A test bench for testing the feel of a wired power steering system.

Abstract

This utility model relates to a test bench for testing the foot feel of a power steering system, belonging to the field of automotive braking technology. The seat, product mounting plate, multi-way four-way valve block, and load fixture are sequentially fixedly connected to the test bench, with the actual vehicle caliper load mounted on the load fixture. The advantages are its novel structure, employing the entire vehicle seat assembly and the entire vehicle brake caliper load, including the brake pedal, thus making the testing process closer to the test data of the entire vehicle; it can simulate the pedal test during vehicle assembly, is easy to move, and can be moved to the working environment of different test scenarios, such as for noise testing and analysis. It also satisfies the data acquisition of various braking signals from the entire vehicle, more closely resembling the actual vehicle condition, facilitating operation, and enabling foot feel analysis based on different driving habits, thereby optimizing product design.

Description

Technical Field

[0001] This utility model belongs to the field of automotive braking technology, specifically relating to a test bench that satisfies the foot feel test of a power steering system. Background Technology

[0002] With the rapid development of the automotive industry, traditional mechanical brake booster products and drive-by-wire booster products are at a critical stage of transformation. Various new drive-by-wire booster products are emerging and being updated. While completed prototypes can be tested on performance testing benches to obtain various performance pressure curves, they cannot test the actual pedal feel or the pressure build-up under full vehicle caliper load. This is a key indicator for the transformation of drive-by-wire products from traditional mechanical products. Before assembling drive-by-wire products into a vehicle, repeated pedal feel tests are necessary, which can simultaneously test the pressure build-up. To reduce the workload of disassembling and assembling boosters in the vehicle and to facilitate the debugging and testing of various drive-by-wire software functions, a pedal test bench suitable for load testing of drive-by-wire booster products is designed. Summary of the Invention

[0003] This invention provides a test bench that satisfies the foot feel test of a wire-controlled booster, thereby solving the current problem that the foot feel of a wire-controlled booster cannot be tested.

[0004] The technical solution adopted by this utility model includes a test bench, a seat, a product mounting plate, a multi-way four-way valve block, a load fixture, and a vehicle actual caliper load. The seat, product mounting plate, multi-way four-way valve block, and load fixture are sequentially fixedly connected to the test bench, and the vehicle actual caliper load is respectively mounted on the load fixture.

[0005] The test bench includes a frame, a table panel, and self-locking wheels, wherein the table panel is fixedly connected to the frame, and self-locking wheels are installed at the four corners of the bottom of the frame.

[0006] The seat is a complete vehicle seat assembly.

[0007] The product mounting plate includes a vertical plate and reinforcing ribs, wherein the reinforcing ribs are fixedly connected to both sides of the vertical plate, and the two are fixedly connected together to the top of the test bench via the bottom.

[0008] One side of the product mounting plate is used to install the brake pedal, and the other side is used to install the drive-by-wire booster.

[0009] The multi-way four-way valve block includes a four-way valve block and a bracket, wherein four four-way valve blocks are installed inside the bracket.

[0010] The four-way valve block is connected to the oil outlet pipe of the drive-by-wire booster, the oil inlet pipe of the caliper load, the bleed screw, and the pressure sensor, respectively.

[0011] The load fixture is installed on a 60° inclined plane to accommodate the actual caliper load of the vehicle.

[0012] Two of the caliper loads in the actual caliper load of the vehicle are conventional caliper brakes, and the other two are EPB caliper brakes with electronic parking brake, used to completely simulate the caliper braking mode of the four wheels of the vehicle.

[0013] The advantages of this utility model are its novel structure, employing a complete vehicle seat assembly and a complete vehicle brake caliper load, including the brake pedal. This makes the testing process closer to the test data of a complete vehicle. It can simulate the pedal test during vehicle assembly, and the load uses the actual caliper load of the complete vehicle, which is closer to the test data of the complete vehicle, facilitating the test analysis of drive-by-wire products driven by human drivers. A four-way valve block is used to connect each pipeline and collect pressure data for each pipeline, which is convenient for operation and avoids the workload of disassembling and assembling the entire vehicle. The caliper load installation angle is closer to the installation angle of the caliper on the complete vehicle, which is convenient for exhaust preparation work in the early stage of the test. The whole unit is easy to move and can be moved to the working environment of different test scenarios, such as conducting noise test analysis. At the same time, it meets the data collection of various braking signals of the complete vehicle, which is closer to the actual vehicle situation, easy to operate, and also realizes the foot feel analysis of different driving habits, thereby optimizing the product design. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of this utility model and these drawings without creative effort. Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 A schematic diagram of the structure of the test bench of this utility model; Figure 3 This utility model presents a structural schematic diagram of a multi-way four-way valve block. Detailed Implementation

[0015] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0016] like Figure 1As shown, the test bench includes a test stand 1, a seat 2, a product mounting plate 3, a multi-way four-way valve block 4, a load fixture 5, and a vehicle actual caliper load 6. The seat 2, product mounting plate 3, multi-way four-way valve block 4, and load fixture 5 are sequentially fixedly connected to the top of the test bench 1, and the vehicle actual caliper load 6 is respectively mounted on the load fixture 5.

[0017] like Figure 2 As shown, the test bench 1 includes a frame 101, a table panel 102, and self-locking wheels 103, wherein the table panel 102 is fixedly connected to the frame 101, and self-locking wheels 103 are respectively installed at the four corners of the bottom of the frame 101.

[0018] The seat 2 is a vehicle seat assembly, with the same adjustment method as the whole vehicle. It can slide back and forth and the seat back angle can be adjusted.

[0019] The product mounting plate 3 includes a vertical plate 301 and a reinforcing rib 302, wherein the reinforcing rib 302 is fixedly connected to both sides of the vertical plate 301, and the two are fixedly connected to the table panel 102 of the test bench 1 through the bottom.

[0020] One side of the product mounting plate 3 is used to install the brake pedal 7, and the other side is used to install the drive-by-wire booster 8.

[0021] like Figure 3 As shown, the multi-way four-way valve block 4 includes a four-way valve block 401 and a bracket 402, wherein four four-way valve blocks 401 are installed inside the bracket 402.

[0022] The four-way valve block 401 is connected to the oil outlet pipeline of the drive-by-wire booster, the oil inlet pipeline of the caliper load, the bleed screw and the pressure sensor, respectively, which solves the needs of pipeline venting and pipeline hydraulic pressure collection.

[0023] The load fixture 5 is mounted on a 60° inclined plane to accommodate the actual caliper load 6 of the vehicle. The purpose is to ensure that during the exhaust preparation process before the test, all air bubbles in the insert cavity are tilted to the high side, so that the gas can be fully expelled during the exhaust process.

[0024] Two of the caliper loads in the actual caliper load 6 of the vehicle are conventional caliper brakes, and the other two are EPB caliper brakes with electronic parking brake, used to completely simulate the caliper braking mode of the four wheels of the vehicle.

[0025] Working principle (1) Fix the power steering product and pedal assembly to the product mounting plate, adjust the seat position according to driving habits, and make sure the tester's pedal angle is consistent with the driving habits of the whole vehicle; (2) Connect the oil outlet pipe of the power steering product to the four-way valve block in sequence, and connect the hydraulic sensor for pressure acquisition of each brake line to the four-way valve block. Taking one of the four-way valves as an example, connect the bleed screw to the upper port of the four-way valve, connect the hydraulic sensor to the lower port, connect the product oil outlet pipe to the rear port, and connect the caliper load oil pipe to the front port to complete the connection of a total of four hydraulic lines. (3) Connect the control module and acquisition module wiring harness of the power steering product, connect the wiring harness of each hydraulic sensor, and there are four caliper loads in total. Two of the caliper loads are conventional caliper brakes, and the other two are EPB caliper brakes with electronic parking brake, which completely simulate the caliper braking mode of the four wheels of the vehicle. Therefore, it is also necessary to connect the wiring harness of the two EPB caliper brakes and connect the signals of each wiring harness to the control computer. (4) Perform oil filling and venting. There are two venting methods. The first method is vacuum venting. Vacuum is drawn from the product's oil filling port. After the entire system pipeline is completely vacuumed, switch the pipeline to add brake fluid from the main oil port under pressure to complete the venting of the entire system. The second method is to perform conventional venting. Add brake fluid to the oil filling port and repeatedly press the pedal to build up pressure in the pipeline and load. First, vent from the caliper bleed screw. After there are no air bubbles, vent from the four-way valve block bleed screw. This completes the caliper load venting and pipeline venting. The pressure buildup is observed by collecting data through the computer to see if the pedal stroke and pressure buildup requirements are met. (5) Conduct pedal tests. Plot the pressure build-up curve in the computer for each pedaling process to determine whether it meets the design requirements. The pressure build-up feel of the product can also be judged by the pedaling feel to determine whether it meets the normal driving habits.

[0026] To analyze the braking noise of the product, this test bench should be placed in an anechoic chamber, and the pedal test should be performed as described above. The noise acquisition system will collect the entire braking process of the pedal test and perform noise data processing and analysis.

[0027] By conducting pedal tests with different people, we can better simulate the braking feel of different driving habits. We can also analyze product design issues based on different driving feel, thereby making design improvements, optimizing product design, and enhancing product performance in many aspects.

[0028] The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the scope of protection of the present invention is not limited to the specific details in the above embodiments. Within the scope of the technical concept of the present invention, any equivalent substitutions or modifications made by those skilled in the art based on the technical solution and the inventive concept of the present invention within the scope of the technical concept disclosed in the present invention shall all fall within the scope of protection of the present invention.

[0029] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable way without contradiction. In order to avoid unnecessary repetition, this utility model will not describe the various possible combinations separately.

Claims

1. A test bench for testing the feel of a drive-by-wire power steering system, characterized in that... The system includes a test bench, a seat, a product mounting plate, a multi-way four-way valve block, a load fixture, and the actual vehicle caliper load. The seat, product mounting plate, multi-way four-way valve block, and load fixture are sequentially and fixedly connected to the test bench, while the actual vehicle caliper load is mounted on the load fixture.

2. A test bench for testing the feel of a wire-controlled power steering system according to claim 1, characterized in that... The test bench includes a frame, a table panel, and self-locking wheels, wherein the table panel is fixedly connected to the frame, and self-locking wheels are installed at the four corners of the bottom of the frame.

3. A test bench for testing the foot feel of a wire-controlled power steering system according to claim 1, characterized in that... The seat described is a complete vehicle seat assembly.

4. A test bench for testing the feel of a wire-controlled power steering system according to claim 1, characterized in that... The product mounting plate includes a vertical plate and reinforcing ribs, wherein the reinforcing ribs are fixedly connected to both sides of the vertical plate, and the two are fixedly connected to the top of the test bench table via the bottom.

5. A test bench for testing the foot feel of a wire-controlled power steering system according to claim 4, characterized in that... One side of the product mounting plate is used to install the brake pedal, and the other side is used to install the drive-by-wire booster.

6. A test bench for testing the feel of a wire-controlled power steering system according to claim 1, characterized in that... The multi-way four-way valve block includes a four-way valve block and a bracket, wherein four four-way valve blocks are installed inside the bracket.

7. A test bench for testing the foot feel of a wire-controlled power steering system according to claim 6, characterized in that... The four-way valve block is connected to the oil outlet pipe of the drive-by-wire booster, the oil inlet pipe of the caliper load, the bleed screw, and the pressure sensor, respectively.

8. A test bench for testing the foot feel of a wire-controlled power steering system according to claim 1, characterized in that... The load fixture is installed on a 60° inclined plane to accommodate the actual caliper load of the vehicle.

9. A test bench for testing the foot feel of a wire-controlled power steering system according to claim 1, characterized in that... Two of the caliper loads in the actual caliper load of the vehicle are conventional caliper brakes, and the other two are EPB caliper brakes with electronic parking brake, used to completely simulate the caliper braking mode of the four wheels of the vehicle.

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