HIL test bench of automobile brake product

Abstract

The utility model relates to the technical field of test benches, and discloses an HIL test bench of an automobile brake product, which comprises an execution mechanism execution unit, a real object hydraulic load unit, a sensor signal feedback unit and an HIL bench. According to the HIL test bench of the automobile brake product, the execution mechanism execution unit, the physical hydraulic load unit, the sensor signal feedback unit and the HIL bench are arranged, equipment needing to be tested can be flexibly switched through simple operation under the condition that a test environment is built, two brake systems are integrated on one set of HIL test equipment, and the test efficiency is improved. According to the HIL hardware platform, more board card resources on the HIL hardware platform can be shared, the use efficiency of the HIL hardware platform is effectively improved, the application range is wider, and the HIL hardware platform is suitable for more use conditions.

Description

Technical Field

[0001] The utility model relates to the technical field of test benches, in particular to a HIL test bench for automobile brake products. Background Art

[0002] Brake-by-wire systems can be divided into electro-hydraulic brake (EHB) and electro-mechanical brake (EMB). EHB is based on the traditional hydraulic brake system, replaces some mechanical components with electronic devices, uses brake fluid as a power transmission medium, and has a hydraulic backup brake system. It is the current mainstream technical solution.

[0003] According to the level of integration, EHB can be divided into: Two-box: Ebooster (electronic brake booster) plus ESC (electronic stability control system) two devices work together to brake to achieve various braking functions. The push rod of Ebooster (electronic brake booster) is responsible for connecting the pedal, detecting the depth of the driver's pedal depression, and building pressure for braking. ESC (electronic stability control system) is responsible for distributing the hydraulic pressure built up by Ebooster to each wheel side to achieve braking functions such as ABS (anti-lock braking system).

[0004] One-box: intelligent integrated braking system, which can be understood as integrating the functions of Ebooster and ESC to realize various braking functions independently. It has the ability to connect to the brake pedal, detect the depth of the driver's pedal depression, assist in building up braking pressure, and distribute pressure to each wheel according to its own hydraulic valve to realize various braking functions.

[0005] Hardware-in-the-Loop (HIL) is a development and testing technology for complex device controllers. Through HIL testing, the physical part of a machine or system is replaced by a simulator and is widely used in the development of automotive controllers. In the development of ECU (Electronic Control Unit), the system software and mechanical hardware structure are usually designed in parallel. Testing can only be carried out after integration. The test form is single and cannot adapt to a variety of test situations. Utility Model Content

[0006] In view of the deficiencies of the prior art, the utility model provides a HIL test bench for automobile brake products, which solves the problems mentioned in the above background.

[0007] The utility model provides the following technical solutions: a HIL test bench for automobile brake products, comprising: an actuator execution unit, a physical hydraulic load unit, a sensor signal feedback unit and a HIL bench;

[0008] The actuator execution unit comprises an actuator stand, on which an electric push rod for pushing the brake push rod and a brake pedal mounting portion are respectively arranged, and the brake pedal mounting portion is located on one side of the electric push rod;

[0009] The physical hydraulic load unit includes a hydraulic load bench, on which two sets of four-wheel brake calipers and two sets of EPB brake calipers for the actual vehicle brake disc are arranged, and the hydraulic load bench is connected to the actuator bench through a hydraulic pipeline;

[0010] The sensor signal feedback unit includes a hydraulic pressure sensor for detecting wheel side pressure, a clamping force sensor for measuring the clamping force of the EPB brake caliper, and a thrust force sensor for measuring the thrust size of the brake push rod feedback. The hydraulic pressure sensor and the clamping force sensor are both arranged on the hydraulic load bench, and the thrust force sensor is arranged on the actuator bench.

[0011] Preferably, each set of the four-wheel brake calipers includes two front wheel brake calipers and two rear wheel brake calipers.

[0012] Preferably, a sensor harness is connected between the hydraulic load bench and the actuator bench, an electric push rod harness, a OneBox harness and a TwoBox harness are respectively connected between the actuator bench and the HIL bench, and an ESC harness is connected between the hydraulic load bench and the actuator bench, and between the actuator bench and the HIL bench.

[0013] Preferably, a wiring harness terminal block is provided on the side of the platform, and the electric push rod wiring harness, OneBox wiring harness, TwoBox wiring harness and ESC wiring harness are all connected to the wiring harness terminal block.

[0014] Preferably, a fixing plate is provided on the actuator stand.

[0015] Compared with the prior art, the utility model has the following beneficial effects:

[0016] The HIL test bench for automotive brake products, by setting up actuator units, physical hydraulic load units, sensor signal feedback units and HIL benches, can build a test environment and flexibly switch the equipment to be tested through simple operations. In addition, the two brake systems are integrated on a set of HIL test equipment, which can share more board resources on the HIL hardware platform, effectively improving the utilization efficiency of the HIL hardware platform, and expanding the application range and being suitable for more usage scenarios. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of the utility model;

[0018] Figure 2 This is a schematic diagram of the structure of the actual hydraulic load unit of the utility model;

[0019] Figure 3 This is a schematic diagram of the structure of the execution unit of the execution mechanism of the utility model;

[0020] Figure 4 This is a schematic diagram of the fixed plate structure of the utility model.

[0021] In the figure: 1. Actuator stand; 101. Electric push rod; 102. Brake pedal mounting part; 2. Hydraulic load stand; 201. Brake caliper; 202. EPB brake caliper; 301. Hydraulic pressure sensor; 302. Clamping force sensor; 4. Sensor wiring harness; 5. Electric push rod wiring harness; 6. OneBox wiring harness; 7. TwoBox wiring harness; 8. ESC wiring harness; 9. Wiring harness terminal block; 10. Hydraulic pipeline; 11. Fixing plate; 12. Brake disc; 13. HIL stand. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] See also Figure 1-4 , HIL test bench for automotive brake products, including: actuator execution unit, physical hydraulic load unit, sensor signal feedback unit and HIL bench 13;

[0024] The actuator execution unit comprises an actuator stand 1, on which an electric push rod 101 for pushing a brake push rod and a brake pedal mounting portion 102 are respectively arranged, and the brake pedal mounting portion 102 is located on one side of the electric push rod 101;

[0025] The physical hydraulic load unit includes a hydraulic load bench 2, on which two sets of four-wheel brake calipers 201 and two sets of EPB brake calipers 202 for the actual vehicle brake disc 12 are arranged, and the hydraulic load bench 2 is connected to the actuator bench 1 through a hydraulic pipeline 10;

[0026] The sensor signal feedback unit includes a hydraulic pressure sensor 301 for detecting wheel side pressure, a clamping force sensor 302 for measuring the clamping force of the EPB brake caliper 202, and a thrust force sensor for measuring the thrust size of the brake push rod feedback. The hydraulic pressure sensor 301 and the clamping force sensor 302 are both arranged on the hydraulic load bench 2, and the thrust force sensor is arranged on the actuator bench 1.

[0027] Each set of four-wheel brake calipers 201 includes two front wheel brake calipers and two rear wheel brake calipers.

[0028] Among them, a sensor harness 4 is connected between the hydraulic load bench 2 and the actuator bench 1, an electric push rod harness 5, a OneBox harness 6 and a TwoBox harness 7 are respectively connected between the actuator bench 1 and the HIL bench 13, and an ESC harness 8 is connected between the hydraulic load bench 2 and the actuator bench 1, and between the actuator bench 1 and the HIL bench 13.

[0029] Among them, a wiring harness terminal block 9 is set on the side of the stand, and the electric push rod wiring harness 5, OneBox wiring harness 6, TwoBox wiring harness 7 and ESC wiring harness 8 are all connected to the wiring harness terminal block 9.

[0030] Among them, a fixing plate 11 is arranged on the actuator stand 1.

[0031] In the early stage of setting up the test environment, the wiring harnesses of One-box and Two-box, such as power supply lines, CAN (Controller Area Network is a serial communication protocol bus for real-time applications, used for communication between various components in the car), wheel speed sensor signal lines, sensor power supply lines, sensor signal lines and other resources of the same type can all share the board resources on the HIL hardware platform. After the test environment is set up, switching the device to be tested only requires switching the software engineering on the computer host.

[0032] The computer host computer outputs the brake request signal, and the electric push rod 101 executes to push the brake push rod. The output brake request signal acts on the hydraulic load bench 2 through the brake product brake pressure. The vehicle power model collects the signal on the hydraulic load bench 2 and feeds back the simulated real vehicle data to the brake product, and the stroke control is closed.

[0033] When Two-box is performing HIL testing, you only need to activate the electric cylinder driver on one side and power on the Two-box device. The board resources of the HIL hardware platform can be used by selecting and configuring the hardware channel connected to the Two-box through the host computer; when One-box is performing HIL testing, you only need to activate the electric cylinder driver on the right and power on the One-box device. The board resources of the HIL hardware platform can be used by selecting and configuring the hardware channel connected to the One-box through the host computer.

[0034] The fixing plate 11 of Ebooster (electronic brake booster) and One-box is installed at the same time, which can be compatible with the installation hole distance of 60mm*80mm or the installation hole distance of 72mm*72mm. The ebooster part in One-box and Two-box can be connected to the electric push rod 101 on the test bench, and the braking operation is controlled by the upper computer software. This method is suitable for realizing test scenarios such as automated testing, and can accurately collect the push rod stroke, push rod force signal, car model deceleration, etc., which is convenient for analyzing the pedal feel, driver's braking feeling, pedal force and vehicle deceleration relationship and other data.

[0035] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A HIL test bench for automotive brake products, characterized in that: include: Actuator execution unit, physical hydraulic load unit, sensor signal feedback unit and HIL bench (13); The actuator execution unit comprises an actuator stand (1), on which an electric push rod (101) for pushing a brake push rod and a brake pedal mounting portion (102) are respectively arranged, and the brake pedal mounting portion (102) is located on one side of the electric push rod (101); The real hydraulic load unit comprises a hydraulic load bench (2), on which two sets of four-wheel brake calipers (201) for real vehicle brake discs (12) and two sets of EPB brake calipers (202) are arranged, and the hydraulic load bench (2) is connected to the actuator bench (1) via a hydraulic pipeline (10); The sensor signal feedback unit comprises a hydraulic pressure sensor (301) for detecting wheel side pressure, a clamping force sensor (302) for measuring the clamping force of an EPB brake caliper (202), and a thrust force sensor for measuring the thrust size of brake push rod feedback, wherein the hydraulic pressure sensor (301) and the clamping force sensor (302) are both arranged on a hydraulic load bench (2), and the thrust force sensor is arranged on an actuator bench (1).

2. The HIL test bench for automotive brake products according to claim 1, characterized in that: Each set of the four-wheel brake calipers (201) comprises two front wheel brake calipers and two rear wheel brake calipers.

3. The HIL test bench for automotive brake products according to claim 1, characterized in that: A sensor harness (4) is connected between the hydraulic load bench (2) and the actuator bench (1); an electric push rod harness (5), a OneBox harness (6) and a TwoBox harness (7) are respectively connected between the actuator bench (1) and the HIL bench (13); and an ESC harness (8) is connected between the hydraulic load bench (2) and the actuator bench (1), and between the actuator bench (1) and the HIL bench (13).

4. The HIL test bench for automotive brake products according to claim 3, characterized in that: A wiring harness terminal block (9) is provided on the side of the platform, and the electric push rod wiring harness (5), the OneBox wiring harness (6), the TwoBox wiring harness (7) and the ESC wiring harness (8) are all connected to the wiring harness terminal block (9).

5. The HIL test bench for automotive brake products according to claim 1, characterized in that: A fixing plate (11) is arranged on the actuator stand (1).

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