CN108382381B - Electric power-assisted braking device - Google Patents
Electric power-assisted braking device Download PDFInfo
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- CN108382381B CN108382381B CN201810290947.9A CN201810290947A CN108382381B CN 108382381 B CN108382381 B CN 108382381B CN 201810290947 A CN201810290947 A CN 201810290947A CN 108382381 B CN108382381 B CN 108382381B
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- push rod
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- brake
- master cylinder
- main cylinder
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- 238000006243 chemical reaction Methods 0.000 claims abstract description 45
- 238000006073 displacement reaction Methods 0.000 claims abstract description 29
- 230000007246 mechanism Effects 0.000 claims description 8
- 230000008878 coupling Effects 0.000 claims description 2
- 238000010168 coupling process Methods 0.000 claims description 2
- 238000005859 coupling reaction Methods 0.000 claims description 2
- 238000009434 installation Methods 0.000 claims 1
- 230000005540 biological transmission Effects 0.000 description 6
- 230000033001 locomotion Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000003044 adaptive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
- B60T13/74—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with electrical assistance or drive
- B60T13/745—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with electrical assistance or drive acting on a hydraulic system, e.g. a master cylinder
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- Engineering & Computer Science (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Braking Systems And Boosters (AREA)
- Braking Elements And Transmission Devices (AREA)
Abstract
The invention discloses an electric power-assisted braking device, which belongs to the technical field of automobile braking and comprises: the brake system comprises an electric power assisting assembly, a pedal push rod, a control cylinder body, a rubber reaction disc, a brake master cylinder, a master cylinder push rod and a master cylinder piston; the pedal push rod is coaxially arranged in the control cylinder body; a rubber reaction disc is coaxially fixed at the end part of the control cylinder body; one end of the main cylinder push rod is opposite to the rubber reaction plate, and the other end of the main cylinder push rod is arranged in the braking main cylinder through a main cylinder piston; the electric power assisting component is used for detecting displacement of the pedal push rod, pushing the rubber reaction disc to move towards the brake master cylinder through the control cylinder body, and the rubber reaction disc couples braking force from the pedal push rod and braking force from the control cylinder body to push the master cylinder push rod to move towards the brake master cylinder; the invention can sense the force of stepping on the brake pedal by a driver, and further control the motor to push the master cylinder piston through an integrated mechanical structure so as to realize electric power-assisted braking.
Description
Technical Field
The invention belongs to the technical field of automobile braking, and particularly relates to an electric power-assisted braking device.
Background
Traditional automobile servo brake system relies on vacuum booster to carry out brake assistance, and the vacuum source of vacuum assistance is engine intake manifold. But the vacuum booster equipment system is complex and the production cost is high.
The traditional vacuum booster braking system can only realize a braking mode of one driving style on the same vehicle type because the braking boosting ratio can not be adjusted, namely, the braking force and the displacement of a brake pedal are the only corresponding relation, and the driving mode is single.
The braking system is required to have an active braking function in the unmanned system, the pre-crash system and the adaptive cruise system, while the conventional braking system cannot realize the active braking function.
Disclosure of Invention
In view of the above, the present invention aims to provide an electric power-assisted braking device, which can sense the force of a driver stepping on a brake pedal, further control a motor to push a master cylinder piston through an integrated mechanical structure to realize electric power-assisted braking, and feed back the electric power-assisted braking to the driver with good pedal feel.
The invention is realized by the following technical scheme:
an electric assist brake device comprising: the brake system comprises an electric power assisting assembly, a pedal push rod, a control cylinder body, a rubber reaction disc, a brake master cylinder, a return spring, a master cylinder push rod and a master cylinder piston;
one end of the pedal push rod is connected with a pedal mechanism of the automobile, and the other end of the pedal push rod is coaxially arranged in the control cylinder body and can axially move in the control cylinder body; a rubber reaction disc is coaxially fixed at the end part of the control cylinder body; when the brake is not applied, the pedal push rod is not contacted with the rubber reaction disc, and when the brake is applied, the pedal push rod moves to be contacted with the rubber reaction disc to push the rubber reaction disc to move;
one end of the main cylinder push rod is opposite to the rubber reaction plate, and the other end of the main cylinder push rod is arranged in the braking main cylinder through a main cylinder piston; one end of the return spring is fixedly connected with a mounting piece fixed at the end part of the control cylinder body, the other end of the return spring is abutted against the end surface of the braking main cylinder, and the return spring is in a compressed state, so that the main cylinder push rod is abutted against the rubber reaction plate;
the electric power assisting component is used for detecting displacement of the pedal push rod, pushing the rubber reaction disc to move towards the brake master cylinder through the control cylinder body, coupling braking force from the pedal push rod with braking force from the control cylinder body through the rubber reaction disc, pushing the master cylinder push rod to move towards the brake master cylinder, and compressing and building pressure on a cavity in the brake master cylinder through the master cylinder piston.
Further, the electric power assisting assembly includes: the device comprises a motor, a worm wheel, a worm, a screw rod nut, a pedal displacement sensor and a control module;
the pedal displacement sensor is used for detecting the displacement of the pedal push rod and sending a displacement signal of the pedal push rod to the control module, and the control module controls the motor to work after receiving the displacement signal;
the output shaft of the motor is coaxially fixed with a worm; the worm wheel is coaxially fixed outside the screw nut, and is meshed with the worm; the lead screw suit is outside the footboard push rod to with lead screw nut cooperation, and the terminal surface of lead screw is inconsistent with the tip that control cylinder body is not fixed with rubber reaction dish.
Further, the pedal push rod consists of a pedal push rod A and a pedal push rod B which are hinged through a ball head.
Further, an annular limiting boss is arranged in the middle of the pedal push rod, and when the pedal push rod moves towards the brake master cylinder to enable the limiting boss to contact with the end face of the control cylinder body, the control cylinder body is driven to move together.
Further, a brake spring is arranged outside the pedal push rod, two ends of the brake spring are respectively abutted against the pedal push rod gasket sleeved in the middle of the pedal push rod and an annular boss arranged in the cavity of the control cylinder body, the brake spring is in a compressed state, and the generated pretightening force is a set value.
Further, the main cylinder push rod consists of a main cylinder push rod A, a main cylinder push rod B and a main cylinder push rod C which are coaxially connected in sequence; one end of the main cylinder push rod B is hinged with the ball head of the main cylinder push rod A, and the other end is in threaded connection with the main cylinder push rod C.
Furthermore, the mounting piece of the outer circumferential surface of the main cylinder push rod is a return spring connecting shell, and the return spring connecting shell is fixed on the outer circumferential surface of the main cylinder push rod and sleeved on the outer circumferential surface of the end part of the control cylinder body.
Further, the screw nut is arranged on a supporting frame of the motor through a bearing.
The beneficial effects are that: (1) According to the invention, after the brake intention of a driver is acquired through the pedal displacement sensor, the motor is controlled to work through the control module, so that the control cylinder body and the pedal push rod push the master cylinder piston together, and pressure is built for the brake master cylinder, thereby realizing electric power assistance in the braking process.
(2) The control module can communicate with an unmanned system, a pre-collision system and a self-adaptive cruise system, can directly drive a motor after receiving a braking instruction under the condition of non-driver operation, controls a control cylinder body to push a rubber reaction disc, and the rubber reaction disc establishes pressure for a brake master cylinder through a master cylinder push rod and a master cylinder piston to quickly generate braking force for maintaining safe operation of a vehicle so as to realize active braking.
(3) The electric booster fails, namely, when the motor cannot work, the pedal push rod sequentially pushes the main cylinder push rod and the main cylinder piston to move through the rubber reaction disc, so that the brake main cylinder is pressurized, emergency braking is realized, in the emergency braking process, the screw rod has no movement interference on the control cylinder body, and the failure backup system is simple and reliable.
(4) The invention can control the linear motion length of the screw rod by controlling the rotation angle of the motor, and further control the displacement of the contact surface of the cylinder body and the rubber reaction plate, so that multiple driving modes can be realized on the same vehicle type.
(5) The screw rod and the control cylinder body are coaxial, so that the whole device is more compact in structure, the ball screw pair is adopted as the screw rod pair, and the screw rod ball body rolls between the screw rod nut and the screw rod, so that the screw rod is high in movement efficiency, small in friction loss, high in transmission efficiency, high in transmission precision and high in axial rigidity.
(6) The invention adopts a worm and gear mechanism with large transmission ratio and compact structure, the mechanism has stable transmission and no noise, and has the characteristics of a spiral mechanism because of line contact during meshing, so the invention has the characteristics of larger bearing capacity, large transmission ratio, low transmission power and intermittent operation.
(7) The invention is provided with the brake spring, when the force for pushing the pedal push rod A is larger than the pretightening force of the brake spring, the pedal push rod A, the pedal push rod B and the pedal displacement sensor can be pushed to move, and the unexpected brake caused by pedal vibration or misoperation of a driver can be avoided.
(8) According to the invention, the main cylinder push rod A and the main cylinder push rod B are hinged through the ball head, the main cylinder push rod B and the main cylinder push rod C are connected through the screw thread, and the pedal push rod A and the pedal push rod B are hinged through the ball head, so that the total length of the main cylinder push rod and the pedal push rod is adjustable, and the main cylinder push rod and the pedal push rod can be suitable for different braking main cylinders and braking systems.
Drawings
FIG. 1 is a schematic diagram of the structural composition of the present invention.
Fig. 2 is a schematic diagram showing the connection of the master cylinder push rod a, the master cylinder push rod B, the master cylinder push rod C and the master cylinder piston according to the present invention.
The device comprises a 1-pedal push rod A, a 2-screw rod, a 3-screw nut, a 4-screw rod ball, a 5-pedal push rod B, a 6-pedal push rod gasket, a 7-brake spring, an 8-control cylinder body, a 9-pedal displacement sensor, a 10-rubber reaction disc, a 11-return spring connecting shell, a 12-master cylinder push rod A, a 13-master cylinder push rod B, a 14-master cylinder push rod C, a 15-return spring, a 16-master cylinder piston, a 17-brake master cylinder, a 18-worm wheel, a 19-worm, a 20-motor, a 21-control module and a 22-bearing.
Detailed Description
The invention will now be described in detail by way of example with reference to the accompanying drawings.
This embodiment provides an electric power-assisted braking device, referring to fig. 1, including: pedal rod A1, lead screw 2, lead screw nut 3, lead screw ball 4, pedal rod B5, pedal rod washer 6, brake spring 7, control cylinder 8, pedal displacement sensor 9, rubber reaction disk 10, return spring connection housing 11, master cylinder rod a12, master cylinder rod B13, master cylinder rod C14, return spring 15, master cylinder piston 16, brake master cylinder 17, worm wheel 18, worm 19, motor 20, control module 21, and bearing 22;
the motor 20 is arranged on an external supporting frame, and the output shaft of the motor 20 is coaxially fixed with a worm 19; one end of the screw nut 3 is arranged on a supporting frame of the motor 20 through a bearing 22, the other end is coaxially fixed with a worm wheel 18, and the worm wheel 18 is meshed with a worm 19; the screw rod 2 is matched with the screw rod nut 3 through a roller screw rod ball 4 to form a ball screw pair;
the left end of the control cylinder body 8 is contacted with the end part of the screw rod 2, and the control cylinder body 8 and the screw rod 2 are of hollow structures; a pedal push rod A1 is coaxially arranged in the cavity of the screw rod 2, and a pedal push rod B5 is coaxially arranged in the cavity of the control cylinder body 8; the right end of the pedal push rod A1 is hinged with the left end of the pedal push rod B5 through a ball head; the left end of the pedal push rod A1 is connected with a pedal mechanism of an automobile through threads, an annular limiting boss is arranged outside the left end of the pedal push rod B5, and when the pedal push rod B5 moves rightwards to enable the limiting boss to be abutted against the left end face of the control cylinder 8, the control cylinder 8 can be driven to move rightwards together, so that the control cylinder is not contacted with the screw rod 2 any more; a pedal displacement sensor 9 is arranged in a hole machined at the right end of the pedal push rod B5, and the pedal displacement sensor 9 is in interference fit with the hole at the right end of the pedal push rod B2; wherein, the right end face of the pedal push rod B5 can extend out of the cavity of the control cylinder body 8; the brake spring 7 is sleeved outside the pedal push rod B5, two ends of the brake spring 7 are respectively abutted against annular bosses arranged in a pedal push rod gasket 6 sleeved in the middle of the pedal push rod B5 and a cavity of the control cylinder 8, the brake spring 7 is in a compressed state, and the generated pretightening force is a set value;
the rubber reaction plate 10 is arranged on the right end face of the control cylinder 8, and seals the cavity of the control cylinder 8, when no braking is performed, the gap between the right end of the pedal push rod B5 and the end face of the rubber reaction plate 10 is a set value, and the set value is 1-3 mm;
referring to fig. 2, the right end of the master cylinder piston 16 is coaxially located within the brake master cylinder 17, and the master cylinder piston 16 is movable within the brake master cylinder 17 in the axial direction thereof; the main cylinder piston 16 is of a hollow structure, a main cylinder push rod C14 is coaxially fixed in the main cylinder piston, one end of the main cylinder push rod B13 is in threaded connection with the main cylinder push rod C14, and the other end of the main cylinder push rod B extends out of the left end face of the main cylinder piston 16;
the return spring connecting shell 11 is sleeved at the right end of the control cylinder body 8, the main cylinder push rod A12 is fixed in the return spring connecting shell 11, and the main cylinder push rod A12 and the main cylinder push rod B13 are hinged through a ball head;
the return spring 15 is arranged between the return spring connecting shell 11 and the brake master cylinder 17, one end of the return spring 15 is fixed on the return spring connecting shell 11, the other end of the return spring 15 is abutted against the end face of the brake master cylinder 17, the return spring 15 is in a compressed state, the master cylinder push rod A12 is abutted against the rubber reaction plate 10, and the return function of the pedal push rod A1 and the pedal push rod B5 is achieved;
the control module 21 is electrically connected to the motor 20 and the pedal displacement sensor 9, respectively.
Working principle: in the braking process, when a driver presses a brake pedal of a pedal mechanism by foot, so that the force for pushing a pedal push rod A1 is larger than the pretightening force of a brake spring 7, the pedal push rod A1, the pedal push rod B5 and a pedal displacement sensor 9 are pushed to move rightwards, and after the pedal push rod B5 is contacted with a rubber reaction disc 10, a master cylinder push rod A12, a master cylinder push rod B13, a master cylinder push rod C14 and a master cylinder piston 16 are sequentially pushed rightwards through the rubber reaction disc 10;
meanwhile, after the pedal displacement sensor 9 detects a displacement signal of the pedal push rod B5, the displacement signal is transmitted to the control module 21, the control module 21 drives the motor 20 to work, an output shaft of the motor 20 drives the worm 19 to coaxially rotate, the worm 19 drives the worm wheel 18 to rotate, the worm wheel 18 drives the screw nut 3 fixedly connected with the worm wheel to rotate, and as the screw 2 is matched with the screw nut 3, the screw 2 linearly moves right along the axial direction of the screw 2 to push the control cylinder 8 to linearly move right, and then the master cylinder push rod A12, the master cylinder push rod B13, the master cylinder push rod C14 and the master cylinder piston 16 are sequentially pushed to move right through the rubber reaction disc 10;
therefore, the rubber reaction disk 10 couples the braking force from the pedal rod B5 and the braking force from the control cylinder 8 to form a resultant force, and builds up pressure on the brake master cylinder 17 through the master cylinder rod a12, the master cylinder rod B13, the master cylinder rod C14, and the master cylinder piston 16, thereby realizing electric power assistance during braking.
When the electric power fails, i.e. the motor 20 cannot work, the pedal push rod B5 can still push the main cylinder push rod A12, the main cylinder push rod B13, the main cylinder push rod C14 and the main cylinder piston 16 to move rightwards through the rubber reaction disc 10 in sequence, so that the brake main cylinder 17 builds pressure; specifically, the pedal push rod B5 is in contact with the rubber reaction disc 10 to initially build pressure on the brake master cylinder 17, and as the pedal force of the brake pedal of the pedal mechanism is increased by the driver's foot, the pedal push rod B5 abuts against the end face of the control cylinder 8 through the limit boss at the end of the pedal push rod B5 to drive the control cylinder 8 to push the rubber reaction disc 10 together, so that the pre-tightening force of the return spring 15 is overcome, the brake master cylinder 17 is further built pressure, and emergency braking of the automobile is realized.
The pre-tightening force of the braking spring 7 is the initial force of the invention, namely the minimum input force capable of pushing the pedal push rod B5 to move, namely the threshold of the motor 20 entering the working condition, so that the unexpected braking caused by pedal vibration or misoperation of a driver can be avoided; before the pedal push rod B5 moves rightwards but is not contacted with the rubber reaction plate 10, the brake spring 7 compresses and feeds back the pedal feel curve with a small slope, and after the pedal push rod B5 is contacted with the rubber reaction plate 10, the pedal push rod B5 continues to move rightwards, and the brake spring 7 compresses and feeds back the pedal feel curve with a large slope; thus, the brake spring 7 can provide pedal force feedback to the driver.
The circular surface of the pedal push rod B5, which is in contact with the rubber reaction plate 10, is a surface A, and the circular surface of the control cylinder body 8, which is in contact with the rubber reaction plate 10, is a surface B; during braking, the braking assistance ratio can be adjusted by adjusting the displacement difference det of the surface A and the surface B. Therefore, the linear motion length of the screw rod 2 can be controlled by controlling the rotation angle of the motor 20 through the control module 21, so that the displacement of the surface B, which is in contact with the rubber reaction plate 10, of the control cylinder body 8 is controlled, and the displacement difference det between the surface A and the surface B is variable, namely, multiple driving modes are realized on the same vehicle type.
In summary, the above embodiments are only preferred embodiments of the present invention, and are not intended to limit the scope of the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. An electric power-assisted brake device, comprising: the brake device comprises an electric power assisting assembly, a pedal push rod, a control cylinder body (8), a rubber reaction disc (10), a brake master cylinder (17), a return spring (15), a master cylinder push rod and a master cylinder piston (16);
one end of the pedal push rod is connected with a pedal mechanism of the automobile, and the other end of the pedal push rod is coaxially arranged in the control cylinder body (8) and can axially move in the control cylinder body (8); a rubber reaction disc (10) is coaxially fixed at the end part of the control cylinder body (8); when the brake is not applied, the pedal push rod is not in contact with the rubber reaction disc (10), and when the brake is applied, the pedal push rod moves to be in contact with the rubber reaction disc (10) to push the rubber reaction disc (10) to move;
one end of the main cylinder push rod is opposite to the rubber reaction plate (10), and the other end of the main cylinder push rod is arranged in the braking main cylinder (17) through a main cylinder piston (16); one end of a return spring (15) is fixedly connected with a mounting piece fixed at the end part of the control cylinder body (8), the other end of the return spring is abutted against the end surface of the braking main cylinder (17), and the return spring (15) is in a compressed state, so that a main cylinder push rod is abutted against the rubber reaction plate (10);
the electric power assisting assembly is used for detecting displacement of the pedal push rod, pushing the rubber reaction disc (10) to move towards the brake master cylinder (17) through the control cylinder body (8), coupling braking force from the pedal push rod and braking force from the control cylinder body (8) to push the master cylinder push rod to move towards the brake master cylinder (17), and compressing and pressurizing a cavity in the brake master cylinder (17) through the master cylinder piston (16);
the main cylinder push rod consists of a main cylinder push rod A (12), a main cylinder push rod B (13) and a main cylinder push rod C (14) which are coaxially connected in sequence; one end of a main cylinder push rod B (13) is hinged with a main cylinder push rod A (12) in a ball joint manner, and the other end of the main cylinder push rod B is in threaded connection with a main cylinder push rod C (14);
the installation piece of the outer circumferential surface of the main cylinder push rod is a return spring connection shell (11), and the return spring connection shell (11) is fixed on the outer circumferential surface of the main cylinder push rod and sleeved on the outer circumferential surface of the end part of the control cylinder body (8).
2. An electric power assisted brake apparatus as claimed in claim 1 wherein said electric power assisted assembly comprises: the device comprises a motor (20), a worm wheel (18), a worm (19), a screw (2), a screw nut (3), a pedal displacement sensor (9) and a control module (21);
the pedal displacement sensor (9) is used for detecting the displacement of the pedal push rod and sending a displacement signal of the pedal push rod to the control module (21), and the control module (21) controls the motor (20) to work after receiving the displacement signal;
an output shaft of the motor (20) is coaxially fixed with a worm (19); the worm wheel (18) is coaxially fixed outside the screw nut (3), and the worm wheel (18) is meshed with the worm (19); the screw rod (2) is sleeved outside the pedal push rod and is matched with the screw rod nut (3), and the end face of the screw rod (2) is abutted against the end part of the control cylinder body (8) where the rubber reaction disc (10) is not fixed.
3. An electric brake device according to claim 1, characterized in that the pedal push rod consists of a pedal push rod a (1) and a pedal push rod B (5) hinged by means of a ball head.
4. An electric power-assisted brake device as claimed in claim 1, characterized in that the middle part of the pedal push rod is provided with an annular limit boss, and when the pedal push rod moves towards the brake master cylinder (17) to enable the limit boss to contact with the end surface of the control cylinder (8), the control cylinder (8) is driven to move together.
5. The electric power-assisted braking device according to claim 1, wherein a braking spring (7) is installed outside the pedal push rod, two ends of the braking spring (7) respectively abut against annular bosses arranged in cavities of the pedal push rod gasket (6) and the control cylinder body (8) sleeved in the middle of the pedal push rod, the braking spring (7) is in a compressed state, and the generated pretightening force is a set value.
6. An electric brake device according to claim 2, characterized in that the spindle nut (3) is mounted on the support frame of the motor (20) by means of bearings (22).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810290947.9A CN108382381B (en) | 2018-03-30 | 2018-03-30 | Electric power-assisted braking device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810290947.9A CN108382381B (en) | 2018-03-30 | 2018-03-30 | Electric power-assisted braking device |
Publications (2)
| Publication Number | Publication Date |
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| CN108382381A CN108382381A (en) | 2018-08-10 |
| CN108382381B true CN108382381B (en) | 2024-03-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810290947.9A Active CN108382381B (en) | 2018-03-30 | 2018-03-30 | Electric power-assisted braking device |
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| CN110065485A (en) * | 2019-05-10 | 2019-07-30 | 安徽理工大学 | A kind of fax braking system for low-speed electronic automobile |
| CN110281897B (en) * | 2019-06-13 | 2024-06-25 | 坤泰车辆***（常州）有限公司 | Electric power-assisted brake of automobile, application method thereof and automobile braking system |
| CN110588615A (en) * | 2019-08-28 | 2019-12-20 | 安徽理工大学 | Coordination control strategy based on electromechanical brake integrated system |
| CN110562228B (en) * | 2019-09-10 | 2022-04-19 | 武汉理工大学 | Electric hydraulic power-assisted brake system of automobile |
| CN111661021A (en) * | 2020-05-22 | 2020-09-15 | 上海大陆汽车制动***销售有限公司 | Decoupling type braking system with pedal simulator |
| CN111605530B (en) * | 2020-06-01 | 2021-07-27 | 长沙理工大学 | Working method of brake system |
| CN111960310B (en) * | 2020-08-26 | 2021-09-28 | 安徽理工大学 | Braking device of mine hoist |
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| US6352316B1 (en) * | 1999-04-23 | 2002-03-05 | Bosch Braking Systems Co., Ltd. | Brake system |
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