CN104097623A - Vehicle integrated electro-hydraulic braking system - Google Patents
Vehicle integrated electro-hydraulic braking system Download PDFInfo
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- CN104097623A CN104097623A CN201410382240.2A CN201410382240A CN104097623A CN 104097623 A CN104097623 A CN 104097623A CN 201410382240 A CN201410382240 A CN 201410382240A CN 104097623 A CN104097623 A CN 104097623A
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Abstract
The invention relates to a vehicle integrated electro-hydraulic braking system which is composed of a brake pedal, a brake main cylinder, an electric brake power assisting device of the brake main cylinder, a pedal travel simulator, a hydraulic control unit, a brake wheel cylinder and a brake pipeline. The electric brake power assisting device and manpower act on an ejection rod of a brake main cylinder piston independently or in an overlaying mode to push the brake main cylinder piston to conduct braking. The system can work in a power assisting braking mode, a driving braking mode, a regeneration auxiliary braking mode and a manpower backup braking mode according to different braking requirements. The brake main cylinder is connected with the hydraulic control unit through two normally open isolation valves and is connected with the pedal travel simulator through a normally used simulator valve. When an automobile requires regeneration braking, the brake main cylinder and the hydraulic control unit are isolated through the isolation valves, the brake main cylinder is communicated with the pedal travel simulator through the simulator valve, and the pedal travel simulator provides the feel of the brake pedal.
Description
Technical field
The present invention is a kind of vehicle integrated electric hydraulic brake system, specifically, is the novel braking system of a kind of integration electric brake boost braking, initiatively braking, regenerative brake and manpower backup braking function.
Background technology
Along with the continuous progress of science and technology and the raising of people's living standard, safe, the energy-conservation and environmental-protecting performance of automobile is paid close attention to more and more widely, and brake system of car is one of automobile active safety main direction of studying.Yet for the conventional hydraulic brake system that accounts for the manned vehicle of total vehicle 80% and other light-duty vehicle and adopt, its structure has seriously restricted the utilization of braking energy recovery technology of electronization, intellectuality and the new-energy automobile of automobile.
Conventional hydraulic brake system has three obviously deficiencies: the one, can not implement easily initiatively braking (so-called " initiatively braking ", refer in the situation that chaufeur is not stepped on brake pedal, still can realize the braking to all or part of wheel), therefore be difficult to meet the active braking requirement of the chassis active control systems such as adaptive cruise control and electronic stability program; The 2nd, as long as chaufeur is stepped on brake pedal, friction brake starts working and consumed energy, thereby has seriously hindered the braking energy of the new-energy automobiles such as electronlmobil and hybrid vehicle to reclaim; The 3rd, traditional hydraulic brake system is vacuum servo, and on new-energy automobile, there is no vacuum source, need to separately establish the functional requirement that vacuum source could meet system, causes complex structure, cost high.
Meanwhile, people constantly improve the requirement of automobile brake perfrmance, and the function of various advanced persons and hommization (as anti-skid brake system, anti-slip regulation and electronic stabilizing control system etc.) constantly proposes new requirement to brake system.Function additional in brake system is more, and it is more complicated that the structure of brake system just becomes, and has also increased its cost and has reduced its reliability.Therefore developing the integrated brake system that more compact structure, reliable operation and cost performance are higher is trend of the times.
Summary of the invention
For the problems referred to above, the present invention proposes a kind of vehicle integrated electric hydraulic brake system, can work in the various modes such as electrodynamic braking power brake, initiatively braking, regenerative brake and manpower backup braking.
A kind of vehicle integrated electric of the present invention hydraulic brake system, comprises electrodynamic braking work-saving device, sensor module and brake pedal, pedal stroke simulator, hydraulic control unit.
Described brake pedal is connected with the input end of brake push rod; The mouth of brake push rod is connected with series dual chamber brake master cylinder piston mandril; By manpower, step on brake pedal, the first piston that makes brake push rod drive brake master cylinder piston push rod to promote master brake cylinder travels forward.
Described electrodynamic braking work-saving device is realized the straight-line motion that the torque axis of the rotation output of motor is changed to take-off lever; And then realize in braking procedure, by controlling the rotation of motor, realize brake master cylinder piston push rod promotion master brake cylinder first piston and travel forward.
Described hydraulic control unit comprises disconnecting valve A, disconnecting valve B, suction valve A, suction valve B, pressure charging valve A, pressure charging valve B, pressure charging valve C, pressure charging valve D, reducing valve A, reducing valve B, reducing valve C, reducing valve D, simulator valve, Hydraulic Pump A, Hydraulic Pump B, hydraulic pump motor.
Wherein, the input end of disconnecting valve A, disconnecting valve B is connected with master brake cylinder back cavity, master brake cylinder ante-chamber respectively; The mouth of disconnecting valve A is connected with the input end of pressure charging valve A, pressure charging valve B; The mouth of disconnecting valve B is connected with pressure charging valve C, pressure charging valve D.The mouth of pressure charging valve A, pressure charging valve B, pressure charging valve C, pressure charging valve D is connected with brake wheel cylinder A, brake wheel cylinder B, brake wheel cylinder C, brake wheel cylinder D respectively; The input end of suction valve A, suction valve B is all connected with fluid reservoir by brake piping; The mouth of suction valve A, suction valve B is connected with the input end of drawdown pump A drawdown pump A, Hydraulic Pump B respectively; Hydraulic Pump A is all connected with hydraulic pump motor with Hydraulic Pump B.The mouth of drawdown pump A drawdown pump A is connected with the input end of pressure charging valve A, pressure charging valve B; The mouth of Hydraulic Pump B is connected with the input end of pressure charging valve C, pressure charging valve D.Reducing valve A is connected with the input end of drawdown pump A drawdown pump A respectively with the mouth of reducing valve B, and reducing valve C is connected with the input end of Hydraulic Pump B respectively with the mouth of reducing valve B.The input end of reducing valve A, reducing valve B, reducing valve C, reducing valve D is connected with brake wheel cylinder A, brake wheel cylinder B, brake wheel cylinder C, brake wheel cylinder D respectively; The input end of simulator valve is connected with master brake cylinder ante-chamber, and mouth is connected with pedal stroke simulator.
Described sensor module comprises pedal displacement sensor and master cylinder pressure sensor; Be arranged on respectively on brake pedal and master brake cylinder, be used for obtaining the displacement signal of brake pedal and the pressure signal of master brake cylinder.
By the electronic control unit on vehicle, accept the collection signal of vehicle-mounted control sensor on vehicle and pedal displacement sensor, master cylinder pressure sensor, electrodynamic braking work-saving device and hydraulic control unit are controlled, realize the selection of brake mode, comprise electrodynamic braking power-assisted, regenerative brake and initiatively braking.
Advantage of the present invention is:
1, in vehicle integrated electric hydraulic brake system of the present invention, electrodynamic braking work-saving device is controlled, and the braking force that electrodynamic braking work-saving device provides is adjustable, is not fixing linear relationship with being applied to manpower on master brake cylinder; According to signals such as master cylinder pressure sensor, pedal displacement sensor, car speed sensors and adopt predefined control algorithm to determine the mode of operation of brake system, and regulate and control electrodynamic braking work-saving device;
2, vehicle integrated electric hydraulic brake system of the present invention has electrodynamic braking power-assisted and braking function initiatively simultaneously, and high reliability, the brake pedal feel that has non-line control brake system concurrently can be in harmonious proportion the active braking function of line control brake system;
3, vehicle integrated electric hydraulic brake system of the present invention, because motor participates in adjustable brake pressure, makes that whole system fluctuation of pressure is little, pressure regulation precision is high.
4, vehicle integrated electric hydraulic brake system of the present invention, the reaction tray structure of employing traditional vacuum work-saving device, can obtain better its brake pedal feel, and (i.e. " road feel ") is better than other line control brake system.
5, vehicle integrated electric hydraulic brake system of the present invention, because brake pedal directly pushes away master cylinder, so the reliability of system is higher;
6, vehicle integrated electric hydraulic brake system of the present invention has electrodynamic braking power-assisted and braking function initiatively simultaneously, and high reliability, the brake pedal feel that has non-line control brake system concurrently can be in harmonious proportion the active braking function of line control brake system.
Accompanying drawing explanation
Fig. 1 is vehicle integrated electric hydraulic brake system structured flowchart of the present invention;
Fig. 2 is electrodynamic braking work-saving device structural representation in vehicle integrated electric hydraulic brake system of the present invention.
In figure:
1-pedal displacement sensor 2-brake pedal 3-disconnecting valve A
4-suction valve A 5-hydraulic pump motor 6-Hydraulic Pump A
7-pressure charging valve A 8-pressure charging valve B 9-check valve
10-low pressure accumulator 11-reducing valve A 12-reducing valve B
13-brake wheel cylinder A 14-brake wheel cylinder B 15-brake wheel cylinder C
16-brake wheel cylinder D 17-reducing valve C 18-reducing valve D
19-pressure charging valve C 20-pressure charging valve D 21-Hydraulic Pump B
22-disconnecting valve B 23-suction valve B 24-pedal stroke simulator
25-simulator valve 26-master cylinder pressure sensor 27-master brake cylinder
28-master brake cylinder ante-chamber 29-master brake cylinder back cavity 30-fluid reservoir
31-brake master cylinder piston push rod 32-electrodynamic braking work-saving device 33-hydraulic control unit
34-brake push rod 35-seal ring 36-bearing seat
37-leading screw snap ring 38-angular contact ball bearing 39-rear side housing
40-flat key 41-flange 42-stator
43-rotor 44-leading screw 45-nut
46-key 47-push-plate snap ring 48-reaction tray pushing block
49-reaction block 50-push-plate 51-reaction tray
52-front end cover 54-hydraulic pump motor 55-fireproof brickwork
56-pedal support
The specific embodiment
Below in conjunction with accompanying drawing, the invention will be further described.
Vehicle integrated electric hydraulic brake system of the present invention, comprises electrodynamic braking work-saving device 32, brake pedal 2, pedal stroke simulator 24, hydraulic control unit 33 and sensor module.
Described brake pedal 2 is connected with pedal support 56 by rest pin, and pedal support 56 is connected with fireproof brickwork 55 aft end faces on automobile.Brake pedal 2 is connected with the input end of brake push rod 34 by spherical seat, to prevent that brake pedal 2 push rod vertical directions from moving the impact on brake push rod 34; The mouth of brake push rod 34 is connected with series dual chamber brake master cylinder piston mandril 31.In braking procedure, by manpower, step on brake pedal 2, brake push rod 34 is travelled forward, and then the first piston that makes brake master cylinder piston push rod 31 promote master brake cylinder 27 travel forward.
Described electrodynamic braking work-saving device 32 adopts the electrodynamic braking work-saving device with electromechanical, the torque axis of the rotation output of motor can be changed to the straight-line motion of take-off lever.And then realize in braking procedure, by controlling the rotation of motor, realize brake master cylinder piston push rod 31 promotion master brake cylinder 27 first pistons and travel forward.In the present invention, electrodynamic braking work-saving device 32 adopts following structure to realize:
Electrodynamic braking work-saving device 32 comprises hollow motor, ball screw assembly,, reaction tray pushing block 48, push-plate 50 and reaction tray 51.
Wherein, the front end of hollow motor and rear end are bolted respectively front end cover 52 and rear side housing 39 are installed; Front end cover 52 is fixing by the stator 42 of bolt and hollow motor with rear side housing 39.The sleeve on front end cover 52 with integrative-structure; Rear side housing 39 centers have through hole; And make sleeve and through hole all coaxial with the sleeve rotor 43 of hollow motor and communicate, form delivery channel.On rear side housing 39, be installed with bearing seat 36, angular contact ball bearing 38 is installed in bearing seat 36, the aft end face of angular contact ball bearing 38 coordinates with the shoulder that 36 inwall weeks of bearing seat are upwards designed, and realizes spacing that angular contact ball bearing 38 moves backward.Above-mentioned bearing seat 36 is secured by bolts in fireproof brickwork 55 front sides of auto body; Front end cover 52 ends are connected with master brake cylinder 27 by bolt.
In described ball screw assembly,, leading screw 44 adopts hollow structures, the length of nut 45 on having axially; Hollow lead screw 44 is coaxially arranged in delivery channel with nut 45.Wherein, hollow lead screw 44 rear ends are set with flange 41, and flange 41 is connected by the rotor 43 of bolt and hollow motor, and and angular contact ball bearing 38 front end faces between free-running fit; Meanwhile, flange 41 is connected by flat key 40 and hollow lead screw 44 outer walls, and the moment of torsion of rotor 43 generations of hollow motor can be delivered on nut 45.Hollow lead screw 44 ends, rear end are connected with angular contact ball bearing 38 bearing fits in bearing seat 36, and are upwards designed with half the circumference of the sleeve where it joins the shoulder week and coordinate with angular contact ball bearing 38 inner ring front end faces, realize spacing that hollow lead screw 44 moves backward.Hollow lead screw 44 ends, rear end also fixed cover are connected to leading screw snap ring 37, leading screw snap ring 37 and angular contact ball bearing 38 inner ring aft end face free-running fits; Thus, when hollow lead screw 44 travels forward, leading screw snap ring 37 overcomes the gap between self and angular contact ball bearing 38, with angular contact ball bearing 38 inner ring aft end faces laminatings, promotes angular contact ball bearing 38 and moves forward; Angular contact ball bearing 38 overcomes the gap between self and flange 41, inner ring front end face and flange 41 aft end faces laminatings, and then it is proal spacing to realize hollow lead screw 44.Nut 45 rear ends and flange 41 front end laminatings, realize by flange 41 spacing that nut 45 moves backward; On nut 45 is axial, have groove, by embedding the key 46 of installing in the sleeve lateral wall at front end cover 52, make key 46 and groove fit, be arranged in groove, realize the upwards restriction of rotation of nut 45 footpaths, and the guiding of nut 45 axle upward movements.
Described push-plate 50 is tubular structure, is coaxially arranged in delivery channel, is positioned at nut 45 the place aheads.50 outer wall weeks of push-plate are upwards designed with shoulder A, with nut 45 front end face laminatings; And push-plate 50 is divided into leading portion, stage casing and back segment by the large I of internal diameter from front to back, leading portion and back segment internal diameter are all greater than stage casing internal diameter, make leading portion with in intersegmental formation shoulder B, between stage casing and back segment, form shoulder C.Reaction tray 51 is coaxially arranged on the front intersegmental part of push-plate 50, can in push-plate 50 leading portions, move forward and backward; And cooperatively interact by the shoulder B of reaction tray 51 aft end faces and push-plate 50, it is spacing that realization response dish 51 moves backward.Reaction tray pushing block 48 is the integrative-structure that termination and guide form; The anterior external diameter in termination equates with push-plate 50 stage casing internal diameters, and rear portion, termination external diameter equates with push-plate 50 back segment internal diameters, makes to form shoulder D between front portion, termination and rear portion, termination.In termination, have circular cavity.Guide and termination aft end face join, and are communicated with circular cavity.The front portion, termination of said structure is positioned at push-plate 50 stage casings, and rear portion is arranged in push-plate 50 back segments.Rear portion, termination can move forward and backward in push-plate 50 back segments, and then front portion, termination also can be moved forward and backward in push-plate 50 stage casings.Shoulder D on termination and the shoulder C on push-plate 50 cooperatively interact, and can realize rear portion, termination proal spacing.50 back segment interior extremity weeks of push-plate are upwards provided with push-plate snap ring 47, by push-plate snap ring 47, coordinate with rear portion, termination end face, realize spacing that rear portion, termination moves backward.The end of described brake master cylinder piston push rod 31 has contact surface, is arranged at the front intersegmental part of push-plate 50, contacts with reaction tray 51.
When brake pedal 2 is not stepped on, the termination aft end face of reaction tray pushing block 48 and 47 laminatings of push-plate snap ring, the spacing shoulder B laminating of reaction tray 51 aft end faces and push-plate 50,50 of the termination front end face of reaction tray pushing block 48 and push-plates have gap; Now, the first piston of master cylinder is in initial position.After depressing brake pedal 2, make the termination of brake push rod 34 driving a reaction dish pushing blocks 48, travel forward, after the termination of reaction tray pushing block 48 contacts with reaction tray 51, can travel forward by driving a reaction dish 51, the first piston that finally promotes master brake cylinder 27 by brake master cylinder piston push rod 31 travels forward.Simultaneously, by controlling the rotor 43 of hollow motor, rotate, can drive flange 41 to rotate, the moment of torsion that flange 41 produces the rotor of hollow motor 43 by flat key 40 is delivered to hollow lead screw 44, hollow lead screw 44 is rotated, and then drive nut 45 to travel forward, thereby promote push-plate 50, travel forward.When push-plate 50 travels forward, the spacing shoulder driving a reaction dish 51 by push-plate 50 travels forward, and then travels forward by the first piston that push rod promotes master brake cylinder 27.In the present invention, in push-plate 50 stage casings, be also provided with reaction block 49, reaction block 49 is between reaction tray pushing block 48 and reaction tray 51; Thus, the termination of reaction tray pushing block 48 travels forward, and driving a reaction piece 49 travels forward, and then driving a reaction dish 51 travels forward; Reaction block 49 rear and front end faces are conical suface, thus, can make the termination of reaction block 49 front/rear ends and reaction tray pushing block 48 and reaction tray 51 area of contact increase gradually, brake pedal 2 is trampled and felt better.
Described hydraulic control unit 33 comprises disconnecting valve A3, suction valve A4, hydraulic pump motor 5, Hydraulic Pump A6, pressure charging valve A7, pressure charging valve B8, check valve 9, low pressure accumulator 10, reducing valve A11, reducing valve B12, brake wheel cylinder A13, brake wheel cylinder B14, brake wheel cylinder C15, brake wheel cylinder D16, reducing valve C17, reducing valve D18, pressure charging valve C19, pressure charging valve D20, Hydraulic Pump B21, disconnecting valve B22, suction valve B23, simulator valve 25.
Wherein, the input end of disconnecting valve A3, disconnecting valve B22 is connected with master brake cylinder back cavity 29, master brake cylinder ante-chamber 28 by brake piping respectively; The mouth of disconnecting valve A3 is connected with the input end of pressure charging valve A7, pressure charging valve B8 by brake piping; The mouth of disconnecting valve B22 is connected with pressure charging valve C19, pressure charging valve D20 by brake piping.The mouth of pressure charging valve A7, pressure charging valve B8, pressure charging valve C19, pressure charging valve D20 is connected with brake wheel cylinder A13, brake wheel cylinder B14, brake wheel cylinder C15, brake wheel cylinder D16 by brake piping respectively; And pressure charging valve A7, pressure charging valve B8, pressure charging valve C19, pressure charging valve D20 are all parallel with check valve 9 by brake piping.The input end of suction valve A4, suction valve B23 is all connected with fluid reservoir 30 by brake piping.The mouth of suction valve A4, suction valve B23 is connected with the input end of drawdown pump A6, Hydraulic Pump B21 by brake piping respectively; Hydraulic Pump A6 is all connected with hydraulic pump motor 5 with Hydraulic Pump B, by hydraulic pump motor 5 drive work.The mouth of drawdown pump A6 is connected with the input end of pressure charging valve A7, pressure charging valve B8 by brake piping; The mouth of Hydraulic Pump B21 is connected with the input end of pressure charging valve C19, pressure charging valve D20 by brake piping.Reducing valve A11 is connected with the input end of drawdown pump A6 by brake piping respectively with the mouth of reducing valve B12, and reducing valve C17 is connected with the input end of Hydraulic Pump B21 by brake piping respectively with the mouth of reducing valve B12.The input end of reducing valve A11, reducing valve B12, reducing valve C17, reducing valve D18 is connected with brake wheel cylinder A13, brake wheel cylinder B14, brake wheel cylinder C15, brake wheel cylinder D16 by brake piping respectively.Mouth at reducing valve A11, reducing valve B12, reducing valve C17, reducing valve D18 is also provided with decompression accumulator.The input end of simulator valve 25 is connected with master brake cylinder ante-chamber 28, and mouth is connected with pedal stroke simulator 24.
Described sensor module comprises pedal displacement sensor 1 and master cylinder pressure sensor 26; Be arranged on respectively on brake pedal 2 and master brake cylinder 27, be used for obtaining the displacement signal of brake pedal 2 and the pressure signal of master brake cylinder 27; By the electronic control unit on vehicle, accept thus the collection signal of vehicle-mounted control sensor (as wheel speed sensors, pressure of wheel braking cylinder sensor) on existing vehicle and pedal displacement sensor 1, master cylinder pressure sensor 26, electrodynamic braking work-saving device and hydraulic control unit 33 are controlled, realize the selection of Electro-hydraulic brake Braking system pattern of the present invention, comprise electrodynamic braking assistant mode, regenerative brake pattern and active braking mode.Below each mode of operation working process is described:
Electrodynamic braking assistant mode:
Electrodynamic braking assistant mode is as the normal mode of operation of Electro-hydraulic brake system of the present invention, can be used for not having the automobile of regeneration brake system and active brake system, the displacement signal of the brake pedal 2 that electronic control unit only gathers according to pedal displacement sensor 1, brake pedal 2 is trampled to state to be detected, when brake pedal 2 being detected and be operated, electronic control unit is selected electrodynamic braking assistant mode.Under electrodynamic braking assistant mode, manpower depresses after brake pedal 2, brake push rod 34 driving a reaction dish pushing blocks 48, reaction tray pushing block 48 driving a reaction pieces 49, reaction block 49 is driving a reaction dish 51 again, reaction tray 51 promotes brake master cylinder piston push rod 31, and then the first piston of promotion master brake cylinder 27 travels forward; When manpower depresses brake pedal 2, electronic control unit is also according to the displacement signal of the brake pedal 2 of pedal displacement sensor 1 Real-time Collection, according to assist characteristic curve, draw the power torque of hollow motor, thus, make the sleeve rotor 43 output torques of hollow motor and be passed to leading screw 44, and then driving nut 45 to travel forward, applying power-assisted promotion push-plate 50 and travel forward, and then driving reaction tray 51, push rod 52 to travel forward, the first piston that promotes master brake cylinder 27 travels forward.In manpower and 32 combineds action of electrodynamic braking work-saving device in the first piston of master brake cylinder 27, braking liquid in master brake cylinder 27 passes through after disconnecting valve A3 and disconnecting valve B22, through pressure charging valve A7, pressure charging valve B8 and pressure charging valve C19, pressure charging valve D20, export four brake wheel cylinders to respectively again, in brake wheel cylinder, set up brake-pressure.In continuing braking procedure, when there is locking trend in any wheel, electronic control unit is according to the wheel speed signal receiving, the wheel of judgement locking, and control in pressure charging valve A7, pressure charging valve B8, pressure charging valve C19, pressure charging valve D20 one or a plurality of energising disconnects, while correspondence controls in reducing valve A11, reducing valve B12, reducing valve C17, reducing valve D18 or a plurality of energising closure reduces pressure, and the braking liquid in brake wheel cylinder is back in master cylinder through reducing valve and disconnecting valve successively.In decompression process, by low pressure accumulator 10, accelerate decompression rate.Also can carry out auxiliary adjustment by adjusting the rotor 43 torques outputs of the hollow motor of electrodynamic braking servo-unit, now, the braking liquid in brake wheel cylinder is after reducing valve check valve 9 in parallel, then in disconnecting valve is back to master cylinder.The assist characteristic curve that consequently makes electrodynamic braking servo-unit adapts with the coefficient of road adhesion identifying, and low, adheres under operating mode that electrodynamic braking power-assisted is less, at height, to adhere under operating mode electrodynamic braking power-assisted larger.Another benefit that electromechanical electrodynamic braking work-saving device brings is, the pressure signal of the master brake cylinder 27 recording according to master cylinder pressure sensor 26, can export time compression shock of liquid to reaction tray 51 that an additional torque suppresses wheel cylinder, thereby realize good brake pedal 2 sensations.
Regenerative brake pattern:
Regenerative brake pattern can be used for having the automobile of regeneration brake system, when electronic control unit 34 detects brake pedal 2 and is operated, further by the electrical quantity sensor in vehicle-mounted control sensor, the closed-center system of energy source of car system (as battery) is detected, when closed-center system allows energy storage (i.e. charging concerning battery), and the braking deceleration that only relies on regenerative brake to produce is enough to produce in the situation of desired braking deceleration, electronic control unit is selected regenerative brake pattern, and friction braking is not worked.When carrying out regenerative brake, disconnecting valve A3 and disconnecting valve B22 energising disconnects, 25 energisings of simulator valve are closed, and the braking liquid of master brake cylinder ante-chamber 28 exports pedal stroke simulator 24 to by simulator valve 25, and build-up pressure therein, and friction braking is not worked; In the situation that regenerative brake motor is not enough to produce desired braking deceleration, need to provide extra friction brake force, the parallel schema that electronic control unit also can select friction braking and regenerative brake to work simultaneously; Now, disconnecting valve A3 and disconnecting valve B22 energising disconnect, 25 energisings of simulator valve are closed, suction valve A4 and suction valve B23 energising are closed, and control hydraulic pump motor 5 and work, drive Hydraulic Pump A6, Hydraulic Pump B21 the braking liquid in fluid reservoir 30 to be pumped into each brake wheel cylinder by pressure charging valve A7, pressure charging valve B8, pressure charging valve C19 and pressure charging valve B8, build-up pressure in brake wheel cylinder.When vehicle integrated electric hydraulic brake system of the present invention works in assisted Regeneration braking mode, brake pedal 2 sensations are provided by pedal stroke simulator 24.
Active braking mode:
Initiatively braking mode can be used for being equipped with the initiatively automobile of brake system, if detecting vehicle, electronic control unit 34 has initiatively braking requirement, select initiatively braking mode, as: it is excessively near that electronic control unit detects vehicle distances obstacle by the wheel speed sensors in vehicle-mounted control sensor and distance measuring sensor, and lasting current vehicle speed is travelled in the time of can bumping, electronic control unit is selected initiatively braking mode.Under active braking mode, electronic control unit is controlled hollow motor output torque and is made master brake cylinder ante-chamber 28 and the interior build-up pressure of master brake cylinder back cavity 29, and by hydraulic control unit 33, select whole wheels or part wheel to implement braking, and adjust where necessary each wheel cylinder 32 brake-pressures.
When the control unit of vehicle integrated electric hydraulic brake system of the present invention, operating mechanism or sensor et out of order, system still can provide existing, The cream of the crop function.For example: when hydraulic pump motor 54 et out of order, by hydraulic pump motor 54, carry out pressure controlled afunction, but still can carry out conventional brake.And for example, when electrodynamic braking work-saving device 32 et out of orders are even during whole system power-fail, chaufeur is stepped on brake pedal 2 and still can be produced braking force and be arrived master cylinder back cavity 29 through brake master cylinder piston push rod 31 by brake push rod 34, thereby realizes manpower backup braking.
Claims (4)
1. a vehicle integrated electric hydraulic brake system, is characterized in that: comprise electrodynamic braking work-saving device, sensor module and brake pedal, pedal stroke simulator, hydraulic control unit;
Described brake pedal is connected with the input end of brake push rod; The mouth of brake push rod is connected with series dual chamber brake master cylinder piston mandril; By manpower, step on brake pedal, the first piston that makes brake push rod drive brake master cylinder piston push rod to promote master brake cylinder travels forward;
Described electrodynamic braking work-saving device is realized the straight-line motion that the torque axis of the rotation output of motor is changed to take-off lever; And then realize in braking procedure, by controlling the rotation of motor, realize brake master cylinder piston push rod promotion master brake cylinder first piston and travel forward;
Described hydraulic control unit comprises disconnecting valve A, disconnecting valve B, suction valve A, suction valve B, pressure charging valve A, pressure charging valve B, pressure charging valve C, pressure charging valve D, reducing valve A, reducing valve B, reducing valve C, reducing valve D, simulator valve, Hydraulic Pump A, Hydraulic Pump B, hydraulic pump motor;
Wherein, the input end of disconnecting valve A, disconnecting valve B is connected with master brake cylinder back cavity, master brake cylinder ante-chamber respectively; The mouth of disconnecting valve A is connected with the input end of pressure charging valve A, pressure charging valve B; The mouth of disconnecting valve B is connected with pressure charging valve C, pressure charging valve D; The mouth of pressure charging valve A, pressure charging valve B, pressure charging valve C, pressure charging valve D is connected with brake wheel cylinder A, brake wheel cylinder B, brake wheel cylinder C, brake wheel cylinder D respectively; The input end of suction valve A, suction valve B is all connected with fluid reservoir by brake piping; The mouth of suction valve A, suction valve B is connected with the input end of drawdown pump A, Hydraulic Pump B respectively; Hydraulic Pump A is all connected with hydraulic pump motor with Hydraulic Pump B; The mouth of drawdown pump A is connected with the input end of pressure charging valve A, pressure charging valve B; The mouth of Hydraulic Pump B is connected with the input end of pressure charging valve C, pressure charging valve D; Reducing valve A is connected with the input end of drawdown pump A respectively with the mouth of reducing valve B, and reducing valve C is connected with the input end of Hydraulic Pump B respectively with the mouth of reducing valve B; The input end of reducing valve A, reducing valve B, reducing valve C, reducing valve D is connected with brake wheel cylinder A, brake wheel cylinder B, brake wheel cylinder C, brake wheel cylinder D respectively; The input end of simulator valve is connected with master brake cylinder ante-chamber, and mouth is connected with pedal stroke simulator;
Described sensor module comprises pedal displacement sensor and master cylinder pressure sensor; Be arranged on respectively on brake pedal and master brake cylinder, be used for obtaining the displacement signal of brake pedal and the pressure signal of master brake cylinder.
2. a kind of vehicle integrated electric hydraulic brake system as claimed in claim 1, is characterized in that: the described mouth at reducing valve A, reducing valve B, reducing valve C, reducing valve D is also provided with decompression accumulator.
3. a kind of vehicle integrated electric hydraulic brake system as claimed in claim 1, is characterized in that: described pressure charging valve A, pressure charging valve B, pressure charging valve C, pressure charging valve D are all parallel with check valve.
4. a kind of vehicle integrated electric hydraulic brake system as claimed in claim 1, it is characterized in that: the collection signal of accepting vehicle-mounted control sensor on vehicle and pedal displacement sensor, master cylinder pressure sensor by the electronic control unit on vehicle, electrodynamic braking work-saving device and hydraulic control unit are controlled, realize the selection of brake mode, comprise electrodynamic braking power-assisted, regenerative brake and initiatively braking.
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| CN201410382240.2A CN104097623B (en) | 2014-08-06 | 2014-08-06 | A kind of integrated electro-hydraulic brake system of vehicle |
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| CN201410382240.2A CN104097623B (en) | 2014-08-06 | 2014-08-06 | A kind of integrated electro-hydraulic brake system of vehicle |
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| CN104097623B CN104097623B (en) | 2016-08-31 |
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| CN104442769A (en) * | 2014-11-03 | 2015-03-25 | 浙江万向精工有限公司 | Brake-by-wire system with pedal feedback force isolation function and isolation control method |
| CN104802785A (en) * | 2015-04-09 | 2015-07-29 | 奇瑞汽车股份有限公司 | Control system for automobile brake energy recovery |
| CN106184173A (en) * | 2015-05-29 | 2016-12-07 | 现代自动车株式会社 | EHB and the method for controlling this system |
| CN106696938A (en) * | 2016-12-15 | 2017-05-24 | 吉林大学 | Decoupling type electric power-assisted braking system based on X-type arrangement |
| CN107244316A (en) * | 2017-05-11 | 2017-10-13 | 浙江零跑科技有限公司 | Vehicle Braking mode supercharging accumulator |
| CN109131289A (en) * | 2017-06-27 | 2019-01-04 | 现代摩比斯株式会社 | The braking equipment and brake control method of vehicle |
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| CN107244316B (en) * | 2017-05-11 | 2019-07-23 | 浙江零跑科技有限公司 | Vehicle automatic braking supercharging accumulator |
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| CN109131289A (en) * | 2017-06-27 | 2019-01-04 | 现代摩比斯株式会社 | The braking equipment and brake control method of vehicle |
| CN109131289B (en) * | 2017-06-27 | 2021-02-12 | 现代摩比斯株式会社 | Brake apparatus and brake control method for vehicle |
| CN111547029A (en) * | 2019-02-12 | 2020-08-18 | 大陆-特韦斯贸易合伙股份公司及两合公司 | Brake system and associated operating method |
| CN112519743A (en) * | 2019-09-18 | 2021-03-19 | 现代摩比斯株式会社 | Brake apparatus using electric booster and control method thereof |
| US11724680B2 (en) | 2019-09-18 | 2023-08-15 | Hyundai Mobis Co., Ltd. | Apparatus for braking using electric booster and control method thereof |
| CN112776769A (en) * | 2019-11-08 | 2021-05-11 | 比亚迪股份有限公司 | Vehicle brake system and control method thereof |
| CN112776769B (en) * | 2019-11-08 | 2022-11-11 | 比亚迪股份有限公司 | Vehicle brake system and control method thereof |
| CN111086495A (en) * | 2020-03-13 | 2020-05-01 | 天津英创汇智汽车技术有限公司 | Electronic hydraulic brake power-assisted system |
| CN112622854A (en) * | 2020-11-06 | 2021-04-09 | 宁波拓普集团股份有限公司 | Decoupling intelligent braking system and braking torque control method thereof |
| CN113147704A (en) * | 2021-05-28 | 2021-07-23 | 南京经纬达汽车科技有限公司 | Vehicle brake-by-wire system and braking method thereof |
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Effective date of registration: 20190103 Address after: 211200 288 Qinhuai Road, Yung Yang Street, Lishui District, Nanjing, Jiangsu Patentee after: Nanjing Jingweida Automobile Technology Co., Ltd. Address before: 130022 State Key Laboratory of Automobile Simulation and Control, Jilin University, 5988 Renmin Street, Changchun City, Jilin Province Co-patentee before: Ding Nenggen Patentee before: Deng Weiwen |