CN215204841U - Automobile line control electronic hydraulic brake system - Google Patents
Automobile line control electronic hydraulic brake system Download PDFInfo
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- CN215204841U CN215204841U CN202121081386.5U CN202121081386U CN215204841U CN 215204841 U CN215204841 U CN 215204841U CN 202121081386 U CN202121081386 U CN 202121081386U CN 215204841 U CN215204841 U CN 215204841U
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Abstract
An automobile line control electronic hydraulic brake system comprises a hydraulic pump assembly of a high-pressure accumulator, a hydraulic control unit, an electronic control unit and an ABS/ESC unit; the hydraulic control unit comprises a sensor group, a liquid storage tank, a main cylinder, a pedal simulator, a normally closed electromagnetic valve group and a normally open electromagnetic valve group; the sensor group is in signal connection with the electronic control unit and comprises a high-pressure accumulator pressure sensor and a displacement sensor; the normally closed electromagnetic valve group comprises a first path of pressurizing normally closed electromagnetic valve, a second path of pressurizing normally closed electromagnetic valve, a first path of pressure reducing normally closed electromagnetic valve, a second path of pressure reducing normally closed electromagnetic valve and a second-stage normally closed electromagnetic valve; the normally open electromagnetic valve group comprises a first normally open electromagnetic valve and a second normally open electromagnetic valve which are arranged between the master cylinder and the ABS/ESC unit. Therefore, the automobile line control electronic hydraulic brake system can replace a traditional vacuum booster brake system, and realize a conventional brake function and an active brake function.
Description
Technical Field
The utility model relates to a braking system of car, in particular to car drive-by-wire electron hydraulic braking system (EHB).
Background
The traditional hydraulic braking system adopts a structure that a vacuum booster is added with a braking main cylinder, and along with the rapid development of new energy automobiles and intelligent driving, the traditional hydraulic braking system can not meet the requirements. The automobile line control electronic hydraulic brake system (EHB) can be better applied to new energy automobiles and traditional fuel automobiles, and can realize the functions of brake energy recovery, intelligent driving, unmanned driving and the like. How to provide a better braking experience is becoming a direction in which practitioners strive to increase.
Disclosure of Invention
The utility model aims to solve the technical problem that a can solve the car drive-by-wire electron hydraulic braking system of the vacuum booster of cancellation traditional braking is provided. The utility model discloses a car drive-by-wire electron hydraulic braking system uses high pressure accumulator as the braking pressure source, with solenoid valve control brake pressure's size, can realize the initiative braking function, with other car parts cooperation on the basis of the initiative braking function, can realize functions such as braking energy recovery, intelligent driving, unmanned driving.
The utility model discloses an automobile wire control electronic hydraulic braking system, which comprises a hydraulic pump assembly, a hydraulic control unit, an electronic control unit and an ABS/ESC unit; the hydraulic pump assembly includes a high pressure accumulator; the hydraulic control unit comprises a sensor group, a normally closed electromagnetic valve group controlled to be opened and closed by the electronic control unit, a liquid storage tank, a main cylinder, a pedal simulator capable of obtaining pedal sensing feedback, and a normally open electromagnetic valve group controlled to be opened and closed by the electronic control unit; the sensor group is in signal connection with the electronic control unit and comprises a high-pressure energy accumulator pressure sensor for measuring the pressure in the high-pressure energy accumulator and a displacement sensor for measuring the displacement of a piston rod in the master cylinder; the normally closed electromagnetic valve group comprises a first path of pressurization normally closed electromagnetic valve arranged between the high-pressure energy accumulator and the ABS/ESC unit, a second path of pressurization normally closed electromagnetic valve arranged between the high-pressure energy accumulator and the ABS/ESC unit, a first path of pressure reduction normally closed electromagnetic valve arranged between the liquid storage tank and the ABS/ESC unit, a second path of pressure reduction normally closed electromagnetic valve arranged between the liquid storage tank and the ABS/ESC unit, and a second-stage normally closed electromagnetic valve arranged between the master cylinder and the pedal simulator; the normally open electromagnetic valve group comprises a first normally open electromagnetic valve arranged between the master cylinder and the ABS/ESC unit and a second normally open electromagnetic valve arranged between the master cylinder and the ABS/ESC unit.
In an alternative embodiment, the first path of normally closed solenoid pressure increasing valve and the second path of normally closed solenoid pressure increasing valve are both two normally closed solenoid pressure increasing valves connected in parallel, and the first path of normally closed solenoid pressure reducing valve and the second path of normally closed solenoid pressure reducing valve are both two normally closed solenoid pressure reducing valves connected in parallel.
In an alternative embodiment, the first path of normally closed solenoid pressure increasing valve, the second path of normally closed solenoid pressure increasing valve, the first path of normally closed solenoid pressure reducing valve and the second path of normally closed solenoid pressure reducing valve are all linear solenoid valves.
In an alternative embodiment, the hydraulic pump assembly further comprises a plunger pump and a motor in signal connection with the electronic control unit and capable of supplying brake fluid to the high-pressure accumulator to a set threshold value or not supplying brake fluid to the high-pressure accumulator.
In an alternative embodiment, the high pressure accumulator pressure sensor is disposed between the high pressure accumulator and the plunger pump.
In an alternative embodiment, the high-pressure accumulator brakes the vehicle through brake fluid, and the ABS/ESC unit is provided with an ABS/ESC outlet, an MC1 outlet and an MC2 outlet; the hydraulic pump assembly is connected with the hydraulic control unit through an oil pipe, and the electronic control unit is installed on the hydraulic control unit through a bolt.
In an alternative embodiment, the sensor group further comprises an MC1 outlet port pressure sensor disposed between the MC1 outlet port and the high pressure accumulator, and a pedal master cylinder pressure sensor measuring the pressure in the pedal master cylinder in the master cylinder.
In an alternative embodiment, the first path of normally closed solenoid pressure increasing valves is arranged between the high-pressure accumulator and the MC1 path oil outlet, the second path of normally closed solenoid pressure increasing valves is arranged between the high-pressure accumulator and the MC2 path oil outlet, the first path of normally closed solenoid pressure reducing valves is arranged between the liquid storage tank and the MC1 path oil outlet, the second path of normally closed solenoid pressure reducing valves is arranged between the liquid storage tank and the MC2 path oil outlet, the first normally open solenoid valve is arranged between the master cylinder and the MC1 path oil outlet, and the second normally open solenoid valve is arranged between the master cylinder and the MC2 path oil outlet.
The utility model discloses a car drive-by-wire electron hydraulic braking system can replace traditional vacuum booster braking system, realizes conventional braking function and realizes initiative braking function.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic diagram schematically illustrating some components, connection relationships and hydraulic principles of the electric hydraulic brake system by wire control of the present invention.
Fig. 2 is a perspective view schematically illustrating an external shape and a configuration of a hydraulic control unit of the automotive wire-controlled electronic hydraulic brake system according to the present invention.
Fig. 3 is a schematic perspective view, which mainly illustrates the mounting structure of the electronic control unit of the automotive wire-controlled electronic hydraulic brake system of the present invention.
Reference numerals:
1. the polishing and drilling device comprises a workbench, 2, a supporting frame, 3, a polishing and drilling device, 4, a positioning and moving device, 5, a drilling unit, 6, a polishing unit, 7, a power unit, 8, a tee pipe fitting, 9, an outer polishing wheel, 10, an inner polishing wheel, 11, a rotating motor, 12, a connecting disc, 13, an output shaft, 14, a connecting strip, 15, a connecting groove, 16, a moving base, 17, a rotating disc, 18, a clamping piece, 19, a moving groove, 20, a pulley, 21, a rotating shaft, 22, a connecting block, 23 and a fastening bolt.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
The invention will be further described with reference to the accompanying drawings.
The utility model provides a following technical scheme:
referring to fig. 1 and 2, the electric hydraulic brake by wire system (EHB) of the present invention includes a hydraulic pump assembly, a Hydraulic Control Unit (HCU), an Electronic Control Unit (ECU)24, and an ABS/ESC unit. The ABS/ESC unit has ABS/ESC, MC1 oil outlet port 01 (corresponding to pipe 22 in FIG. 1), and MC2 oil outlet port 02 (corresponding to pipe 23 in FIG. 1). The hydraulic pump assembly is connected with the hydraulic control unit through an oil pipe, and the electronic control unit 24 is installed on the hydraulic control unit through a bolt connection.
The hydraulic pump assembly mainly comprises a high-pressure energy accumulator 1, a plunger pump 3 and a motor 4 which is in signal connection with the electronic control unit 24 and can supplement brake fluid for the high-pressure energy accumulator 1 to a set threshold value or not supplement the brake fluid for the high-pressure energy accumulator 1.
The hydraulic control unit comprises a sensor group, a normally closed electromagnetic valve group controlled to be opened and closed by the electronic control unit 24, a liquid storage tank 14, a master cylinder 15, a pedal simulator 18 capable of obtaining normal pedal sensing feedback, and a normally open electromagnetic valve group controlled to be opened and closed by the electronic control unit 24.
The sensor group is in signal connection with the electronic control unit 24, and comprises a high-pressure accumulator pressure sensor 2 for measuring the pressure in the high-pressure accumulator 1, an MC1 oil outlet 01 pressure sensor 13 arranged between the MC1 oil outlet 01 and the high-pressure accumulator 1, a displacement sensor 16 for measuring the displacement of a piston rod in the master cylinder 15, and a pedal master cylinder pressure sensor 20 for measuring the pressure in a pedal master cylinder in the master cylinder 15. The high-pressure accumulator pressure sensor 2 is arranged between the high-pressure accumulator 1 and the plunger pump 3.
The normally closed electromagnetic valve group comprises a first path of pressurization normally closed electromagnetic valve arranged between the high-pressure energy accumulator 1 and the MC1 path oil outlet 01, a second path of pressurization normally closed electromagnetic valve arranged between the high-pressure energy accumulator 1 and the MC2 path oil outlet 02, a first path of pressure reduction normally closed electromagnetic valve arranged between the liquid storage tank 14 and the MC1 path oil outlet 01, a second path of pressure reduction normally closed electromagnetic valve arranged between the liquid storage tank 14 and the MC2 path oil outlet 02, and a second-stage normally closed electromagnetic valve 17 arranged between the master cylinder 15 and the pedal simulator 18.
In this embodiment, the first path of normally closed pressure-increasing electromagnetic valve and the second path of normally closed pressure-increasing electromagnetic valve are respectively two normally closed pressure-increasing electromagnetic valves 5-6 and 7-8 connected in parallel, and the first path of normally closed pressure-reducing electromagnetic valve and the second path of normally closed pressure-reducing electromagnetic valve are respectively two normally closed pressure-reducing electromagnetic valves 9-10 and 11-12 connected in parallel. The pressure-increasing normally closed solenoid valves 5 to 8 and the pressure-reducing normally closed solenoid valves 9 to 12 are linear solenoid valves, and linear control can be realized.
The normally open electromagnetic valve group comprises a normally open electromagnetic valve 19 arranged between the master cylinder 15 and the oil outlet 01 of the MC1 path, and a normally open electromagnetic valve 21 arranged between the master cylinder 15 and the oil outlet 02 of the MC2 path.
When a driver presses a brake pedal to brake, the displacement sensor 16 feeds a brake pedal displacement signal back to the electronic control unit 24, the electronic control unit 24 judges the brake intention of the driver according to the displacement signal fed back by the displacement sensor 16, the electronic control unit 24 controls the boosting normally closed electromagnetic valve 5-8, the pressure reducing normally closed electromagnetic valve 9-12, the normally open electromagnetic valves 19 and 21 and the secondary normally closed electromagnetic valve 17 to work, brake fluid in the high-pressure energy accumulator 1 enters the ABS/ESC through the boosting normally closed valve 5-8 and then enters the vehicle wheel cylinder to realize braking, and when the driver releases the brake pedal, the brake fluid in the vehicle wheel cylinder returns to the liquid storage tank through the pressure reducing normally closed valve 9-12 and the secondary normally closed electromagnetic valve 17 to complete the whole braking process. The utility model discloses a car drive-by-wire electron hydraulic braking system also can realize the initiative braking function. The working principle of the system is that the ECU receives a signal that the vehicle needs to be actively braked, the ECU controls the pressurization normally closed electromagnetic valve, the pressure reduction normally closed electromagnetic valve, the normally open electromagnetic valve and the two-stage normally closed electromagnetic valve to work, brake fluid of the high-pressure accumulator enters the ABS/ESC through the pressurization normally closed electromagnetic valve and then enters the vehicle wheel cylinder to realize braking, and after braking is completed, the brake fluid in the vehicle wheel cylinder returns to the liquid storage tank through the pressure reduction normally closed electromagnetic valve to complete the whole braking process.
The specific implementation details are as follows: the electronic control unit 24 receives the displacement signal fed back by the displacement sensor 16, judges the braking intention of the driver according to the displacement signal, opens the secondary normally closed electromagnetic valve 17, steps on the brake pedal to push the brake fluid of the master cylinder 15 to enter the pedal simulator 18 through the secondary normally closed electromagnetic valve 17, and the pedal simulator 18 works to enable the driver to obtain normal pedal feeling feedback. And when the secondary normally closed solenoid valve 17 is opened, the normally open solenoid valve 19 and the normally open solenoid valve 21 are closed, so that the brake fluid of the master cylinder 15 is prevented from entering the MC1 oil outlet 01 and the MC2 oil outlet 02 to influence the pedal feeling and the braking function. Opening the normally closed solenoid valve 17, closing the normally open solenoid valve 19 and the normally open solenoid valve 21, and simultaneously opening the pressurization normally closed solenoid valves 5-8, the brake fluid in the high-pressure accumulator 1 is divided into two paths, one path passes through the first path of pressurization normally closed solenoid valve, namely after the pressurization normally closed solenoid valves 5 and 6, enters the corresponding oil inlet of the ABS/ESC through the path of MC1 oil outlet 01, the other path passes through the second path of pressurization normally closed solenoid valve, namely after the pressurization normally closed solenoid valves 7 and 8, enters the corresponding oil inlet of the ABS/ESC through the path of MC2 oil outlet 02, and finally, the brake fluid from the high-pressure accumulator enters the wheel cylinder of the vehicle through the ABS/ESC to realize braking.
According to the displacement signal fed back by the displacement sensor 16 and the pressure signals of all the parts fed back by the high-pressure accumulator pressure sensor 2, the MC1 oil outlet 01 pressure sensor 13 and the pedal master cylinder pressure sensor 20, the electronic control unit 24 controls the opening and closing of all the electromagnetic valves, and the system can output linear brake pressure.
When the driver releases the brake pedal to finish braking, the electronic control unit 24 judges the intention of the driver to finish braking according to the displacement signal fed back by the displacement sensor 16, at this time, the pressure-increasing normally closed electromagnetic valve 5-8 is powered off and closed, the pressure-reducing normally closed electromagnetic valve 9-12 is powered on and opened, the wheel cylinder brake fluid returns to the liquid storage tank 14 through the pressure-reducing normally closed electromagnetic valve 9-12, the normally open electromagnetic valve 19 and the normally open electromagnetic valve 21 are powered on and closed, the second-stage normally closed electromagnetic valve 17 is powered on and opened, and the brake fluid in the pedal simulator 18 returns to the liquid storage tank 14 through the master cylinder 15 via the second-stage normally closed electromagnetic valve 17. After the brake fluid returns to the reservoir tank 14, the electronic control unit 24 shuts down all the solenoid valves to complete the conventional braking.
After braking or emergency braking for several times, when the pressure of the high-pressure energy accumulator 1 is reduced to the set threshold value, the high-pressure energy accumulator pressure sensor 2 feeds back the pressure value of the high-pressure energy accumulator 1 to the electronic control unit 24, the electronic control unit 24 gives an instruction to the motor 4, the motor 4 drives the plunger pump 3 to work to supplement brake fluid for the high-pressure energy accumulator 1, after the pressure of the high-pressure energy accumulator 1 is recovered to the set threshold value, the high-pressure energy accumulator pressure sensor 2 feeds back the pressure value of the high-pressure energy accumulator 1 to the electronic control unit 24, and the electronic control unit 24 gives the instruction to the motor 4 to stop working.
When an electronic control unit 24 receives an active braking request signal sent by a vehicle, the electronic control unit 24 controls the electromagnetic valves to work, the normally open electromagnetic valves 19 and 21 are electrified to be closed, the normally closed booster electromagnetic valves 5-8 are electrified to be opened, brake fluid in the high-pressure energy accumulator 1 is divided into two paths, one path of brake fluid passes through the normally closed booster electromagnetic valve of the first path, namely the normally closed booster electromagnetic valve 5 and 6 and then enters an oil inlet corresponding to the ABS/ESC through the oil outlet 01 of the MC1 path, the other path of brake fluid passes through the normally closed booster electromagnetic valve of the second path, namely the normally closed booster electromagnetic valve 7 and 8 and then enters an oil inlet corresponding to the ABS/ESC through the oil outlet 02 of the MC2 path, and finally the brake fluid from the high-pressure energy accumulator 1 enters a vehicle wheel cylinder through the ABS/ESC to realize braking.
After the braking target is finished, the boosting normally closed electromagnetic valves 5-8 are powered off and closed, the normally open electromagnetic valves 19 and 21 are powered on and closed, the pressure reducing normally closed electromagnetic valves 9-12 are powered on and opened, wheel cylinder brake fluid returns to the liquid storage tank 14 through the pressure reducing normally closed electromagnetic valves 9-12, and after the brake fluid returns to the liquid storage tank 14, the electronic control unit 24 is powered off for all the electromagnetic valves, so that the active braking is finished.
When the system is powered off and manual emergency braking is needed, a driver steps on a brake pedal to push the master cylinder 15 to move, the secondary normally closed electromagnetic valve 17 is powered off and is in a normally closed state, the normally open electromagnetic valves 19 and 21 are powered off and are in a normally open state, brake fluid from the master cylinder 15 reaches the MC1 path oil outlet 01 and the MC2 path oil outlet 02 through the normally open electromagnetic valves 19 and 21 and then enters an oil inlet corresponding to the ABS/ESC, and finally the brake fluid enters a vehicle wheel cylinder through the ABS/ESC to complete manual emergency braking. After the braking purpose is completed, the brake pedal is released, and the wheel cylinder brake fluid is returned to the master cylinder 15 and then to the reservoir tank 14 through the normally open solenoid valves 19 and 21.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention can be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should be covered by the scope of the claims of the present invention.
Claims (8)
1. The utility model provides an automobile drive-by-wire electron hydraulic braking system which characterized in that: the automobile wire control electronic hydraulic braking system comprises a hydraulic pump assembly, a hydraulic control unit, an electronic control unit and an ABS/ESC unit; the hydraulic pump assembly includes a high pressure accumulator; the hydraulic control unit comprises a sensor group, a normally closed electromagnetic valve group controlled to be opened and closed by the electronic control unit, a liquid storage tank, a main cylinder, a pedal simulator capable of obtaining pedal sensing feedback, and a normally open electromagnetic valve group controlled to be opened and closed by the electronic control unit; the sensor group is in signal connection with the electronic control unit and comprises a high-pressure energy accumulator pressure sensor for measuring the pressure in the high-pressure energy accumulator and a displacement sensor for measuring the displacement of a piston rod in the master cylinder; the normally closed electromagnetic valve group comprises a first path of pressurization normally closed electromagnetic valve arranged between the high-pressure energy accumulator and the ABS/ESC unit, a second path of pressurization normally closed electromagnetic valve arranged between the high-pressure energy accumulator and the ABS/ESC unit, a first path of pressure reduction normally closed electromagnetic valve arranged between the liquid storage tank and the ABS/ESC unit, a second path of pressure reduction normally closed electromagnetic valve arranged between the liquid storage tank and the ABS/ESC unit, and a second-stage normally closed electromagnetic valve arranged between the master cylinder and the pedal simulator; the normally open electromagnetic valve group comprises a first normally open electromagnetic valve arranged between the master cylinder and the ABS/ESC unit and a second normally open electromagnetic valve arranged between the master cylinder and the ABS/ESC unit.
2. The automotive by-wire electronic hydraulic brake system according to claim 1, characterized in that: the first path of pressure-increasing normally closed electromagnetic valve and the second path of pressure-increasing normally closed electromagnetic valve are both two pressure-increasing normally closed electromagnetic valves which are connected in parallel, and the first path of pressure-reducing normally closed electromagnetic valve and the second path of pressure-reducing normally closed electromagnetic valve are both two pressure-reducing normally closed electromagnetic valves which are connected in parallel.
3. The automotive by-wire electronic hydraulic brake system according to claim 1, characterized in that: the first path of pressure-increasing normally closed electromagnetic valve, the second path of pressure-increasing normally closed electromagnetic valve, the first path of pressure-reducing normally closed electromagnetic valve and the second path of pressure-reducing normally closed electromagnetic valve are all linear electromagnetic valves.
4. The automotive by-wire electronic hydraulic brake system according to claim 1, characterized in that: the hydraulic pump assembly further comprises a plunger pump and a motor which is in signal connection with the electronic control unit and can supplement brake fluid for the high-pressure energy accumulator to a set threshold value or not supplement the brake fluid for the high-pressure energy accumulator.
5. The automotive by-wire electronic hydraulic brake system according to claim 4, characterized in that: the high pressure accumulator pressure sensor is disposed between the high pressure accumulator and the plunger pump.
6. The automotive by-wire electronic hydraulic brake system according to any one of claims 1 to 5, characterized in that: the high-pressure accumulator brakes the vehicle through brake fluid, and the ABS/ESC unit is provided with an ABS/ESC oil outlet, an MC1 oil outlet and an MC2 oil outlet; the hydraulic pump assembly is connected with the hydraulic control unit through an oil pipe, and the electronic control unit is installed on the hydraulic control unit through a bolt.
7. The automotive by-wire electronic hydraulic brake system according to claim 6, characterized in that: the sensor group further comprises an MC1 oil outlet pressure sensor arranged between the MC1 oil outlet and the high-pressure accumulator, and a pedal master cylinder pressure sensor for measuring the pressure in a pedal master cylinder in the master cylinder.
8. The automotive by-wire electronic hydraulic brake system according to claim 6, characterized in that: the first path of pressure-increasing normally closed solenoid valve is arranged between the high-pressure energy accumulator and the MC1 oil outlets, the second path of pressure-increasing normally closed solenoid valve is arranged between the high-pressure energy accumulator and the MC2 oil outlets, the first path of pressure-reducing normally closed solenoid valve is arranged between the liquid storage tank and the MC1 oil outlets, the second path of pressure-reducing normally closed solenoid valve is arranged between the liquid storage tank and the MC2 oil outlets, the first normally open solenoid valve is arranged between the master cylinder and the MC1 oil outlets, and the second normally open solenoid valve is arranged between the master cylinder and the MC2 oil outlets.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121081386.5U CN215204841U (en) | 2021-05-19 | 2021-05-19 | Automobile line control electronic hydraulic brake system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121081386.5U CN215204841U (en) | 2021-05-19 | 2021-05-19 | Automobile line control electronic hydraulic brake system |
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| Publication Number | Publication Date |
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| CN215204841U true CN215204841U (en) | 2021-12-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121081386.5U Active CN215204841U (en) | 2021-05-19 | 2021-05-19 | Automobile line control electronic hydraulic brake system |
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| CN (1) | CN215204841U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114604215A (en) * | 2022-02-28 | 2022-06-10 | 浙江吉尚汽车部件有限公司 | Electronic brake system |
-
2021
- 2021-05-19 CN CN202121081386.5U patent/CN215204841U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114604215A (en) * | 2022-02-28 | 2022-06-10 | 浙江吉尚汽车部件有限公司 | Electronic brake system |
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