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WO2018134193A1 - Régulateur de pression pour une conduite de carburant commune d'un système d'injection haute pression - Google Patents

Régulateur de pression pour une conduite de carburant commune d'un système d'injection haute pression Download PDF

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Publication number
WO2018134193A1
WO2018134193A1 PCT/EP2018/050994 EP2018050994W WO2018134193A1 WO 2018134193 A1 WO2018134193 A1 WO 2018134193A1 EP 2018050994 W EP2018050994 W EP 2018050994W WO 2018134193 A1 WO2018134193 A1 WO 2018134193A1
Authority
WO
WIPO (PCT)
Prior art keywords
pressure
chamber
valve
pressure regulator
regulator
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/EP2018/050994
Other languages
German (de)
English (en)
Inventor
David Lacroix
Raphael Combe
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of WO2018134193A1 publication Critical patent/WO2018134193A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
    • F02M63/0012—Valves
    • F02M63/0031—Valves characterized by the type of valves, e.g. special valve member details, valve seat details, valve housing details
    • F02M63/005—Pressure relief valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
    • F02M63/0012—Valves
    • F02M63/0014—Valves characterised by the valve actuating means
    • F02M63/0015—Valves characterised by the valve actuating means electrical, e.g. using solenoid
    • F02M63/0017—Valves characterised by the valve actuating means electrical, e.g. using solenoid using electromagnetic operating means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
    • F02M63/02—Fuel-injection apparatus having several injectors fed by a common pumping element, or having several pumping elements feeding a common injector; Fuel-injection apparatus having provisions for cutting-out pumps, pumping elements, or injectors; Fuel-injection apparatus having provisions for variably interconnecting pumping elements and injectors alternatively
    • F02M63/0225—Fuel-injection apparatus having a common rail feeding several injectors ; Means for varying pressure in common rails; Pumps feeding common rails
    • F02M63/023—Means for varying pressure in common rails
    • F02M63/0235—Means for varying pressure in common rails by bleeding fuel pressure
    • F02M63/025—Means for varying pressure in common rails by bleeding fuel pressure from the common rail

Definitions

  • the present invention relates to a pressure regulator, which is combined with a common fuel line of a high-pressure injection system, which supplies an internal combustion engine, wherein the regulator comprises an electromagnetic valve with a pressure threshold whose input is connected to the high pressure chamber of the fuel line and its output in a Relief chamber opens, which is connected to the liquid return, wherein the valve has a body through which a channel, whose input is connected to the high-pressure chamber and whose outlet opens through the valve seat in the discharge chamber, and a closure member in the form of a ball, the is carried by the end of the rod, which is firmly connected to the electromagnet core and traverses the cavity.
  • Such a pressure regulator is known for common diesel fuel rail systems. So far, this type of regulator has been used primarily as a controlled relief valve and less as a pressure regulator as such.
  • Hydraulic simulations have shown that different types of flows could be present at the valve outlet for a range of increased flow / pressure.
  • the document DE 10 2012 111106 describes and represents an electromagnetic pressure regulator whose valve seat 11, which cooperates with the closure member 12, is provided with fixed blades 18a, b, c, d of very complex shape, radially the valve seat in the discharge chamber extend.
  • This very complex shape of the valve seat and its extension is intended to improve the flow by reducing the turbulence of the valve seat, which in turn is widened according to a curved cross-section.
  • the end of the rod of the electromagnet carries the ball that forms the lock. she will passed through the edges of the fixed blades on the axial inner side. But this solution would be too expensive to industrialize due to the complexity of its geometry and would not be suitable for automotive applications.
  • the object of the present invention is to develop a pressure regulator which makes it possible to have additional stability in a pressure / flow capacity, with reduced economic means compatible with the aim of this regulator.
  • the invention has as subject matter a pressure regulator of the type defined above, characterized in that the valve seat is covered with a jet regulator element forming a regulation chamber with the valve seat, this jet regulator element being traversed by at least one passage connecting the regulation chamber and the discharge chamber which is connected to the discharge fluid exit to orient the liquid flow lines through the passage and to produce a stabilizing pressure of the flow in the regulation chamber.
  • the shape of the jet regulator member is advantageously very simple, being adaptable by the washer according to the various structures of the body of the regulator for adjustment to the gap according to each case / application.
  • the invention considerably simplifies the execution of a pressure regulator that corresponds to various functional parameters.
  • the pressure regulators of various series are manufactured according to the applications with jet regulator bodies corresponding to each application.
  • the jet regulator member which covers the valve seat is a plate which is applied to the surface of the valve body around the valve seat, this plate being provided with a recess forming the regulation chamber which communicates with the discharge chamber through at least one Passage is connected.
  • the jet regulator element is traversed by the rod of the electromagnet which carries the closure member of the valve, leaving a passage for the discharge liquid.
  • the jet regulating element comprises an opening which is traversed by the rod of the electromagnet carrying the closing member and at least one other opening which thus connects the regulating chamber to the discharge chamber.
  • annular passage cross-section defined between the outer diameter of the rod in the regulation position and the diameter of the central opening of the jet regulator element and the adapted cross-section of any other openings create an optimal pressure drop for generating a pressure inside the regulation chamber.
  • Other peripheral openings may be added to orient other flow lines of the recirculation flow and adjust the pressure drop depending on the stroke of the rod.
  • the other openings are advantageously distributed symmetrically about the axis.
  • the shape of the jet regulator body and the inner contour of the volume, the number, size and shape of the openings are optimized by simulation depending on the geometry of the other parts of the valve body and the rod.
  • the Strahlreguliererorgan is advantageously a metallic part.
  • the invention also relates to the combination formed from a pressure regulator, as defined above, and a common fuel line of a high-pressure injection system.
  • Fig. 1 is an axial section of a first embodiment of a pressure regulator according to the invention
  • Fig. 1a is a sectional view of the pressure regulator shown opposite the end of the common rail where it is installed;
  • Fig. 1b is an enlarged scale view of the front end of the pressure regulator, shown in section, showing the valve separate from the receptacle in which it is installed at the end of the body of the regulator;
  • Fig. 2 is an axial sectional view of the second embodiment of the pressure regulator, which is limited to the front end of the pressure regulator.
  • the invention as subject matter has a pressure regulator 1, which is provided with a valve 2, which is controlled by an electromagnet 3, said regulator having a common fuel line 4 of an injection system of fuel is combined under high pressure in an internal combustion engine.
  • the components 1, 2, 3, 4 of the assembly thus formed have at least partially a rotational symmetry about the axis XX.
  • the pressure regulator 1 regulates the high pressure in the common rail 4 to a target pressure by opening to discharge the relief liquid from the high-pressure chamber 42.
  • the common rail 4 is formed of a cylindrical body 41 with a thick wall axis XX which surrounds the high pressure chamber 42 having its outlets connected to the high pressure injectors and having an inlet connected to the high pressure pump of the engine ,
  • the body 41 comprises a receptacle 43, which opens on the outside through an inlet 44, which is provided with an internal thread 441 in order to screw the pressure regulator 1.
  • the receptacle 43 forms a shoulder 431 at its junction with the opening of the chamber 42 in order to realize a sealing system for the regulator 1.
  • the receptacle 43 also has an outlet 45 for the liquid of the fuel line 4, which passes through the regulator 1. The outlet 45 is connected to the fuel reservoir.
  • the pressure regulator 1 has a cylindrical body 11, through which an axial bore 12 runs, which on the side of the common fuel line into a cavity 13, which receives the valve 2, by means of a discharge chamber 14 with a diameter , which is greater than that of the bore 12, which is connected by radial bores 15 with the return line 45 of the common fuel line 4, opens.
  • the body 11 has a receptacle 16 for the electromagnet 3, which is closed by a lid 161 which is pressed into the body (111) and is itself covered by a connecting element 17 which is connected to the electromagnet 3 by a non Wiring shown connected.
  • the valve 2 consists of a valve body 21 in the form of a plate, which is traversed by an axial channel 22, whose input is on the side of the common rail 4 in a nozzle 21 which is covered with a filter 23 in the form of a cap.
  • the channel 22 opens into a valve seat 24 with a conical shape.
  • the surface 21 a of the body 21, into which the seat 24 opens, is covered with a plate 25, which forms a regulation chamber 251 above the valve seat 24 and is provided with an opening 252.
  • This plate 25 is generally at the bottom 131 of the receptacle 13 with insects, an annular fitting 26th supported, which leaves the opening 252.
  • This fitting 26 makes it possible to compensate for the various adjustments of valves and electromagnets for one and the same body 11 of the pressure regulator.
  • the plate 25, which forms a discharge substance jet regulator element exiting the valve 2 thus limits the regulation chamber 251.
  • the valve 2 has a closure member 27 in the form of a ball, which is supported by the conical end 321 of the rod 32 of the electromagnet 3.
  • the other side 21 b of the body 21 has a sealing edge 212 to be applied to the shoulder 431 of the receptacle 43 and to realize a tight separation for the operating pressure of the common rail, so that the transmission of liquid to the output only via the channel 22 of the valve 2 can take place.
  • the opening 252 is traversed by the conical end 321 of the rod of the electromagnet, while leaving a circular space connecting the regulation chamber 251 with the discharge chamber 14.
  • the plate 25 breaks the jet of liquid at the exit of the valve seat 24 and creates in this regulation chamber 251 an intermediate pressure between the high pressure of the common rail 4 and the recirculation pressure in the unloading chamber 14, which is substantially equal to the ambient pressure, passing the discharge fluid through the opening of the valve 2 is released.
  • the solenoid 3, which controls the valve 2 has a core 31 carrying the rod 32, the conical end 321 of which is provided with the ball 27 constituting the closing member of the valve 2, as described above.
  • the core 31 of the electromagnet 3 is a planar core, but without the invention being limited to this type of electromagnet core.
  • the core 31 is fixedly connected to the rod 32, which slides in the bore 12 in the closing direction F of the valve 2 pushed by the electromagnet 3, which is controlled to regulate the high pressure to the target pressure. Since the liquid flow from the regulation chamber 251 must exit through the passageway which is exposed in the opening 252, it is itself stabilized, that is regulated, which attenuates the arrival of the relief fluid and the vibrations of the jet between the seat 24 and the ball 27 passes, dampens.
  • the core 31 is covered in the receptacle 16 by the cover 161, which is pressed into the receptacle 16 by the bent edges 111.
  • the electromagnet has a coil 33 which is embedded in the body 11 of the pressure regulator.
  • a return spring 34 is applied to the surface of the core 31, which is turned to the fuel line to act in the opening direction of the valve 2. This retraction movement of the core 31 and the rod 32 is limited by the fact that it comes to rest on the lid 161.
  • the pressure regulator 1 is fixed to the fuel line 4 by means of a nut 18 which freely surrounds the cylindrical body 11 and abuts a ring 181 which is in engagement with a groove 112 of the body 11.
  • the external thread 182 of the nut 18 is screwed into the internal thread 441 and the sealing edge 212 of the body 21 of the valve comes to rest against the surface of the shoulder 431 to ensure the tightness.
  • a seal 19 is also provided in a groove 112 to realize the tightness between the wall of the receptacle 43 and the body 11 for the liquid return, which exits from the radial bores 15 to the return line 45, which is integrated into the common fuel line 4 ,
  • the relief fluid flows under high pressure from the high pressure chamber 42 through the filter 23 and the passage 22 arrives between the ball 27 and the valve seat 24 and arrives in the regulation chamber 251, in which the liquid collects and dampens their movement, so as to be forcibly oriented in the opening 252 and to traverse the cross section passing through the conical End 321 is released.
  • the liquid flow establishes an intermediate pressure between that of the high-pressure chamber 42 and the outlet pressure, which is practically at ambient pressure. This intermediate pressure regulates the flow exiting in the space between the opening 252 and the conical end 321 of the rod.
  • This intermediate pressure makes it possible to reduce the turbulence at the exit of the seat 24.
  • the relief flow is oriented to the open space between the rod 321 and the edge of the opening 252. This discharge fluid flow, which is so deflected, stabilizes the function of the regulator 1 and the common rail 4, the pressure of which is finely stabilized to the target pressure.
  • Fig. 2 shows another embodiment 2a of the pressure regulator 1.
  • This embodiment differs from the previous one by the jet regulator element 25a, which is provided with an axial opening 252a for the end 321 of the rod 32 and openings 252b distributed around the axis in order to produce by their pressure drops a pressure of the regulation chamber 251 a, which stabilizes the pressure in the high pressure chamber 42 of the common rail 4.
  • the orifices 252b are preferably distributed with rotational symmetry about the axis XX to regulate and distribute the relief flow to the relief chamber 14, while creating an intermediate level of pressure in the regulation chamber 251a.
  • the number, dimensions and distribution of the flow passage cross sections of the various openings 251a, 251b are preferably defined by simulations.
  • the various embodiments are very simple and particularly adapt to any type of common rail pressure regulators.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Fuel-Injection Apparatus (AREA)
  • Magnetically Actuated Valves (AREA)

Abstract

L'invention concerne un régulateur de pression (1) qui est combiné à une conduite de carburant commune (4) comportant une soupape électromagnétique (2, 3) présentant une valeur seuil de pression et dont l'entrée (22) est relié à la chambre haute pression (42) et dont la sortie débouche dans une chambre de décharge (14) qui est reliée à un retour de liquide (15). Le siège de soupape (24) est recouvert d'un élément de régulation du jet (25) qui forme avec le siège de soupape (24) une chambre de régulation (251). L'élément de régulation du jet (25) est traversé par une ouverture (252) pour mettre la chambre de régulation (251) en communication avec la chambre de décharge (14) et pour orienter les lignes d'écoulement du fluide de retour à travers l'ouverture (252), et produire une pression de stabilisation du flux dans la chambre de régulation (251).
PCT/EP2018/050994 2017-01-18 2018-01-16 Régulateur de pression pour une conduite de carburant commune d'un système d'injection haute pression Ceased WO2018134193A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1750376A FR3061935A1 (fr) 2017-01-18 2017-01-18 Regulateur de pression pour une rampe commune d'une installation d'injection haute pression
FR1750376 2017-01-18

Publications (1)

Publication Number Publication Date
WO2018134193A1 true WO2018134193A1 (fr) 2018-07-26

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Application Number Title Priority Date Filing Date
PCT/EP2018/050994 Ceased WO2018134193A1 (fr) 2017-01-18 2018-01-16 Régulateur de pression pour une conduite de carburant commune d'un système d'injection haute pression

Country Status (2)

Country Link
FR (1) FR3061935A1 (fr)
WO (1) WO2018134193A1 (fr)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1992004214A1 (fr) * 1990-09-07 1992-03-19 Alfred Teves Gmbh Soupape electromagnetique pour systemes hydrauliques de freinage a regulation du glissement
WO1993008051A1 (fr) * 1991-10-25 1993-04-29 Itt Automotive Europe Gmbh Vanne electromagnetique a bruit reduit, notamment pour systeme hydrauliques de freinage a systeme d'antipatinage a l'acceleration
EP1106816A2 (fr) * 1999-11-30 2001-06-13 C.R.F. Società Consortile per Azioni Soupape électromagnétique de dosage pour un injecteur de combustible
DE102007013525A1 (de) 2007-03-21 2008-09-25 Robert Bosch Gmbh Druckregelventil
WO2013182366A1 (fr) * 2012-06-08 2013-12-12 Robert Bosch Gmbh Soupape de régulation de pression
DE102012111106B3 (de) 2012-11-19 2014-01-16 Kendrion (Villingen) Gmbh Elektromagnetisches Druckregelventil
DE102013222483A1 (de) 2013-11-06 2015-05-07 Robert Bosch Gmbh Druckregelventil

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1992004214A1 (fr) * 1990-09-07 1992-03-19 Alfred Teves Gmbh Soupape electromagnetique pour systemes hydrauliques de freinage a regulation du glissement
WO1993008051A1 (fr) * 1991-10-25 1993-04-29 Itt Automotive Europe Gmbh Vanne electromagnetique a bruit reduit, notamment pour systeme hydrauliques de freinage a systeme d'antipatinage a l'acceleration
EP1106816A2 (fr) * 1999-11-30 2001-06-13 C.R.F. Società Consortile per Azioni Soupape électromagnétique de dosage pour un injecteur de combustible
DE102007013525A1 (de) 2007-03-21 2008-09-25 Robert Bosch Gmbh Druckregelventil
WO2013182366A1 (fr) * 2012-06-08 2013-12-12 Robert Bosch Gmbh Soupape de régulation de pression
DE102012111106B3 (de) 2012-11-19 2014-01-16 Kendrion (Villingen) Gmbh Elektromagnetisches Druckregelventil
DE102013222483A1 (de) 2013-11-06 2015-05-07 Robert Bosch Gmbh Druckregelventil

Also Published As

Publication number Publication date
FR3061935A1 (fr) 2018-07-20

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