CN205365566U - Electromechanical braking booster unit - Google Patents

Electromechanical braking booster unit Download PDF

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Publication number
CN205365566U
CN205365566U CN201521011405.1U CN201521011405U CN205365566U CN 205365566 U CN205365566 U CN 205365566U CN 201521011405 U CN201521011405 U CN 201521011405U CN 205365566 U CN205365566 U CN 205365566U
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CN
China
Prior art keywords
master cylinder
piston
cavity
electromechanical braking
brake pedal
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Expired - Fee Related
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CN201521011405.1U
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Chinese (zh)
Inventor
杨得新
补文杰
徐晔
平艳盈
陆红军
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Shanghai Huizhong Automotive Manufacturing Co Ltd
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Shanghai Huizhong Automotive Manufacturing Co Ltd
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Priority to CN201521011405.1U priority Critical patent/CN205365566U/en
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Abstract

The utility model provides an electromechanical braking booster unit, electromechanical braking booster unit includes: brake pedal operating mechanism, the brake master cylinder subassembly, the brake master cylinder subassembly with brake pedal operating mechanism connects, electromechanical helping hand unit and ecu, ecu is connected to electromechanical helping hand unit brake pedal operating mechanism reaches the brake master cylinder subassembly is used for controlling wholely electromechanical braking booster unit's operation. The utility model discloses electromechanical braking booster unit simple structure, the system is stable, can accomplish hydraulic pressure friction braking, its safe and reliable to the brake master cylinder piston through brake pedal direct action. Simultaneously whole device degree of freedom on structural grouping is high, can with integrated also can be independent separately, and layout design's the degree of freedom is high when integrated.

Description

Electromechanical braking power assisting device
Technical field
This utility model relates to brake system of car field, particularly to a kind of electromechanical braking power assisting device.
Background technology
Along with the development of automotive engineering, there is motor-driven new-energy automobile fast-developing.In this kind of vehicle, in order to increase continual mileage, it is necessary to utilize the reversion (being transformed into electromotor) of drive motor that automobile kinetic energy is converted to electrical power storage during by braking and carry out regenerative braking to the energy storage device (accumulator, power flywheel or super capacitor etc.) of automobile.At this moment, it is necessary to reducing as far as possible or stop traditional mechanical friction braking (kinetic energy of automobile being changed into heat energy be dispersed in air), it needs brakes to carry out decoupling to coordinate the ratio of regenerative braking and frictional damping.
On the other hand, along with the development of electronic technology and network technology, automobile develops to intelligent direction.Such as automatic parking, automatic Pilot are developed increasing advanced automobile technology, these systems requiring, brakes can carry out network connection, perform actively braking function when being independent of pilot control brakes, this just requires that brake system of car possesses electric-control system and is independent of pilot control and can automatically perform the function braked.
In orthodox car brake fluid system, it is mainly made up of brake pedal, vacuum booster, master cylinder and fluid reservoir, ABS/ESP, related sensor, brake piping, brake.Wherein, vacuum servo is to rely on engine charge vacuum source or other vacuum pump to provide power-assisted for brakes.But, new-energy automobile such as EV pure electric automobile does not possess vacuum source.Therefore, development with electric vehicle engineering automatically controlled along with electronics, occur in that one is independent of vacuum source, directly by motor-driven electronics booster (eBooster product), it is mainly characterized by replacing traditional vacuum booster, by the stroke of sensor measurement pedal and speed, pedal travel is converted into the signal of telecommunication and passes to ECU (electronic control unit).
Being sent action command by analyzing to motor by ECU, motor+reducing gear (ball-screw, rack-and-pinion etc.) promotes master cylinder to produce brake pressure.Owing to substituted for traditional machine driving with the signal of telecommunication, brake pedal force is not directly delivered on master cylinder.So, during braking, pedal sense will die down, in order to keep the brake pedal feel of orthodox car, therefore in these structures by increasing some frame for movement (such as spring), the also associating assist motor having comes together to increase pedal (power) sensation further, can produce different brake feels (assist characteristic curve) by drive motor as passed through the different set to control software design.
Utility model content
The technical problems to be solved in the utility model is to overcome the defect that in prior art, the brake pedal feel of orthodox car cannot keep, it is provided that a kind of electromechanical braking power assisting device.
This utility model solves above-mentioned technical problem by following technical proposals: a kind of electromechanical braking power assisting device, it is characterized in that, described electromechanical braking power assisting device includes: brake pedal mechanism;
Master cylinder assembly, described master cylinder assembly is connected with described brake pedal mechanism;
Dynamo-electric power-assisted unit and electronic control unit, described electronic control unit is connected to described dynamo-electric power-assisted unit, described brake pedal mechanism and described master cylinder assembly, for controlling the operation of whole described electromechanical braking power assisting device.
It is preferred that described master cylinder assembly includes: master cylinder housing, for the hollow type housing of one end open;
Active piston and master cylinder end cap, described master cylinder end cap is arranged on the one end open place of described master cylinder housing, one end of described active piston is stretched in described brake master cylinder housing body through described master cylinder end cap, and the other end is connected with described brake pedal mechanism by pedal push rod;
First master cylinder piston and the second master cylinder piston, be successively set in described brake master cylinder housing body;
It is connected with each other by the first return spring between described active piston and described first master cylinder piston, forms the first cavity;It is connected with each other by the second return spring between described first master cylinder piston and described second master cylinder piston, forms the second cavity;Described second master cylinder piston is connected to the inwall of described master cylinder housing by the 3rd return spring, forms the 3rd cavity.
It is preferred that described electromechanical braking power assisting device also includes fluid reservoir, described fluid reservoir is connected with the upper end of described master cylinder housing by multiple-tubing string.
It is preferred that described fluid reservoir is connected with described second cavity by the first oil pipe, connected with described 3rd cavity by the second oil pipe.
It is preferred that described active piston and described master cylinder end cap junction are provided with a PTS, described PTS electrically connects with described electronic control unit.
Preferably, described dynamo-electric power-assisted unit includes drive mechanism, power-assisted push rod, boosting piston and servo-cylinder housing, described servo-cylinder housing is connected with described drive mechanism, one end of described power-assisted push rod is connected with described boosting piston, the other end is connected with described drive mechanism, by described power-assisted pushrod movement make described boosting piston in described servo-cylinder housing reciprocating.
It is preferred that connected by the 4th return spring between the inwall of described boosting piston and described servo-cylinder housing, form the 4th cavity.
It is preferred that described servo-cylinder housing be provided externally with a servo-cylinder pressure transducer, described servo-cylinder pressure transducer electrically connects with described electronic control unit.
It is preferred that offer the first fuel feed hole on described master cylinder housing, described servo-cylinder housing offering the second fuel feed hole, described first fuel feed hole is connected with described second fuel feed hole so that described 4th cavity connects with described first cavity;
Between the first fuel feed hole and described second fuel feed hole, it is provided with one or two two usual valve closing, is electrically connected with described electronic control unit by described 2/2-way normally close valve.
It is preferred that described first oil pipe is connected with described first fuel feed hole, and between described first oil pipe and described first fuel feed hole, it is provided with the first 2/2-way normally open valve, is electrically connected with described electronic control unit by described first 2/2-way normally open valve.
It is preferred that be additionally provided with the second 2/2-way normally open valve and the 3rd 2/2-way normally open valve in the outside wall surface of described master cylinder housing, described second 2/2-way normally open valve connects with described second cavity, and electrically connects with described electronic control unit;Described 3rd 2/2-way normally open valve connects with described 3rd cavity, and electrically connects with described electronic control unit.
It is preferred that described master cylinder housing is provided with a master cylinder pressure sensor, described master cylinder pressure sensor electrically connects with described electronic control unit.
Preferably, described master cylinder assembly also includes back stay, and one end of described back stay is connected with described first master cylinder piston, and the other end is connected with described active piston, offering a chute in described active piston, the other end of described back stay is slidably installed in described chute.
Preferably, described brake pedal mechanism includes brake pedal and brake pedal switch, described brake pedal is connected with described pedal push rod, and described brake pedal switch is arranged on described brake pedal, and described brake pedal switch electrically connects with described electronic control unit.
Positive progressive effect of the present utility model is in that:
This utility model electromechanical braking power assisting device simple in construction, system stability, it is possible to being applied directly on brake master cylinder piston by brake pedal and complete hydraulic frictional braking, it is safe and reliable.Whole device degree of freedom on structural grouping is high simultaneously, namely can integrated can also be each independent, and time integrated, the degree of freedom of layout design is high.
Accompanying drawing explanation
The above and other feature of this utility model, character and advantage will be become apparent by the description below in conjunction with drawings and Examples, and accompanying drawing labelling identical in the accompanying drawings represents identical feature all the time, wherein:
Fig. 1 is the schematic diagram of this utility model electromechanical braking power set.
Fig. 2 is the structural representation that in this utility model electromechanical braking power set, active piston and back stay coordinate.
Detailed description of the invention
For above-mentioned purpose of the present utility model, feature and advantage can be become apparent, below in conjunction with accompanying drawing, detailed description of the invention of the present utility model is elaborated.
Elaborate a lot of detail in the following description so that fully understanding this utility model, but this utility model can also adopt other to be different from alternate manner described here to be implemented, therefore this utility model is not by the restriction of following public specific embodiment.
Fig. 1 is the schematic diagram of this utility model electromechanical braking power set.Fig. 2 is the structural representation that in this utility model electromechanical braking power set, active piston and back stay coordinate.
As depicted in figs. 1 and 2, a kind of electromechanical braking power assisting device disclosed in an embodiment of the present utility model, it includes brake pedal mechanism 100, master cylinder assembly 200, dynamo-electric power-assisted unit 300 and electronic control unit 400.Wherein, master cylinder assembly 200 is connected with brake pedal mechanism 100.Electronic control unit 400 is connected to dynamo-electric power-assisted unit 300, brake pedal mechanism 100 and master cylinder assembly 200, for controlling the operation of whole described electromechanical braking power assisting device.
Preferably, master cylinder assembly 200 includes master cylinder housing 201, active piston 203, master cylinder end cap the 202, first master cylinder piston 205 and the second master cylinder piston 206.Master cylinder housing 201 is the hollow type housing of one end open.Master cylinder end cap 202 is arranged on the one end open place of master cylinder housing 201.One end of active piston 203 is stretched in master cylinder housing 201 through master cylinder end cap 202, and the other end is connected with brake pedal mechanism 100 by pedal push rod 204.First master cylinder piston 205 and the second master cylinder piston 206 are successively set in master cylinder housing 201.
It is connected with each other by the first return spring 207 between active piston 203 and the first master cylinder piston 205, forms the first cavity A.It is connected with each other by the second return spring 208 between first master cylinder piston 205 and the second master cylinder piston 206, forms the second cavity B.Second master cylinder piston 206 is connected to the inwall of master cylinder housing 201 by the 3rd return spring 209, forms the 3rd cavity C.
Sealed by sealing member 220 between master cylinder housing 201 and master cylinder end cap 202.In like manner, sealed by sealing member 221 between master cylinder end cap 202 and active piston 203, sealed by sealing member 222 between the first master cylinder piston 205 and master cylinder housing 201, sealed by sealing member 223 between the second master cylinder piston 206 and master cylinder housing 201.Further, in order to spacing to the first master cylinder piston 205, in master cylinder housing 201 inwall, increased inner groovy, in described inner groovy, be equipped with piston circlip 224.The piston external diameter of first master cylinder piston the 205, second master cylinder piston 206 is identical, it is possible to slide axially at master cylinder housing 201 inwall.
Additionally, described electromechanical braking power assisting device also includes fluid reservoir 211, fluid reservoir 211 is connected with the upper end of master cylinder housing 201 by multiple-tubing string.Especially, fluid reservoir 211 is connected with the second cavity B by the first oil pipe 212, is connected with the 3rd cavity C by the second oil pipe 213.
Meanwhile, it is provided with a PTS 214 in active piston 203 and master cylinder end cap 202 junction, PTS 214 is electrically connected with electronic control unit 400, for measuring position and the movement velocity of pedal push rod 204 and active piston 203.
Preferably, dynamo-electric power-assisted unit 300 includes drive mechanism 301, power-assisted push rod 304, boosting piston 303 and servo-cylinder housing 302.Wherein, servo-cylinder housing 302 is connected with drive mechanism 301, and one end of power-assisted push rod 304 is connected with boosting piston 303, and the other end is connected with drive mechanism 301, is moved by power-assisted push rod 304 and makes boosting piston 303 reciprocating in servo-cylinder housing 302.Connected by the 4th return spring 305 between the inwall of boosting piston 303 and servo-cylinder housing 302, form the 4th cavity D.It is additionally provided with a servo-cylinder pressure transducer 307 in the outside of servo-cylinder housing 302, servo-cylinder pressure transducer 307 is electrically connected with electronic control unit 400.Sealed by sealing member 308 between boosting piston 303 and servo-cylinder housing 302.
Between the first fuel feed hole 210 and the second fuel feed hole 306, it is provided with one or two two usual valve closing 216, is electrically connected with electronic control unit 400 by 2/2-way normally close valve 216.
Further, the first oil pipe 212 is connected with the first fuel feed hole 210, and is provided with the first 2/2-way normally open valve 215 between the first oil pipe 212 and the first fuel feed hole 210, is electrically connected with electronic control unit 400 by the first 2/2-way normally open valve 215.
Master cylinder housing 201 offers the first fuel feed hole 210, servo-cylinder housing 302 offers the second fuel feed hole 306, the first fuel feed hole 210 is connected with the second fuel feed hole 306 so that the 4th cavity D and the first cavity A connection.First cavity A is connected with fluid reservoir 211 with the first 2/2-way normally open valve 215 and fluid pressure line by the first oil-in 210, it is also possible to connected with the 4th cavity D by 2/2-way normally close valve 216.
It addition, the outside wall surface of master cylinder housing 201 is additionally provided with the second 2/2-way normally open valve 217 and the 3rd 2/2-way normally open valve 218, the second 2/2-way normally open valve 217 is connected with the second cavity B, and electrically connects with electronic control unit 400.3rd 2/2-way normally open valve 218 is connected with the 3rd cavity C, and electrically connects with electronic control unit 400.Second cavity B and the three cavity C is attached to wheel cylinder by the second 2/2-way normally open valve 217 and the 3rd 2/2-way normally open valve 218.
Master cylinder housing 201 is provided with a master cylinder pressure sensor 219, master cylinder pressure sensor 219 is electrically connected with electronic control unit 400, be used for measuring C chamber hydraulic pressure.Owing to the first cavity A, the second cavity B and the 3rd cavity C have been sealed by the sealing ring of each assembly, a relatively airtight hydraulic cavities can be formed under certain condition.Namely fluid reservoir 211 and master cylinder housing 201 are desirably integrated into one, it would however also be possible to employ Split type structure, are connected by hydraulic hose.
Here brake pedal mechanism 100 includes brake pedal 101 and brake pedal switch 102, brake pedal 101 is connected with pedal push rod 204, brake pedal switch 102 is arranged on brake pedal 101, and brake pedal switch 102 electrically connects with electronic control unit 400.Here adopt hinged between one end and the active piston 206 of pedal push rod 204, be also adopted by hinged between the other end and brake pedal 101, trample at pedal and process allows certain pivot angle.
In this utility model, the drive mechanism 301 of dynamo-electric power-assisted unit 300 does not here draw internal structure in detail, its form is not limited to the reduction gearing mechanisms such as ball-screw, rack-and-pinion, turbine and worm, gear reduction, its motor is also not necessarily limited to the type such as synchronous motor, asynchronous machine, but motor itself needs integrated or band angle position sensor, or installs boosting piston stroke sensor on the power-assisted push rod 304 or boosting piston 303 of servo-cylinder additional for measuring the position of boosting piston.Boosting piston 303 in servo-cylinder is worked in coordination with boosting piston sealing ring 308 and is constituted the 4th cavity D with servo-cylinder housing 302, has power-assisted piston return spring 305 being just adapted to assist in boosting piston 303 times in it.
Electronic control unit 400 is mainly used in being responsible for other signals of the reception signal of telecommunication from brake pedal switch 102, PTS 214, master cylinder pressure sensor 219, power-assist cylinder pressure transducer 307 and assist motor angle position sensor or boosting piston position sensor (not shown) and car load VCU offer herein, judges that each valve and assist motor send execution instruction completes a series of actions further according to analyzing subsequently.Owing to the first 2/2-way normally open valve 215 is normally open valve, 2/2-way normally close valve 216 is normally close valve, therefore can loosen the brake 101 need not brake time (electronic control unit 400, to the first 2/2-way normally open valve 215 power-off, powers on to 2/2-way normally close valve 216) active piston 203, boosting piston 303 in return process, the first cavity A and the four cavity D is supplemented brake fluid in time.
Structure according to above-mentioned this utility model electromechanical braking power assisting device, its operation principle is as follows:
Normal brake application:
1) without regeneration brake system operating mode
Driver's brake pedal 101, brake pedal switch 102 is opened, and active piston 203 moves forward, and promotes first master cylinder piston the 205, second return spring the 208, second master cylinder piston 206 by the first return spring 207, and dynamo-electric force aid system 300 enters duty.When, after the first master cylinder piston 205 and second master cylinder piston 206 fuel feed hole by fluid reservoir 211 and first oil inlet pipe the 212, second oil inlet pipe 213, the second cavity B and the three cavity C builds pressure can form a hydraulic pressure P1.PTS 214 measures pedal travel and speed, signal is passed to electronic control unit 400, electronic control unit 400 is in conjunction with the signal such as pressure signal and assist motor angle position of master cylinder pressure sensor 219, power-assist cylinder pressure transducer 307, analyze transmission power-assisted instruction after judging and do the power-assisted (the size needs coupling of power-assisted) rotating forward output and being suitable for assist motor, promote power-assisted push rod 304 to move forward, drive boosting piston 303 to compress the brake fluid in the 4th return spring 305 and the 4th cavity D.Simultaneously, electronic control unit 400 powers on to the first 2/2-way normally open valve 215 and 2/2-way normally close valve 216,2/2-way normally close valve 216 is opened, first 2/2-way normally open valve 215 is closed, in 4th cavity D, the brake fluid of (in the 4th cavity D, hydraulic pressure is P3) enters the first cavity A through 2/2-way normally close valve 216, and in the first cavity A, hydraulic pressure is P2.
Active piston 203 is at the piston compression area of the first cavity A endAccording to equalising torque, there is FStep on=S2 × P2+k2 × L2, (FStep onFor brake pedal force, i.e. the input power of active piston 203, k2 is the rigidity of active piston return spring, and L2 is the decrement of active piston return spring).Therefore, brake pedal force and servo-cylinder pressure P 2, active piston 203 effective outer diameter D 2 square, active piston return spring rigidity k2 is directly proportional.
The spring force of the first cavity A, the hydraulic pressure of the second cavity B and two return springs that the first master cylinder piston 205 is subject to, the identical P1 that is of hydraulic pressure in second cavity B, the 3rd cavity C, the spring rate of k1, L1 respectively the first master cylinder piston 205 return spring and decrement, D1 is effective external diameter of the first master cylinder piston, has according to equalising torque:
S1 × P1+k1 × L1=S1 × P2+k2 × L2, here the first master cylinder piston lifting surface area
P1=(S1 × P2+k2 × L2-K1 × L1)/S1
So, P1 and P2, K2 are directly proportional, and are inversely proportional to K1, L1.
Open at 2/2-way normally close valve 216, under the first 2/2-way normally open valve 215 closed mode, as being left out the pressure loss of valve system and hydraulic channel, then it is believed that P2=P3.
For servo-cylinder, the lifting surface area of its boosting pistonP3 is the hydraulic pressure in servo-cylinder D chamber, the spring rate of k3, L3 respectively boosting piston return spring 306 and decrement, and D3 is effective external diameter of boosting piston.
F power-assisted=S3 × P3+k3 × L3,
P3=(F power-assisted-k3 × L3)/S3, P3 are directly proportional to assist motor power-assisted, are inversely proportional to K3, L3, S3.
Along with continuing to increase of assist motor power-assisted, the hydraulic pressure P3 in the 4th cavity D constantly rises, and the pressure P 2 in the first cavity A rises therewith, and pedal force also follows linear rise.Pressure P 1 in second cavity B and the three cavity C together rises also with pressure P2 in the first cavity A simultaneously, and then drives wheel cylinder to carry out frictional damping.
Through above-mentioned analysis, FStep onElectronic control unit 400 (ECU) can being passed through and control program, adjusting the size of assist motor power output, thus exporting different assist characteristic curves.
2) regenerative brake coordination operating mode
If there is regenerative braking, then when driver's brake pedal 101 starts, ECU will power on to second 2/2-way normally open valve the 217, the 3rd 2/2-way normally open valve the 218, first 2/2-way normally open valve 215 and 2/2-way normally close valve 216, close master cylinder to the passage of wheel cylinder and fluid reservoir 211, open the passage of the first cavity A to the 4th cavity D.When master cylinder two-piston by after fluid reservoir 211 and the first oil inlet pipe 212 and the second oil inlet pipe 213 fuel feed hole, the second cavity B and the three cavity C forms a completely enclosed hydraulic cavities, it is possible to regard a rigid body as.First master cylinder piston 205 and the second master cylinder piston 206 no longer move, and frictional damping is 0.Brake force is provided by the power drive motor reversal of regeneration brake system.First cavity A and the four cavity D-shaped becomes an entirety, pedal force foregoing " without regeneration brake system operating mode ".But now, if boosting piston 303 remains stationary as, then the hydraulic pressure change of the first cavity A and the four cavity D enters the change generation of the first cavity A pressure formed mainly by active piston.Control by electronic control unit 400 (ECU), it is also possible to according to pedal force demand, assist motor is carried out forward or reverse and perform boosting or blood pressure lowering action, thus exporting different assist characteristic curves.
When needing friction brake force to assist when the regenerative braking force deficiency produced by drive motor, electronic control unit 400 (ECU) can cut off the power supply of the second 2/2-way normally open valve the 217, the 3rd 2/2-way normally open valve 218 according to the instruction of car load VCU, connects the hydraulic channel of master cylinder and wheel cylinder.Meanwhile, keep powering to the first 2/2-way normally open valve 215 and 2/2-way normally close valve 216, make assist motor rotate forward power-assisted and produce certain friction brake force and regenerative braking force composition composite braking.
3) power-assisted lost efficacy:
When dynamo-electric power-assisted unit breaks down (as stuck in burn-down of electric motor, drive mechanism, servo-cylinder leakage), electronic control unit 400 (ECU) is by servo-cylinder pressure transducer 307 signal discriminatory analysis such as grade, for 2/2-way normally close valve 216 power-off, close the first cavity A and the four cavity D passage, first 2/2-way normally open valve 215 powers on, and disconnects the first cavity A and fluid reservoir 211 passage.And rely on hydraulic pressure that active piston 203 reach produces and the first return spring 207 to compress back segment and push directly on the first master cylinder piston 205 and carry out conventional manual braking.
Backward again, if the first 2/2-way normally open valve 215 also lost efficacy, then still can utilize active piston 203 to push directly on the first master cylinder piston 205 after compressing spring and carry out conventional manual braking, meet acting urgent braking system demand.
4) Braking mode:
When car load VCU (Fig. 1 is not drawn into) sends braking instruction to the electronic control unit 400 (ECU) of electromechanical braking servomechanism, ECU will power on to the first 2/2-way normally open valve 215 and 2/2-way normally close valve 216, close the first cavity A and lead to the passage of fluid reservoir 211, open the passage of the first cavity A to second cavity D, send instruction to assist motor.Assist motor rotates forward and promotes power-assisted push rod 304 and boosting piston 303 is that the 4th cavity D and the first cavity A applies hydraulic pressure and liquid stream, and then promotes the first master cylinder piston 205 and the second master cylinder piston 206 to produce frictional damping for wheel cylinder pressurization.
The structure of active piston 203 as shown in Figure 1, under this kind of operating mode, owing to active piston 203 does not move forward, so brake pedal 101 remains stationary as.
Certainly, active piston 203 can also be designed to structure as shown in Figure 2.Master cylinder assembly 200 also includes back stay 225, is connected with the first master cylinder piston 205 one end of back stay 225, and the other end is connected with active piston 203.Specifically, it is possible to offering a chute 226 in active piston 203, the other end of back stay 225 is slidably installed in chute 226.
Back stay 225 and the first master cylinder piston 205 are for being rigidly connected, and it can slide axially in the chute 226 within active piston 203 and have location.So, when the first master cylinder piston 205 moves forward, it is possible to pull active piston 205 together to move forward.So, the synchronization-moving function of brake pedal 101 can just be realized when Braking mode.
The Braking mode function of electromechanical braking servomechanism of this patent design is that automatically or semi-automatically driving technology provides the actuator of Braking mode (ECU in this patent mechanism does not possess the function judging and actively sending automatic braking instruction, the instruction that simply passive reception VCU sends.Certainly, if electronic control unit 400 itself do enough powerful, be can other sensor integrated realize active functions), be capable of corresponding Braking mode function with other system integration.
The assist motor related in this utility model is not limited to synchronous motor, it can be any direct-drive motor, but it is integrated or carry angle position sensor or there is no angle position sensor on its motor but it also may to increase boosting piston position sensor at servo-cylinder position for measuring the position of boosting piston.
In sum, this utility model electromechanical braking power assisting device is mainly used in the automobile not enough or unstable without vacuum source or vacuum source or other motor vehicles, mainly includes EV (pure electric automobile), HEV (mixed electrical automobile), has the vehicle of automatic Pilot or semi-automatic driving function, assembles the vehicle etc. of high-performance enginer (vacuum is not enough).
This utility model electromechanical braking power assisting device can collectively form brake energy recovering system (that is to say composite braking system) with other electronic product (such as drive motor, battery etc.) is integrated on electric automobile (EV) or hybrid vehicle (HEV), realize coordination and the control of regenerative braking easily, be greatly improved the regenerating braking energy response rate.It addition, this utility model mechanism is also devised with power-assisted inefficacy standby system, it is possible to be applied directly on brake master cylinder piston by brake pedal and complete hydraulic frictional braking, safe and reliable.Additionally, due to it adopts ECU to control assist motor and each electronic valve, it is possible to can be integrated better with other electric-control system, it is possible to better realize automatically controlling and Function for Automatic Pilot of vehicle more easily.Wherein in the combination of master cylinder, fluid reservoir, ECU, servo-cylinder and motor and drive mechanism thereof, degree of freedom is high, namely can integrated also can be each independent, and time integrated, the degree of freedom of layout design is high.
Although the foregoing describing detailed description of the invention of the present utility model, it will be appreciated by those of skill in the art that these are merely illustrative of, protection domain of the present utility model is defined by the appended claims.Those skilled in the art is under the premise without departing substantially from principle of the present utility model and essence, it is possible to these embodiments are made various changes or modifications, but these change and amendment each falls within protection domain of the present utility model.

Claims (14)

1. an electromechanical braking power assisting device, it is characterised in that described electromechanical braking power assisting device includes:
Brake pedal mechanism;
Master cylinder assembly, described master cylinder assembly is connected with described brake pedal mechanism;
Dynamo-electric power-assisted unit and electronic control unit, described electronic control unit is connected to described dynamo-electric power-assisted unit, described brake pedal mechanism and described master cylinder assembly, for controlling the operation of whole described electromechanical braking power assisting device.
2. electromechanical braking power assisting device as claimed in claim 1, it is characterised in that described master cylinder assembly includes:
Master cylinder housing, for the hollow type housing of one end open;
Active piston and master cylinder end cap, described master cylinder end cap is arranged on the one end open place of described master cylinder housing, one end of described active piston is stretched in described brake master cylinder housing body through described master cylinder end cap, and the other end is connected with described brake pedal mechanism by pedal push rod;
First master cylinder piston and the second master cylinder piston, be successively set in described brake master cylinder housing body;
It is connected with each other by the first return spring between described active piston and described first master cylinder piston, forms the first cavity;It is connected with each other by the second return spring between described first master cylinder piston and described second master cylinder piston, forms the second cavity;Described second master cylinder piston is connected to the inwall of described master cylinder housing by the 3rd return spring, forms the 3rd cavity.
3. electromechanical braking power assisting device as claimed in claim 2, it is characterised in that described electromechanical braking power assisting device also includes fluid reservoir, and described fluid reservoir is connected with the upper end of described master cylinder housing by multiple-tubing string.
4. electromechanical braking power assisting device as claimed in claim 3, it is characterised in that described fluid reservoir is connected with described second cavity by the first oil pipe, is connected with described 3rd cavity by the second oil pipe.
5. electromechanical braking power assisting device as claimed in claim 2, it is characterised in that described active piston and described master cylinder end cap junction are provided with a PTS, and described PTS electrically connects with described electronic control unit.
6. electromechanical braking power assisting device as claimed in claim 4, it is characterized in that, described dynamo-electric power-assisted unit includes drive mechanism, power-assisted push rod, boosting piston and servo-cylinder housing, described servo-cylinder housing is connected with described drive mechanism, one end of described power-assisted push rod is connected with described boosting piston, the other end is connected with described drive mechanism, by described power-assisted pushrod movement make described boosting piston in described servo-cylinder housing reciprocating.
7. electromechanical braking power assisting device as claimed in claim 6, it is characterised in that connected by the 4th return spring between the inwall of described boosting piston and described servo-cylinder housing, form the 4th cavity.
8. electromechanical braking power assisting device as claimed in claim 7, it is characterised in that described servo-cylinder housing be provided externally with a servo-cylinder pressure transducer, described servo-cylinder pressure transducer electrically connects with described electronic control unit.
9. electromechanical braking power assisting device as claimed in claim 7, it is characterized in that, described master cylinder housing offers the first fuel feed hole, described servo-cylinder housing offers the second fuel feed hole, described first fuel feed hole is connected with described second fuel feed hole so that described 4th cavity connects with described first cavity;
Between the first fuel feed hole and described second fuel feed hole, it is provided with one or two two usual valve closing, is electrically connected with described electronic control unit by described 2/2-way normally close valve.
10. electromechanical braking power assisting device as claimed in claim 9, it is characterized in that, described first oil pipe is connected with described first fuel feed hole, and between described first oil pipe and described first fuel feed hole, it is provided with the first 2/2-way normally open valve, electrically connected with described electronic control unit by described first 2/2-way normally open valve.
11. electromechanical braking power assisting device as claimed in claim 2, it is characterized in that, the outside wall surface of described master cylinder housing is additionally provided with the second 2/2-way normally open valve and the 3rd 2/2-way normally open valve, described second 2/2-way normally open valve connects with described second cavity, and electrically connects with described electronic control unit;Described 3rd 2/2-way normally open valve connects with described 3rd cavity, and electrically connects with described electronic control unit.
12. electromechanical braking power assisting device as claimed in claim 2, it is characterised in that described master cylinder housing is provided with a master cylinder pressure sensor, and described master cylinder pressure sensor electrically connects with described electronic control unit.
13. electromechanical braking power assisting device as claimed in claim 2, it is characterized in that, described master cylinder assembly also includes back stay, one end of described back stay is connected with described first master cylinder piston, the other end is connected with described active piston, offering a chute in described active piston, the other end of described back stay is slidably installed in described chute.
14. the electromechanical braking power assisting device as described in claim 2-13 any one, it is characterized in that, described brake pedal mechanism includes brake pedal and brake pedal switch, described brake pedal is connected with described pedal push rod, described brake pedal switch is arranged on described brake pedal, and described brake pedal switch electrically connects with described electronic control unit.
CN201521011405.1U 2015-12-08 2015-12-08 Electromechanical braking booster unit Expired - Fee Related CN205365566U (en)

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Application Number Priority Date Filing Date Title
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108501915A (en) * 2018-04-25 2018-09-07 罗德凯 A kind of vane type brake system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108501915A (en) * 2018-04-25 2018-09-07 罗德凯 A kind of vane type brake system
CN108501915B (en) * 2018-04-25 2021-02-02 罗德凯 Blade type brake system

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