Air supply output device of air suspension

Abstract

The utility model discloses an air suspension air supply output device which comprises an air compressor, a high-pressure air storage tank, a low-pressure air storage tank, an air spring, a valve block, a first switching valve, a second switching valve, a third switching valve, a fourth switching valve, a fifth switching valve, a sixth switching valve and an exhaust valve. The control unit is used for controlling the air compressor and all the valves to cooperatively act; each air spring is provided with an air spring valve; the air compressor is provided with an air compressor air inlet and outlet opening, an air compressor air outlet, a first-stage piston air outlet and a second-stage piston air inlet. The sixth switching valve, the low-pressure air storage tank and the first switching valve are sequentially connected between the air inlet of the second-stage piston and the air spring, and the sixth switching valve is located between the air inlet of the second-stage piston and the low-pressure air storage tank; through cooperation of the switching valve and the air spring valve, various air spring adjusting modes can be achieved, a system air path does not exchange air with the outside under the normal condition, the starting frequency of the air compressor is reduced, and the requirement for the service life of the air compressor is greatly lowered; and meanwhile, due to internal circulation, interaction with outside air is less, and the influence of severe external conditions on system operation is reduced.

Description

Technical Field

[0001] This utility model belongs to the field of air spring accessories, and specifically relates to an air suspension air supply output device. Background Technology

[0002] With the increasing popularity of new energy vehicles, people have higher and higher requirements for vehicle comfort and suspension technology, making air suspension an indispensable part. The air supply unit, as the core component of the air suspension system, provides the power source for adjusting the stiffness and damping of the air suspension. Currently, the air supply units for automotive air suspensions on the domestic market are mainly open systems. Open systems require frequent and prolonged operation of the air compressor to compress outside air to a high pressure in a short time to achieve the function of raising the vehicle body, which places high demands on the lifespan of the air compressor. Furthermore, the air passages of open systems are exposed to the outside environment, making them susceptible to harsh external conditions. Open systems also have high motor power and high operating noise, affecting passenger comfort. Therefore, many air suspension systems have adopted closed-loop air supply methods. However, the existing closed-loop systems have relatively simple air supply methods, resulting in limitations in the adjustment methods of the air springs. Improving the diversity of air spring adjustment methods is an urgent problem to be solved. Summary of the Invention

[0003] The purpose of this invention is to provide an air suspension air supply output device, which achieves a variety of air spring adjustment methods through the cooperation of a switching valve and an air spring valve.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: an air suspension air supply output device, comprising an air compressor, a high-pressure air tank, a low-pressure air tank, air springs, a valve block, a first switching valve, a second switching valve, a third switching valve, a fourth switching valve, a fifth switching valve, and a sixth switching valve installed on the valve block, an exhaust valve, and a control unit for controlling the coordinated operation of the air compressor and each valve; each air spring is provided with an air spring valve;

[0005] The air compressor is equipped with an air compressor inlet and outlet, an air compressor outlet, a first-stage piston outlet, and a second-stage piston inlet.

[0006] The sixth switching valve, the low-pressure gas storage tank, and the first switching valve are sequentially connected between the secondary piston inlet and the air spring, with the sixth switching valve located between the secondary piston inlet and the low-pressure gas storage tank.

[0007] The fourth switching valve, the third switching valve, and the fifth switching valve are sequentially connected between the air compressor outlet and the first-stage piston outlet. The fourth switching valve is located between the air compressor outlet and the third switching valve. The pipeline between the third switching valve and the fifth switching valve is connected to the pipeline between the second-stage piston inlet and the sixth switching valve. The second switching valve is connected between the air spring and the fourth switching valve, and the connection end of the second switching valve and the fourth switching valve is located between the air compressor outlet and the fourth switching valve.

[0008] In another embodiment, the exhaust valve is connected to the air outlet of the air compressor to prevent excessive internal pressure in the air compressor.

[0009] In another embodiment, the air suspension air supply output device includes a filter, the exhaust valve and the air compressor inlet and outlet are connected to the filter, and the exhaust valve is connected between the air compressor outlet and the filter.

[0010] In another embodiment, the exhaust valve is provided with a pilot valve, which is connected to the filter.

[0011] In another embodiment, the air suspension air supply output device includes a dryer, which is connected between the connection point of the exhaust valve and the fourth switching valve and the air outlet of the air compressor. The exhaust valve can also prevent excessive internal pressure in the air spring and the high-pressure air tank.

[0012] In another embodiment, the air springs include a first air spring, a second air spring, a third air spring, and a fourth air spring.

[0013] In another embodiment, the air spring valves on the first air spring, the second air spring, the third air spring, and the fourth air spring are respectively the first air spring valve, the second air spring valve, the third air spring valve, and the fourth air spring valve, and the first air spring valve, the second air spring valve, the third air spring valve, and the fourth air spring valve are all connected to the first switching valve and the second switching valve.

[0014] In another embodiment, the first air spring valve, the second air spring valve, the third air spring valve, and the fourth air spring valve are all two-position two-way solenoid valves.

[0015] In another embodiment, the first switching valve, the second switching valve, the third switching valve, the fourth switching valve, the fifth switching valve, and the sixth switching valve are all two-position two-way solenoid valves.

[0016] In another embodiment, the exhaust valve is a two-position two-way solenoid valve.

[0017] The beneficial effects of this utility model are as follows: by cooperating with the switching valve and the air spring valve, multiple air spring adjustment methods can be realized, and the system air circuit does not usually interact with the outside air, reducing the number of times the air compressor is started and greatly reducing the life requirements of the air compressor; at the same time, since it is an internal circulation, there is less interaction with the outside air, reducing the impact of harsh external conditions on the system operation. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of this utility model;

[0019] Figure 2 This is a schematic diagram of airflow in working condition one (where the dashed line represents the gas flow path).

[0020] Figure 3 This is a schematic diagram of airflow in working condition 2 (where the dashed line represents the gas flow path).

[0021] Figure 4 This is a schematic diagram of airflow under operating condition 3 (where the dashed line represents the gas flow path).

[0022] Figure 5 This is a schematic diagram of airflow under operating condition 4 (where the dashed lines represent gas flow paths).

[0023] Figure 6 This is a schematic diagram of airflow under operating condition 5 (where the dashed lines represent gas flow paths).

[0024] Figure 7 This is a schematic diagram of airflow in working condition 6 (where the dashed lines represent gas flow paths).

[0025] Figure 8 This is a schematic diagram of airflow in working condition 7 (where the dashed line represents the gas flow path).

[0026] Figure 9 This is a schematic diagram of airflow under working condition 8 (where the dashed line represents the gas flow path).

[0027] Figure 10 This is a schematic diagram of the valve block;

[0028] Figure 11 This is a schematic diagram showing the installation of the control unit on the valve block;

[0029] Figure 12 This is a schematic diagram of an air compressor. Detailed Implementation

[0030] The present invention will now be described in detail with reference to the embodiments shown in the accompanying drawings:

[0031] like Figure 1 , 10As shown in Figure 11, the air suspension air supply output device includes an air compressor CM, a high-pressure air tank H, a low-pressure air tank L, air springs, a valve block 40, a first switching valve SV1, a second switching valve SV2, a third switching valve SV3, a fourth switching valve SV4, a fifth switching valve SV5, and a sixth switching valve SV6 mounted on the valve block, air spring valves respectively located on each air spring, a dryer AD, an exhaust valve EV, a pilot valve PV located on the exhaust valve EV, a filter AF, and a control unit 160 for controlling the coordinated operation of the air compressor CM and each valve; the air springs include a first air spring AS1, a second air spring AS2, a third air spring AS3, and a fourth air spring AS4. The air spring valves on the first air spring AS1, the second air spring AS2, the third air spring AS3, and the fourth air spring AS4 are respectively the first air spring valve AV1, the second air spring valve AV2, the third air spring valve AV3, and the fourth air spring valve AV4. The first air spring valve AV1, the second air spring valve AV2, the third air spring valve AV3, and the fourth air spring valve AV4 are all connected to the first switching valve SV1 and the second switching valve SV2.

[0032] like Figure 12 As shown, the air compressor CM is equipped with an air compressor inlet / outlet K1, an air compressor outlet K2, a first-stage piston outlet K3, and a second-stage piston inlet K4. A sixth switching valve SV6, a low-pressure air tank L, and a first switching valve SV1 are sequentially connected between the second-stage piston inlet K4 and the air spring. The sixth switching valve SV6 is located between the second-stage piston inlet K4 and the low-pressure air tank L. A fourth switching valve SV4, a third switching valve SV3, and a fifth switching valve SV5 are sequentially connected between the air compressor outlet K2 and the first-stage piston outlet K3. The fourth switching valve SV4 is located between the air compressor outlet K2 and the third switching valve SV3. The pipeline between the third switching valve SV3 and the fifth switching valve SV5 is connected to the pipeline between the second-stage piston inlet K4 and the sixth switching valve SV6. A second switching valve SV2 is connected between the air spring and the fourth switching valve SV4, and the connection end between the second switching valve SV2 and the fourth switching valve SV4 is located between the air compressor outlet K2 and the fourth switching valve SV4.

[0033] The exhaust valve EV is connected to the air compressor outlet K2 to prevent excessive internal pressure in the air compressor. The exhaust valve EV and the air compressor inlet / outlet K1 are connected to the filter AF, which is connected to the atmosphere. The exhaust valve EV is connected between the air compressor outlet K2 and the filter AF. The pilot valve PV is connected to the filter AF. The dryer AD is connected between the exhaust valve EV and the fourth switching valve SV4 at the connection point with the air compressor outlet K2. The exhaust valve EV also prevents excessive internal pressure in the air spring and high-pressure air tank H.

[0034] The first air spring valve AV1, the second air spring valve AV2, the third air spring valve AV3, the fourth air spring valve AV4, the first switching valve SV1, the second switching valve SV2, the third switching valve SV3, the fourth switching valve SV4, the fifth switching valve SV5, the sixth switching valve SV6, and the exhaust valve EV are all two-position two-way solenoid valves.

[0035] This utility model can have the following eight working conditions:

[0036] Operating Condition 1: Atmosphere → Air Compressor → High-Pressure Air Tank

[0037] When the pressure in the high-pressure air tank is insufficient, the compressor is started, and the fourth reversing valve SV4 and the fifth reversing valve SV5 are opened, while all other valves are closed. The air compressor draws air from the atmosphere, generates high-pressure gas through two-stage piston compression technology, and delivers it to the high-pressure air tank for storage. See the schematic diagram for details. Figure 2 The valve is in either open or closed state.

[0038] Operating Condition 2: High-Pressure Air Tank → Air Spring

[0039] When the vehicle body needs to be raised, the second reversing valve SV2, the fourth reversing valve SV4, the first air spring valve AV1, the second air spring valve AV2, the third air spring valve AV3, and the fourth air spring valve AV4 must be opened, while all other valves are closed. High-pressure gas from the high-pressure gas tank is pumped into the four air springs. See the schematic diagram for details. Figure 3 .

[0040] Operating Condition 3: Air Spring → Low-Pressure Gas Tank

[0041] When the vehicle body needs to be lowered, the first reversing valve SV1, the first air spring valve AV1, the second air spring valve AV2, the third air spring valve AV3, and the fourth air spring valve AV4 must be opened, while all other valves are closed. The high-pressure gas in the four air springs is pumped into the low-pressure gas tank. See the schematic diagram for details. Figure 4 .

[0042] Operating Condition 4 (Boost): Low-pressure air tank → Air compressor → High-pressure air tank

[0043] When the pressure in the high-pressure gas tank is insufficient, start the compressor and open the fourth reversing valve SV4 and the sixth reversing valve SV6, while closing all other valves. The low-pressure gas in the low-pressure gas tank can then be used as the compressor's gas source, entering the compressor's secondary compression chamber for pressurization to form high-pressure gas, which is ultimately stored in the high-pressure gas tank. See the schematic diagram for details. Figure 5 .

[0044] Operating Condition 5 (Boosting): Air spring → Low-pressure air tank → Air compressor → High-pressure air tank

[0045] When the vehicle body needs to be lowered, and the pressure difference between the air springs and the low-pressure air tank is too small, the air compressor is started, and the first reversing valve SV1, the fourth reversing valve SV4, the sixth reversing valve SV6, the first air spring valve AV1, the second air spring valve AV2, the third air spring valve AV3, and the fourth air spring valve AV4 are opened. All other valves are closed. The gas in the low-pressure air tank and the four air springs serves as the air source for the compressor, entering the compressor's secondary compression chamber for pressurization to form high-pressure gas, which is then finally stored in the high-pressure air tank. See the schematic diagram for details. Figure 6 .

[0046] Operating Condition 6 (Boosting): High-pressure air tank → Air compressor → Air spring

[0047] When the vehicle body needs to be raised quickly, start the air compressor and open the second reversing valve SV2, the third reversing valve SV3, the first air spring valve AV1, the second air spring valve AV2, the third air spring valve AV3, and the fourth air spring valve AV4. All other valves are closed. The gas in the high-pressure air tank serves as the compressor's air source, entering the compressor's secondary compression chamber for pressurization. This high-pressure gas is then pumped into the four air springs. See the schematic diagram for details. Figure 7 .

[0048] Operating Condition 7: Air Spring → Air Compressor (Desiccant Backflushing) → Atmosphere

[0049] When the vehicle body needs to be lowered, and the desiccant inside the compressor also needs performance regeneration, the first reversing valve SV1, the first air spring valve AV1, the second air spring valve AV2, the third air spring valve AV3, the fourth air spring valve AV4, and the exhaust valve EV are opened, while all other valves are closed. The gas in the air springs passes through the desiccant, carrying away some moisture, and is then discharged into the atmosphere. See the schematic diagram for details. Figure 8 .

[0050] Operating Condition 8: High-pressure air tank → air compressor (desiccant backflushing) → atmosphere

[0051] When the vehicle body does not need to be lowered, and the desiccant inside the compressor also needs performance regeneration, the fourth reversing valve SV4 and the EV exhaust valve are opened, while all other valves are closed. The gas in the high-pressure gas tank passes through the desiccant, carrying away some moisture, and is then released into the atmosphere. See the schematic diagram for details. Figure 9 .

[0052] The above embodiments are only for illustrating the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be construed as limiting the scope of protection of this utility model. All equivalent changes or modifications made in accordance with the spirit of this utility model should be included within the scope of protection of this utility model.

Claims

1. An air suspension air supply output device, comprising a compressor (CM), a high-pressure air tank (H), a low-pressure air tank (L), air springs, a valve block (40), a first switching valve (SV1), a second switching valve (SV2), a third switching valve (SV3), a fourth switching valve (SV4), a fifth switching valve (SV5) and a sixth switching valve (SV6) mounted on the valve block, an exhaust valve (EV), and a control unit (160) for controlling the compressor (CM) and the valves; each air spring is provided with an air spring valve; characterized in that: the compressor (CM) is provided with a compressor air inlet and exhaust port (K1), a compressor air outlet (K2), a first-stage piston air outlet (K3), and a second-stage piston air inlet (K4); the sixth switching valve (SV6), the low-pressure air tank (L) and the first switching valve (SV1) are connected in sequence between the second-stage piston air inlet (K4) and the air springs, and the sixth switching valve (SV6) is located between the second-stage piston air inlet (K4) and the low-pressure air tank (L); the fourth switching valve (SV4), the third switching valve (SV3) and the fifth switching valve (SV5) are connected in sequence between the compressor air outlet (K2) and the first-stage piston air outlet (K3), the fourth switching valve (SV4) is located between the compressor air outlet (K2) and the third switching valve (SV3), the pipeline between the third switching valve (SV3) and the fifth switching valve (SV5) is communicated with the pipeline between the second-stage piston air inlet (K4) and the sixth switching valve (SV6), and the second switching valve (SV2) is connected between the air springs and the fourth switching valve (SV4), and the connection end of the second switching valve (SV2) and the fourth switching valve (SV4) is located between the compressor air outlet (K2) and the fourth switching valve (SV4); the exhaust valve (EV) is connected to the compressor air outlet (K2); the air suspension air supply output device comprises a filter (AF), the exhaust valve (EV) and the compressor air inlet and exhaust port (K1) are connected to the filter (AF), and the exhaust valve (EV) is connected between the compressor air outlet (K2) and the filter (AF); the exhaust valve (EV) is provided with a pilot valve (PV), and the pilot valve (PV) is connected to the filter (AF); the air suspension air supply output device comprises a dryer (AD), and the dryer (AD) is connected between the connection point of the exhaust valve (EV) and the fourth switching valve (SV4) and the compressor air outlet (K2); the air springs comprise a first air spring (AS1), a second air spring (AS2), a third air spring (AS3) and a fourth air spring (AS4). ​ ​ ​ 2. The air suspension air supply outlet apparatus according to claim 1, characterized by: ​ 3. The air suspension air supply outlet apparatus according to claim 2, characterized by: ​ 4. The air suspension air supply outlet apparatus according to claim 3, characterized by: ​ 5. The air suspension air supply outlet apparatus according to claim 2, characterized by: ​ 6. The air suspension air supply outlet apparatus according to claim 1, characterized by: ​ 7. The air suspension air supply outlet apparatus according to claim 6, characterized by: The air spring valves on the first air spring (AS1), the second air spring (AS2), the third air spring (AS3), and the fourth air spring (AS4) are respectively a first air spring valve (AV1), a second air spring valve (AV2), a third air spring valve (AV3), and a fourth air spring valve (AV4), and the first air spring valve (AV1), the second air spring valve (AV2), the third air spring valve (AV3), and the fourth air spring valve (AV4) are all connected to the first switching valve (SV1) and the second switching valve (SV2).

8. The air suspension air supply outlet apparatus according to claim 7, characterized by: The first air spring valve (AV1), the second air spring valve (AV2), the third air spring valve (AV3), and the fourth air spring valve (AV4) are all two-position two-way electromagnetic valves.

9. The air suspension air supply outlet apparatus according to claim 1, characterized by: The first switching valve (SV1), the second switching valve (SV2), the third switching valve (SV3), the fourth switching valve (SV4), the fifth switching valve (SV5), and the sixth switching valve (SV6) are all two-position two-way electromagnetic valves.

10. The air suspension air supply outlet apparatus according to claim 1, characterized by: The exhaust valve (EV) is a two-position two-way electromagnetic valve.

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