CN109204262A - A kind of electronic hydraulic brake system of dual power source hydraulic failure backup - Google Patents
A kind of electronic hydraulic brake system of dual power source hydraulic failure backup Download PDFInfo
- Publication number
- CN109204262A CN109204262A CN201811005842.0A CN201811005842A CN109204262A CN 109204262 A CN109204262 A CN 109204262A CN 201811005842 A CN201811005842 A CN 201811005842A CN 109204262 A CN109204262 A CN 109204262A
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- 230000009977 dual effect Effects 0.000 title claims abstract description 19
- 230000008878 coupling Effects 0.000 claims abstract description 48
- 238000010168 coupling process Methods 0.000 claims abstract description 48
- 238000005859 coupling reaction Methods 0.000 claims abstract description 48
- 230000006837 decompression Effects 0.000 claims abstract description 16
- 230000007246 mechanism Effects 0.000 claims description 26
- 239000012530 fluid Substances 0.000 claims description 14
- 230000009467 reduction Effects 0.000 claims description 13
- 230000005611 electricity Effects 0.000 claims description 5
- 230000005540 biological transmission Effects 0.000 claims description 3
- 238000010276 construction Methods 0.000 claims description 3
- 230000009897 systematic effect Effects 0.000 claims description 3
- 239000007788 liquid Substances 0.000 description 6
- 230000008901 benefit Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000001172 regenerating effect Effects 0.000 description 2
- 241000237858 Gastropoda Species 0.000 description 1
- 206010039203 Road traffic accident Diseases 0.000 description 1
- 230000003749 cleanliness Effects 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
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Classifications
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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
- B60T8/36—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 including a pilot valve responding to an electromagnetic force
- B60T8/3615—Electromagnetic valves specially adapted for anti-lock brake and traction control systems
- B60T8/363—Electromagnetic valves specially adapted for anti-lock brake and traction control systems in hydraulic systems
-
- 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
- B60T13/662—Electrical control in fluid-pressure brake systems characterised by specified functions of the control system components
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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
-
- 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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- 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
- B60T8/88—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 with failure responsive means, i.e. means for detecting and indicating faulty operation of the speed responsive control means
Abstract
The present invention relates to a kind of electronic hydraulic brake system of dual power source hydraulic failure backup, the system is when the vehicle is braked, the brake signal issued according to ECU, it controls motor work and generates torque, it pushes master cylinder push rod to build pressure, realizes wheel cylinder hydraulic pressure power independent control by four normally open solenoid valves and four hydraulic force snesors；Fast decompression can be both assisted by two normally closed solenoid valves of addition, a low pressure accumulator and a hydraulic pump, so that low tension loop hydraulic coupling is stablized, establishes wheel cylinder hydraulic pressure power but also as back-up power source.Compared with prior art, wheel cylinder of the present invention depressurizes fast and flexible, requires magnetic valve performance lower, it can be achieved that braking anti-lock function；In addition, the present invention have auxiliary standby power source, it can be achieved that failure backup functionality, securely and reliably.
Description
Technical field
The present invention relates to automobile brake technical fields, more particularly, to a kind of electronics liquid of dual power source hydraulic failure backup
Press braking system.
Background technique
Due to becoming increasingly conspicuous for energy shortage and environmental problem, electric car is with its cleanliness without any pollution, energy efficiency height etc.
Advantage becomes the Main way of auto industry future development.With the raising and traffic accident of intelligent requirements, traffic congestion
The problems such as need to solve, more Automobile Enterprises such as continent, general carry out the research of automatic driving vehicle, the development of automatic Pilot technology
Rapidly.Braking system, which carries out braking not against manpower in Vehicular automatic driving, becomes problem to be solved.
Electronic hydraulic brake system (electro hydraulic brake system, EHB) is a kind of more novel
Braking system is one kind of line control brake system, it is led with electronic component instead of some mechanical element, brake pedal and braking
It is no longer connected directly between cylinder, acquires driver's operation information using sensor and identifies that control is intended to, completely by hydraulic execution
Device completes brake operating.New-energy automobile is in braking process, while hydraulic braking force is applied to wheel, makes driving motor
Work also applies regenerative braking force to wheel in regenerative electric power braking state, to recycle while completing vehicle effective brake
The energy that generates when braking is simultaneously stored in energy storage device for utilizing again.
Electronic hydraulic brake system has some advantages compared with traditional liquid braking device: (1) it is compact-sized, improve system
Dynamic performance；(2) easy to control reliable, brake oil is substantially reduced；(3) vacuum plant is not needed, brake pedal is effectively reduced
Feeling etc..Due to the above-mentioned advantage of electronic hydraulic brake system, early in 1993, Ford Motor Company was just in a electronic vapour
EHB system is mounted on vehicle, later General Corporation also uses EHB on its Cars.Currently, what Benz Co. newly released
SL500 equally uses EHB, is that first volume production vehicle using brake-by-wire technology, its EHB technology are public by Bosch in the world
A part that department provides and electrically controlled brake system SBC (Sensotronic Brake Control).
For existing brake system of car when main power source fails, the power source that can not back up carrys out auxiliary system fortune
Make, causes the reliability of system poor.In addition, existing brake system of car component is more, volume is larger, and wheel cylinder depressurizes
Speed is slower, and the control when realizing braking anti-lock function is poor.
Summary of the invention
It is an object of the present invention to overcome the above-mentioned drawbacks of the prior art and provide a kind of dual power source is hydraulic
Fail the electronic hydraulic brake system backed up.
The purpose of the present invention can be achieved through the following technical solutions:
A kind of electronic hydraulic brake system of dual power source hydraulic failure backup, including brake control module and braking mould
Block, the brake control module include master cylinder and the fluid reservoir that connect with master cylinder, and the brake module includes
Front-wheel branch, the rear-wheel branch being separately connected with master cylinder, the front-wheel branch is including the near front wheel wheel cylinder
Off-front wheel wheel cylinder branch including the near front wheel wheel cylinder branch and off-front wheel wheel cylinder, the rear-wheel branch includes left rear wheel system
The off hind wheel wheel cylinder branch including left rear wheel wheel cylinder branch and off hind wheel wheel cylinder including driving wheel cylinder, the brake module
It further include auxiliary power resource loop and Failure Control unit, one end of the Failure Control unit is connect with master cylinder, separately
One end is connect with fluid reservoir, when front-wheel branch using master cylinder depressurize when, left rear wheel wheel cylinder branch, off hind wheel wheel cylinder branch it
Between be equipped with auxiliary power resource loop, when rear-wheel branch using master cylinder depressurize when, the near front wheel wheel cylinder branch, off-front wheel wheel cylinder branch
Auxiliary power resource loop is equipped between road.
Preferably, the brake control module further includes ECU and the motor connecting respectively with ECU, reduction gearing mechanism
And brake pedal, the reduction gearing mechanism include worm screw, the worm gear being connect with worm screw, with worm gear coaxial arrangement gear and
The rack gear connecting with gear, the motor are connect with reduction gearing mechanism, the push rod and deceleration transmission of the master cylinder
The rack gear of mechanism connects.
Preferably, the auxiliary power resource loop includes low pressure accumulator, check valve and hydraulic pump, and the low pressure stores
Energy device passes through the first normally closed solenoid valve with left rear wheel wheel cylinder, off hind wheel wheel cylinder respectively, the second normally closed solenoid valve is connect,
Or pass through third normally closed solenoid valve respectively with the near front wheel wheel cylinder, off-front wheel wheel cylinder, the 4th normally closed solenoid valve is connect, institute
The one end for the hydraulic pump stated is connect with master cylinder, and the other end is connect with check valve, and the check valve passes through the first normally closed electricity
Magnet valve connect with left rear wheel wheel cylinder or is connect by third normally closed solenoid valve with the near front wheel wheel cylinder, the check valve
It is connect by the second normally closed solenoid valve with off hind wheel wheel cylinder or is connected by the 4th normally closed solenoid valve and off-front wheel wheel cylinder
It connects.
Preferably, the Failure Control unit includes secondary master cylinder, adjustment mechanism, decoupling cylinder, pedal sense simulator
It is connect with one end of three Failure Control solenoid valves, the decoupling cylinder with the push rod of automatic master cylinder, the other end and adjustment mechanism,
Secondary master cylinder accesses brake pedal after being sequentially connected, the secondary master cylinder and pedal sense simulator pass through secondary master cylinder hydraulic pressure
Force snesor connection, pedal sense simulator, secondary master cylinder, decoupling cylinder are each by a Failure Control solenoid valve and fluid reservoir
Connection.
Preferably, the adjustment mechanism is a mechanical adapter.
Preferably, master cylinder passes through sequentially connected first master cylinder hydraulic pressure force snesor, the first normally open solenoid valve, first
Wheel cylinder hydraulic pressure force snesor accesses the near front wheel wheel cylinder, and master cylinder is sensed by sequentially connected first master cylinder hydraulic pressure power
Device, the second normally open solenoid valve, the second wheel cylinder hydraulic pressure force snesor be sequentially connected after access off-front wheel wheel cylinder, master cylinder with
Second master cylinder hydraulic pressure force snesor, the 4th normally open solenoid valve, the hydraulic force snesor of fourth round cylinder access off hind wheel after being sequentially connected
Wheel cylinder, master cylinder and the second master cylinder hydraulic pressure force snesor, third normally open solenoid valve, third wheel cylinder hydraulic coupling sensor according to
Left rear wheel wheel cylinder is accessed after secondary connection.
Preferably, ECU and three Failure Control solenoid valve, secondary master cylinder hydraulic pressure force snesor, the first master cylinder liquid
Pressure sensor, the second master cylinder hydraulic pressure force snesor, the first normally open solenoid valve, the second normally open solenoid valve, third normally open solenoid valve,
4th normally open solenoid valve, the first normally closed solenoid valve, the second normally closed solenoid valve are separately connected.
Preferably, which includes two kinds of power source operating modes, particular content are as follows:
When normal work, ECU obtains control motor rotation after the brake signal of brake pedal, pushes away by reduction gearing mechanism
The push rod of dynamic master cylinder makes braking system construction in a systematic way pressure, and the corresponding normally open solenoid valve of each wheel cylinder is opened, and each wheel cylinder generates
Brake force, ECU control Failure Control valve communicates pedal sense simulator with fluid reservoir, and closes secondary master cylinder, thus steps on
Plate sense simulator is felt；
When motor failure, Failure Control solenoid valve makes secondary master cylinder, adjustment mechanism and decoupling cylinder be equivalent to be rigidly connected,
Master cylinder decompression will be pushed directly on by, which stepping on after brake pedal, builds pressure, and each wheel cylinder generation brake force, hydraulic pump is as spare
The pressurization of power source auxiliary braking master cylinder.
Preferably, when system is run, the hydraulic coupling control of each wheel cylinder of each wheel cylinder and rear-wheel of front-wheel
It is made as independent control, specifically includes the following steps:
1) brake pedal, ECU obtain the demand braking force of each wheel cylinder；
2) motor rotates, and adjusts the hydraulic coupling of master cylinder；
3) demand braking force of each wheel cylinder of ECU is carried out only by hydraulic coupling of the control solenoid valve to each wheel cylinder
It is vertical to adjust；
4) master cylinder pressure release is made by motor reversal, low pressure accumulator pressure release is made by hydraulic pump operation.
In step 3), when front-wheel branch is depressurized using master cylinder, between left rear wheel wheel cylinder branch, off hind wheel wheel cylinder branch
When equipped with auxiliary power resource loop, which adjusts the concrete principle of pressure are as follows:
When front-wheel needs to be pressurized, the push rod realization system boost of the rotating forward promotion master cylinder of ECU control motor, first
Normally open solenoid valve, the power-off of the second normally open solenoid valve, front-wheel hydraulic coupling improve；When front-wheel needs to depressurize, ECU controls motor reversal
The system hydraulic coupling of master cylinder, the first normally open solenoid valve, the power-off of the second normally open solenoid valve are reduced, front-wheel hydraulic coupling reduces；When
When front-wheel needs pressure maintaining, the first normally open solenoid valve, the second normally open solenoid valve are powered, and closing front wheel brake circuit makes front-wheel pressure maintaining；
When rear-wheel needs to be pressurized, the rotating forward that ECU controls motor pushes the push rod of master cylinder to realize system boost, third
Normally open solenoid valve, the power-off of the 4th normally open solenoid valve, rear-wheel hydraulic coupling improve；When rear-wheel needs to depressurize, the correspondence that needs to depressurize
The normally open solenoid valve power-off of wheel cylinder is opened, normally closed solenoid valve is powered and opens, and assists left rear wheel by low pressure accumulator and hydraulic pump
Wheel cylinder or off hind wheel wheel cylinder fast decompression；When rear-wheel needs pressure maintaining, third normally open solenoid valve, the 4th normally opened electromagnetism
Valve is powered, and the first normally closed solenoid valve, the power-off of the second normally closed solenoid valve, closing rear service brake circuit makes rear-wheel wheel cylinder pressure maintaining；
When front-wheel needs to be pressurized, rear-wheel needs to depressurize, the rotating forward that ECU controls motor pushes the push rod of master cylinder to realize
System boost, the first normally open solenoid valve, the power-off of the second normally open solenoid valve open, so that front-wheel hydraulic coupling improves, need to depressurize
The normally open solenoid valve energization of corresponding wheel cylinder is closed, normally closed solenoid valve is powered and opens, and makes a left side by low pressure accumulator and hydraulic pump
Rear service brake wheel cylinder or the decompression of off hind wheel wheel cylinder；
When front-wheel needs to depressurize, rear-wheel needs to be pressurized, the system that ECU controls motor reversal reduction master cylinder is hydraulic
Power, the first normally open solenoid valve, the power-off of the second normally open solenoid valve are opened, and front-wheel hydraulic coupling reduces, and third normally open solenoid valve, the 4th are often
Open electromagnetic valve, which is powered, closes, rear-wheel pressure maintaining；When front-wheel meets decompression demand, the first normally open solenoid valve, the second normally open solenoid valve
It is powered and closes, front-wheel pressure maintaining, the rotating forward that ECU controls motor pushes the push rod of master cylinder to realize system boost, the normally opened electricity of third
Magnet valve, the power-off of the 4th normally open solenoid valve are opened, and rear-wheel hydraulic coupling improves.
When auxiliary power resource loop is set to front-wheel wheel cylinder branch, the realization step and auxiliary power resource loop of this system are set
Principle when rear-wheel wheel cylinder branch is identical.
Compared with prior art, the invention has the following advantages that
(1) present invention using hydraulic pump as auxiliary standby power source, when main power source motor failure, hydraulic pump and
The combination of low pressure accumulator can be realized wheel cylinder and build pressure, improve the reliability of system；
(2) front-wheel of present system or rear-wheel wheel cylinder depressurize fast and flexible, lower to magnetic valve performance requirement, only need four
Braking anti-lock function can be realized in a normally open solenoid valve, two normally closed solenoid valves, a low pressure accumulator and a hydraulic pump,
Good control effect can be obtained；
(3) present system is depressurized using motor, compact, the weight saving of system entirety；
(4) each wheel cylinder of present system can independent control, wheel cylinder increase Decompression Controlling it is flexible, the decompression of wheel cylinder can be improved
Speed.
Detailed description of the invention
Fig. 1 is the electro-hydraulic system for having the backup of dual power source hydraulic failure when rear-wheel wheel cylinder connects auxiliary power resource loop
The structural schematic diagram of dynamic system；
Fig. 2 is the electro-hydraulic system for having the backup of dual power source hydraulic failure when front-wheel wheel cylinder connects auxiliary power resource loop
The structural schematic diagram of dynamic system；
Fig. 3 is workflow schematic diagram when present system adjusts pressure；
In Fig. 1, Fig. 2 shown in label:
1, ECU, 2, battery, 3, DC/AC converter, 4, motor, 5, reduction gearing mechanism, 6, fluid reservoir, 7, braking step on
Plate, 8, pedal displacement sensor, 9, secondary master cylinder, 10, adjustment mechanism, 11, decoupling cylinder, 12, master cylinder, 13, pedal sense
Simulator, 14, secondary master cylinder hydraulic pressure force snesor, the 15, first normally open solenoid valve, the 16, second normally open solenoid valve, 17, third it is normal
Open electromagnetic valve, the 18, the 4th normally open solenoid valve, the 19, first normally closed solenoid valve, the 20, second normally closed solenoid valve, the 21, first wheel cylinder liquid
Pressure sensor, the 22, second wheel cylinder hydraulic pressure force snesor, 23, third wheel cylinder hydraulic coupling sensor, 24, fourth round cylinder hydraulic coupling
Sensor, 25, the near front wheel wheel cylinder, 26, off-front wheel wheel cylinder, 27, left rear wheel wheel cylinder, 28, off hind wheel braked wheel
Cylinder, the 29, first Failure Control solenoid valve, the 30, second Failure Control solenoid valve, 31, third Failure Control solenoid valve, 32, first
Master cylinder hydraulic pressure force snesor, the 33, second master cylinder hydraulic pressure force snesor, 34, low pressure accumulator, 35, check valve, 36, hydraulic pump,
37, third normally closed solenoid valve, the 38, the 4th normally closed solenoid valve.
Specific embodiment
The present invention is described in detail with specific embodiment below in conjunction with the accompanying drawings.
The present invention relates to a kind of electronic hydraulic brake system of dual power source hydraulic failure backup, and the system is by ECU1
(Electronic Control Unit, electronic control unit), battery 2, DC/AC converter 3, motor 4, deceleration transmission machine
Structure 5, fluid reservoir 6, brake pedal 7, secondary master cylinder 9, adjustment mechanism 10, decoupling cylinder 11, master cylinder 12, pedal sense simulator
13, solenoid valve, low pressure accumulator 34, hydraulic pump 36, check valve 35, hydraulic force snesor, wheel cylinder control solenoid valve and braked wheel
Cylinder composition.
ECU1 controls each solenoid valve and hydraulic force snesor.ECU1 is connect with DC/AC converter 3, DC/AC converter 3
It is connect with motor 4, motor 4 is connect with reduction gearing mechanism 5.Reduction gearing mechanism 5 includes the worm screw connecting with motor 4 and and snail
Worm gear, rack gear and the rack gear of bar connection.Master cylinder 12 includes cylinder body, piston, push rod, ante-chamber, back cavity.With master cylinder 12
Connection, the push rod of master cylinder 12 and decoupling cylinder 11, adjustment mechanism 10, secondary master cylinder 9, reduction gearing mechanism 5 rack gear successively
Connection.Secondary master cylinder 9 is connect with brake pedal 7, and brake pedal 7 is connect with pedal displacement sensor 8, pedal displacement sensor 8
It is separately connected with ECU 1.The preferred mechanical adapter of adjustment mechanism 10.
Secondary master cylinder 9 is connect with secondary master cylinder hydraulic pressure force snesor 14, and secondary master cylinder hydraulic pressure force snesor 14 and first loses
Effect control solenoid valve 29 connects, and the first Failure Control solenoid valve 29 is connect with fluid reservoir 6.Secondary master cylinder 9 and the second Failure Control
Solenoid valve 30 connects, and the second Failure Control solenoid valve 30 is connect with fluid reservoir 6.Decouple cylinder 11 and third Failure Control solenoid valve 31
Connection, third Failure Control solenoid valve 31 are connect with fluid reservoir 6.
It includes the first Failure Control solenoid valve 29, the second Failure Control solenoid valve 30 and third failure that wheel cylinder, which controls solenoid valve,
Control solenoid valve 31.
Fluid reservoir 6 is connect with the fuel feed hole of master cylinder 12.Master cylinder 12 and the first master cylinder hydraulic pressure force snesor 32,
One normally open solenoid valve 15, the first wheel cylinder hydraulic coupling sensor 21 access the near front wheel wheel cylinder 25 after being sequentially connected.Master cylinder
12 and after the first master cylinder hydraulic pressure force snesor 32, the second normally open solenoid valve 16, the second wheel cylinder hydraulic pressure force snesor 22 be sequentially connected
Access off-front wheel wheel cylinder 26.The back cavity of master cylinder 12 and the second master cylinder hydraulic pressure force snesor 33, the 4th normally open solenoid valve
18, off hind wheel wheel cylinder 28 is accessed after the hydraulic force snesor 24 of fourth round cylinder is sequentially connected.Master cylinder 12 and the second master cylinder
Hydraulic force snesor 33, third normally open solenoid valve 17, third wheel cylinder hydraulic coupling sensor 23 access left rear wheel system after being sequentially connected
Driving wheel cylinder 27.
As shown in Figure 1, master cylinder 12 is sequentially connected and is followed by with hydraulic pump 36, check valve 35, the second normally closed solenoid valve 20
Enter off hind wheel wheel cylinder 28.Check valve 35 is connect with low pressure accumulator 34, low pressure accumulator 34 and the first normally closed solenoid valve 19
Left rear wheel wheel cylinder 27 is accessed after connection.
As shown in Fig. 2, master cylinder 12 is sequentially connected and is followed by with hydraulic pump 36, check valve 35, third normally closed solenoid valve 37
Enter the near front wheel wheel cylinder 25.Check valve 35 is connect with low pressure accumulator 34, low pressure accumulator 34 and the 4th normally closed solenoid valve 38
Left rear wheel wheel cylinder 26 is accessed after connection.
When normal work, ECU 1 obtains motor 4 after driver steps on the brake signal of brake pedal 7 and rotates, and passes by slowing down
Motivation structure 5 pushes the push rod of master cylinder 12 to make braking system construction in a systematic way pressure.The corresponding normally open solenoid valve of each wheel cylinder 15,16,17,
18 maintain a normally open, and each wheel cylinder generates brake force.Make pedal sense simulator 13 and storage by Failure Control valve 29,30,31
Flow container 6 communicates, and secondary master cylinder 9 is closed, and thus simulates pedal sense.
When motor 4 fails, the first Failure Control solenoid valve 29, the second Failure Control solenoid valve 30, third Failure Control
Solenoid valve 31 makes secondary master cylinder 9, adjustment mechanism 10 and decoupling, and cylinder 11 is equivalent is considered to be rigidly connected,
Master cylinder 12 will be pushed directly on by, which stepping on after brake pedal 7, builds pressure, and each wheel cylinder generates power.Hydraulic pump 36 can also
It is pressurized as back-up power source auxiliary braking master cylinder 12.
In system operation, the hydraulic coupling control of each wheel cylinder of each wheel cylinder and rear-wheel of front-wheel is independent control, tool
Body the following steps are included:
1) brake pedal 7, ECU1 obtain the demand braking force of each wheel cylinder；
2) motor 4 rotates, and adjusts the hydraulic coupling of master cylinder 12；
3) ECU1 is according to the demand braking force of each wheel cylinder, by control solenoid valve to the hydraulic coupling of each wheel cylinder into
Row is separately adjustable；
4) it is inverted by motor 4 so that 12 pressure release of master cylinder, is run by hydraulic pump 36 so that low pressure accumulator 34 is let out
Pressure.
In step 3), when front-wheel branch is depressurized using master cylinder 12, as shown in Figure 1, behind left rear wheel wheel cylinder branch 27, the right side
When taking turns between wheel cylinder branch 28 equipped with auxiliary power resource loop, specifically:
When front-wheel needs to be pressurized, the rotating forward that ECU1 controls motor 4 pushes the push rod of master cylinder 12 to realize system boost,
First normally open solenoid valve 15, the power-off of the second normally open solenoid valve 16, front-wheel hydraulic coupling improve；When front-wheel needs to depressurize, ECU1 control
The reversion of motor 4 processed reduces the system hydraulic coupling of master cylinder 12, and the first normally open solenoid valve 15, the second normally open solenoid valve 16 power off,
Front-wheel hydraulic coupling reduces；When front-wheel needs pressure maintaining, the first normally open solenoid valve 15, the second normally open solenoid valve 16 close front-wheel system
Dynamic circuit makes front-wheel pressure maintaining.
When rear-wheel needs to be pressurized, the rotating forward that ECU1 controls motor 4 pushes the push rod of master cylinder 12 to realize system boost,
Third normally open solenoid valve 17, the power-off of the 4th normally open solenoid valve 18, rear-wheel hydraulic coupling improve；When rear-wheel needs to depressurize, need to subtract
The normally open solenoid valve power-off of the correspondence wheel cylinder of pressure is opened, normally closed solenoid valve is powered and opens, and passes through low pressure accumulator 34 and hydraulic pump
36 auxiliary left rear wheel wheel cylinders 27 or 28 fast decompression of off hind wheel wheel cylinder；When rear-wheel needs pressure maintaining, the normally opened electricity of third
Magnet valve 17, the 4th normally open solenoid valve 18 are powered, and the first normally closed solenoid valve 19, the power-off of the second normally closed solenoid valve 20 close rear-wheel system
Dynamic circuit makes rear-wheel wheel cylinder pressure maintaining.
When front-wheel needs to be pressurized, rear-wheel needs to depressurize, the rotating forward that ECU1 controls motor 4 pushes the push rod of master cylinder 12
Realize system boost, the first normally open solenoid valve 15, the power-off of the second normally open solenoid valve 16 are opened, so that front-wheel hydraulic coupling improves, needed
The normally open solenoid valve energization for the correspondence wheel cylinder to be depressurized is closed, normally closed solenoid valve is powered and opens, and passes through low pressure accumulator 34 and liquid
Press pump 36 depressurizes left rear wheel wheel cylinder 27 or off hind wheel wheel cylinder 28.
When front-wheel needs to depressurize, rear-wheel needs to be pressurized, ECU1, which controls the reversion of motor 4, reduces the system liquid of master cylinder 12
Pressure, the first normally open solenoid valve 15, the power-off of the second normally open solenoid valve 16 are opened, and front-wheel hydraulic coupling reduces, third normally open solenoid valve
17, the 4th normally open solenoid valve 18, which is powered, closes, rear-wheel pressure maintaining；When front-wheel meets decompression demand, the first normally open solenoid valve 15,
Two normally open solenoid valves 16, which are powered, closes, and front-wheel pressure maintaining, the rotating forward that ECU1 controls motor 4 pushes the push rod of master cylinder 12 to realize system
System pressurization, third normally open solenoid valve 17, the power-off of the 4th normally open solenoid valve 18 are opened, and rear-wheel hydraulic coupling improves.
When auxiliary power resource loop is set to front-wheel wheel cylinder branch, as shown in Fig. 2, the realization step of this system and auxiliary are dynamic
Principle when power resource loop is set on rear-wheel wheel cylinder branch is identical, and details are not described herein again.
The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any
The staff for being familiar with the art in the technical scope disclosed by the present invention, can readily occur in various equivalent modifications or replace
It changes, these modifications or substitutions should be covered by the protection scope of the present invention.Therefore, protection scope of the present invention should be with right
It is required that protection scope subject to.
Claims (10)
1. a kind of electronic hydraulic brake system of dual power source hydraulic failure backup, including brake control module and brake module,
The brake control module includes master cylinder (12) and the fluid reservoir (6) connecting with master cylinder (12), the braking
Module includes the front-wheel branch being separately connected with master cylinder (12), rear-wheel branch, and the front-wheel branch includes the near front wheel system
The off-front wheel wheel cylinder branch including the near front wheel wheel cylinder branch and off-front wheel wheel cylinder (26) including driving wheel cylinder (25), it is described
Including left rear wheel wheel cylinder branch and off hind wheel wheel cylinder (28) of the rear-wheel branch including left rear wheel wheel cylinder (27)
Off hind wheel wheel cylinder branch, which is characterized in that the brake module further includes auxiliary power resource loop and Failure Control unit, institute
The one end for the Failure Control unit stated is connect with master cylinder (12), and the other end is connect with fluid reservoir (6), when front-wheel branch uses
When master cylinder (12) depressurizes, it is equipped with auxiliary power resource loop between left rear wheel wheel cylinder branch, off hind wheel wheel cylinder branch, works as rear-wheel
When branch is depressurized using master cylinder (12), returned between the near front wheel wheel cylinder branch, off-front wheel wheel cylinder branch equipped with auxiliary power source
Road.
2. a kind of electronic hydraulic brake system of dual power source hydraulic failure backup according to claim 1, feature exist
In the brake control module further includes ECU (1) and the motor (4) connecting respectively with ECU (1), reduction gearing mechanism (5)
With brake pedal (7), the reduction gearing mechanism (5) includes that worm screw, the worm gear connecting with worm screw and worm gear are coaxially disposed
Gear and the rack gear connecting with gear, the motor (4) are connect with reduction gearing mechanism (5), the master cylinder (12)
Push rod connect with the rack gear of reduction gearing mechanism (5).
3. a kind of electronic hydraulic brake system of dual power source hydraulic failure backup according to claim 2, feature exist
In the auxiliary power resource loop includes low pressure accumulator (34), check valve (35) and hydraulic pump (36), and the low pressure stores
Can device (34) and left rear wheel wheel cylinder (27), off hind wheel wheel cylinder (28) pass through the first normally closed solenoid valve (19), the respectively
Two normally closed solenoid valves (20) connection, or it is normal by third respectively with the near front wheel wheel cylinder (25), off-front wheel wheel cylinder (26)
Solenoid valve (37), the connection of the 4th normally closed solenoid valve (38) are closed, one end of the hydraulic pump (36) is connect with master cylinder (12),
The other end is connect with check valve (35), and the check valve (35) passes through the first normally closed solenoid valve (19) and left rear wheel wheel cylinder
(27) it connects or is connect by third normally closed solenoid valve (37) with the near front wheel wheel cylinder (25), the check valve (35) passes through
Second normally closed solenoid valve (20) connect with off hind wheel wheel cylinder (28) or by the 4th normally closed solenoid valve (38) and off-front wheel system
Driving wheel cylinder (26) connection.
4. a kind of electronic hydraulic brake system of dual power source hydraulic failure backup according to claim 3, feature exist
In the Failure Control unit includes secondary master cylinder (9), adjustment mechanism (10), decoupling cylinder (11), pedal sense simulator
(13) connect with three Failure Control solenoid valves, one end of the decoupling cylinder (11) with the push rod of automatic master cylinder, the other end with
Adjustment mechanism (10), secondary master cylinder (9) access brake pedal (7) after being sequentially connected, the secondary master cylinder (9) and pedal sense
Simulator (13) passes through secondary master cylinder hydraulic pressure force snesor (14) and connects, pedal sense simulator (13), secondary master cylinder (9), solution
Coupling cylinder (11) is connect each by a Failure Control solenoid valve with fluid reservoir (6).
5. a kind of electronic hydraulic brake system of dual power source hydraulic failure backup according to claim 4, feature exist
In master cylinder (12) passes through sequentially connected first master cylinder hydraulic pressure force snesor (32), the first normally open solenoid valve (15), first
Wheel cylinder hydraulic pressure force snesor (21) accesses the near front wheel wheel cylinder (25), and master cylinder (12) passes through sequentially connected first master cylinder
Hydraulic force snesor (32), the second normally open solenoid valve (16), the second wheel cylinder hydraulic pressure force snesor (22) access right after being sequentially connected
Front wheel cylinder (26), master cylinder (12) and the second master cylinder hydraulic pressure force snesor (33), the 4th normally open solenoid valve (18), the
Four wheel cylinder hydraulic coupling sensors (24) access off hind wheel wheel cylinder (28) after being sequentially connected, master cylinder (12) and the second master cylinder
Hydraulic force snesor (33), third normally open solenoid valve (17), third wheel cylinder hydraulic coupling sensor (23) access left after being sequentially connected
Rear service brake wheel cylinder (27).
6. a kind of electronic hydraulic brake system of dual power source hydraulic failure backup according to claim 5, feature exist
In the ECU (1) and three Failure Control solenoid valves, secondary master cylinder (9) hydraulic force snesor (14), the first master cylinder hydraulic pressure
Force snesor (32), the second master cylinder hydraulic pressure force snesor (33), the first normally open solenoid valve (15), the second normally open solenoid valve (16),
Third normally open solenoid valve (17), the 4th normally open solenoid valve (18), the first normally closed solenoid valve (19), the second normally closed solenoid valve (20) point
It does not connect.
7. a kind of electronic hydraulic brake system of dual power source hydraulic failure backup according to claim 6, feature exist
In the system includes two kinds of power source operating modes, particular content are as follows:
(1) when working normally, ECU (1) obtains control motor (4) rotation after the brake signal of brake pedal (7), by slowing down
Transmission mechanism (5) pushes the push rod of master cylinder (12) to make braking system construction in a systematic way pressure, and the corresponding normally open solenoid valve of each wheel cylinder is beaten
It opens, each wheel cylinder generates brake force, and ECU (1) control Failure Control valve makes pedal sense simulator (13) and fluid reservoir (6) phase
It is logical, and secondary master cylinder (9) are closed, thus pedal sense simulator (13) is felt；
(2) when motor (4) fail, Failure Control solenoid valve makes secondary master cylinder (9), adjustment mechanism (10) (10) and decoupling cylinder
(11) it is equivalent to be rigidly connected, master cylinder (12) decompression will be pushed directly on by, which stepping on after brake pedal (7), builds pressure, each wheel cylinder
Brake force is generated, hydraulic pump (36) is pressurized as back-up power source auxiliary braking master cylinder (12).
8. a kind of electronic hydraulic brake system of dual power source hydraulic failure backup according to claim 7, feature exist
In, in system operation, the hydraulic coupling control of each wheel cylinder of each wheel cylinder and rear-wheel of front-wheel is independent control,
Specifically includes the following steps:
1) brake pedal (7), ECU (1) obtain the demand braking force of each wheel cylinder；
2) motor (4) rotates, and adjusts the hydraulic coupling of master cylinder (12)；
3) demand braking force of ECU (1) each wheel cylinder is carried out independent by hydraulic coupling of the control solenoid valve to each wheel cylinder
It adjusts；
4) it is inverted by motor (4) so that master cylinder (12) pressure release, is run by hydraulic pump (36) so that low pressure accumulator
(34) pressure release.
9. a kind of electronic hydraulic brake system of dual power source hydraulic failure backup according to claim 8, feature exist
In in step 3), when front-wheel branch is using master cylinder (12) decompression, left rear wheel wheel cylinder branch (27), off hind wheel wheel cylinder branch
(28) when being equipped with auxiliary power resource loop between, which adjusts the concrete principle of pressure are as follows:
When front-wheel needs to be pressurized, the rotating forward that ECU (1) controls motor (4) pushes the push rod of master cylinder (12) to realize that system increases
Pressure, the first normally open solenoid valve (15), the second normally open solenoid valve (16) power-off, front-wheel hydraulic coupling improve；When front-wheel needs to depressurize,
ECU (1), which controls motor (4) reversion, reduces the system hydraulic coupling of master cylinder (12), the first normally open solenoid valve (15), second normally opened
Solenoid valve (16) power-off, front-wheel hydraulic coupling reduce；When front-wheel needs pressure maintaining, the first normally open solenoid valve (15), the second normally opened electricity
Magnet valve (16) is powered, and closing front wheel brake circuit makes front-wheel pressure maintaining；
When rear-wheel needs to be pressurized, the rotating forward that ECU (1) controls motor (4) pushes the push rod of master cylinder (12) to realize that system increases
Pressure, third normally open solenoid valve (17), the power-off of the 4th normally open solenoid valve (18), rear-wheel hydraulic coupling improve；When rear-wheel needs to depressurize,
The normally open solenoid valve power-off for the correspondence wheel cylinder for needing to depressurize is opened, normally closed solenoid valve is powered and opens, and is passed through low pressure accumulator (34)
Left rear wheel wheel cylinder (27) or off hind wheel wheel cylinder (28) fast decompression is assisted with hydraulic pump (36)；When rear-wheel needs pressure maintaining
When, third normally open solenoid valve (17), the 4th normally open solenoid valve (18) are powered, the first normally closed solenoid valve (19), the second normally closed electromagnetism
Valve (20) power-off, closing rear service brake circuit makes rear-wheel wheel cylinder pressure maintaining；
When front-wheel needs to be pressurized, rear-wheel needs to depressurize, the rotating forward of ECU (1) control motor (4) pushes pushing away for master cylinder (12)
Bar realizes system boost, and the first normally open solenoid valve (15), the second normally open solenoid valve (16) power-off are opened, so that front-wheel hydraulic coupling mentions
Height, the normally open solenoid valve energization for the correspondence wheel cylinder for needing to depressurize is closed, normally closed solenoid valve is powered and opens, and passes through low pressure accumulator
(34) left rear wheel wheel cylinder (27) or off hind wheel wheel cylinder (28) are depressurized；
When front-wheel needs to depressurize, rear-wheel needs to be pressurized, ECU (1) controls the system that motor (4) reversion reduces master cylinder (12)
Hydraulic coupling, the first normally open solenoid valve (15), the second normally open solenoid valve (16) power-off are opened, and front-wheel hydraulic coupling reduces, and third is normally opened
Solenoid valve (17), the 4th normally open solenoid valve (18), which are powered, closes, rear-wheel pressure maintaining；When front-wheel meets decompression demand, first is normally opened
Solenoid valve (15), the second normally open solenoid valve (16), which are powered, closes, and front-wheel pressure maintaining, the rotating forward that ECU (1) controls motor (4) pushes system
The push rod of dynamic master cylinder (12) realizes system boost, and third normally open solenoid valve (17), the power-off of the 4th normally open solenoid valve (18) are opened, after
Hydraulic coupling is taken turns to improve.
10. a kind of electronic hydraulic brake system of dual power source hydraulic failure backup according to claim 8, feature exist
In in step 3), when rear-wheel branch is using master cylinder (12) decompression, the near front wheel wheel cylinder branch (25), off-front wheel wheel cylinder branch
(26) when being equipped with auxiliary power resource loop between, which adjusts the concrete principle of pressure are as follows:
When rear-wheel needs to be pressurized, the rotating forward that ECU (1) controls motor (4) pushes the push rod of master cylinder (12) to realize that system increases
Pressure, third normally open solenoid valve (17), the power-off of the 4th normally open solenoid valve (18), rear-wheel hydraulic coupling improve；When rear-wheel needs to depressurize,
ECU (1), which controls motor (4) reversion, reduces the system hydraulic coupling of master cylinder (12), third normally open solenoid valve (17), the 4th normally opened
Solenoid valve (18) power-off, rear-wheel hydraulic coupling reduce；When rear-wheel needs pressure maintaining, third normally open solenoid valve (17), the 4th normally opened electricity
Magnet valve (18) is powered, and closing rear service brake circuit makes rear-wheel pressure maintaining；
When front-wheel needs to be pressurized, the rotating forward that ECU (1) controls motor (4) pushes the push rod of master cylinder (12) to realize that system increases
Pressure, the first normally open solenoid valve (15), the second normally open solenoid valve (16) power-off, front-wheel hydraulic coupling improve；When front-wheel needs to depressurize,
The normally open solenoid valve power-off for the correspondence wheel cylinder for needing to depressurize is opened, normally closed solenoid valve is powered and opens, and is passed through low pressure accumulator (34)
The near front wheel wheel cylinder (25) or off-front wheel wheel cylinder (26) fast decompression is assisted with hydraulic pump (36)；When front-wheel needs pressure maintaining
When, the first normally open solenoid valve (15), the second normally open solenoid valve (16) are powered, third normally closed solenoid valve (37), the 4th normally closed electromagnetism
Valve (38) power-off, closing front wheel brake circuit makes front-wheel wheel cylinder pressure maintaining；
When rear-wheel needs to be pressurized, front-wheel needs to depressurize, the rotating forward of ECU (1) control motor (4) pushes pushing away for master cylinder (12)
Bar realizes system boost, and third normally open solenoid valve (17), the power-off of the 4th normally open solenoid valve (18) are opened, so that rear-wheel hydraulic coupling mentions
Height, the normally open solenoid valve energization for the correspondence wheel cylinder for needing to depressurize is closed, normally closed solenoid valve is powered and opens, and passes through low pressure accumulator
(34) the near front wheel wheel cylinder (25) or off-front wheel wheel cylinder (26) are depressurized；
When rear-wheel needs to depressurize, front-wheel needs to be pressurized, ECU (1) controls the system that motor (4) reversion reduces master cylinder (12)
Hydraulic coupling, third normally open solenoid valve (17), the power-off of the 4th normally open solenoid valve (18) are opened, and front-wheel hydraulic coupling reduces, and first is normally opened
Solenoid valve (15), the second normally open solenoid valve (16), which are powered, closes, front-wheel pressure maintaining；When rear-wheel meets decompression demand, third is normally opened
Solenoid valve (17), the 4th normally open solenoid valve (18), which are powered, closes, and rear-wheel pressure maintaining, the rotating forward that ECU (1) controls motor (4) pushes system
The push rod of dynamic master cylinder (12) realizes system boost, and the first normally open solenoid valve (15), the second normally open solenoid valve (16) power-off are opened, preceding
Hydraulic coupling is taken turns to improve.
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| CN201811005842.0A CN109204262A (en) | 2018-08-30 | 2018-08-30 | A kind of electronic hydraulic brake system of dual power source hydraulic failure backup |
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| CN201811005842.0A CN109204262A (en) | 2018-08-30 | 2018-08-30 | A kind of electronic hydraulic brake system of dual power source hydraulic failure backup |
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| CN111824103A (en) * | 2019-04-18 | 2020-10-27 | 现代摩比斯株式会社 | Electronic hydraulic brake device |
| CN112744201A (en) * | 2019-10-31 | 2021-05-04 | 比亚迪股份有限公司 | Electro-hydraulic brake system, method applied to electro-hydraulic brake system and vehicle |
| CN114194158A (en) * | 2021-12-16 | 2022-03-18 | 吉林大学 | Active brake wheel cylinder pressure control method based on integrated electro-hydraulic brake system |
| EP3971044A1 (en) * | 2020-09-17 | 2022-03-23 | Kabushiki Kaisha Toyota Jidoshokki | Automatic brake device for industrial vehicle and industrial vehicle having the same |
| CN114379521A (en) * | 2020-10-22 | 2022-04-22 | 大陆泰密克汽车系统（上海）有限公司 | Brake system, vehicle, and control method for brake system |
| CN115095618A (en) * | 2022-06-27 | 2022-09-23 | 浙江师范大学 | Composite line control brake, brake system and control method |
| WO2023272667A1 (en) * | 2021-06-30 | 2023-01-05 | 华为技术有限公司 | Brake-by-wire system and control method |
| DE102022123562A1 (en) | 2022-06-13 | 2023-12-14 | Hyundai Mobis Co., Ltd. | Electro-hydraulic braking device |
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| CN115095618B (en) * | 2022-06-27 | 2023-07-28 | 浙江师范大学 | Combined type brake-by-wire, brake system and control method |
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