CN205971268U - Electricity liquid servo braking system all with multiple mode - Google Patents
Electricity liquid servo braking system all with multiple mode Download PDFInfo
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- CN205971268U CN205971268U CN201620996655.3U CN201620996655U CN205971268U CN 205971268 U CN205971268 U CN 205971268U CN 201620996655 U CN201620996655 U CN 201620996655U CN 205971268 U CN205971268 U CN 205971268U
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Abstract
The utility model discloses an electricity liquid servo braking system all with multiple mode, this electricity liquid servo braking system are all including brake pedal, manpower jar, electric liquid servo -cylinder, brake master cylinder, liquid storage pot, master cylinder pressure sensor, hydraulic control unit, wheel cylinder, motor, ecu, brake pedal stroke sensor. The utility model discloses an electricity liquid servo -cylinder and manpower jar be independence or superposition effect in brake master cylinder's piston mutually to apply the braking to whole or partial wheel. The utility model discloses an electricity liquid servo braking system multiple mode all makes it can be according to the work of braking demand in active brake mode, drive -by -wire braking mode, the helping hand braking mode of difference to the spare manpower brake function that became invalid has. The utility model has the advantages of: have multiple braking mode, optimum braking mode is selected to the braking demand in the time of can be according to practical application, and the reliability is high, the inefficacy protective capacities is strong.
Description
Technical field
This utility model belongs to brake system of car technical field, specifically, is a kind of to have multiple-working mode
Electro-hydraulic servo brakes.
Background technology
Brake system of car is closely related safely with running.Except traditional vacuum servo formula, electric boosted formula servo
Brakes and the anti-blocking brake system (ABS) that grows up on the basis of them are outward, of concern in recent years new
Type brakes also includes line control brake system, such as EHB (EHB) and mechanical type brake system electric
(EMB).Line control brake system can neatly coordinate frictional damping and regenerative braking, also can conveniently realize active brake (institute
Meaning " active brake ", refers to the braking in the case of non-brake pedal, part or all of wheel being applied).Line traffic control
Dynamic system is better than traditional hydraulic pressure system in terms of meeting the requirement to brakes for the system such as Brake energy recovery, active collision avoidance
Dynamic system.
Hydraulic braking system for automobile still adopts vacuum servo mostly at present, and minority automobile is using electric boosted (as day steams
The e-ACT brakes of Che company) etc. other forms power assisting device.Compared with vacuum servo, electric booster braking system
Power-assisted size is controlled, and when needing Brake energy recovery, controllable assist motor realizes few power-assisted or non-power-assisted as needed, with
Reduce the degree of participation that master cylinder pressure exports, reduces friction brake as far as possible, therefore Brake energy recovery rate is higher.
Line control brake system eliminates the mechanical connection of Conventional braking systems, has that structure is simpler, it is more flexible to control, rings
The features such as shorter between seasonable, braking ability is more preferable, maintenance is simple.For improving fail-safe function, the electronics of line control brake system
Control system typically all has the fault diagnosis more strict compared with Conventional braking systems and fault tolerance.
The EHB having multiple structural forms at present is applied to volume production automobile, and such as the electro-hydraulic brake of Bosch controls (SBC)
RBS system of system, the ECB system of Toyota Motor Corporation and Continental AG etc..EHB typically adopts high pressure fluid reservoir as energy supply
Device, is adjusted by controlling liquid feed valve, liquid valve to realize pressure of wheel braking cylinder, provides brake pedal sense by pedal travel simulator
Feel；When EHB lost efficacy, brake pressure can reach wheel cylinder by the piston cylinder of human control through normally opened electromagnetic valve and implement backup system
Dynamic.Because using high pressure fluid reservoir, as power supply device, during EHB normal work, system pressure response is fast, but waits tightly when collide
Under anxious operating mode, it is likely to result in high-pressure leakage, there is potential safety hazard.In addition, need to often work, easily for producing the plunger displacement pump of high pressure
Cause abrasion, leakage and pressure accumulation ability may be led to decline.
EMB, according to brake pedal signal, is rotated by controlled motor, makes caliper compression brake disc through actuating device
Realize automobile brake.EMB has the characteristics that to respond fast, easily controllable and brake-by-wire technology, German continent TEVEZ company, west
Global each Main Auto parts company such as MENZI company and Delphi company of the U.S. all develops respective EMB prototype sample in succession
Machine.The shortcoming of EMB be brake fade standby system difficult design and needing again develop brake and using large power supply and
Four relatively costly high performance motor.
The IBS proposing in recent years will brake power supply device and pressure-regulating device is integrated, achievable brake-by-wire and
There is inefficacy backup braking function.Authorize Chinese patent " having the brakes with multi-functional storage device " (open
Number：CN102639370A), this system include a motor, ball screw assembly, master cylinder, brake pedal, stroke simulator,
Electromagnetic valve and fluid pressure line etc., motor and stroke simulator are arranged in master cylinder rear end；Motor drive feed screw nut rotates,
Ball-screw promotes piston compression brake liquid；When motor failure, rely on Manual-pushing piston, compress master cylinder inside brake liquid.Should
The amount of parts that system uses is few, compact conformation, is easy to arrange；Using high dynamic characteristic motor and multichannel multiplexing method pair
Each pressure of wheel braking cylinder realizes sequential adjustment, and system pressure response is fast and Stress control is accurate.The shortcoming of this system is that not only motor becomes
This is very high, and ball screw is because being led to using little helical pitch, and difficulty of processing is larger, cost is also higher.USPO announces
" PRESSURE MODULATOR CONTROL " patent (publication number：US2009/0115247A1), including two motors, two lists
Chamber piston master cylinder, pedal travel simulator, movement conversion mechanism, electromagnetic valve and fluid pressure line etc., each master cylinder is all by two
Electromagnetic valve is connected with two wheel cylinders respectively；When motor failure, Manual-pushing master cylinder piston can be passed through, system in compression piston cylinder
Hydrodynamic.Each master cylinder of this system is all connected with two wheel cylinders respectively by two electromagnetic valves, is entered using bilateral channel multiplexing method
Row pressure transfiguration is adjusted, and reduces to electricity compared with the four-way multiplex mode adopting in the Chinese invention patent of above-mentioned mandate
The requirement of machine dynamic property.The shortcoming of this bi-motor scheme is that two brake circuits are separate, and the motility that system controls is relatively
Difference, cannot ensure to select that one adaptable with motor dynamics performance when practicing, to play system optimal
The control model of performance.For example, if motor dynamics performance can not expire under the conditions of process materials when practicing and cost control
The utilization of sufficient multichannel multiplexing method, then this system cannot realize meeting the pressure of brake request and adjust target.In addition, this system
Lost efficacy backup mechanism complex structure.
Content of the invention
In order to solve above-mentioned problem of the prior art, the purpose of this utility model is to propose one kind to have multiple-working mode
Electro-hydraulic servo brakes, in active brake pattern, brake-by-wire pattern, power brake MODE of operation, and can have
Lost efficacy backup manual braking's function, to meet the braking requirement under different operating modes.
In order to achieve the above object, this utility model employs the following technical solutions：
A kind of electro-hydraulic servo brakes with multiple-working mode it is characterised in that：Including brake pedal, manpower
Cylinder, Electrohydraulic servo cylinder, master cylinder, fluid reservoir, master cylinder pressure sensor, hydraulic control unit, wheel cylinder, motor, Electronic Control
Unit, brake-pedal-travel sensor；Wherein：
Described manual cylinder includes push rod, back casing, rear piston, valve pipe, clamping device, pedal simulation spring, procapsid, front work
Plug, rear piston return spring, push rod；Described valve pipe is located in described back cover body and is coupled with described clamping device, described push rod
Rearward end is connected with described brake pedal, and the leading section of described push rod embeds in described clamping device；Described rear piston is located at described
In the back cover body and front end of described rear piston is fixed with the piston rod that activity penetrates described procapsid；Described pedal simulates spring position
Between described valve pipe and described rear piston；Described rear piston return spring is located between described rear piston and described back casing；
Servo chamber after constituting between the front end face of described rear piston and described back casing and described valve pipe, when not stepping on described brake pedal
Described rear servo chamber is connected with described fluid reservoir by the compensation hole being opened on described back casing；The rear portion of described push rod is located at
Couple in described fore shell body and with described secondary piston；Servo before constituting between the rear end face of described secondary piston and described procapsid
Chamber；
Described Electrohydraulic servo cylinder includes motor, ball-screw sleeve, piston push rod, hydraulic cylinder body, piston push rod return
Spring, rolled thread nut, leading screw；Described rolled thread nut only can be arranged in described ball-screw sleeve around itself axial rotation,
The output shaft of described motor is in transmission connection with described rolled thread nut；Described rolled thread nut constitutes ball screw assembly, with described leading screw,
Described leading screw only can be along coordinating in described rolled thread nut with itself moving axially back and forth；The rear end of described piston push rod withstands on institute
State on the front end of leading screw, the front end of described piston push rod is fixed with secondary piston, described secondary piston is located in described hydraulic cylinder body,
Described piston push rod return spring is located between described secondary piston and the front end face of described hydraulic cylinder body, described secondary piston and institute
State composition hydraulic cavities between the rear end face of hydraulic cylinder body, described hydraulic cavities pass through the described front servo of pipeline and described manual cylinder
Chamber connects；
Described master cylinder include master cylinder body, master cylinder first piston, master cylinder second piston, first piston return spring and
Second piston return spring；The rearward end activity of described master cylinder first piston passes through the rear end face of described master cylinder body, described master
Cylinder second piston is located at the interior front of described master cylinder body；Shape between described master cylinder first piston and described master cylinder second piston
Become the first high pressure chest, between described master cylinder second piston and the front end face of described master cylinder body, form the second high pressure chest；Described top
The front end of bar withstands on described master cylinder first piston；Described fluid reservoir respectively with described first high pressure chest and described second high pressure chest
It is connected；
Described first high pressure chest is connected with described hydraulic control unit by brake piping respectively with described second high pressure chest,
Described hydraulic control unit is connected by brake piping with described wheel cylinder；Described master cylinder pressure sensor is arranged on described braking master
On cylinder, described brake-pedal-travel sensor is arranged on described brake pedal, described electronic control unit respectively with described electricity
Machine, described master cylinder pressure sensor are connected with described brake-pedal-travel sensor, and described electronic control unit receives described
The displacement signal of brake pedal that brake-pedal-travel sensor obtains and described master cylinder pressure sensor obtains described the
One high pressure chest or the pressure signal of described second high pressure chest, and control the output torque of described motor.
Preferably, described Electrohydraulic servo cylinder also includes guide and guide sleeve, and described guide is fixed on described silk
On thick stick, on described guide sleeve along and described leading screw axially in parallel direction extend and offer and described guide cooperation
Gathering sill.In a particular embodiment, guide adopts guide finger, can move, and prevent this silk in the gathering sill of leading screw sleeve
Thick stick rotates.
Wherein, described guide sleeve is bolted on the front end of described ball-screw sleeve.
Described rolled thread nut passes through bearings in described ball-screw sleeve, the output shaft of described motor and described rolling
Silk nut passes through shaft coupling and is connected.After the output shaft rotation of motor, rolled thread nut is driven to rotate coaxially, so that leading screw is along itself
Axial translation.Preferably, described bearing is angular contact bearing.
Preferably, the front end face of described master cylinder first piston is vertically fixed with bolt, the head of described bolt passes through one
Position with the step cooperation on the top surface of described cover body after the top surface of cover body, the bottom surface of described cover body is fixed on described master cylinder second
On the rear end face of piston, the length of described bolt is more than the height of described cover body.
It is highly preferred that offering inlet opening and liquid outlet on the side wall of described cover body.
Wherein, described rear servo chamber is included by the manual cylinder constituting between described rear piston and the front end face of described back casing
Ante-chamber, by the manual cylinder piston cavity being formed between described rear piston and described valve pipe；The rear portion of described rear piston is provided with backwards
Opening the centre bore with the leading section grafting cooperation of described valve pipe, the front end face of described valve pipe and the bottom surface of described centre bore it
Between form described manual cylinder piston cavity；It is communicated with described manual cylinder piston cavity and described manual cylinder in described piston rod
The through hole of ante-chamber.
Described through hole includes the piston axial hole extending forward in described centre bore, and connects described piston axial hole
Piston rod radial hole with described manual cylinder ante-chamber.
Preferably, the outer peripheral face of described rear piston offers annular groove, described rear piston is interior with described back casing
The manual cylinder back cavity of annular is constituted between wall；It is further opened with described rear piston connecting described centre bore and described manual cylinder back cavity
Piston radial hole, the front periphery face of described valve pipe offers the cannelure in corresponding described piston radial hole, described valve pipe
Front portion be further opened with connecting the valve pipe axial hole of described centre bore and described cannelure.
Further, described back casing is further opened with by-pass prot, described by-pass prot is located at the rear side in described compensation hole, institute
State by-pass prot to be connected with described fluid reservoir by same brake piping with described compensation hole；Do not step on institute during described brake pedal
State by-pass prot to be blocked by the anterior side of described rear piston.
Wherein, described clamping device and described valve pipe are threaded connection, and are additionally provided between described clamping device and described valve pipe
Cushion block.The mode being threaded connection and the setting of cushion block, can adjust the connecting length of clamping device and valve pipe.
Preferably, the rearward end of described push rod and described secondary piston are threaded connection, also threaded on described push rod
There is locking nut.Using such design, the length that push rod extends forward can be adjusted from secondary piston.
Due to adopting technique scheme, this utility model has advantages below：
1st, this utility model has the existing line control brake system of electro-hydraulic servo brakes of multiple-working mode and is had
Brake pedal and brake between can decouple function, also have the high reliability of non-line control brake system.
2nd, this utility model has the electro-hydraulic servo brakes of multiple-working mode and need not separately set special brake fade
Back-up device, even if motor failure, driver still can be by completing manpower backup braking to the operation of brake pedal.
3rd, the present invention has the electro-hydraulic servo brakes of multiple-working mode, and motor participates in the regulation of brake pressure, is
System pressure oscillation is little, regulation precision is high, and can suppress time liquid pair of hydraulic control unit by motor torque active control
The impact of brake pedal.
4th, the present invention has the electro-hydraulic servo brakes of multiple-working mode when working in power brake pattern, because of people
Power cylinder has the amplification to push rod force under all one's effort damped condition, can be selected for that power is less, lower-cost motor.
5th, the present invention has the electro-hydraulic servo brakes of multiple-working mode and can continue to use traditional master cylinder and system
Dynamic device, can implement active brake using Electrohydraulic servo cylinder simultaneously, need not adopt and have part or all of wheel active boost work(
The hydraulic control unit of energy, reduces cost.
6th, the present invention has the electro-hydraulic servo brakes of multiple-working mode and disclosure satisfy that new-energy automobile regenerative braking
Composite braking with electro-hydraulic servo frictional damping requires, and farthest can reclaim under the premise of ensureing good brake pedal feel
Braking energy.
Brief description
Fig. 1 is the structural representation of the electro-hydraulic servo brakes with multiple-working mode of the present utility model.
Fig. 2 is E portion enlarged drawing in Fig. 1.
In accompanying drawing：
Specific embodiment
Below in conjunction with the accompanying drawings specific embodiment of the present utility model is described in detail.
Refer to Fig. 1, this utility model is a kind of electro-hydraulic servo brakes with multiple-working mode, it includes making
Dynamic pedal 1, manual cylinder 2, Electrohydraulic servo cylinder 3, master cylinder 4, fluid reservoir 5, hydraulic control unit 6, wheel cylinder 7, master cylinder pressure pass
Sensor 8, electronic control unit 10, PTS 11.Electronic control unit 10, i.e. ECU (Electronic Control
Unit), it is also called " car running computer ", " vehicle-mounted computer ".
Manual cylinder 2 includes push rod 201, clamping device 211, valve pipe 202, back casing 203, pedal simulation spring 204, rear piston
205th, rear piston return spring 206, procapsid 207, secondary piston 208, push rod 209, locking nut 210, clamping device 211.Wherein,
Valve pipe 202 is located in back casing 203 and passes through bolt-connection with clamping device 211, between the rear end of valve pipe 202 and clamping device 211
It is additionally provided with cushion block 212.Piston 205 is located in back casing 203 and its front end is fixed with piston rod afterwards.Pedal simulates 204, spring
Between valve pipe 202 and rear piston 205.Afterwards piston return spring 206 be located at rear piston 205 and back casing 203 front end face it
Between.Secondary piston 208 is located in procapsid 207, and the rear portion of push rod 209 is located in procapsid 207, the rearward end of push rod 209
It is connected by screw thread and with secondary piston 208, the length that push rod 209 is forward extended out by screw thread scalable, and pass through locking nut
210 are locked.It is provided with dividing plate, the rear end face of dividing plate is the front end face of back casing between procapsid 207 and back casing 203,
The front end face of dividing plate is the rear end face of procapsid.
As shown in Fig. 2 servo chamber after constituting between the front end face of rear piston 205 and back casing 203 and valve pipe 202, do not step on
During lower brake pedal 1, described rear servo chamber is connected with fluid reservoir 5 by the compensation hole 2031 being opened on back casing 203.Front work
Servo chamber before constituting between plug 208 and the rear end face of procapsid 207.Described rear servo chamber is included by rear piston 205 and back casing
Between 203 front end face constitute manual cylinder ante-chamber B, by the manual cylinder piston cavity being formed between rear piston 203 and valve pipe 202
D.The rear portion of piston 205 is provided with backward opening the centre bore with the leading section grafting cooperation of valve pipe 202 afterwards, before valve pipe 202
Form manual cylinder piston cavity D between the bottom surface of end face and described centre bore.It is communicated with described manual cylinder in described piston rod
Piston cavity and the through hole of described manual cylinder ante-chamber, described through hole includes the piston axial hole extending forward in described centre bore
2051, and the piston rod radial hole 2052 of connection piston axial hole 2051 and manual cylinder ante-chamber B.The outer peripheral face of piston 205 afterwards
On offer annular groove, constitute between rear piston 205 and the inwall of back casing 203 annular manual cylinder back cavity C.Piston afterwards
It is further opened with connecting the piston radial hole 2053 of described centre bore and manual cylinder back cavity C, the front periphery face of valve pipe 202 on 205
On offer the cannelure 2021 in corresponding piston radial hole 2053, the front portion of valve pipe 202 be further opened with connecting described centre bore and
The valve pipe axial hole 2022 of cannelure 2021.By-pass prot 2032 is further opened with back casing 203, by-pass prot 2032 is located at and compensates hole
2031 rear side, by-pass prot 2032 is connected with fluid reservoir 5 by same brake piping with compensating hole 2031；Do not step on braking to step on
During plate 1, by-pass prot 2032 is blocked by the anterior side of rear piston 205, and in the present embodiment, rear piston 205 is before and after annular groove
It is respectively provided on two sides with front leather cup and rear leather cup, by-pass prot 2032 during non-brake pedal 1 is blocked up by the front leather cup of rear piston 205
Live.
Electrohydraulic servo cylinder 3 includes motor 301, shaft coupling 302, ball-screw sleeve 303, bolt 304, guide sleeve
305th, piston push rod 306, hydraulic cylinder body 307, piston push rod return spring 308, guide 309, angular contact ball bearing 310,
Rolled thread nut 311, leading screw 312.Wherein the output shaft of motor 301 is coupled by shaft coupling 302 with rolled thread nut 311, motor 301
Output torque pass to rolled thread nut 311, thus driving rolled thread nut 311 around itself axial rotation.Rolled thread nut 311 and silk
Thick stick 312 constitutes ball screw assembly, is partly located in ball-screw sleeve 303, is partly located in guide sleeve 305, rolled thread spiral shell
Female 311 are bearing in ball-screw sleeve 303 by angular contact ball bearing 310.Guide 309 is fixed on leading screw 312, can be
Slide anteroposterior in the gathering sill 3051 of ball-screw sleeve, can make leading screw 312 only move axially back and forth along itself, prevent this leading screw
312 rotations.In the present embodiment, guide 309 be guide finger, guide sleeve 305 be guiding pin socket, gathering sill 3051 along with
The axially in parallel direction of leading screw 312 extends forward.Secondary piston is connected with push rod and constitutes piston push rod 306, and secondary piston is located at liquid
In cylinder pressure cylinder body 307, constitute hydraulic cavities with the inwall of hydraulic cylinder body 307, the pipeline that this hydraulic cavities couples by screwed hole and
The front servo chamber A connection of manual cylinder 2, pusher section is located in ball-screw sleeve 303, is partly located in hydraulic cylinder body 307,
The rear end of push rod withstands on the front end face of leading screw 312.Piston push rod return spring 308 is located at secondary piston and hydraulic cylinder body 307
Front end face between.
Master cylinder 4 includes master cylinder body 401, master cylinder first piston 402, cover body 403, bolt 404, master cylinder second piston
405th, second piston return spring 406, first piston return spring 407 and sealing ring 408.Wherein, master cylinder first piston 402
Divide and be located at outside master cylinder body 401, as shown in figure 1, after the rearward end activity of master cylinder first piston 402 passes through master cylinder body 401
End face, arranges sealing ring 408 between master cylinder first piston 402 and master cylinder body 401, realizes master cylinder body by sealing ring 408
401 sealing.Master cylinder second piston 405 is located at the interior front of master cylinder body 401.Master cylinder first piston 402 and master cylinder second
Form the first high pressure chest between piston 405；Form second high between the front end face of master cylinder second piston 405 and master cylinder body 401
Pressure chamber, by promoting push rod 209, achievable master cylinder first piston 402 moves axially forward along master cylinder body 401.Master cylinder
It is coaxially arranged with first piston return spring 407, first piston return spring 407 between one piston 402 and master cylinder second piston 405
Two ends are contacted with master cylinder first piston 402, master cylinder second piston 405 respectively.Master cylinder second piston 405 and master cylinder body 401
It is coaxially arranged with second piston return spring 406 between front end face；Second piston return spring 406 two ends respectively with master cylinder body
401st, master cylinder second piston 405 contacts.Bolt 404,404, bolt are vertically fixed with the front end face of master cylinder first piston 402
Portion's step cooperation positioning and between cover body 403 face through after the top surface of a cover body 403, realizes cover body 403 in bolt 404 axial direction
Spacing.Cover body 403 bottom surface is positioned with the annular protrusion cooperation on the rear end face of master cylinder second piston 405.The length of above-mentioned bolt 404
Degree, more than the height of cover body 403, when being thus full of brake fluid inside the first high pressure chest, promotes the fortune of master cylinder first piston 402
Dynamic master cylinder second piston 405 can be driven to move, the now bolt 404 on master cylinder first piston 402 and cover body 403 and master cylinder the
Relative position between two pistons 405 is constant；And when the first high pressure chest internal detent liquid deficiency (leakage situation occurs), promote master
The motion of cylinder first piston 402, can make the bolt 404 on master cylinder first piston 402 move to and master cylinder second piston 405 rear end
After the contact of face, continue motion, and then promote master cylinder second piston 405 to move.Relative position on the side wall of above-mentioned cover body 403 is opened
There are inlet opening and liquid outlet, prevent brake fluid to be trapped in cover body 403, impact bolt 404 moves.
Brake pedal 1 is connected with push rod 201 by fulcrum post；Fluid reservoir 5, in addition to the hydraulic cavities with manual cylinder 2 are connected, is gone back
It is connected with the first high pressure chest of master cylinder 4 and the second high pressure chest respectively.First high pressure chest of master cylinder 4 and the second high pressure chest
Connected by brake piping 601,602 with hydraulic control unit 7 respectively.Hydraulic control unit 6 passes through brake piping and four wheels
Cylinder 7 is connected, that is, hydraulic control unit 6 pass through brake piping respectively with left back wheel cylinder 701, off hind wheel cylinder 702, left front wheel cylinder
703 are connected with off-front wheel cylinder 704.
Motor 301 is all connected with the electronic control unit 10 on vehicle with hydraulic control unit 6；Meanwhile, Electronic Control list
Unit 10 is also connected with PTS 11 and master cylinder pressure sensor 8 respectively；PTS 11 is arranged on braking
On pedal 1, for obtaining the displacement signal of brake pedal 1；Master cylinder pressure sensor 8 is arranged on master cylinder 4, for obtaining
First high pressure chest of master cylinder 4 or the pressure signal of the second high pressure chest.Thus, by electronic control unit 10 according to receiving
Vehicle-mounted other sensors 9 and PTS 11, master cylinder pressure sensor 8 collection signal, to motor 301 and hydraulic pressure
Control unit 6 is controlled, and realizes the selection of the braking mode of electro-hydraulic servo brakes, including active brake pattern, line traffic control
Braking mode, power brake pattern, and there is inefficacy backup manual braking's function.Below each mode of operation process is entered
Row explanation.
1st, active brake pattern
When electronic control unit 10 detects vehicle and has active brake demand, then select active brake pattern.For example, when
It is excessively near and will occur that electronic control unit 10 detects vehicle distances objects in front by wheel speed sensors and distance measuring sensor
During rear-end impact, active brake pattern can be selected.
Under active brake pattern, electronic control unit 10 controlled motor 301 output torque, drive ball screw assembly, to promote
Piston push rod 306 moves along a straight line, and the brake fluid of hydraulic pressure intracavity is passed through Pipeline transport to the front servo chamber A of manual cylinder 2, so that
The secondary piston 208 of manual cylinder 2 drives push rod 209 to travel forward, and makes the first high pressure chest of master cylinder 4 built-in with the second high pressure chest
Vertical pressure, and select all or part of wheel to implement braking by hydraulic control unit 6, and adjust each wheel cylinder 7 when necessary
Brake pressure.
2nd, brake-by-wire pattern
As shown in figure 1, when the stroke of brake pedal 1 is less, system works in brake-by-wire pattern.In brake pedal
1 incipient stage, pedal force is simulated spring 204 through pedal and is reached piston 205 after manual cylinder 2, and rear piston 205 travels forward and makes
Obtain its front leather cup to block the by-pass prot 2032 of manual cylinder 2.Now, if the cannelure 2021 of valve pipe 202 front portion not with manpower
Align in piston radial hole 2053 at the cannelure of rear piston 205 of cylinder 2, although manual cylinder ante-chamber B and manual cylinder piston cavity D
It is connection, but they are in cut-off state with manual cylinder back cavity C.Therefore, in manual cylinder ante-chamber B and manual cylinder piston cavity D
Brake fluid be in air-tight state, lead to the rear piston 205 of manual cylinder 2 to be in lockup state, pedal force is also thus without passing to
Secondary piston 208, that is, brake pedal 1 and wheel drag are in decoupled state.Under the brake-by-wire pattern of little pedal travel, car
Brake force needed for wheel brake is generally provided by Electrohydraulic servo cylinder 3.Its concrete mechanism is：Electronic control unit 10 receives
Required brake force and corresponding servomotor electric current is calculated to after the signal of PTS 11, and to 301, motor
Send instruction to make it rotate output torque, drive ball screw assembly, to promote piston push rod 306 to move along a straight line, by the braking of hydraulic pressure intracavity
Liquid passes through Pipeline transport to the front servo chamber A of manual cylinder 2, so that the secondary piston 208 of manual cylinder 2 drives push rod 209 to transport forward
Dynamic, so that master cylinder 4 is set up oil pressure and implement wheel braking.
Under On-line Control dynamic model formula, when pedal travel be increased to make the cannelure 2021 of valve pipe 202 and manual cylinder 2 after
When alignment in piston radial hole 2053 at the cannelure of piston 205, manual cylinder piston cavity D is connected with manual cylinder back cavity C.Now
Because manual cylinder back cavity C is also connect with fluid reservoir 5, therefore the brake fluid in manual cylinder ante-chamber B and manual cylinder piston cavity D is rear
Fluid reservoir 5 is flow back under the effect of piston 205 pressure；Meanwhile, after being in lockup state under On-line Control dynamic model formula
Piston 205 is moved forward, thus brake pedal force is reached secondary piston 208.Pedal travel increases and makes rear piston 205 not
It again is at lockup state it is meant that brake-by-wire pattern terminates, the working condition of system switchs to power brake pattern.
For the electric automobile with braking energy recovering function or hybrid vehicle, the present invention has multiple work
The electro-hydraulic servo brakes of pattern can implement composite braking, and that is, ground brake force is by regenerative braking and/or electro-hydraulic servo friction
Braking cooperation produces.When electronic control unit 10 detects brake pedal 1 and is operated, if the energy storage device of energy source of car system
(as battery) allows energy storage (charging for battery), and it is desired enough to produce to only rely on the brake force of regenerative braking generation
Braking deceleration, then electronic control unit 10 selection braking mode, and do not worked by the frictional damping that motor 301 drives；
Otherwise, electronic control unit 10 controlled motor 301 output torque, makes master cylinder 4 output pressure to wheel cylinder 7 auxiliary friction system
Dynamic, with the brake force required for supplying, this is the parallel schema that frictional damping is worked with regenerative braking simultaneously.However, working as automobile
The energy storage device of energy resource system do not allow to charge or regenerative braking energy regenerating efficiency very low when, regenerative braking not work
Make, required ground brake force then all drives wheel cylinder 7 to produce by motor 301.
3rd, power brake pattern
When pedal travel increase to make the cannelure 2021 of valve pipe 202 and manual cylinder 2 after piston 205 cannelure at
During the alignment of piston radial hole 2053, the lockup state because of the rear piston 205 of manual cylinder 2 is released, and brake pedal force can pass
To secondary piston 208, the working condition of system switchs to power brake pattern.Its concrete mechanism is：Driver steps on braking and steps on
Plate 1 and pedal travel are wide enough so that the work at the cannelure 2021 of valve pipe 202 and the cannelure of rear piston 205 of manual cylinder 2
During plug radial hole 2053 alignment, the rear piston 205 of manual cylinder 2 lockup state under little pedal travel is released, and braking is stepped on
Plate power all reaches secondary piston 208, thus promoting master cylinder first piston 402 to move so that master cylinder produces brake pressure；Meanwhile,
The stroke signal of the brake pedal 1 that electronic control unit 10 gathers according to brake-pedal-travel sensor 11, and according to setting in advance
Fixed assist characteristic curve calculates the power torque of motor 301, drives ball screw assembly, to promote piston push rod 306 straight line fortune
Dynamic, the brake fluid of hydraulic pressure intracavity is passed through Pipeline transport to the front servo chamber A of manual cylinder 2, applies power-assisted in secondary piston 208.Help
Under force mode, manual cylinder 2 and Electrohydraulic servo cylinder 3 work simultaneously, in the brake force of brake pedal 1 and the driving force effect of motor 301
Under, set up brake pressure in the first high pressure chest of master cylinder 4 and the second high pressure chest, make the braking of first, second high pressure intracavity
Liquid exports to four wheel cylinders 7 through hydraulic control unit 6, realizes electro-hydraulic servo power brake.
4th, lost efficacy backup manual braking's pattern
When the electronic control unit 10 in the electro-hydraulic servo brakes with multiple-working mode, hydraulic control unit 6
Or PTS 11, master cylinder pressure sensor 8 are when breaking down, still certain Brake Energy can be ensured by manual braking
Power.For example, if hydraulic control unit 6 lost efficacy, now hydraulic control unit 6 carries out pressure controlled function forfeiture, but still can send out
Wave electrodynamic braking power-assisted, brake-by-wire and active brake function.In the limiting case, watch when having the electro-hydraulic of multiple-working mode
When system of mourning moves system power supply inefficacy, now frame for movement still ensures that Braking system.Driver steps on brake pedal 1, through manual cylinder 2
Push rod 201 overcome the elastic-restoring force that pedal simulates spring 204 to drive clamping device 211 mobile with valve pipe 202, when eliminate with
After promoting behind gap between piston 205 afterwards, piston 205 moves, until pushing directly on secondary piston 208 after contacting with secondary piston 208
Motion, transmits the force to master cylinder first piston 402 through locking nut 210, push rod 209, promotes master cylinder first piston 402 to transport forward
Dynamic, thus implementing manual braking.
Above-described embodiment is only that technology design of the present utility model and feature are described, its object is to allow and is familiar with technique
Personage will appreciate that content of the present utility model and implement according to this, protection domain of the present utility model can not be limited with this,
All equivalence changes made according to this utility model spirit or modification, all should cover protection domain of the present utility model it
Interior.
Claims (10)
1. a kind of electro-hydraulic servo brakes with multiple-working mode it is characterised in that：Including brake pedal, manual cylinder,
Electrohydraulic servo cylinder, master cylinder, fluid reservoir, master cylinder pressure sensor, hydraulic control unit, wheel cylinder, motor, Electronic Control list
Unit, brake-pedal-travel sensor；Wherein：
Described manual cylinder include push rod, back casing, rear piston, valve pipe, clamping device, pedal simulation spring, procapsid, secondary piston,
Piston return spring, push rod afterwards；Described valve pipe is located in described back cover body and is coupled with described clamping device, the rear end of described push rod
Portion is connected with described brake pedal, and the leading section of described push rod embeds in described clamping device；Described rear piston is located at described back cover
The front end of internal and described rear piston is fixed with the piston rod that activity penetrates described procapsid；Described pedal simulation spring is located at institute
State between valve pipe and described rear piston；Described rear piston return spring is located between described rear piston and described back casing；Described
Servo chamber after constituting between the front end face of piston and described back casing and described valve pipe afterwards, does not step on described in during described brake pedal
Servo chamber is connected with described fluid reservoir by the compensation hole being opened on described back casing afterwards；The rear portion of described push rod is located at described
Couple in fore shell body and with described secondary piston；Servo chamber before constituting between the rear end face of described secondary piston and described procapsid；
Described Electrohydraulic servo cylinder include motor, ball-screw sleeve, piston push rod, hydraulic cylinder body, piston push rod return spring,
Rolled thread nut, leading screw；Described rolled thread nut only can be arranged in described ball-screw sleeve around itself axial rotation, described electricity
The output shaft of machine is in transmission connection with described rolled thread nut；Described rolled thread nut constitutes ball screw assembly, described silk with described leading screw
Thick stick only can be along coordinating in described rolled thread nut with itself moving axially back and forth；The rear end of described piston push rod withstands on described leading screw
Front end on, the front end of described piston push rod is fixed with secondary piston, described secondary piston be located at described hydraulic cylinder body in, described work
Plug push rod return spring is located between described secondary piston and the front end face of described hydraulic cylinder body, described secondary piston and described hydraulic pressure
Hydraulic cavities are constituted, described hydraulic cavities are passed through pipeline and connected with the described front servo chamber of described manual cylinder between the rear end face of cylinder cylinder body
Logical；
Described master cylinder includes master cylinder body, master cylinder first piston, master cylinder second piston, first piston return spring and second
Piston return spring；The rearward end activity of described master cylinder first piston passes through the rear end face of described master cylinder body, described master cylinder the
Two pistons are located at the interior front of described master cylinder body；Form the between described master cylinder first piston and described master cylinder second piston
One high pressure chest, forms the second high pressure chest between described master cylinder second piston and the front end face of described master cylinder body；Described push rod
Front end withstands on described master cylinder first piston；Described fluid reservoir respectively with described first high pressure chest and described second high pressure chest phase
Even；
Described first high pressure chest is connected with described hydraulic control unit by brake piping respectively with described second high pressure chest, described
Hydraulic control unit is connected by brake piping with described wheel cylinder；Described master cylinder pressure sensor is arranged on described master cylinder
On, described brake-pedal-travel sensor is arranged on described brake pedal, described electronic control unit respectively with described motor,
Described master cylinder pressure sensor is connected with described brake-pedal-travel sensor, and described electronic control unit receives described braking
The displacement signal of brake pedal and described first height of described master cylinder pressure sensor acquisition that PTS obtains
Pressure chamber or the pressure signal of described second high pressure chest, and control the output torque of described motor.
2. a kind of electro-hydraulic servo brakes with multiple-working mode according to claim 1 it is characterised in that：Institute
State Electrohydraulic servo cylinder and also include guide and guide sleeve, described guide is fixed on described leading screw, described guide sleeve
Extend, along with described leading screw axially in parallel direction, the gathering sill offering with the cooperation of described guide on cylinder.
3. a kind of electro-hydraulic servo brakes with multiple-working mode according to claim 1 it is characterised in that：Institute
State and bolt be vertically fixed with the front end face of master cylinder first piston, the head of described bolt pass through after the top surface of a cover body with described
Step cooperation positioning on the top surface of cover body, the bottom surface of described cover body is fixed on the rear end face of described master cylinder second piston, institute
The length stating bolt is more than the height of described cover body.
4. a kind of electro-hydraulic servo brakes with multiple-working mode according to claim 3 it is characterised in that：Institute
State and inlet opening and liquid outlet are offered on the side wall of cover body.
5. a kind of electro-hydraulic servo brakes with multiple-working mode according to claim 1 it is characterised in that：Institute
State rear servo chamber to include by the manual cylinder ante-chamber constituting between described rear piston and the front end face of described back casing, by described rear alive
The manual cylinder piston cavity being formed between plug and described valve pipe；The rear portion of described rear piston be provided with backward opening and with described valve pipe
Leading section grafting cooperation centre bore, form described manpower between the front end face of described valve pipe and the bottom surface of described centre bore
Cylinder piston cavity；It is communicated with described manual cylinder piston cavity and the through hole of described manual cylinder ante-chamber in described piston rod.
6. a kind of electro-hydraulic servo brakes with multiple-working mode according to claim 5 it is characterised in that：Institute
State the piston axial hole that through hole includes extending forward in described centre bore, and connect described piston axial hole and described manpower
The piston rod radial hole of cylinder ante-chamber.
7. a kind of electro-hydraulic servo brakes with multiple-working mode according to claim 5 it is characterised in that：Institute
Annular groove is offered on the outer peripheral face stating rear piston, between described rear piston and the inwall of described back casing, constitutes the people of annular
Power cylinder back cavity；It is further opened with connecting the piston radial hole of described centre bore and described manual cylinder back cavity on described rear piston, described
The cannelure in corresponding described piston radial hole is offered on the front periphery face of valve pipe, the front portion of described valve pipe is further opened with connecting
The valve pipe axial hole of described centre bore and described cannelure.
8. a kind of electro-hydraulic servo brakes with multiple-working mode according to claim 5 it is characterised in that：Institute
State and by-pass prot is further opened with back casing, described by-pass prot is located at rear side, described by-pass prot and the described compensation in described compensation hole
Hole is connected with described fluid reservoir by same brake piping；Do not step on described by-pass prot during described brake pedal to be lived afterwards by described
The anterior side of plug is blocked.
9. a kind of electro-hydraulic servo brakes with multiple-working mode according to claim 1 it is characterised in that：Institute
State clamping device to be threaded connection with described valve pipe, between described clamping device and described valve pipe, be additionally provided with cushion block.
10. a kind of electro-hydraulic servo brakes with multiple-working mode according to claim 1 it is characterised in that：
The rearward end of described push rod is threaded connection with described secondary piston, and described push rod is also threaded with locking nut.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620996655.3U CN205971268U (en) | 2016-08-30 | 2016-08-30 | Electricity liquid servo braking system all with multiple mode |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620996655.3U CN205971268U (en) | 2016-08-30 | 2016-08-30 | Electricity liquid servo braking system all with multiple mode |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205971268U true CN205971268U (en) | 2017-02-22 |
Family
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620996655.3U Withdrawn - After Issue CN205971268U (en) | 2016-08-30 | 2016-08-30 | Electricity liquid servo braking system all with multiple mode |
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| Country | Link |
|---|---|
| CN (1) | CN205971268U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106218619A (en) * | 2016-08-30 | 2016-12-14 | 邓伟文 | A kind of electro-hydraulic servo brakes with multiple-working mode |
-
2016
- 2016-08-30 CN CN201620996655.3U patent/CN205971268U/en not_active Withdrawn - After Issue
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106218619A (en) * | 2016-08-30 | 2016-12-14 | 邓伟文 | A kind of electro-hydraulic servo brakes with multiple-working mode |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20170222 Effective date of abandoning: 20181102 |