Closed air suspension compressor not integrated with controller and compatible with single air storage tank and double air storage tanks

Abstract

The invention provides a closed air suspension compressor not integrated with a controller and compatible with single and double air storage tanks, and belongs to the technical field of compressors. An air inlet, an air outlet, a high-pressure air storage tank, a low-pressure air storage tank, an FL-left front air spring, an FR-right front air spring, an RL-left rear air spring, an RR-right rear air spring and a motor assembly are arranged at the top of the valve body; an air cylinder and a drying barrel are arranged on the side wall of the valve body. A double-air-storage-tank structure is adopted, in the rapid chassis descending mode, the compressor extracts high-pressure air in the air spring to the low-pressure air storage tank, and in the rapid chassis descending mode, the compressor further extracts the high-pressure air in the air spring to the high-pressure air storage tank, so that the problem that in the closed compressor, the high-pressure air in the low-pressure air storage tank does not exist in the high-pressure air storage tank is solved. And the descending speed of the chassis is low.

Description

Technical Field

[0001] The present invention relates to the technical field of compressors, and in particular to a closed air suspension compressor which is not integrated with a controller and is compatible with single and double air storage tanks. Background Art

[0002] With the development of automobile chassis technology, air suspension systems have been widely used due to their excellent comfort and handling.

[0003] As the power unit of the whole system, the air compressor carries the core requirements of chassis lifting and lowering, air springs, and air tank energy storage. Compared with the open air suspension system, the closed air suspension system usually integrates the air compressor, distribution valve, controller and other components together. The chassis requires less space and has a high degree of product integration, which can effectively reduce development costs.

[0004] However, as chassis domain control technology matures, OEMs' demands have gradually shifted to requiring domain controllers to complete system control of all chassis components, with each sub-component serving only as an execution unit and not individually controlled. Therefore, closed compressors without integrated controllers came into being.

[0005] The current closed air suspension compressor problems are as follows:

[0006] 1. The chassis is slow to descend: The closed compressor needs to be involved in the work of the compressor whether the chassis is descending or ascending. Unlike the open system, the air spring high-pressure gas can be directly discharged to the air tank, which leads to the slow chassis descent speed. The compressors on the market use a similar single air tank solution (9 solenoid valves) or a double air tank solution (12 solenoid valves). The double air tank solution can be referred to Fig.16 The compressor is used to extract the high-pressure air in the air spring to the air tank, and the chassis descends slowly.

[0007] 2. The design of the dual gas tank solution is complex: the dual tank solution in the prior art is purely due to the limited chassis space, which is forced to be divided into two. Fig.16 , its internal gas circuit is still a single tank solution, which cannot realize the advantages of high and low pressure gas storage tanks. Summary of the invention

[0008] In order to make up for the above shortcomings, the present invention provides a closed air suspension compressor without an integrated controller and compatible with single and double air tanks, aiming to improve the problems of slow chassis lowering speed and complex design of the double air tank solution.

[0009] The present invention is achieved in that:

[0010] The present invention provides a closed air suspension compressor without an integrated controller and compatible with single and double air tanks, comprising a valve body and a connector installed on the glue-filled sealing area of ​​a solenoid valve, wherein the top of the valve body is provided with an air inlet, an exhaust port, a high-pressure air tank, a low-pressure air tank, FL-left front air spring, FR-right front air spring, RL-left rear air spring, RR-right rear air spring and a motor assembly; the side wall of the valve body is provided with a cylinder and a drying barrel.

[0011] Preferably, the valve body is provided with an LR solenoid valve, an RV1 solenoid valve, an RV2 solenoid valve, an RV3 solenoid valve and an RV4 solenoid valve.

[0012] Preferably, the valve body is provided with:

[0013] A1 air pipe: the FL-left front air spring, the FR-right front air spring, the RL-left rear air spring and the RR-right rear air spring are sequentially arranged in parallel on the A1 air pipe.

[0014] Preferably, one end of the LR solenoid valve is connected to the low-pressure gas storage tank, and the other end is connected to the A1 gas pipe.

[0015] Preferably, the valve body is provided with:

[0016] A2 gas pipe: The A2 gas pipe is arranged at one end of the RV4 solenoid valve, and the other end of the RV4 solenoid valve is connected to the A1 gas pipe.

[0017] Preferably, one end of the RV3 solenoid valve is connected to the A1 gas pipe, and the other end is connected to one end of the RV2 solenoid valve;

[0018] The connection position between the RV3 solenoid valve and the A1 air pipe is located between the RL-left rear air spring and the RR-right rear air spring connected to the A1 air pipe.

[0019] Preferably, one end of the RV2 solenoid valve is connected to the high-pressure gas storage tank, and the other end of the RV2 solenoid valve is connected to the A3 gas pipe, and one end of the RV3 solenoid valve is connected to the A3 gas pipe.

[0020] Preferably, one end of the RV1 solenoid valve is connected to the connecting pipe between the RV2 solenoid valve and the high-pressure gas storage tank; the other end is connected to the A2 gas pipe through the A4 gas pipe.

[0021] Preferably, the A2 gas pipeline is further connected to an A5 gas pipeline, the other end of the A5 gas pipeline is connected to the air inlet, and the connection position of the A5 gas pipeline and the A2 gas pipeline is located downstream of the connection position of the A4 gas pipeline and the A2 gas pipeline;

[0022] The A5 air delivery pipe is connected in sequence with an air filter, a guide valve A, a pump, a drying barrel and a one-way valve B;

[0023] The A3 air supply pipe is connected to the A5 air supply pipe, and the connection position is located between the guide valve A and the pump.

[0024] Preferably, a pressure relief valve is connected in parallel with the pump on the A5 gas pipeline;

[0025] The A5 gas pipeline is also connected to the A6 gas pipeline, and the A6 gas pipeline is connected to a mechanical exhaust valve and an electromagnetic exhaust valve, and the other end of the electromagnetic exhaust valve is connected to the exhaust port.

[0026] The beneficial effects of the present invention are:

[0027] The present invention adopts a dual air tank structure. In the rapid chassis descent mode, the compressor draws high-pressure air in the air spring to the low-pressure air tank. The present invention also has a rapid chassis descent mode. That is, in the rapid chassis descent mode, the compressor further draws high-pressure air in the air spring to the high-pressure air tank, thereby solving the problem of slow chassis descent speed in the closed compressor.

[0028] In addition, the present invention adopts 10 solenoid valves to realize the high and low pressure dual gas tank solution. Compared with the 12 solenoid valve design in the prior art, it can also meet the demand for rapid lowering of the chassis, and can also realize the advantages of an open system under certain working conditions. Moreover, the 10 solenoid valves used in the present invention can also be compatible with the advantages of a single gas tank, providing more freedom in chassis layout. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0030] Figure 1 It is a schematic structural diagram of a closed air suspension compressor without an integrated controller and compatible with single and double air storage tanks provided in an embodiment of the present invention;

[0031] Figure 2 It is a top view of a closed air suspension compressor without an integrated controller and compatible with single and double air storage tanks provided in an embodiment of the present invention;

[0032] Figure 3 A closed air suspension compressor without an integrated controller and compatible with single and double air storage tanks provided by an embodiment of the present invention is in a single and double air storage tank solution switching mode diagram;

[0033] Figure 4 A closed air suspension compressor without an integrated controller and compatible with single and double air tanks provided by an embodiment of the present invention is in a state diagram of a single and double air tank being in a fast chassis descent mode;

[0034] Figure 5 It is a state diagram of a closed air suspension compressor without an integrated controller and compatible with single and double air tanks provided by an embodiment of the present invention, in which the single and double air tanks are in a rapid chassis descent mode;

[0035] Figure 6 It is a state diagram of a closed air suspension compressor without an integrated controller and compatible with single and double air storage tanks provided by an embodiment of the present invention, in which a single and double air storage tank is in the process of emptying the residual gas in the low-pressure tank;

[0036] Figure 7 It is a state diagram of a closed air suspension compressor without an integrated controller and compatible with single and double air tanks provided by an embodiment of the present invention, in which the single and double air tanks are in a conventional lifting mode of the chassis;

[0037] Figure 8 It is a state diagram of a closed air suspension compressor without an integrated controller and compatible with single and double air tanks provided by an embodiment of the present invention, in which the single and double air tanks are in a chassis fast (silent) lifting mode;

[0038] Fig. 9 A closed air suspension compressor without an integrated controller and compatible with single and double air storage tanks provided by an embodiment of the present invention is in a state diagram of a single and double air storage tank being in a road impact load relief mode;

[0039] Fig.10 It is a state diagram of a closed air suspension compressor without an integrated controller and compatible with single and double air storage tanks in a single and double air storage tank empty spring exhaust to the outside mode provided by an embodiment of the present invention;

[0040] Fig.11 It is a state diagram of a closed air suspension compressor without an integrated controller and compatible with single and double air storage tanks provided by an embodiment of the present invention, in which the single and double air storage tanks are in a high-pressure air storage tank exhaust mode to the outside;

[0041] Fig.12 It is a state diagram of a closed air suspension compressor without an integrated controller and compatible with single and double air storage tanks provided by an embodiment of the present invention, in which the single and double air storage tanks are in an air replenishment working mode;

[0042] Fig.13 A closed air suspension compressor without an integrated controller and compatible with single and double air storage tanks provided by an embodiment of the present invention is in a state diagram of a single and double air storage tank being in a pressure protection (internal leakage) mode;

[0043] Fig.14It is a state diagram of a closed air suspension compressor without an integrated controller and compatible with single and double air storage tanks provided by an embodiment of the present invention, in which the single and double air storage tanks are in a pressure protection (external leakage) mode;

[0044] Fig.15 It is a state diagram of a closed air suspension compressor without an integrated controller and compatible with single and double air storage tanks provided by an embodiment of the present invention, in which the single and double air storage tanks are in manual exhaust (maintenance mode);

[0045] Fig.16 It is an electrical diagram of a closed air suspension compressor in the prior art.

[0046] In the figure: 1. Motor assembly; 2. Drying barrel; 3. Valve body; 4. Connector; 5. Cylinder; 6. Solenoid valve glue filling and sealing area; 7. Air inlet; 8. Exhaust port; 9. High-pressure air tank; 10. Low-pressure air tank; 11. FL - left front air spring; 12. FR - right front air spring; 13. RL - left rear air spring; 14. RR - right rear air spring. DETAILED DESCRIPTION

[0047] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0048] Example

[0049] Reference Figure 1-Figure 15 A closed air suspension compressor without an integrated controller and compatible with single and double air tanks, comprising a valve body 3 and a connector 4 installed on a solenoid valve glue-filled sealing area 6, the top of the valve body 3 is provided with an air inlet 7, an exhaust port 8, a high-pressure air tank 9, a low-pressure air tank 10, FL-left front air spring 11, FR-right front air spring 12, RL-left rear air spring 13, RR-right rear air spring 14 and a motor assembly 1; the side wall of the valve body 3 is provided with a cylinder 5 and a drying barrel 2.

[0050] It should be added that: the valve body 3 is provided with LR solenoid valve, RV1 solenoid valve, RV2 solenoid valve, RV3 solenoid valve and RV4 solenoid valve. Among them, RV1 solenoid valve, RV2 solenoid valve, RV3 solenoid valve and RV4 solenoid valve are two-position two-way reversing solenoid valves; FL-left front air spring 11, FR-right front air spring 12, RL-left rear air spring 13, RR-right rear air spring 14 and LR solenoid valve are two-position two-way solenoid valves with one-way conduction.

[0051] Based on the internal structure of the valve body 3, refer to Figure 3-Figure 15 , the present invention makes the following description on the internal structure:

[0052] 1. An A1 air pipe is arranged in the valve body 3: FL-left front air spring 11, FR-right front air spring 12, RL-left rear air spring 13 and RR-right rear air spring 14 are arranged in parallel on the A1 air pipe in sequence;

[0053] 2. One end of the LR solenoid valve is connected to the low-pressure gas storage tank 10, and the other end is connected to the A1 gas pipeline.

[0054] 3. An A2 gas pipe is arranged in the valve body 3: the A2 gas pipe is arranged at one end of the RV4 solenoid valve, and the other end of the RV4 solenoid valve is connected to the A1 gas pipe.

[0055] 4. One end of the RV3 solenoid valve is connected to the A1 gas pipe, and the other end is connected to one end of the RV2 solenoid valve;

[0056] The connection position between the RV3 solenoid valve and the A1 air pipe is located between the RL-left rear air spring 13 and the RR-right rear air spring 14 connected to the A1 air pipe.

[0057] 5. One end of the RV2 solenoid valve is connected to the high-pressure gas storage tank 9, and the other end of the RV2 solenoid valve is connected to the A3 gas pipe, and one end of the RV3 solenoid valve is connected to the A3 gas pipe.

[0058] 6. One end of the RV1 solenoid valve is connected to the pipeline connecting the RV2 solenoid valve and the high-pressure gas storage tank 9; the other end is connected to the A2 gas pipeline through the A4 gas pipeline.

[0059] 7. A2 gas pipeline is also connected to A5 gas pipeline, the other end of which is connected to air inlet 7, and the connection position between A5 gas pipeline and A2 gas pipeline is located downstream of the connection position between A4 gas pipeline and A2 gas pipeline; A5 gas pipeline is sequentially connected to air filter, guide valve A, pump, drying barrel and one-way valve B; A3 gas pipeline is connected to A5 gas pipeline, and the connection position is located between guide valve A and pump. Figure 3-Figure 15 , the air filter is the Filter in the figure, the drying barrel is the Dryer in the figure, and the pump is the pump in the figure. The pump is an air extraction pump in the prior art.

[0060] 8. A pressure relief valve is connected in parallel with the pump on the A5 gas pipeline; the A5 gas pipeline is also connected to the A6 gas pipeline, and the A6 gas pipeline is connected to a mechanical exhaust valve and an electromagnetic exhaust valve, and the other end of the electromagnetic exhaust valve is connected to the exhaust port 8. Figure 3-Figure 15 , the mechanical exhaust valve is the PRV in the figure, and the electromagnetic exhaust valve is the EV in the figure.

[0061] Finally, it should be added that a sensor is also provided in the valve body, see Figure 3-Figure 15The sensor is the Sensor in the figure, and the sensor is electrically connected to FL-left front air spring 11, FR-right front air spring 12, RL-left rear air spring 13, RR-right rear air spring 14, LR solenoid valve, RV1 solenoid valve, RV2 solenoid valve, RV3 solenoid valve, RV4 solenoid valve and solenoid exhaust valve.

[0062] The working principle of this closed air suspension compressor without integrated controller and compatible with single and double air tanks:

[0063] 1. Switching between single and double gas storage tanks

[0064] Reference Figure 3 , the shielded LR solenoid valve realizes the mutual switching between the single gas tank solution and the double gas tank solution, meeting the complementarity between high performance and high cost performance.

[0065] 2. Rapid chassis descent mode

[0066] Reference Figure 4 The chassis lowering includes two working conditions: the front axle lowering and the rear axle lowering (the figure only shows the front axle lowering process). In this embodiment, the internal gas of the high-pressure air spring is directly released to the low-pressure air storage tank 10 without passing through the compressor. This achieves an effect similar to the exhaust of an open system released to the atmosphere. The chassis lowering speed is higher than the speed of the traditional closed compressor pumping air through the air pump, and the compressor does not need to work, and no additional compressor working noise and power consumption will be generated. The specific process is as follows:

[0067] FL-left front air spring 11 and FR-right front air spring 12 flow into the low-pressure air tank 10 through the A1 air pipe and the LR solenoid valve in sequence.

[0068] 3. Rapid chassis descent mode

[0069] Reference Figure 5 When the rapid chassis descent mode does not meet the needs of the owner, we simultaneously turn on the compressor to release the high-pressure gas inside the air spring to the low-pressure gas tank and extract it to the high-pressure gas tank to achieve the rapid descent mode (only the front axle descent process is shown). The specific process is as follows:

[0070] FL-left front air spring 11 and FR-right front air spring 12 flow into the low-pressure air tank 10 through the A1 air pipe and the LR solenoid valve in sequence; in addition, the A1 air pipe passes through the RV3 solenoid valve, A3 air pipe, A5 air pipe, A2 air pipe, A4 air pipe, and RV1 solenoid valve in sequence and is connected to the high-pressure air tank 9.

[0071] 4. Process of emptying the residual gas in the low-pressure tank

[0072] Reference Figure 6Since the low-pressure tank needs to be kept close to 0 bar at all times to simulate the external atmospheric pressure of the open system, after the chassis is lowered, the compressor needs to be started as soon as possible to extract the residual gas in the low-pressure tank to the high-pressure gas storage tank to prepare for the next chassis rapid lowering condition. This process can be carried out during the operation of the vehicle to reduce the user's noise annoyance. The specific process is as follows:

[0073] The low-pressure gas storage tank 10 is connected to the high-pressure gas storage tank 9 through the LR solenoid valve, A1 gas pipe, RV3 solenoid valve, A3 gas pipe, A5 gas pipe, A2 gas pipe, A4 gas pipe and RV1 solenoid valve in sequence.

[0074] 5. Conventional chassis lifting mode

[0075] Reference Figure 7 When the pressure in the high-pressure tank is insufficient, the gas in the high-pressure tank is pumped into the air spring through the compressor to lift the front and rear axles. The specific process is as follows:

[0076] The high-pressure gas storage tank 9 passes through the RV2 solenoid valve, A3 gas pipe, A5 gas pipe, A2 gas pipe, and A1 gas pipe in sequence, and is output from the FL-left front air spring 11 and the FR-right front air spring 12.

[0077] 6. Chassis fast (quiet) lifting mode

[0078] Reference Figure 8 When the pressure in the high-pressure gas tank is high, it is recommended to use a quick lifting solution, which is similar to an open system and directly releases the gas in the high-pressure tank to the air spring. This process does not require the participation of a compressor, achieving a better and faster silent lifting effect; especially when the vehicle is stationary, this lifting strategy can meet the user's chassis lifting needs in complete silence. The specific process is as follows:

[0079] The high-pressure gas tank 9 passes through the RV2 solenoid valve, A3 air pipe, RV3 solenoid valve, A1 air pipe in sequence, and is output from the FL-left front air spring 11 and the FR-right front air spring 12.

[0080] 7. Alleviating road impact load mode

[0081] Reference Fig. 9 When the air spring encounters road impact loads such as speed bumps, potholes, etc., the internal pressure of the air spring will rise rapidly. In order to prevent excessive pressure from affecting the life of the air spring, the FL, FR, RL, RR, and LR solenoid valves have a built-in one-way conduction function. When the air spring pressure exceeds a certain set value, it is quickly released to the low-pressure tank to reduce the internal impact load of the air spring. The specific process is as follows:

[0082] The internal air pressure of FL-left front air spring 11, FR-right front air spring 12, RL-left rear air spring 13 and RR-right rear air spring 14 flows into the low-pressure air tank 10 through the A1 air pipe and the LR solenoid valve in sequence.

[0083] 8. Air spring exhaust to external environment mode

[0084] Reference Fig.10 When the vehicle needs to be repaired or undergoes some special tests, the pressure in the air spring needs to be emptied. The internal gas circuit principle is as follows: After the high-pressure gas passes through the RV4 solenoid valve, it will enter the orifice to achieve throttling and pressure reduction of the high-pressure gas, thereby ensuring the regeneration performance of the desiccant and reducing exhaust noise. The orifice is connected in parallel to the one-way valve B. The specific process is as follows:

[0085] The internal air pressure of FL-left front air spring 11, FR-right front air spring 12, RL-left rear air spring 13 and RR-right rear air spring 14 passes through A1 air pipe, A2 air pipe, orifice, A5 air pipe and A6 air pipe in sequence and is discharged from the electromagnetic exhaust valve. Fig.10 The EV is discharged at one end.

[0086] 9. High-pressure gas tank exhaust to the outside mode

[0087] Reference Fig.11 , similar to the air spring exhaust mode, here is to exhaust the high-pressure gas tank to the outside atmosphere, and still requires throttling and desiccant regeneration. The specific process is as follows:

[0088] The high-pressure gas storage tank 9 passes through the RV1 solenoid valve, A4 gas pipeline, A2 gas pipeline, orifice, A5 gas pipeline, and A6 gas pipeline in sequence, and then is discharged from the solenoid exhaust valve. Fig.11 The EV is discharged at one end.

[0089] 10. Air supply working mode

[0090] Reference Fig.12 The air supply conditions include supplying air to the high-pressure air tank and air spring. Here we only demonstrate the process of supplying air to the high-pressure tank. Fig.12 filter) into the compressor, drying barrel ( Fig.12 After entering the Dryer in the RV1 solenoid valve, it finally enters the high-pressure gas storage tank 9. The specific process is as follows:

[0091] After the air enters the air inlet 7, it passes through the A5 air pipe, the A2 air pipe, the A4 air pipe and the RV1 solenoid valve in sequence and enters the high-pressure air storage tank 9.

[0092] 11. Pressure protection (internal leakage) mode

[0093] Reference Fig.13 When the compressor outlet pressure exceeds the set value, the pressure relief valve opens and leaks internally to the pump inlet. During the internal leakage pressure protection period, the gas inside the air suspension system still remains inside.

[0094] 12. Pressure protection (external leakage) mode

[0095] Reference Fig.14 When the compressor outlet pressure exceeds the set value, the pressure relief valve opens, internal leakage to the air intake end, and external leakage leaks excess flow to the atmosphere, and the total air volume inside the compressor is reduced. The pressure relief valve is connected to the A5 air pipeline through the A7 air pipeline. The specific process is as follows:

[0096] In this mode, the high-pressure air tank 9 supplies air to the FL-left front air spring 11 and the FR-right front air spring 12, that is, the high-pressure air tank 9 passes through the RV2 solenoid valve, A3 air pipe, A5 air pipe, A2 air pipe, and A1 air pipe in sequence, and then outputs from the FL-left front air spring 11 and the FR-right front air spring 12.

[0097] Furthermore, the pressure relief valve PRV discharges the excess flow in the A5 gas pipeline into the atmosphere from the air inlet 7 after the A7 gas pipeline and the A5 gas pipeline are connected.

[0098] 13. Manual exhaust mode Maintenance mode

[0099] Reference Fig.15 If the EV valve fails, the entire system will not be able to exhaust the air to the outside, especially in special maintenance conditions, where it may be necessary to manually release the pressure in the system. The MV valve here is a manual mechanical valve that can be opened manually to release the system pressure to meet the manual exhaust requirements of test conditions or maintenance conditions. The specific process is as follows:

[0100] The internal air pressure of FL-left front air spring 11, FR-right front air spring 12, RL-left rear air spring 13 and RR-right rear air spring 14 passes through A1 air pipe, A2 air pipe, orifice, A5 air pipe, A6 air pipe in sequence and is discharged from MV pressure relief valve.

[0101] It should be noted that the specific model and specifications of the motor need to be selected and determined based on the actual specifications of the device, and the specific selection calculation method adopts the existing technology in this field, so it will not be described in detail.

[0102] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A closed air suspension compressor without an integrated controller and compatible with single and double air tanks, comprising a valve body (3) and a connector (4) mounted on a solenoid valve glue-filled sealing area (6), characterized in that: The top of the valve body (3) is provided with an air inlet (7), an air outlet (8), a high-pressure air storage tank (9), a low-pressure air storage tank (10), a FL-left front air spring (11), a FR-right front air spring (12), a RL-left rear air spring (13), a RR-right rear air spring (14) and a motor assembly (1); the side wall of the valve body (3) is provided with a cylinder (5) and a drying barrel (2).

2. A closed air suspension compressor without integrated controller and compatible with single and double air storage tanks according to claim 1, characterized in that: The valve body (3) is provided with an LR solenoid valve, an RV1 solenoid valve, an RV2 solenoid valve, an RV3 solenoid valve and an RV4 solenoid valve.

3. A closed air suspension compressor without integrated controller and compatible with single and double air tanks according to claim 2, characterized in that: The valve body (3) is provided with: A1 air supply pipe: the FL-left front air spring (11), the FR-right front air spring (12), the RL-left rear air spring (13) and the RR-right rear air spring (14) are sequentially arranged in parallel on the A1 air supply pipe.

4. A closed air suspension compressor without integrated controller and compatible with single and double air tanks according to claim 3, characterized in that: One end of the LR solenoid valve is in communication with the low-pressure gas storage tank (10), and the other end is in communication with the A1 gas delivery pipe.

5. A closed air suspension compressor without integrated controller and compatible with single and double air storage tanks according to claim 4, characterized in that: The valve body (3) is provided with: A2 gas pipe: The A2 gas pipe is arranged at one end of the RV4 solenoid valve, and the other end of the RV4 solenoid valve is connected to the A1 gas pipe.

6. A closed air suspension compressor without integrated controller and compatible with single and double air tanks according to claim 5, characterized in that: One end of the RV3 solenoid valve is connected to the A1 gas pipe, and the other end is connected to one end of the RV2 solenoid valve; The connection position between the RV3 solenoid valve and the A1 air supply pipe is located between the RL-left rear air spring (13) and the RR-right rear air spring (14) connected to the A1 air supply pipe.

7. A closed air suspension compressor without integrated controller and compatible with single and double air storage tanks according to claim 6, characterized in that: One end of the RV2 solenoid valve is connected to the high-pressure gas storage tank (9), and the other end of the RV2 solenoid valve is connected to the A3 gas supply pipe, and one end of the RV3 solenoid valve is connected to the A3 gas supply pipe.

8. A closed air suspension compressor without integrated controller and compatible with single and double air storage tanks according to claim 7, characterized in that: One end of the RV1 solenoid valve is connected to the pipeline connecting the RV2 solenoid valve and the high-pressure gas storage tank (9); the other end is connected to the A2 gas pipeline via the A4 gas pipeline.

9. A closed air suspension compressor without integrated controller and compatible with single and double air storage tanks according to claim 8, characterized in that: The A2 gas pipeline is also connected to an A5 gas pipeline, the other end of the A5 gas pipeline is connected to the air inlet (7), and the connection position between the A5 gas pipeline and the A2 gas pipeline is located downstream of the connection position between the A4 gas pipeline and the A2 gas pipeline; The A5 gas pipeline is sequentially connected to an air filter, a guide valve A, a pump, a drying barrel and a one-way valve B; The A3 air supply pipe is connected to the A5 air supply pipe, and the connection position is located between the guide valve A and the pump.

10. A closed air suspension compressor without integrated controller and compatible with single and double air tanks according to claim 9, characterized in that: The A5 gas pipe is connected in parallel with the pump to provide a pressure relief valve; The A5 gas pipeline is also connected to the A6 gas pipeline, and the A6 gas pipeline is connected to a mechanical exhaust valve and an electromagnetic exhaust valve, and the other end of the electromagnetic exhaust valve is connected to the exhaust port (8).

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