CN119189576B - Air supply unit of air suspension system and air supply method thereof - Google Patents
Air supply unit of air suspension system and air supply method thereof Download PDFInfo
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- CN119189576B CN119189576B CN202411509777.0A CN202411509777A CN119189576B CN 119189576 B CN119189576 B CN 119189576B CN 202411509777 A CN202411509777 A CN 202411509777A CN 119189576 B CN119189576 B CN 119189576B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G11/00—Resilient suspensions characterised by arrangement, location or kind of springs
- B60G11/26—Resilient suspensions characterised by arrangement, location or kind of springs having fluid springs only, e.g. hydropneumatic springs
- B60G11/27—Resilient suspensions characterised by arrangement, location or kind of springs having fluid springs only, e.g. hydropneumatic springs wherein the fluid is a gas
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G11/00—Resilient suspensions characterised by arrangement, location or kind of springs
- B60G11/26—Resilient suspensions characterised by arrangement, location or kind of springs having fluid springs only, e.g. hydropneumatic springs
- B60G11/30—Resilient suspensions characterised by arrangement, location or kind of springs having fluid springs only, e.g. hydropneumatic springs having pressure fluid accumulator therefor, e.g. accumulator arranged in vehicle frame
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G17/00—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load
- B60G17/02—Spring characteristics, e.g. mechanical springs and mechanical adjusting means
- B60G17/04—Spring characteristics, e.g. mechanical springs and mechanical adjusting means fluid spring characteristics
- B60G17/0408—Spring characteristics, e.g. mechanical springs and mechanical adjusting means fluid spring characteristics details, e.g. antifreeze for suspension fluid, pumps, retarding means per se
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G17/00—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load
- B60G17/02—Spring characteristics, e.g. mechanical springs and mechanical adjusting means
- B60G17/04—Spring characteristics, e.g. mechanical springs and mechanical adjusting means fluid spring characteristics
- B60G17/052—Pneumatic spring characteristics
- B60G17/0523—Regulating distributors or valves for pneumatic springs
- B60G17/0526—Distributor units, e.g. for retractable wheels
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G17/00—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load
- B60G17/02—Spring characteristics, e.g. mechanical springs and mechanical adjusting means
- B60G17/04—Spring characteristics, e.g. mechanical springs and mechanical adjusting means fluid spring characteristics
- B60G17/052—Pneumatic spring characteristics
- B60G17/0523—Regulating distributors or valves for pneumatic springs
- B60G17/0528—Pressure regulating or air filling valves
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G2202/00—Indexing codes relating to the type of spring, damper or actuator
- B60G2202/10—Type of spring
- B60G2202/15—Fluid spring
- B60G2202/152—Pneumatic spring
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Vehicle Body Suspensions (AREA)
Abstract
The invention discloses an air supply unit of an air suspension system and an air supply method thereof, comprising a forward air charging unit, a reverse air discharging unit and a controller, wherein the forward air charging unit comprises an electric air pump, an air storage tank, a first one-way valve and a first switch electromagnetic valve, an air outlet port of the electric air pump, the first one-way valve and the air storage tank are sequentially communicated and charge air to the air storage tank through the electric air pump, the first switch electromagnetic valve is communicated between an automobile air spring assembly and a pipeline between the first one-way valve and the air storage tank and supplements air to the automobile air spring assembly through the air storage tank, and the reverse air discharging unit comprises a second switch electromagnetic valve, a third switch electromagnetic valve, a fourth switch electromagnetic valve and a conversion air cylinder. The switching cylinder is provided with a low-pressure interface and a high-pressure interface, and the second switch electromagnetic valve is communicated between the automobile air spring component and the high-pressure interface. The invention increases the energy recycling function of the air suspension system and reduces the failure rate and energy consumption of the air pump.
Description
Technical Field
The invention belongs to the technical field of automobile air suspension, and particularly relates to an air supply unit of an air suspension system and an air supply method thereof.
Background
The suspension system is the whole support system composed of springs and shock absorbers between the vehicle body and the tires. The suspension system should function to support the vehicle body and improve the riding comfort, and different types of suspension systems may give different driving experiences to the driver. Among the many suspension systems, air suspension systems have been rapidly developed in recent years and have received high consumer attention, and are one of the key research objects of automobile chassis manufacturers.
Unlike conventional spring suspension systems, air springs are used to support the vehicle body and to adjust the air pressure and vehicle body height, either electrically or mechanically, to achieve better suspension comfort, stability and speed change performance. The utility model provides an air suspension system, air suspension system's working method and car, the axle of car passes through air suspension system and is connected with the frame, air suspension system includes first air spring and the second air spring of mutual parallel arrangement, first air spring and second air spring all connect between frame and axle, air suspension system still includes high fixing device, high fixing device's both ends are connected with frame and axle respectively, high fixing device's extending direction is parallel to first air spring's flexible direction, high fixing device can be followed first air spring's flexible direction and is flexible, the air suspension system can realize high and rigidity decoupling adjustment promptly.
The air pump in the air suspension system is responsible for inputting high-pressure gas into the air storage tank, and the air storage tank is responsible for inputting high-pressure gas into the air spring. When the height of the automobile body needs to be increased, namely the length of the air spring needs to be prolonged, the air storage tank is responsible for outputting high-pressure air to the air spring, when the height of the automobile body needs to be reduced, namely the length of the air spring needs to be shortened, the air spring directly discharges the high-pressure air inside the air spring to the surrounding atmosphere, and when the length of the air spring needs to be prolonged again, the air storage tank needs to output high-pressure air to the air spring again. The air pump is required to input high-pressure gas into the air storage tank as long as the gas in the air storage tank is discharged. However, such air suspension systems suffer from the following disadvantages:
1. The high-pressure air in the air spring is directly discharged outside and is not recovered, so that energy waste is caused.
2. After the high-pressure air of the air spring is discharged, the air pump needs to supplement corresponding amount of compressed air into the air storage tank, and as the air suspension system needs to be regulated at any time according to the road surface condition in the running process, the air spring can be discharged frequently, so that the air pump works for a long time correspondingly, and the failure rate of the air pump is increased.
3. The air pump of department's car is by electric energy drive, for example new energy automobile, and the air pump is one of the higher power spare part in the air suspension system, and the air pump works for a long time, and the electric energy consumption is great, influences the duration of car.
Disclosure of Invention
Aiming at the defects of the prior art, the energy recycling function of the air suspension system is increased, and meanwhile, the failure rate and the energy consumption of an air pump are reduced. The invention provides an air suspension system air supply unit which comprises a forward air charging unit, a reverse air discharging unit and a controller, wherein the forward air charging unit comprises an electric air pump, an air storage tank, a first one-way valve and a first switch electromagnetic valve, an air outlet port of the electric air pump, the first one-way valve and the air storage tank are sequentially communicated, the electric air pump charges air to the air storage tank through the electric air pump, the first switch electromagnetic valve is communicated between an automobile air spring assembly and a pipeline between the first one-way valve and the air storage tank, air is supplemented to the automobile air spring assembly through the air storage tank, the reverse air discharging unit comprises a second switch electromagnetic valve, a third switch electromagnetic valve, a fourth switch electromagnetic valve and a switching cylinder, the switching cylinder is provided with a low-voltage port and a high-voltage port, the second switch electromagnetic valve is communicated between the automobile air spring assembly and the high-voltage port, the pipeline between the second switch electromagnetic valve and the high-voltage port is communicated with the pipeline between the first one-way valve and the air storage tank through the electric air pump, and the third switch electromagnetic valve and the low-voltage port are respectively, and the first switch electromagnetic valve and the high-voltage port are connected with the first switch electromagnetic valve and the high-voltage port through the low-voltage port and the first switch electromagnetic valve and the fourth switch electromagnetic valve.
Compared with the prior art, the invention has the advantages that:
1. in the shortening process of the automobile air spring assembly, the discharged compressed air is not directly discharged, the switching cylinder is utilized to switch back and forth, the part of compressed air is pressurized and then is pressed into the air storage tank, and the energy in the discharged compressed air is fully utilized to realize energy recovery.
2. The supercharging process of the conversion cylinder is that the controller controls the on-off combination of the first switch electromagnetic valve, the second switch electromagnetic valve, the third switch electromagnetic valve and the fourth switch electromagnetic valve in practice, and the controller, the first switch electromagnetic valve, the second switch electromagnetic valve, the third switch electromagnetic valve and the fourth switch electromagnetic valve are low in power consumption, and the exhaust air pressure of the automobile air spring component can be improved only by the conversion cylinder, the electromagnetic valve on-off sequence and reasonable pipeline arrangement, namely, the energy recovery of an air suspension system is realized with low energy consumption, the electric energy consumption of the automobile is extremely low, and the original cruising ability of the automobile is not influenced.
3. Compared with the existing air suspension system, the reverse exhaust unit can reversely press the compressed air needing to be exhausted into the air storage tank, so that the consumption speed of the compressed air of the air storage tank can be reduced, the working time of the electric air pump is correspondingly reduced, the service life of the electric air pump is prolonged, and the failure rate is reduced.
4. The working time of the electric air pump is shorter, the consumed electric energy is less, and for the new energy pure electric vehicle, the consumption of the battery is correspondingly reduced, and the influence on the endurance time is smaller.
Preferably, a drying tank is arranged on a pipeline between the electric air pump and the first one-way valve, an air inlet interface of the drying tank is communicated with a pipeline between the fourth switch electromagnetic valve and the electric air pump, and an air outlet interface of the drying tank is communicated with a pipeline between the third switch electromagnetic valve and the low-pressure interface. The air outlet interface and the back blowing interface of the drying tank are communicated with a pipeline between the third switch electromagnetic valve and the low-pressure interface through two-position three-way electromagnetic valves and are used for switching the filtering state and the back blowing state of the drying tank. The compressed air output by the electric air pump contains moisture, the moisture in the wet compressed air is adsorbed and intercepted in the drying tank after passing through the drying tank, one part of the compressed air released by the automobile air spring assembly is pressed into the air storage tank for recycling, the other part of the compressed air enters from the blowback interface of the drying tank, the moisture adsorbed in the drying tank is blown out, and finally, the moisture passes through the fourth switch electromagnetic valve and is discharged to the atmosphere from the exhaust source. Even if the part of the compressed air discharged outside is not directly discharged to the atmosphere, the energy of the part of the compressed air is fully utilized to back flush the drying tank so as to realize water discharge, and the drying tank is ensured to be in a normal filtering state for a long time.
Preferably, a pneumatic overflow valve is arranged in a pipeline between the drying tank and the electric air pump. If the outlet pressure of the electric air pump is abnormally increased and exceeds the safety air pressure of the pneumatic overflow valve due to other reasons, such as the drying tank, the electromagnetic valve and the pipeline, the pneumatic overflow valve is automatically opened, and the damage of the electric air pump, the pipeline and the like due to the too high pressure is avoided.
The switching cylinder comprises a cylinder body, a low-pressure end cover, a high-pressure end cover and a piston body, wherein the low-pressure end cover and the high-pressure end cover are respectively and hermetically connected to two ends of the cylinder body, the piston body is hermetically sealed in a piston cavity of the cylinder body, a push rod of the piston body extends out of the high-pressure end cover, the piston body slides in the piston cavity, the piston cavity between the piston body and the low-pressure end cover is further made to be a low-pressure piston cavity, the piston cavity between the piston body and the high-pressure end cover is made to be a high-pressure piston cavity, and the low-pressure interface and the high-pressure interface are respectively communicated with the low-pressure piston cavity and the high-pressure piston cavity in a one-to-one correspondence manner. The area of the piston body corresponding to the low-pressure piston cavity is larger than that of the piston body corresponding to the high-pressure piston cavity, and the area difference exists between the low-pressure piston cavity and the high-pressure piston cavity, so that the pressure of the two cavities is different. When compressed air enters from the low-pressure piston cavity, the piston body is pushed to move towards one side of the high-pressure end cover, so that compressed air with higher air pressure than that of the air storage tank is formed in the high-pressure piston cavity, and the compressed air in the high-pressure piston cavity is sufficiently compressed into the air storage tank, so that energy recovery is realized.
The invention also provides a gas supply method of the gas supply unit of the air suspension system, which comprises two steps of forward gas filling and reverse gas discharging, wherein the forward gas filling is similar to the existing gas filling direction, and is started by an electric air pump, a drying tank is switched to a filtering state by a two-position three-way electromagnetic valve, so that compressed air is respectively pressed into a gas storage tank and a low-pressure piston cavity after passing through the drying tank, and the electric air pump is closed after the current gas pressure in the gas storage tank reaches the set gas pressure. The first switch electromagnetic valve is opened, compressed air in the air storage tank is supplemented into the automobile air spring assembly until the air pressure of the automobile air spring assembly reaches a preset value, and the first switch electromagnetic valve is closed.
Compared with the existing air suspension system exhaust method, the existing air suspension system directly exhausts compressed air, the second switch electromagnetic valve and the fourth switch electromagnetic valve are both opened, the drying tank is switched to a back blowing state through the two-position three-way electromagnetic valve, compressed air of the automobile air spring assembly enters the high-pressure piston cavity and pushes the piston body to the low-pressure end cover, and then the compressed air in the low-pressure piston cavity enters from a back blowing interface of the drying tank and finally is exhausted through the fourth switch electromagnetic valve, and the fourth switch electromagnetic valve is closed. The function of this step is to push the piston to one side of the low pressure end cap, and simultaneously to discharge the compressed air of the low pressure piston chamber to the atmosphere after passing through the recoil interface to reversely drain the moisture in the drying tank, so as to prepare for subsequent pressurization. Then, the second switch solenoid valve is closed, the third switch solenoid valve is opened, compressed air of the automobile air spring assembly enters the low-pressure piston cavity and pushes the piston body to the high-pressure end cover, and then compressed air in the high-pressure piston cavity is pressed into the air storage tank, and the third switch solenoid valve is closed. Because the air pressure in the air storage tank is higher than the air pressure of the automobile air spring assembly, the pressure boosting effect is obtained by utilizing the piston volume difference of the conversion cylinder, the air pressure of the high-pressure piston cavity is increased to be higher than the air pressure of the air storage tank, and the compressed air in the high-pressure piston cavity is smoothly pressed into the air storage tank, so that the energy recovery is realized. And finally repeating the steps until the compressed air to be discharged by the automobile air spring assembly is completely pressed into the air storage tank and is discharged from the fourth switch solenoid valve.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments described in the present application, and other drawings may be obtained according to the drawings without inventive effort to those skilled in the art.
FIG. 1 is a schematic diagram of a connection of a first embodiment;
FIG. 2 is a schematic diagram of a switching cylinder according to the first embodiment;
FIG. 3 is a split schematic of FIG. 2;
FIG. 4 is a cross-sectional view of FIG. 2;
FIG. 5 is a schematic diagram of a connection of a second embodiment;
fig. 6 is a connection diagram of a second embodiment.
The air pump is characterized by comprising the following components of 1, a controller, 2, an electric air pump, 3, an air storage tank, 4, a first one-way valve, 5, a second one-way valve, 6, a first switch electromagnetic valve, 7, a second switch electromagnetic valve, 8, a third switch electromagnetic valve, 9, a fourth switch electromagnetic valve, 10, a fifth switch electromagnetic valve, 11, a two-position three-way electromagnetic valve, 12, a drying tank, 13, a conversion air cylinder, 14, an automobile air spring assembly, 15, an exhaust source, 16, a cylinder body, 17, a low-pressure end cover, 18, a high-pressure end cover, 19, a piston body, 20, a low-pressure interface and 21, and a high-pressure interface.
Detailed Description
In view of the shortcomings in the prior art, the inventor of the present application has long studied and practiced in a large number of ways to propose the technical scheme of the present application. The technical scheme, implementation process and principle of the present application will be further explained with reference to the drawings and specific embodiments in the embodiments of the present application.
It should be noted that the embodiments described below by referring to the drawings are exemplary only for explaining the present invention and are not to be construed as limiting the present invention, and the described embodiments are only some embodiments of the present invention, not all embodiments. The invention is to cover alternatives, modifications, equivalents, and variations of the invention as may be included within the spirit, principles and scope of the invention as defined by the appended claims as would be apparent to one of ordinary skill in the art to which the invention pertains without inventive faculty.
In the description of the present application, the terms "first," "second," "third," and the like do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. Likewise, the terms "a" or "an" and the like do not denote a limitation of quantity, but rather denote the presence of at least one. The word "comprising" or "comprises", and the like, is intended to mean that elements or items that are present in front of "comprising" or "comprising" are included in the word "comprising" or "comprising", and equivalents thereof, without excluding other elements or items. The terms "connected" or "connected," and the like, are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect.
Embodiment one:
an embodiment provides an air supply unit of an air suspension system, where the air supply unit can be used in an air suspension system of an existing internal combustion engine automobile, and the air suspension system of a new energy automobile includes a pure electric new energy automobile, a hybrid new energy automobile, and other automobiles with air suspension systems.
The air supply unit in this embodiment is as follows:
As shown in fig. 1, the air supply unit includes a forward air charging unit, a reverse air discharging unit and a controller 1, wherein the controller 1 adopts a programmable vehicle-mounted control unit, the vehicle-mounted control unit is generally integrated on an ECU of a vehicle, the specific model of the vehicle-mounted control unit is not limited, and the ECU technology is mature and stable, so that the functions of the forward air charging unit and the reverse air discharging unit can be satisfied.
The forward direction inflating unit in this embodiment includes an electric air pump 2, an air tank 3, a first check valve 4, and a first on-off solenoid valve 6. The air outlet port of the electric air pump 2, the first one-way valve 4 and the air storage tank 3 are sequentially communicated, and the air storage tank 3 is inflated through the electric air pump 2. The pneumatic overflow valve is arranged at the air outlet interface of the electric air pump 2, the pneumatic overflow valve is provided with a safe air pressure value, and once the real-time air pressure of the air outlet interface of the electric air pump 2 is higher than the safe air pressure value, the pneumatic overflow valve is automatically opened, so that the electric air pump 2, a pipeline and the like are prevented from being damaged due to the fact that the pressure is too high. The first switch electromagnetic valve 6 is communicated between the automobile air spring assembly 14 and a pipeline between the first one-way valve 4 and the air storage tank 3, and air is supplemented to the automobile air spring assembly 14 through the air storage tank 3.
The reverse exhaust unit in this embodiment is as follows:
The reverse exhaust unit includes a second switching solenoid valve 7, a third switching solenoid valve 8, a fourth switching solenoid valve 9, and a switching cylinder 13. The switching cylinder 13 is provided with a low-pressure interface 20 and a high-pressure interface 21, the second switching electromagnetic valve 7 is communicated between the automobile air spring assembly 14 and the high-pressure interface 21, and a pipeline between the second switching electromagnetic valve 7 and the high-pressure interface 21 and a pipeline between the first one-way valve 4 and the air storage tank 3 are provided with a second one-way valve 5 for preventing the air from flowing back from the air storage tank 3 to the high-pressure interface 21. Wherein the conducting direction of the first one-way valve 4 is the direction towards the air storage tank 3, and the conducting direction of the second one-way valve 5 is the direction towards the high-pressure port 21. The third switch electromagnetic valve 8 is communicated between the automobile air spring assembly 14 and the low-pressure port 20, and a pipeline between the third switch electromagnetic valve 8 and the low-pressure port 20 is communicated with the exhaust source 15 through the fourth switch electromagnetic valve 9, and a pipeline between the third switch electromagnetic valve 8 and the low-pressure port 20 is communicated with a pipeline between the electric air pump 2 and the first one-way valve 4.
The specific structure of the switching cylinder 13 in the present embodiment is as follows:
As shown in fig. 2 to 4, the switching cylinder 13 comprises a cylinder body 16, a low-pressure end cover 17, a high-pressure end cover 18 and a piston body 19, wherein the low-pressure end cover 17 and the high-pressure end cover 18 are respectively connected to two ends of the cylinder body 16 in a sealing mode, the piston body 19 is slidably sealed in a piston cavity of the cylinder body 16, a push rod of the piston body 19 extends out of the high-pressure end cover 18, the piston body 19 slides in the piston cavity, so that the piston cavity between the piston body 19 and the low-pressure end cover 17 is a low-pressure piston cavity, and the piston cavity between the piston body 19 and the high-pressure end cover 18 is a high-pressure piston cavity, and the low-pressure port 20 and the high-pressure port 21 are respectively communicated with the low-pressure piston cavity and the high-pressure piston cavity in a one-to-one correspondence mode. The area of the piston body 19 corresponding to the low-pressure piston cavity is larger than that of the piston body 19 corresponding to the high-pressure piston cavity, and the area difference exists between the low-pressure piston cavity and the piston body, so that the pressure of the two cavities is different. When compressed air enters from the low-pressure piston chamber, the piston body 19 is pushed to move toward the high-pressure end cap 18 side, so that compressed air having a higher air pressure than the air tank 3 is formed in the high-pressure piston chamber.
The controller 1 in the present embodiment is electrically connected to an electric air pump 2, a first switching solenoid valve 6, a second switching solenoid valve 7, a third switching solenoid valve 8, and a fourth switching solenoid valve 9, respectively. The memory module of the controller 1 stores automatic operation programs of the forward inflation unit and the reverse exhaust unit. The automatic operation program of the forward inflation unit is that the electric air pump 2 is started, the air storage tank 3 is pressurized to the set pressure, and then the air suspension system is inflated at any time by controlling the on-off of the first switch electromagnetic valve 6. The automatic operation program of the reverse exhaust unit is to press the compressed air exhausted by the air suspension system into the air storage tank 3 for reuse by utilizing the on-off state of the second switch electromagnetic valve 7, the third switch electromagnetic valve 8 and the fourth switch electromagnetic valve 9 and the supercharging ratio of the conversion cylinder 13, so that the compressed air consumption speed of the air storage tank 3 can be reduced, the working time of the electric air pump 2 is correspondingly reduced, the service life of the electric air pump 2 is prolonged, and the failure rate is reduced. In addition, the working time of the electric air pump 2 is shorter, the consumed electric energy is less, and for the new energy pure electric vehicle, the consumption of the battery is correspondingly reduced, and the influence on the endurance time is smaller.
Embodiment two:
the second embodiment provides another air supply unit of the air suspension system, and the second embodiment has the same reference numerals as the first embodiment, and is different from the first embodiment in that a water filtering and reverse drainage pipeline is added on the basis of the first embodiment, and the air supply unit specifically comprises the following components:
As shown in fig. 5, a drying tank 12 is provided in the pipeline between the electric air pump 2 and the first check valve 4, the air inlet port of the drying tank 12 is communicated with the pipeline between the fourth switch solenoid valve 9 and the electric air pump 2, and the air outlet port of the drying tank 12 is communicated with the pipeline between the third switch solenoid valve 8 and the low-pressure port 20. The air outlet port and the back blowing port of the drying tank 12 are communicated with a pipeline between the third switch electromagnetic valve 8 and the low-pressure port 20 through a two-position three-way electromagnetic valve 11, and are used for switching the filtering state and the back blowing state of the drying tank 12. The two-position three-way electromagnetic valve 11 is electrically connected with the controller 1. And a pneumatic relief valve is provided in the line between the drying tank 12 and the electric air pump 2. If the outlet pressure of the electric air pump 2 is abnormally increased and exceeds the safety air pressure of the pneumatic relief valve due to other reasons, such as the drying tank 12, the solenoid valve, and the pipeline, the pneumatic relief valve is automatically opened.
In this embodiment, the compressed air output by the electric air pump 2 contains moisture, the moisture in the wet compressed air is absorbed and intercepted in the drying tank 12 after passing through the drying tank 12, a part of the compressed air released by the automobile air spring assembly 14 is pressed into the air storage tank 3 for recycling, and the other part of the compressed air enters from the back blowing interface of the drying tank 12 to blow out the moisture absorbed in the drying tank 12, and finally passes through the fourth switch solenoid valve 9 to be discharged to the atmosphere from the exhaust source 15. Even if the part of the compressed air discharged outside is not directly discharged to the atmosphere, the energy of the part of the compressed air is fully utilized to back flush the drying tank 12 so as to realize water discharge, and the drying tank 12 is ensured to be in a normal filtering state for a long time.
In addition, as shown in fig. 6, most automobile air spring assemblies 14 of the automobile are provided with four groups, that is, each wheel corresponds to one group of automobile air spring assemblies 14, the four groups of automobile air spring assemblies 14 are respectively communicated with the first switch electromagnetic valve 6, or a fifth switch electromagnetic valve 10 is arranged at each automobile air spring assembly 14, and the four fifth switch electromagnetic valves 10 are respectively communicated with the first switch electromagnetic valve 6. I.e. the first switching solenoid valve 6 acts as a total on-off solenoid valve for the four car air spring assemblies 14, and the four fifth switching solenoid valves 10 act as on-off solenoid valves. This has the advantage that, during maintenance of a single vehicle air spring assembly 14, the fifth switching solenoid valve 10 associated with that vehicle air spring assembly 14 can be closed, thereby avoiding the effect on the remaining three vehicle air spring assemblies 14.
Embodiment III:
The third embodiment provides a method for supplying air to an air suspension system, and the third embodiment is the same as the second embodiment in reference numerals, and is based on the second embodiment.
The air supply method of the third embodiment comprises forward air charging and reverse air discharging, wherein the forward air charging comprises the following steps:
the electric air pump 2 is started, the drying tank 12 is switched to a filtering state through the two-position three-way electromagnetic valve 11, the filtering state means that an air inlet interface and an air outlet interface of the drying tank 12 are connected to pipelines, and then compressed air is respectively pressed into the air storage tank 3 and the low-pressure piston cavity after passing through the drying tank 12 until the current air pressure in the air storage tank 3 reaches the set air pressure, and the electric air pump 2 is closed. The first switching solenoid valve 6 is opened, and if the fifth switching solenoid valve 10 is provided, the fifth switching solenoid valve 10 is simultaneously opened. The compressed air in the air storage tank 3 is supplemented into the automobile air spring assembly 14 until the air pressure of the automobile air spring assembly 14 reaches a preset value, the first switching electromagnetic valve 6 is closed, and if the fifth switching electromagnetic valve 10 is arranged, the fifth switching electromagnetic valve 10 is closed at the same time.
After the forward inflation, in the reverse inflation process, the fifth on-off electromagnetic valve 10 needs to be in an open state, and the reverse inflation steps are as follows:
The second switch electromagnetic valve 7 and the fourth switch electromagnetic valve 9 are both opened, the drying tank 12 is switched to a blowback state through the two-position three-way electromagnetic valve 11, and in the blowback state, a blowback interface and an air outlet interface of the drying tank 12 are connected into a pipeline. However, if the air pressure in the air storage tank 3 is lower than the air pressure in the air spring assembly 14 of the automobile, the second switch electromagnetic valve 7 is opened, the fourth switch electromagnetic valve 9 is kept closed, and when the compressed air in the air spring assembly 14 of the automobile is preferentially pressed into the air storage tank 3 and reaches the air pressure equal, the fourth switch electromagnetic valve 9 is opened. This special case may be when the air tank 3 is used for other pneumatic components and is not timely supplied with air, resulting in a lack of air in the air tank 3. Then compressed air of the automobile air spring assembly 14 enters the high-pressure piston cavity and pushes the piston body 19 to the low-pressure end cover 17, so that compressed air in the low-pressure piston cavity enters from the blowback interface of the drying tank 12 and finally is discharged through the fourth switch solenoid valve 9, and the fourth switch solenoid valve 9 is closed. The function of this step is to push the piston to one side of the low pressure end cap 17 and simultaneously to pass the compressed air of the low pressure piston chamber through the back flush port to reverse drain the moisture in the drying tank 12 and then to the atmosphere in preparation for subsequent pressurization. Then, the second switching electromagnetic valve 7 is closed, the third switching electromagnetic valve 8 is opened, the compressed air of the automobile air spring assembly 14 enters the low-pressure piston cavity and pushes the piston body 19 to the high-pressure end cover 18, and then the compressed air in the high-pressure piston cavity is pressed into the air storage tank 3, and the third switching electromagnetic valve 8 is closed. Because the air pressure in the air storage tank 3 is higher than the air pressure of the automobile air spring assembly 14, but the area difference of the piston body 19 of the conversion cylinder 13 is utilized to obtain a supercharging effect, the air pressure of the high-pressure piston cavity is increased to be higher than the air pressure of the air storage tank 3, and the compressed air in the high-pressure piston cavity is smoothly pressed into the air storage tank 3, so that energy recovery is realized. Finally, the above steps are repeated until the compressed air to be discharged from the air spring assembly 14 of the automobile is completely compressed into the air tank 3 and discharged from the fourth switching solenoid valve 9.
The air supply method of the embodiment uses the back and forth switching of the switching cylinder 13 to pressurize part of the compressed air discharged by the air spring assembly 14 of the automobile and then press the pressurized part of the compressed air into the air storage tank 3 for reuse. The energy consumption in the supercharging process is only that the controller 1 controls the on-off combination of the first switch electromagnetic valve 6, the second switch electromagnetic valve 7, the third switch electromagnetic valve 8, the fourth switch electromagnetic valve 9 and the two-position three-way electromagnetic valve 11, the power is low, the electric air pump 2 does not work, the energy consumption is low, and therefore the energy in the discharged compressed air is fully utilized, and the energy recovery is realized.
In the description of the present application, unless explicitly specified and limited otherwise, terms of art or science are used in a general sense as understood by those skilled in the art to which the present application pertains, and terms such as "mounted," "connected," and "connected" are to be construed broadly, and may be either fixed or removable or contradictory or integral, and the detailed meaning of the terms in the present application may be understood as specific to those skilled in the art.
It should be understood that the foregoing embodiments are merely illustrative of the technical concept and features of the present invention, and are intended to enable those skilled in the art to understand the present invention and to practice it accordingly, it should not be construed that the present invention is limited to the embodiments, and that several simple deductions or substitutions may be made by those skilled in the art without departing from the spirit of the present invention, and all equivalent changes or modifications according to the spirit of the present invention shall be covered in the scope of the present invention.
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| CN112805163A (en) * | 2018-09-25 | 2021-05-14 | 日立安斯泰莫株式会社 | Air suspension device |
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| SU1498639A1 (en) * | 1986-09-11 | 1989-08-07 | Белорусский Политехнический Институт | Method of controlling characteristic of hydropneumatic suspension of cargo vehicle |
| GB9119534D0 (en) * | 1991-09-13 | 1991-10-23 | Dunlop Ltd | Vehicle suspension system |
| CN102294945B (en) * | 2010-06-25 | 2013-06-12 | 罗小洪 | Automobile air suspension damping device |
| CN103253099B (en) * | 2013-05-23 | 2015-06-10 | 江苏大学 | Closed loop gas circuit air suspension system with self-pressurization mechanism |
| CN103241091B (en) * | 2013-05-23 | 2016-01-27 | 江苏大学 | A kind of with the multistage air bellow closed loop air-channel system from booster body |
| JP6919648B2 (en) * | 2016-04-27 | 2021-08-18 | 株式会社アイシン | How to regenerate the dryer of the air suspension device |
| CN106427456B (en) * | 2016-07-26 | 2019-05-31 | 江苏大学 | A kind of high-low pressure chamber closed loop gas circuit airsuspension system is from pressure charging system |
| WO2020066398A1 (en) * | 2018-09-25 | 2020-04-02 | 日立オートモティブシステムズ株式会社 | Air suspension system |
| KR102514345B1 (en) * | 2018-11-27 | 2023-03-28 | 현대모비스 주식회사 | Air suspension device for vehicle and control method thereof |
| JP2023030619A (en) * | 2021-08-23 | 2023-03-08 | Ｔｏｙｏ Ｔｉｒｅ株式会社 | suspension system |
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| CN103241097A (en) * | 2013-05-23 | 2013-08-14 | 江苏大学 | Self-pressurized device with high pressure chamber and low pressure chamber of closed air loop air suspension system |
| CN112805163A (en) * | 2018-09-25 | 2021-05-14 | 日立安斯泰莫株式会社 | Air suspension device |
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