooves 5114 and 5115, respectively.
  • the positioning holes 5111, 5112 are used to lubricate the third and fourth sleeves 78, 79 to improve the smoothness of the rotation of the gear pump and reduce wear.
  • the high pressure urea solution entering the outlet passage 16 enters the containment chamber 322 along the outlet port 3126 to flow to the nozzle assembly 19 while a portion of the urea solution flows to the overflow member 173.
  • the overflow element 173 When the pressure is less than the set value of the overflow element 173, the overflow element 173 is closed, communicating only through the choke hole 1731; and when the pressure is greater than the set value of the overflow element 173, the overflow element 173 is opened, part of the urea The solution enters the inlet passage 332 to achieve pressure relief.
  • the inlet passage 15 includes a feed passage 332, a second connection port 3127, and an inlet chamber 431. Since the inlet passage 15 is located upstream of the urea pump 11, it is called a low pressure passage.
  • the outlet passage 16 includes a liquid outlet chamber 432, an outlet hole 3126, a receiving chamber 322, and the like. Since the outlet passage 16 is located downstream of the urea pump 11, it is referred to as a high pressure passage.
  • the nozzle assembly 19 includes a nozzle assembly housing 190 and a urea nozzle 12 that mates with the nozzle assembly housing 190.
  • the nozzle assembly housing 190 includes a main body portion 91, an extending portion 92 extending downward from the main body portion 91, and a mounting flange 93 extending outward from the main body portion 91.
  • the mounting flange 93 is provided with a plurality of mounting holes 931 for mounting the integrated device 1 to the exhaust pipe 106 or the packaging system 300.
  • the main body portion 91 is provided with a fourth upper surface 911 and a fourth side surface 912.
  • the fourth upper surface 911 is provided with a receiving cavity 94 for receiving the urea nozzle 12 and a recess 95 for receiving the convex portion 52. Referring to FIG. 55, the receiving cavity 94 extends downward into the extension 92.
  • the main body portion 91 is further provided with a cylindrical portion 917 that protrudes upward into the accommodating chamber 94 to support the urea nozzle 12.
  • the nozzle assembly housing 190 is also provided with the cooling assembly to cool the urea nozzle 12.
  • the cooling assembly is a water cooled assembly.
  • a cooling passage 141 located within the nozzle assembly housing 190 includes a first cooling passage 913 extending through the fourth side 912 and a second cooling passage 914 spaced from the first cooling passage 913.
  • the first cooling passage 913 is in communication with the inlet joint 103
  • the second cooling passage 914 is in communication with the outlet joint 104.
  • the nozzle assembly housing 190 is provided with an end cap 96 that seals around the periphery of the extension 92.
  • the end cap 96 is welded to the extension 92.
  • the nozzle assembly housing 190 forms an annular cooling groove 916 that communicates between the first cooling passage 914 and the second cooling passage 915 between the end cap 96 and the extension portion 92.
  • the mounting flange 93 is integrally machined with the body portion 91.
  • the mounting flange 93 can also be fabricated separately from the body portion 91 and then welded together.
  • the urea nozzle 12 includes a nozzle coil 121, a magnetic portion 81 that interacts with the nozzle coil 121, and a valve needle located below the magnetic portion 81.
  • the nozzle coil 121 is wound around the periphery of the magnetic portion 81.
  • the urea nozzle 12 further includes a sleeve portion 122 that is sleeved around the periphery of the nozzle coil 121.
  • the spring 83 is mounted in the magnetic portion 81 and the valve needle portion 82.
  • the valve needle portion 82 is provided with a tapered portion 821 and a valve needle 822 extending downward from the tapered portion 821.
  • the valve seat 84 includes a swirling vane 85 welded to the extension portion 92.
  • the swirling plate 85 is provided with an injection hole 851 that cooperates with the valve needle 822 and a plurality of swirl grooves 852 that communicate with the injection hole 851. Referring to FIG. 10, FIG. 50 and FIG.
  • the upper end of the magnetic portion 81 is sleeved with a fourth sealing ring 812 to seal against the inner wall of the receiving cavity 322, and the lower end of the magnetic portion 81 is sleeved.
  • the fifth seal ring 813 is sealed to the inner wall of the accommodating chamber 94.
  • the cylindrical portion 917 supports the valve needle portion 82, so that the valve needle portion 82 and the nozzle coil 121 can form a large overlap in the moving direction of the valve needle 822.
  • the electromagnetic force generated by the large nozzle coil 121 affects the valve needle portion 82, thereby reducing the drive current, reducing the power consumption of the urea nozzle 12, and reducing the amount of heat generation.
  • the accommodating chamber 94 is further provided with a spacer 86 that cooperates with the urea nozzle 12 to adjust a gap between the magnetic portion 81 and the valve needle portion 82. It can be understood that the stroke of the needle portion 82 is closely related to the above-described gap. By adjusting the gap by using the spacers 86 of different thicknesses, the stroke of the needle portion 82 can be accurately controlled to improve the accuracy of the urea nozzle 12.
  • the extension portion 92 is provided with a manifold 921, and the valve needle 822 extends into the manifold 921.
  • the magnetic portion 81 is provided with a first communication hole 811 communicating with the receiving cavity 322, and the valve needle portion 82 is provided with a second communication hole 823 communicating with the first communication hole 811, the tapered portion
  • the 821 is provided with a third communication hole 824 that communicates the second communication hole 823 with the manifold 921.
  • the swirl groove 852 is in communication with the manifold 921.
  • a lower portion of the sleeve portion 122 is received in the accommodating cavity 94, and a portion of the sleeve portion 122 protruding from the fourth upper surface 911 is received in the accommodating cavity 322.
  • the annular cooling groove 916 is located at the periphery of the collecting chamber 921.
  • an integrated device is applied to inject fuel into the exhaust of the engine to effect regeneration of the downstream diesel particulate filter (DPF).
  • the urea pump 11 can be replaced with a fuel pump, which can be replaced with a fuel nozzle, which can be replaced with a fuel.
  • the urea pump and the fuel pump are collectively referred to as a pump
  • the urea nozzle and the fuel nozzle are collectively referred to as a nozzle
  • the urea solution and fuel are collectively referred to as a fluid medium.
  • the integrated device 1 of the present invention is an integrated design, which can omit or shorten the prior art urea pipe for connecting the pump and the nozzle, and can also save the prior art pump supply.
  • the connectors between the various sensors and the harness in the unit can also be used without the need to heat the defrosting device, so the reliability is high.
  • the integrated device 1 of the present invention is compact in structure and small in size, and is convenient for installation of various types of vehicles.
  • the internal fluid medium passage is short, the pressure drop is small, the dead volume between the pump and the nozzle is small, and the efficiency is high.
  • the temperature sensor 171 and the pressure sensor 172 are close to the nozzle, and the injection pressure accuracy is high.
  • the integrated device 1 of the present invention can be water-cooled so that the temperature of the urea remaining in the integrated device 1 does not reach the crystallization point, and crystallization is less likely to occur.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Exhaust Gas After Treatment (AREA)

Abstract

L'invention concerne un appareil intégré à pompe et buse (1), qui comprend un ensemble pompe (18) et un ensemble buse (19). L'ensemble pompe (18) comporte une cavité de réception destinée à recevoir l'ensemble buse (19), et comprend une enveloppe d'ensemble pompe (180) et une pompe (11). L'enveloppe d'ensemble pompe (180) comprend un canal d'entrée (15) et un canal de sortie (16), le canal de sortie (16) étant en communication avec l'ensemble buse (19). L'ensemble pompe (18) comprend un couvercle (2), une bobine de moteur (111) utilisée pour entraîner la pompe, un corps magnétique (72) et un premier ensemble d'engrenage (74) et un second ensemble d'engrenage (75) qui entrent en prise l'un avec l'autre. L'ensemble buse (19) comprend une enveloppe d'ensemble buse (190) et une buse (12). L'ensemble buse (19) comprend également une bobine de buse (121), une partie magnétique (81), une partie de goupille de soupape (82), un ressort (83), et un joint d'étanchéité (86) utilisé pour ajuster l'espace entre la partie magnétique (81) et la partie de goupille de soupape (82). La course de la partie de goupille de soupape (82) peut être commandée avec précision au moyen du joint d'étanchéité (86), ce qui améliore la précision de la buse (12). L'appareil intégré présente une structure simple et compacte. L'invention concerne également un système de post-traitement de gaz d'échappement et un procédé de commande.
PCT/CN2017/079998 2016-06-06 2017-04-11 Appareil intégré, système de post-traitement de gaz d'échappement et procédé de commande WO2017211119A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201610393826 2016-06-06
CN201610393826.8 2016-06-06

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WO2017211119A1 true WO2017211119A1 (fr) 2017-12-14

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114635771A (zh) * 2022-02-24 2022-06-17 北汽福田汽车股份有限公司 尿素喷射管接头座、尿素喷射管路结构及车辆

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017211119A1 (fr) * 2016-06-06 2017-12-14 天纳克（苏州）排放系统有限公司 Appareil intégré, système de post-traitement de gaz d'échappement et procédé de commande

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