CN105835857A - Automotive brake-by-wire device provided with flexible redundancy mechanism - Google Patents
Automotive brake-by-wire device provided with flexible redundancy mechanism Download PDFInfo
- Publication number
- CN105835857A CN105835857A CN201610224450.8A CN201610224450A CN105835857A CN 105835857 A CN105835857 A CN 105835857A CN 201610224450 A CN201610224450 A CN 201610224450A CN 105835857 A CN105835857 A CN 105835857A
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- China
- Prior art keywords
- brake
- wheel
- clutch
- drive
- flexible
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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
- B60T11/00—Transmitting braking action from initiating means to ultimate brake actuator without power assistance or drive or where such assistance or drive is irrelevant
- B60T11/04—Transmitting braking action from initiating means to ultimate brake actuator without power assistance or drive or where such assistance or drive is irrelevant transmitting mechanically
- B60T11/046—Using cables
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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
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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
- B60T2270/82—Brake-by-Wire, EHB
Abstract
The invention discloses an automotive brake-by-wire device provided with a flexible redundancy mechanism. The automotive brake-by-wire device comprises a brake input part, a brake output part, a brake control part and a flexible transmission part, wherein the flexible transmission part comprises an actuating wheel, an intermediate transmission mechanism and two bidirectional controllable clutch mechanisms, a redundancy brake assisting mode can be realized when a brake-by-wire system is in a failure state, and the braking maneuver convenience is kept to the greatest extent; the device can be switched to flexible transmission under extreme conditions such as system power failure and the like, a pedal brake mode is realized, dependence on electric power and hydraulic pressure is avoided, and the safety is guaranteed fundamentally.
Description
Technical field
The present invention relates to a kind of brake-by-wire device, particularly relate to a kind of automotive line control having and can realizing multi-mode flexibility redundancy
Dynamic device.
Background technology
Automobile brake-by-wire (BBW) set electron parking braking (EPB), electronic stability control (ESP), electronic braking force
Distribution (EBD), deceleration of electrons auxiliary (EBA), braking anti-lock (ABS), automatic emergency brake (AEB) etc. with
Brake relevant technology, there is compared with conventional hydraulic brakes the advantages such as fast response time, pedal force is adjustable, pole
Improve braking portability, control stability and active safety in big degree, represent automotive safety, the developing direction of intelligence.
But thing followed problem is the reliability how ensureing system self, i.e. breaks down when Mechatronic Systems, power-supply system etc.
Time how to ensure that driver realizes control for brake by brake pedal.The most the more commonly used way is to use: 1, electric-control system
Redundancy；2, conventional hydraulic redundancy.Method 1 use stand-by power supply, bi-motor, double ECU, dual sensor etc. two set or
The electronic installation of above quantity, it is impossible to the potential safety hazard that fundamentally the solution fault of electronic system own is brought, and whole system
Volume is big, it is complicated to control, cost height, not easy care etc.；Method 2 is general increases electric control in original brake fluid system
Dynamic executor, utilizes brake fluid system as standby, and space is arranged still as brake fluid system, it is impossible to embody line traffic control
The feature of system flexible arrangement, and hydraulic redundancy self there is also the incipient fault that oil circuit is revealed.
Summary of the invention
The technical problem to be solved in the present invention is the problem overcoming prior art to exist, it is provided that a kind of vehicle wire with flexible redundancy
Control brake unit, premised on improving reliability, it is intended to realizes keeping pedal brake same with non-faulting brake under malfunction
Time provide braking moment, it is achieved redundancy brake boost pattern, at utmost keep braking maneuver portability；Occur in Mechatronic Systems
Fault cannot work or under the extreme case of power cut-off, and device is changeable for Flexible Transmission, it is achieved pedal brake pattern, from root
Safety is guaranteed on Ben；
For solving the problems referred to above, the technical solution used in the present invention is: provide a kind of vehicle wire with flexible redundant unit to control
Dynamic device, comprising:
One braking importation, it includes that one is applied in pedal sense simulator and the electronic pedal of sensor, braking input
On this electronic pedal；
One brake output section is divided, and it includes the brake with actuator, drive mechanism, clearance adjustment mechanism and sensor, system
Dynamic device is connected with wheel holding work respectively, braking input the braking moment determined is applied on wheel by direct or indirect；
One control for brake part, it includes a control unit and a failure diagnosis unit, and control unit is passed through with failure diagnosis unit
Vehicle bus communicates, according to the braking operation pattern that the status command control realization received is different；
One Flexible Transmission part, it includes executing the two-way controllable clutch mechanism of driving wheel, an intermediate transmission mechanism and two, executes driving wheel
Centre bore is affixed with electronic pedal rotating shaft, executes the driving wheel intermediate transmission wheel with intermediate transmission mechanism directly or indirectly through flexible member
Connect；The left and right drive of intermediate transmission mechanism respectively and two two-way controllable clutch mechanisms outer clutch driving wheel directly or
Connected flexible member to connect；Two-way controllable clutch mechanism is installed between a pair rotary drive pair of brake drive mechanism, its from
Closing turning wheel affixed with driving pair element, in its clutch, star-wheel is affixed with driven secondary element.
Wherein the left and right drive of intermediate transmission mechanism, intermediate transmission wheel are arranged on jackshaft by bearing, left and right transmission
Wheel takes turns interference fits respectively with intermediate transmission, and by bonded, three is coaxial.
Formed some uniform to circumference in the clutch of the most two-way controllable clutch mechanism outside star-wheel inside drive outer with clutch
Wedge shape space pair, two wedge shape narrow spaces of each wedge shape space centering are relative, and a pair roller of interior installation, roller is pre-through spring
Tightly making in the outer drive inward facing surface of itself and clutch and clutch work surface outside star-wheel contact, every pair of roller is by clutch turning wheel
Shift fork separates, clutch turning wheel and star-wheel matched in clearance in clutch.
Wherein being cased with respectively on the wire digging line of the left and right drive of intermediate transmission mechanism adjusting spring, the one end adjusting spring is fixed
In housing, the other end compresses and adjusts screwed pipe, adjusts screwed pipe one end and shell bores matched in clearance, and the other end has external screw thread,
Coordinate with adjusting nut, locking nut, withstand wire digging line sleeve cap by adjusting nut.
The clutch turning wheel shift fork of the most two-way controllable clutch mechanism is adjacent roller in a free state and has the most unidirectional
Gap, the frictional force that roller produces during wedging in wedge shape space, more than directly or indirectly dragging the suffered resistance of power-off actuator idle running,
Directly act on less than actuator or the stalling torque of indirect transfer.
Wherein its angular travel of electronic pedal is through executing the outer drive of clutch of driving wheel, intermediate transmission mechanism, two-way controllable clutch mechanism
Value after transmission, drives the outer drive of clutch of two-way controllable clutch mechanism that brake gap institute is completely eliminated more than actuator
The angle value turned over.
The most two-way controllable clutch mechanism is installed in non-steering wheels brake, and the vehicle for four-wheel steering is then installed on trailing wheel system
In dynamic device.
Wherein control system is provided with braking switching switch, connects power supply and actuator, and this switch is placed in steering wheel or steering column or master
On control plate, instrumental panel is provided with the display lamp of correspondence.
Compared with prior art the invention has the beneficial effects as follows:
Redundancy transmission, not against electric power, hydraulic pressure, can realize brake-by-wire, redundancy brake boost, 3 kinds of mode of operations of pedal brake,
There is reliability height, brake light advantage.
Can assemble after simple transformation with existing brake-by-wire device, constitute the flexible redundancy brake-by-wire system with above-mentioned functions
System, has simple in construction, convenient, flexible feature；
Accompanying drawing explanation
With reference to the explanation of the preferred implementing form of accompanying drawings below, understand the present invention with will become more apparent that.But, form of implementation and accompanying drawing
For simple diagram and explanation, shall not be applied to limit the scope of the present invention, the scope of the present invention is determined by claims.
Fig. 1 is the overall structure decomposing schematic representation of the present invention, for annexation between system each assembly critical piece being described and being
The basic function of system.
Fig. 2 is intermediate transmission mechanism structural representation of the present invention, is used for its basic structure and operation principle are described.
Fig. 3 is the present invention two-way controllable clutch mechanism structure schematic diagram, is used for its basic system and operation principle are described.
Fig. 4 is flexible drive mechanism operation principle schematic diagram of the present invention, for solving the operation principle of release system.
Detailed description of the invention
According to Fig. 1～Fig. 4, the preferred embodiment of the present invention is illustrated.
Fig. 1 represents the overall structure decomposing schematic representation of the present invention.Electronic pedal 10 with pedal sense simulator and sensor
Being installed in car steering indoor metal vehicle body appropriate position, its rotating shaft, with to execute driving wheel 1 bonded, executes the outer protected cover of driving wheel 1
11, it is installed on electronic pedal 10 body by bolt；Intermediate transmission mechanism 2 is arranged in housing 9 by bearing, shell
Body 9, according to the special case of automobile chassis, selects appropriate location to be installed on automobile metal vehicle body；Two-way controllable clutch mechanism 3,
4 are respectively arranged between non-steering wheels brake power train two transmission, and the assembly of drive gear constituted is respectively arranged in casing
7, within 8, casing 7,8 is installed on braking executive component respectively by bolt, and for the present embodiment, executive component is system
Dynamic clamp 5,6；Execute between driving wheel 1 and intermediate transmission mechanism 2, intermediate transmission mechanism 2 and two-way controllable clutch 3,4 soft
Property connect, flexible axle or wire digging line can be used, the present embodiment is automobile-used wire digging line 12,13,14, figure is drawn with two point
Line represents.
Under normal operation, system is in brake-by-wire pattern, steps on electronic pedal 10 by foot and gives target rotation angle, controls
System controls actuator and through drive mechanism, braking moment is passed to brake caliper 5,6 by two-way controllable clutch mechanism 3,4；
Meanwhile, electronic pedal 10 drives that executing moves in turn 1 drives intermediate transmission mechanism 2, intermediate transmission mechanism 2 to pass through through wire digging line 12
Wire digging line 13,14 drives two-way controllable clutch mechanism 3,4, and herein, two-way controllable clutch mechanism 3,4 realizes foot-operated mesh
Mark input output actual with actuator separates, and two-way transmission is non-interference, and the load that electronic pedal 10 bears is by pedal sense mould
Intending device to provide, it is achieved pedal sense is adjustable, the actual loading of braking is controlled actuator output power by system and overcomes, it is achieved by force
The function such as ABS, ESP under the unconventional operating mode such as braking, high speed steering, skid steer.
By actuator improper stall, system self cannot be corrected under the brake fade state caused any, can pass through driver
Manually clicking on braking switching switch, cut off the actuator power supply of brake, now flexible redundant unit is in running order；
In addition to the conditions already mentioned, flexible redundant unit can get involved duty automatically, is included in the extreme condition of system power supply fault.Soft
Property redundant unit's work time, foot steps on electronic pedal 10, drives that executing moves in turn 1 drives intermediate transmission mechanism 2 through wire digging line 12,
Intermediate transmission mechanism 2 drives two-way controllable clutch mechanism 3,4 by wire digging line 13,14, and now, motor power-off is in certainly
By state, braking moment can be delivered to brake caliper 5,6 through drive mechanism by two-way controllable clutch mechanism 3,4, it is achieved foot-operated
Braking.
In above process, if side non-steering wheels brake troubles, then pedal brake moment by intermediate transmission mechanism 2 through steel
Silk drag-line 13 or 14 drives two-way controllable clutch mechanism 3 or 4 to be delivered to brake caliper 5 or 6；If non-steering wheels both sides system
The dynamic whole fault of device, then pedal brake moment is driven two-way controllable clutch machine by intermediate transmission mechanism 2 through wire digging line 13,14
Structure 3,4 is delivered to brake caliper 5,6.In above-mentioned two situations, pedal brake is not done with the motion of other normal brake application devices
Relating to, pedal brake and electrodynamic braking work simultaneously, can realize the redundancy brake boost under malfunction.
Fig. 2 is intermediate transmission mechanism structural representation of the present invention.It is axial that intermediate transmission mechanism overall structure takes turns 20 with intermediate transmission
Center is symmetrical, describes its structure and operation principle, right drive 23 on the right side of it as a example by axis of symmetry left part in detail
Same, do not repeat.Intermediate transmission wheel 20, Left Drive wheel 21 are installed on jackshaft 22, intermediate transmission by bearing
Wheel 20 and Left Drive take turns 21 interference fits, it is ensured that certain axiality, and by bonded.This left and right drive with in
Between the advantage of drive split-type structural be: different drive ratios can be realized by changing the left and right drive of different radii,
Meet the needs of different vehicle.
As preferably, the present embodiment use automobile-used wire digging line as flexible drive element, wire digging line include steel wire rope, sleeve pipe,
Sleeve cap, sheath, joint etc., structure refers to the description of product of industry standard or other suppliers.The steel wire rope of wire digging line
12a, 12b are wrapped in intermediate transmission and take turns on the spiral guide slot of 20 outer surfaces, and end is fixed by joint 12c, 12d respectively
In the groove that intermediate transmission is taken turns outside 20 end faces, wire digging line monolayer is arranged, the number of turns being wound around meets under setting gear ratio
Realize the required maximum angle stroke of braking, the steel wire rope executing driving wheel 1 in Left Drive wheel 21, right drive 23 and Fig. 1 arranges,
Install identical with said structure.
For ensureing that under Flexible Transmission, foot-operated braking moment is in the coordination of left and right drive, it is to avoid single wheel brake clearance disappears in advance
After removing, opposite side can not continue to braking moment, and the steel wire rope the most also caused for automatically compensating summer in winter variations in temperature stretches and becomes
Shape, is provided with adjusting apparatus on the wire digging line of left and right drive.With the steel wire rope 12a on Left Drive wheel 21 in Fig. 2 it is
Example illustrates, right drive 23 is identical with its structure, does not repeats.Adjusting spring 12f to be enclosed within adjustment screwed pipe 12e, one end is solid
Due to housing 9, adjustment screwed pipe 12e is withstood in one end, adjusts screwed pipe 12e one end and housing 9 installing hole matched in clearance, the other end
Processing screw thread, equipped with adjusting nut 12h and locking nut 12g, adjusting nut props up wire digging line sleeve cap 12i, by rotation
Turn adjusting nut 12h and regulate pretightning force, and locked by locking nut 12g.After adjusting, left and right at flexible drive mechanism
When drive simultaneously participates in work, if the leading stop owing to wheel braking gap eliminates of right drive, at this moment, pedal brake
Moment continues to, and forces steel wire rope 12a to oppress wire digging line sleeve pipe 12j, and drives sleeve cap 12i to extrude adjusting nut 12h,
Make it promote adjustment screwed pipe 12e compression to adjust spring 12f, then steel wire rope 12a can trace movement further, it is achieved Left Drive wheel
Continuing to braking moment, the braking moment completing left and right drive is coordinated, and the adjustment process of the first stop of Left Drive wheel is in like manner.
Additionally due to the steel wire rope micro-strain amount that summer in the winter temperature difference causes, also can the most automatically compensate.
Fig. 3 is the present invention two-way controllable clutch mechanism structure schematic diagram.Left and right two-way controllable clutch mechanism knot described in the present embodiment
Structure is identical, and this describes its structure and operation principle, right two-way controllable clutch mechanism in detail as a example by sentencing left two-way controllable clutch mechanism
Same, do not repeat.Outer drive 31a is coaxial with star-wheel 31c in left clutch in left clutch, inside it with in left clutch
Some wedge shape spaces pair uniform to circumference, two wedge shape narrow space phases of each wedge shape space centering are formed outside star-wheel 31c
Right, a pair roller of interior installation, roller makes itself and star in the outer drive 31a inward facing surface of left clutch and left clutch through spring pre-tightening
Work surface contact outside wheel 31c, every pair of roller is separated by the shift fork of left clutch turning wheel 31b, for alleviating work abrasion, spring
Can be provided with top cap with roller-contact end, top cap and roller-contact face are inner cylinder shape, fit with cylindrical roller, top cap material hardness
Less than roller surface hardness, roller surface hardness is less than work outside star-wheel 31c inside the outer drive 31a of left clutch and in left clutch
Make surface hardness.Left clutch turning wheel 31b and star-wheel 31c matched in clearance in left clutch, be equipped with keyway, can be with brake transmission
Drive system part is bonded.As preferably, in the present embodiment, left clutch turning wheel 31b is bonded with actuator 50, left clutch
Interior star-wheel 31c is bonded with driving member 51, and driving member 51 and other driving members of brake drive mechanism keep being in transmission connection.Left
The outer layout of steel wire rope of drive 31a of clutch, installation form are identical, herein with the mechanism form of Fig. 2 intermediate transmission wheel 20
Do not repeat.
When the left clutch of left two-way controllable clutch mechanism outer drive 31a active, if the most left clutch turning wheel 31b is in
Unloaded free state, the outer drive 31a of left clutch drives side roller to roll to wedge shape space narrow side, makes roller wedging, then left
By star-wheel 31c in the left clutch of drive of wedging roller, clockwise or counterclockwise, the roller of wedging pushes away the outer drive 31a of clutch
The shift fork of the dynamic left clutch turning wheel 31b being in unloaded free state, drives left clutch turning wheel 31b clockwise together or the inverse time
Pin rotates；If the most left clutch turning wheel 31b stall, its shift fork stops at the roller of wedge shape space wedging so that it is solve wedge,
The most left clutch outer drive 31b idle running；If the most left clutch turning wheel 31b is clockwise or counterclockwise, then its shift fork is all
Can promote at the roller of wedge shape space wedging so that it is solve wedge, outer drive 31a and the left clutch turning wheel 31b of left clutch is each
Operating, non-interference.
For realizing above-mentioned functions, the design of two-way controllable clutch mechanism to possess certain condition:
One, the clutch turning wheel shift fork of two-way controllable clutch mechanism is adjacent roller in a free state and has the most unidirectional
Gap, the frictional force that roller produces during wedging in wedge shape space, more than directly or indirectly dragging the suffered resistance of power-off actuator idle running,
Directly act on less than actuator or the stalling torque of indirect transfer；
Two, under above-mentioned condition limits, the structure ginseng such as described two-way controllable clutch mechanism roller number, the angle of wedge of wedge shape space
Number refers to mechanical design handbook design and chooses.
Fig. 4 is flexible drive mechanism operation principle schematic diagram of the present invention.This figure only represents the motion transitive relation between parts, not
Represent its actual ratio and position.Fig. 4 mid portion represents that intermediate transmission mechanism schematic diagram, Fig. 4 right part represent left two-way
Schematic diagram partly cuts open in controllable clutch mechanism, and right part operation principle corresponding to said mechanism is identical with left side, the most only with left side
Being divided into example to illustrate its operation principle, right part does not repeats.
In normal operating conditions, driver steps on electronic pedal 10, drives and executes driving wheel 1 with a certain angle of fixed angular speed rotation
Degree, meanwhile, electronic pedal sensor measurement to corresponding signal passes to controller, and controller combines other sensor informations with one
Fixed control law controls actuator and drives brake geartrain components to rotate to an angle with a fixed angular speed, owing to electronics is stepped on
Plate 10 needs to overcome certain system lash during stepping on, rubs, damps and system variant etc., causes it to have micro-
Little idle stroke, and the resolution of sensor guarantees to measure this idle stroke and pass to controller, controller just can be first
Made actuator run before the effective action of electronic pedal 10, and made up by actuator to braking execution by backoff algorithm
Interelement system lash, friction etc., its result is: moving after the actually active motion of actuator and first send out, system exists two biographies
Dynamic loop, a road: driven left clutch turning wheel 31b to rotate by actuator output shaft 50a by key, the most left clutch turning wheel
31b promotes roller to drive star-wheel 31c in left clutch, and in left clutch, star-wheel 31c drives actuated element such as gear or synchronization by key
Belt wheels etc. finally drive brake actuator to realize braking, and the most left clutch out star wheel 31a is in free state；One tunnel: by electricity
Sub-pedal 10 drives and executes driving wheel 1, executes driving wheel 1 and drives intermediate transmission wheel 20, intermediate transmission wheel 20 to lead to by wire digging line 12
Crossing key drives Left Drive wheel 21 to synchronize motion, and Left Drive wheel 21 drives the outer drive 31a of left clutch by wire digging line 13
It is allowed to be transferred to idling conditions by free state.Herein, two-way controllable clutch mechanism realizes riding to setting the goal input with actuator in fact
Border output separates, as long as under system normal condition, two-way transmission is non-interference, and the load that electronic pedal 10 bears is by pedal sense
Feeling that simulator provides, it is achieved pedal sense is adjustable, the actual loading of braking is controlled actuator output power by system and overcomes, by force
Under the unconventional operating modes such as braking, high speed steering, skid steer, need four-wheel independent brake is controlled, perform ABS, ESP
Etc. function, and now foot-operated input is non-interference with actuator output motion, it is ensured that the realization of brake-by-wire normal function.
Under nonserviceabling, when system fault diagnosis unit detects that the non-steered wheel in left side or right side non-steered wheel brake go out
During existing fault, by control unit, fault side actuator can be cut off power supply so that it is be in free state；Work as system fault diagnosis
When unit cannot be diagnosed to be fault, artificial compulsory withdrawal brake-by-wire state, the work of all brakes can be switched by braking switching
Dynamic device dump, is in free state；When system power supply breaks down and cannot power, the actuator of all brakes is lost
Electricity is in free state.
When the actuator of the non-steered wheel in left side is in free state, through the outer transmission of left clutch that electronic pedal 10 finally drives
Wheel 31a continues motion, and drives side roller to roll to wedge shape space narrow side, makes roller wedging, the outer drive of the most left clutch
In 31a drives left clutch by wedging roller, star-wheel 31c rotates, and is now in free state due to actuator output shaft 50a,
The roller solution wedge of wedging cannot be driven idle running, star-wheel in left clutch by the shift fork of the left clutch turning wheel 31b bonded with it
Pedal brake moment is delivered to brake caliper through the driving member bonded with it by 31c, now two steered wheels and right side is non-turns to
Wheel braking moment is still controlled actuator output by control system, it is achieved the redundancy brake boost under malfunction；In like manner, when left,
When the actuator of the non-steered wheel in right both sides is in free state, finally drive left and right two-way controllable clutch machine through electronic pedal
Star-wheel in the left-right clutch of structure, braking moment is delivered to the brake caliper of correspondence by the driving member that the two drive each connects, as
The really leading stop in side, the adjusting apparatus arranged on the wire digging line of left and right drive work, it is achieved both sides are all braked.This
Time two non-steered wheel braking moments still by brakes control actuator output, still ensure that the redundancy system realized under malfunction
Dynamic power-assisted；
When being in non-brake-by-wire state, the actuator of all brakes is in power-off free state, and now, deflecting roller loses
Stopping power, braking moment only by electronic pedal by wire digging line through intermediate transmission mechanism drive non-steered wheel left and right from
Star-wheel in closing, the two drives the driving member each connected that braking moment is delivered to the brake caliper of correspondence, it is achieved pedal brake.
As this preferred embodiment, the determination of its system major parameter refers to as follows:
According to vehicle parameter and the requirement of China's automobile brake specification, can calculate and determine the output maximum braking of brake executive component
Pressure is set to Nmax, in conjunction with brake and power train concrete structure thereof, maximum braking moment can be calculated further and be set to Mmax,
In static state ideally, if the gear ratio of brake power train is i0, then the stalling torque M of actuatord≥Mmax/i0, Zuo Shuan
To controllable clutch mechanism torque M allowable3≥Mmax/i0, right two-way controllable clutch mechanism torque M allowable4=M3；Intermediate transmission machine
The gear ratio of structure Left Drive wheel drive outer with the left clutch of a left side two-way controllable clutch mechanism is set to i23, the right transmission of intermediate transmission mechanism
Wheel is set to i with the gear ratio of drive outside the two-way controllable clutch mechanism of the right side24, due to symmetrical configuration, i herein23=i24, then middle biography
The torque M of motivation structure2=2 × M3/i23；The gear ratio executing driving wheel and intermediate transmission mechanism intermediate transmission wheel is set to i12, then driving wheel is executed
Opplied moment is M1=M2/i12If the torque arm length of electronic pedal is l, then maximum pedal force Fmax=M1/l.Consider dynamic feelings
Condition and system effectiveness, above-mentioned calculating can theoretical analysis and calculation further, it is possible to use empirical method conventional in engineering, above-mentioned
Take advantage of certain safety coefficient on the basis of calculating, specifically refer to relevant universal design data or the standards such as mechanical design handbook.
Claims (8)
1. there is an automobile-used brake-by-wire device for flexible redundant unit, comprising:
One braking importation, it includes that one is applied in pedal sense simulator and the electronic pedal of sensor, braking input
On this electronic pedal；
One brake output section is divided, and it includes the brake with actuator, drive mechanism, clearance adjustment mechanism and sensor, system
Dynamic device is connected with wheel holding work respectively, braking input the braking moment determined is applied on wheel by direct or indirect；
One control for brake part, it includes a control unit and a failure diagnosis unit, and control unit is passed through with failure diagnosis unit
Vehicle bus communicates, according to the braking operation pattern that the status command control realization received is different；
Characterized by further comprising:
One Flexible Transmission part, it includes executing the two-way controllable clutch mechanism of driving wheel, an intermediate transmission mechanism and two, executes driving wheel
Centre bore is affixed with electronic pedal rotating shaft, executes the driving wheel intermediate transmission wheel with intermediate transmission mechanism directly or indirectly through flexible member
Connect；The left and right drive of intermediate transmission mechanism respectively and two two-way controllable clutch mechanisms outer clutch driving wheel directly or
Connected flexible member to connect；Two-way controllable clutch mechanism is installed between a pair rotary drive pair of brake drive mechanism, its from
Closing turning wheel affixed with driving pair element, in its clutch, star-wheel is affixed with driven secondary element.
The automobile-used brake-by-wire device with flexible redundant unit the most according to claim 1, it is characterised in that: in described
Between the left and right drive of drive mechanism, intermediate transmission wheel be arranged on jackshaft by bearing, left and right drive respectively with in
Between drive interference fits, and by bonded, three is coaxial.
The automobile-used brake-by-wire device with flexible redundant unit the most according to claim 1, it is characterised in that: described is double
Some wedge shape spaces pair uniform to circumference are formed with inside drive outside clutch outside star-wheel in the clutch of controllable clutch mechanism,
Two wedge shape narrow spaces of each wedge shape space centering are relative, and a pair roller of interior installation, roller makes itself and clutch through spring pre-tightening
Outer drive inward facing surface contacts with work surface outside star-wheel in clutch, and every pair of roller is separated by the shift fork of clutch turning wheel, from
Close turning wheel and star-wheel matched in clearance in clutch.
4. according to the automobile-used brake-by-wire device with flexible redundant unit described in claim 1,2, it is characterised in that: described
Being cased with respectively on the wire digging line of the left and right drive of intermediate transmission mechanism adjusting spring, housing is fixed in the one end adjusting spring,
The other end compresses and adjusts screwed pipe, adjusts screwed pipe one end and shell bores matched in clearance, and the other end has external screw thread, with adjustment spiral shell
Female, locking nut coordinates, and withstands wire digging line sleeve cap by adjusting nut.
5. according to the automobile-used brake-by-wire device with flexible redundant unit described in claim 1,3, it is characterised in that: described
The clutch turning wheel shift fork of two-way controllable clutch mechanism is adjacent roller in a free state and has certain unidirectional gap, and roller exists
The frictional force produced during wedging in wedge shape space, more than directly or indirectly dragging the suffered resistance of power-off actuator idle running, less than start
Device directly acts on or the stalling torque of indirect transfer.
6. according to the automobile-used brake-by-wire device with flexible redundant unit described in claim 1,2,3, it is characterised in that: institute
Its angular travel of the electronic pedal stated is through executing the clutch outer drive transmission of driving wheel, intermediate transmission mechanism, two-way controllable clutch mechanism
After value, drive the outer drive of clutch of two-way controllable clutch mechanism that brake gap is completely eliminated more than actuator and turned over
Angle value.
7. according to the automobile-used brake-by-wire device with flexible redundant unit described in claim 1,2,3, it is characterised in that: institute
The two-way controllable clutch mechanism stated is installed in non-steering wheels brake, and the vehicle for four-wheel steering is then installed on rear wheel brake
In.
8. according to the automobile-used brake-by-wire device with flexible redundant unit described in claim 1,2,3, it is characterised in that: institute
The control system stated is provided with braking switching switch, connects power supply and actuator, and this switch is placed in steering wheel or steering column or master control borad
On, instrumental panel is provided with the display lamp of correspondence.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610224450.8A CN105835857B (en) | 2016-04-12 | 2016-04-12 | Automobile-used brake-by-wire device with flexible redundant unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610224450.8A CN105835857B (en) | 2016-04-12 | 2016-04-12 | Automobile-used brake-by-wire device with flexible redundant unit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105835857A true CN105835857A (en) | 2016-08-10 |
| CN105835857B CN105835857B (en) | 2018-06-29 |
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| CN201610224450.8A Expired - Fee Related CN105835857B (en) | 2016-04-12 | 2016-04-12 | Automobile-used brake-by-wire device with flexible redundant unit |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109677388A (en) * | 2019-02-03 | 2019-04-26 | 上海蔚来汽车有限公司 | Electronic parking system, the vehicle including the electronic parking system and control method |
| CN111605532A (en) * | 2020-06-01 | 2020-09-01 | 长沙理工大学 | Connecting rod type power-assisted brake assembly |
| CN112105533A (en) * | 2018-05-09 | 2020-12-18 | 爱皮加特股份公司 | Brake system, in particular for autonomous driving |
| TWI735093B (en) * | 2019-10-04 | 2021-08-01 | 財團法人工業技術研究院 | Vehicle electronic brake system and brake linkage device thereof |
| CN114954393A (en) * | 2022-03-28 | 2022-08-30 | 柳州五菱新能源汽车有限公司 | Vehicle control method and related device |
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| CN205573930U (en) * | 2016-04-12 | 2016-09-14 | 吉林大学 | Automobile -used drive -by -wire arresting gear with flexible redundant mechanism |
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| CN1441738A (en) * | 2000-04-11 | 2003-09-10 | Skf工程研究中心公司 | Vehicle control with manual back up |
| CN101746365A (en) * | 2008-12-11 | 2010-06-23 | 现代摩比斯株式会社 | Safety braking device of vehicle |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112105533A (en) * | 2018-05-09 | 2020-12-18 | 爱皮加特股份公司 | Brake system, in particular for autonomous driving |
| CN109677388A (en) * | 2019-02-03 | 2019-04-26 | 上海蔚来汽车有限公司 | Electronic parking system, the vehicle including the electronic parking system and control method |
| CN109677388B (en) * | 2019-02-03 | 2024-02-27 | 上海蔚来汽车有限公司 | Electronic parking system, vehicle comprising same and control method |
| TWI735093B (en) * | 2019-10-04 | 2021-08-01 | 財團法人工業技術研究院 | Vehicle electronic brake system and brake linkage device thereof |
| CN111605532A (en) * | 2020-06-01 | 2020-09-01 | 长沙理工大学 | Connecting rod type power-assisted brake assembly |
| CN111605532B (en) * | 2020-06-01 | 2021-07-27 | 长沙理工大学 | Connecting rod type power-assisted brake assembly |
| CN114954393A (en) * | 2022-03-28 | 2022-08-30 | 柳州五菱新能源汽车有限公司 | Vehicle control method and related device |
| CN114954393B (en) * | 2022-03-28 | 2023-08-04 | 柳州五菱新能源汽车有限公司 | Vehicle control method and related device |
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| CN105835857B (en) | 2018-06-29 |
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