CN110228456A - A kind of integral type pedal sense simulator with fail safe function - Google Patents
A kind of integral type pedal sense simulator with fail safe function Download PDFInfo
- Publication number
- CN110228456A CN110228456A CN201910581457.9A CN201910581457A CN110228456A CN 110228456 A CN110228456 A CN 110228456A CN 201910581457 A CN201910581457 A CN 201910581457A CN 110228456 A CN110228456 A CN 110228456A
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- Prior art keywords
- piston
- pedal sense
- master cylinder
- sense simulator
- integral type
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- 239000007788 liquid Substances 0.000 claims description 44
- 239000012530 fluid Substances 0.000 claims description 34
- 238000007789 sealing Methods 0.000 claims description 25
- 238000001802 infusion Methods 0.000 claims description 17
- 238000002955 isolation Methods 0.000 claims description 13
- 238000009434 installation Methods 0.000 claims description 6
- 230000033001 locomotion Effects 0.000 claims description 4
- 238000004088 simulation Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 3
- 239000003921 oil Substances 0.000 description 36
- 239000010720 hydraulic oil Substances 0.000 description 8
- 230000005540 biological transmission Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 5
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000010354 integration Effects 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 239000010729 system oil Substances 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
- B60T13/10—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release
- B60T13/66—Electrical control in fluid-pressure brake systems
- B60T13/68—Electrical control in fluid-pressure brake systems by electrically-controlled valves
- B60T13/686—Electrical control in fluid-pressure brake systems by electrically-controlled valves in hydraulic systems or parts thereof
-
- 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
- B60T7/00—Brake-action initiating means
- B60T7/02—Brake-action initiating means for personal initiation
- B60T7/04—Brake-action initiating means for personal initiation foot actuated
- B60T7/042—Brake-action initiating means for personal initiation foot actuated by electrical means, e.g. using travel or force sensors
-
- 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
- B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
- B60T8/32—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration
- B60T8/34—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration having a fluid pressure regulator responsive to a speed condition
- B60T8/40—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration having a fluid pressure regulator responsive to a speed condition comprising an additional fluid circuit including fluid pressurising means for modifying the pressure of the braking fluid, e.g. including wheel driven pumps for detecting a speed condition, or pumps which are controlled by means independent of the braking system
- B60T8/4072—Systems in which a driver input signal is used as a control signal for the additional fluid circuit which is normally used for braking
- B60T8/4081—Systems with stroke simulating devices for driver input
- B60T8/409—Systems with stroke simulating devices for driver input characterised by details of the stroke simulating device
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- Engineering & Computer Science (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Braking Elements And Transmission Devices (AREA)
- Transmission Of Braking Force In Braking Systems (AREA)
- Regulating Braking Force (AREA)
Abstract
The present invention relates to a kind of integral type pedal sense simulator with fail safe function, including brake pedal, push rod, decouple sleeve, normally closed solenoid valve, normally open solenoid valve, before, rear end cap, integral type cylinder body, play the pedal sense simulator piston and spring of pedal sense dummy activity, and play the brake master cylinder piston of fail safe and return action and spring is two, the decoupling sleeve forms master cylinder drive cavity between master cylinder first piston bar portion, pedal sense simulator drive cylinder is formd between the decoupling sleeve and pedal sense simulator first piston, the opening and closing combination of the solenoid valve makes pedal sense simulator drive cylinder, master cylinder drive cylinder works under different working conditions, realize fail safe function.The present invention can not only guarantee that driver has good pedal sense, and can guarantee when brake-by-wire failure can taking human as providing brake force, meanwhile, it is simple and compact for structure, convenient for integrated.
Description
Technical field
The present invention relates to a kind of pedal sense simulator being mounted in electronic hydraulic brake system, in particular to a kind of tool
There is the integral type pedal sense simulator of fail safe function.
Background technique
With the development of new-energy automobile, the requirement to automobile braking safety, comfort is higher and higher, with electro-hydraulic
It brakes and is gradually developed and applies for the brake-by-wire technology of principal mode with electric mechanical braking.On-line Control moves state
Under, displacement signal is passed to ECU by driver's brake pedal, pedal displacement sensor, and ECU judges the braking of driver
It is intended to and issues control signal, control brake force source generates brake force.Since under brake-by-wire state, brake pedal is held with braking
Decoupled state is between row mechanism, driver cannot get true pedal sense, and it is true to simulate to need pedal sense simulator
Real pedal sense, in order to avoid driver's maloperation.
The dominant form of current brake-by-wire technology is the electro-hydraulic brake for relying on traditional brake fluid system
System, under normal operation, brake pedal and braking execute and are in decoupled state between structure.When line control brake system fails
When, how to guarantee artificial intervention braking system, brake force is provided, even if the state that braking system is in non-decoupling is to guarantee line
Control one of dynamic reliable strategy of technical security.Current primary solutions are, when On-line Control moves thrashing, partition system
The pipeline of hydrodynamic and pedal sense simulator opens the pipeline between master cylinder and brake actuator, becomes tradition
Hydraulic braking mode, effective safety that ensure that brake-by-wire technology.But master cylinder instantly and pedal sense mould
Quasi- device is all independent from each other, and the line control brake system of additional pedal sense simulator needs more installation spaces.
A kind of adjustable automobiles brake pedal described in patent CN207257652U (being published on April 20th, 2018)
The simulator of feeling, master cylinder are to separate with pedal sense simulator, pass through a two-position five-way electromagnetism between them
Valve is connected；A kind of line traffic control electro-hydraulic brake system is described in patent CN207875612U (be published in 2018 on September 18),
What master cylinder and pedal sense simulator were chained up also with solenoid valve.This set is due to attached pedal sense mould
Quasi- device, needs bigger arrangement space, integration is poor.
In order to guarantee that the novel braking system for being attached with pedal sense simulator is compact-sized, integration is good, is conducive to installation
Arrangement, the integral type pedal sense simulator for designing a kind of achievable fail safe function for being integrated with master cylinder is effectively to lift
One of arrange.
Summary of the invention
In view of the above technical problems, the purpose of the invention is to novel braking system more compact structure, integration is more preferable,
Solve the problem of the braking ability in the case that automotive front end space layout is nervous and guarantee brake-by-wire fails.
The purpose of the present invention is realized at least through one of following technical solution:
A kind of integral type pedal sense simulator with fail safe function, comprising:
Integral type cylinder body, the front and back of the integral type cylinder body passes through gasket respectively and bolt be fixedly installed rear end cap and
Drive end bearing bracket is provided with the isolation board that inner cavity is divided into front chamber and rear chamber in the integral type cylinder body,
The pedal sense simulator second piston being slidably matched, pedal sense simulator are disposed in the front chamber
First piston, decoupling sleeve, between the isolation board and pedal sense simulator second piston, pedal sense simulator second it is living
It is respectively arranged with pedal sense simulator second spring between plug and pedal sense simulator first piston and pedal sense is simulated
The first spring of device, the decoupling sleeve are in convex shape, and its rear end is provided with central blind hole, the setting of front end periphery wall along axially centered
There is the liquid inlet/outlet for being connected to the central blind hole and sealed with the centre bore of the drive end bearing bracket and is cooperated, the pedal sense simulator
Liquid inlet/outlet is provided on casing wall between first piston and decoupling sleeve；
The master cylinder second piston being slidably matched and master cylinder first piston, institute are disposed in the rear chamber
It states between master cylinder second piston and rear end cap, distinguish between the master cylinder second piston and master cylinder first piston
It is provided with the first spring of master cylinder second spring and master cylinder, the bar portion movable sealing of the master cylinder first piston
Successively covered with the isolation board, pedal sense simulator second piston, the centre bore of pedal sense simulator first piston, decoupling
The central blind hole of cylinder is slidably matched；It is staggered one on casing wall between the rear end cap and master cylinder second piston along the axial cylinder
Spacing is liftoff to be provided with the second fluid infusion hole and the first fluid hole, the master cylinder second piston and master cylinder first piston it
Between casing wall on be provided with the first fluid infusion hole and the second fluid hole with being staggered certain distance along the axial cylinder；
Brake pedal and push rod, one end of the push rod are articulated with brake pedal, the other end and decoupling barrel forward end phase
Hingedly, push rod linear motion is limited by car body guiding mechanism, brake pedal thrust is reached into decoupling sleeve.
Oil storage cup, the oil storage cup pass through each fluid infusion hole of piping connection, by normally closed solenoid valve and piping connection solution respectively
First liquid inlet/outlet of coupling sleeve connects second liquid inlet/outlet by normally open solenoid valve and management.
Preferably, being arranged in ante-chamber chamber interior walls between the isolation board and pedal sense simulator second piston limited
Position block.Limited block can be by changing spring assembly rigidity, to make pedal feedback to the reaction force of foot and true feeling
It is more consistent.
Preferably, being provided with the second sealing on the periphery wall that the decoupling sleeve and the ante-chamber chamber interior walls are slidably matched
Circle, the pedal sense simulator drive cavity for preventing from being located between decoupling sleeve and the pedal sense simulator first piston
Oil liquid leak to outside cylinder body.
Preferably, the periphery that the master cylinder first piston and the decoupling bushing core blind hole inner wall are slidably matched
The first sealing ring is provided on wall, for preventing the pedal sense simulator drive cavity and the decoupling bushing core blind hole same
Oil liquid between master cylinder drive cavity made of the bar portion of the master cylinder first piston is surrounded interpenetrates.
Preferably, the pedal sense simulator first piston and the ante-chamber chamber interior walls be slidably matched periphery wall,
The pedal sense simulator first piston and the bar portion cooperation centre bore inside on be respectively arranged with the 4th sealing ring and
Third sealing ring.For preventing the oil liquid of the pedal sense simulator drive cavity from leaking to positioned at pedal sense simulator second
Pedal sense simulator chamber between piston and pedal sense simulator first piston.
Preferably, being provided on the periphery wall that the master cylinder first piston is slidably matched with the back cavity chamber interior walls
5th sealing ring guarantees the leakproofness between the master cylinder first piston and inboard wall of cylinder block.
Preferably, first liquid inlet/outlet is located at the bottom of the central blind hole, it is ensured that the input of hydraulic oil is discharged
Smoothly.
Preferably, closely the pedal sense simulator first piston direction decouples sleeve to second liquid inlet/outlet
Side setting.Ensure hydraulic oil smoothly and injects and be discharged the pedal sense simulator drive cavity always.
Preferably, one end setting of first fluid hole closely integral type cylinder body installation rear end cap, described the
Closely the master cylinder second piston is arranged towards the side of rear end cap in two fluid infusion holes；The second fluid hole closely system
Dynamic master cylinder second piston is arranged towards the side of the master cylinder first piston, and closely the braking is led in first fluid infusion hole
Cylinder first piston is arranged towards the side of the master cylinder second piston.Ensure to manually provide hydraulic oil during brake force
Flow direction is correct, and hydraulic oil smoothly flows into brake apparatus.
Preferably, there are the installation hole locations for hinged car body on the brake pedal.
Compared with prior art, the beneficial effect comprise that
Integral type pedal sense simulator of the invention has the function of fail safe, can not only guarantee line traffic control emotionally
Under condition, driver has good pedal sense, and can guarantee guarantee taking human as brake force is provided when brake-by-wire failure
The safety of braking, meanwhile, it is simple and compact for structure, convenient for integrated.
Detailed description of the invention
Fig. 1 is the schematic diagram under the dynamic working condition of On-line Control of the embodiment of the present invention；
Fig. 2 is that On-line Control of the embodiment of the present invention moves working condition underdrive schematic diagram；
Fig. 3 is the schematic diagram under the dynamic failure conditions of On-line Control of the embodiment of the present invention；
Fig. 4 is the transmission schematic diagram under the dynamic failure conditions of On-line Control of the embodiment of the present invention；
Fig. 5 is the appearance isometric drawing of the embodiment of the present invention；
Fig. 6 is the structure sectional view of the integral type cylinder body of the embodiment of the present invention；
Fig. 7 is the structure sectional view for the decoupling sleeve that the present invention applies example；
Fig. 8 is the isometric drawing for the pedal sense simulator second piston that the present invention applies example；
Fig. 9 is the stroke-pedal force characteristic curve for the pedal sense simulator that the present invention applies example；
In figure: 1. brake pedals, 2. push rods, 3. decoupling sleeves, 4. oil liquid pipelines, 5. normally closed solenoid valves, 6. normally opened electromagnetism
Valve, 7. oil storage cups, 8. integral type cylinder bodies, 9. gaskets, 10. master cylinder second springs, 11. rear end caps, 12. master cylinders
Two pistons, 13. master cylinder chambers, 14. first fluid holes, 15. the first springs of master cylinder, 16. second fluid holes, 17 brakings
Master cylinder first piston, 18. isolation boards, 19. pedal sense simulator second springs, 20. limited blocks, 21. pedal sense simulators
Second piston, 22. pedal sense simulator chambers, 23. the first springs of pedal sense simulator, 24. pedal sense simulators
One piston, 25. pedal sense simulator drive cavities, 26. drive end bearing brackets, 27. master cylinder drive cavities, 28. first liquid inlet/outlets,
29. the first sealing ring, 30. second sealing rings, 31. third sealing rings, 32. second liquid inlet/outlets, 33. the 4th sealing rings, 34.
Five sealing rings, 35. first fluid infusion holes, 36. second fluid infusion holes.
Specific embodiment
With reference to the accompanying drawing, the embodiment of the present invention is described in further details.
As shown in Figure 1 and Figure 5, a kind of integral type pedal sense simulator with fail safe function, including integral type
Cylinder body 8, brake pedal 1 and push rod 2, oil storage cup 7,
The front and back of the integral type cylinder body 8 passes through gasket 9 respectively and bolt is fixedly installed rear end cap 11 and drive end bearing bracket
26, as shown in fig. 6, the isolation board 18 that inner cavity is divided into front chamber and rear chamber is provided in the integral type cylinder body 8,
In, rear chamber is known as master cylinder chamber 13, and front chamber is known as pedal sense simulator chamber 22；
The pedal sense simulator second piston 21 being slidably matched, pedal sense simulation are disposed in the front chamber
Device first piston 24, decoupling sleeve 3, between the isolation board 18 and pedal sense simulator second piston 21, pedal sense mould
Pedal sense simulator second spring is respectively arranged between quasi- device second piston 21 and pedal sense simulator first piston 24
19 and the first spring of pedal sense simulator 23, as shown in fig. 7, the decoupling sleeve 3 is in convex shape, its rear end is along axially centered
Be provided with central blind hole, front end periphery wall be provided with the liquid inlet/outlet 28 for being connected to the central blind hole and in the drive end bearing bracket
The sealing of heart hole cooperates, and is provided with liquid in-out on the casing wall between the pedal sense simulator first piston 24 and decoupling sleeve 3
Hole 32；Sealed chamber between the pedal sense simulator first piston 24 and decoupling sleeve 3 is pedal sense simulator biography
Dynamic chamber 25；
The master cylinder second piston 12 being slidably matched and master cylinder first piston are disposed in the rear chamber
17, between the master cylinder second piston 12 and rear end cap 11, the master cylinder second piston 12 and master cylinder first
Master cylinder second spring 10 and the first spring of master cylinder 15 are respectively arranged between piston 17, the master cylinder first is living
Successively simulated with the isolation board 18, pedal sense simulator second piston 21, pedal sense to the bar portion movable sealing of plug 17
The centre bore of device first piston 24, the central blind hole for decoupling sleeve 3 are slidably matched；The rear end cap 11 and master cylinder second are living
The second fluid infusion hole 36 and the first fluid hole 14 are provided on casing wall between plug 12 with being staggered certain distance along the axial cylinder, it is described
It sets with being staggered certain distance on casing wall between master cylinder second piston 12 and master cylinder first piston 17 along the axial cylinder
It is equipped with the first fluid infusion hole 35 and the second fluid hole 16；Central blind hole and 17 rod end of master cylinder first piston for decoupling sleeve 3 are close
Sealing surrounds master cylinder drive cavity 27；As between the preferred isolation board 1 and pedal sense simulator second piston 21
Limited block 20 is provided in ante-chamber chamber interior walls.
One end of the push rod 2 is articulated with brake pedal 1, and the other end is hinged with decoupling 3 front end of sleeve, passes through car body
Guiding mechanism limits push rod 2 and moves along a straight line, and 1 thrust of brake pedal is reached decoupling sleeve 3.On the brake pedal 1 there are
Installation hole location for hinged car body.
The oil storage cup 7 decouples sleeve by each fluid infusion hole of piping connection, by normally closed solenoid valve 5 and piping connection respectively
3 the first liquid inlet/outlet 28 connects second liquid inlet/outlet 32 by normally open solenoid valve 6 and management.
As preferred embodiment, it is arranged on the periphery wall that the decoupling sleeve 3 is slidably matched with the ante-chamber chamber interior walls
There is the second sealing ring 30, for preventing the oil liquid positioned at the pedal sense simulator drive cavity 25 from leaking to outside cylinder body.
As preferred embodiment, the master cylinder first piston 17 and the 3 central blind hole inner wall of decoupling sleeve are sliding
It is provided with the first sealing ring 29 on the periphery wall of dynamic cooperation, for preventing the pedal sense simulator drive cavity 25 and the system
Oil liquid between dynamic master cylinder drive cavity 27 interpenetrates.
As preferred embodiment, the pedal sense simulator first piston 2 is slidably matched with the ante-chamber chamber interior walls
Periphery wall, be respectively arranged with the on the pedal sense simulator first piston 2 and the centre bore inside of bar portion cooperation
Four sealing rings 33 and third sealing ring 31.Oil liquid for preventing the pedal sense simulator drive cavity 25 leaks to described step on
Plate sense simulator chamber 22.
As preferred embodiment, periphery that the master cylinder first piston 17 is slidably matched with the back cavity chamber interior walls
It is provided with the 5th sealing ring 34 on wall, guarantees the leakproofness between the master cylinder first piston 17 and inboard wall of cylinder block.It is described
First liquid inlet/outlet 28 is located at the bottom of the central blind hole, it is ensured that the input discharge of hydraulic oil is smooth.Second liquid in-out
Closely side setting of the pedal sense simulator first piston 24 towards decoupling sleeve 3 of hole 32.Ensure hydraulic oil smoothly and
Always inject and be discharged the pedal sense simulator drive cavity 25.
As preferred embodiment, closely the integral type cylinder body 8 installs the one of rear end cap 11 to first fluid hole 14
End setting, closely the master cylinder second piston 12 is arranged towards the side of rear end cap 11 in second fluid infusion hole 36；It is described
Closely the master cylinder second piston 12 is arranged second fluid hole 16 towards the side of the master cylinder first piston 17, institute
Stating the first fluid infusion hole 35, closely the master cylinder first piston 17 is arranged towards the side of the master cylinder second piston 12.
The flow direction for ensuring to manually provide hydraulic oil during brake force is correct, and hydraulic oil smoothly flows into brake apparatus.
In order to ensure being properly positioned for each spring, projectedly it is provided in each piston and the contact surface of respective springs
The positioning convex platform matched with spring inside diameter guarantees that each spring is always positioned at during the work time in the axial location of setting,
It prevents from deviating.As shown in figure 8, since the two sides of the pedal sense simulator second piston 21 are provided with spring, institute
The two sides for stating pedal sense simulator second piston 21 are medially provided with the positioning convex platform to match with spring inside diameter, thus
The axis of two lateral springs is set to coincide always with the axis of cylinder body.
It is former to the work of the integral type pedal sense simulator provided by the above embodiment with fail safe function below
Reason is described further.
As illustrated in figs. 1 and 2, when the embodiment of the present invention, which is in On-line Control, to be moved under working condition, foot steps on brake pedal
1, thrust is reached decoupling sleeve 3 by the push rod 2 limited through car body guiding mechanism.Since normally closed solenoid valve 5 is upper electric-opening at this time
State, the master cylinder drive cavity 27 complemented each other to form at this time by the bar portion of decoupling sleeve 3 and master cylinder first piston 17
It is connected to oil storage cup 7, the oil liquid in master cylinder drive cavity 27 can reach oil storage cup 7, braking master once compression through oil liquid pipeline 4
Oil liquid in cylinder drive cavity 27 does not have the effect of rigid body transmission；Since normally open solenoid valve 6 is at this time to power on closed state, at this time
By the bar portion phase of decoupling sleeve 3, pedal sense simulator first piston 24, integral type cylinder body 8 and master cylinder first piston 17
The pedal sense simulator drive cavity 25 mutually cooperatively formed is disconnected with oil storage cup 7, in the pedal sense simulator drive cavity 25
Oil liquid be sealed in chamber, the indoor oil liquid of chamber can play the role of rigid body transmission, pedal sense simulator first piston
24 are pushed.When the push rod 2 pushes decoupling sleeve 3 to move downward, the oil liquid in master cylinder drive cavity 27 is through oil liquid pipeline
4, normally closed solenoid valve 5 flows to oil storage cup 7, and master cylinder first piston 17 is in the first spring of master cylinder 15 and master cylinder second
Remained stationary under the action of 10 pretightning force of spring, the oil liquid in pedal sense simulator drive cavity 25 through decouple sleeve 3 compress into
And pedal sense simulator first piston 24 is pushed to move downward along the bar portion of master cylinder first piston 17, pedal sense mould
Quasi- device second piston 21 is moved downward along the bar portion of master cylinder first piston 17 under spring force, pedal sense at this time
Feel that the first spring of simulator 23 and pedal sense simulator second spring 19 are equivalent to series connection, equivalent spring rigidity are as follows:
Wherein, R1For the rigidity of the first spring of pedal sense simulator 23, R2For pedal sense simulator second spring 19
Rigidity.Under the action of thrust, pedal sense simulator first piston 24 and pedal sense simulator second piston 21 continue to
Left movement, when pedal sense simulator second piston 21, which moves to same limited block 20, to be in contact, pedal sense simulator second
Spring 19 will no longer be compressed, equivalent spring rigidity R1, the as rigidity of the first spring of pedal sense simulator 23, by rigid
The change of degree, to keep pedal feedback more consistent to the reaction force of foot and true brake condition.The above-mentioned course of work
As On-line Control of the embodiment of the present invention moves the schematic diagram under working condition, realizes the decoupling of brake operating and braking execution,
And the pedal sense of Conventional braking systems is simulated using two sections of different spring rates, as shown in figure 9, being to simulate
Stroke-pedal force characteristic curve.
As described in fig. 3 and fig. 4, when the embodiment of the present invention, which is in On-line Control, to be moved under failure conditions, foot steps on brake pedal
1, thrust is reached decoupling sleeve 3 by the push rod 2 limited through car body guiding mechanism.Due to being electrically turn off under normally closed solenoid valve 5, at this time by
The master cylinder drive cavity 27 that the bar portion of decoupling sleeve 3 and master cylinder first piston 17 complements each other to form is disconnected with oil storage cup 7
It opens, the oil liquid in master cylinder drive cavity 27 is sealed in chamber, and the indoor oil liquid of chamber can play the role of rigid body transmission；By
In the lower electric-opening of normally open solenoid valve 6, at this time by decoupling sleeve 3, pedal sense simulator first piston 24,8 and of integral type cylinder body
The pedal sense simulator drive cavity 25 that the bar portion of master cylinder first piston 17 complements each other to form is connected to oil storage cup 7, institute
The oil liquid stated in pedal sense simulator drive cavity 25 can reach oil storage cup once compression through oil liquid pipeline, and the indoor oil liquid of chamber rises
Less than the effect of rigid body transmission, pedal sense simulator first piston 24 cannot be pushed.When push rod 2 push decoupling sleeve 3 to
Left movement, the oil liquid in master cylinder drive cavity 27 are compressed and then master cylinder first piston 17 are pushed to move downward, at this time
Under spring force, master cylinder second piston 12 also moves downward, and the oil liquid in master cylinder chamber 13 is once compression
Brake piping can be reached by the first fluid hole 14, the second fluid hole 16, realize braking, reach fail safe function.And at this time
Oil liquid in pedal sense simulator drive cavity 25 reaches oil storage cup 7, pedal sense simulation through oil liquid pipeline, normally open solenoid valve 6
Device first piston 24 remains stationary.The above-mentioned course of work is the principle under the dynamic working condition of On-line Control of the embodiment of the present invention
Figure, ensure that the braking ability under brake-by-wire failure conditions.
Embodiment described above is merely to illustrate the present invention without limiting the scope of the invention.In addition, it should also be understood that, readding
After having read the content of the invention introduced, those skilled in the art can make various changes to the present invention, and such equivalent forms are same
Fall within the range of the application the appended claims restriction.
Claims (10)
1. a kind of integral type pedal sense simulator with fail safe function characterized by comprising
Integral type cylinder body (8), the front and back of the integral type cylinder body passes through gasket (9) respectively and bolt is fixedly installed rear end cap
(11) and drive end bearing bracket (26), the isolation that inner cavity is divided into front chamber and rear two chamber is provided in the integral type cylinder body (8)
Plate (18),
The pedal sense simulator second piston (21) being slidably matched, pedal sense simulator are disposed in the front chamber
First piston (24), decoupling sleeve (3), between the isolation board (18) and pedal sense simulator second piston (21), pedal
Pedal sense simulation is respectively arranged between sense simulator second piston (21) and pedal sense simulator first piston (24)
Device second spring (19) and the first spring of pedal sense simulator (23), the decoupling sleeve (3) are in convex shape, and its rear end is along axis
To being centrally located central blind hole, front end periphery wall be provided with the liquid inlet/outlet (28) for being connected to the central blind hole and with it is described before
The centre bore of end cap, which seals, to be cooperated, on the casing wall between the pedal sense simulator first piston (24) and decoupling sleeve (3)
It is provided with liquid inlet/outlet (32)；
The master cylinder second piston (12) being slidably matched and master cylinder first piston are disposed in the rear chamber
(17), between the master cylinder second piston (12) and rear end cap (11), the master cylinder second piston (12) and braking
Master cylinder second spring (10) and the first spring of master cylinder (15) are respectively arranged between master cylinder first piston (17), it is described
Successively live with the isolation board (18), pedal sense simulator second to the bar portion movable sealing of master cylinder first piston (17)
Plug (21), pedal sense simulator first piston (24) centre bore, decouple sleeve (3) central blind hole be slidably matched；It is described
Be provided on casing wall between rear end cap (11) and master cylinder second piston (12) with certain distance being staggered along the axial cylinder
Two fluid infusion holes (36) and the first fluid hole (14), the master cylinder second piston (12) and master cylinder first piston (17) it
Between casing wall on be provided with the first fluid infusion hole (35) and the second fluid hole (16) with being staggered certain distance along the axial cylinder；
Brake pedal (1) and push rod (2), one end of the push rod (2) are articulated with brake pedal (1), and the other end and decoupling cover
Cylinder (3) front end is hinged, and limits push rod (2) linear motion by car body guiding mechanism, brake pedal (1) thrust is reached decoupling
Sleeve (3)；
Oil storage cup (7), the oil storage cup (7) connect by each fluid infusion hole of piping connection, by normally closed solenoid valve (5) and pipeline respectively
It connects the first liquid inlet/outlet (28) of decoupling sleeve (3), connect second liquid inlet/outlet by normally open solenoid valve (6) and management
(32)。
2. the integral type pedal sense simulator according to claim 1 with fail safe function, which is characterized in that institute
It states and is provided with limited block (20) in the ante-chamber chamber interior walls between isolation board (1) and pedal sense simulator second piston (21).
3. the integral type pedal sense simulator according to claim 1 with fail safe function, which is characterized in that institute
It states and is provided with the second sealing ring (30) on the periphery wall that decoupling sleeve (3) is slidably matched with the ante-chamber chamber interior walls.
4. the integral type pedal sense simulator according to claim 1 with fail safe function, which is characterized in that institute
It states and is provided with the on master cylinder first piston (17) and the periphery wall that is slidably matched of decoupling sleeve (3) central blind hole inner wall
One sealing ring (29).
5. the integral type pedal sense simulator according to claim 1 with fail safe function, which is characterized in that institute
Periphery wall, the pedal sense that pedal sense simulator first piston (2) are slidably matched with the ante-chamber chamber interior walls is stated to simulate
The 4th sealing ring (33) and third sealing ring are respectively arranged on the centre bore inside of device first piston (2) and bar portion cooperation
(31)。
6. the integral type pedal sense simulator according to claim 1 with fail safe function, which is characterized in that institute
It states and is provided with the 5th sealing ring (34) on the periphery wall that master cylinder first piston (17) are slidably matched with the back cavity chamber interior walls.
7. the integral type pedal sense simulator according to claim 1 with fail safe function, which is characterized in that institute
State the bottom that the first liquid inlet/outlet (28) are located at the central blind hole.
8. the integral type pedal sense simulator according to claim 1 with fail safe function, which is characterized in that institute
Stating the second liquid inlet/outlet (32), closely the pedal sense simulator first piston (24) sets towards the side for decoupling sleeve (3)
It sets.
9. the integral type pedal sense simulator according to claim 1 with fail safe function, which is characterized in that institute
It states the first fluid hole (14) one end that closely the integral type cylinder body (8) installs rear end cap (11) to be arranged, second fluid infusion hole
(36) closely the master cylinder second piston (12) is arranged towards the side of rear end cap (11)；Second fluid hole (16) is tight
It suffers the master cylinder second piston (12) to be arranged towards the side of the master cylinder first piston (17), first fluid infusion
Closely the master cylinder first piston (17) is arranged towards the side of the master cylinder second piston (12) in hole (35).
10. the integral type pedal sense simulator according to claim 1 with fail safe function, which is characterized in that
There are the installation hole locations for hinged car body on the brake pedal (1).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910581457.9A CN110228456A (en) | 2019-06-29 | 2019-06-29 | A kind of integral type pedal sense simulator with fail safe function |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910581457.9A CN110228456A (en) | 2019-06-29 | 2019-06-29 | A kind of integral type pedal sense simulator with fail safe function |
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| Publication Number | Publication Date |
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| CN110228456A true CN110228456A (en) | 2019-09-13 |
Family
ID=67857710
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910581457.9A Pending CN110228456A (en) | 2019-06-29 | 2019-06-29 | A kind of integral type pedal sense simulator with fail safe function |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115384468A (en) * | 2022-09-05 | 2022-11-25 | 浙江极氪智能科技有限公司 | Braking system and vehicle |
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| CN103318162A (en) * | 2013-05-09 | 2013-09-25 | 同济大学 | Pedal decoupling type and integrated type brake master cylinder assembly for measuring integrated pedal displacement |
| CN204264124U (en) * | 2014-11-20 | 2015-04-15 | 常熟理工学院 | For the pedal sense simulator of automobile line control brake system |
| CN107499296A (en) * | 2017-07-25 | 2017-12-22 | 上海齐思汽车服务有限公司 | Electro-hydraulic brake system and Electro-hydraulic brake method |
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| JP2005153582A (en) * | 2003-11-21 | 2005-06-16 | Advics:Kk | Brake hydraulic pressure generating device for vehicle |
| CN101879891A (en) * | 2010-06-29 | 2010-11-10 | 浙江亚太机电股份有限公司 | Simulator for feeling automobile brake pedal |
| CN103318162A (en) * | 2013-05-09 | 2013-09-25 | 同济大学 | Pedal decoupling type and integrated type brake master cylinder assembly for measuring integrated pedal displacement |
| CN204264124U (en) * | 2014-11-20 | 2015-04-15 | 常熟理工学院 | For the pedal sense simulator of automobile line control brake system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115384468B (en) * | 2022-09-05 | 2023-12-12 | 浙江极氪智能科技有限公司 | Braking system and vehicle |
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