CN110077374A - A kind of mixing double-circuit braking system and braking method with multiple-working mode - Google Patents
A kind of mixing double-circuit braking system and braking method with multiple-working mode Download PDFInfo
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- CN110077374A CN110077374A CN201910325247.3A CN201910325247A CN110077374A CN 110077374 A CN110077374 A CN 110077374A CN 201910325247 A CN201910325247 A CN 201910325247A CN 110077374 A CN110077374 A CN 110077374A
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- 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
- B60T13/58—Combined or convertible systems
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
- B60T13/74—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with electrical assistance or drive
- B60T13/745—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with electrical assistance or drive acting on a hydraulic system, e.g. a master cylinder
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T17/00—Component parts, details, or accessories of power brake systems not covered by groups B60T8/00, B60T13/00 or B60T15/00, or presenting other characteristic features
- B60T17/18—Safety devices; Monitoring
- B60T17/22—Devices for monitoring or checking brake systems; Signal devices
-
- 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
- B60T2260/00—Interaction of vehicle brake system with other systems
- B60T2260/02—Active Steering, Steer-by-Wire
-
- 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
- B60T2270/00—Further aspects of brake control systems not otherwise provided for
- B60T2270/40—Failsafe aspects of brake control systems
- B60T2270/402—Back-up
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T2270/00—Further aspects of brake control systems not otherwise provided for
- B60T2270/40—Failsafe aspects of brake control systems
- B60T2270/404—Brake-by-wire or X-by-wire failsafe
Abstract
The present invention relates to a kind of mixing double-circuit braking system and braking method with multiple-working mode, the braking system includes: manual braking circuit, the manual braking circuit includes the manual cylinder coupled with brake pedal, the manual cylinder is coupled by brake piping with the second electric cylinder, and second electric cylinder is electrically connected with brake monitor and is coupled by brake piping with the first brake group；Brake-by-wire circuit, the brake-by-wire circuit includes the first electric cylinder coupled with second brake group, the brake monitor coupled with first electric cylinder couples with pedal travel sensor, the pedal travel sensor couples with manual cylinder, the present invention has the advantages that braking response is fast, brake pedal feel and brake direction steady are good, ground attachment utilization rate is high；System structure is simple, at low cost；High reliablity, fail-safe ability are strong.
Description
Technical field
The invention belongs to brake system of car technical fields, are a kind of comprising manual braking circuit and line traffic control specifically
The mixing double-circuit braking system with multiple-working mode of brake circuit.
Background technique
According to the division of international automobile Association of Engineers, intelligent driving automobile is divided into Pyatyi, that is, drives auxiliary (1
Grade), partial automation (2 grades), automation of having ready conditions (3 grades), increasingly automated (4 grades) and full automation (5 grades).With regard to system
For dynamic system, the intelligent driving of each rank requires that automobile has autonomous braking function, i.e., does not manipulate braking in driver
All or part of wheel is implemented to brake in the case where control device.Can implement at present mainly include from the device of main brake
Electro-hydraulic brake (EHB), electric mechanical braking (EMB), the electronic stability control hydraulic control unit of (ESC) and all kinds of
Electro-hydraulic servo braking system etc..
It is the new-energy automobiles such as electric car and fuel cell car than may replace fuel-engined vehicle.In order to increase
The course continuation mileage of new-energy automobile, Brake energy recovery are generally used.However, existing braking system and being unsatisfactory for Brake Energy
The needs for measuring recycling, i.e., can not solve the contradiction between brake pedal feel and Brake energy recovery.The reason is that existing
Braking system does not decouple completely.
Therefore, existing braking system has no longer adapted to intelligent automobile and the braking of new-energy automobile needs, and must propose new
Type braking system is to meet its requirement.
Summary of the invention
The purpose of the present invention is to propose to one kind to have a variety of work such as brake-by-wire, power brake and manpower backup braking
The double-circuit braking system of mode to meet the braking needs of intelligent automobile, while supporting the braking energy of new-energy automobile to return
It receives, i.e., realizes that Brake energy recovery maximizes under the premise of not influencing brake pedal feel.
The present invention provides a kind of mixing double-circuit braking system with multiple-working mode characterized by comprising
Manual braking circuit, the manual braking circuit include the manual cylinder coupled with brake pedal, the manual cylinder
Drainage hole is coupled by brake piping with the oil inlet of the second electric cylinder, and second electric cylinder is electrically connected with brake monitor
And coupled by brake piping with the first brake group；
Brake-by-wire circuit, it includes the first electric cylinder coupled with second brake group in the brake-by-wire circuit, with
The brake monitor of the first electric cylinder connection also couples with pedal travel sensor, the pedal travel sensor
To detect the signal of the stroke of the brake pedal；
Second electric cylinder includes:
Cylinder body；The motor of motor, second electric cylinder is slided by pushing meanss band piston；Described second is electronic
Through-hole is offered among the piston of cylinder, the catch bar activity is across the through-hole and the shape the inner sidewall of the through-hole
At the oil passage passed through for oil liquid, the catch bar is respectively arranged with and the piston phase in the two sides for being located at the through-hole
Cooperate to open and close the first auxiliary section of the oil passage and the second auxiliary section；The catch bar passes through the through-hole
End and second electric cylinder cylinder body between be provided with return elastic component；
The cylinder body of second electric cylinder opens up the oil inlet and oil outlet in the two sides of the piston respectively.
Further, first auxiliary section be to close to second electric cylinder piston direction it is tapered first
Circular conical surface, second auxiliary section are to couple gradually to the direction of the piston far from second electric cylinder with return elastic component
The second circular conical surface expanded；The piston of second electric cylinder is respectively equipped with and described first at through-hole both ends open edge
The third circular conical surface that circular conical surface matches and the 4th circular conical surface with second circular cone towards cooperation；And described first
When circular conical surface is bonded with the third circular conical surface, second circular conical surface is separately arranged with the 4th circular conical surface；Described
When two circular conical surfaces are bonded with the 4th circular conical surface, first circular conical surface is separately arranged with the third circular conical surface.
Further, the catch bar is equipped with annular bottom surface between first conical surface and second conical surface, described
The diameter of annular bottom surface is less than the internal diameter of the through-hole.
Further, the pushing meanss are ball wire bar pair, and the ball wire bar pair includes by second electric cylinder
Motor-driven nut and with the nut cooperation the catch bar.
Further, first electric cylinder includes:
Shell；Cylinder body is fixedly connected with the casing；
Motor, the motor of first electric cylinder are fixed on the shell of first electric cylinder and with setting described
Ball wire bar pair connection in first electronic cylinder housing, the ball wire bar pair include being driven by the motor of first electric cylinder
Dynamic rolled thread nut and the screw rod with rolled thread nut cooperation；The screw rod and the cylinder body that first electric cylinder is set
Interior piston is fixedly connected, and is provided with return elastic component between the inner wall of the cylinder body of the piston and first electric cylinder,
The cylinder body of first electric cylinder offers electric cylinder compensation hole, electric cylinder confession fluid apertures and electric cylinder drainage hole；
Leather cup is installed on the piston of first electric cylinder, it is described when the return elastic component is in preloading condition
Leather cup is between the electric cylinder compensation hole and the electric cylinder confession fluid apertures.
Further, the inside of the shell of first electric cylinder is cylindrical hollow configuration, and internal includes being connected
And the first cylindrical cavity, the second cylindrical cavity and third cylindrical cavity that diameter is sequentially increased, first cylinder
It is provided with closing surface between shape cavity and the second cylindrical cavity, offers on the closing surface and leads to for what the screw rod passed through
Hole；The shaft shoulder is formed between second cylindrical cavity and the third cylindrical cavity, the rolled thread nut is rotationally
It is set in the third cylindrical cavity, and one end of the rolled thread nut is fixed on the shaft shoulder by bearing；Described
The shell of one electric cylinder extends axially outwardly to form boss close to one end of the piston, the boss and first electricity
The opening sealing of dynamic cylinder cylinder body is fixedly connected with merging.
Further, the screw rod is equipped with guide groove, and the guiding is inserted into the guide pin one end being fixed in the shell
In slot.
Further, the manual cylinder includes:
End cap, the end cap of the manual cylinder is interior to be equipped with rack gear, and the rack gear passes through the push rod being fixed thereon and steps on braking
There is sawtooth to engage with sensor gear for plate connection, the rack gear, and the pedal travel sensor is for detecting the sensor
The rotation of gear is provided with return elastic component between the rack gear and the manual cylinder cylinder body；
Manual cylinder cylinder body, the interior manual cylinder cylinder body includes joining secondary piston and rear piston, piston and the institute afterwards
It states and is provided with one section of idle stroke between rack gear；Preceding leather cup is provided on the secondary piston, it is described under the precompression of elastic component
Preceding leather cup is provided with the drainage hole on the manual cylinder cylinder body between confession fluid apertures and compensation hole.
Further, the side of piston towards the rack gear offers jack after described, have on the rack gear with it is described
Jack plugs the top of cooperation；The rack gear is described to support under the precompression effect of the feel spring of the manual cylinder
There are the idle strokes between the end face in portion and the bottom surface of the jack.
Automobile is carried out using the mixing double-circuit braking system with multiple-working mode the present invention discloses a kind of
The braking method of braking, comprising:
Brake-by-wire mode, braking process are as follows: when driver steps on pedal 1, so that the idle stroke S reduces but big
When zero, the brake monitor 7 detects the pedal travel signal of the pedal travel sensor 9 and controls described first
Electric cylinder 5 and second electric cylinder 8 respectively brake the second brake and the first brake group；
Power brake mode, braking process are as follows: when driver steps on pedal 1, so that the idle stroke S is reduced to zero
When, the manual cylinder 4 exports the second electric cylinder 8 described in brake fluid to 8 power-assisted of the second electric cylinder to first brake
It is braked, at the same time, the brake monitor 7 detects the pedal travel signal of the pedal travel sensor 9 and controls
First electric cylinder 5 and second electric cylinder 8 are made respectively to the second brake and the first brake group
It is braked；
Fail-safe mode, braking process are as follows: when driver steps on pedal 1, if the brake-by-wire circuit is lost
Effect or manual braking's partial failure, the brake monitor 7 control another normal circuit and are braked；
Failure backup manual braking's mode, braking process are as follows: when driver steps on pedal 1, if the line traffic control
Dynamic partial failure and manual braking circuit electric cylinder fail simultaneously, and the manual cylinder 4 exports brake fluid to second electricity
Dynamic cylinder 8 pushes the piston 813 of second electric cylinder 8, and the brake fluid of second electric cylinder 8 is exported to the first system
Dynamic device group is braked.
The present invention is using the mixing double-circuit braking system with multiple-working mode, when automobile brake, just
Often work in the case where can be realized brake-by-wire mode, as long as and the idle stroke do not completely eliminate, pedal force would not
Passing to piston component, i.e., brake pedal and manual cylinder and each wheel drag are in decoupled state, by the idle stroke,
It may be implemented to realize that Brake energy recovery maximizes under the premise of not influencing brake pedal feel；Needing larger brake force
Shi Qidong power brake mode can start fail-safe braking mode and when braking when the failure of one of brake circuit
Controller is provided with failure backup manual braking's mode to meet an urgent need when failing, the mixing with multiple-working mode is double
Brake system response in circuit is fast, brake pedal feel and brake direction steady are good, ground attachment utilization rate is high；System
Structure is simple, at low cost；High reliablity, fail-safe ability are strong.
Detailed description of the invention
Fig. 1 is the mixing double-circuit braking system structural schematic diagram with multiple-working mode；
Fig. 2 is the manual cylinder and its manipulation device structural schematic diagram for mixing double-circuit braking system；
Fig. 3 is the first electric cylinder structural schematic diagram for mixing double-circuit braking system；
Fig. 4 is the second electric cylinder structural schematic diagram for mixing double-circuit braking system；
Fig. 5 is enlarged drawing at A in Fig. 4.
Label is described as follows in figure:
1- brake pedal；2- supporting pin；3- braking light switch；4- manual cylinder；401- push rod；402- locking nut；403-
Rack gear；404- end cap；405- gear；406- feel spring；407- spacer pin；Piston after 408-；Leather cup after 409-；410- people
Power cylinder cylinder body；411- confession fluid apertures；412- compensation hole；413- piston reset elastic component；414- secondary piston；Leather cup before 415-；416-
Drainage hole；417- fluid reservoir；Top 418；Jack 419；S- idle stroke；The first electric cylinder of 5-；501- motor；502- shaft coupling
Device；503- rolled thread nut；504- bearing；505- retaining ring；506- steel ball；507- screw rod；508- shell；509-O shape circle；510-
Guide pin；511- sealing ring；512- piston；513- leather cup；514- bolt；515- electric cylinder fluid reservoir；516- return spring；
517- cylinder body；6- power supply；7- brake monitor；The second electric cylinder of 8-；801- motor；802- shaft coupling；803- retaining ring；
804- nut；805- bearing；806- catch bar；807-O shape circle；808- oil inlet；809- oil suction chamber；810- guide pin；811-
Sealing ring；812- leather cup；813- piston；814- oil outlet；815- return elastic component；816- oil outlet chamber；817- cylinder body；818-
Shell；The first auxiliary section V1-；The second auxiliary section V2-；V3- third circular conical surface；The 4th circular conical surface of V4-；V5- annular bottom surface；10-
Left front brake；9- pedal travel sensor；11- right front brake；The right rear brake of 12-；The left back brake of 13-；A- low pressure
Chamber；B- electric cylinder confession fluid apertures；C- electric cylinder compensation hole；D- high pressure chest；E- electric cylinder drainage hole.
Specific embodiment
The present invention will be further explained below with reference to the attached drawings.
Referring to figs. 1 to Fig. 5, the present invention has the mixing double-circuit braking system of multiple-working mode, including brake pedal
1, supporting pin 2, braking light switch 3, manual cylinder 4, the first electric cylinder 5, power supply 6, brake monitor 7, the second electric cylinder 8, pedal
Stroke sensor 9, left front brake 10, right front brake 11, right rear brake 12, left back brake 13 and signal
Line, power supply line and brake piping；Wherein, wheel cylinder is contained at least one in each brake；
Manual braking circuit includes the manual cylinder 4 coupled with brake pedal 1, and the drainage hole 416 of the manual cylinder 4 passes through
Brake piping couples with the oil inlet 808 of the second electric cylinder 8, second electric cylinder 8 be electrically connected with brake monitor 7 and
Coupled by brake piping with the first brake group；
Brake-by-wire circuit, it includes the first electric cylinder 5 coupled with second brake group in the brake-by-wire circuit,
The brake monitor 7 coupled with first electric cylinder 5 also couples with pedal travel sensor 9 and power supply 6, described
The signal of stroke of the pedal travel sensor 9 to detect the brake pedal 1；The brake monitor 7 also with it is other automatically controlled
System connects the brake signal to detect other positions of vehicle.
In the present embodiment, the first brake group includes left back brake 13 and right rear brake 12, second brake group
Including right front brake 11 and left front brake 10, in other embodiments, the first brake group can also include left front braking
Device 10 and right rear brake 12, left back brake 13 and right front brake 11, left front brake 10 and right front brake 11, a left side
Front brake 10 and left back brake 12 and right front brake 11 and right rear brake 12.
Manual cylinder 4 as shown in Figure 2 includes push rod 401, rack gear 403, locking nut 402, end cap 404, sensor gear
405, feel spring 406, spacer pin 407, rear piston 408, rear leather cup 409, manual cylinder cylinder body 410, confession fluid apertures 411, compensation hole
412, piston reset elastic component 413, secondary piston 414, preceding leather cup 415, drainage hole 416 and fluid reservoir 417；Wherein, rear piston
408 front end narrower portions are provided with external screw thread, and the screwed hole of centre for being screwed into secondary piston 414 forms piston component later and is arranged
In 410 inner hole of manual cylinder cylinder body；408 right side of piston is provided with a jack 419 afterwards, and rack gear 403 is in feel spring 406
It under precompression effect, abuts against on end cap 404, there is the cylindrical top for plugging cooperation with jack 419 on rack gear 403
There is one section of idle stroke S in 418, with the jack 419 of rear piston 408, the jack 419 is cylindrical hole, the cylindrical hole
Bottom surface is the dome shape of indent, and the top 418 is cylinder, and end face is the dome shape of protrusion.
Piston reset elastic component 413 is provided between 410 front end face of secondary piston 414 and cylinder body；The casing wall edge of manual cylinder cylinder body
Radial direction is provided with compensation hole 412, confession fluid apertures 411 and drainage hole 416；Afterwards in the middle part of 414 outer circle of 408 middle section outer circle of piston and secondary piston
Annular groove is respectively arranged with rear leather cup 409 and preceding leather cup 414, the rear piston 408 under the effect of 413 precompression of piston reset elastic component
One end face pressure be against on the spacer pin 407 being mounted in 410 radial hole of cylinder body by tight fit, and 415 axis of leather cup before making
To between compensation hole 412 and confession fluid apertures 411；Rack gear 403 is located in the centre bore of end cap 404, side tooth punching and same
The gear 405 being supported in end cap 404 engages；Gear 405 turns around the rotation of own axes through the output of pedal travel sensor 3
Angle signal；4 working chamber of manual cylinder is connected to by brake piping with the first electric cylinder 5 by drainage hole 416.
First electric cylinder 5 includes motor 501, shaft coupling 502, rolled thread nut 503, screw rod 507, steel ball 506, axis
Hold 504, retaining ring 505, the first electronic cylinder housing 508, O shape circle 509, guide pin 510, sealing ring 511, piston 512, bolt
514, cylinder body 517, return spring 516, leather cup 513, electric cylinder fluid reservoir 515.
The inside of the first electronic cylinder housing 508 is cylindrical hollow configuration, the first circle being sequentially increased including internal diameter
Cylinder, the second cylindrical surface and third cylindrical surface；Inner wall between first cylindrical surface and the second cylindrical surface prolongs radially inward
It stretches to form the partition with centre bore, the third cylindrical surface is installed close to the formation shaft shoulder, the retaining ring 505 at the second cylindrical surface
On the third cylindrical surface；The first electronic cylinder housing 508 extends axially outwardly to be formed close to one end of piston 512
Boss；The casing wall of the first electric cylinder cylinder body 517 radially have electric cylinder compensation hole C, electric cylinder confession fluid apertures B and
Electric cylinder drainage hole E.
The motor 501 of first electric cylinder 5 is coupled with rolled thread nut 503 by shaft coupling 502；By ball nut
503, the ball wire bar pair that screw rod 507 and steel ball 506 are constituted is supported in shell 508 by a pair of bearings 504；First electric cylinder 5
Cylinder body 517 and shell 508 couple using bolt (not shown), sealing ring 511 is pressed at joint surface after fastening
Sealing function；It is fixed in the guide groove of 510 one end of guide pin insertion screw rod 507 in 508 hole of shell of the first electric cylinder 5,
So that screw rod 507 can only cannot be around axial rotation along axial translation；The piston being fixedly connected by bolt 514 and screw rod 507
512 are located in the first electric cylinder cylinder body 517, and 507 guide groove of screw rod is close to piston under the effect of 516 precompression of return spring
512 one end are pressed against on guide pin 510, and the limit is so that the leather cup 513 being mounted in the middle part of 512 outer circle of piston in annular groove is axial
Between electric cylinder compensation hole C and electric cylinder confession fluid apertures B；Electric cylinder working chamber where return spring 516 is that electric cylinder is high
Chamber D is pressed, and the other side electric cylinder working chamber of piston 512 is electric cylinder low pressure chamber A；Electric cylinder compensation hole when not stepping on pedal
C is connected to electric cylinder high pressure chest D and electric cylinder fluid reservoir 515, and electric cylinder confession fluid apertures B is connected to electric cylinder low pressure chamber A and electric cylinder
Fluid reservoir 515；Electric cylinder drainage hole E connects electric cylinder high pressure chest D by the wheel cylinder of brake piping and two front wheel brakes
It is logical；Retaining ring 505 is used for 504 axially position of bearing and limits the axial movement of rolled thread nut 503；O-ring is mounted on shell 508
It seals in inner groove at partition.
In shown second electric cylinder structure chart, the inside of shell 818 is cylindrical hollow configuration, including internal diameter successively increases
Big the first cylindrical surface, the second cylindrical surface and third cylindrical surface has a radial oil inlet 808, the first circle on the first cylindrical surface
The radially inwardly extending formation first boss of inner wall between cylinder and the second cylindrical surface, third cylindrical surface is close to the second cylinder
The shaft shoulder is formed at face, retaining ring 803 is mounted on the third cylindrical surface；Second electronic 818 outside of cylinder housing is close to left
Endface radially forms second boss；The motor 801 of second electric cylinder 8 is mounted on the second electronic cylinder housing 818
Right side, output shaft are coupled by shaft coupling 802 with nut 804；The ball wire being made of nut 804 and catch bar 806 etc.
Bar assembly is supported on shell by two bearings 805, and passes through 803 axially position of the shaft shoulder and retaining ring of shell inner hole；It pushes away
Lever 806 is equipped with guide groove, limits its rotation by guide pin 810, so the operating mode of the ball screw assembly is nut
804 rotations, catch bar 806 are translatable；The catch bar is respectively arranged in the two sides for being located at the through-hole to match with the piston
It closes to open and close the first auxiliary section V4 and the second auxiliary section V2 of the oil passage；First auxiliary section is to leaning on
The first tapered circular conical surface of the direction of the piston 813 of nearly second electric cylinder 8, the second auxiliary section V2 is to far from institute
State the second circular conical surface of the flaring that the direction of the piston 813 of the second electric cylinder 8 couples with return elastic component；Described second is electronic
The piston of cylinder is respectively equipped with the third circular conical surface V3 matched with first circular conical surface at through-hole both ends open edge
And the 4th circular conical surface V4 with second circular cone towards cooperation；And first circular conical surface and the third circular conical surface
When V3 is bonded, second circular conical surface is separately arranged with the 4th circular conical surface V4；Second circular conical surface and the described 4th
When circular conical surface V4 is bonded, first circular conical surface is separately arranged with the third circular conical surface V3.
Second electric cylinder cylinder body 817 is the hollow cylinder of right-end openings, and right side and second boss sealing connect
It connects, is provided with oil outlet 814 at left side in 817 lower part of the second electric cylinder cylinder body；Leather cup with one-way sealing effect
812 are installed in the annular groove of 813 excircle of piston, and are supported in 817 inner hole of cylinder body and can slide axially with piston 813；
The left side of piston 813 and the inside of cylinder body 817 form oil outlet chamber 816, and the precompression of return spring part 815 acts on promotion
806 one end of bar, and it is pressed against the second auxiliary section V2 and the 4th circular conical surface V4 closure, piston 813 on the end face of shell 818；It is living
Fill in shape between 813 right side and the first cylindrical surface of shell 818, the right side of first boss and the outer surface of catch bar 806
At oil suction chamber 809.
The ante-chamber of manual cylinder 4 is equipped with drainage hole 416, after preferably 4 ante-chamber of manual cylinder is passed through brake piping and two by it
Take turns the wheel cylinder connection of brake；The motor 801 of the motor 501 of first electric cylinder 5 and the second electric cylinder 8 respectively with control for brake
Device 7 is connected using conducting wire；Brake monitor 7 is also connect with braking light switch 3 and brake-pedal-travel sensor 9 by conducting wire；
Brake-pedal-travel sensor 9 is mounted on the gear 405 of manual cylinder 4, for obtaining the stroke signal of brake pedal 1.
The present invention is the mixing double-circuit braking system with multiple-working mode and provides brake control method,
Its braking mode includes brake-by-wire, power brake, fail-safe braking and failure manpower backup braking etc..Below to these
Specific brake control method and the course of work under braking mode are illustrated.
1. brake control method and the course of work under brake-by-wire mode
As shown in Fig. 2, system works in brake-by-wire mode when the stroke of brake pedal 1 is smaller.It is stepped on stepping on braking
There is one section of idle stroke S in the incipient stage of plate 1, top 418 and jack 419.As long as idle stroke S is not completely eliminated, pedal
Power would not pass to piston component, i.e. brake pedal 1 and manual cylinder 4 and each wheel drag is in decoupled state.It is stepped on small
Under the brake-by-wire mode of plate stroke, brake force needed for wheel drag 10,11,12 and 13 is usually by the first electric cylinder 5
It is provided with the second electric cylinder 8.Its specific work process are as follows: manual braking circuit is that brake monitor 7 receives pedal travel biography
The target current of the motor 801 of required brake force and the second electric cylinder 8 is calculated after the signal of sensor 9, and is sent out to motor 801
It send instruction that it is made to rotate simultaneously output torque, drives ball wire bar pair to make catch bar 806 to left through shaft coupling 802；It pushes
The thrust of bar 806 is bonded the first circular conical surface with third circular conical surface V3 after overcoming 815 precompression of return elastic component, second justifies
The conical surface and the 4th circular conical surface V4 separately, catch bar 806 be axially moveable together with piston 813 so that the second electric cylinder 8 it
816 volume of oil outlet chamber reduces, and then wheel cylinder entrance of the output pressure through oil outlet 814 and brake piping to brake group；With
This simultaneously, 809 volume of oil suction chamber increase, required brake fluid by the compensated hole 412 of fluid reservoir 417, manual cylinder 4 ante-chamber,
Drainage hole 416, brake piping and oil inlet 808 are supplemented to oil suction chamber 809；Brake-by-wire circuit is the reception of brake monitor 7
The target current of the motor 501 of required brake force and the first electric cylinder 5 is calculated after to the signal of pedal travel sensor 9, and
Sending instruction to motor 501 makes it rotate simultaneously output torque, and driving ball wire bar pair pushes piston 512 to move；When with piston
High pressure chest D sets up pressure after 512 1 synkinematic leather cups 513 cover all electric cylinder compensation hole C, pressure warp
Electric cylinder drainage hole E and brake piping reach the wheel cylinder entrance of brake group.
If brake pedal 1 is totally released, brake release, the pedal travel that pedal travel sensor 9 measures at this time is
Zero, brake monitor 7 enables motor 801 stop working accordingly, and lead screw 806 is under the effect of return elastic component 815 together with piston 813
Reverse movement returns to initial position, and the second circular conical surface is bonded with the 4th circular conical surface V4, first circular conical surface and described the
Separately, the brake release of wheel cylinder, extra brake fluid returns to fluid reservoir 417 to three circular conical surface V3 in oil suction chamber 809；Braking control
Device 7 processed enables motor 501 stop working accordingly, and screw rod 507 stops applying axial force in piston 512；Piston 512 and screw rod 507 exist
Return spring 516 returns to initial position under acting on, and the rotor of rolled thread nut 503, shaft coupling 502 and motor 501 is in screw rod
It is rotated under 507 drivings and also returns to initial position；The wheel cylinder of each brake connects through brake piping and drainage hole E and high pressure chest D
Logical, high pressure chest D is connected to the compensated hole C of fluid reservoir 315, thus pressure of wheel braking cylinder each brake releasing after reducing.
2. brake control method and the course of work under power brake mode
It eliminates idle stroke S in Fig. 2 when brake-pedal travel increases to and further increases brake-pedal travel, step on
Plate power can be passed directly on the piston component of manual cylinder 4 and manual cylinder 4 is made to have pressure output, and system works in composite braking
Mode.Its specific work process are as follows: after idle stroke S is eliminated, S=0, brake pedal force is through fulcrum post 2, push rod 401 and rack gear
403 act on piston component and are allowed to move forward, and the Forward of secondary piston 414 drives leather cup 415 also to move forward, and leather cup covers compensation hole
416 output pressure of drainage hole after 412, which reaches oil suction chamber 809 through the oil inlet 808 of brake piping and electric cylinder, and makees
For piston 813；Second electric cylinder 8 starts power brake, and the second circular conical surface is bonded with the 4th circular conical surface V4, and described the
One circular conical surface and the third circular conical surface V3 are separately；Brake monitor 7 is helped according to pedal travel signal with what is be previously set
Force characteristic curve calculates the target current of motor 801 and driving motor 801 works, and drives ball wire bar pair through shaft coupling 802
Apply thrust in catch bar 806,815 precompression of return elastic component is overcome to make the second circular conical surface and the 4th circular conical surface later
The interval V4, first circular conical surface are bonded with the third circular conical surface V3；After first circular conical surface is bonded with third circular conical surface V3,
The thrust that motor reaches lead screw 806 will act on piston 813；At this point, the power acted on piston 813 had both included through manual cylinder 4
The pedal force of oil suction chamber 809 is reached with brake piping, and includes reaching catch bar 806 through shaft coupling 802, rolled thread nut 804
Motor force, be axially moveable in the collective effect lower piston 813 of pedal force and motor torque, 816 volume of oil outlet chamber subtracts
Small, the pressure of generation is exported through brake piping to the wheel cylinder of corresponding wheel brake, to realize rear-wheel manual braking；It is driving
While the person's of sailing brake pedal 1 applies manual braking to rear-wheel, the rack gear 401 of forward movement drives the tooth engaged
403 rotation of wheel, the signal that pedal travel sensor 9 measures 403 corner of gear of reflection pedal travel are braked controller 7 and connect
It receives.Brake monitor 7 is converted into pedal travel after receiving the angular signal, then according to the pedal travel and manual braking
Circuit PV characteristic (characteristic curve for reflecting brake-pedal travel and manual braking circuit brake pressure relationship) calculates rear-wheel
Brake force；Further, according to ideal braking force distribution curve (i.e. so that front and rear wheel while seized front and rear wheel
Brake force relation curve) and calculated rear-wheel braking force calculate front-wheel target braking force and be scaled motor 501
Target torque and target current；The work of 7 driving motor 501 of brake monitor, and drive ball wire bar pair that piston 512 is pushed to transport
It is dynamic；High pressure chest D sets up pressure after covering all electric cylinder compensation hole C with the synkinematic leather cup 513 of piston 512 1
Power, the pressure reach the wheel cylinder of left front brake 10 and right front brake 11 through electric cylinder drainage hole E and brake piping, thus
Two front wheels brake generates braking moment and realizes front-wheel brake-by-wire.If under power brake mode brake pedal 1 unclamp enough to
Lead to idle stroke S > 0 in Fig. 2, then system is brake-by-wire mode by power brake pattern switching more.
3. brake control method and the course of work under fail-safe braking mode
When a brake circuit breaks down, system works in fail-safe braking mode.When brake monitor 7 is examined
When measuring one brake circuit failure of system appearance, it can be applied by the motor to the brake circuit that do not fail more normal than system
The target torque of work Shi Geng great is to implement fail-safe braking；At this point, brake monitor 7 is believed according to pedal travel sensor
Number or the brake request from other electric-control systems calculate target power-assisted or target braking force first, be then allocated to not
Each wheel of failure brake circuit, then the electric cylinder output torque for the brake circuit that do not fail is controlled, thus the fail-safe system of realization
It is dynamic.In the target power-assisted or target braking force of wheel each under determining fail-safe braking mode, corresponding motor should not exceed
Torque capacity, or require to determine according to specific embodiment and referring to relevant laws and regulations.
4. failure backup manual braking's mode
If braking system is because any failure causes its electric control braking function to completely lose, i.e., two brake circuits all can not
It works by the motor of the first electric cylinder 5 and the second electric cylinder 8 and generates effective brake effect, then manpower backup system can be implemented
It is dynamic.It fails under manpower backup braking mode, if driver's brake pedal 1, pedal force is via fulcrum post 2,401 and of push rod
Rack gear 403 pushes the piston component of manual cylinder 4, and it is electronic that the brake pressure that manual cylinder 4 is set up through brake piping reaches second
The oil suction chamber 809 of cylinder 8.Because motor 801 does not work, the second circular conical surface and the 4th circular conical surface under the effect of return spring precompression
V4 fitting, therefore the oil suction chamber 809 of electric cylinder and oil outlet chamber 816 are in brake fluid isolation；At this point, electronic the cylinder piston 813
It is moved under pressure effect in its oil suction chamber 809 from manual cylinder 4, the pressure that oil outlet chamber 816 generates is through brake piping
It exports to the wheel cylinder of corresponding wheel brake, to apply manpower backup braking.
Claims (10)
1. a kind of mixing double-circuit braking system with multiple-working mode characterized by comprising
Manual braking circuit, the manual braking circuit include the manual cylinder (4) coupled with brake pedal (1), the manual cylinder
(4) drainage hole (416) is coupled by brake piping with the oil inlet (808) of the second electric cylinder (8), second electric cylinder
(8) it is electrically connected with brake monitor (7) and is coupled by brake piping with the first brake group；
Brake-by-wire circuit, it includes the first electric cylinder (5) coupled with second brake group in the brake-by-wire circuit, with institute
The brake monitor (7) for stating the first electric cylinder (5) connection also couples with pedal travel sensor (9), the pedal travel
The signal of stroke of the sensor (9) to detect the brake pedal (1)；
Second electric cylinder (8) includes:
Cylinder body (817)；The motor (801) of motor (801), second electric cylinder (8) passes through pushing meanss band piston (813)
Sliding；Through-hole is offered among the piston (813) of second electric cylinder (8), the pushing meanss include by the motor
(801) catch bar (806) driven, the catch bar (806) activity pass through the through-hole and with the inner sidewall of the through-hole it
Between form the oil passage that passes through for oil liquid, the catch bar (806) is respectively arranged with and institute in the two sides for being located at the through-hole
Piston (813) is stated to match to open and close the first auxiliary section (V1) of the oil passage and the second auxiliary section (V2)；Institute
It states catch bar (806) and is provided with return bullet across the end of the through-hole and the cylinder body (817) of second electric cylinder (8)
Property part (815)；
The cylinder body (817) of second electric cylinder opens up the oil inlet (808) in the two sides of the piston (813) respectively and goes out
Hydraulic fluid port (814).
2. a kind of mixing double-circuit braking system with multiple-working mode as described in claim 1, which is characterized in that institute
Stating the first auxiliary section (V1) is first circular conical surface tapered to the direction of the piston (813) close to second electric cylinder (8), institute
Stating the second auxiliary section (V2) is the second circular conical surface to the direction flaring of the piston (813) far from second electric cylinder (8)；Institute
The piston (813) for stating the second electric cylinder (8) is respectively equipped at through-hole both ends open edge to match with first circular conical surface
The third circular conical surface (V3) of conjunction and the 4th circular conical surface (V4) with second circular cone towards cooperation；And first circular cone
When face is bonded with the third circular conical surface (V3), second circular conical surface is separately arranged with the 4th circular conical surface (V4)；Institute
When stating the second circular conical surface and being bonded with the 4th circular conical surface (V4), first circular conical surface is alternate with the third circular conical surface (V3)
Every setting.
3. a kind of mixing double-circuit braking system with multiple-working mode as claimed in claim 2, which is characterized in that institute
It states catch bar (806) and is equipped with annular bottom surface (V5) between first conical surface and second conical surface, the annular bottom surface
(V5) diameter is less than the internal diameter of the through-hole.
4. a kind of mixing double-circuit braking system with multiple-working mode as described in claim 1, which is characterized in that institute
Stating pushing meanss is ball wire bar pair, and the ball wire bar pair includes being driven by the motor (801) of second electric cylinder (8)
Nut (804) and the catch bar (806) cooperated with the nut (804).
5. a kind of mixing double-circuit braking system with multiple-working mode as described in claim 1, which is characterized in that institute
Stating the first electric cylinder (5) includes:
Shell (508)；Cylinder body (517) is fixedly connected with shell (508)；
Motor (501), the motor (501) of first electric cylinder (5) are fixed on the shell (508) of first electric cylinder (5)
It above and with the ball wire bar pair being arranged in the described first electronic cylinder housing (508) connect, the ball wire bar pair includes by institute
State the rolled thread nut (503) of motor (501) driving of the first electric cylinder (5) and the screw rod with the rolled thread nut (503) cooperation
(507)；The screw rod (507) is fixedly connected with the piston (512) being arranged in the cylinder body (517) of first electric cylinder (5),
It is provided with return elastic component between the inner wall of the cylinder body (517) of the piston (512) and first electric cylinder (5), described
The cylinder body (517) of one electric cylinder (5) offers electric cylinder compensation hole (C), electric cylinder confession fluid apertures (B) and electric cylinder drainage hole (E)；
Leather cup (513) are installed on the piston (512) of first electric cylinder (5), when the return elastic component is in precompressed shape
When state, the leather cup is between the electric cylinder compensation hole (C) and the electric cylinder confession fluid apertures (B).
6. a kind of mixing double-circuit braking system with multiple-working mode as claimed in claim 5, which is characterized in that institute
The inside for stating the shell (508) of the first electric cylinder (5) is cylindrical hollow configuration, and internal includes being connected and diameter successively increases
Big the first cylindrical cavity, the second cylindrical cavity and third cylindrical cavity, first cylindrical cavity and second
It is provided with closing surface between cylindrical cavity, the through-hole passed through for the screw rod (507) is offered on the closing surface；Described
The shaft shoulder is formed between two cylindrical cavities and the third cylindrical cavity, the rolled thread nut (503) is rotatablely arranged at
In the third cylindrical cavity, and one end of the rolled thread nut (503) is fixed on the shaft shoulder by bearing (504)；Institute
The shell (508) for stating the first electric cylinder (5) extends axially outwardly to form boss close to the one end of the piston (512), described
Boss matches to merge with the sealing of the opening of the first electric cylinder cylinder body (517) to be fixedly connected.
7. a kind of mixing double-circuit braking system with multiple-working mode as claimed in claim 5, which is characterized in that institute
Screw rod (507) are stated equipped with guide groove, guide pin (510) one end in the shell (508) is fixed on and is inserted into the guide groove.
8. a kind of mixing double-circuit braking system with multiple-working mode as described in claim 1, which is characterized in that institute
Stating manual cylinder (4) includes:
End cap (404), the end cap (404) of the manual cylinder (4) is interior to be equipped with rack gear (403), and the rack gear (403) is by being fixed on
Push rod (401) thereon couples with brake pedal (1), and there is the rack gear (403) sawtooth to engage with sensor gear (405),
The pedal travel sensor (10) is used to detect the rotation of the sensor gear (405), the rack gear (403) and the people
Feel spring (406) are provided between power cylinder cylinder body (410)；
Manual cylinder cylinder body (410), the interior manual cylinder cylinder body (410) includes joining secondary piston (414) and rear piston
(408), it is provided with piston reset elastic component (413) between the secondary piston (414) and the manual cylinder cylinder body (410), it is described
One section of idle stroke (S) is provided between piston (408) and the rack gear (403) afterwards；Preceding skin is provided on the secondary piston (414)
Bowl (415), under the precompression of the piston reset elastic component (413), the preceding leather cup (415) be located at confession fluid apertures (411) and
Between compensation hole (412), the drainage hole (416) are provided on the manual cylinder cylinder body (410).
9. a kind of mixing double-circuit braking system with multiple-working mode as claimed in claim 8, which is characterized in that institute
The side for stating rear piston (408) towards the rack gear (403) offers jack (419), on the rack gear (403) have with it is described
Jack plugs the top (418) of cooperation；Precompressed of the rack gear (403) in the feel spring (406) of the manual cylinder (4)
Under power effect, there are the idle stroke (S) between the end face of the top (418) and the bottom surface of the jack (419).
10. a kind of using a kind of mixing double loop system with multiple-working mode as claimed in any one of claims 1 to 9
Dynamic system carries out the braking method of automobile brake characterized by comprising
Brake-by-wire mode, braking process are as follows: when driver steps on pedal (1), so that the idle stroke (S) reduces but is greater than
When zero, the brake monitor (7) detects the pedal travel signal of the pedal travel sensor (9) and controls described first
Electric cylinder (5) and second electric cylinder (8) respectively brake the second brake and the first brake group；
Power brake mode, braking process are as follows: when driver steps on pedal (1), so that the idle stroke (S) is reduced to zero
When, the manual cylinder (4) exports the second electric cylinder (8) described in brake fluid to the second electric cylinder (8) power-assisted to described first
Brake is braked, and at the same time, the brake monitor (7) detects the pedal row of the pedal travel sensor (9)
Journey signal simultaneously controls first electric cylinder (5) and second electric cylinder (8) respectively to the second brake and described
First brake group is braked；
Fail-safe mode, braking process are as follows: when driver steps on pedal (1), if the brake-by-wire partial failure
Or manual braking's partial failure, the brake monitor (7) control another normal circuit and are braked；
Failure backup manual braking's mode, braking process are as follows: when driver steps on pedal (1), if the brake-by-wire
Partial failure and the manual braking circuit are failed simultaneously, and the manual cylinder (4) exports brake fluid to second electric cylinder (8)
The piston (813) for pushing second electric cylinder (8) exports the brake fluid of second electric cylinder (8) to
One brake group is braked.
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| CN201910325247.3A CN110077374A (en) | 2019-04-22 | 2019-04-22 | A kind of mixing double-circuit braking system and braking method with multiple-working mode |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110775033A (en) * | 2019-11-05 | 2020-02-11 | 南京经纬达汽车科技有限公司 | Distributed brake system with manpower failure backup and pressure regulation control method |
| CN110789508A (en) * | 2019-11-05 | 2020-02-14 | 南京经纬达汽车科技有限公司 | Independent booster pump distributed brake system and brake torque vector control method thereof |
| CN110861625A (en) * | 2019-11-05 | 2020-03-06 | 南京经纬达汽车科技有限公司 | Distributed braking system with failure backup and braking pressure vector 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 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110775033A (en) * | 2019-11-05 | 2020-02-11 | 南京经纬达汽车科技有限公司 | Distributed brake system with manpower failure backup and pressure regulation control method |
| CN110789508A (en) * | 2019-11-05 | 2020-02-14 | 南京经纬达汽车科技有限公司 | Independent booster pump distributed brake system and brake torque vector control method thereof |
| CN110861625A (en) * | 2019-11-05 | 2020-03-06 | 南京经纬达汽车科技有限公司 | Distributed braking system with failure backup and braking pressure vector control method thereof |
| CN110775033B (en) * | 2019-11-05 | 2021-09-28 | 南京经纬达汽车科技有限公司 | Distributed brake system with manpower failure backup and pressure regulation control method |
| US11613239B2 (en) | 2021-06-12 | 2023-03-28 | Bwi (Shanghai) Co., Ltd. | Pressure supply unit for a brake system of a vehicle |
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