CN108327694A - Step on the Electric booster in sense simulator and line traffic control brake fluid system - Google Patents
Step on the Electric booster in sense simulator and line traffic control brake fluid system Download PDFInfo
- Publication number
- CN108327694A CN108327694A CN201810174303.3A CN201810174303A CN108327694A CN 108327694 A CN108327694 A CN 108327694A CN 201810174303 A CN201810174303 A CN 201810174303A CN 108327694 A CN108327694 A CN 108327694A
- Authority
- CN
- China
- Prior art keywords
- piston
- cavity
- solenoid valve
- compressed spring
- sense simulator
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- 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
-
- 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
- B60T13/12—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 the fluid being liquid
- B60T13/14—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 the fluid being liquid using accumulators or reservoirs fed by pumps
- B60T13/142—Systems with master cylinder
Abstract
The invention discloses a kind of Electric boosters stepped in sense simulator and line traffic control brake fluid system, and it includes shell to step on sense simulator comprising coaxial arrangement and sequentially connected first cavity and the second cavity；The first piston being slideably positioned in the first cavity, the second piston being slideably positioned in the second cavity；First piston and second piston coaxial arrangement, one end of first piston is the connecting pin for being connect with brake pedal mandril, one end of second piston is the promote-side that can push master cylinder mandril, and the other end of first piston and the other end of second piston are close to each other and have gap L；The first compressed spring being set between first piston and second piston；It is set to the second compressed spring that second piston is used to support in the second cavity；The pretightning force of second compressed spring is more than the pretightning force of the first compressed spring, and the other end of second piston presses on the junction of the first cavity and the second cavity.It steps on sense simulator and improves energy recovery rate and comfort.
Description
Technical field
The present invention relates to automobile braking device technical field, more particularly to one kind stepping on sense simulator and line traffic control Hydraulic braking system
Electric booster in system.
Background technology
With putting more effort both at home and abroad to emission request management and control, new-energy automobile has been increasingly becoming hot issue.New energy
Automobile compared to traditional fuel-engined vehicle, except with efficient, discharge less, in addition to the advantages such as low noise, also using electricity when braking
Mechanism is moved to realize that energy regenerating recycles, and is effectively improved the service efficiency of energy, therefore new-energy automobile is to braking system
More stringent requirements are proposed for system.
For the defect of transmission braking system, line traffic control brake fluid system has been gradually appeared currently on the market, that is, uses electricity
Machine aided power substitutes the vacuum servo of transmission.
But the line traffic control brake fluid system of volume production currently on the market, non-decoupling formula braking system is generally used, due to
Brake pedal, in the presence of being rigidly connected, under active braking conditions, slips, to driving with master cylinder mandril under brake pedal meeting is automatic
Person brings sense of insecurity, influences comfort of the user in braking process；In addition, when vehicle deceleration and braking, the fortune of vehicle
Energy is changed into thermal energy by braking system.Brake energy recovering system can realize that part is made by vehicle motor reversal
It is dynamic, while by the partial brake energy storage in vehicle battery, to realize Brake energy recovery.Due to brake pedal and system
There is coupling in dynamic master cylinder, Brake energy recovery can not be realized to the greatest extent in braking process.Also, due to brake pedal and system
There is rigid connection in dynamic master cylinder, while stepping on brake pedal, master cylinder is necessarily caused to build pressure, generate corresponding deceleration,
Cause motor regenerative braking power to be directly superimposed upon on original friction brake force, does not adjust original friction brake force, energy regenerating
Rate is low, and braking comfort is poor.
Therefore, energy recovery rate and braking comfort how to be improved, it has also become those skilled in the art are urgently to be resolved hurrily to be asked
Topic.
Invention content
In view of this, the present invention provides sense simulator is stepped in a kind of line traffic control brake fluid system, to improve line traffic control liquid
Energy recovery rate when braking system being pressed to carry out power brake and braking comfort.The present invention also provides one kind having above-mentioned step on
Feel the Electric booster of simulator.
To achieve the above object, the present invention provides the following technical solutions：
It can be seen from the above technical scheme that provided by the invention
One kind stepping on sense simulator, including：
Shell, the shell include coaxial arrangement and sequentially connected first cavity and the second cavity；
The first piston being slideably positioned in first cavity, second be slideably positioned in second cavity live
Plug；The first piston and second piston coaxial arrangement, one end of the first piston be for brake pedal mandril
One end of the connecting pin of connection, the second piston is the promote-side that can push master cylinder mandril, the first piston
The other end of the other end and the second piston is close to each other and has gap L；
The first compressed spring being set between the first piston and the second piston；
It is set to the second compressed spring that the second piston is used to support in second cavity；Wherein, described second
The pretightning force of compressed spring is more than the pretightning force of first compressed spring, so that the other end of the second piston presses on institute
State the junction of the first cavity and second cavity.
Optionally, above-mentioned to step in sense simulator, the gap L is that vehicle deceleration is brake pedal when it is expected deceleration
The stroke of mandril.
Optionally, above-mentioned to step in sense simulator, the equal stiffness of the second compressed spring described in first compressed spring, and
When the gap L is eliminated, the elastic restoring force phase of the elastic restoring force of second compressed spring and first compressed spring
Deng.
Optionally, above-mentioned to step in sense simulator, the shell includes procapsid part and the tool for having first cavity
There is the back housing portion of second cavity；
First cavity, which has, prevents the first piston by the procapsid partially away from the back housing portion
The prelocalization portion that side slips；Second cavity, which has, prevents the second piston by the back housing portion far from before described
The rear positioning region that the side of housing parts slips.
Optionally, above-mentioned to step in sense simulator, further include：
The stroke sensor of the stroke of the brake pedal mandril is connect and is used to detect with the brake pedal mandril；
Hydrostatic sensor for detecting hydraulic pressure suffered by the first piston；
Accumulator；
It is connected to the first flow of first cavity and the accumulator, the first electromagnetism is provided on the first flow
Valve；
Liquid storage pot；
It is connected to the second flow channel of the liquid storage pot and second cavity, the second flow channel is provided with second solenoid valve,
The accumulator is series in the second flow channel and is connected with second cavity；The stroke sensor, the hydraulic pressure pass
Sensor, first solenoid valve are provided in the second solenoid valve and are connect for the communications connecting of the ECU with Electric booster
Mouthful, during carrying out power brake, first solenoid valves are opened, and the second solenoid valve, which is powered, closes.
Optionally, above-mentioned to step in sense simulator, first solenoid valve and the second solenoid valve are check valve.
The present invention also provides the Electric boosters in a kind of line traffic control brake fluid system, including as described in any of the above-described
Step on sense simulator and master cylinder, the ECU and transmission mechanism, the transmission mechanism includes the master cylinder mandril
And driving motor, the sense simulator of stepping on are connected by the transmission mechanism with the master cylinder, the ECU is also electric with vehicle
Machine connects；During carrying out power brake, the ECU controls the vehicle motor reversal, realizes vehicle braking.
Optionally, in above-mentioned Electric booster, include in the sense simulator of stepping on：The stroke sensor, the hydraulic pressure
Sensor, the accumulator, the first flow, first solenoid valve, the liquid storage pot, the second flow channel, described
In the case of two solenoid valves, the stroke of the brake pedal mandrils of the ECU detected by the stroke sensor is sentenced
Disconnected whether to carry out power brake, if carrying out power brake, first solenoid valves are opened, and the second solenoid valve, which is powered, closes
It closes, the ECU controls the vehicle motor reversal.
Optionally, in above-mentioned Electric booster, further include：The ECU described in the preset duration is according to the stroke sensor
Liquid suffered by the stroke of the detected brake pedal mandril and the first piston detected by the hydrostatic sensor
Pressure adjusts the openings of sizes of first solenoid valve.
Optionally, in above-mentioned Electric booster, further include：When the travel sensor failure, the ECU is according to
Hydraulic pressure suffered by the first piston detected by hydrostatic sensor judges whether to power brake, while braking is lighted in control
Warning lamp.
Provided by the invention to step on sense simulator, the other end of first piston and the other end of second piston are close to each other and have
There is gap L, also, the first compressed spring is set between first piston and second piston.Also, the preload of the second compressed spring
Power is more than the pretightning force of the first compressed spring, so that the other end of second piston presses on the connection of the first cavity and the second cavity
Place.Therefore, in the starting stage for carrying out power brake process, i.e., low decelerating phase, due to the other end of first piston and second
The other end of piston has gap L, and the pretightning force of the second compressed spring is more than the pretightning force of the first compressed spring, so that second
The other end of piston presses on the junction of the first cavity and the second cavity, so first piston and second piston are non-contact
, it ensure that and do not influence each other between master cylinder and brake pedal, realize the solution between master cylinder and brake pedal
Coupling characteristic.Combine the gap L and the first compressed spring and the second compressed spring be set as braking system amplitude peak into
Row Brake energy recovery provides buffering area, ensure that in the entire higher region of Brake energy recovery rate, i.e., low deceleration rank
Section, hydraulic braking is auxiliary braking, and when only demand braking force is bigger, hydraulic braking just can be intervened formally.Due to above-mentioned
Step on sense simulator so that there are Decoupling Characteristics, the brake pedal sense of entire braking process is not between master cylinder and brake pedal
It can be influenced by hydraulic feedback, Brake energy recovery will not be intervened mutually with brake pedal sense, therefore can be controlled by algorithm
Vehicle motor reversal speed ensures that Brake energy recovery rate reaches maximum.Also, by above-mentioned setting, avoid brake pedal with
The initial period of brake pedal is stepped in the rigid connection of master cylinder, and master cylinder is avoided to build pressure and generate corresponding deceleration,
It avoids motor regenerative braking power to be directly superimposed upon on original friction brake force, effectively increases energy recovery rate, also improve
Comfort of the user in braking process, avoids bringing sense of insecurity to driver.
The present invention also provides the Electric boosters in a kind of line traffic control brake fluid system.Sense simulation utensil is stepped on due to above-mentioned
There is above-mentioned technique effect, it also should be with same technique effect, herein no longer with the above-mentioned Electric booster for stepping on sense simulator
It is discussed in detail.
Description of the drawings
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
Obtain other attached drawings according to these attached drawings.
Fig. 1 is the whole axonometric schematic diagram of Electric booster provided in an embodiment of the present invention；
Fig. 2 is the internal sectional schematic diagram of Electric booster provided in an embodiment of the present invention；
Fig. 3 is the partial structurtes enlarged diagram of part A in Fig. 2；
Fig. 4 is the principle schematic diagram of Electric booster provided in an embodiment of the present invention.
Specific implementation mode
The invention discloses one kind stepping on sense simulator, to improve energy when line traffic control brake fluid system carries out power brake
The rate of recovery and braking comfort.The present invention also provides a kind of with the above-mentioned Electric booster for stepping on sense simulator.
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation describes, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
As shown in Figure 1, Figure 2 and Figure 3, provided in an embodiment of the present invention to step on sense simulator, including：Shell, first piston 11,
Second piston 13, the first compressed spring 12 and the second compressed spring 14, shell include coaxial arrangement and sequentially connected first chamber
Body and the second cavity, first piston 11 and second piston 13 are coaxially disposed；First piston 11 is slideably positioned in the first cavity, the
One end of one piston 11 is the connecting pin for being connect with brake pedal mandril；Second piston 13 is slideably positioned in the second cavity
Interior, one end of second piston 13 is the promote-side that can push master cylinder mandril 21, the other end of first piston 11 and second
The other end of piston 13 is close to each other and has gap L；First compressed spring 12 is set to first piston 11 and second piston 13
Between；Second compressed spring 14, which is set in the second cavity, is used to support second piston 13.Wherein, the second compressed spring 14 is pre-
Clamp force is more than the pretightning force of the first compressed spring 12, so that the other end of second piston 13 presses on the first cavity and the second cavity
Junction.
It is provided in an embodiment of the present invention to step on sense simulator, the other end of first piston 11 and the other end phase of second piston 13
Mutually close to and there is gap L, also, the first compressed spring 12 is set between first piston 11 and second piston 13.Therefore,
Not over mechanical connection between one piston 11 and second piston 13, also, the pretightning force of the second compressed spring 14 is more than first
The pretightning force of compressed spring 12, so that the other end of second piston 13 presses on the junction of the first cavity and the second cavity, that is,
The gap L is located in the first cavity, and reduces with the compression clearance L of the first compressed spring 12.The gap L be braking system most
It significantly carries out Brake energy recovery and provides buffering area, ensure that in the entire higher region of Brake energy recovery rate, i.e., it is low
In the deceleration stage, hydraulic braking is auxiliary braking, and when only demand braking force is bigger, hydraulic braking just can be intervened formally.
Sense simulator is stepped on due to above-mentioned so that the above-mentioned Electric booster for stepping on sense simulator of application has Decoupling Characteristics, entirely brakes
The brake pedal sense of journey will not be influenced by hydraulic feedback, and Brake energy recovery will not be intervened mutually with brake pedal sense, because
This can be controlled by algorithm ensures that Brake energy recovery rate reaches maximum.Also, by above-mentioned setting, avoid pedal and braking
The initial period of brake pedal is stepped in the rigid connection of master cylinder, is avoided master cylinder from building pressure and generate corresponding deceleration, is avoided
Motor regenerative braking power is directly superimposed upon on original friction brake force, is effectively increased energy recovery rate, is also improved use
Comfort of the family in braking process, avoids bringing sense of insecurity to driver.
It is mainly used in the Electric booster in line traffic control brake fluid system it is understood that stepping on sense simulator.
It is understood that in the present embodiment, the diameter of the first cavity is less than the diameter of the second cavity, therefore so that
The junction of first cavity and the second cavity forms hierarchic structure, and the other end of second piston 13 presses on the rank of the hierarchic structure
On tread.
The diameter of the first cavity can also be made to be greater than or equal to the diameter of the second cavity, in the first cavity and the second cavity
Junction setting positioning protrusion equally may be implemented in order to which the other end of second piston 13 presses on the positioning protrusion
State effect.
Further, gap L is the stroke that vehicle deceleration is brake pedal mandril when it is expected deceleration.It is appreciated that
It is, it is tight in order to guarantee to carry out for decoupling type Electric booster (i.e. using the above-mentioned Electric booster for stepping on sense simulator)
Anxious braking, therefore gap L is not the bigger the better.Reach 0.3g (g is acceleration of gravity) or more due to working as vehicle braking deceleration
When, Brake energy recovery is extremely inefficient.Therefore, in order to both ensure that Brake energy recovery rate can maximize, while having ensured
At emergency braking, it is expected that deceleration is preferably 0.3g.
Since the pretightning force of the second compressed spring 14 is more than the pretightning force of the first compressed spring 12.In the initial of braking process
Stage, second piston 13 close to one end of first piston 11 two end faces respectively by the pretightning force of the first compressed spring 12 and
The pretightning force of second compressed spring 14, that is, first compressed spring and suffered by one end of first piston 11 of second piston 13
Direction of the resultant direction far from master cylinder mandril 21 of two compressed springs 14, second piston 13 can be with the first chamber in this case
Body shell body is permanently connected to, and will not be exerted a force to the direction of master cylinder mandril 21.
Wherein, in a kind of specific implementation mode of the embodiment of the present invention, the first compressed spring 12 and the second compressed spring
14 equal stiffness；Also, when gap L is eliminated, the elasticity of the elastic restoring force of the second compressed spring 14 and the first compressed spring 12
Restoring force is equal.By rationally designing the preload force value of the first compressed spring 12 and the second compressed spring 14, ensure to disappear in gap L
Except when, the elastic restoring force of the second compressed spring 14 is equal with the elastic restoring force of the first compressed spring 12, entire to ensure
The ride comfort of pedal sense in braking process.
When the elastic restoring force of the second compressed spring 14 is equal with the elastic restoring force of the first compressed spring 12, by making
14 equal stiffness of first compressed spring 12 and the second compressed spring is more than first in conjunction with the pretightning force of above-mentioned second compressed spring 14
The pretightning force of compressed spring 12, you can realize the consistency of braking stiffness in entire braking process, while realizing brake pedal
The decoupling of mandril and master cylinder mandril 21.
Optionally, shell includes the procapsid part 1a with the first cavity and the back housing portion with the second cavity
1b；First cavity has the prelocalization for preventing first piston 11 from being slipped by sides of the procapsid part 1a far from back housing portion 1b
Portion；Second cavity has the rear positioning for preventing second piston 13 from being slipped by sides of the back housing portion 1b far from procapsid part 1a
Portion.By above-mentioned setting, the assembling for stepping on sense simulator is facilitated.
As shown in Figure 1, the present invention also provides a kind of Electric booster, including master cylinder part 4, further include as above-mentioned
It is any to step on sense simulator 1；The master cylinder mandril of master cylinder part 4 can be pushed by stepping on the second piston 13 of sense simulator 1
21.Since above-mentioned sense simulator 1 of stepping on has above-mentioned technique effect, there is the above-mentioned Electric booster for stepping on sense simulator 1 should also have
There is same technique effect, is no longer discussed in detail herein.
In the present embodiment, Electric booster includes stepping on sense simulator part 1, controller part 2, running part 3 and system
Dynamic master cylinder part 4.
Optionally, the promote-side of second piston 13 is contacted with master cylinder mandril 21 towards the end face for stepping on sense simulator.It is logical
Cross above-mentioned setting, it is ensured that second piston 13 can push the master cylinder mandril 21 of master cylinder part 4, also ensure braking
Master cylinder mandril 21 can not but drag the movement of second piston 13, to ensure that motor movement will not have an impact to stepping on sense simulator.
As shown in figure 4, sense simulator provided in an embodiment of the present invention of stepping on further includes：Sensing for detecting pedal state
Device；Accumulator 19；It is connected to the first flow of the first cavity and accumulator 19, the first solenoid valve 17 is provided on first flow；Storage
Liquid pot 5；It is connected to the second flow channel of liquid storage pot 5 and the second cavity, second flow channel is provided with second solenoid valve 18, and accumulator 19 is connected
It is connected in second flow channel and with the second cavity；Sensor, the first solenoid valve 17, be provided in second solenoid valve 18 for
The communication interface of ECU (Electronic ControlUnit, electronic control unit) connections.ECU is according to the sensor received
Inductive signal, the first solenoid valve 17 of control, second solenoid valve 18 and driving motor 6 are run.Driving motor 6 provides power-assisted,
During carrying out power brake, the first solenoid valve 17, which is powered, to be opened, and second solenoid valve 18, which is powered, closes.ECU is located at controller portion
Divide inside 2.
Sensor includes the stroke sensor 15 of the stroke for detecting brake pedal mandril；For detecting first piston 11
The hydrostatic sensor 16 of suffered hydraulic pressure.Stroke sensor 15 is used to detect the stroke of brake pedal, captures operator brake and is intended to,
Therefore, stroke sensor 15 is connect with brake pedal mandril；Hydrostatic sensor 16 is used to test the hydraulic pressure suffered by first piston 11,
To detection step on sense simulator build pressure it is whether normal.Wherein, stroke sensor 15 can mutual calibration with hydrostatic sensor 16；And
And stroke sensor 15 and the detection signal of hydrostatic sensor 16 as the first solenoid valve 17 and second solenoid valve 18 and are driven
The input signal of motor 6.
Optionally, provided in an embodiment of the present invention to step in sense simulator, the first solenoid valve 17 and second solenoid valve 18 are single
To valve.First solenoid valve 17 is connected along the direction of the 19 to the first cavity of accumulator；Second solenoid valve 18 is along the 5 to the second chamber of liquid storage pot
The direction of body is connected.By arrange parameter, when ensureing to release braking, as the hydraulic pressure in the first cavity is less than the liquid of accumulator 19
It presses, the fluid in accumulator 19 can enter the first cavity by the first solenoid valve 17, ensure that the normal return of brake pedal, braking are stepped on
Plate is preferable with feel；Hydraulic pressure is less than 5 hydraulic pressure of liquid storage pot in second cavity, and the fluid in liquid storage pot 5 can pass through second solenoid valve 18
Into the second cavity, ensure that 21 normal return of master cylinder mandril, brake force can be released normally.It ensure that and releasing braking
When, brake pedal and master cylinder mandril 21 can normal return, without fitting well property of brake pedal difference or braking solution
The case where except delaying.
The embodiment of the present invention additionally provides a kind of Electric booster, including any steps on sense simulator as above-mentioned.Due to upper
It states Electric booster to have above-mentioned technique effect, the line traffic control brake fluid system with above-mentioned Electric booster also should be with same
Technique effect, be no longer discussed in detail herein.
In the present embodiment, it includes stroke sensor 15, hydrostatic sensor 16, the first solenoid valve 17, the to step on sense simulator
Two solenoid valves 18, accumulator 19 and liquid storage pot 5.Electric booster includes stepping on sense simulator, master cylinder, ECU and transmission mechanism,
Transmission mechanism includes master cylinder mandril 21 and driving motor 6.
It steps on sense simulator to connect with master cylinder by transmission mechanism, steps on the stroke sensor 15 of sense simulator, hydraulic pressure passes
Sensor 16, the first solenoid valve 17, second solenoid valve 18 are connected to by corresponding communication interface on ECU, ECU also with vehicle motor
Connection；The stroke of brake pedal mandrils of the ECU detected by stroke sensor 15 judges whether to power brake, when into
When row power brake, ECU controls the vehicle motor reversal, realizes vehicle braking.
Optionally, the stroke of the brake pedal mandril every preset duration ECU detected by stroke sensor 15 and
Hydraulic pressure suffered by first piston 11 detected by hydrostatic sensor 16 adjusts the openings of sizes of the first solenoid valve 17.Specific control behaviour
Make depending on actual demand.
Wherein, the first solenoid valve 17 is normally closed solenoid valve, that is, when Electric booster powers off, the first solenoid valve 17 is closed；The
Two solenoid valves 18 are normally open solenoid valve, that is, when Electric booster powers off, second solenoid valve 18 is opened.
First solenoid valve 17 is closed in the power-off state, is connected under energized state；Second solenoid valve 18 is in the power-off state
It is connected, is closed under energized state.Accumulator 19 passes through the first solenoid valve 17 and second for storing simulation spring and damping
Solenoid valve 18 is connected with the first cavity and the second cavity for stepping on sense simulator, to realize the feedback of pedal sense.
Under normal brake mode, ECU captures driver intention according to stroke sensor 15, while according to hydrostatic sensor 16
Hydraulic pressure suffered by first piston 11 is detected, signal interaction, braking deceleration are carried out by vehicle CAN signal with vehicle acceleration transducer
It when degree demand is smaller, is mainly braked by brake energy recovering system, i.e., by vehicle motor reversal, is charged to vehicle battery
While, realize that vehicle braking, at this time hydraulic braking assist or be not involved in completely；When braking deceleration demand is larger,
Hydraulic braking supplements the inaccessiable part brake force of brake energy recovering system.
Due between first piston 11 and second piston 13 there are gap L, brake pedal mandril and master cylinder top
The movement of bar 21 will not synchronize, and ensure that in braking process, and Brake energy recovery does not interfere with brake pedal sense.Also, this
In embodiment, the first compressed spring 12 is different from the pretightning force of the second compressed spring 14, and first piston 11 is transported with second piston 13
It is dynamic to synchronize, further ensure that Brake energy recovery does not interfere with brake pedal sense.
In entire braking process, the first solenoid valve 17, which is powered, to be opened, and the fluid in the first cavity passes through the first solenoid valve 17
Into accumulator 19；Second solenoid valve 18, which is powered, closes, and the fluid in the second cavity cannot enter liquid storage pot 5, likewise enter storage
It can device 19.Also, according to stroke sensor 15 and 16 signal of hydrostatic sensor, to the first solenoid valve 17 and second solenoid valve 18 into
Row control, constantly corrects the foot-operated sense of brake pedal.
It is understood that due to being provided with stroke sensor 15 and hydrostatic sensor 16, one of sensor occurs
When failure, another sensor is used as the factor of judgment of the startup of driving motor 6.In the present embodiment, stroke sensing
When device 15 breaks down, hydraulic pressure judges whether to help suffered by first pistons 11 of the ECU detected by hydrostatic sensor 16
Dynamic braking, that is, hydrostatic sensor 16 is detected into hydraulic pressure as input quantity, while braking warning lamp is lighted in ECU controls, illustrates stroke
15 failure of sensor.
When being braked under power blackout situation, since Brake energy recovery mechanism and driving motor 6 all can not work normally,
First solenoid valve 17 and the power-off of second solenoid valve 18 enter default conditions.Front loop fluid is according to emergency braking line-of-road movement：By
It is rigid connection that can regard as with second piston 13 in the fluid in liquid Incoercibility, the first cavity；Oil in second cavity
Liquid is connected to liquid storage pot 5, and without any flowed friction, second piston 13 pushes directly on the movement of master cylinder mandril 21, realizes urgent
Braking.
There is leakage failure, stroke sensor 15, hydrostatic sensor 16 and biography in the internal cavity for such as stepping on sense simulator part 1
When dynamic motor 6 works normally, there is no pedal sense substantially at this time, but can realize normal brake application, while ECU is by calibrating stroke sensing
Device 15 is indicated with the exportable leakage of 16 signal of hydrostatic sensor.
Each embodiment is described by the way of progressive in this specification, the highlights of each of the examples are with other
The difference of embodiment, just to refer each other for identical similar portion between each embodiment.
The foregoing description of the disclosed embodiments enables those skilled in the art to implement or use the present invention.
Various modifications to these embodiments will be apparent to those skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, of the invention
It is not intended to be limited to the embodiments shown herein, and is to fit to and the principles and novel features disclosed herein phase one
The widest range caused.
Claims (10)
1. one kind stepping on sense simulator, which is characterized in that including：
Shell, the shell include coaxial arrangement and sequentially connected first cavity and the second cavity；
The first piston (11) being slideably positioned in first cavity, the second piston being slideably positioned in second cavity
(13)；The first piston (11) and the second piston (13) coaxial arrangement, one end of the first piston (11) be for
The connecting pin being connect with brake pedal mandril, one end of the second piston (13) are that can push master cylinder mandril (21)
Promote-side, the other end of the first piston (11) is close to each other with the other end of the second piston (13) and has gap L；
The first compressed spring (12) being set between the first piston (11) and the second piston (13)；
It is set to the second compressed spring (14) that the second piston (13) is used to support in second cavity；Wherein, described
The pretightning force of second compressed spring (14) is more than the pretightning force of first compressed spring (12), so that the second piston (13)
The other end press on the junction of first cavity and second cavity.
2. stepping on sense simulator as described in claim 1, which is characterized in that the gap L is that vehicle deceleration is it is expected deceleration
The stroke of Shi Suoshu brake pedal mandrils.
3. stepping on sense simulator as described in claim 1, which is characterized in that the first compressed spring (12) second compression
The equal stiffness of spring (14), and when the gap L is eliminated, the elastic restoring force of second compressed spring (14) and described the
The elastic restoring force of one compressed spring (12) is equal.
4. as described in any one of claims 1-3 step on sense simulator, which is characterized in that the shell includes having described first
The procapsid part (1a) of cavity and back housing portion (1b) with second cavity；
First cavity, which has, prevents the first piston (11) by the procapsid part (1a) far from the rear housing section
The prelocalization portion for dividing the side of (1b) to slip；Second cavity, which has, prevents the second piston (13) by the rear housing section
Divide the rear positioning region that side far from described procapsid part (1a) slips (1b).
5. as described in any one of claims 1-3 step on sense simulator, which is characterized in that further include：
The stroke sensor (15) of the stroke of the brake pedal mandril is connect and is used to detect with the brake pedal mandril；
Hydrostatic sensor (16) for detecting hydraulic pressure suffered by the first piston (11)；
Accumulator (19)；
It is connected to the first flow of first cavity and the accumulator (19), the first solenoid valve is provided on the first flow
(17)；
Liquid storage pot (5)；
It is connected to the second flow channel of the liquid storage pot (5) and second cavity, the second flow channel is provided with second solenoid valve
(18), the accumulator (19) is series in the second flow channel and is connected with second cavity；The stroke sensor
(15), the hydrostatic sensor (16), first solenoid valve (17), be provided in the second solenoid valve (18) for electricity
The communication interface of the ECU connections of dynamic booster, during carrying out power brake, first solenoid valve (17), which is powered, opens,
The second solenoid valve (18), which is powered, closes.
6. stepping on sense simulator as claimed in claim 5, which is characterized in that first solenoid valve (17) and second electromagnetism
Valve (18) is check valve.
7. the Electric booster in a kind of line traffic control brake fluid system, which is characterized in that including any one of such as claim 1-6 institutes
That states steps on sense simulator and master cylinder, the ECU and transmission mechanism, and the transmission mechanism includes the master cylinder top
Bar (21) and driving motor (6), the sense simulator of stepping on are connected by the transmission mechanism with the master cylinder, the ECU
Also connected with vehicle motor；During carrying out power brake, the ECU controls the vehicle motor reversal, realizes vehicle system
It is dynamic.
8. Electric booster as claimed in claim 7, which is characterized in that include in the sense simulator of stepping on：The stroke passes
Sensor (15), the hydrostatic sensor (16), the accumulator (19), the first flow, first solenoid valve (17), institute
In the case of stating liquid storage pot (5), the second flow channel, the second solenoid valve (18), the ECU is according to the stroke sensor
(15) stroke of the brake pedal mandril detected by judges whether to power brake, described if carrying out power brake
First solenoid valve (17), which is powered, to be opened, and the second solenoid valve (18), which is powered, closes, and it is anti-that the ECU controls the vehicle motor
Turn.
9. Electric booster as claimed in claim 8, which is characterized in that further include：The ECU described in the preset duration is according to institute
Stroke and the hydrostatic sensor (16) for stating the brake pedal mandril detected by stroke sensor (15) are detected
The first piston (11) suffered by hydraulic pressure adjust the openings of sizes of first solenoid valve (17).
10. Electric booster as claimed in claim 8, which is characterized in that further include：When the stroke sensor (15) failure
When, hydraulic pressure suffered by the first pistons (11) of the ECU detected by the hydrostatic sensor (16) judge whether into
Row power brake, while braking warning lamp is lighted in control.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810174303.3A CN108327694A (en) | 2018-03-02 | 2018-03-02 | Step on the Electric booster in sense simulator and line traffic control brake fluid system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810174303.3A CN108327694A (en) | 2018-03-02 | 2018-03-02 | Step on the Electric booster in sense simulator and line traffic control brake fluid system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108327694A true CN108327694A (en) | 2018-07-27 |
Family
ID=62930216
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810174303.3A Pending CN108327694A (en) | 2018-03-02 | 2018-03-02 | Step on the Electric booster in sense simulator and line traffic control brake fluid system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108327694A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111674373A (en) * | 2020-06-22 | 2020-09-18 | 北京经纬恒润科技有限公司 | Brake pedal feel simulator and brake pedal feel adjusting method |
| CN113085826A (en) * | 2019-12-23 | 2021-07-09 | 比亚迪股份有限公司 | Electric drive hydraulic device, brake system and automobile |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090115244A1 (en) * | 2005-06-29 | 2009-05-07 | Peter Schluter | Brake Power Generator For A Hydraulic Vehicle Braking System |
| DE10258266B4 (en) * | 2001-12-20 | 2013-06-20 | Continental Teves Ag & Co. Ohg | operating unit |
| CN103950443A (en) * | 2014-04-14 | 2014-07-30 | 同济大学 | Pedal feeding active control type electronic hydraulic braking system |
| CN105667484A (en) * | 2016-01-11 | 2016-06-15 | 清华大学 | Wire control brake system driven by two fully decoupled motors |
| CN205440327U (en) * | 2016-03-04 | 2016-08-10 | 吉林大学 | Electronic helping hand braking system with complex function |
-
2018
- 2018-03-02 CN CN201810174303.3A patent/CN108327694A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10258266B4 (en) * | 2001-12-20 | 2013-06-20 | Continental Teves Ag & Co. Ohg | operating unit |
| US20090115244A1 (en) * | 2005-06-29 | 2009-05-07 | Peter Schluter | Brake Power Generator For A Hydraulic Vehicle Braking System |
| CN103950443A (en) * | 2014-04-14 | 2014-07-30 | 同济大学 | Pedal feeding active control type electronic hydraulic braking system |
| CN105667484A (en) * | 2016-01-11 | 2016-06-15 | 清华大学 | Wire control brake system driven by two fully decoupled motors |
| CN205440327U (en) * | 2016-03-04 | 2016-08-10 | 吉林大学 | Electronic helping hand braking system with complex function |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113085826A (en) * | 2019-12-23 | 2021-07-09 | 比亚迪股份有限公司 | Electric drive hydraulic device, brake system and automobile |
| CN113085826B (en) * | 2019-12-23 | 2022-06-14 | 比亚迪股份有限公司 | Electric drive hydraulic device, brake system and automobile |
| CN111674373A (en) * | 2020-06-22 | 2020-09-18 | 北京经纬恒润科技有限公司 | Brake pedal feel simulator and brake pedal feel adjusting method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108501921B (en) | A kind of hydraulic line control brake system and its brake control method with double pressure sources | |
| CN103231705B (en) | Brake pedal feel flexibly settable electro-hydraulic composite braking system | |
| CN103253146B (en) | The pedal decoupling type Electro-hydraulic brake system that integrated pedal displacement is measured | |
| CN101941430B (en) | Hydraulic braking system of four-wheel driven electric vehicle | |
| CN102862484B (en) | Hydraulic braking system for feedback of regenerated braking energy of electric vehicle | |
| US20120056471A1 (en) | Braking System for a Land Vehicle with Regenerative Braking Functionality | |
| CN105774788A (en) | Electric power-assisted braking system with composite functions | |
| JP4976280B2 (en) | Method of operating a brake actuation unit of an automobile brake system | |
| CN104149765B (en) | Car electronic and hydraulic brake system capable of realizing time-sharing control | |
| US9061672B2 (en) | Vehicle brake device and method of controlling vehicle brake device | |
| CN209955966U (en) | Split type electro-hydraulic brake device | |
| JP2008265728A (en) | Vehicle brake system | |
| JP2010500211A (en) | Externally actuated vehicle brake system with electrohydraulic pressure | |
| CN103318158A (en) | Integrated electronic hydraulic brake system of automobile | |
| CN204605776U (en) | There is the line traffic control of manpower amplification and the brake system of power-assisted complex function | |
| JP2007533542A5 (en) | ||
| CN205440327U (en) | Electronic helping hand braking system with complex function | |
| CN103118915A (en) | Master cylinder device | |
| CN209410036U (en) | The commercial automobile-used integrated form air braking system of new energy and its vehicle | |
| CN108327694A (en) | Step on the Electric booster in sense simulator and line traffic control brake fluid system | |
| CN205365566U (en) | Electromechanical braking booster unit | |
| CN103231704A (en) | Electro-hydraulic compound braking system based on hydraulic control unit and integrated braking master cylinder | |
| KR101780066B1 (en) | Regenerative Brake Apparatus and High Efficiency Regenerative Braking Performance Thereof | |
| CN103253250B (en) | A kind of Electro-hydraulic brake system using integrated form brake master cylinder assy | |
| CN106004826B (en) | The braking method of the half decoupling braking system for new-energy automobile regenerative braking |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20180727 |
|
| RJ01 | Rejection of invention patent application after publication |