CN106427967B - Linear control braking system for full-mechanical decoupling automobile - Google Patents
Linear control braking system for full-mechanical decoupling automobile Download PDFInfo
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- CN106427967B CN106427967B CN201611055472.2A CN201611055472A CN106427967B CN 106427967 B CN106427967 B CN 106427967B CN 201611055472 A CN201611055472 A CN 201611055472A CN 106427967 B CN106427967 B CN 106427967B
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- push rod
- brake
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- master cylinder
- relay
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- 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
- B60T13/746—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 and mechanical transmission of the braking action
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- 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
- B60T13/10—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 fluid assistance, drive, or release
- B60T13/66—Electrical control in fluid-pressure brake systems
- B60T13/68—Electrical control in fluid-pressure brake systems by electrically-controlled valves
- B60T13/686—Electrical control in fluid-pressure brake systems by electrically-controlled valves in hydraulic systems or parts thereof
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- 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
- B60T7/00—Brake-action initiating means
- B60T7/02—Brake-action initiating means for personal initiation
- B60T7/04—Brake-action initiating means for personal initiation foot actuated
- B60T7/042—Brake-action initiating means for personal initiation foot actuated by electrical means, e.g. using travel or force sensors
Abstract
The invention relates to a full-mechanical decoupling automobile linear control system which comprises a brake master cylinder, a hydraulic control unit, a motor power assisting mechanism, an electromagnetic rotary relay and a mechanical decoupling mechanism, wherein the brake master cylinder is connected with the hydraulic control unit; the brake master cylinder is connected with the hydraulic control unit through a brake pipeline; the motor power assisting mechanism comprises a power assisting motor, a speed reducing and torque increasing device, a gear and a rack power assisting cylinder; the electromagnetic rotary relay comprises a relay shell, an electromagnetic rotary piece and a reset spring; the mechanical decoupling mechanism comprises a push rod barrel, a brake push rod, a decoupling push rod, a thrust bearing, a pedal simulator spring and a spring baffle; when the electromagnetic rotary relay is electrified to enable the electromagnetic rotary piece to drive the decoupling push rod to generate a rotation angle, the front end of the decoupling push rod can freely pass through the relay shell, and the spring baffle can not pass through the front end of the push rod barrel; when the electromagnetic rotary relay is powered off and the electromagnetic rotary piece drives the decoupling push rod to return, the front end of the decoupling push rod cannot pass through the relay shell, and the spring baffle can freely pass through the front end of the push rod barrel.
Description
Technical Field
The invention relates to a full-mechanical decoupling automobile brake-by-wire system, and belongs to the technical field of automobile braking.
Background
With the continuous increase of the global automobile conservation, the energy crisis and the environmental pollution are increasingly serious. New energy automobiles such as hybrid electric vehicles and pure electric vehicles gain wide attention in all countries of the world due to the advantages of high efficiency, energy conservation, low emission and the like, and become an effective means for solving the environmental pollution and the resource shortage. A lot of funds are invested in developing electric vehicles in various countries in the world, and meanwhile, new requirements are also put forward for the braking systems of hybrid electric vehicles and electric vehicles. In order to realize good cooperation with the feedback braking systems of the hybrid electric vehicle and the electric vehicle, the feedback braking system recovers as much braking energy as possible on the basis of braking safety, firstly, the dependence on the vacuum degree of an engine is cancelled, and secondly, the cooperation control with the feedback braking system cannot influence the feeling of a brake pedal. In the existing vacuum-assisted hydraulic brake system, a vacuum booster depends on the vacuum degree of an engine, and when the vacuum booster is controlled in coordination with feedback braking, the hydraulic control of the vacuum booster can influence the capacity and the hydraulic pressure of a master cylinder, so that the brake pedal feel is influenced. To overcome the above-mentioned shortcomings of the existing brake systems, engineers have developed several new brake systems from the 90 s of the last century, some of which have been used in hybrid and electric vehicles in the beginning of this century. The brake-by-wire system becomes an integral part of the brake system of the new energy automobile.
In a patent of the invention with publication number of CN104071142A applied by Qinghua university, a linear control braking system is disclosed, wherein a motor is used for replacing a vacuum booster of a traditional vacuum booster hydraulic braking system, and a piston in a brake master cylinder is pushed to generate braking hydraulic pressure through the cooperative work of the motor, a planetary gear reduction mechanism and a high-pressure accumulator, so that the dependence on the vacuum degree of an engine is eliminated; the pedal simulator is used to eliminate the influence on the brake pedal feel during the coordinated control with the feedback brake. However, a driving motor with higher power is added to the system to store energy for the high-voltage energy accumulator, so that the energy consumption of the system is increased; the high-pressure accumulator is always in a high-pressure state, so that certain potential safety hazards exist; in addition, the pedal simulator of the system is a simple spring and hydraulic simulator, the pedal feel is not easy to adjust, and the active pedal feel cannot be provided for a driver.
In a patent of the same university application, publication number CN104802777a, a hydraulic brake system for active simulation of pedal feel is disclosed, which uses a motor and ball screw mechanism to push a master cylinder piston to generate hydraulic pressure; the two electromagnetic valves are respectively positioned between the brake pipeline, the oilcan pipeline and the pedal feel simulation chamber, and the active simulation of pedal feel is realized by continuously controlling the opening and closing of the two electromagnetic valves during braking. However, when the electromagnetic valve is opened and closed between the brake pipeline and the pedal feel simulation chamber, the hydraulic pressure of the brake pipeline is affected, and the control precision is difficult to ensure; in addition, in case that the electromagnetic valve between the brake pipe and the pedal feel simulator is damaged, the high-pressure brake fluid in the brake master cylinder can directly enter the pedal feel simulator chamber, so that a driver cannot apply braking, and the system safety needs to be improved.
In one patent of the same university application, publication number CN104760586a, a dual motor brake-by-wire system is disclosed that uses a motor and ball screw mechanism to push the master cylinder piston, creating hydraulic pressure; another motor and ball screw mechanism is used to provide an active pedal feel for the brake pedal. Because the system uses two sets of motor-ball screw mechanisms and two brake master cylinders, the structure is complex, and the energy consumption and the manufacturing cost of the system are increased; the mechanical connection between the motor and the pedal increases the control difficulty of the system, and the motor performance requirement is higher.
Disclosure of Invention
In view of the above problems, an object of the present invention is to provide a power-assisted brake system for an automobile, which is capable of canceling dependency on engine vacuum and is stable and safe in performance.
In order to achieve the above purpose, the present invention adopts the following technical scheme: a wire control braking system for a full-mechanical decoupling automobile is characterized in that: the hydraulic braking system comprises a braking main cylinder, a hydraulic control unit, a motor power assisting mechanism, an electromagnetic rotary relay and a mechanical decoupling mechanism; the brake master cylinder is connected with the hydraulic control unit through a brake pipeline; the motor power assisting mechanism comprises a power assisting motor, a speed reducing and torque increasing device, a gear and a rack power assisting cylinder; the input end of the speed-reducing torque-increasing device is connected with the output end of the power-assisted motor, the output end of the speed-reducing torque-increasing device is connected with the gear, and the gear is meshed with the rack power-assisted cylinder; the electromagnetic rotary relay comprises a relay shell, an electromagnetic rotary piece and a return spring; the rear end of the reset spring is fixedly connected with the electromagnetic rotating piece, and the front end of the reset spring is fixedly connected with the relay shell; the relay shell is arranged in a limited range in the rack booster cylinder in a sliding way, and the front end of the relay shell is fixedly connected with a master cylinder piston of the brake master cylinder; the mechanical decoupling mechanism comprises a push rod barrel, a brake push rod, a decoupling push rod, a thrust bearing, a pedal simulator spring and a spring baffle; the push rod barrel is arranged in the rack booster barrel with a gap, and the front end of the brake push rod is connected with the decoupling push rod through the thrust bearing; the decoupling push rod is arranged in the push rod barrel in a sliding manner; the pedal simulator spring is sleeved on the decoupling push rod, the rear end of the pedal simulator spring is fixedly connected with the decoupling push rod, and the front end of the pedal simulator spring is fixedly connected with the spring baffle plate; the decoupling push rod is slidably and non-rotatably connected with the electromagnetic rotating piece; gaps exist between the front end of the decoupling push rod and the relay shell and between the spring baffle and the front end of the push rod barrel; when the electromagnetic rotary relay is electrified to enable the electromagnetic rotary piece to drive the decoupling push rod to generate a rotation angle, the front end of the decoupling push rod can freely pass through the relay shell, and the spring baffle can not pass through the front end of the push rod barrel; when the electromagnetic rotary relay is powered off and the electromagnetic rotary piece drives the decoupling push rod to return, the front end of the decoupling push rod cannot pass through the relay shell, and the spring baffle can freely pass through the front end of the push rod barrel.
The speed and torque reducing device and the gear are two and are arranged on two sides of the rack booster cylinder.
The mechanical decoupling mechanism further comprises a decoupling mechanism shell, wherein the front end of the decoupling mechanism shell is fixedly connected with the brake master cylinder, and the rear end of the decoupling mechanism shell is fixedly connected with the push rod barrel.
The brake master cylinder comprises a master cylinder shell, a master cylinder piston and a second master cylinder piston are arranged in the master cylinder shell, and the second cylinder piston is connected with the relay shell; and a master cylinder piston cavity is respectively formed between the master cylinder piston and the second master cylinder piston and between the second master cylinder piston and the closed end of the master cylinder shell, and piston return springs are respectively arranged in the two master cylinder piston cavities.
The hydraulic cylinder further comprises a main cylinder oil pot, wherein the main cylinder oil pot is connected with the two main cylinder piston cavities through an oil way.
The rear end of the brake push rod is rotationally connected with a brake pedal, and a pedal displacement sensor is arranged on the brake push rod.
The hydraulic power generation device further comprises a central controller, wherein the central controller is electrically connected with the power-assisted motor, the electromagnetic rotary relay, the hydraulic control unit and the pedal displacement sensor respectively.
Due to the adoption of the technical scheme, the invention has the following advantages: 1. because the invention adopts the motor power-assisted mechanism comprising the power-assisted motor, the speed-reducing torque-increasing device, the gear and the rack power-assisted cylinder, the rack power-assisted cylinder can push the electromagnetic rotary relay and the master cylinder piston in the brake master cylinder to translate, so as to generate brake fluid, thereby being capable of canceling the dependence on the vacuum degree of the engine. 2. The pedal simulator provided by the invention adopts the variable stiffness spring, can provide comfortable brake pedal feel for a driver, and is simple in structure, convenient and reliable. 3. When the system works normally, the electromagnetic rotary relay is matched with the full decoupling mechanical device, so that the full mechanical decoupling of the brake pedal force of a driver and the braking force of the system is realized, the structure is simple, the volume is small, a large number of hydraulic valves are omitted, and the cost and the energy consumption are reduced. 4. When the power supply fails or the power-assisted motor fails, the electromagnetic rotary relay is powered off and returns, and the full-mechanical decoupling device is matched, so that the braking force of a driver can be completely used for braking, and when the system fails, the braking pressure provided by the driver is about 3MP, so that the conventional braking is satisfied, the limit of the number of times of braking is avoided, and the safety and reliability of a backup braking system are greatly improved.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a schematic diagram of the structure of an electromagnetic rotary relay of the present invention;
FIG. 3 is a schematic cross-sectional view of a relay housing of the present invention with the front end of the decoupling pushrod being free/impermeable;
FIG. 4 is a schematic cross-sectional view of the front end of the putter barrel of the present invention.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings and examples.
As shown in fig. 1, the invention provides a full-mechanical decoupling automobile brake-by-wire system, which comprises a brake master cylinder 1, a hydraulic control unit 2, a motor booster mechanism 3, an electromagnetic rotary relay 4 and a mechanical decoupling mechanism 5.
The brake master cylinder 1 is connected with the hydraulic control unit 2 through a brake pipeline.
The motor assist mechanism 3 includes an assist motor 31, a deceleration torque increasing device 32, a gear 33, and a rack assist cylinder 34. The input end of the speed-reducing torque-increasing device 32 is connected with the output end of the booster motor 31. The output end of the speed-reducing torque-increasing device 32 is connected with a gear 33, and the gear 33 is meshed with a rack booster cylinder 34.
As shown in fig. 1 and 2, the electromagnetic rotary relay 4 includes a relay case 41, an electromagnetic rotary 42, and a return spring 43. The rear end of the return spring 43 is fixedly connected to the electromagnetic rotating member 42, and the front end is fixedly connected to the relay case 41. The relay case 41 is slidably provided within a limited range within the rack assist cylinder 34, and the front end of the relay case 41 is fixedly connected to the master cylinder piston 12 of the brake master cylinder 1.
The mechanical decoupling mechanism 5 includes a pushrod tube 51, a brake pushrod 52, a decoupling pushrod 53, a thrust bearing 54, a pedal simulator spring 55, and a spring damper 56. The push rod cylinder 51 is disposed inside the rack assist cylinder 34 with a gap, and the front end of the brake push rod 52 is connected to the decoupling push rod 53 through a thrust bearing 54. The decoupling push rod 53 is slidably disposed within the push rod barrel 51. The pedal simulator spring 55 is sleeved on the decoupling push rod 53, the rear end of the pedal simulator spring 55 is fixedly connected with the decoupling push rod 53, and the front end of the pedal simulator spring 55 is fixedly connected with the spring baffle 56. The decoupling push rod 53 is slidably and non-rotatably connected to the electromagnetic rotary 42. Gaps exist between the front end of the decoupling pushrod 53 and the relay case 41, and between the spring damper 56 and the front end of the pushrod barrel 51. When the electromagnetic rotary relay 4 is electrified to enable the electromagnetic rotary piece 42 to drive the decoupling push rod 53 to generate a rotation angle, the front end of the decoupling push rod 53 can freely pass through the relay shell 41, and the spring baffle 56 cannot pass through the front end of the push rod barrel 51; when the electromagnetic rotary relay 4 is powered off and the electromagnetic rotary member 42 drives the decoupling push rod 53 to return, the front end of the decoupling push rod 53 cannot pass through the relay case 41, and the spring damper 56 can freely pass through the front end of the push rod barrel 51.
In the above embodiment, the speed-reducing and torque-increasing device 32 and the gear 33 are two and arranged on both sides of the rack assist cylinder 34.
In the above embodiment, the mechanical decoupling mechanism 5 further includes the decoupling mechanism housing 57, and the front end of the decoupling mechanism housing 57 is fixedly connected to the master cylinder 1 and the rear end is fixedly connected to the push rod barrel 51.
In the above embodiment, the brake master cylinder 1 includes the master cylinder housing 11, the master cylinder piston 12 and the second master cylinder piston 13 are provided in the master cylinder housing 11, and the master cylinder piston 12 is connected to the relay case 41. A master cylinder piston chamber is formed between the master cylinder piston 12 and the second master cylinder piston 13 and between the second master cylinder piston 13 and the closed end of the master cylinder housing 11, respectively, and a piston return spring 14 is provided in each of the two master cylinder piston chambers.
In the above embodiment, the hydraulic control system further comprises a master cylinder oil can 6, and the master cylinder oil can 6 is connected with the two master cylinder piston cavities through oil ways.
In the above embodiment, the rear end of the brake push rod 52 is rotatably connected to the brake pedal 8, and the pedal displacement sensor 58 is mounted on the brake push rod 52.
In the above embodiment, the present invention further includes the central controller 7, and the central controller 7 is electrically connected to the booster motor 31, the electromagnetic rotary relay 4, the hydraulic control unit 2, and the pedal displacement sensor 58, respectively.
In the above embodiment, the ball end of the brake push rod 52 is in contact with the gap adjuster 59 for counteracting the small arc change of the brake pedal 8 when it is depressed.
The working principle and working process of the invention are as follows:
when the system works normally, the booster motor 31 is used for replacing a driver and a vacuum booster in a traditional vacuum booster hydraulic braking system, driving the speed and torque increasing device 32 to rotate, and the speed and torque increasing device 32 converts the rotation into translation of the rack booster cylinder 34 through engagement of the gear 33 and the rack booster cylinder 34, and the rack booster cylinder 34 drives the electromagnetic rotary relay 4 to push the master cylinder piston 12 to move, so that braking hydraulic pressure is generated. Specifically, when the system is operating normally, the brake pedal 8 is depressed, and the pedal displacement sensor 58 generates a corresponding signal for the degree to which the brake pedal 8 is depressed, and transmits the signal to the central controller 7. The central controller 7 determines the target output torque of the booster motor 31 by collecting displacement signals of the pedal displacement sensor 58, pressure sensor signals of the hydraulic control unit 2 and road surface condition identification signals, controls the actual output torque of the booster motor 31 to follow the target output torque of the booster motor 31, the booster motor 31 is connected with the speed and torque increasing device 32, the rotation of the booster motor 31 is converted into the translation of the rack booster cylinder 34 through the meshing of the gear 33 and the rack booster cylinder 34, the rack booster cylinder 34 pushes the electromagnetic rotary relay 4 to translate, the relay shell 41 pushes the master cylinder piston 12 to move, brake fluid in the piston cavities of the two master cylinders is pushed into the hydraulic control unit 2 through brake pipelines respectively, and then the brake fluid is pushed into each wheel cylinder brake through each brake pipeline connected with the hydraulic control unit 2, so that the vehicle is braked.
When the system works normally, the electromagnetic rotary relay 4 is electrified, the electromagnetic rotary piece 42 drives the decoupling push rod 53 to generate a certain rotation angle, the spring baffle 56 cannot penetrate through the front end of the push rod barrel 51 at the moment, the brake pedal force feedback of a driver is provided by the pedal simulator spring 55, and the system braking force is completely provided by the booster motor 31.
When the power supply of the system is disabled or the power-assisted motor 31 is disabled, the electromagnetic rotary relay 4 is powered off, under the action of the return spring 43, the electromagnetic rotary piece 42 drives the decoupling push rod 53 to return to the initial position, the driver presses the brake pedal 8, the brake push rod 52 pushes the decoupling push rod 53 to move, at the moment, the spring baffle 56 and the pedal simulator spring 55 pass through the front end of the push rod barrel 51 together with the decoupling push rod 53, and the pedal simulator spring 55 does not generate feedback force. Meanwhile, the decoupling push rod 53 cannot pass through the relay housing 41 at this time, so that the electromagnetic rotary relay 4 is pushed to translate, and the relay housing 41 pushes the brake master cylinder piston 12 to generate brake pressure.
The active power assist of the present invention can be realized by the power assist motor 31 for realizing the control functions of active collision avoidance, adaptive cruise, etc. When the hydraulic control unit 8 uses the vehicle stability control hydraulic control unit in the prior art, active pressurization may also be implemented by the hydraulic control unit 8, thereby implementing vehicle stability control.
When the hydraulic control unit 8 uses the automobile stability control hydraulic control unit in the prior art, if the motor of the system of the invention fails and the hydraulic control unit 8 can work normally, the functions of conventional braking, anti-lock braking, stability control and the like are realized at this time, and all the functions are realized by the hydraulic control unit 8 according to the prior art.
The invention is described in terms of the above embodiments only, the structure, arrangement and connection of the components can be varied, and on the basis of the technical solution of the invention, modifications and equivalent changes to the individual components according to the principles of the invention should not be excluded from the scope of the invention.
Claims (7)
1. A wire control braking system for a full-mechanical decoupling automobile is characterized in that: the hydraulic braking system comprises a braking main cylinder, a hydraulic control unit, a motor power assisting mechanism, an electromagnetic rotary relay and a mechanical decoupling mechanism;
the brake master cylinder is connected with the hydraulic control unit through a brake pipeline;
the motor power assisting mechanism comprises a power assisting motor, a speed reducing and torque increasing device, a gear and a rack power assisting cylinder; the input end of the speed-reducing torque-increasing device is connected with the output end of the power-assisted motor, the output end of the speed-reducing torque-increasing device is connected with the gear, and the gear is meshed with the rack power-assisted cylinder;
the electromagnetic rotary relay comprises a relay shell, an electromagnetic rotary piece and a return spring; the rear end of the reset spring is fixedly connected with the electromagnetic rotating piece, and the front end of the reset spring is fixedly connected with the relay shell; the relay shell is arranged in a limited range in the rack booster cylinder in a sliding way, and the front end of the relay shell is fixedly connected with a master cylinder piston of the brake master cylinder;
the mechanical decoupling mechanism comprises a push rod barrel, a brake push rod, a decoupling push rod, a thrust bearing, a pedal simulator spring and a spring baffle; the push rod barrel is arranged in the rack booster barrel with a gap, and the front end of the brake push rod is connected with the decoupling push rod through the thrust bearing; the decoupling push rod is arranged in the push rod barrel in a sliding manner; the pedal simulator spring is sleeved on the decoupling push rod, the rear end of the pedal simulator spring is fixedly connected with the decoupling push rod, and the front end of the pedal simulator spring is fixedly connected with the spring baffle plate; the decoupling push rod is slidably and non-rotatably connected with the electromagnetic rotating piece; gaps exist between the front end of the decoupling push rod and the relay shell and between the spring baffle and the front end of the push rod barrel; when the electromagnetic rotary relay is electrified to enable the electromagnetic rotary piece to drive the decoupling push rod to generate a rotation angle, the spring baffle cannot pass through the front end of the push rod barrel; when the electromagnetic rotary relay is powered off and the electromagnetic rotary piece drives the decoupling push rod to return, the front end of the decoupling push rod cannot pass through the relay shell, and the spring baffle can freely pass through the front end of the push rod barrel;
and a gap adjusting piece is arranged between the brake push rod and the thrust bearing, and the ball end of the brake push rod is contacted with the gap adjusting piece and is used for counteracting small radian change of a brake pedal when the brake pedal is pressed down.
2. A fully mechanically decoupled automotive brake-by-wire system as set forth in claim 1, wherein: the speed and torque reducing device and the gear are two and are arranged on two sides of the rack booster cylinder.
3. A fully mechanically decoupled automotive brake-by-wire system as set forth in claim 1, wherein: the mechanical decoupling mechanism further comprises a decoupling mechanism shell, wherein the front end of the decoupling mechanism shell is fixedly connected with the brake master cylinder, and the rear end of the decoupling mechanism shell is fixedly connected with the push rod barrel.
4. A fully mechanically decoupled automotive brake-by-wire system as set forth in claim 1, wherein: the brake master cylinder comprises a master cylinder shell, a master cylinder piston and a second master cylinder piston are arranged in the master cylinder shell, and the master cylinder piston is connected with the relay shell; and a master cylinder piston cavity is respectively formed between the master cylinder piston and the second master cylinder piston and between the second master cylinder piston and the closed end of the master cylinder shell, and piston return springs are respectively arranged in the two master cylinder piston cavities.
5. A fully mechanically decoupled automotive brake-by-wire system as set forth in claim 4 wherein: the hydraulic cylinder further comprises a main cylinder oil pot, wherein the main cylinder oil pot is connected with the two main cylinder piston cavities through an oil way.
6. A fully mechanically decoupled automotive brake-by-wire system as set forth in claim 1, wherein: the rear end of the brake push rod is rotationally connected with a brake pedal, and a pedal displacement sensor is arranged on the brake push rod.
7. A fully mechanically decoupled automotive brake-by-wire system as set forth in claim 6 wherein: the hydraulic power generation device further comprises a central controller, wherein the central controller is electrically connected with the power-assisted motor, the electromagnetic rotary relay, the hydraulic control unit and the pedal displacement sensor respectively.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201611055472.2A CN106427967B (en) | 2016-11-25 | 2016-11-25 | Linear control braking system for full-mechanical decoupling automobile |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201611055472.2A CN106427967B (en) | 2016-11-25 | 2016-11-25 | Linear control braking system for full-mechanical decoupling automobile |
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| CN106427967A CN106427967A (en) | 2017-02-22 |
| CN106427967B true CN106427967B (en) | 2023-07-14 |
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| CN109204268B (en) * | 2017-06-30 | 2020-12-25 | 比亚迪股份有限公司 | Brake pedal simulator, automobile brake system and vehicle |
| CN107554510A (en) * | 2017-07-12 | 2018-01-09 | 格陆博科技有限公司 | A kind of electric motor protecting type electric control braking booster |
| CN107618496A (en) * | 2017-07-12 | 2018-01-23 | 格陆博科技有限公司 | A kind of electric control braking booster |
| CN110027535B (en) * | 2018-01-12 | 2021-09-03 | 比亚迪股份有限公司 | Pedal feel simulator for vehicle and vehicle with same |
| CN110562225B (en) * | 2018-06-05 | 2022-01-14 | 华为技术有限公司 | Hydraulic braking device, control device and method thereof, and new energy automobile braking system |
| CN109878475A (en) * | 2019-03-31 | 2019-06-14 | 浙江力邦合信智能制动系统股份有限公司 | A kind of brake booster |
| CN111231915B (en) * | 2020-02-21 | 2021-04-23 | 苏州挚途科技有限公司 | Brake system |
| CN111661021A (en) * | 2020-05-22 | 2020-09-15 | 上海大陆汽车制动系统销售有限公司 | Decoupling type braking system with pedal simulator |
| CN113997917B (en) * | 2021-11-24 | 2023-12-19 | 吉林东光奥威汽车制动系统有限公司 | Mechanical hydraulic component of electronic brake booster capable of being mechanically and hydraulically decoupled |
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| CN105667484A (en) * | 2016-01-11 | 2016-06-15 | 清华大学 | Wire control brake system driven by two fully decoupled motors |
| CN105774788A (en) * | 2016-03-04 | 2016-07-20 | 吉林大学 | Electric power-assisted braking system with composite functions |
| CN105922979A (en) * | 2016-04-26 | 2016-09-07 | 徐松云 | Novel full decoupling electronic hydraulic power-assisted brake system |
| CN206579621U (en) * | 2016-11-25 | 2017-10-24 | 清华大学 | Complete mechanically decoupled line for cars control brakes |
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