CN104442783A - Initiative brakeage regulating system with failure backup of motor drive liquid chamber - Google Patents
Initiative brakeage regulating system with failure backup of motor drive liquid chamber Download PDFInfo
- Publication number
- CN104442783A CN104442783A CN201310428844.1A CN201310428844A CN104442783A CN 104442783 A CN104442783 A CN 104442783A CN 201310428844 A CN201310428844 A CN 201310428844A CN 104442783 A CN104442783 A CN 104442783A
- Authority
- CN
- China
- Prior art keywords
- piston
- brake
- simulator
- chamber
- hydraulic cavities
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
- B60T13/74—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with electrical assistance or drive
- B60T13/745—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with electrical assistance or drive acting on a hydraulic system, e.g. a master cylinder
-
- 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
- B60T13/12—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 the fluid being liquid
- B60T13/14—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 the fluid being liquid using accumulators or reservoirs fed by pumps
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T7/00—Brake-action initiating means
- B60T7/02—Brake-action initiating means for personal initiation
- B60T7/04—Brake-action initiating means for personal initiation foot actuated
- B60T7/06—Disposition of pedal
Landscapes
- Engineering & Computer Science (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Regulating Braking Force (AREA)
Abstract
The invention belongs to the technical field of automobile brake, particularly relates to an initiative brakeage regulating system with failure backup of a motor drive liquid chamber. The purpose of the system is to supply a system with compact structure, convenient arrangement, easy failure backup and multiple functions. The system comprises a brake outer shell (27), a motor (2), a hydraulic source, a solenoid valve and a brake cylinder (28). The system is characterized by further comprising a brake pedal simulator and a motion converting mechanism. A vacuum booster is canceled and the total body mass is effectively decreased. The initiative brakeage regulating system with failure backup of a motor drive liquid chamber is compact in structure and easy to arrange. The motor is adopted as a power source, an outside nut integrated with a motor rotor, a ball helical pair composed of a liquid chamber (4) and a motion converting mechanism composed of a liquid chamber piston (5), that is machinery connect with electric is adopted, and response of brake is quick. By the application of the brake pedal simulator, a coordinated piston rod (22) and a piston fixing rod (23), the brake backup of a brake machinery structure is achieved and security of driving is guaranteed.
Description
Technical field
The invention belongs to automobile brake technical field, be specifically related to a kind of initiative brake control system with the motor driven liquid pressure chamber of backup of losing efficacy.
Background technology
On modern automobile, widely used hydraulic brake system comprises brake pedal, vacuum booster, master brake cylinder, hydraulic tubing, brake wheel cylinder, and a few part composition such as electromagnetic valve, although Conventional braking systems has become a very proven technique.But this system also exists some problems: such as mechanical part is more, hydraulic tubing is complicated, and vacuum booster volume ratio is comparatively large, and especially after integrated electric control function, system is more complicated, arranges that assembly difficulty is large.Tackling instantly complicated environment institute problems faced for Conventional braking systems, many researchists explore the development of following brake system, try hard to break through the deficiency on conventional confguration.
Along with the progress of science and technology, line control brake system is more and more subject to the favor of people.As mechanical type brake system electric (EMB) adopts motor as brake actuator, eliminate traditional hydraulic brake line, there is response fast, the simple feature of structure.EHB (EHB) provides elevated pressurization by energy storage, and high-speed switch electromagnetic valve controls pressure of wheel braking cylinder, remains hydraulic tubing, has response fast, the feature that reliability is high.But EMB is owing to have employed a large amount of electronicies package in system, the backup therefore when braking failure is too complicated, high cost; EHB directly controls pressure of wheel braking cylinder due to it, and the electromagnetic valve quantity of application is too much, and hydraulic tubing is too cumbersome, makes system too numerous and jumbled.
Summary of the invention
The object of this invention is to provide a kind of compact conformation, arrangement convenience, inefficacy backup is simple and there is the multi-functional initiative brake control system with the motor driven liquid pressure chamber of backup of losing efficacy.
The present invention is achieved in that
Having lost efficacy backup motor driven liquid pressure chamber an initiative brake control system, comprise brake shell body, motor, hydraulic power source, electromagnetic valve and wheel cylinder, it also comprise brake pedal simulator and movement conversion mechanism; Wherein, brake shell body is cylindric, is connected with brake pedal simulator; Motor is connected with electronic control unit and movement conversion mechanism respectively, rotates under the control of electronic control unit, for movement conversion mechanism provides power; The convert rotational motion of motor is straight-line motion by movement conversion mechanism; Brake pedal simulator is arranged on movement conversion mechanism front end, for simulating brake sensation and the braking intention obtaining chaufeur, when motor failure, realizes wheel braking; Hydraulic power source is connected with movement conversion mechanism, reveals for compensating hydraulic pressure; Brake wheel cylinder totally four, four brake wheel cylinders are connected with movement conversion mechanism respectively by electromagnetic valve, under the control of electronic control unit, provide power for wheel realizes braking.
Brake pedal simulator as above comprises brake pedal, pedal push rod, simulator end face, sleeve, simulator stub axle, simulator housing, damping element, pedal displacement sensor and pedal simulator damping spring; Brake pedal is connected with the front end of pedal push rod, tramples the motion of lower drive pedal push rod at chaufeur; Simulator end face is discoid, and center has through hole, is fixedly connected with the front end of sleeve; Sleeve is cylindric, and front end surface has taper hole, is provided with snap ring outside middle part, and the front end of snap ring withstands on in the front inner wall of simulator housing, has blind hole as simulator stub axle mounting hole at the middle part of back segment; The rear end of pedal push rod is connected with the front end of sleeve through the through hole in the middle part of simulator end face; Simulator housing is the cylindrical shape of both ends open, and the size of rear and front end opening is consistent with the external diameter of sleeve and the external diameter of simulator stub shaft rear end respectively, and rear end has tapped bore as lockup piston left end stock mounting hole; Simulator stub axle is cylinder, front portion is arranged in the through hole in the middle part of sleeve, rear end external diameter is compared with the little 3 ~ 5mm of simulator stub axle base portion external diameter, rear end is arranged in the opening that simulator housing is rear end, has circular groove as damping element mounting hole in the center of simulator stub shaft rear end end face; Pedal simulator damping spring is sleeved on outside sleeve and simulator stub axle, and front end withstands on the rear end end face of sleeve snap ring, and it is on the inwall of rear end that rear end withstands on simulator housing, for chaufeur braking provides antagonistic force to simulate the brake feel of traditional vehicle; The pedal displacement sensor of brake pedal simulator is connected with the lever of brake pedal by support, and to be fixedly mounted on simulator housing be on bottom end face; Damping element is arranged in the damping element mounting hole of simulator stub shaft rear end, corresponding with piston push rod installation site.
Movement conversion mechanism as above comprises ball spiral pair and hydraulic cavities piston, and hydraulic cavities piston is arranged on ball spiral pair inside; Wherein, ball spiral pair comprises hydraulic cavities and outer nut; Wherein, hydraulic cavities is ball screw hollow structure, the cavity volume of processing diameter 20mm, length 50mm in screw rod, and cavity volume inner structure is consistent with traditional plunger-type brake master cylinder cavity volume, comprises ante-chamber and back cavity; In the middle part of hydraulic cavities, outside has plug helix as outer nut mounting groove; Have two grooves in the both sides up and down of hydraulic cavities afterbody and make pre-tightening mechanism mounting hole; Outer nut is sleeved in the outer nut mounting groove of hydraulic cavities, coordinates realize ball spiral pair with hydraulic cavities.
Motor as above is hollow structure, is sleeved on outside outer nut, and rotor and outer nut become one, and the moment of torsion of motor and dynamic response mate the demand of whole brake system.
Hydraulic cavities piston as above is universal piston structure, is arranged in hydraulic cavities, and installs with hydraulic cavities matching internal, and its one end is connected with piston fixed link by attachment pegs, the movement of restriction hydraulic cavities.
Hydraulic cavities piston as above comprises ante-chamber piston and back cavity piston; Hydraulic cavities interior separation is two independently hydraulic cavities by ante-chamber piston and back cavity piston; The front end of back cavity piston spring withstands on the inwall of back cavity piston closes one end, and rear end withstands on the inwall of hydraulic cavities rear end; Have groove in the middle part of one end outer face of ante-chamber piston closes as piston fixed link mounting hole, the front end of ante-chamber piston is connected with the rear end of piston fixed link and the rear end of piston push rod respectively; Ante-chamber piston spring front end withstands on the inwall of ante-chamber piston closes one end, and the rear end of ante-chamber piston spring withstands on the end face of back cavity piston closes one end.
It also comprises piston fixed link and piston push rod, piston fixed link is the metallic cylinder of hollow, No. 45 traditional steel are adopted to make, annular groove is had outside its leading portion, its rear end is arranged in the piston fixed link mounting hole of one end of hydraulic cavities ante-chamber piston closes, its leading portion is connected with brake shell body, limits it move by brake casing, and then the movement of restriction hydraulic cavities piston; Piston push rod is that metal is shaft-like, and rear end embeds in piston fixed link, withstands on one end outer face of ante-chamber piston closes.
Hydraulic power source as above adopts hydraulic accumulator to realize; Described electromagnetic valve comprises lockup piston chamber electromagnetic valve, brake wheel cylinder electromagnetic valve and hydraulic accumulator electromagnetic valve, and wherein, brake wheel cylinder electromagnetic valve has 4, and hydraulic accumulator electromagnetic valve has 2; Brake wheel cylinder totally 4, respectively 4 wheels of corresponding front and back; The liquid outlet of hydraulic accumulator is connected with the input end of hydraulic cavities ante-chamber, hydraulic cavities back cavity, 4 brake wheel cylinder electromagnetic valves, the input end of lockup piston chamber electromagnetic valve respectively by hydraulic accumulator electromagnetic valve; The mouth of brake wheel cylinder electromagnetic valve is connected with the inlet of 4 brake wheel cylinders 8 respectively; The mouth of lockup piston chamber electromagnetic valve is connected with the inlet in lockup piston chamber.
Brake shell body as above is cylindric, and its rear end end face has two through holes, and its leading portion is connected with simulator end face by bellows, protection brake pedal simulator; Back-end central part embeds in the groove outside piston fixed link, and limited piston fixed link moves.
It also comprises lockup piston chamber; Totally 2, described lockup piston chamber, they are connected with simulator housing and brake shell body respectively, and their front end is connected with simulator housing respectively, and middle part is each passed through two through holes of brake shell body rear end; Lockup piston chamber comprises lockup piston housing, lockup piston and damping spring; Lockup piston housing is closed cylindrical shape, and front lower portion has lockup piston chamber fluid hole, is connected, intracavity liquid is connected with brake circuit by the mouth of lockup piston chamber fluid hole with lockup piston chamber electromagnetic valve; Lockup piston left end is stock, and the large end of piston is rubber piston, and lockup piston left end stock is arranged in the lockup piston left end stock mounting hole on simulator housing by screw thread; Damping spring is contained in lockup piston right-hand member, plays guiding and shock damping action.
Beneficial effect of the present invention is:
Present invention eliminates vacuum booster, the mechanical connection between brake pedal and hydraulic cavities is cancelled, and effectively reduces total quality, compact conformation, is easy to arrange.Reduce structural complexity to a great extent, reduce cost.By adopting motor as propulsion source, adopt the ball spiral pair be made up of the outer nut integrated with rotor and hydraulic cavities 4, and the movement conversion mechanism that hydraulic cavities piston 5 forms, namely adopt machinery and electrical connection, signal transmission is rapid, and braking response is fast.Difference braking is achieved by Controlling solenoid valve and motor.By adopting brake pedal simulator, fitting piston push rod 22 and piston fixed link 23, achieve the braking backup of braking physical construction, when electrical structure lost efficacy, backup architecture can be got involved very soon, produce certain brake action, ensured driving safety, meet brake legislation demand.
Accompanying drawing explanation
Fig. 1 is a kind of principle schematic with the initiative brake control system in the motor driven liquid pressure chamber of backup of losing efficacy of the present invention;
Fig. 2 is brake system drive part schematic diagram in Fig. 1;
Fig. 3 is lockup piston cavity configuration schematic diagram in Fig. 1;
Fig. 4 is the structural representation of pre-tightening mechanism in Fig. 1;
In figure, 1. brake pedal, 2. motor, 3. outer nut, 4. hydraulic cavities, 5. hydraulic cavities piston, 6. lockup piston chamber electromagnetic valve, 7. brake wheel cylinder electromagnetic valve, 8. hydraulic accumulator electromagnetic valve, 9. hydraulic accumulator, 10. pressure sensor, 11. deep groove ball bearings, 12. rotary angle transmitters, 13. pretension vertical connecting rods, 14. pretension tranverse connecting rods, 15. lockup piston, 16. damping springs, 17. pedal displacement sensor, 18. attachment pegs, 19. preloading springs, 20. plunger shaft fluid holes, 21. lockup piston housings, 22. piston push rods, 23. piston fixed links, 24. damping elements, 25. pedal simulator damping springs, 26. simulator housings, 27. brake shell bodies, 28. brake wheel cylinders, 29. pedal push rods, 30. sleeves, 31. simulator stub axles, 32. simulator end faces, 33. dust boots.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, a kind of initiative brake control system with the motor driven liquid pressure chamber of backup of losing efficacy of the present invention is introduced:
As shown in Figure 1, a kind of initiative brake control system with the motor driven liquid pressure chamber of backup of losing efficacy, comprises brake shell body 27, motor 2, brake pedal simulator, movement conversion mechanism, hydraulic power source, electromagnetic valve and brake wheel cylinder 28.Wherein, brake shell body 27 is cylindric, and it is connected with brake pedal simulator.Motor 2 is connected with electronic control unit and movement conversion mechanism respectively, rotates under the control of electronic control unit, for movement conversion mechanism provides power.The convert rotational motion of motor 2 is straight-line motion by movement conversion mechanism.Brake pedal simulator is arranged on movement conversion mechanism front end, for simulating brake sensation and the braking intention obtaining chaufeur, when motor 2 lost efficacy, realizes wheel braking.Hydraulic power source is connected with movement conversion mechanism, reveals for compensating hydraulic pressure.Brake wheel cylinder 28 totally four, four brake wheel cylinders 28 are connected with movement conversion mechanism respectively by electromagnetic valve, under the control of electronic control unit, provide power for wheel realizes braking.
In the present embodiment, brake pedal simulator comprises brake pedal 1, pedal push rod 29, simulator end face 32, sleeve 30, simulator stub axle 31, simulator housing 26, damping element 24, pedal displacement sensor 17 and pedal simulator damping spring 25.Brake pedal 1 is bolted with the front end of pedal push rod 29, tramples lower drive pedal push rod 29 move at chaufeur.Simulator end face 32 is discoid, and its center has through hole, and it is fixedly connected with the front end of sleeve 30.Sleeve 30 is cylindric, taper hole is had in its front end surface, outside, middle part is provided with snap ring, the front end of snap ring withstands on in the front inner wall of simulator housing 26, have blind hole at the middle part of back segment as simulator stub axle 31 mounting hole, the size of this blind hole is consistent with the external diameter of simulator stub axle 31.The rear end of pedal push rod 29 is connected by ball pivot with the front end of sleeve 30 through the through hole in the middle part of simulator end face 32.Simulator housing 26 is the cylindrical shape of both ends open, and the size of rear and front end opening is consistent with the external diameter of sleeve 30 and the external diameter of simulator stub axle 31 rear end respectively, has tapped bore as lockup piston left end stock mounting hole in its rear end.Simulator stub axle 31 is cylinder, its front portion is arranged in the through hole in the middle part of sleeve 30, rear end external diameter is compared with the little 3 ~ 5mm of simulator stub axle 31 base portion external diameter, as 3mm, 4mm or 5mm, it is in the opening of rear end that rear end is arranged on simulator housing 26, has circular groove as damping element mounting hole in the center of simulator stub axle 31 rear end end face.Pedal simulator damping spring 25 is sleeved on outside sleeve 30 and simulator stub axle 31, front end withstands on the rear end end face of sleeve 30 snap ring, rear end withstands on simulator housing 26 on the inwall of rear end, and it is braked for chaufeur provides antagonistic force to simulate the brake feel of traditional vehicle.The pedal displacement sensor 17 of brake pedal simulator is connected by the lever of support with brake pedal 1, and is fixedly mounted on simulator housing 26 on bottom end face.When chaufeur steps on brake pedal 1, pedal displacement sensor 17 can collect pedal displacement signal, and this signal is sent to electronic control unit.Damping element 24 is arranged in the damping element mounting hole of simulator stub axle 31 rear end, corresponding with piston push rod 22 installation site, once motor 2 lost efficacy, brake pedal simulator can move promotion piston push rod 22 and produce braking force.Brake pedal 1 and pedal push rod 29 are matured product, are commercially available.Simulator end face 32, sleeve 30, simulator stub axle 31, simulator housing 26 are made for all adopting No. 45 steel.Pedal simulator damping spring 25, pedal displacement sensor 17 are the universal product, are commercially available.Damping element 24 is Rubber Parts.
As shown in Figure 2, movement conversion mechanism comprises ball spiral pair and hydraulic cavities piston 5, and hydraulic cavities piston 5 is arranged on ball spiral pair inside.
Ball spiral pair comprises hydraulic cavities 4 and outer nut 3.Hydraulic cavities 4 is ball screw hollow structure, the cavity volume of processing diameter 20mm, length 50mm in screw rod, cavity volume inner structure is consistent with traditional plunger-type brake master cylinder cavity volume, comprises ante-chamber and back cavity, and in the middle part of hydraulic cavities 4, outside has plug helix as outer nut mounting groove; Have two grooves in the both sides up and down of hydraulic cavities 4 afterbody and make pre-tightening mechanism mounting hole.Outer nut 3 is sleeved in the outer nut mounting groove of hydraulic cavities 4, coordinates realize ball spiral pair with hydraulic cavities 4.Motor 2 is hollow structure, is sleeved on outside outer nut 3, and motor 2 rotor and outer nut 3 become one, and the moment of torsion of motor 2 and dynamic response mate the demand of whole brake system.In the present embodiment, the stall moment of torsion of motor 2 is 4NM, and motor 2 locked rotor current can not be too large, and response time is short, and in 4ms, racing speed can reach 2000rpm, and rotating is short for switching time, and the unitary rotation inertia of motor 2 is 10
-5the order of magnitude; Drive outer nut 3 to rotate when motor 2 rotates, be converted into the rectilinear movement of hydraulic cavities 4 by ball and plug helix.Deep groove ball bearing 11 is sleeved on the two ends outside outer nut 3, for limiting the axial motion of outer nut 3.Rotary angle transmitter 12 is arranged on motor 2 rotor place, its mouth is connected with electronic control unit, for detecting the angular transposition and the position of hydraulic cavities 4 that outer nut 3 rotates, obtaining the relative displacement of piston and hydraulic cavities thus, and the angular displacement signal that detection obtains is sent to electronic control unit.In the present embodiment, outer nut 3, hydraulic cavities 4 and deep groove ball bearing 11 all adopt bearing steel to make, and make as adopted GCr15.
Hydraulic cavities piston 5 is universal piston structure, is arranged in hydraulic cavities 4, and installs with hydraulic cavities 4 matching internal, and its one end is connected with piston fixed link 23 by attachment pegs 18, limits the movement of hydraulic cavities piston 5.In the present embodiment, hydraulic cavities piston comprises ante-chamber piston and back cavity piston.Hydraulic cavities 4 interior separation is two independently hydraulic cavities by ante-chamber piston and back cavity piston.The front end of back cavity piston spring withstands on the inwall of back cavity piston closes one end, and rear end withstands on the inwall of hydraulic cavities 4 rear end; Have groove in the middle part of one end outer face of ante-chamber piston closes as piston fixed link mounting hole, its front end is connected with the rear end of piston fixed link and the rear end of piston push rod respectively; Ante-chamber piston spring front end withstands on the inwall of ante-chamber piston closes one end, and the rear end of ante-chamber piston spring withstands on the end face of back cavity piston closes one end.In the present embodiment, hydraulic cavities piston 5 adopts composite material to make, as Bi-metal Steel Aluminum.
Piston fixed link 23 is the metallic cylinder of hollow, No. 45 traditional steel are adopted to make, annular groove is had outside its leading portion, its rear end is arranged in the piston fixed link mounting hole of one end of hydraulic cavities piston 5 ante-chamber piston closes, its leading portion is connected with brake shell body 27, limit it by brake casing to move, and then limit the movement of piston 5.Piston push rod 22 is shaft-like, and its rear end embeds in piston fixed link 23, withstands on one end outer face of ante-chamber piston closes.In the present embodiment, piston push rod 22 is made of metal, as being made up of 7075 aluminium.Hydraulic cavities piston 5 and piston fixed link 23 can be made when promoting piston push rod 22 to depart from, and hydraulic cavities piston 5 can move axially.
Brake shell body 27 is cylindric, is made up, its rear end end face has two through holes of No. 45 steel, and its leading portion is connected with simulator end face by dust boot 33, protection brake pedal simulator; Back-end central part embeds in the groove outside piston fixed link, and restriction fixed piston fixed link 23 moves.Dust boot 33 adopts bellows to realize.
As shown in Figure 3, pre-tightening mechanism totally 2, they are arranged in the pre-tightening mechanism groove of hydraulic cavities about 4 both sides respectively, and it comprises pretension tranverse connecting rod 14, preloading spring 19 and pretension vertical connecting rod 13.Pretension vertical connecting rod 13 is shaft-like, and its top has cylindrical hole as pretension tranverse connecting rod 14 mounting hole, and its bottom straight cutting enters in the pre-tightening mechanism groove of hydraulic cavities 4.Pretension tranverse connecting rod 14 is shaft-like, and its one end is passed pretension tranverse connecting rod 14 mounting hole of pretension vertical connecting rod 13, is arranged on brake shell body 27.Preloading spring 19 is sleeved on outside tight tranverse connecting rod 14, and be stuck between brake shell body 27 and pretension tranverse connecting rod 14, preloading spring 19 keeps certain amount of compression, makes hydraulic cavities 4 ball spiral pair pretension.Pretension vertical connecting rod and pretension tranverse connecting rod can adopt No. 45 steel to make. preloading spring is gauge member, is commercially available.
Hydraulic power source adopts hydraulic accumulator 9 to realize.Electromagnetic valve comprises lockup piston chamber electromagnetic valve 6, brake wheel cylinder electromagnetic valve 7 and hydraulic accumulator electromagnetic valve 8, and wherein, brake wheel cylinder electromagnetic valve 7 has 4, and hydraulic accumulator electromagnetic valve 8 has 2, and hydraulic accumulator electromagnetic valve 8 is normally closed valve.The liquid outlet of hydraulic accumulator 9 is connected with the input end of hydraulic cavities 4 ante-chamber, hydraulic cavities 4 back cavity, 4 brake wheel cylinder electromagnetic valves 7, the input end of lockup piston chamber electromagnetic valve 6 respectively by hydraulic accumulator electromagnetic valve 8.The mouth of brake wheel cylinder electromagnetic valve 7 is connected with the inlet of 4 brake wheel cylinders 28 respectively.The mouth of lockup piston chamber electromagnetic valve 6 is connected with the inlet in lockup piston chamber.Above-mentioned hydraulic accumulator 9, electromagnetic valve, connection between hydraulic cavities 4 and lockup piston chamber are all realized by hydraulic tubing.
The control end of above-mentioned electromagnetic valve is all connected with electronic control unit, action under the control of its control signal.Pressure sensor 10 is arranged on hydraulic accumulator electromagnetic valve 8 with on the pipeline of hydraulic cavities 4 ante-chamber, adopts the universal product.
By controlling the switch of the electromagnetic valve 8 of energy storage, hydraulic accumulator 9 can be made optionally to connect with hydraulic tubing, pressure line is directly communicated with two epitrochoidal chambers of hydraulic cavities 4, the size of pedal simulator 23 and piston push rod 22 idle travel is realized by controlling liquid turnover hydraulic accumulator 9, when braking liquid enters hydraulic accumulator 9, idle travel will increase, and when braking liquid oppositely flows out, idle travel will diminish.Equally, by controlling 4 brake wheel cylinder electromagnetic valves 7 respectively, hydraulic accumulator 9 can be realized and compensate braking liquid leakage loss, and then the effect of adjustment car side brake brake clearance.
Concrete control realization mode is obtained by pressure sensor 10 pressure of hydraulic cavities 4 and hydraulic tubing, hydraulic cavities 4 displacement is calculated by rotary angle transmitter 12, according to the action of brake wheel cylinder electromagnetic valve 7 and the fluid pressure of wheel cylinder and the relation of volume and P-V characteristic estimation pressure of wheel braking cylinder value, accurate control and the adjustment of pressure can be realized.
Attachment pegs 18 used in the present invention is tapered pin, adopts No. 45 steel to make.Hydraulic cavities piston 5 ante-chamber piston is connected with piston fixed link 23 by attachment pegs 18, and ante-chamber piston cannot be moved axially, and when applying certain effect power on piston push rod 22, piston 5 can move together with push rod 22.Hydraulic cavities piston 5 is connected and fixed by attachment pegs 18 and piston fixed link 23, and piston fixed link 23 is fixed by brake shell body 27, when namely achieving conventional brake, piston is fixed, hydraulic cavities 4 feed motion, and when losing efficacy, also directly can produce brake action by piston push rod 22.
As shown in Figure 4, totally 2, lockup piston chamber, they are connected with simulator housing 26 and brake shell body 27 respectively, and their front end is connected with simulator housing 26 respectively, and middle part is each passed through two through holes of brake shell body 27 rear end.Lockup piston chamber comprises lockup piston housing 21, lockup piston 15 and damping spring 16.Lockup piston housing 21 is the cylindrical shape closed, and has lockup piston chamber fluid hole 20, be connected, intracavity liquid is connected with brake circuit by the mouth of lockup piston chamber fluid hole 20 with lockup piston chamber electromagnetic valve 6 at its front lower portion.Lockup piston 15 left end is stock, and the large end of piston is rubber piston, and lockup piston left end stock is arranged on by screw thread in the lockup piston left end stock mounting hole on simulator housing 26.Damping spring 16 is contained in lockup piston 15 right-hand member, and play guiding and shock damping action, spring stiffness K is less than 5000N/m.When fluid hole 20 place, lockup piston chamber lockup piston chamber electromagnetic valve 6 is closed, then lockup piston 15 inner sealing has liquid, and lockup piston 15 cannot move, then simulator housing 26 also cannot move linearly.When lockup piston chamber electromagnetic valve 6 is opened, lockup piston 15 can promote liquid in hydraulic circuit, and namely lockup piston 15 is movable linearly.Same simulator housing 26 is also movable, spacing releasing.Lockup piston housing 21 is ironcasting, and lockup piston 15 is made up, as Bi-metal Steel Aluminum of employing composite material.
Brake wheel cylinder adopts spheroidal graphite iron to make.
Electromagnetic valve in native system all adopts high-speed switch valve, for matured product on the market, pressure sensor 10 also continues to use the scheme of Conventional braking systems, rotary angle transmitter 12 and pedal displacement sensor 17 all select existing product, the version of pedal simulator is also existing technology, and implementation must be checking.Electronic control unit is matured product, and it can adopt existing techniques in realizing to the control of motor 2, electromagnetic valve, brake wheel cylinder 28.
Below the working process of native system is introduced:
Automobile is when normally travelling, when chaufeur steps on brake pedal 1, electronic control unit stroke sensor 17 analyzes driver intention, drive motor 2 rotates, make hydraulic cavities 4 straight-line motion by ball spiral pair, hydraulic cavities piston 5 is fixed by piston fixed link 23 and attachment pegs 18, produces brake-pressure in hydraulic cavities 4, open brake wheel cylinder electromagnetic valve 7, braking liquid enters brake wheel cylinder 28 and produces lock torque.If need pressurize, brake wheel cylinder electromagnetic valve 7 is closed, brake wheel cylinder 28 pressurize.If when need reduce pressure, motor 2 reverses, hydraulic cavities 4 oppositely movement, and same brake wheel cylinder electromagnetic valve 7 is opened, and braking liquid is back in hydraulic cavities 4 from brake wheel cylinder 28.
When each brake wheel cylinder 28 pressure of brake request there are differences, electronic control unit can open separately the brake wheel cylinder electromagnetic valve 7 such as controlling the near front wheel, closes other 3 brake wheel cylinder electromagnetic valves 7, carries out braking pressure control to the near front wheel.After this process terminates, close the brake wheel cylinder electromagnetic valve 7 of the near front wheel, pressure adjustment is carried out in 3 remaining brake wheel cylinders 28, makes 4 pressure of wheel braking cylinder in certain control cycle, reach the brake-pressure of expectation according to this, namely control adopt sequential system flowing mode according to priority.
When power source motor 2 et out of order, the electromagnetic valve 6 for lockup piston chamber is opened, and under normal circumstances, electromagnetic valve 6 is closed, and namely making pedal simulator unit 22 fix in the axial direction, people can not be produced when stepping on brake pedal loosening.Electromagnetic valve 6 is opened, lockup piston chamber is communicated with hydraulic cavities 4 by hydraulic tubing, now when people steps on brake pedal 1 again, pedal stroke simulator 23 will move axially, when overcome with the idle travel of piston push rod 22 after, can promote hydraulic cavities piston 5 together with piston push rod 22 and produce brake-pressure, namely this system has braking backup units.
The braking anti-lock stage, on the basis of conventional brake, if off front wheel enters slip state, then electronic control unit reduces pressure to right brake wheel cylinder 28, namely the brake wheel cylinder electromagnetic valve 7 between right brake wheel cylinder 28 and hydraulic cavities 4 is opened, motor 2 reverses and drives hydraulic cavities 4 oppositely movement, hydraulic cavities 4 pressure drop, now right front brake wheel cylinder 28 pressure is greater than hydraulic cavities 4 inside brake hydraulic coupling, off front wheel reduces pressure, and other three road brake wheel cylinder electromagnetic valves 7 are closed, be in packing state, if there is many wheels to enter slip state, then electronic control unit controls each brake wheel cylinder 28 pressure successively by control logic, certain pressure of taking turns brake wheel cylinder 28 regulates, also can be completed in several times adjustment circulation by electronic control unit, its principle and single-wheel increase, subtract, the principle of pressurize is consistent.
When electronic stability controls, when after vehicle unstability, electronic control unit is by analyzing each sensor and brake wheel cylinder 28 pressure, in conjunction with the status information of vehicle, calculate the pressure that each target brake wheel cylinder 28 needs to regulate, then brake wheel cylinder 28 increased, subtract, pressure maintaining period, its principle, with wheel anti-lock situation during braking, makes brake wheel cylinder 28 pressure reach anticipated value.
Initiatively the deboost phase, the signal gathered by sensor, is distributed the pressure of each brake wheel cylinder 28 by electronic control unit, this system also can carry out active boost to each brake wheel cylinder 28, and its process as previously mentioned.
Of the present inventionly eliminate vacuum booster relative to traditional brake system, eliminate the dependence to engine vacuum degree, adopt motor 2 as propulsion source, adopt the ball spiral pair be made up of the outer nut integrated with rotor and hydraulic cavities 4, and the movement conversion mechanism that hydraulic cavities piston 5 forms, achieve the adjustability of assist rate, reduce the volume of brake system, arrange flexibly convenient, compact conformation.Adopt machinery and electrical connection, signal transmission is rapid, and braking response is fast.
This brake system achieves the decoupling zero of pedal stroke and piston stroke, and namely pedal simulator is simulated and resolved chaufeur braking intention, is more applicable for hybrid vehicle and electronlmobil, the function of compatible Brake energy recovery.Tradition ABS in the course of the work because active decompression can produce compression shock to brake system, fluctuation of pressure can be delivered to chaufeur, causes pedal " to pinch ", even and if this system ABS, ESP effect time, also can not on chaufeur sensation generation any impact.
By adopting brake pedal simulator, fitting piston push rod 22 and piston fixed link 23, achieve the braking backup of braking physical construction, when electrical structure lost efficacy, backup architecture can be got involved very soon, produce certain brake action, ensured driving safety, meet brake legislation demand.
Claims (10)
1. there is the initiative brake control system in the motor driven liquid pressure chamber of backup of losing efficacy, comprise brake shell body (27), motor (2), hydraulic power source, electromagnetic valve and brake wheel cylinder (28); It is characterized in that: it also comprises brake pedal simulator and movement conversion mechanism; Wherein, described brake shell body (27) is cylindric, is connected with brake pedal simulator; Motor (2) is connected with electronic control unit and movement conversion mechanism respectively, rotates under the control of electronic control unit, for movement conversion mechanism provides power; The convert rotational motion of motor (2) is straight-line motion by movement conversion mechanism; Brake pedal simulator is arranged on movement conversion mechanism front end, for simulating brake sensation and the braking intention obtaining chaufeur, when motor failure, realizes wheel braking; Hydraulic power source is connected with movement conversion mechanism, reveals for compensating hydraulic pressure; Brake wheel cylinder (28) totally four, four brake wheel cylinders (28) are connected with movement conversion mechanism respectively by electromagnetic valve, under the control of electronic control unit, provide power for wheel realizes braking.
2. a kind of initiative brake control system with the motor driven liquid pressure chamber of backup of losing efficacy according to claim 1, is characterized in that: described brake pedal simulator comprises brake pedal (1), pedal push rod (29), simulator end face (32), sleeve (30), simulator stub axle (31), simulator housing (26), damping element (24), pedal displacement sensor (17) and pedal simulator damping spring (25); Brake pedal (1) is connected with the front end of pedal push rod (29), tramples the motion of lower drive pedal push rod (29) at chaufeur; Simulator end face (32) is for discoid, and center has through hole, is fixedly connected with the front end of sleeve (30); Sleeve (30) is cylindric, and front end surface has taper hole, is provided with snap ring outside middle part, and the front end of snap ring withstands on in the front inner wall of simulator housing (26), has blind hole as simulator stub axle (31) mounting hole at the middle part of back segment; The rear end of pedal push rod (29) is connected with the front end of sleeve (30) through the through hole in the middle part of simulator end face (32); The cylindrical shape that simulator housing (26) is both ends open, the size of rear and front end opening is consistent with the external diameter of sleeve (30) and the external diameter of simulator stub axle (31) rear end respectively, and rear end has tapped bore as lockup piston left end stock mounting hole; Simulator stub axle (31) is cylinder, front portion is arranged in the through hole at sleeve (30) middle part, rear end external diameter is the little 3 ~ 5mm of simulator stub axle (31) base portion external diameter comparatively, rear end is arranged in the opening that simulator housing (26) is rear end, has circular groove as damping element mounting hole in the center of simulator stub axle (31) rear end end face; Pedal simulator damping spring (25) is sleeved on sleeve (30) and simulator stub axle (31) outward, front end withstands on the rear end end face of sleeve (30) snap ring, rear end withstands on simulator housing (26) on the inwall of rear end, for chaufeur braking provides antagonistic force to simulate the brake feel of traditional vehicle; The pedal displacement sensor (17) of brake pedal simulator is connected by the lever of support with brake pedal (1), and is fixedly mounted on simulator housing (26) on bottom end face; Damping element (24) is arranged in the damping element mounting hole of simulator stub axle (31) rear end, corresponding with piston push rod (22) installation site.
3. a kind of initiative brake control system with the motor driven liquid pressure chamber of backup of losing efficacy according to claim 1 and 2, it is characterized in that: described movement conversion mechanism comprises ball spiral pair and hydraulic cavities piston (5), and hydraulic cavities piston (5) is arranged on ball spiral pair inside; Wherein, ball spiral pair comprises hydraulic cavities (4) and outer nut (3); Wherein, hydraulic cavities (4) is ball screw hollow structure, the cavity volume of processing diameter 20mm, length 50mm in screw rod, and cavity volume inner structure is consistent with traditional plunger-type brake master cylinder cavity volume, comprises ante-chamber and back cavity; Outside, hydraulic cavities (4) middle part has plug helix as outer nut mounting groove; Have two grooves in the both sides up and down of hydraulic cavities (4) afterbody and make pre-tightening mechanism mounting hole; Outer nut (3) is sleeved in the outer nut mounting groove of hydraulic cavities (4), coordinates realize ball spiral pair with hydraulic cavities (4).
4. a kind of initiative brake control system with the motor driven liquid pressure chamber of backup of losing efficacy according to claim 3, it is characterized in that: described motor (2) is hollow structure, be sleeved on outer nut (3) outside, rotor and outer nut (3) become one, and the moment of torsion of motor (2) and dynamic response mate the demand of whole brake system.
5. a kind of initiative brake control system with the motor driven liquid pressure chamber of backup of losing efficacy according to claim 4, it is characterized in that: described hydraulic cavities piston (5) is universal piston structure, be arranged in hydraulic cavities (4), and install with hydraulic cavities (4) matching internal, its one end is connected with piston fixed link (23) by attachment pegs 18, the movement of restriction hydraulic cavities (4).
6. a kind of initiative brake control system with the motor driven liquid pressure chamber of backup of losing efficacy according to claim 5, is characterized in that: described hydraulic cavities piston (5) comprises ante-chamber piston and back cavity piston; Hydraulic cavities (4) interior separation is two independently hydraulic cavities by ante-chamber piston and back cavity piston; The front end of back cavity piston spring withstands on the inwall of back cavity piston closes one end, and rear end withstands on the inwall of hydraulic cavities (4) rear end; Have groove in the middle part of one end outer face of ante-chamber piston closes as piston fixed link (23) mounting hole, the front end of ante-chamber piston is connected with the rear end of piston fixed link (23) and the rear end of piston push rod respectively; Ante-chamber piston spring front end withstands on the inwall of ante-chamber piston closes one end, and the rear end of ante-chamber piston spring withstands on the end face of back cavity piston closes one end.
7. a kind of initiative brake control system with the motor driven liquid pressure chamber of backup of losing efficacy according to claim 6, it is characterized in that: it also comprises piston fixed link (23) and piston push rod (22), the metallic cylinder that piston fixed link (23) is hollow, No. 45 traditional steel are adopted to make, annular groove is had outside its leading portion, its rear end is arranged in piston fixed link (23) mounting hole of one end of hydraulic cavities (4) ante-chamber piston closes, its leading portion is connected with brake shell body (27), limit it by brake casing to move, and then the movement of restriction hydraulic cavities piston (5), piston push rod (22) for metal shaft-like, rear end embeds in piston fixed link (23), withstands on one end outer face of ante-chamber piston closes.
8. a kind of initiative brake control system with the motor driven liquid pressure chamber of backup of losing efficacy according to claim 1, is characterized in that: described hydraulic power source adopts hydraulic accumulator (9) to realize; Described electromagnetic valve comprises lockup piston chamber electromagnetic valve (6), brake wheel cylinder electromagnetic valve (7) and hydraulic accumulator electromagnetic valve (8), and wherein, brake wheel cylinder electromagnetic valve (7) has 4, and hydraulic accumulator electromagnetic valve (8) has 2; The liquid outlet of hydraulic accumulator (9) is connected with the input end of hydraulic cavities (4) ante-chamber, hydraulic cavities (4) back cavity, 4 brake wheel cylinder electromagnetic valves (7), the input end in lockup piston chamber electromagnetic valve (6) respectively by hydraulic accumulator electromagnetic valve (8); The mouth of brake wheel cylinder electromagnetic valve (7) is connected with the inlet of 4 brake wheel cylinders (28) respectively; The mouth in lockup piston chamber electromagnetic valve (6) is connected with the inlet in lockup piston chamber.
9. a kind of initiative brake control system with the motor driven liquid pressure chamber of backup of losing efficacy according to claim 1, it is characterized in that: described brake shell body (27) is for cylindric, its rear end end face has two through holes, its leading portion is connected with simulator end face (32) by bellows (33), protection brake pedal simulator; Back-end central part embeds in the groove in piston fixed link (23) outside, and limited piston fixed link (23) is mobile.
10. a kind of initiative brake control system with the motor driven liquid pressure chamber of backup of losing efficacy according to claim 1, is characterized in that: it also comprises lockup piston chamber; Totally 2, described lockup piston chamber, they are connected with simulator housing (26) and brake shell body (27) respectively, their front end is connected with simulator housing (26) respectively, and middle part is each passed through two through holes of brake shell body (27) rear end; Lockup piston chamber comprises lockup piston housing (21), lockup piston (15) and damping spring (16); Lockup piston housing (21) is the cylindrical shape closed, and front lower portion has lockup piston chamber fluid hole, is connected by the mouth of lockup piston chamber fluid hole (20) with lockup piston chamber electromagnetic valve, and intracavity liquid is connected with brake circuit; Lockup piston (15) left end is stock, and the large end of piston is rubber piston, and lockup piston (15) left end stock is arranged in the lockup piston left end stock mounting hole on simulator housing (26) by screw thread; Damping spring (16) is contained in lockup piston (15) right-hand member, plays guiding and shock damping action.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310428844.1A CN104442783B (en) | 2013-09-20 | 2013-09-20 | Motor driven liquid with failure backup presses the active brake draught control system in chamber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310428844.1A CN104442783B (en) | 2013-09-20 | 2013-09-20 | Motor driven liquid with failure backup presses the active brake draught control system in chamber |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104442783A true CN104442783A (en) | 2015-03-25 |
| CN104442783B CN104442783B (en) | 2017-07-11 |
Family
ID=52889764
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310428844.1A Expired - Fee Related CN104442783B (en) | 2013-09-20 | 2013-09-20 | Motor driven liquid with failure backup presses the active brake draught control system in chamber |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104442783B (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106740777A (en) * | 2015-11-20 | 2017-05-31 | 上海汇众汽车制造有限公司 | Two-cylinder type braking Fu Gang mechanisms |
| CN108032851A (en) * | 2018-01-08 | 2018-05-15 | 吉林大学 | A kind of brake pedal travel simulator and its control method |
| CN109177946A (en) * | 2018-11-02 | 2019-01-11 | 吉林大学 | A kind of full decoupled formula integrated electronic brake fluid system of reactionless disk |
| US11072316B2 (en) * | 2016-05-13 | 2021-07-27 | Continental Teves Ag & Co. Ohg | Braking device for a hydraulic motor vehicle braking system having a ball screw drive |
| CN113942479A (en) * | 2020-07-15 | 2022-01-18 | 比亚迪股份有限公司 | Braking system and automobile |
| CN115038625A (en) * | 2020-02-04 | 2022-09-09 | 株式会社万都 | Electronic brake system and control method thereof |
| US11613239B2 (en) | 2021-06-12 | 2023-03-28 | Bwi (Shanghai) Co., Ltd. | Pressure supply unit for a brake system of a vehicle |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102556035A (en) * | 2010-12-09 | 2012-07-11 | 日立汽车系统株式会社 | Electric motor-driven booster |
| KR20120119150A (en) * | 2011-04-20 | 2012-10-30 | 현대모비스 주식회사 | Vehicle brake apparatus with fail-safe function |
| CN103010199A (en) * | 2012-12-27 | 2013-04-03 | 清华大学 | Brake-by-wire system of automobile |
| CN203460857U (en) * | 2013-09-20 | 2014-03-05 | 吉林大学 | Driving braking force adjusting system with failure backup function for motor driving hydraulic cavity |
-
2013
- 2013-09-20 CN CN201310428844.1A patent/CN104442783B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102556035A (en) * | 2010-12-09 | 2012-07-11 | 日立汽车系统株式会社 | Electric motor-driven booster |
| KR20120119150A (en) * | 2011-04-20 | 2012-10-30 | 현대모비스 주식회사 | Vehicle brake apparatus with fail-safe function |
| CN103010199A (en) * | 2012-12-27 | 2013-04-03 | 清华大学 | Brake-by-wire system of automobile |
| CN203460857U (en) * | 2013-09-20 | 2014-03-05 | 吉林大学 | Driving braking force adjusting system with failure backup function for motor driving hydraulic cavity |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106740777A (en) * | 2015-11-20 | 2017-05-31 | 上海汇众汽车制造有限公司 | Two-cylinder type braking Fu Gang mechanisms |
| US11072316B2 (en) * | 2016-05-13 | 2021-07-27 | Continental Teves Ag & Co. Ohg | Braking device for a hydraulic motor vehicle braking system having a ball screw drive |
| CN108032851A (en) * | 2018-01-08 | 2018-05-15 | 吉林大学 | A kind of brake pedal travel simulator and its control method |
| CN108032851B (en) * | 2018-01-08 | 2024-01-02 | 吉林大学 | Brake pedal stroke simulator and control method thereof |
| CN109177946A (en) * | 2018-11-02 | 2019-01-11 | 吉林大学 | A kind of full decoupled formula integrated electronic brake fluid system of reactionless disk |
| CN109177946B (en) * | 2018-11-02 | 2019-05-31 | 吉林大学 | A kind of full decoupled formula integrated electronic brake fluid system of reactionless disk |
| CN115038625A (en) * | 2020-02-04 | 2022-09-09 | 株式会社万都 | Electronic brake system and control method thereof |
| CN115038625B (en) * | 2020-02-04 | 2024-04-23 | 汉拿万都株式会社 | Electronic brake system and control method thereof |
| CN113942479A (en) * | 2020-07-15 | 2022-01-18 | 比亚迪股份有限公司 | Braking system and automobile |
| CN113942479B (en) * | 2020-07-15 | 2023-09-05 | 比亚迪股份有限公司 | Braking system and automobile |
| US11613239B2 (en) | 2021-06-12 | 2023-03-28 | Bwi (Shanghai) Co., Ltd. | Pressure supply unit for a brake system of a vehicle |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104442783B (en) | 2017-07-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104442783A (en) | Initiative brakeage regulating system with failure backup of motor drive liquid chamber | |
| CN104442779B (en) | Movement conversion mechanism and actively the Multifunctional brake system of regulation are turned round with slowing down to increase | |
| CN203460857U (en) | Driving braking force adjusting system with failure backup function for motor driving hydraulic cavity | |
| US9815445B2 (en) | Brake booster assembly | |
| CN203651744U (en) | Multifunctional braking system provided with speed-reducing torque-increasing motion transformation mechanism and having initiative adjustment function | |
| CN104196929B (en) | Worm and inclined-worm-gear-disc type electronic parking brake | |
| CN107985292B (en) | Electric power-assisted braking system with completely separated brake pedal and power-assisted mechanism | |
| CN207510412U (en) | A kind of master cylinder for taking into account parking and service brake | |
| CN107128294B (en) | Double-rotor machine line traffic control brake fluid system | |
| CN107804308A (en) | A kind of master cylinder and its braking method for taking into account parking and service brake | |
| CN110525403A (en) | Electro-hydraulic actuator and liquid braking device and braking system with it | |
| CN107139913B (en) | A kind of electric-controlled hydraulic power brake master cylinder | |
| CN207860163U (en) | The compound line control brake system of four-wheel pressure independent control | |
| CN109649363B (en) | Electromechanical hydraulic brake, brake control method and electronic hydraulic line control brake system | |
| CN105270378A (en) | Vehicle brake assisting system | |
| CN102085857A (en) | Electric booster | |
| JP2012081799A (en) | Electric booster | |
| WO2019062740A1 (en) | Brake-by-wire system and vehicle | |
| CN108248592A (en) | Electric-machine directly-driven line control brake system and its brake control method with master/slave cylinder | |
| CN207860165U (en) | Electric-machine directly-driven line control brake system with master/slave cylinder | |
| WO2019062745A1 (en) | Brake-by-wire system and vehicle | |
| CN206826634U (en) | A kind of electric-controlled hydraulic power brake master cylinder | |
| CN106740777B (en) | Double-cylinder type braking auxiliary cylinder mechanism | |
| CN211642151U (en) | Electric cylinder device with high dynamic characteristic and self-locking at limit position | |
| CN206268165U (en) | A kind of cycloid hydraulic motor of built-in machines brake |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB03 | Change of inventor or designer information |
Inventor after: He Rui Inventor after: Deng Weiwen Inventor after: Xie Zhiwei Inventor after: Wu Jian Inventor after: Zhao Yang Inventor before: Deng Weiwen Inventor before: Xie Zhiwei Inventor before: He Rui Inventor before: Wu Jian |
|
| COR | Change of bibliographic data | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170711 Termination date: 20190920 |