Vehicle hydraulic braking system testing device

Abstract

The utility model discloses a vehicle hydraulic braking system testing device which comprises a control unit and a hydraulic braking system testing rack which is in communication connection with the control unit. The hydraulic braking system test bench comprises a front cabin and a rear cabin, the front cabin is provided with a hydraulic braking system to be tested, and the hydraulic braking system is in communication connection with the control unit; the rear cabin comprises an automatic testing cabin and a manual testing cabin which are used for providing braking force for the hydraulic braking system, and the automatic testing cabin is provided with an automatic testing power source for driving a brake pedal of the hydraulic braking system. According to the vehicle hydraulic brake system testing device, the testing result is more real and reliable, the testing quality is improved, the testing period is shorter, and the testing stability and repeatability are good.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicle testing, in particular to a vehicle hydraulic brake system testing device. Background Art

[0002] With the development of the automobile industry, various new technologies on automobiles have been rapidly iterated and updated. Among them, the hydraulic brake system is a common automobile brake system. The hydraulic brake system applies wheel brakes to the wheels through hydraulic pressure to slow down or stop the vehicle. It is one of the main forms of modern automobile brake systems. The role of the automobile brake system in automobile safety is becoming more and more important, and relevant regulations have increasingly stringent regulations and testing requirements for the brake system. Therefore, it is necessary to fully test and verify the hydraulic brake system.

[0003] In the current vehicle development process, the hydraulic brake system is loaded onto the actual vehicle before the system function test or other function tests related to the hydraulic brake system are carried out. The hydraulic brake system is loaded onto the actual vehicle for testing and verification, which results in a long test cycle, poor test stability and repeatability, and difficulty in completing test verification under dangerous or extreme conditions. If simulation methods are used for testing and verification, the characteristics of the hydraulic components inside the hydraulic brake system need to be input as modeling data, and most of the characteristics of these components are nonlinear, which will cause the simulation results to be inconsistent with the actual experimental results, and the reliability of the test results is poor. Utility Model Content

[0004] In view of this, the utility model provides a vehicle hydraulic brake system testing device, the test results are more real and reliable, the test quality is improved, the test cycle is shorter, and the test stability and repeatability are good.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A vehicle hydraulic brake system testing device, comprising:

[0007] Control unit;

[0008] A hydraulic brake system test bench, in communication connection with the control unit;

[0009] The hydraulic brake system test bench includes a front cabin and a rear cabin. The front cabin is provided with a hydraulic brake system to be tested, and the hydraulic brake system is communicatively connected with the control unit; the rear cabin includes an automated test cabin and a manual test cabin for providing braking force for the hydraulic brake system, and the automated test cabin is provided with an automatic test power source for driving the brake pedal of the hydraulic brake system.

[0010] Optionally, the front cabin comprises:

[0011] First frame;

[0012] Brake pedal;

[0013] An electro-hydraulic integrated brake control system is mounted on a first base plate on the first frame, and the brake pedal is connected to the electro-hydraulic integrated brake control system;

[0014] A master cylinder, integrated in the electro-hydraulic integrated brake control system;

[0015] a caliper mounted on a caliper bracket on the first frame, the caliper bracket being provided with a clamping force sensor, the caliper being in contact with the clamping force sensor when the caliper is clamped;

[0016] A hydraulic pipeline, connecting the master cylinder and the caliper, wherein a hydraulic sensor is provided on the hydraulic pipeline;

[0017] The hydraulic pressure sensor is communicatively connected to the control unit.

[0018] Optionally, the hydraulic pipeline includes a first hydraulic branch pipe and a second hydraulic branch pipe, one end of the first hydraulic branch pipe is connected to the master cylinder, and the other end is connected to the hydraulic sensor, and one end of the second hydraulic branch pipe is connected to the caliper, and the other end is connected to the hydraulic sensor;

[0019] The first hydraulic branch pipe is provided with a first valve, and the second hydraulic branch pipe is provided with a second valve.

[0020] Optionally, a supporting structure for mounting the hydraulic sensor is provided on the first bottom plate;

[0021] The support structure includes a three-way bracket, a three-way bracket is fixedly connected to the three-way bracket, a first opening of the three-way bracket is connected to the first hydraulic branch pipe, a second opening is connected to the second hydraulic branch pipe, and a third opening is connected to the hydraulic sensor

[0022] The first hydraulic branch pipe includes a first branch pipe and a second branch pipe, the first branch pipe connects the master cylinder with the first valve, and the second branch pipe connects the first valve with the three-way connection;

[0023] The second hydraulic branch pipe includes a third branch pipe and a fourth branch pipe, the third branch pipe connects the tee and the second valve, and the fourth branch pipe connects the second valve and the caliper;

[0024] The first branch pipe and the fourth branch pipe are soft pipes, and the second branch pipe and the third branch pipe are hard pipes.

[0025] Optionally, the caliper bracket is arranged on a caliper bracket mounting plate, and the caliper bracket mounting plate is fixedly connected to the first frame;

[0026] The caliper bracket includes a bracket main board, a caliper support plate and a sensor support plate, the bracket main board is fixedly connected to the caliper bracket mounting plate, the caliper support plate and the sensor support plate are fixedly connected to the bracket main board, and the sensor support plate is installed at the position of the brake pad used in conjunction with the caliper;

[0027] The caliper is connected to the caliper support plate, and the clamping force sensor is connected to the sensor support plate.

[0028] Optionally, an oil collecting tank is provided below the caliper bracket mounting plate, and the oil collecting tank is connected to the first frame;

[0029] The opening height of the oil collecting tank is lower than the height of the first bottom plate;

[0030] Oil absorbing paper is laid on the bottom of the oil collecting tank and the first bottom plate.

[0031] Optionally, the automated test chamber includes:

[0032] A power device is the automatic test power source, and the power output end of the power device moves linearly;

[0033] A push rod, one end of which is connected to the power output end of the power device, and the other end of which is slidably connected to the brake pedal;

[0034] A thrust sensor is arranged at a connection position between the power device and the push rod;

[0035] The thrust sensor is communicatively connected to the control unit.

[0036] Optionally, the automated test cabin further comprises a second frame, a second bottom plate is fixedly connected to the second frame, and the power device is arranged on the second bottom plate;

[0037] The end of the push rod used for connecting with the brake pedal is provided with a spherical structure, and the spherical surface of the spherical structure contacts the pedal arm of the brake pedal;

[0038] Guard plates are arranged on both sides of the spherical structure, and the pedal arm is arranged between the guard plates on both sides;

[0039] The power device is an electric cylinder or a motor;

[0040] A locking and limiting structure is provided on one side of the second frame for connecting with the front cabin.

[0041] Optionally, the artificial test chamber includes:

[0042] A seat, fixedly arranged on a third bottom plate, wherein the third bottom plate is arranged on a third frame;

[0043] A steering wheel test fixture, installed on the third frame;

[0044] A shift handle test fixture, installed on the third base plate;

[0045] an accelerator pedal assembly, mounted on the third base plate;

[0046] The setting positions of the seat, steering wheel test fixture, shift handle test fixture and accelerator pedal assembly are all referenced to the actual vehicle settings.

[0047] Optionally, the steering wheel test tool comprises:

[0048] A fixed connecting rod connected to the third frame;

[0049] A motor bracket connected to the fixed link;

[0050] A motor connected to the motor bracket;

[0051] A steering wheel connected to the power output end of the motor;

[0052] The motor bracket includes a motor support bottom plate, a motor support end plate and an angle adjustment side plate, wherein the motor support end plate is arranged at both ends of the motor support bottom plate, the motor support end plate is arranged corresponding to the end of the motor, the angle adjustment side plate is arranged at both sides of the motor support bottom plate, and the angle adjustment side plate is connected to the fixed connecting rod;

[0053] An arc-shaped connecting groove is provided at a position corresponding to the fixed connecting rod, and the angle-adjusting side plate and the fixed connecting rod are connected via a connecting piece connected in the arc-shaped connecting groove.

[0054] It can be seen from the above technical scheme that the vehicle hydraulic brake system test device provided by the utility model includes an automated test cabin and a manual test cabin. The automated test cabin realizes automatic testing of the hydraulic brake system, and the manual test cabin realizes manual testing of the hydraulic brake system. The vehicle hydraulic brake system test device of the utility model can obtain test results under both manual and automatic test devices. Comparing the test results obtained by the two test devices can effectively avoid errors caused by excessive idealization of model simulation, meet the test personnel's testing, verification and evaluation of the hydraulic brake system, make the test results more real and reliable, and improve the quality of the test. The vehicle hydraulic brake system test device of the utility model realizes the performance test of the hydraulic brake system on the hydraulic brake system test bench. Compared with the actual vehicle test, the test cycle is shorter, the test stability and repeatability are good, and the test verification of dangerous or extreme working conditions can be completed. BRIEF DESCRIPTION OF THE DRAWINGS

[0055] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0056] Figure 1 A schematic diagram of a test system of a vehicle hydraulic brake system test device provided by an embodiment of the utility model;

[0057] Figure 2 A schematic diagram of the structure of a vehicle hydraulic brake system testing device provided by an embodiment of the utility model;

[0058] Figure 3 A schematic diagram of the structure of the front cabin provided by an embodiment of the utility model;

[0059] Figure 4 A partial structural schematic diagram of the front cabin provided by an embodiment of the utility model;

[0060] Figure 5 A structural schematic diagram of a support structure provided by an embodiment of the utility model;

[0061] Figure 6 A schematic diagram of the structure of the connection between the caliper bracket and the caliper provided in an embodiment of the utility model;

[0062] Figure 7 for Figure 6 A schematic cross-sectional structure diagram of the AA position;

[0063] Figure 8A schematic diagram of the structure of an automated test chamber provided by an embodiment of the utility model;

[0064] Fig. 9 A schematic diagram of the structure of the connection between the power device and the brake pedal provided in an embodiment of the utility model;

[0065] Fig.10 A schematic diagram of the structure of the connection between the push rod and the brake pedal provided in an embodiment of the utility model;

[0066] Fig.11 A schematic diagram of the structure of the artificial test chamber provided by the embodiment of the utility model;

[0067] Fig.12 A schematic diagram of the structure of a steering wheel testing tool provided in an embodiment of the utility model;

[0068] Fig.13 A schematic diagram of the structure of a motor bracket provided in an embodiment of the utility model.

[0069] in:

[0070] 1- front cabin;

[0071] 101-brake pedal; 102-electric hydraulic integrated brake control system; 103-master cylinder; 104-first branch pipe; 105-first valve; 106-second branch pipe; 107-support structure; 1071-three-way bracket; 1072-three-way; 1073, quick-change connector; 108-third branch pipe; 109-second valve; 110-fourth branch pipe; 111-caliper; 112-electric box; 113-oil collecting tank; 114-first frame; 115-caliper bracket; 1151-bracket motherboard; 1152-caliper support plate; 1153-sensor support plate; 1154-clamping force sensor; 116-hydraulic sensor; 117-caliper bracket mounting plate; 118-first bottom plate; 119-first caster; 120-fixed mounting plate;

[0072] 2-Automated test chamber;

[0073] 201-second frame; 202-first quick locking buckle; 203-pull plate; 204-push rod; 2041-ball structure; 2042-guard plate; 205-thrust sensor; 206-power device support frame; 207-second bottom plate; 208-second caster; 209-power device;

[0074] 3-Manual test chamber;

[0075] 301-third frame; 302-third base plate; 303-second quick locking buckle; 304-accelerator pedal assembly; 305-shift handle test fixture; 306-steering wheel test fixture; 3061-fixed connecting rod; 3062-connecting piece; 3063-angle adjustment side plate; 3064-steering wheel; 3065-arc connecting groove; 3066-motor; 3067-motor support end plate; 3068-connecting shaft; 3069-motor support base plate; 307-seat; 308-third caster. DETAILED DESCRIPTION

[0076] The utility model discloses a vehicle hydraulic brake system testing device, the test result is more real and reliable, the test quality is improved, the test cycle is shorter, and the test stability and repeatability are good.

[0077] 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.

[0078] See also Figures 1 to 13 The vehicle hydraulic brake system test device of the utility model includes a control unit and a hydraulic brake system test bench, and the hydraulic brake system test bench is communicatively connected to the control unit. The hydraulic brake system test bench includes a front cabin 1 and a rear cabin, and the front cabin 1 is provided with a hydraulic brake system to be tested, and the hydraulic brake system is communicatively connected to the control unit. The rear cabin includes an automated test cabin 2 and a manual test cabin 3 for providing braking force for the hydraulic brake system. The automated test cabin 2 is provided with an automatic test power source, and the automatic test power source drives the brake pedal 101 of the hydraulic brake system to brake.

[0079] The manual test chamber 3 requires the tester to implement the braking operation on the brake pedal 101 by stepping on it with his foot.

[0080] The vehicle hydraulic brake system test device of the utility model includes an automated test cabin 2 and a manual test cabin 3. The automated test cabin 2 realizes automatic testing of the hydraulic brake system, and the manual test cabin 3 realizes manual testing of the hydraulic brake system. The vehicle hydraulic brake system test device of the utility model can obtain test results under both manual and automatic test devices. Comparing the test results obtained by the two test devices can effectively avoid errors caused by excessive idealization of model simulation, meet the test personnel's testing, verification and evaluation of the hydraulic brake system, make the test results more real and reliable, and improve the quality of the test. The vehicle hydraulic brake system test device of the utility model realizes the performance test of the hydraulic brake system on the hydraulic brake system test bench. Compared with the actual vehicle test, the test cycle is shorter, the test stability and repeatability are better, and the test verification of dangerous or extreme working conditions can be completed.

[0081] Specifically, the front cabin 1 includes a first frame 114, a first base plate 118 is fixedly arranged on the first frame 114, an electric hydraulic integrated brake control system (IBC) 102 is installed on the first base plate 118, and a brake pedal 101 is connected to the electric hydraulic integrated brake control system 102. The master cylinder 103 is integrated with the electric hydraulic integrated brake control system 102, referring to Figure 3 and Figure 4 The two are integrated together according to the connection method of the original vehicle. The electric hydraulic integrated brake control system 102 is a structure in the prior art and will not be described here. In order to facilitate the installation of the electric hydraulic integrated brake control system 102, a fixed mounting plate 120 is provided on the first bottom plate 118, and the electric hydraulic integrated brake control system 102 is installed on the fixed mounting plate 120. The front cabin 1 also includes a caliper 111 and a hydraulic pipeline. The caliper 111 is installed on a caliper bracket 115 on the first frame 114, as shown in FIG. Figure 6 and Figure 7 As shown, a clamping force sensor 1154 is provided on the caliper bracket 115, and the caliper 111 contacts the clamping force sensor 1154 when clamping. The hydraulic pipeline is used to connect the master cylinder 103 and the caliper 111, and a hydraulic sensor 116 is provided on the hydraulic pipeline, and the hydraulic sensor 116 is connected to the control unit for communication.

[0082] Further, see Figure 3 and Figure 4, the hydraulic pipeline includes a first hydraulic branch pipe and a second hydraulic branch pipe. One end of the first hydraulic branch pipe is connected to the master cylinder 103, and the other end is connected to the hydraulic sensor 116. One end of the second hydraulic branch pipe is connected to the caliper 111, and the other end is connected to the hydraulic sensor 116. By setting the first hydraulic branch pipe and the second hydraulic branch pipe, the hydraulic oil in the master cylinder 103 is transported to the caliper 111. Among them, the first hydraulic branch pipe is provided with a first valve 105, and the second hydraulic branch pipe is provided with a second valve 109. When switching different test systems, the first valve 105 and the second valve 109 are closed and replaced to reduce system oil leakage.

[0083] In order to facilitate the installation of the hydraulic sensor 116, a support structure 107 is provided on the first bottom plate 118. The support structure 107 includes a three-way bracket 1071, such as Figure 5 As shown, the bottom of the three-way bracket 1071 is fixedly connected to the first bottom plate 118, and the top of the three-way bracket 1071 is fixedly connected with a three-way 1072. It can be understood that the three-way 1072 includes three openings, the first opening of the three-way 1072 is connected to the first hydraulic branch pipe, the second opening is connected to the second hydraulic branch pipe, and the third opening is connected to the hydraulic sensor 116. Among them, the hydraulic sensor 116 is connected to the bottom opening position of the three-way 1072, that is, the third opening is the bottom opening of the three-way 1072, mainly for the convenience of oil filling, and at the same time, the air in the cavity of the hydraulic sensor 116 can be exhausted during oil filling, thereby improving the working accuracy of the sensor.

[0084] In one embodiment, the first hydraulic branch pipe includes a first branch pipe 104 and a second branch pipe 106, which are respectively arranged on both sides of the first valve 105. The first branch pipe 104 connects the master cylinder 103 and the first valve 105, and the second branch pipe 106 connects the first valve 105 and the three-way 1072. The second hydraulic branch pipe includes a third branch pipe 108 and a fourth branch pipe 110, the third branch pipe 108 connects the three-way 1072 and the second valve 109, and the fourth branch pipe 110 connects the second valve 109 and the caliper 111. In order to facilitate supporting the first valve 105 and the second valve 109, the second branch pipe 106 and the third branch pipe 108 are hard pipes. In one embodiment, the second branch pipe 106 and the third branch pipe 108 are stainless steel hard pipes. The second branch pipe 106 supports the first valve 105, and the third branch pipe 108 supports the second valve 109. The first branch pipe 104 and the fourth branch pipe 110 are flexible pipes, which are convenient for adapting to different types of calipers 111. In order to facilitate disassembly and installation, the above pipe joints are quick joints. In order to limit the second branch pipe 106 and the third branch pipe 108, a quick-change joint 1073 for connecting and fixing the second branch pipe 106 and the third branch pipe 108 is provided on the tee 1072, which is convenient for quick replacement of the hard pipe when it is damaged.

[0085] There are a plurality of calipers 111, and each caliper 111 is mounted on a corresponding caliper bracket 115. Accordingly, each caliper 111 is mounted with the first hydraulic branch pipe and the second hydraulic branch pipe connected to each other. Figure 3 , four calipers 111 are provided. In order to collect hydraulic oil, caliper brackets 115 are all provided on caliper bracket mounting plates 117, and caliper bracket mounting plates 117 are fixedly connected to the first frame 114. An oil collecting tank 113 is provided below the caliper bracket mounting plates 117, and the oil collecting tank 113 is connected to the first frame 114. It can be understood that the caliper bracket mounting plates 117 are suspended on the top of the oil collecting tank 113.

[0086] In order to facilitate the installation of the caliper 111, the caliper bracket 115 includes a bracket main board 1151, a caliper support plate 1152 and a sensor support plate 1153. Figure 6 and Figure 7 As shown. The bracket main board 1151 is detachably connected to the caliper bracket mounting plate 117, and the detachable connection here is a bolt connection. The caliper support plate 1152 and the sensor support plate 1153 are fixedly connected to the bracket main board 1151, and the caliper 111 is connected to the caliper support plate 1152. The connection between the two is a detachable connection, which is convenient for replacing the caliper 111. The clamping force sensor 1154 is connected to the sensor support plate 1153, and the sensor support plate 1153 is installed at the position of the brake pad used in conjunction with the caliper 111, that is, the sensor support plate 1153 is installed in the middle of the caliper 111 at the original brake pad position. When the caliper 111 is in action, it contacts the clamping force sensor 1154, thereby measuring the clamping force of the caliper 111. It can be understood that in order to collect sensor signals, the clamping force sensor 1154 and the hydraulic sensor 116 are both communicatively connected to the control unit.

[0087] It should be noted that the layout in the front cabin 1 is mainly based on the actual vehicle for hydraulic pipeline connection and sensor layout. The brake pedal 101 is retained mainly to facilitate switching of test modes and facilitate the tester to step on the brake pedal 101 to evaluate the braking effect during manual testing.

[0088] In order to collect the hydraulic oil on the first bottom plate 118, the opening height of the oil collecting tank 113 is lower than the height of the first bottom plate 118, so as to collect the leaked oil generated when replacing the electric hydraulic integrated brake control system 102. The leaked hydraulic oil will be concentrated in the oil collecting tank 113 due to gravity. At the same time, oil-absorbing paper is laid on the upper surface of the first bottom plate 118 and in the oil collecting tank 113 to absorb the hydraulic oil on the stand.

[0089] In order to facilitate the movement of the front cabin 1, a first caster 119 is connected to the bottom end of the first frame 114. An electric box 112 is arranged on the first frame 114 to provide power for the equipment.

[0090] When replacing a different hydraulic brake system, close the first valve 105 and the second valve 109, disconnect the wiring harness of the electric hydraulic integrated brake control system 102, the wiring harness of the caliper 111, and the wiring harness of the clamping force sensor 1154, remove the bolts fixing the brake pedal 101 and the electric hydraulic integrated brake control system 102, unscrew the pipe joint to remove the brake pedal 101 and the electric hydraulic integrated brake control system 102, unscrew the bolts fixing the caliper bracket 115, and loosen the pipe joint of the fourth branch pipe 110, and then remove the caliper bracket 115 together with the caliper 111. After removing the original hydraulic brake system, you can install the new hydraulic brake system to be tested and the corresponding tooling, add hydraulic oil, and start testing.

[0091] The control unit includes a host computer and a HIL system. The host computer mainly deploys the test software and displays the data. The test software includes vehicle dynamics software, test management software and automated test software, and at the same time, the mechanical structure of the hydraulic brake system is modeled in detail. Through the control algorithm and simulation model of the host computer, it interacts with the HIL system, monitors the test or verification task online, and tests the hydraulic brake system. The HIL system uses a real-time simulation system, and internally installs boards that can realize various functions, mainly providing the controller, sensor, etc. with the switch signals and control signals required for normal operation, based on the hardware platform and the host computer software, etc. The bus and hard-wire signals required by the simulation controller, at the same time, can collect the hydraulic pressure of the test bench end pipeline, the clamping force of the caliper 111, and the thrust of the brake pedal 101, etc., and transmit them to the vehicle model of the host computer, thereby realizing the closed-loop simulation test of the hydraulic brake system. And it can inject faults into some signals of the controller during the closed-loop simulation test to realize fault simulation, such as short circuit, open circuit, virtual connection and other faults, to realize the fault diagnosis test of the hydraulic brake system. All information will be displayed and recorded in real time on the host computer. At the same time, the tester can control the HIL system and test bench through the host computer to test the performance of the hydraulic brake system and its related functions.

[0092] In one embodiment, the automated test chamber 2 includes a power device 209, a push rod 204, and a thrust sensor 205. The power device 209 is the power source for the automated test. The power output end of the power device 209 moves linearly. One end of the push rod 204 is connected to the power output end of the power device 209, and the other end is slidably connected to the brake pedal 101. The thrust sensor 205 is disposed at the connection position between the power device 209 and the push rod 204. The power device 209 provides a power source for the entire automated test. The push rod 204 is used to push the brake pedal 101 to achieve braking. The thrust sensor 205 is used to detect the magnitude of the thrust. The thrust sensor 205 is communicatively connected to the HIL system of the control unit.

[0093] Furthermore, the automated test chamber 2 also includes a second frame 201, such as Figure 8 and Fig. 9 As shown, a second base plate 207 is fixedly connected to the second frame 201, and a power device 209 is arranged on the second base plate 207. Specifically, the power device 209 is an electric cylinder or a linear motor. The power device 209 is arranged on the power device support frame 206, and a pull plate 203 is arranged near the front cabin 1 of the support frame 206. The pull plate 203 is connected to the fixed mounting plate 120, so that the structure of the fixed power device 209 is fastened together with the fixed structure of the IBC to prevent the automated test cabin 2 from pushing the front cabin 1 open when the power device 209 is working, so that a gap is generated between the two cabins, which affects the control of the distance of the output shaft of the power device 209. In order to improve the reliability of the connection, two pull plates 203 are arranged, and the two pull plates 203 are symmetrically arranged on both sides of the power device 209. The power device 209 is fixed in the second frame 201, providing a power source for the entire automated test, and the output torque, speed and the distance of the push rod 204 extending are controlled by the host computer. A thrust sensor 205 is provided at the front of the output shaft of the power unit 209. The thrust sensor 205 collects the magnitude of thrust through the HIL system for detection and analysis, and transmits it to the host computer through signal conversion to provide data input for the vehicle model.

[0094] In one embodiment, the end of the push rod 204 for connecting with the brake pedal 101 is provided with a spherical structure 2041, and the spherical surface of the spherical structure 2041 contacts the pedal arm of the brake pedal 101. Fig.10 The surface where the push rod 204 contacts the pedal arm of the brake pedal 101 is a spherical surface, so that the movement of the push rod 204 toward the front cabin 1 can be converted into the downward movement of the brake pedal 101 through the contact of the spherical surface. In order to improve the stability of the pushing process of the spherical structure 2041, guard plates 2042 are provided on both sides of the spherical structure 2041, and the pedal arm is provided between the guard plates 2042 on both sides. The brake pedal 101 moves downward along the pedal rotation axis by limiting the pedal arm by the guard plates 2042 on both sides. When the push rod 204 moves in the direction away from the front cabin 1, the brake pedal 101 returns to its original position through its own return spring.

[0095] Furthermore, a locking and limiting structure is provided on one side of the second frame 201 close to the first frame 114, which is used to lock and fix the front cabin 1 and the automated test cabin 2 together. Specifically, the locking and limiting structure is a first quick locking buckle 202. Specifically, the first quick locking buckles 202 are provided at the four corner positions of the second frame 201 close to the first frame 114, and the first quick locking buckles 202 fasten the second frame 201 and the first frame 114 together, further preventing a gap from being generated between the front cabin 1 and the automated test cabin 2, and ensuring the output stability of the power device 209.

[0096] In order to facilitate the movement of the automated test cabin 2 , a second caster 208 is connected to the bottom end of the second frame 201 .

[0097] In one embodiment, the artificial test cabin 3 includes a third frame 301, a seat 307, a steering wheel test fixture 306, a shift handle test fixture 305 and an accelerator pedal assembly 304. The seat 307 is fixedly arranged on the third base plate 302 on the third frame 301, and the third base plate 302 is fixedly arranged on the third frame 301. The steering wheel test fixture 306 is installed on the third frame 301, and the shift handle test fixture 305 and the accelerator pedal assembly 304 are both installed on the third base plate 302. The setting positions of the seat 307, the steering wheel test fixture 306, the shift handle test fixture 305 and the accelerator pedal assembly 304 are all set with reference to the actual vehicle. The seat 307 is convenient for the tester to sit, and steps can be set to facilitate the tester to get on and off the seat 307. The steering wheel test fixture 306, the shift handle test fixture 305 and the accelerator pedal assembly 304 are set to simulate the cockpit of the actual vehicle, so that the tester has a more realistic test experience. The third frame 301 is provided with a third caster 308 at the bottom to facilitate the movement of the manual test chamber 3. The third frame 301 is provided with a second quick locking buckle 303 to facilitate quick connection with the first frame 114 for manual testing. The shift handle test fixture 305 and the accelerator pedal assembly 304 are both existing test mechanisms and will not be described in detail here.

[0098] The steering wheel test fixture 306 includes a fixed link 3061, a motor bracket, a motor 3066 and a steering wheel 3064. The fixed link 3061 is connected to the third frame 301; the motor bracket is connected to the fixed link 3061; the motor 3066 is connected to the motor bracket; and the steering wheel 3064 is connected to the power output end of the motor 3066. In order to facilitate the adjustment of the angle of the steering wheel 3064 relative to the ground, the motor bracket includes a motor support bottom plate 3069, a motor support end plate 3067 and an angle adjustment side plate 3063, wherein the angle adjustment side plate 3063 is fixedly connected to the lower surface of the motor support bottom plate 3069, and the motor support end plate 3067 is arranged on the upper surface of the motor support bottom plate 3069. The motor bracket is rotatably arranged on the through hole of the fixed link 3061 through the connecting shaft 3068. There are two motor support end plates 3067, which are arranged at both ends of the motor support bottom plate 3069 and are used to support and limit the motor 3066. The motor support end plates 3067 are arranged corresponding to the ends of the motor 3066. The angle adjustment side plates 3063 are arranged on both sides of the motor support bottom plate 3069. The angle adjustment side plates 3063 are rotatably connected to the fixed connecting rod 3061 through the connecting shaft 3068. In order to facilitate the adjustment of the angle between the steering wheel 3064 and the ground, the angle adjustment side plates 3063 are arranged at positions corresponding to the fixed connecting rod 3061. In order to limit the installation angle of the steering wheel 3064, the angle adjustment side plates 3063 and the fixed connecting rod 3061 are connected through the connecting piece 3062 connected in the arc-shaped connecting groove 3065. The connecting piece 3062 is a connecting bolt, and the tail end of the connecting bolt is locked and positioned by a nut. Loosen the connecting bolts and adjust the angle of the steering wheel 3064 relative to the ground to make the tester more natural and comfortable during the test.

[0099] During manual testing, the tester turns the steering wheel 3064 to drive the motor 3066 to output a specific rotation angle of the steering wheel 3064, which is input into the vehicle dynamics model of the host computer. At the same time, the host computer controls the motor 3066 to output a rotational reaction force to the steering wheel 3064 to simulate the road feel, making the manual test more accurate.

[0100] Automatic testing process:

[0101] a. Install the components of the hydraulic brake system to be tested in the front cabin 1 according to the layout on the actual vehicle, and establish a connection with the HIL system through power supply and CAN communication interface, so that the host computer can read the pressure value of the hydraulic sensor 116, the clamping force of the clamping force sensor 1154 and the real-time information of the electric hydraulic integrated brake control system 102 in real time. Connect and fasten the front cabin 1 and the automated test cabin 2 through the first quick locking buckle 202 and the pull plate 203, and establish a connection between the power device 209 and the thrust sensor 205 and the HIL system through power supply and CAN communication interface;

[0102] b. Connecting the host computer to the HIL system via Ethernet communication, so that the host computer can obtain the required pressure, caliper clamping force, brake thrust, brake stroke, and IBC information, and initialize the entire system through the host computer;

[0103] c. Set the vehicle dynamics model in the upper computer software and set the basic vehicle information, such as the vehicle curb weight, tire parameters, brake pressure-brake torque curve of the brake system, etc., so that the test results are closer to the actual vehicle test results; download the test model to the HIL system, and the HIL system sends the command signal;

[0104] d. When conducting the automatic driving test, the host computer can automatically control the displacement, speed, thrust, etc. of the output shaft of the power unit 209, automatically complete the braking action of the simulated vehicle in different scenarios, and can test the functions related to the braking system, such as the Electronic Stability Program (ESP), Emergency Brake Assist (EBA), and Auto Emergency Braking (AEB). After the power unit 209 is activated, the collected information of the hydraulic sensor 116, the thrust sensor 205, the clamping force sensor 1154, and the IBC are transmitted to the corresponding interface of the dynamic model in real time to realize the braking of the dynamic model, and then activate the ABS and other functions of the controller. The tester can view the driving posture and real-time simulation data of the real vehicle model in various scenarios on the display. At the same time, the host computer automatically records the communication signals and various sensor signals corresponding to this use case, including: working voltage, motor current, IBC information, hydraulic sensor pressure value, thrust sensor thrust value, clamping force of the clamping force sensor, etc. The data recorded in this section can reflect the performance of the hydraulic brake system components under various scenarios such as different weather conditions, different road conditions, and different driving speeds;

[0105] e. Repeat step d according to the test requirements until all test conditions are tested, and save the data to obtain the test report.

[0106] Manual testing process by testers:

[0107] a. The main steps are the same as step a of the automated test, except that the front cabin 1 and the manual test cabin 3 need to be fastened by the second quick locking buckle 303, and the motor 3066, the accelerator pedal assembly 304, and the shift handle test fixture 305 are connected to the HIL system through the power supply and CAN communication interface;

[0108] b. Connect the host computer to the HIL system through Ethernet communication, so that the host computer can obtain the required pressure, caliper clamping force, brake pedal and accelerator pedal travel, IBC information, steering wheel angle information, shift handle information, and initialize the entire system through the host computer;

[0109] c. Set the vehicle dynamics model in the upper computer software and set the basic vehicle information, such as the vehicle curb weight, tire parameters, brake pressure-brake torque curve of the brake system, etc., so that the test results are closer to the actual vehicle test results; download the test model to the HIL system, and the HIL system sends the command signal;

[0110] d. The tester manually turns the steering wheel 3064, controls the shift handle, and steps on the brake pedal 101 to perform a real driving test, completing the input of the signals required by the vehicle model. After the above actions are generated, the collected hydraulic sensor 116, thrust sensor 205, clamping force sensor 1154, steering wheel angle information, shift handle information, and IBC information are transmitted to the corresponding interface of the dynamic model in real time to realize the braking and steering of the dynamic model, thereby activating the function of the controller. The test scenarios and functions involved are the same as those of the automated test, and the host computer will also record the corresponding data, which is convenient for comparison with the data during the automated test.

[0111] e. Repeat step d according to the test requirements until all test conditions are tested, and save the data to obtain the test report.

[0112] The vehicle model involved in the automated test is the same as that of the manual test by the tester, and both require steering wheel angle information, accelerator pedal information, shift handle information, brake pedal travel information, IBC information, hydraulic sensor and clamping force sensor information. The difference is that in the automated test, the steering wheel angle information, accelerator pedal information, and shift handle information are automatically input by the host computer software, and the remaining information is actually provided by the sensor, IBC component, power unit 209, etc.; while in the manual test by the tester, all the information is actually input.

[0113] The vehicle hydraulic brake system test device of the utility model can complete various working condition tests of the hydraulic brake system, including functions related to the brake system, such as ESP, EBA, AEB, etc.; it can complete the tests of various dangerous tools and extreme working conditions; it can realize fault injection of some signals of the controller to realize fault simulation, and realize the fault diagnosis test of the hydraulic brake system. The vehicle hydraulic brake system test device of the utility model can complete the repeated test and working condition reproduction of each test condition; it can realize system automation test and high-precision test; it can carry out artificial real driving simulation test of the test personnel, truly feel and test and record the performance of the hydraulic brake system, and by comparing the two test methods, the authenticity of the test results can be enhanced. The vehicle hydraulic brake system test device of the utility model is jointly debugged with other controllers or systems in the chassis domain, and can complete the joint debugging with other domains of the vehicle such as the power domain, cockpit domain, automatic driving domain and body domain, and carry out the whole vehicle HIL hardware in the loop test. The vehicle hydraulic brake system test device of the utility model has a simple structure, is easy to move, and is easy to install. It can adapt to different models and sizes of hydraulic brake system components to be tested, and has a wide adaptability.

[0114] In the description of this solution, it should be understood that the terms "upper", "lower", "vertical", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this solution.

[0115] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of this solution, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0116] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0117] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A vehicle hydraulic brake system testing device, characterized in that: include: Control unit; A hydraulic brake system test bench, in communication connection with the control unit; The hydraulic brake system test bench includes a front cabin and a rear cabin. The front cabin is provided with a hydraulic brake system to be tested, and the hydraulic brake system is communicatively connected with the control unit; the rear cabin includes an automated test cabin and a manual test cabin for providing braking force for the hydraulic brake system, and the automated test cabin is provided with an automatic test power source for driving the brake pedal of the hydraulic brake system.

2. The vehicle hydraulic brake system testing device according to claim 1, characterized in that: The front cabin comprises: First frame; Brake pedal; An electro-hydraulic integrated brake control system is mounted on a first base plate on the first frame, and the brake pedal is connected to the electro-hydraulic integrated brake control system; A master cylinder, integrated in the electro-hydraulic integrated brake control system; A caliper, mounted on a caliper bracket on the first frame, the caliper bracket being provided with a clamping force sensor, and the caliper contacts the clamping force sensor when clamping; A hydraulic pipeline, connecting the master cylinder and the caliper, wherein a hydraulic sensor is provided on the hydraulic pipeline; The hydraulic pressure sensor is communicatively connected to the control unit.

3. The vehicle hydraulic brake system testing device according to claim 2, characterized in that: The hydraulic pipeline includes a first hydraulic branch pipe and a second hydraulic branch pipe, one end of the first hydraulic branch pipe is connected to the master cylinder, and the other end is connected to the hydraulic sensor, and one end of the second hydraulic branch pipe is connected to the caliper, and the other end is connected to the hydraulic sensor; The first hydraulic branch pipe is provided with a first valve, and the second hydraulic branch pipe is provided with a second valve.

4. The vehicle hydraulic brake system testing device according to claim 3, characterized in that: A supporting structure for mounting the hydraulic sensor is provided on the first bottom plate; The support structure includes a three-way bracket, a three-way bracket is fixedly connected to the three-way bracket, a first opening of the three-way bracket is connected to the first hydraulic branch pipe, a second opening is connected to the second hydraulic branch pipe, and a third opening is connected to the hydraulic sensor The first hydraulic branch pipe includes a first branch pipe and a second branch pipe, the first branch pipe connects the master cylinder with the first valve, and the second branch pipe connects the first valve with the three-way connection; The second hydraulic branch pipe includes a third branch pipe and a fourth branch pipe, the third branch pipe connects the tee and the second valve, and the fourth branch pipe connects the second valve and the caliper; The first branch pipe and the fourth branch pipe are soft pipes, and the second branch pipe and the third branch pipe are hard pipes.

5. The vehicle hydraulic brake system testing device according to claim 2, characterized in that: The caliper bracket is arranged on a caliper bracket mounting plate, and the caliper bracket mounting plate is fixedly connected to the first frame; The caliper bracket includes a bracket main board, a caliper support plate and a sensor support plate, the bracket main board is fixedly connected to the caliper bracket mounting plate, the caliper support plate and the sensor support plate are fixedly connected to the bracket main board, and the sensor support plate is installed at the position of the brake pad used in conjunction with the caliper; The caliper is connected to the caliper support plate, and the clamping force sensor is connected to the sensor support plate.

6. The vehicle hydraulic brake system testing device according to claim 5, characterized in that: An oil collecting tank is provided below the caliper bracket mounting plate, and the oil collecting tank is connected to the first frame; The opening height of the oil collecting tank is lower than the height of the first bottom plate; Oil absorbing paper is laid on the bottom of the oil collecting tank and the first bottom plate.

7. The vehicle hydraulic brake system testing device according to claim 1, characterized in that: The automated test chamber comprises: A power device is the automatic test power source, and the power output end of the power device moves linearly; A push rod, one end of which is connected to the power output end of the power device, and the other end of which is slidably connected to the brake pedal; A thrust sensor is arranged at a connection position between the power device and the push rod; The thrust sensor is communicatively connected to the control unit.

8. The vehicle hydraulic brake system testing device according to claim 7, characterized in that: The automated test cabin further comprises a second frame, a second bottom plate is fixedly connected to the second frame, and the power device is arranged on the second bottom plate; The end of the push rod used for connecting with the brake pedal is provided with a spherical structure, and the spherical surface of the spherical structure contacts the pedal arm of the brake pedal; Guard plates are arranged on both sides of the spherical structure, and the pedal arm is arranged between the guard plates on both sides; The power device is an electric cylinder or a motor; A locking and limiting structure is provided on one side of the second frame for connecting with the front cabin.

9. The vehicle hydraulic brake system testing device according to claim 1, characterized in that: The artificial test chamber comprises: A seat, fixedly arranged on a third bottom plate, wherein the third bottom plate is arranged on a third frame; A steering wheel test fixture, installed on the third frame; A shift handle test fixture, installed on the third base plate; an accelerator pedal assembly, mounted on the third base plate; The setting positions of the seat, steering wheel test fixture, shift handle test fixture and accelerator pedal assembly are all referenced to the actual vehicle settings.

10. The vehicle hydraulic brake system testing device according to claim 9, characterized in that: The steering wheel test fixture comprises: A fixed connecting rod connected to the third frame; A motor bracket connected to the fixed link; A motor connected to the motor bracket; A steering wheel connected to the power output end of the motor; The motor bracket includes a motor support bottom plate, a motor support end plate and an angle adjustment side plate, wherein the motor support end plate is arranged at both ends of the motor support bottom plate, the motor support end plate is arranged corresponding to the end of the motor, the angle adjustment side plate is arranged at both sides of the motor support bottom plate, and the angle adjustment side plate is connected to the fixed connecting rod; An arc-shaped connecting groove is provided at a position corresponding to the fixed connecting rod, and the angle-adjusting side plate and the fixed connecting rod are connected via a connecting piece connected in the arc-shaped connecting groove.

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