CN105197002B - Vehicle braking booster and its control method - Google Patents
Vehicle braking booster and its control method Download PDFInfo
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- CN105197002B CN105197002B CN201410285101.8A CN201410285101A CN105197002B CN 105197002 B CN105197002 B CN 105197002B CN 201410285101 A CN201410285101 A CN 201410285101A CN 105197002 B CN105197002 B CN 105197002B
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Abstract
The present invention relates to a kind of vehicle braking booster and its control methods.The brake booster, including shell, the interior setting of the shell: push rod, one end of the push rod with pedal for connecting；Power-assisted actuation mechanism, the output of the power-assisted actuation mechanism are hollow and allow the push rod by wherein；Master cylinder piston component, the master cylinder piston component receives the auxiliary force that from the pedal and the output of pedal force and the power-assisted actuation mechanism that transmits by the push rod exports, and it is hydraulic to generate master cylinder, wherein the first elastic element is arranged between the master cylinder piston component and the output of the power-assisted actuation mechanism.Due to the compression property of the first elastic element, adjustable pedal power is may be implemented in brake booster of the present invention.Change different compression properties the first elastic element can quickly changing mechanism assist rate.
Description
Technical field
The invention belongs to technical field of automobile parts, a kind of vehicle braking booster and its controlling party are in particulard relate to
Method.
Background technique
As the main component of automobile, braking system is great for the safety traffic effect of automobile.It is widely used at present
Brake fluid system, brake master cylinder piston generate high-pressure brake liquid, driving brake disc and brake caliper friction or brake-shoe with
Brake drum friction, converts kinetic energy into thermal energy, to make vehicle deceleration and stop.In order to guarantee in normal driving process, make
Dynamic system offer is enough hydraulic, needs very high piston thrust, it is impossible to and brake pedal is stepped on by driver completely and is realized, system
Dynamic force aid system is indispensable.Conventional truck majority uses vacuum servo.Vacuum boost system is mainly by shell, diaphragm, vacuum
Valve, air valve and associated component are constituted.Shell is divided into vacuum chamber and air chamber, vacuum chamber and motor intake manifold phase by diaphragm
Logical, air chamber is communicated by air valve with atmosphere.Vacuum valve connects two cavitys.When normally travel, vacuum valve is opened, and air valve closes
It closes, two cavity pressure differences are equal.When braking, vacuum valve is closed, and air valve is opened, and pressure difference is generated in two cavitys, and diaphragm is pushed to drive
Push rod is mobile to the master cylinder piston direction of motion, to realize power-assisted.
However traditional vacuum booster needs to provide vacuum degree with motor intake manifold, therefore is not suitable for electronic vapour
Vehicle；And often huge structure, rigidity are poor for vacuum booster.
To solve the above problems, the Chinese invention patent application of Publication No. 102015397A provides a kind of circulation chou
Structure electromechanical brake boost mechanism, provides a kind of electromechanical brake booster, compact-sized, functionally solves vacuum and helps
Many deficiencies of power device, but the motor power-assisted of the program and pedal push rod thrust are coupled by rubber ring realization, and rubber
Nonlinear characteristic that motor power-assisted is accurately controlled is more difficult；In addition, booster described in 102015397A can only be by adding
It fills additional electrical control actuator and hydraulic channel realizes braking decoupling.
Previous electromechanical booster common problem is often through reaction plate rubber element self structure category
Property determine assist characteristic, and can only realize pedal displacement/power opened loop control, i.e. driver inputs certain pedal displacement, helps
The offer of power device is corresponding electric boosted, is output on master cylinder piston.And the relationship of the pedal force and displacement, pedal force and master cylinder liquid
The relationship of pressure is unadjustable, is a unidirectional control process, and driver pedal power cannot change, Wu Fajin with operating condition difference
The characteristic calibration adjustment of row pedal.
Summary of the invention
The adjustable controllable brake booster of power-assisted may be implemented the technical problem to be solved in the present invention is to provide a kind of.
Brake booster of the present invention includes shell, and setting in the shell: one end of push rod, the push rod is used for
It is connect with pedal；Power-assisted actuation mechanism, the output of the power-assisted actuation mechanism are hollow and allow the push rod by wherein；
Master cylinder piston component, the master cylinder piston component is received from the pedal and the pedal force transmitted by the push rod and described
The auxiliary force of the output output of power-assisted actuation mechanism, and it is hydraulic to generate master cylinder, wherein the master cylinder piston component and institute
It states and the first elastic element is set between power-assisted actuation mechanism output.Due to the compression property of the first elastic element, the present invention is related to
And brake booster pedal sense identical with traditional vacuum booster may be implemented, and realize adjustable pedal power.Change is not
With compression property the first elastic element can quickly changing mechanism assist rate.
Optionally, in above-mentioned brake booster, being equipped between the push rod other end and the master cylinder piston component can
Switching mileage, on the direction that the master cylinder hydraulic pressure increases, it is described can be under state existing for switching mileage, the pedal and institute
Master cylinder hydraulic pressure decoupling is stated, the power-assisted actuation mechanism is exported without auxiliary force.In this section of idle stroke, driver steps on pedal promotion
Through the push rod of power-assisted rack gear, and power-assisted rack gear remains stationary, and does not have thrust on master cylinder piston component, can not build in master cylinder
It stands hydraulic, to realize hydraulic decoupling in driver pedal thrust and braking system, can be used for regeneration brake system, realize certain
Brake energy recovery in deceleration
Optionally, in above-mentioned brake booster, when the push rod is mobile overcome it is described can switching mileage after, it is described to help
Power executing agency exports auxiliary force, and the master cylinder piston component couples the pedal force and the auxiliary force.
Optionally, in above-mentioned brake booster, first elastic element is disk spring.
Optionally, in above-mentioned brake booster, the power-assisted actuation mechanism is fixed in first elastic element one end
Output, and there is the linear character of the power along the direction for increasing or reducing the master cylinder hydraulic pressure.
Optionally, in above-mentioned brake booster, first elastic element have certain decrement, the decrement be
On the direction that the master cylinder hydraulic pressure increases and when the push rod is mobile overcome described in can make the power-assisted after switching mileage
Executing agency's output and the master cylinder piston component are detached from.
Optionally, the second elasticity is set in above-mentioned brake booster, between the master cylinder piston component and the shell
Element, second elastic element, which can be applied to the master cylinder piston component on the direction that the master cylinder hydraulic pressure reduces, makes institute
It states push rod return and first elastic element is made to generate the power of the decrement.It is compressed on a small quantity existing for first elastic element
Amount, the power for making master cylinder hydraulic pressure augment direction is generated to master cylinder piston component, and driver is applied to thrust and dish-shaped bullet on push rod
Spring deformation force overcomes the active force of the second elastic element jointly, can reduce master cylinder piston and other inertance elements open motor
Dynamic load avoids starting current from increasing the impact to motor.
Optionally, in above-mentioned brake booster, the push rod be equipped with ring-shaped step, the power-assisted actuation mechanism it is defeated
Third elastic element is set between part and the ring-shaped step out, and the third elastic element can apply the ring-shaped step
Add the power being pressed against on the shell.Third elastic element and the first elastic element guarantee the pedal of driver in idle stroke
Force feeling.
The invention solves another technical problem be to provide a kind of pedal characteristic curve calibration adjustment of being able to carry out
The control method of brake booster.
The control method of brake booster of the present invention is the following steps are included: the electronic control unit of booster respectively obtains
Pedal-displacement and master cylinder hydraulic pressure pressure；The electronic control unit exports the auxiliary of the power-assisted actuation mechanism according to pedal-displacement
Power, so that generating master cylinder hydraulic pressure pressure；The electronic control unit judges its phase with driver according to the master cylinder hydraulic pressure pressure of output
It hopes output whether variant, and then adjusts output auxiliary force, change the relationship between pedal force and master cylinder hydraulic pressure pressure.
Optionally, in above-mentioned control method, first elastic element has decrement, and the change of the decrement causes
The change of the auxiliary force, and then change the assist rate of booster.
Optionally, in above-mentioned control method, the input component of the power-assisted actuation mechanism is motor, the first elasticity member
The decrement of part angular position output by the motor determines.
By the control method, booster system establishes pedal force/displacement, the pass between pedal force/master cylinder hydraulic pressure pressure
System can carry out closed-loop control to pedal characteristic, it is easy to accomplish the accurate control to motor power-assisted.
Through the following detailed description with reference to the accompanying drawings, other aspects and features of the present invention become obvious.But it should know
Road, which is only the purpose design explained, not as the restriction of the scope of the present invention, this is because it should refer to
Appended claims.It should also be noted that attached drawing is merely intended to conceptually illustrate structure and process described herein, unless in addition
It points out, it is not necessary to scale attached drawing.
Detailed description of the invention
In conjunction with attached drawing refering to the detailed description of following specific embodiments, present invention will become more fully understood, in attached drawing
Same reference numbers refer to same element in view always.Wherein:
Fig. 1-2 is the structural schematic diagram of brake booster of the present invention；
Fig. 3 is the force analysis figure of the connecting element of brake booster of the present invention；And
Fig. 4 is the loop control theory figure of brake booster of the present invention.
Specific embodiment
To help those skilled in the art that can definitely understand claimed theme, with reference to the accompanying drawing
It describes the specific embodiments of the present invention in detail.
It is the structural schematic diagram of vehicle braking booster of the present invention referring to Fig. 1-2.The vehicle braking booster
For electric-controlled mechanical booster, motor 1, shaft coupling 2, deceleration mechanism 3, jackshaft 4, power-assisted including constituting power-assisted actuation mechanism
Unit 5 and other component or mechanism or unit.Wherein shaft coupling 2, deceleration mechanism 3, jackshaft 4 and the setting of power-assisted subelement 5 exist
In one shell 7, specifically deceleration mechanism 3 is worm screw 31 and worm gear 32, and worm screw 31 is mounted in shell 7 by bearing.Power-assisted is held
Row mechanism includes the power-assisted gear 51 and power-assisted rack gear 52 of engagement, and power-assisted gear 51 and worm gear 32 above-mentioned are separately mounted to centre
The both ends of axis 4, jackshaft 4 is mounted in shell 7 by bearing, and power-assisted rack gear 52 is mounted in shell 7 also by bearing.Electricity
Machine 1 is permanent magnet synchronous motor, and output shaft is connected by shaft coupling 2 with worm screw 31, the speed reducer of worm screw 31 and the composition of worm gear 32
The power that structure 3 exports motor 1 carries out deceleration torque increase, then passes through jackshaft 4, power-assisted gear 51, is eventually transferred to as whole
On the power-assisted rack gear 52 of the output of a power-assisted actuation mechanism, that is, export auxiliary force.
Power-assisted rack gear 52 be it is hollow, what is extended there through is push rod 62, and push rod 62 can be moved back relative to power-assisted rack gear 52
It is dynamic.One end of push rod 62 is connected to pedal 61, and the other end connects master cylinder piston component.Master cylinder piston component includes being fixed to each other
Connecting element 54 and master cylinder piston 9 together, connecting element 54 are arranged in shell 7.The mobile of master cylinder piston 9 can cause master cylinder
Interior hydraulic increases or decreases.
First elastic element 53 is set between power-assisted rack gear 52 and connecting element 54, which is preferably
Disk spring.Connecting element 54 is rigid.Disk spring covers on push rod 62, and one end is fixed on power-assisted rack gear 52, another
End is kept in contact with connecting element 54.In the initial state, disk spring need to keep certain decrement, and the decrement is by setting
It is fixed, specifically it will be described herein-after.
Second elastic element 8 is set between connecting element 54 and shell 7, which is return spring, is born
Push rod 62 is pushed return by connecting element 54 after pedal 61 discharges by duty.
One section of adjustable idle stroke is additionally provided between the push rod 62 and master cylinder piston component.When push rod 62 is in master cylinder
When being moved on the direction of hydraulic increase, due to master cylinder piston component touch, not generating in master cylinder new as caused by pedal force
It is hydraulic.Specifically, connecting element 54 is hollow or central apertured, and the part that push rod 62 stretches out power-assisted rack gear 52 enters connecting element
In 54 hole, and certain gap is reserved in hole, when guaranteeing 62 initial motion of push rod, will not connect at once with master cylinder piston 9
Touching.
Auxiliary force is transmitted on master cylinder piston 9 by power-assisted rack gear 52, the first elastic element 53, connecting element 54, pedal
Power is transmitted on master cylinder piston 9 by pedal 61, push rod 62.Master cylinder piston 9 closes above-mentioned two couple of force, makes to generate in master cylinder hydraulic
And obtain certain deceleration.
To make driver keep good pedal force feeling, one end of the close pedal 61 of push rod 62 is equipped with ring-shaped step
65, setting covers the third elastic element 63 on push rod 62, third elasticity member between power-assisted rack gear 52 and ring-shaped step 65
Part 63 can be general compressed spring.Under original state, which has certain decrement.Pedal 61 is logical
Cross U-shaped be hinged and connected on push rod 62.When driver steps on pedal 61, push rod 62 can be mobile to direction as shown, due to third
The effect of elastic element 63, compressing force are fed back through push rod 62 onto brake pedal 61, and driver is made to have pedal force feeling.
When braking is not carried out in vehicle, booster is in initial position.The initial position of power-assisted rack gear 52 passes through motor 1
It is controlled.The side of third elastic element 63 is withstood on rack gear, and the other side is contacted with ring-shaped step 65.It, should when initial position
Third elastic element 63 compresses slightly, and ring-shaped step 65 is pressed on outer housing 7.The first elastic element 53 is in connection at this time
A small amount of compressive state is between element 54 and power-assisted rack gear 52, connecting element 54 is pressed in the backing pin of shell 7 by the second elastic element 8
On (not shown).Master cylinder piston 9 is in initial position, and master cylinder and pipeline are interior without hydraulic.
When needing to brake, driver steps on pedal 61, is moved by push rod 62 to 9 direction of master cylinder piston (direction as shown)
It is dynamic.Power-assisted rack gear 52 is remain stationary at this time, maintains initial position.Push rod 62 moves forward, the power of third elastic element 63 via
In the feedback to pedal 61 of push rod 62, guarantee driver pedal force feeling.Since push rod 62 is certain adjustable with the presence of connecting element 54
Idle stroke, push rod 62 need to overcome this section of idle stroke could be by thrust in connecting element 54.In this section of stroke, braking
It is decoupled in master cylinder without hydraulic variation, brake pedal 61 and master cylinder piston 9, can be used for regenerative braking.Idle stroke is adjustable, can
Brake energy recovery for different deceleration.
After overcoming idle stroke, driver steps on pedal 61.Push rod 62 is contacted with connecting element 54 at this time, in order to avoid making an uproar
Sound, flexible washer (not shown) in connecting element 54.
When brake pushrod 62 overcomes idle stroke and connecting element 54 contacts, motor assist power starts to intervene.Direct current generator 1
Work, the torque of output pass through the amplification of worm gear 32, worm screw 31, are transmitted on power-assisted gear 51, push power-assisted rack gear 52 to master
The direction of the hydraulic increase of cylinder is mobile, power-assisted rack gear 52 and the first elastic element 53(disk spring) it connect, the first elastic element 53
Stress continues to compress, and auxiliary force is transmitted in connecting element 54.Connecting element 54 couple push rod 62 transmit pedal force with
The auxiliary force of motor 1 pushes master cylinder piston 9 to generate the brake fluid pressure for looking for the direction of master cylinder hydraulic pressure increase.
Original state, disk spring keep a small amount of precommpression, guarantee that system structure is compact.
In idle stroke, since connecting element 54 and power-assisted rack gear 52 remain stationary state, the first elastic element 53 dimension
Hold original state.When driver implements braking maneuver, push rod 62 overcomes idle stroke to contact with connecting element 54, continues to step at this time
Brake pedal 61, the power for reducing direction to master cylinder hydraulic pressure that push rod 62 pushes connecting element 54 that return spring 8 is overcome to apply (connect
Connect the decrement that stroke that element 54 follows push rod 62 to move forward is greater than the first elastic element 53), disk spring at this time
Slight clearance is generated with connecting element 54, is no longer existed between power-assisted rack gear 52 and connecting element 54, master cylinder piston 9 and push rod 62
Rigidity or elastic connection relationship.Motor 1 loads the inertia loads such as master cylinder because not having due to loads reduction, and the starting of motor 1 at this time can have
Effect avoids the increase of transient current, protects motor 1.
In braking process, booster of the present invention can carry out closed-loop control to pedal characteristic, and the pedal is special
Property include relationship between the relationship and pedal force and master cylinder hydraulic pressure pressure of pedal force and pedal displacement, it is defeated by input-
Out-feedback-modified control process can reach the characteristic calibration of ideal pedal and exploitation.
On push rod 62 be arranged first sensor 64 to measure pedal displacement, near master cylinder be arranged second sensor 10 with
It measures hydraulic in master cylinder.The electronic control unit of booster obtains the displacement that driver steps on the generation of pedal 61 by first sensor 64
Size, electric machine controller 11 export the motor power-assisted of needs according to the corner that the displacement controls motor 1, and compress the in turn
One elastic element 53, connecting element 54 are coupled with the auxiliary force and pedal force that the transmitting of the first elastic element 53 comes, and push master cylinder living
Plug 9 generates certain master cylinder hydraulic pressure pressure, and corresponds to the corresponding vehicle deceleration of master cylinder hydraulic pressure pressure.The master at the moment
Hydraulic pressure can be collected by second sensor 10 in cylinder.Operation and processing are carried out to the signal of the above sensor collection
To establish driver pedal power/displacement, pedal force/master cylinder hydraulic pressure pressure relationship.Referring to fig. 2, driver pedal power can by with
Lower formula is calculated:
Finput= PMC/AMC -Fspring
Wherein, PMC is master cylinder hydraulic pressure, and AMC is main cylinder area.Judged in master cylinder hydraulic pressure by electronic control unit and driven
Whether the desired ideal output of the person of sailing is variant, if there is discrepancy, then exporting control signal, adjustment to electric machine controller 11
Motor power-assisted.
On the one hand, on the other hand the size that the displacement of driver's input can control hydraulic pressure in master cylinder passes through reading
Master cylinder hydraulic pressure pressure signal can control the size of motor power-assisted, and the torsion of different motors 1 is exported by electric machine controller 11
Square is enlarged or reduced motor power-assisted, realizes the adjustment that pedal force is inputted for driver.In this way, system can be completed for stepping on
The closed-loop control of plate power and master cylinder pressure.
The relationship of adjustment driver pedal power and pedal displacement is realized by changing the decrement of the first elastic element 53,
Force analysis as shown in Figure 3 at connecting element 54
According to above-mentioned formula, (i.e. pedal force Finput is constant) is displaced for certain driver pedal, as long as changing the
The decrement of one elastic element 53, the auxiliary force acted in connecting element 54 can increase with it or reduce, i.e. Fspring increases
Big or reduction；For certain master cylinder hydraulic pressure pressure (i.e. PMC/AMC is constant), increasing Fspring can realize that Finput reduces,
Similarly Fspring, which reduces, can be achieved Finput increase.The decrement of first elastic element 53 is determined by the angular position that motor 1 exports
It is fixed, higher control precision can be reached.Simultaneously as the first elastic element 53 is kept in contact with connecting element 54, the first bullet
Property element 53 and the architectural characteristic of connecting element 54 keep the corresponding relationship of motor power-assisted and driver pedal stroke variable, realize
Driver can be changed pedal force feeling.
By adjusting control parameter, booster of the present invention carries out the characteristic mark of ideal pedal in which can be convenient
Fixed and development, is shown in Fig. 4, specific implementation is described below:
1. inputting initial force (Cut-in): calibration motor power-assisted intervenes moment t；
2. initial hydraulic exports jump value (Jump-in): the push rod 62 of pedal eliminates the first elastic element of idle stroke moment
53 decrement Δ s；
3. assist rate (Booster ratio): the angular position of control motor 1 adjusts the compression of the first elastic element 53
Value adjusts Fspring, the adjustment of assist rate can be realized, be a closed loop control process；Wherein assist rate, that is, master cylinder power output
FoutputWith booster input power FinputRatio, Foutput=PMC/AMC, Finput=Foutput-Fspring；
4. booster Max point of booster force (Run-out): the corner of motor 1 and the corresponding relationship of pedal travel determine run-
The master cylinder output pressure of the input power at out moment, run-out moment is determined by the maximum rigidity of the first elastic element 53；
By the adjustment to the above key parameter, closed-loop control system is established, carries out brake pedal feel calibration adjustment, it can
It with the effectively save development time, realizes that good client feels, optimizes the dynamic performance of force aid system for braking, reduce braking response
Time shortens braking distance.
When driver completes braking maneuver, release brake pedal 61, master cylinder piston 9 reduces direction to master cylinder hydraulic pressure and moves,
Second elastic element 8 pushes boosting mechanism to be repositioned to backing pin, and the first elastic element 53 pushes power-assisted rack gear 52 to return to initial position,
Pedal force third elastic element 63 pushes back brake pedal 61 simultaneously, and the ring-shaped step 65 of push rod 62 leans against the contact surface of outer housing 7
On.
In conclusion electric-controlled mechanical booster of the present invention is braked not against engine vacuum, Ke Yiyong
In new energy vehicles such as electronic and mixed dynamic power；Whole system is compact-sized, saves arrangement space in enging cabin；It is able to achieve system
Dynamic decoupling, can be used for regenerative braking；Force aid system can establish driver pedal power/displacement and master cylinder hydraulic pressure/vehicle deceleration
Relationship realizes the closed-loop control to force aid system, and can carry out the characteristic calibration exploitation of ideal pedal；First elastic element
53 i.e. disk spring can effectively avoid the increase of 1 starting current of motor caused by the load excessive of motor 1, realize opening to motor 1
Streaming current protection；Decrement by controlling the first elastic element 53 can guarantee pedal sense identical with traditional vacuum booster
Feel, and can quickly change assist characteristic by changing the first elastic element 53 of different compression properties.
The above specific embodiment is merely to illustrate the present invention, and not limitation of the present invention, related technical field
Those of ordinary skill can also make a variety of changes and modification without departing from the scope of the invention, therefore all etc.
Same technical solution also belongs to scope of the invention, and scope of patent protection of the invention should be defined by the claims.
Claims (9)
1. vehicle braking booster is arranged in the shell (7) it is characterized in that including shell (7):
Push rod (62), one end of the push rod (62) with pedal (61) for connecting；
Power-assisted actuation mechanism, the output of the power-assisted actuation mechanism are hollow and allow the push rod (62) by wherein；
The first elasticity member is arranged in master cylinder piston component between the master cylinder piston component and the output of the power-assisted actuation mechanism
Part (53), first elastic element are set on the push rod (62), push rod (62) other end and the master cylinder piston
Be equipped between component can switching mileage, the master cylinder piston component and described can be stepped under state existing for switching mileage described
Plate (61) decoupling, and the power-assisted actuation mechanism is exported without auxiliary force；When the push rod (62) are mobile overcome it is described adjustable
After idle stroke, the power-assisted actuation mechanism exports auxiliary force, and the master cylinder piston component receives from the pedal (61) and leads to
The pedal force of the push rod (62) transmitting and the output of the power-assisted actuation mechanism are crossed via first elastic element (53)
The auxiliary force of output, so that it is hydraulic to generate master cylinder.
2. vehicle braking booster according to claim 1, it is characterized in that: first elastic element (53) is dish-shaped bullet
Spring.
3. vehicle braking booster according to claim 1, it is characterized in that: first elastic element (53) one end is fixed
In the output of the power-assisted actuation mechanism, and with the linear of the power along the direction for increasing or reducing the master cylinder hydraulic pressure
Feature.
4. vehicle braking booster according to claim 1, it is characterized in that: first elastic element (53) has centainly
Decrement, the decrement be on the direction that the master cylinder hydraulic pressure increases and when the push rod (62) are mobile overcome described in
After switching mileage the output of the power-assisted actuation mechanism and the master cylinder piston component can be detached from.
5. vehicle braking booster according to claim 4, it is characterized in that: the master cylinder piston component and the shell
(7) it is arranged between the second elastic element (8), second elastic element (8) can be applied to the master cylinder piston component described
Make the push rod (62) return on the direction that master cylinder hydraulic pressure reduces and first elastic element (53) is made to generate the pressure
The power of contracting amount.
6. vehicle braking booster according to claim 1, it is characterized in that: the push rod (62) is equipped with ring-shaped step
(65), third elastic element (63) are set between the output of the power-assisted actuation mechanism and the ring-shaped step (65), and
The third elastic element (63) can apply the power being pressed against on the shell (7) to the ring-shaped step (65).
7. the control method of vehicle braking booster according to claim 1-6, it is characterized in that: booster
Electronic control unit respectively obtains pedal-displacement and master cylinder hydraulic pressure pressure；The electronic control unit according to pedal-displacement export described in help
The auxiliary force of power executing agency, so that generating master cylinder hydraulic pressure pressure；The electronic control unit is sentenced according to the master cylinder hydraulic pressure pressure of output
Breaking, whether it is variant with the desired output of driver, and then adjusts output auxiliary force, changes pedal force and master cylinder hydraulic pressure pressure
Between relationship.
8. control method according to claim 7 changes it is characterized in that: first elastic element (53) has decrement
Become the change that the decrement causes the auxiliary force, and then changes the assist rate of booster.
9. control method according to claim 8, it is characterized in that: the input component of the power-assisted actuation mechanism is motor (1),
The decrement of first elastic element (53) is determined by the angular position that motor (1) exports.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410285101.8A CN105197002B (en) | 2014-06-24 | 2014-06-24 | Vehicle braking booster and its control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410285101.8A CN105197002B (en) | 2014-06-24 | 2014-06-24 | Vehicle braking booster and its control method |
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| Publication Number | Publication Date |
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| CN105197002A CN105197002A (en) | 2015-12-30 |
| CN105197002B true CN105197002B (en) | 2018-12-07 |
Family
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410285101.8A Active CN105197002B (en) | 2014-06-24 | 2014-06-24 | Vehicle braking booster and its control method |
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| CN106274870A (en) * | 2016-08-16 | 2017-01-04 | 北京英创汇智科技有限公司 | A kind of electromechanical brake booster system |
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| CN105197002A (en) | 2015-12-30 |
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