Durability test bench for air suspension ASU

Abstract

The utility model relates to the technical field of air suspension durability testing, in particular to a durability test bench for an air suspension ASU. The test bench comprises an electrical cabinet and an environmental box, and further comprises a heat dissipation device, a temperature sensor, an upper computer and a test gas circuit. The environment box is internally provided with a plurality of test positions used for installing tested products, each test position is provided with a heat dissipation device and a temperature sensor, and the temperature sensors are used for being fixed on the tested products to obtain temperature information of the tested products; the heat dissipation equipment and the temperature sensor are in signal connection with the upper computer; the tested product is connected with a factory gas source through the test gas circuit. According to the utility model, the heat dissipation device is arranged on the test position, so that the tested product can be timely cooled, the test duty ratio is shortened, and the technical problem that the single test time is too long because the ASU device has a thermal protection mechanism and the duty ratio needs to be dynamically adjusted by the durability test stand during the durability test in the prior art is effectively solved.

Description

A durability testing bench for air suspension ASU Technical Field

[0001] This utility model relates to the field of air suspension durability testing technology, and in particular to a durability testing bench for air suspension ASU. Background Technology

[0002] Air suspension is a suspension system that uses an air compressor to generate compressed air. By controlling the corresponding air compressor and exhaust valve according to changes in vehicle height, it inflates or deflates the airbags, thereby raising or lowering the ground clearance of the vehicle chassis to increase high-speed vehicle stability or improve the ability to pass through complex road conditions.

[0003] Air suspension ASUs (Air Supply Unit Assemblies) require durability testing during the design phase to identify potential design flaws and manufacturing issues early on. This allows designers to improve the product based on the discovered defects and problems, thereby enhancing the quality and reliability of the ASU. For example, patent document CN113588225B discloses a durability testing method, system, and apparatus for air compressors. This apparatus includes a DC power supply, an air compressor, a solenoid main valve, a relay, a first air tank, a second air tank, and a test host computer. The air compressor is equipped with a pressure relief valve, a pressure boosting valve, and a temperature sensor. The solenoid main valve is equipped with an air bladder valve, an air tank valve, and a pressure sensor. The test host computer is connected to the air compressor, the solenoid main valve, and the relay, and can test the durability of the air compressor's pressure boosting valve.

[0004] However, existing durability testing benches for air suspension (ASU) have the following problems when in use: 1. Different companies have different design standards and definitions of test parameters for durability testing benches, and the durability testing benches used by different companies have differences in accuracy, stability and function, resulting in a lack of comparability of test results; 2. The tested products have thermal protection mechanisms, and existing durability testing benches need to dynamically adjust the duty cycle of the equipment during testing to avoid thermal failure, which leads to a significant increase in the time required for a single test. Summary of the Invention

[0005] This utility model provides a durability testing bench for air suspension (ASU) to solve the technical problem that in the prior art, ASU equipment has a thermal protection mechanism, and the durability testing bench needs to dynamically adjust the duty cycle during durability testing, resulting in excessively long test times per test.

[0006] To solve the above problems, the durability testing bench for air suspension ASU provided by this utility model adopts the following technical solution:

[0007] A durability test bench for air suspension ASU includes an electrical cabinet and an environmental chamber, as well as heat dissipation equipment, temperature sensors, a host computer, and test air circuits;

[0008] The environmental chamber has multiple test positions for installing the product under test. Each test position is equipped with a heat dissipation device and a temperature sensor. The temperature sensor is fixed on the product under test to obtain the temperature information of the product under test.

[0009] The heat dissipation device and the temperature sensor are connected to the host computer via signal transmission.

[0010] The product under test is connected to the factory gas source through the test gas path.

[0011] The beneficial effects of the air suspension ASU durability testing bench provided by this utility model are as follows: by setting heat dissipation equipment at each test position and fixing temperature sensors on the product under test, and connecting the heat dissipation equipment and temperature sensors to the host computer, the temperature information of the product under test can be monitored in real time through the temperature sensors, and the monitored temperature information can be transmitted to the host computer. The host computer controls the operation of the heat dissipation equipment according to the received temperature information, thereby performing forced cooling treatment on the product under test in a timely manner, avoiding triggering the thermal protection mechanism, shortening the test duty cycle, and ultimately shortening the durability testing period.

[0012] Through the above-mentioned design, this utility model effectively solves the technical problem in the prior art that ASU equipment has a thermal protection mechanism, and the durability test bench needs to dynamically adjust the duty cycle during durability testing, resulting in excessively long test times per test.

[0013] Furthermore, a mounting bracket is provided above the test position, and the heat dissipation device is fixedly mounted on the mounting bracket.

[0014] Furthermore, the mounting bracket includes a first mounting plate and a second mounting plate. One end of the first mounting plate is connected to the body of the environmental chamber, and the top end of the second mounting plate is connected to the first mounting plate. The heat dissipation device is mounted on the second mounting plate.

[0015] Furthermore, the second mounting plate is connected to one end of the first mounting plate away from the body of the environmental chamber or to the side of the first mounting plate.

[0016] Furthermore, the heat dissipation device is a cooling fan.

[0017] Furthermore, the temperature sensor is a surface-mount temperature sensor.

[0018] Furthermore, the test gas path includes a gas storage tank, one end of which is connected to the outlet of the product under test installed in the environmental chamber, and the other end is connected to the factory gas source. The gas storage tank is also connected to a pressure sensor, a control valve, and a safety valve, and the outlet of the product under test is also equipped with a control valve.

[0019] Furthermore, all control valves located within the environmental chamber are pneumatic valves.

[0020] Beneficial effects: By setting the control valve in the environmental chamber as a pneumatic valve, which can withstand high and low temperatures, the stable operation of the test gas circuit can be effectively guaranteed.

[0021] Furthermore, all control valves located outside the environmental chamber are solenoid valves.

[0022] Furthermore, the test gas path is a parallel gas path, which includes a first branch gas path and a second branch gas path. The first branch gas path has two gas storage tanks connected in series, and the second branch gas path has one gas storage tank. Each gas storage tank is connected to a pressure sensor, a control valve, and a safety valve. Attached Figure Description

[0023] The above and other objects, features, and advantages of the present invention will become readily understood by reading the following detailed description of exemplary embodiments with reference to the accompanying drawings. In the drawings, several embodiments of the present invention are shown by way of example and not limitation, and like or corresponding reference numerals denote like or corresponding parts, wherein:

[0024] Figure 1 is a structural schematic diagram of the air suspension ASU durability test bench provided by this utility model;

[0025] Figure 2 is a schematic diagram of the installation of the heat dissipation device in the durability test bench for air suspension ASU provided by this utility model;

[0026] Figure 3 is a schematic diagram of the test air path of the durability test bench for air suspension ASU provided by this utility model.

[0027] Explanation of reference numerals in the attached figures:

[0028] 1. First electrical cabinet; 2. Second electrical cabinet; 3. Environmental chamber; 4. Variable speed cooling fan; 5. First mounting plate; 6. Second mounting plate; 7. Gas tank; 8. Product under test; 9. Pressure sensor; 10. Solenoid valve; 11. Safety valve. Detailed Implementation

[0029] The principles and spirit of this utility model will be explained in detail below with reference to several representative embodiments.

[0030] An embodiment of the air suspension ASU durability testing bench provided by this utility model:

[0031] As shown in Figures 1 to 3, the durability test bench for air suspension ASU includes a first electrical cabinet 1, an environmental chamber 3, a second electrical cabinet 2, a heat dissipation device, a temperature sensor, a host computer, and a test air circuit. The first electrical cabinet 1, environmental chamber 3, and second electrical cabinet 2 are arranged sequentially from left to right. The heat dissipation device and temperature sensor are both connected to the host computer. The environmental chamber 3 has a high and low temperature humidity alternating system and a simulated air spring assembly system. The host computer includes a computer control system, a sensor system, a data acquisition module, a storage system, and an electronic control unit (ECU).

[0032] Regarding the heat dissipation equipment and temperature sensors: The environmental chamber 3 has multiple test positions for mounting the product under test 8. Each test position is equipped with a heat dissipation device and a temperature sensor. The temperature sensor is fixed to the product under test 8 to obtain the temperature information of the product under test 8 and transmit it to the host computer. The host computer controls the operation of the heat dissipation equipment to cool down the product under test 8, thereby reducing the duty cycle.

[0033] Specifically, as shown in Figure 2, a mounting bracket is provided above the test position, and the heat dissipation device is fixedly mounted on the mounting bracket. In this embodiment, the mounting bracket includes a first mounting plate 5 and a second mounting plate 6. One end of the first mounting plate 5 is connected to the inner wall of the environmental chamber 3, and the other end is connected to the top of the second mounting plate 6. The heat dissipation device is mounted on the second mounting plate 6. Specifically, the second mounting plate 6 extends obliquely from top to bottom, and the angle between it and the first mounting plate 5 is a right angle or an obtuse angle to ensure the heat dissipation area. In other embodiments, the second mounting plate 6 is mounted on the side of the first mounting plate 5, only requiring that the heat dissipation device mounted on the second mounting plate 5 can dissipate heat to the product under test 8.

[0034] In this embodiment, the heat dissipation device is a cooling fan 4, and the temperature sensor is a surface-mount temperature sensor.

[0035] Regarding the test gas path: As shown in Figure 3, in this embodiment, the test gas path is a parallel gas path, which includes a first branch gas path and a second branch gas path. The first branch gas path has two gas storage tanks 7 connected in series, and the second branch gas path has one gas storage tank 7. Each gas storage tank 7 is connected to a pressure sensor 9, a control valve, and a safety valve 11. The left gas storage tank 7 in the first branch gas path is connected to the outlet of the product under test 8 installed in the environmental chamber 3, and the right gas storage tank 7 is connected to the factory gas source. One end of the gas storage tank 7 in the second branch gas path is connected to the outlet of the product under test 8, and the other end is connected to the factory gas source. In addition, a control valve is also provided at the outlet of the product under test 8.

[0036] In this embodiment, the control valves located inside the environmental chamber 3 are all pneumatic valves, and the control valves located outside the environmental chamber 3 are all solenoid valves 10.

[0037] In addition, the host computer has built-in testing software, which communicates with the computer control system, sensor system, data acquisition module and electronic control unit (ECU). The communication methods between the host computer and the electronic control unit (ECU) include diagnostic communication and DBC (Database Controller, a database file describing messages and signals in the CAN bus network) communication.

[0038] The working principle of the air suspension ASU durability test bench provided by this utility model is as follows: First, the cooling fan 4 is installed on the second mounting plate 6, the product under test 8 is installed on the test position, and the surface-mount temperature sensor is attached to the product under test 8. Then, the durability test is performed on the product under test 8. During the test, the temperature of the product under test 8 is monitored in real time by the surface-mount temperature sensor, and the monitored temperature information is transmitted to the host computer. The host computer controls the cooling fan 4 to run according to the received temperature information to force the product under test 8 to cool down.

[0039] Based on the above description in this specification, those skilled in the art will also understand that the following terms used, such as "upper," "lower," "front," "rear," "left," "right," "width," "horizontal," "top," "bottom," "inner," and "outer," are terms indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings of this specification. They are only for the purpose of facilitating the explanation of the present invention and simplifying the description, and do not explicitly or implicitly suggest that the device or element involved must have the specific orientation, or be constructed and operated in a specific orientation. Therefore, the above-mentioned orientation or positional relationship terms should not be understood or interpreted as limitations on the present invention.

[0040] In addition, in the description of this specification, "multiple" means at least two, such as two, three or more, etc., unless otherwise expressly and specifically defined.

Claims

1. A durability testing bench for air suspension ASU, comprising an electrical cabinet and an environmental chamber, characterized in that, It also includes heat dissipation equipment, temperature sensors, a host computer, and a test air path; the environmental chamber has multiple test positions for installing the product under test, and each test position is equipped with heat dissipation equipment and a temperature sensor. The temperature sensor is used to fix on the product under test to obtain the temperature information of the product under test; the heat dissipation equipment and the temperature sensor are connected to the host computer; the product under test is connected to the factory air source through the test air path.

2. The durability testing bench for air suspension ASU according to claim 1, characterized in that, A mounting bracket is provided above the test position, and the heat dissipation device is fixedly mounted on the mounting bracket.

3. The durability testing bench for air suspension ASU according to claim 2, characterized in that, The mounting bracket includes a first mounting plate and a second mounting plate. One end of the first mounting plate is connected to the body of the environmental chamber, and the top end of the second mounting plate is connected to the first mounting plate. The heat dissipation device is mounted on the second mounting plate.

4. The durability testing bench for air suspension ASU according to claim 3, characterized in that, The second mounting plate is connected to one end of the first mounting plate that is away from the body of the environmental chamber or to the side of the first mounting plate.

5. The air suspension ASU durability testing bench according to any one of claims 1 to 4, characterized in that, The heat dissipation device is a cooling fan.

6. The air suspension ASU durability testing bench according to any one of claims 1 to 4, characterized in that, The temperature sensor is a surface-mount temperature sensor.

7. The air suspension ASU durability testing bench according to any one of claims 1 to 4, characterized in that, The test gas path includes a gas storage tank. One end of the gas storage tank is connected to the gas outlet of the product under test installed in the environmental chamber, and the other end is connected to the factory gas source. The gas storage tank is also connected to a pressure sensor, a control valve, and a safety valve. The gas outlet of the product under test is also equipped with a control valve.

8. The durability testing bench for air suspension ASU according to claim 7, characterized in that, All control valves located inside the environmental chamber are pneumatic valves.

9. The durability testing bench for air suspension ASU according to claim 7, characterized in that, All control valves located outside the environmental chamber are solenoid valves.

10. The durability testing bench for air suspension ASU according to claim 7, characterized in that, The test gas path is a parallel gas path, which includes a first branch gas path and a second branch gas path. The first branch gas path has two gas storage tanks connected in series, and the second branch gas path has one gas storage tank. Each gas storage tank is connected to a pressure sensor, a control valve, and a safety valve.

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