A detection platform for a control and stabilization unit of an automotive hydraulic system

Abstract

This invention discloses a testing platform for the control and stability unit of an automotive hydraulic system, comprising a fixed frame. The upper end of the fixed frame is equipped with a pressure-building mechanism that provides hydraulic power to the test vehicle's hydraulic system. The middle of the fixed frame surface is equipped with a flow-diversion control mechanism that controls hydraulic flow. The lower end of the fixed frame is equipped with a brake testing mechanism for detecting brake performance. This invention offers good performance, enabling multiple tests on various components in the vehicle's hydraulic circuit. Furthermore, the testing operation is simple, thus significantly improving the testing range and effectiveness of the device.

Description

Technical Field

[0001] This invention relates to the field of automotive testing bench technology, specifically to a testing bench for automotive hydraulic system control and stability units. Background Technology

[0002] With the improvement and popularization of active safety performance in automobile driving, the factory performance testing of the power control and hydraulic system control and stability units of automobiles has become particularly important, making the integration and construction of the test bench extremely critical.

[0003] This invention belongs to the field of automotive manufacturing technology and relates to a performance test bench for hydraulic control units of automotive dynamic stability control systems. The mechanical connection system disclosed in Tsinghua University's application (CN200910081347) is representative; it analyzes and processes data fed back from pressure sensors to determine whether the HCU product meets factory standards. However, this application is complex and relatively expensive, and has limited test items. Therefore, there is currently a lack of a simple, accurate, and low-cost automotive hydraulic system control and stability unit test bench that can add new test items based on the one disclosed in Tsinghua University's application (CN200910081347). Summary of the Invention

[0004] The purpose of this invention is to provide a test bench for the control and stability unit of an automotive hydraulic system to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a test bench for automotive hydraulic system control and stability unit, comprising a fixed frame, wherein a pressure-building mechanism for providing hydraulic power to the test vehicle hydraulic system is provided at the upper end of the fixed frame, a flow-diversion control mechanism for controlling hydraulic flow is provided at the middle of the surface of the fixed frame, and a brake testing mechanism for detecting brake performance is provided at the lower end of the fixed frame.

[0006] Preferably, the pressure-building mechanism includes a pneumatic push rod, a brake pressure-building master cylinder, and a main connecting pipe. The upper end of the fixed frame is fixedly provided with a pneumatic push rod for pushing the brake pressure-building master cylinder to generate pressure. The upper side of the fixed frame is fixedly provided with a brake pressure-building master cylinder that provides brake hydraulic power to the entire system. The movable end of the pneumatic push rod is connected to the brake pressure-building master cylinder through a transmission connection. The upper end of the brake pressure-building master cylinder is fixedly provided with a main connecting pipe for transmitting brake hydraulic oil.

[0007] Preferably, the flow control mechanism includes a distributor, an electromagnetic control valve, and a pneumatic ball valve. A distributor for distributing hydraulic oil flow is fixedly installed on the surface of the fixed frame on one side of the brake pressure-building master cylinder. The main connecting pipe is interconnected with the distributor. An electromagnetic control valve is fixedly installed in the middle of the fixed frame surface. The distributor and the electromagnetic control valve are interconnected. A pneumatic ball valve for controlling the opening and closing ratio of the brake hydraulic lines is fixedly installed on the surface of the fixed frame below the electromagnetic control valve. The electromagnetic control valve and the pneumatic ball valve are interconnected through a pipe. The flow control mechanism can control the flow of brake oil lines. Since a typical passenger car has four brakes, the electromagnetic control valve can control the operation of all four brakes. Hydraulic testing of one brake position or multiple brakes can be performed as needed.

[0008] Preferably, the brake detection mechanism includes a brake disc, a brake pressure cylinder, a clamping frame, and brake pads. The lower center of the fixed frame houses the axially rotatable brake disc. Brake pressure cylinders are fixedly mounted on both sides of the brake disc on the surface of the fixed frame. A clamping frame for fixing the brake pads is mounted on the movable end of each brake pressure cylinder. The clamping frame is sleeved on the outer surface of the brake disc, and a brake pad is fixedly mounted on the side of the clamping frame closest to the brake disc. The brake detection mechanism can clamp the brake disc to simulate the braking conditions of a vehicle.

[0009] Preferably, a first pressure detection device is provided at the lower end of the brake pressure building master cylinder, which can detect the pressure inside the brake pressure building master cylinder in real time.

[0010] Preferably, a second pressure detection device is provided between the pneumatic ball valve and the brake pressure-building cylinder. The second pressure detection device can detect the pressure in the pipeline after the pneumatic ball valve is opened and distributed proportionally.

[0011] Preferably, a third pressure detection device is fixedly provided on the surface of the clamping frame on one side of the brake pad, and the brake pressure finally transmitted to the brake pad can be detected by the third pressure detection device.

[0012] Compared with the prior art, the beneficial effects of the present invention are:

[0013] 1. This invention uses a third pressure detection device to detect the brake pressure ultimately transmitted to the brake pads. When the third pressure detection device malfunctions, the damaged location can be quickly identified. For example, if the actual brake pressure detected by the third pressure detection device does not correspond to the pressure value provided by the second pressure detection device, it indicates a problem with the brake pressure build-up cylinder and the brake pad position. This allows for rapid identification of the abnormality. Furthermore, under the action of the three pressure detection devices, the device can perform a series of performance testing operations on the automotive hydraulic system, such as pressure boosting and sealing tests, depressurization and boosting speed tests, etc.

[0014] 2. This invention can control the flow of the pipeline through an electromagnetic control valve, thereby controlling whether the four brakes are working. It can perform hydraulic testing of one brake position as needed, or perform hydraulic testing of multiple brakes as needed.

[0015] 3. In this invention, the brake hydraulic oil is supplied through a pneumatic ball valve. By controlling the oil supply in different oil circuits through different opening ratios of the pneumatic ball valve, different braking pressures are generated in the four brake discs, thereby simulating the braking situation of each wheel individually controlled by the vehicle ECU. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of a test bench for the control and stability unit of an automotive hydraulic system according to the present invention;

[0017] Figure 2 This is a side view of a test bench for the control and stability unit of an automotive hydraulic system according to the present invention;

[0018] Figure 3 This is a pipeline connection diagram of the components of a test bench for the control and stability unit of an automotive hydraulic system according to the present invention.

[0019] In the diagram: 1. Fixed frame; 2. Pneumatic push rod; 3. Brake pressure build-up master cylinder; 4. Main connecting pipe; 5. Distributor; 6. Solenoid control valve; 7. Pneumatic ball valve; 8. Brake disc; 9. Brake pressure build-up wheel cylinder; 10. Clamping frame; 11. Brake pad; 12. First pressure detection device; 13. Second pressure detection device; 14. Third pressure detection device. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] Please see Figure 1-3 The present invention provides a technical solution: a test bench for automotive hydraulic system control and stability unit, including a fixed frame 1, a pressure building mechanism for providing hydraulic power to the test vehicle hydraulic system is provided at the upper end of the fixed frame 1, a flow control mechanism for controlling hydraulic flow is provided at the middle of the surface of the fixed frame 1, and a brake testing mechanism for testing brake performance is provided at the lower end of the fixed frame 1.

[0022] The pressure-building mechanism includes a pneumatic push rod 2, a brake pressure-building master cylinder 3, and a main connecting pipe 4. The upper end of the fixed frame 1 is fixedly provided with a pneumatic push rod 2 for pushing the brake pressure-building master cylinder 3 to generate pressure. The upper side of the fixed frame 1 is fixedly provided with a brake pressure-building master cylinder 3 that provides brake hydraulic power to the entire system. The movable end of the pneumatic push rod 2 is connected to the brake pressure-building master cylinder 3 through a transmission. The upper end of the brake pressure-building master cylinder 3 is fixedly provided with a main connecting pipe 4 for transmitting brake hydraulic oil.

[0023] The flow control mechanism includes a distributor 5, an electromagnetic control valve 6, and a pneumatic ball valve 7. A distributor 5 for distributing hydraulic oil flow is fixedly installed on the surface of the fixed frame 1 on one side of the brake pressure-building master cylinder 3. The main connecting pipe 4 is interconnected with the distributor 5. An electromagnetic control valve 6 is fixedly installed in the middle of the surface of the fixed frame 1. The distributor 5 and the electromagnetic control valve 6 are interconnected. A pneumatic ball valve 7 for controlling the opening and closing ratio of the brake hydraulic lines is fixedly installed on the surface of the fixed frame 1 at the lower end of the electromagnetic control valve 6. The electromagnetic control valve 6 and the pneumatic ball valve 7 are interconnected through a pipe. The flow control mechanism can control the flow of brake oil lines. Since a typical passenger car has four brakes, the electromagnetic control valve 6 can control the operation of all four brakes. Hydraulic testing of one brake position or multiple brakes can be performed as needed.

[0024] The brake testing mechanism includes a brake disc 8, a brake pressure cylinder 9, a clamping frame 10, and brake pads 11. The brake disc 8, capable of axial rotation, is located at the lower center of the fixed frame 1. Brake pressure cylinders 9 are fixedly mounted on both sides of the brake disc 8 on the surface of the fixed frame 1. The movable end of each brake pressure cylinder 9 is equipped with a clamping frame 10 for fixing the brake pads 11. The clamping frame 10 is sleeved on the outer surface of the brake disc 8, and the brake pads 11 are fixedly mounted on the side of the clamping frame 10 closest to the brake disc 8. The brake testing mechanism can clamp the brake disc 8 to simulate the braking conditions of a car.

[0025] The lower end of the brake pressure building master cylinder 3 is provided with a first pressure detection device 12, which can detect the pressure inside the brake pressure building master cylinder 3 in real time.

[0026] A second pressure detection device 13 is provided between the pneumatic ball valve 7 and the brake pressure building cylinder 9. The pressure in the pipeline after the pneumatic ball valve 7 is opened and distributed proportionally can be detected by the second pressure detection device 13.

[0027] A third pressure detection device 14 is fixedly installed on one side of the brake pad 11 on the surface of the clamping frame. The third pressure detection device 14 can detect the brake pressure that is finally transmitted to the brake pad 11.

[0028] Working Principle: The device connects the brake pressure master cylinder 3, multiple pressure sensors, brake pressure wheel cylinder 9, solenoid control valve 6, and pneumatic ball valve 7 through pipelines to build a simulated test environment for an automotive hydraulic system. The HCU is connected to the test bench. By establishing different pressures and opening the pneumatic ball valve 7 at different positions, and controlling the valve body with different duty cycles, the device tests the sealing performance of the hydraulic system and oil circuit, as well as the active pressurization and valve body functions. When using the device, the pneumatic push rod 2 pushes the brake pressure master cylinder 3, thereby squeezing the hydraulic oil inside. The brake hydraulic oil is then divided into four paths by the distributor 5, corresponding to the four brake paths of a traditional vehicle. The solenoid control valve 6 controls the flow of the pipeline, thus controlling the operation of the four brakes. Hydraulic testing of one brake position or multiple brakes can be performed as needed. Subsequently, the brake hydraulic oil passes through the pneumatic ball valve 7, and the different opening ratios of the pneumatic ball valve 7 control the oil flow in different oil circuits. This allows the four brake discs 8 to generate different braking pressures, thus simulating the vehicle ECU's individual control of each wheel's braking. During operation, the device uses a first pressure detection device 12 to monitor the pressure inside the brake master cylinder 3 in real time, a second pressure detection device 13 to monitor the pressure in the pipeline after the pneumatic ball valve 7 proportionally distributes the pressure, and a third pressure detection device 14 to monitor the braking pressure ultimately transmitted to the brake pads 11. If any of these pressure detection devices malfunctions, the faulty location can be quickly pinpointed. For example, if the actual braking pressure detected by the third pressure detection device 14 does not correspond to the pressure value provided by the second pressure detection device 13, it indicates a problem with the brake master cylinder 9 and the brake pads 11. This allows for rapid identification of the fault. Furthermore, under the action of the three pressure detection devices, the device can perform a series of performance tests on the automotive hydraulic system, such as pressure increase and sealing tests, depressurization and pressure increase speed tests, significantly improving the device's effectiveness.

[0029] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0030] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A test bench for automotive hydraulic system control and stability unit, comprising a fixed frame (1), characterized in that: The upper end of the fixed frame (1) is provided with a pressure-building mechanism that provides hydraulic power to the hydraulic system of the test vehicle. The middle part of the surface of the fixed frame (1) is provided with a flow control mechanism that controls the hydraulic flow. The lower end of the fixed frame (1) is provided with a brake testing mechanism for detecting brake performance. The pressure-building mechanism includes a pneumatic push rod (2), a brake pressure-building master cylinder (3), and a main connecting pipe (4). The upper end of the fixed frame (1) is fixedly provided with a pneumatic push rod (2) for pushing the brake pressure-building master cylinder (3) to generate pressure. The upper end of the fixed frame (1) is provided with a pneumatic push rod (2) for pushing the brake pressure-building master cylinder (3) to generate pressure. A brake pressure-building master cylinder (3) is fixedly installed on one side to provide brake hydraulic power for the entire system. The movable end of the pneumatic push rod (2) is connected to the brake pressure-building master cylinder (3) through transmission. A main connecting pipe (4) for transmitting brake hydraulic oil is fixedly installed on the upper end of the brake pressure-building master cylinder (3). The flow control mechanism includes a distributor (5), an electromagnetic control valve (6), and a pneumatic ball valve (7). A distributor (5) for distributing the flow of hydraulic oil is fixedly installed on the surface of the fixed frame (1) on one side of the brake pressure-building master cylinder (3). The main connecting pipe (4) is connected to the brake pressure-building master cylinder (3) through transmission. The pipe (4) and the distributor (5) are interconnected. An electromagnetic control valve (6) is fixedly installed in the middle of the surface of the fixed frame (1). The distributor (5) and the electromagnetic control valve (6) are interconnected. A pneumatic ball valve (7) for controlling the opening and closing ratio of the brake hydraulic line is fixedly installed on the surface of the fixed frame (1) at the lower end of the electromagnetic control valve (6). The electromagnetic control valve (6) and the pneumatic ball valve (7) are interconnected through a pipe. The brake detection mechanism includes a brake disc (8), a brake pressure build-up cylinder (9), and a clamping frame. (10) Brake pad (11) A brake disc (8) that can rotate axially is provided at the lower middle part of the fixed frame (1). Brake pressure cylinders (9) are fixedly provided on both sides of the brake disc (8) on the surface of the fixed frame (1). A clamping frame (10) for fixing the brake pad (11) is provided at the movable end of the brake pressure cylinder (9). The clamping frame (10) is sleeved on the outer surface of the brake disc (8). The brake pad (11) is fixedly provided on the side surface of the clamping frame (10) near the brake disc (8).

2. The automotive hydraulic system control and stability unit testing bench according to claim 1, characterized in that: The lower end of the brake pressure building master cylinder (3) is provided with a first pressure detection device (12).

3. The automotive hydraulic system control and stability unit testing bench according to claim 1, characterized in that: A second pressure detection device (13) is provided between the pneumatic ball valve (7) and the brake pressure build-up wheel cylinder (9).

4. The automotive hydraulic system control and stability unit testing bench according to claim 1, characterized in that: A third pressure detection device (14) is fixedly installed on the surface of the clamping frame (10) on one side of the brake pad (11).

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