CN103950445A - Hydraulic double-motor driving electronic hydraulic braking system - Google Patents
Hydraulic double-motor driving electronic hydraulic braking system Download PDFInfo
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- CN103950445A CN103950445A CN201410148263.7A CN201410148263A CN103950445A CN 103950445 A CN103950445 A CN 103950445A CN 201410148263 A CN201410148263 A CN 201410148263A CN 103950445 A CN103950445 A CN 103950445A
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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
- B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
- B60T8/32—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration
- B60T8/34—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration having a fluid pressure regulator responsive to a speed condition
- B60T8/40—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration having a fluid pressure regulator responsive to a speed condition comprising an additional fluid circuit including fluid pressurising means for modifying the pressure of the braking fluid, e.g. including wheel driven pumps for detecting a speed condition, or pumps which are controlled by means independent of the braking system
- B60T8/4072—Systems in which a driver input signal is used as a control signal for the additional fluid circuit which is normally used for braking
- B60T8/4081—Systems with stroke simulating devices for driver input
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- Fluid Mechanics (AREA)
- Engineering & Computer Science (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Braking Elements And Transmission Devices (AREA)
- Braking Systems And Boosters (AREA)
Abstract
A hydraulic double-motor driving electronic hydraulic braking system comprises a braking pedal, a braking master cylinder, a secondary master cylinder, a liquid storage tank, a pedal displacement sensor, a hydraulic pressure sensor, an electronic control unit ECU, a first electronic control linear moving module and a second electronic control linear moving module for performing active control on hydraulic braking force and pedal force of the system, an electronic stability control module ESC for regulating the hydraulic braking force of each wheel cylinder, a tee joint for connecting hydraulic pipelines between the braking master cylinder and the inlet of the electronic stability control (ESC) module as well as between the secondary master cylinder and the inlet of the ESC module. According to the invention, the pedal force of a driver can be utilized for pressure establishing, the active control on the pedal force is realized while a pedal force simulator with a complex structure is omitted, braking pedal feel is ensured, the braking intention of the driver can be correctly reflected, the active control on hydraulic pressure is realized, the braking requirement of a vehicle is met, maximum braking energy recycling can be realized, the control is precise, and the response speed is high.
Description
Technical field
The invention belongs to automobile technical field, relate to automobile brake technology, especially motor-driven EHB.
Background technology
Due to becoming increasingly conspicuous of energy shortage and environmental problem, electronlmobil with its cleanliness without any pollution, energy efficiency is high and energy source is diversified, the advantage such as simple in structure, easy to maintenance becomes auto-industry future development main direction, but due to technical limitation such as motor, batteries, electronlmobil continual mileage is short, cost is high; Along with the raising of intelligent requirements, and the problem such as traffic accident, traffic congestion needs to solve, and continent, many Automobile Enterprises such as general carry out the research of automatic driving vehicle, and automatic Pilot technical development is rapid.Brake system is as a vital system in vehicle safety performance, how recovery braking energy as much as possible, increase electronlmobil continual mileage, how to improve the active safety of vehicle, when Vehicular automatic driving, do not rely on manpower brake to become the problem that needs solution.
EHB (EHB) is as a kind of comparatively novel brake system, the a kind of of line control brake system, it has substituted part mechanical element with electronic component, between brake pedal and brake wheel cylinder, be no longer directly connected, utilize sensor to gather driver's operation information and as controlling intention, by hydraulic actuator, complete brake operating completely.New-energy automobile is in braking procedure, when hydraulic braking force puts on wheel, make drive motor be operated in regenerative electric power braking state and also wheel applied to regenerative brake power, thus the energy producing while reclaiming braking when completing vehicle effective brake and be stored in energy storage device in for again utilizing.
EHB is mainly comprised of brake pedal, pedal displacement sensor (or pedal angle sensor), electronic control unit (ECU), hydraulic actuator.Pedal displacement sensor (pedal angle sensor), for detection of pedal-displacement (pedal corner), then changes into electric signal by displacement (corner) signal and passes to ECU, carries out the regulation and control of braking force.
Within 1994, Analog company develops the control system of a set of electric control hydraulic braking system by the method for Saber analogue simulation; Calendar year 2001, in the car exhibition of Frankfort, Bosch company puts on display the EHB of research and development, be provided on the 5th generation gub SL500 of Benz company, after this, Bosch and Daimler Chrysler company begin one's study for the EHB system of business, and are assemblied on Mercedes E level car in 2002; 2002, the Focus FCV brake system of Ford Motor Company adopted the EHB system of CPG Gmbh & Co.'s exploitation; 2003, Continental Teves also started its EHB plan, and trial assembly is on some concept cars of popular company.Compare with conventional hydraulic brake system, EHB has been cancelled bulky vacuum booster, and structure is more compact, and it is convenient to control, and brake oil reduces, and has improved brake efficiency.
General EHB is realized the ACTIVE CONTROL to hydraulic brake system hydraulic braking force by high pressure accumulator, motor and pump combined action, but technique is still immature, also there is hidden danger in reliability and safety, can not guarantee pedal sense simultaneously or need to adopt pedal simulator simulation pedal sense; It does not make full use of manpower in addition, and the treadle effort that chaufeur is stepped on is braked, and causes the waste of the energy to a certain extent.
With motor and physical construction, replace high pressure accumulator and the pump in EHB, by control path transmission of signal between electronic control unit and actuating unit, with motion setting device, rotatablely moving of motor is converted to straight-line motion and promotes master cylinder, make it to produce the motion of expectation, thereby realize ACTIVE CONTROL and the adjusting of hydraulic coupling.Between brake pedal and master brake cylinder, there is no hydraulic tubing, therefore do not have the problems such as hydraulic tubing leakage, high pressure accumulator potential safety hazard, more reliable, safety, and without master brake cylinder is changed, reduced cost.Adopt the braking of motor driven liquid pressing system, conveniently carry out the ACTIVE CONTROL of hydraulic coupling, and can pass through mechanical mechanism ACTIVE CONTROL treadle effort, and saved baroque pedal simulator, when making full use of the treadle effort that chaufeur steps on, realize the functions such as ABS, TCS.The vehicle of automatic Pilot need to not rely on manual braking, and the composite braking system of this form also meets the requirements.
Summary of the invention
The object of the present invention is to provide a kind of fluid pressure type Dual-motors Driving EHB, braking intention for accurate identification of driver, make full use of manpower, realize the ACTIVE CONTROL of hydraulic coupling, meet the brake request of automatic driving vehicle, realize the ACTIVE CONTROL of pedal, guarantee pedal sense, reclaim more braking energy; Between brake pedal and master brake cylinder, adopt mechanical connection, improved the safety and reliability of EHB.
To achieve these goals, solution of the present invention is: a kind of fluid pressure type Dual-motors Driving EHB, and it comprises: brake pedal; Master brake cylinder; Secondary master cylinder; Fluid reservoir; Pedal displacement sensor; Hydraulic coupling sensor; Electronic control unit ECU; Also comprise the first automatically controlled Linear Moving Module and the second automatically controlled Linear Moving Module, for system being carried out to hydraulic braking force and treadle effort ACTIVE CONTROL; Electronic stability control module ESC, for regulating the hydraulic braking force of each wheel cylinder; Threeway, for connecting the hydraulic tubing between described master brake cylinder and secondary master cylinder and described electronic stability control module ESC module entrance.
Further, described the first automatically controlled Linear Moving Module and the second automatically controlled Linear Moving Module comprise motor and motion adjusting mechanism, wherein the motion adjusting mechanism of the first automatically controlled Linear Moving Module by built-in push rod one end be connected with brake pedal, one end is connected with master brake cylinder first piston; The motion adjusting mechanism of the second automatically controlled Linear Moving Module is directly connected with secondary master cylinder first piston.
The first automatically controlled Linear Moving Module motor provides moment according to the size of actual hydraulic pressure power in desirable treadle effort and master brake cylinder, guarantees driver pedal sensation; The second automatically controlled Linear Moving Module motor provides moment according to the size of chaufeur braking intention and system regeneration braking force, guarantees required hydraulic braking force.
Described motion adjusting mechanism converts rotatablely moving of motor to straight-line motion.
Also comprise electromagnetic valve, by switch motion, guarantee that brake system has certain brake efficiency under failure mode.
Described electromagnetic valve comprises two normally open solenoid valves that lay respectively at described master brake cylinder the first epitrochoidal chamber and the second epitrochoidal chamber oil outlet place and two normally closed solenoid valves that lay respectively at described secondary master cylinder the first epitrochoidal chamber and the second epitrochoidal chamber oil outlet place, be used for controlling hydraulic tubing, realize the braking under different mode.
Between described master brake cylinder, secondary master cylinder, electromagnetic valve and electronic stability control module ESC, by hydraulic tubing, be connected; The hydraulic tubing connected with secondary master cylinder the first chamber oil outlet with described master brake cylinder is connected with a fuel feed hole of described electronic stability control module ESC module by threeway, and the hydraulic tubing connected with secondary master cylinder the second chamber oil outlet with described master brake cylinder is also connected with another fuel feed hole of described ESC module by threeway.
Described hydraulic coupling sensor is between the normally open solenoid valve and the threeway in respective line at master brake cylinder oil outlet place, for obtaining hydraulic line pressure.
In other words, the invention provides a kind of fluid pressure type Dual-motors Driving EHB, comprising: brake pedal; Master brake cylinder; Secondary master cylinder; Fluid reservoir, for storing braking liquid; Pedal displacement sensor, steps on the displacement signal of brake pedal for obtaining chaufeur; Hydraulic coupling sensor, for obtaining hydraulic line pressure; Electronic control unit (ECU), goes out control command for sensor-lodging, calculating and sending; Two automatically controlled Linear Moving Module, comprise rotating machine and motor are rotatablely moved and converts straight-line motion adjusting mechanism to, for system being carried out to hydraulic braking force and treadle effort ACTIVE CONTROL; Electronic stability control module (ESC), for regulating the hydraulic braking force of each wheel cylinder; Threeway, for connecting the hydraulic tubing between described master brake cylinder and secondary master cylinder and described ESC module entrance; Electromagnetic valve, for opening and closing the hydraulic tubing between described master brake cylinder and secondary master cylinder and described ESC module entrance, guarantees that by switch motion brake system has certain brake efficiency under failure mode.
The first Linear Moving Module, is connected with described master brake cylinder, according to the signal of described electronic control unit, rotatablely moving of motor is converted into straight-line motion, for system is carried out to treadle effort ACTIVE CONTROL; The second Linear Moving Module, is connected with described secondary master cylinder, according to the signal of described electronic control unit, rotatablely moving of motor is converted into straight-line motion, for system is carried out to hydraulic coupling ACTIVE CONTROL.
The first automatically controlled Linear Moving Module and the second automatically controlled Linear Moving Module comprise motor and motion adjusting mechanism, the motion adjusting mechanism of the first automatically controlled Linear Moving Module by built-in push rod one end be connected with brake pedal, one end is connected with master brake cylinder first piston, the motion adjusting mechanism of the second automatically controlled Linear Moving Module is directly connected with secondary master cylinder first piston.Two normally open solenoid valves are positioned at master brake cylinder the first epitrochoidal chamber and the second epitrochoidal chamber oil outlet place, and two normally closed solenoid valves are positioned at secondary master cylinder the first epitrochoidal chamber and the second epitrochoidal chamber oil outlet place.Between electromagnetic valve and master brake cylinder, secondary master cylinder and ESC module, by hydraulic tubing, be connected.The hydraulic tubing connected with secondary master cylinder the first chamber oil outlet with master brake cylinder is connected with a fuel feed hole of ESC module by threeway, and the hydraulic tubing connected with secondary master cylinder the second chamber oil outlet with master brake cylinder is also connected with another fuel feed hole of ESC module by threeway.Between the normally open solenoid valve at master brake cylinder oil outlet place and the threeway in respective line, be placed with hydraulic coupling sensor.
Preferably, the motion adjusting mechanism in described first, second automatically controlled Linear Moving Module comprises worm and gear and pinion and rack, guilde screw mechanism or ball-screw.
Preferably, described electromagnetic valve is high-speed switch electromagnetic valve (controlling by PWM) or linear solenoid valve (position feedback control).
Compare with existing EHB, the EHB tool of fluid pressure type Dual-motors Driving of the present invention has the following advantages:
1. adopt double-motor to collaborate controlled motion adjusting mechanism, reduced power of motor, improved electrical machinery life, fast response time, can control in real time hydraulic braking force, active adjustment, can provide hydraulic braking force for brake system by another motor when motor loses efficacy somewhere.
2. the regenerative brake power of the variation producing according to electric car drive electromotor regulates the size of hydraulic braking force, so that total braking force to be provided, takes full advantage of manpower, can correctly reflect the braking intention of chaufeur and reclaim substantially braking energy.
3. controlled motion adjusting mechanism after the signal that the motor of the first automatically controlled Linear Moving Module reception ECU (Electrical Control Unit) ECU sends, motion adjusting mechanism can apply application force to the push rod being connected with brake pedal, realize the ACTIVE CONTROL of treadle effort, guarantee the brake pedal feel of chaufeur, saved baroque pedal simulator.
4. the vehicle of automatic Pilot requires in the situation that there is no driver pedal power, not brake, now described automatically controlled ECU regulates the motor of first, second automatically controlled Linear Moving Module according to the signal receiving, produce hydraulic braking force, meet the brake request of automatic Pilot.
5. between brake pedal and master brake cylinder, keep mechanical connection, reduced the risk of thrashing, simultaneously the treadle effort of chaufeur is also a part for total braking force.When the first automatically controlled Linear Moving Module or the second automatically controlled Linear Moving Module inefficacy, brake pedal still can provide system required braking force together with mechanical connection and the automatically controlled Linear Moving Module not losing efficacy; When two automatically controlled Linear Moving Module lost efficacy simultaneously, chaufeur is stepped on brake pedal suddenly, and system also can produce certain braking force, has guaranteed reliability and the safety of motor vehicle braking system.
Accompanying drawing explanation
Fig. 1 is according to the sketch of a kind of fluid pressure type Dual-motors Driving EHB embodiment of the present invention.
Label in accompanying drawing represents:
1-brake pedal; 2-motor; 3-worm-and-wheel gear (not painting complete in figure); 4-fluid reservoir; 5-master brake cylinder first piston; 6-master brake cylinder the first epitrochoidal chamber; Pull back spring in 7-master brake cylinder the first epitrochoidal chamber; 8-master brake cylinder the second piston; Pull back spring in 9-master brake cylinder the second epitrochoidal chamber; 10-master brake cylinder the second epitrochoidal chamber; 11-master brake cylinder; 12-pedal displacement sensor; 13-pinion and rack (not painting complete in figure); 14,17-normally closed solenoid valve; 15,16-normally open solenoid valve; 18-hydraulic coupling sensor; 19-secondary master cylinder first piston; 20-secondary master cylinder the first epitrochoidal chamber; 21-secondary master cylinder the second piston; 22-secondary master cylinder the second epitrochoidal chamber; 23-secondary master cylinder; 24-pinion and rack (not painting complete in figure); 25-motor; 26-worm-and-wheel gear (not painting complete in figure); 27-ESC module; The 28-the first automatically controlled Linear Moving Module; The 29-the second automatically controlled Linear Moving Module; 30-ECU (Electrical Control Unit); 31,32-straight-line motion mechanism; 33,34,35,36,37-control path; 38-push rod; 39,40-threeway.
The specific embodiment
Below in conjunction with accompanying drawing institute example, the present invention is further illustrated.
As shown in Figure 1, this fluid pressure type Dual-motors Driving EHB mainly comprises the automatically controlled Linear Moving Module 29 of the automatically controlled Linear Moving Module 28, second of brake pedal 1, first, master brake cylinder 11, secondary master cylinder 23, electromagnetic valve 14, electromagnetic valve 15, electromagnetic valve 16, electromagnetic valve 17, pedal displacement sensor 12, hydraulic coupling sensor 18, ESC module 27, fluid reservoir 4, ECU (Electrical Control Unit) 30 and control path 33,34,35,36,37.The first automatically controlled Linear Moving Module 28 and the second automatically controlled Linear Moving Module 29 comprise motor and motion adjusting mechanism, the motion adjusting mechanism of the first automatically controlled Linear Moving Module by built-in push rod 38 one end be connected with brake pedal, one end is connected with master brake cylinder first piston, the motion adjusting mechanism of the second automatically controlled Linear Moving Module is directly connected with secondary master cylinder first piston.Two normally open solenoid valves 15,16 are positioned at master brake cylinder the first epitrochoidal chamber and the second epitrochoidal chamber oil outlet place, and two normally closed solenoid valves 14,17 are positioned at secondary master cylinder the first epitrochoidal chamber and the second epitrochoidal chamber oil outlet place.Between electromagnetic valve and master brake cylinder 11, secondary master cylinder 23 and ESC module 27, by hydraulic tubing, be connected.The hydraulic tubing connected with secondary master cylinder the first chamber oil outlet with master brake cylinder is connected with a fuel feed hole of ESC module by threeway 40, and the hydraulic tubing connected with secondary master cylinder the second chamber oil outlet with master brake cylinder is connected with another fuel feed hole of ESC module by threeway 39.Between the normally open solenoid valve at master brake cylinder oil outlet place and the threeway in respective line, be placed with hydraulic coupling sensor.
In this exemplary embodiment, motion adjusting mechanism the 31, the 32nd, the combination of worm-and-wheel gear and pinion and rack.Preferably, the tooth bar in motion adjusting mechanism 31 is hollow, built-in push rod 38.
Fluid pressure type Dual-motors Driving EHB specific works process of the present invention is as follows: chaufeur is stepped on brake pedal 1, displacement pickup 12 obtains pedal displacement signal, receive the braking intention of chaufeur, ECU (Electrical Control Unit) 30 obtains hydraulic braking force size P required in this time braking according to the signal collecting
h, and calculate the required adjusting power F of the second automatically controlled Linear Moving Module 29
2(F
2=P
ha
2, A
2for secondary master cylinder piston area), electromagnetic valve 14,15,16,17 is opened, by control path 34 drive motor 25, promote secondary master cylinder first piston 19 straight-line motions, when first piston 19 blocks the first compensation orifice, secondary master cylinder the first epitrochoidal chamber 20 starts to build pressure, then promote the second piston 21 straight-line motions, when the second piston 21 blocks the second compensation orifice, the second epitrochoidal chamber 22 starts to build pressure, braking liquid flows to ESC module 27 through electromagnetic valve 14,17 and hydraulic tubing, then flows to each wheel cylinder and produces braking force.ECU (Electrical Control Unit) 30 draws desirable treadle effort F corresponding to pedal displacement signal receiving according to brake pedal force and the ideal relationship curve of pedal stroke simultaneously
target_p, and the hydraulic coupling P recording in conjunction with hydraulic coupling sensor 18
1calculate the adjusting power that the first automatically controlled Linear Moving Module 28 should provide
f1(F
1=P
1a
1-F
target_pi, A
1for brake master cylinder piston area, i is brake pedal lever ratio), by the moment of control path 35 adjusting motors 2, guarantee driver pedal sensation.
When the required hydraulic braking force of system changes, increases or reduce Δ p due to the change of travel condition of vehicle, ECU (Electrical Control Unit) 30 regulates the moment of motors 25, and the adjusting power that makes the second automatically controlled Linear Moving Module 29 is F
2(F
2=(P
h± Δ
p) A
2, A
2for secondary master cylinder piston area), draw the adjusting power F that the first automatically controlled Linear Moving Module 28 is required simultaneously
1(F
1=(P
h± Δ p) A
1-F
target_pi, A
1for brake master cylinder piston area, i is brake pedal lever ratio), by control path 35, regulate the moment of motors 2, guarantee that driver pedal feels constant.
While requiring brake system must consider the generation of failure conditions and some brake component et out of order according to national legislation, also must be able to allow the power of chaufeur pedal be transferred in brake system, carry out the braking of some strength.Fluid pressure type Dual-motors Driving EHB of the present invention has also designed fail safe scheme.
When braking starts or a certain pipeline inefficacy between middle ESC module 27 and master brake cylinder 11 and secondary master cylinder 23 is carried out in braking, take that to be connected with the second epitrochoidal chamber of master brake cylinder 11 and secondary master cylinder 23 that Yi road pipeline lost efficacy be example, ECU (Electrical Control Unit) 30 receives fail message, electromagnetic valve 14,16 is closed, now the second epitrochoidal chamber of master brake cylinder 11 and secondary master cylinder 23 can be similar to and regard rigid body as, utilize its first epitrochoidal chamber to brake, in ACTIVE CONTROL hydraulic coupling, guaranteed pedal sense.When the Yi road pipeline that is connected with the first epitrochoidal chamber of master brake cylinder 11 and secondary master cylinder 23 loses efficacy, system works situation was similar.
Middle motor 2 is carried out in braking beginning or braking cannot provide moment or motion adjusting mechanism 31 damage so that cannot transmit motion, system is transmitted failure message to ECU (Electrical Control Unit) 30, electromagnetic valve 14,15,16,17 is opened, and the motor 25 in the second automatically controlled Linear Moving Module 29 is regulated to (F simultaneously
1=P
ha
2, A
2for secondary master cylinder piston area), actuation movement adjusting mechanism 32, promotes secondary master cylinder first piston 19 and does the straight-line motion of expecting, carries out the braking of each wheel cylinder with driver pedal power together with the hydraulic coupling producing.
Middle motor 25 is carried out in braking beginning or braking cannot provide moment or motion adjusting mechanism 32 damage so that cannot transmit motion, system is transmitted failure message to ECU (Electrical Control Unit) 30, electromagnetic valve 14,17 is closed, electromagnetic valve 15,16 is opened, and the motor 2 in the first automatically controlled Linear Moving Module 28 is regulated to (F simultaneously
1=P
ha
1, A
1for brake master cylinder piston area), 31 motions of actuation movement adjusting mechanism, promote master brake cylinder first piston 5 and do the straight-line motion of expecting.
Braking starts or braking carry out in first, second automatically controlled Linear Moving Module while simultaneously losing efficacy, system is transmitted failure message to ECU (Electrical Control Unit) 30, electromagnetic valve 14,17 is closed, electromagnetic valve 15,16 is opened, and now chaufeur is stepped on brake pedal suddenly, by push rod 38, directly promotes master brake cylinder, although there is no power-assisted, can not provide enough braking forces, but when emergency braking, this braking force to a certain degree still there is larger help to the safety of chaufeur.
The above-mentioned description to embodiment is can understand and apply the invention for ease of those skilled in the art.Person skilled in the art obviously can easily make various modifications to these embodiment, and General Principle described herein is applied in other embodiment and needn't passes through performing creative labour.Therefore, the invention is not restricted to the embodiment here, those skilled in the art are according to announcement of the present invention, and not departing from the improvement that category of the present invention makes and revise all should be within protection scope of the present invention.
Claims (8)
1. a fluid pressure type Dual-motors Driving EHB, it comprises: brake pedal; Master brake cylinder; Secondary master cylinder; Fluid reservoir; Pedal displacement sensor; Hydraulic coupling sensor; Electronic control unit ECU; It is characterized in that: also comprise the first automatically controlled Linear Moving Module and the second automatically controlled Linear Moving Module, for system being carried out to hydraulic braking force and treadle effort ACTIVE CONTROL; Electronic stability control module ESC, for regulating the hydraulic braking force of each wheel cylinder; Threeway, for connecting the hydraulic tubing between described master brake cylinder and secondary master cylinder and described electronic stability control module ESC module entrance.
2. fluid pressure type Dual-motors Driving EHB according to claim 1, is characterized in that:
Described the first automatically controlled Linear Moving Module and the second automatically controlled Linear Moving Module comprise motor and motion adjusting mechanism, wherein the motion adjusting mechanism of the first automatically controlled Linear Moving Module by built-in push rod one end be connected with brake pedal, one end is connected with master brake cylinder first piston; The motion adjusting mechanism of the second automatically controlled Linear Moving Module is directly connected with secondary master cylinder first piston.
3. fluid pressure type Dual-motors Driving EHB according to claim 2, is characterized in that:
The first automatically controlled Linear Moving Module motor provides moment according to the size of actual hydraulic pressure power in desirable treadle effort and master brake cylinder, guarantees driver pedal sensation; The second automatically controlled Linear Moving Module motor provides moment according to the size of chaufeur braking intention and system regeneration braking force, guarantees required hydraulic braking force.
4. fluid pressure type Dual-motors Driving EHB according to claim 2, is characterized in that:
Described motion adjusting mechanism converts rotatablely moving of motor to straight-line motion.
5. fluid pressure type Dual-motors Driving EHB according to claim 1, is characterized in that: also comprise electromagnetic valve, by switch motion, guarantee that brake system has certain brake efficiency under failure mode.
6. fluid pressure type Dual-motors Driving EHB according to claim 5, is characterized in that:
Described electromagnetic valve comprises two normally open solenoid valves that lay respectively at described master brake cylinder the first epitrochoidal chamber and the second epitrochoidal chamber oil outlet place and two normally closed solenoid valves that lay respectively at described secondary master cylinder the first epitrochoidal chamber and the second epitrochoidal chamber oil outlet place, be used for controlling hydraulic tubing, realize the braking under different mode.
7. fluid pressure type Dual-motors Driving EHB according to claim 6, is characterized in that:
Between described master brake cylinder, secondary master cylinder, electromagnetic valve and electronic stability control module ESC, by hydraulic tubing, be connected; The hydraulic tubing connected with secondary master cylinder the first chamber oil outlet with described master brake cylinder is connected with a fuel feed hole of described electronic stability control module ESC module by threeway, and the hydraulic tubing connected with secondary master cylinder the second chamber oil outlet with described master brake cylinder is also connected with another fuel feed hole of described ESC module by threeway.
8. fluid pressure type Dual-motors Driving EHB according to claim 1, is characterized in that:
Described hydraulic coupling sensor is between the normally open solenoid valve and the threeway in respective line at master brake cylinder oil outlet place, for obtaining hydraulic line pressure.
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| CN201410148263.7A CN103950445A (en) | 2014-04-14 | 2014-04-14 | Hydraulic double-motor driving electronic hydraulic braking system |
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| CN201410148263.7A CN103950445A (en) | 2014-04-14 | 2014-04-14 | Hydraulic double-motor driving electronic hydraulic braking system |
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| CN104309597A (en) * | 2014-09-26 | 2015-01-28 | 同济大学 | Control method for hydraulic dual motor-driven electronic hydraulic braking system |
| CN104442409A (en) * | 2014-11-13 | 2015-03-25 | 奇瑞汽车股份有限公司 | Electric vehicle braking energy recovery controller and control method thereof |
| CN104760586A (en) * | 2015-03-31 | 2015-07-08 | 同济大学 | Double-motor driving type electronic hydraulic brake system capable of actively simulating pedal feeling |
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| CN106864440A (en) * | 2017-01-20 | 2017-06-20 | 南京航空航天大学 | A kind of self-boosting type brake pedal feel analogue means |
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| CN108545072A (en) * | 2018-06-04 | 2018-09-18 | 上汽通用汽车有限公司 | Hydraulic braking servomechanism and its power-assisted adjusting method |
| CN109204283A (en) * | 2018-10-29 | 2019-01-15 | 华东交通大学 | A kind of electronic hydraulic brake system obtaining braking intention based on motor |
| CN109552314A (en) * | 2019-01-14 | 2019-04-02 | 魏翼鹰 | A kind of cooperative control system for new-energy automobile ESC |
| CN110015285A (en) * | 2017-12-22 | 2019-07-16 | 罗伯特·博世有限公司 | Motor vehicle braking system and its operating method |
| EP3529118B1 (en) | 2016-10-20 | 2020-12-02 | ZF Active Safety GmbH | System comprising separate control units for the actuation units of an electric parking brake |
| CN112356817A (en) * | 2020-11-25 | 2021-02-12 | 吉林大学 | Unmanned automobile braking system with backup mode and control method thereof |
| WO2022022254A1 (en) * | 2020-07-29 | 2022-02-03 | 中国第一汽车股份有限公司 | Brake redundancy method, system and self-driving vehicle |
| EP4190650A1 (en) * | 2021-12-02 | 2023-06-07 | BWI (Shanghai) Co., Ltd. | Electronic stability control-based brake actuation with redundancy |
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Application publication date: 20140730 |