Air supply unit for air suspension

Abstract

The utility model discloses an air supply unit for an air suspension. The air supply unit comprises an air source part, an air distribution part and an air tank assembly, a plurality of first air channels and a plurality of first mounting holes are formed in the air source part; the gas tank assembly is provided with a plurality of second gas channels and a plurality of second mounting holes; the gas distribution part is provided with a plurality of front gas channels, a plurality of rear gas channels, a plurality of main mounting holes and a plurality of auxiliary mounting holes; the front air passage on the gas distribution part is directly connected with the first air passage on the gas source part, the main mounting hole on the gas distribution part is connected with the first mounting hole on the gas source part through a connecting piece, and the rear air passage on the gas distribution part is connected with the second air passage through a pipeline. According to the scheme, a split type design scheme is adopted, and arrangement is more flexible; and the air source part adopts two-stage compression and selects an opposite arrangement scheme, so that the air source part is more energy-saving and larger in displacement, and meanwhile, the compression ratio can be reduced, NVH (Noise Vibration and Harshness) is optimized, and the working stability of a product is improved.

Description

Technical Field

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

[0002] In recent years, air suspension has become increasingly popular in the passenger car market, with more models and price ranges adopting it. Currently, there is a large market demand for air suspension. Existing technical solutions on the market include open-type systems, which are noisy and energy-intensive, and closed-type systems, which have small displacement and complex structures. Summary of the Invention

[0003] The purpose of this invention is to provide an air supply unit for an air suspension system with a flexible layout.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: an air supply unit for air suspension, comprising: an air source unit, a gas distribution unit, and an air tank assembly;

[0005] The gas supply section is used to feed gas into the gas distribution section or to discharge gas from the gas distributor.

[0006] The gas distribution section is used to regulate the path of gas flow;

[0007] The gas source section is provided with a plurality of first gas channels and a plurality of first mounting holes; the gas tank assembly is provided with a plurality of second gas channels and a plurality of second mounting holes; the gas distribution section is provided with a plurality of front gas channels, a plurality of rear gas channels, a plurality of main mounting holes and a plurality of auxiliary mounting holes.

[0008] The gas distribution unit's front gas duct is directly connected to the first gas duct on the gas source unit, and the main mounting hole on the gas distribution unit is connected to the first mounting hole on the gas source unit via a connector. The rear gas duct of the gas distribution unit is connected to the second gas duct via a pipe. Alternatively, the gas distribution unit's front gas duct is directly connected to the second gas duct on the gas tank assembly, and the auxiliary mounting hole on the gas distribution unit is connected to the second mounting hole on the gas tank assembly via a connector. The front gas duct of the gas distribution unit is connected to the first gas duct via a pipe. Alternatively, the gas distribution unit, the gas source unit, and the gas tank assembly are all separately configured, and the front gas duct of the gas distribution unit is connected to the first gas duct on the gas source unit via a pipe. The rear gas duct of the gas distribution unit is connected to the second gas duct via a pipe.

[0009] In another embodiment, the gas tank assembly includes a high-pressure gas tank for storing gas pumped into the gas source or gas supplied to the air suspension, and a low-pressure gas tank for storing gas supplied from the high-pressure gas tank or the air suspension.

[0010] In another embodiment, the gas distribution unit includes a valve body, a first switching valve, a second switching valve, a third switching valve, a fourth switching valve and a fifth switching valve mounted on the valve body, an electronic controller for controlling the first switching valve, the second switching valve, the third switching valve, the fourth switching valve and the fifth switching valve, a gas pipe interface and a sensor connected to the valve body, and air spring valves respectively connected to air springs one by one.

[0011] In another embodiment, the air source unit includes a motor, a piston assembly driven by the motor, a dryer, a pilot exhaust valve, and a filter; the piston assembly includes a primary piston and a secondary piston.

[0012] In another embodiment, the flow rate of any one of the first, second, third, fourth, and fifth switching valves is at least twice that of any one of the air spring valves. The first, second, third, fourth, and fifth switching valves and the air spring valves are all solenoid valves. The fact that the flow rate of the switching valve is at least twice that of the air spring valve can reduce the throttling effect caused by their use. The materials of the switching valves and the air spring valves are preferably stainless steel.

[0013] In another embodiment, the sensor is an integrated sensor for temperature, pressure, and humidity. One end of the sensor is in contact with the ECU via a spring. The sensor indirectly feeds back the ambient temperature and the working temperature of the air source by measuring the temperature on the valve body, thus building a product temperature protection model. This model has high integration and low cost. The humidity signal can feed back the ambient humidity within the air spring system, preventing product failure caused by excessive internal humidity and reducing product quality issues.

[0014] In another embodiment, the high-pressure gas tank and the low-pressure gas tank are an integrated gas pipe, and the tank body is divided into the high-pressure gas tank and the low-pressure gas tank by a partition inside.

[0015] The beneficial effects of this utility model are as follows: This solution adopts a split design, which makes the layout more flexible; the air source section adopts a two-stage compression and selects an opposed layout, which makes the air source section more energy-efficient and has a larger displacement, while also reducing the compression ratio, optimizing NVH, and improving the product's working stability. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the air supply unit for the air suspension in Embodiment 1;

[0017] Figure 2 This is a schematic diagram of the gas distribution section in Example 1;

[0018] Figure 3 This is a schematic diagram illustrating the working principle of the air supply unit for the air suspension in Embodiment 1;

[0019] Figure 4 This is a schematic diagram of the gas tank assembly in Example 2;

[0020] Figure 5 This is a schematic diagram of the air supply unit for the air suspension in Embodiment 3. Detailed Implementation

[0021] The present invention will now be described in detail with reference to the embodiments shown in the accompanying drawings:

[0022] Example 1

[0023] The air supply unit for air suspension includes: an air source section 2, a gas distribution section 3 for regulating the gas flow path, and an air tank assembly; the air source section 2 is used to supply gas to the gas distribution section 3 or to supply gas from the gas distributor; the air tank assembly includes a high-pressure air tank for storing gas pumped into the air source section 2 or gas supplied into the air suspension, and a low-pressure air tank for storing gas supplied from the high-pressure air tank or the air suspension.

[0024] Specifically:

[0025] The gas source section 2 is provided with several first air passages and several first mounting holes; the gas tank assembly is provided with several second air passages and several second mounting holes; the gas distribution section 3 is provided with several pre-air passages, several rear air passages, several main mounting holes and several auxiliary mounting holes. The main mounting holes and several auxiliary mounting holes are threaded holes that can be adjusted according to connection needs. This is existing technology and will not be described in detail here. The gas source section 2 includes a motor 201, a piston assembly 202 driven by the motor 201, a dryer 203, a pilot exhaust valve 204, and a filter. The piston assembly 202 includes a primary piston and a secondary piston. The first air passage is the outlet of the dryer 203; the second air passage is the interface between the high-pressure gas tank and the low-pressure gas tank.

[0026] The gas distribution unit 3 has a pre-air passage directly connected to the first air passage on the gas source unit 2, and a main mounting hole on the gas distribution unit 3 is connected to the first mounting hole on the gas source unit 2 through a connector. The gas distribution unit 3 has a rear air passage connected to the second air passage through a pipe. The gas distribution unit 3 includes a valve body 301, a first switching valve, a second switching valve, a third switching valve, a fourth switching valve and a fifth switching valve mounted on the valve body 301, an electronic controller 302 for controlling the first switching valve, the second switching valve, the third switching valve, the fourth switching valve and the fifth switching valve, an air pipe interface 303 and a sensor 305 connected to the valve body 301, and air spring valves 101 that are respectively connected to the air springs 102 one by one. All switching valves are equipped with A / B interfaces. The B interface of the first switching valve is connected to each air spring valve 101, and its A interface is connected to the air outlet of the dryer 203 (i.e., the first air passage). The B interface of the second switching valve is connected to each air spring valve 101, and its A interface is connected to the B interface of the fifth switching valve. The A interface of the third switching valve is connected to the A interface of the fifth switching valve and together they are connected to the compression chamber where the second piston is located. The A interface of the third switching valve 106 is connected to the interface of the high-pressure gas tank 4. The B interface of the fourth switching valve 107 is connected to the interface of the high-pressure gas tank 4. The B interface of the fourth switching valve 107 is connected to the air outlet of the dryer 203 (i.e., the first air passage) and the A interface of the first switching valve 104. The interface of the low-pressure gas tank 5 is connected between the A interface of the second switching valve 105 and the B interface of the fifth switching valve 108. The A ports of the fourth switching valve 107 and the fifth switching valve 108 are pre-air passages, while the B ports of the first switching valve 104 and the second switching valve 105 are post-air passages.

[0027] The first switching valve 104, the second switching valve 105, the third switching valve 106, the fourth switching valve 107, the fifth switching valve 108, and the air spring valve 101 are all solenoid valves. To reduce the throttling effect caused by their use, the flow rate of any one of the first switching valves 104, the second switching valve 105, the third switching valve 106, the fourth switching valve 107, and the fifth switching valve 108 is at least twice that of any one of the air spring valves 101. The materials of the switching valves and the air spring valve 101 are preferably stainless steel.

[0028] Sensor 305 is an integrated sensor for temperature, pressure, and humidity. One end of sensor 305 is in contact with the ECU via a spring. Sensor 305 indirectly feeds back the ambient temperature and the operating temperature of the air source unit 2 by measuring the temperature on the valve body 301, thus building a product temperature protection model. It has high integration and low cost. The humidity signal can feed back the ambient humidity in the air spring 102 system, preventing product failure caused by excessive internal humidity and reducing product quality problems.

[0029] The low-pressure air tank 5 is used to absorb gas from the air spring 102 when the vehicle body is lowered, and the high-pressure air tank 4 is used to replenish the gas in the air spring 102 when the vehicle body is raised. When the vehicle air spring 102 system is raised or lowered, the air source unit 2 does not intervene to improve the adjustment speed and comfort. During subsequent vehicle operation, the air volume of the two high-pressure air tanks 4 and the low-pressure air tank 5 is adjusted by the air source unit 2 for the next adjustment.

[0030] When the air spring 102 is lowered, the air spring valve 101 and the second switching valve 105 open. High-pressure gas inside the air spring 102 passes through the air spring valve 101 and the second switching valve 105 sequentially into the low-pressure gas tank 5, causing the vehicle body to descend. Alternatively, when the air spring 102 is lowered, the air spring 102 opens, the first switching valve 104 opens, and the fourth switching valve 107 opens. High-pressure gas inside the high-pressure gas tank 4 passes through the fourth switching valve 107, the first switching valve 104, and the air spring valve 101 sequentially into the air spring 102.

[0031] The pressures of the low-pressure gas tank 5 and the high-pressure gas tank 4 can be freely adjusted. Gas from the low-pressure gas tank 5 can be pressurized by the fifth switching valve 108 and the second piston 109, and then enter the high-pressure gas tank 4 through the fourth switching valve 107. Gas from the high-pressure gas tank 4 can enter the low-pressure gas tank 5 sequentially through the third switching valve 106 and the fifth switching valve 108.

[0032] It can actively regenerate the desiccant. When the pilot exhaust valve 204204 is opened, the gas from the high-pressure gas tank 4 flows through the dryer 203203 into the atmosphere, carrying out the water molecules in the desiccant and realizing the active regeneration of the desiccant. It can also actively replenish gas. When the fourth switching valve 107 is opened, the atmosphere passes through the filter 111, the first piston 110 and the second piston 109 are pressurized, and the high-pressure gas passes through the dryer 203203 and enters the high-pressure gas tank 4 through the fourth switching valve 107 to complete the replenishment.

[0033] Example 2

[0034] In this embodiment, the high-pressure gas tank 4 and the low-pressure gas tank 5 are integrated gas pipes, with an internal partition separating the tank body into the high-pressure gas tank 4 and the low-pressure gas tank 5. Furthermore, the pre-air passage on the gas distribution section 3 is directly connected to the second air passage on the gas tank assembly, and the auxiliary mounting hole on the gas distribution section 3 is connected to the second mounting hole on the gas tank assembly via a connector. The pre-air passage of the gas distribution section 3 is connected to the first air passage via a pipe. Compared to two separate gas storage tanks, this design reduces space, is integrally formed, and lowers costs.

[0035] Example 3

[0036] The difference between this embodiment and Embodiment 1 is that the high-pressure gas tank 4 and the low-pressure gas tank 5 are separate units; the front air passage on the gas distribution unit 3 is directly connected to the second air passage on the gas tank assembly, the auxiliary mounting hole on the gas distribution unit 3 is connected to the second mounting hole on the gas tank assembly via a connector, and the front air passage of the gas distribution unit 3 is connected to the first air passage via a pipe. This reduces the number of fixed locations on the vehicle, allows for a more flexible layout, and if there is enough space, the gas source unit 2 can be fixed to the gas tank as well, resulting in a more centralized layout and simpler installation.

[0037] Alternatively, the gas distribution unit 3, the gas source unit 2, and the gas tank assembly can all be set separately, with the front gas channel on the gas distribution unit 3 connected to the first gas channel on the gas source unit 2 via a pipe, and the rear gas channel on the gas distribution unit 3 connected to the second gas channel via a pipe. This will not be elaborated here.

[0038] 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 supply unit for an air suspension system, comprising: Gas source section, gas distribution section, gas tank assembly; The gas supply section is used to feed gas into the gas distribution section or to discharge gas from the gas distributor. The gas distribution section is used to regulate the path of gas flow; The gas source unit is characterized by having a plurality of first air passages and a plurality of first mounting holes; the gas tank assembly is characterized by having a plurality of second air passages and a plurality of second mounting holes; and the gas distribution unit is characterized by having a plurality of front air passages, a plurality of rear air passages, a plurality of main mounting holes and a plurality of auxiliary mounting holes. The gas distribution unit's front gas duct is directly connected to the first gas duct on the gas source unit, and the main mounting hole on the gas distribution unit is connected to the first mounting hole on the gas source unit via a connector. The rear gas duct of the gas distribution unit is connected to the second gas duct via a pipe. Alternatively, the gas distribution unit's front gas duct is directly connected to the second gas duct on the gas tank assembly, and the auxiliary mounting hole on the gas distribution unit is connected to the second mounting hole on the gas tank assembly via a connector. The front gas duct of the gas distribution unit is connected to the first gas duct via a pipe. Alternatively, the gas distribution unit, the gas source unit, and the gas tank assembly are all separately configured, and the front gas duct of the gas distribution unit is connected to the first gas duct on the gas source unit via a pipe. The rear gas duct of the gas distribution unit is connected to the second gas duct via a pipe.

2. The air supply unit for air suspension according to claim 1, characterized in that: The gas tank assembly includes a high-pressure gas tank for storing gas pumped into the gas source or gas supplied to the air suspension, and a low-pressure gas tank for storing gas supplied from the high-pressure gas tank or the air suspension.

3. The air supply unit for air suspension according to claim 2, characterized in that: The gas distribution unit includes a valve body, a first switching valve, a second switching valve, a third switching valve, a fourth switching valve and a fifth switching valve installed on the valve body, an electronic controller for controlling the first switching valve, the second switching valve, the third switching valve, the fourth switching valve and the fifth switching valve, a gas pipe interface and a sensor connected to the valve body, and air spring valves respectively connected to air springs one by one.

4. The air supply unit for air suspension according to claim 3, characterized in that: The air source unit includes a motor, a piston assembly driven by the motor, a dryer, a pilot exhaust valve, and a filter; the piston assembly includes a primary piston and a secondary piston.

5. The air supply unit for air suspension according to claim 4, characterized in that: The flow rate of any one of the first, second, third, fourth, and fifth switching valves is at least twice that of any one of the air spring valves. All of the first, second, third, fourth, and fifth switching valves and the air spring valve are solenoid valves.

6. The air supply unit for air suspension according to claim 3, characterized in that: The sensor is an integrated sensor for temperature, pressure, and humidity.

7. The air supply unit for air suspension according to claim 2, characterized in that: The high-pressure gas tank and the low-pressure gas tank are integrated into a single gas pipe, and the tank body is divided into the high-pressure gas tank and the low-pressure gas tank by a partition inside.

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