CN104760587B - Man-machine parallel electric braking booster system and its control method - Google Patents
Man-machine parallel electric braking booster system and its control method Download PDFInfo
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- CN104760587B CN104760587B CN201510209564.0A CN201510209564A CN104760587B CN 104760587 B CN104760587 B CN 104760587B CN 201510209564 A CN201510209564 A CN 201510209564A CN 104760587 B CN104760587 B CN 104760587B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
- B60T13/74—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with electrical assistance or drive
- B60T13/745—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with electrical assistance or drive acting on a hydraulic system, e.g. a master cylinder
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- Braking Systems And Boosters (AREA)
Abstract
The present invention proposes a kind of man-machine parallel electric braking booster system and its control method, and the wherein system includes：Pedal push rod, pedal push rod is driven by brake pedal；Power-assisted plunger, for bearing brake boost or pedal push rod thrust；On power-assisted plunger, the displacement transducer for detecting pedal push rod and power-assisted plunger relative displacement；It is connected with power-assisted plunger, the piston push rod for driving the first brake piston；One end of piston push rod is connected to, the assist motor for increasing or decreasing power-assisted；First brake piston, the first brake piston is connected to the other end of piston push rod, and the first brake piston is accommodated in master cylinder；Assist motor is controlled according to the testing result of displacement transducer, to change the controller that pressure in master cylinder is braked.The system according to the present invention controls assist motor to change master cylinder pressure by the testing result of displacement transducer, fast with response, advantages of simple structure and simple.
Description
Technical field
The present invention relates to automobile technical field, more particularly to a kind of man-machine parallel electric braking booster system and its control
Method.
Background technology
Brake booster is to mitigate driver pedal strength so that the device of braking procedure more fast power-saving.Mesh
Preceding wide variety of brake booster is vacuum booster, and the brake boost that vacuum booster is produced will be driven by mechanical structure
The braking intention for the person of sailing is converted into vacuum braking power-assisted.
The vacuum source of vacuum booster is generally from air intake manifold of automotive engine, if being applied to mixing
Power or electric automobile, because vacuum source is not enough, then need to be equipped with a vavuum pump again., can be with if not being equipped with vavuum pump
Directly brake boost is carried out using electricity.Current Bosch, daily output use using assist motor to carry out the scheme of power-assisted, its
Mainly with motor reinforcement, carry out analysis using pedal push rod absolute displacement (or simulation chamber pressure) and calculate so as to control power-assisted electricity
Machine.But this mode is complicated, and require higher for control system.
The content of the invention
The purpose of the present invention is intended at least solve one of above-mentioned technological deficiency.
Therefore, the present invention provides a kind of man-machine parallel electric braking booster system.The man-machine parallel electric braking power-assisted
Device system can solve complicated in conventional art, control cumbersome response time slow or need separately to arrange vavuum pump
Technical problem.
In view of this, embodiments of the invention propose a kind of man-machine parallel electric braking booster system, and this is man-machine parallel
Electric braking booster system include：Pedal push rod, the pedal push rod is driven by brake pedal；Power-assisted plunger, for bearing
Brake boost or pedal push rod thrust；Displacement transducer, institute's displacement sensors are arranged on the power-assisted plunger, for examining
Survey the pedal push rod and the power-assisted plunger relative displacement；Piston push rod, the piston push rod is connected with the power-assisted plunger,
For driving the first brake piston；Assist motor, the assist motor is connected to one end of the piston push rod, for increase or
Reduce power-assisted；First brake piston, first brake piston is connected to the other end of the piston push rod, first braking
Piston is accommodated in master cylinder；Controller, the controller is helped according to being controlled the testing result of institute's displacement sensors
Force motor, to change pressure in the master cylinder, is controlled with the braking to vehicle.
Helped according to the man-machine parallel electric braking booster system of the present invention by the testing result control of displacement transducer
Force motor is fast with response to change master cylinder pressure, advantages of simple structure and simple.
In an embodiment of the present invention, the relative position of the pedal push rod and the boosting piston includes：Power-assisted section, guarantor
Hold section and return section, when institute's displacement sensors testing result for the pedal push rod the power-assisted section when, the control
Device controls the assist motor to rotate forward increase power-assisted, to be braked to the vehicle.
In an embodiment of the present invention, when the testing result of institute's displacement sensors keeps for the pedal push rod described
Duan Shi, the controller stops operating the assist motor, to keep power-assisted.
In an embodiment of the present invention, when institute's displacement sensors testing result for the pedal push rod in the return
Duan Shi, the controller reversely rotates the assist motor and reduces power-assisted, to be braked to the vehicle.
In an embodiment of the present invention, it is described man-machine parallel when the controller carries out control for brake using regenerative braking
Electric braking booster system also include the adjustment valve for connecting the master cylinder and adjustment chamber volume, the controller is by opening
Close the adjustment valve and the unnecessary brake fluid in the master cylinder is flowed into the adjustment chamber volume.
In an embodiment of the present invention, the controller is according to the real-time meter of stroke and energy regenerating ratio of the piston push rod
The required pressure for obtaining the master cylinder is calculated, when the pressure in the master cylinder is more than the required pressure, institute is opened
State adjustment valve and unnecessary brake fluid pressure is flowed into the adjustment chamber volume.
In embodiments of the invention, the power-assisted plunger is connected with the piston push rod, or using spring damping connection.
In view of this, another embodiment of the present invention proposes a kind of controlling party of man-machine parallel electric braking booster system
Method, the man-machine parallel electric braking booster system includes, and pedal push rod, pushes away for bearing brake boost or pedal push rod
Power power-assisted plunger, the piston push rod being connected with the power-assisted plunger, the assist motor for increasing or decreasing power-assisted, its feature exist
In the control method comprises the following steps：The pedal push rod and the power-assisted plunger relative position are detected, wherein the phase
Position is included：Power-assisted section, maintaining segment and return section；The pedal push rod rotates forward the power-assisted in power-assisted section
Motor is controlled with increasing power-assisted with the braking to vehicle.
The detection that displacement transducer is passed through according to the control method of the man-machine parallel electric braking booster system of the present invention
Output control assist motor is fast with response to change master cylinder pressure, advantages of simple structure and simple.
In an embodiment of the present invention, methods described also includes：The pedal push rod stops operating in the maintaining segment
The assist motor, to keep power-assisted；The pedal push rod is in return section, and the controller reversely rotates the power-assisted
Motor reduces power-assisted, is controlled with the braking to vehicle.
In an embodiment of the present invention, the man-machine parallel electric braking booster system is braked using regenerative braking
During control, the control method also includes：Braked according to the real-time calculating of the stroke of the piston push rod and energy regenerating ratio
The required pressure of master cylinder；When the pressure in the master cylinder is more than the required pressure, adjustment valve is opened by unnecessary system
Hydrodynamic pressure is flowed into adjustment chamber volume.
In view of this, another embodiment of the present invention proposes a kind of control method of electric braking booster system, the electricity
Braking booster system includes, pedal push rod, for bearing brake boost or pedal push rod thrust power-assisted plunger, being helped with described
The connected piston push rod of power plunger, the assist motor for increasing or decreasing power-assisted, it is characterised in that the control method includes
Following steps：The pedal push rod and the power-assisted plunger relative position are detected, wherein the relative position includes：Power-assisted section,
Maintaining segment and return section；The pedal push rod rotates forward the assist motor to increase power-assisted, with right in power-assisted section
The braking of vehicle is controlled.
Helped according to the control method of the electric braking booster system of the present invention by the testing result control of displacement transducer
Force motor is fast with response to change master cylinder pressure, advantages of simple structure and simple.
In an embodiment of the present invention, methods described also includes：The pedal push rod stops operating in the maintaining segment
The assist motor, to keep power-assisted；The pedal push rod is in return section, and the controller reversely rotates the power-assisted
Motor reduces power-assisted, is controlled with the braking to vehicle.
In an embodiment of the present invention, when the electric braking booster system carries out control for brake using regenerative braking, institute
Stating control method also includes：According to needed for the real-time calculating of the stroke of the piston push rod and energy regenerating ratio obtains master cylinder
Pressure；When the pressure in the master cylinder is more than the required pressure, opens adjustment valve and flow into unnecessary brake fluid pressure
To adjustment chamber volume.
In an embodiment of the present invention, the controller controls the process of the assist motor according to institute's displacement sensors
In, relative displacement skew initial position is bigger, and the speed that power-assisted is increasedd or decreased is bigger.Thus, it is possible to more effectively control
Braking.
In an embodiment of the present invention, the controller controls the mode of the assist motor increase power-assisted to include：Control
The corner of the assist motor, or control the moment of torsion of the assist motor.
The additional aspect of the present invention and advantage will be set forth in part in the description, and will partly become from the following description
Obtain substantially, or recognized by the practice of the present invention.
Brief description of the drawings
Of the invention above-mentioned and/or additional aspect and advantage will become from the following description of the accompanying drawings of embodiments
Substantially and be readily appreciated that, wherein,
Fig. 1 is the block diagram of the man-machine parallel electric braking booster system according to the embodiment of the present invention；
Fig. 2 is the specific schematic diagram of the man-machine parallel electric braking booster system according to the embodiment of the present invention；
Fig. 3 is the pedal push rod and the relative position schematic diagram of boosting piston according to the embodiment of the present invention；
Fig. 4 is schematic diagram of the man-machine parallel electric braking booster system of the embodiment of the present invention in power-assisted section；
Fig. 5 is schematic diagram of the man-machine parallel electric braking booster system of the embodiment of the present invention in maintaining segment；
Fig. 6 is schematic diagram of the man-machine parallel electric braking booster system of the embodiment of the present invention in return section；And
Fig. 7 is the flow chart of the control method of the man-machine parallel electric braking booster system according to the embodiment of the present invention.
Embodiment
Embodiments of the invention are described below in detail, the example of embodiment is shown in the drawings, wherein identical from beginning to end
Or similar label represents same or similar element or the element with same or like function.Retouched below with reference to accompanying drawing
The embodiment stated is exemplary, is only used for explaining the present invention, and is not considered as limiting the invention.
In the description of the invention, it is to be understood that term " " center ", " longitudinal direction ", " transverse direction ", " on ", " under ",
The orientation or position relationship of the instruction such as "front", "rear", "left", "right", " vertical ", " level ", " top ", " bottom ", " interior ", " outer " are
Based on orientation shown in the drawings or position relationship, it is for only for ease of the description present invention and simplifies description, rather than indicate or dark
Specific orientation must be had, with specific azimuth configuration and operation by showing the device or element of meaning, therefore it is not intended that right
The limitation of the present invention.In addition, term " first ", " second " are only used for describing purpose, and it is not intended that indicating or implying and be relative
Importance.
In the description of the invention, it is necessary to illustrate, unless otherwise clearly defined and limited, term " installation ", " phase
Even ", " connection " should be interpreted broadly, for example, it may be being fixedly connected or being detachably connected, or be integrally connected；Can
To be mechanical connection or electrical connection；Can be joined directly together, can also be indirectly connected to by intermediary, Ke Yishi
The connection of two element internals.For the ordinary skill in the art, with concrete condition above-mentioned term can be understood at this
Concrete meaning in invention.
Fig. 1 is the block diagram of the man-machine parallel electric braking booster system according to the embodiment of the present invention.As shown in figure 1, root
Include according to the man-machine parallel electric braking booster system of the embodiment of the present invention：Pedal push rod 105, pedal push rod 105 is by braking
Pedal 100 drives.Power-assisted plunger 106, the thrust for bearing brake boost or pedal push rod 105.Displacement transducer 202,
Displacement transducer 202 is arranged on power-assisted plunger 106, for detecting pedal push rod 105 and the relative displacement of power-assisted plunger 106.It is living
Push rod 103 is filled in, piston push rod 103 is connected with power-assisted plunger 106, for driving the first brake piston 107.Assist motor 201, is helped
Force motor 201 is connected to one end of piston push rod 103, for increasing or decreasing power-assisted.First brake piston 107, the first braking
Piston 107 is connected to the other end of piston push rod 103, and the first brake piston 107 is accommodated in master cylinder 111.Controller
302, controller 302 controls assist motor 201 according to the testing result of displacement transducer 202, to change 111 pressure in master cylinder
Power, is controlled with the braking to vehicle.
The man-machine parallel electric braking booster system of the present invention is further described below by Fig. 2.Fig. 2 is root
According to the specific schematic diagram of the man-machine parallel electric braking booster system of the embodiment of the present invention.As shown in Fig. 2 man-machine parallel electricity
Braking booster system is specifically included：The mechanism of 102 nut of leading screw 101 driven by assist motor 201.By the band of brake pedal 100
Dynamic pedal push rod 105.Power-assisted plunger 106 for bearing brake boost and pedal push rod thrust.Mounted in power-assisted plunger 106
On, the relative displacement transducer 202 for measuring pedal push rod and power-assisted plunger, power-assisted plunger 202 is interior to return provided with relative position
Position spring 402.It is connected with power-assisted plunger, the piston push rod 103 for driving the first brake piston 107.Second is provided with master cylinder
Brake piston 110.Provided with power-assisted baffle plate 104 and damping spring damping 401 between leading screw 102 and displacement transducer 202.By adjusting
The adjustment chamber volume 109 that valve 203 is controlled is connected by adjusting valve 203 with master cylinder.Controller BCU302 and displacement sensing
Device 202, assist motor 201, adjustment valve 203 are connected.Master cylinder 111 passes through brake fluid flexible pipe and ABS executing agencies HCU301
And wheel drag 204 is connected.Wherein master cylinder 111, assist motor, adjustment chamber volume all directly or indirectly and vehicle body 108
It is connected.
As shown in Fig. 2 power-assisted baffle plate 104 is slided on piston push rod 103, one end of main force's baffle plate 104 directly bears to help
The brake boost that force motor 201 is brought, the other end of main force's baffle plate 104 is connected with spring damping 401 with power-assisted plunger 106, is led to
Power-assisted plunger 106 is crossed to pass to motor power-assisted on piston push rod 103.Leading screw 102 and nut 101 constitute reinforcement structure, pass through
The rotation of assist motor 201 drives reinforcement structure.Other can also be used in addition to the reinforcement structure being made up of leading screw and nut
Reinforcement structure, such as turbine and worm.
In one embodiment of the invention, pedal push rod 105 is slided on the axle of power-assisted plunger 106, is arranged at power-assisted
On the displacement transducer 202 of plunger 106, the displacement of pedal push rod 105 and power-assisted plunger 106 vertically can be detected, so that directly
Connect the braking intention that driver is perceived according to displacement.In addition, being provided with return between power-assisted plunger 106 and pedal push rod 105
Spring 402, when loosen the brake 100 after power-assisted plunger 106 and the relative position of pedal push rod 105 can return to initial shape
State.
In one embodiment of the invention, return spring 402 is provided between power-assisted plunger 106 and master cylinder 111,
After no longer braking motor reversion power-assisted disappears driver, the work of power-assisted plunger 106 and piston push rod 103 in return spring 402
Initial position is returned under.For produce the force-increasing mechanism (i.e. leading screw 102 and nut 101) of power-assisted and power-assisted baffle plate 104 it
Between can directly be separated without being connected, therefore when being stopped, driver can be by trampling the directly drive of brake pedal 100
Power-assisted plunger 106 and piston push rod 103 produce brake force.
In one embodiment of the invention, the controller 302 of control brake boost is BCU (booster control
Union), assist motor 201 and adjustment valve 203 are controlled for the data according to ECU signals and displacement transducer 202.Position
Displacement sensor 202 can be not take up being integrated between power-assisted plunger 106 and pedal push rod 105 in the form of excessive space with a kind of.
Fig. 3 is the pedal push rod and the relative position schematic diagram of boosting piston according to the embodiment of the present invention.As shown in figure 3,
The relative position of pedal push rod 103 and boosting piston 106 includes：Power-assisted section, maintaining segment and return section.As shown in Figure 2,3, position is worked as
The testing result of displacement sensor 202 be pedal push rod 103 power-assisted section when, controller 302 control assist motor rotate forward increasing
Plus power-assisted, to be braked to vehicle.
Fig. 4 is schematic diagram of the man-machine parallel electric braking booster system of the embodiment of the present invention in power-assisted section.Such as Fig. 4
Shown, when driver starts to want braking, meeting brake pedal 100 drives the power-assisted plunger 106 of pedal push rod 105 to deviate and protected
Hold section and enter power-assisted section.Controller BCU302 reads out the data of displacement transducer 202, and controls assist motor 201 to rotate forward
Force-increasing mechanism is driven to promote power-assisted baffle plate 104 to produce power-assisted.Wherein, the control mode of the control of controller 302 assist motor 201 can
It is unrelated with the size of displacement as set value using the rotating speed for setting power-assisted section in advance, it can also be set according to the diverse location for entering power-assisted section
Fixed different rotating speed.
Fig. 5 is schematic diagram of the man-machine parallel electric braking booster system of the embodiment of the present invention in maintaining segment.Such as Fig. 5
It is shown, when driver wishes to keep now brake force in a certain position of pedal travel, the position of brake pedal 100 can be kept
It is constant.Assist motor 201, which is in, before position due to keeping brake pedal 100 in driver rotates forward power-assisted state, then drives
Piston push rod 103 and power-assisted plunger 106 are moved on, until causing the relative displacement of power-assisted plunger 106 and pedal push rod 105 to enter
Enter maintaining segment, then controller 302 reads the data of displacement transducer 202, and control assist motor 201 is stalled, to keep controling power.
Because maintaining segment has one section of interval, therefore slight jitter of the driver on pedal will not change the state for keeping brake force.
When driver is from the state continuation increasing brake force for keeping brake force, brake pedal 100 has driven pedal
The power-assisted plunger 106 of push rod 105 deviates maintaining segment and enters power-assisted section.Controller 302 reads the data of displacement transducer 202, and
Controlling assist motor 201 to rotate forward drives force-increasing mechanism to promote power-assisted baffle plate 1047 to continue to increase power-assisted.
Fig. 6 is schematic diagram of the man-machine parallel electric braking booster system of the embodiment of the present invention in return section.Such as Fig. 6
It is shown, in power-assisted plunger 106 in the presence of relative position return spring 402, unclamp after pedal, pedal push rod 105 can be returned to
Most right section of power-assisted plunger 106, that is, the return section for causing assist motor 201 to invert.When driver from keep brake force state
Want reduce brake force when, loosen the brake 100 or reduce brake pedal 100 stroke, pedal push rod 105 retract until
Into return section.Controller 302 reads the data of displacement transducer 202, and controls assist motor 201 to invert, in overall return
The return of piston push rod 103 in the presence of spring 402.Wherein, the control mode of the control of controller 302 assist motor 201 can be pre-
The rotating speed for first setting return section is unrelated with the size of displacement as set value, can also be set not according to the diverse location for entering return section
Same rotating speed.
In an embodiment of the present invention, when controller carries out control for brake using regenerative braking, man-machine parallel electric braking
Booster system also includes the adjustment valve 203 of connection master cylinder 111 and adjustment chamber volume 109, and controller is adjusted by being opened and closed
Unnecessary brake fluid in master cylinder is flowed into adjustment chamber volume by valve.
Controller 302 obtains the institute of master cylinder 11 according to the real-time calculating of stroke and energy regenerating ratio of piston push rod 103
Pressure is needed, when the pressure in master cylinder 111 is more than required pressure, adjustment valve 203 is opened and flows into unnecessary brake fluid pressure
To adjustment chamber volume 109.When the pressure in master cylinder 111 is less than required pressure, the control of controller 302 pressure regulator valve 203 is closed
Close.
In one embodiment of the invention, the adjustment chamber volume 109 controlled by adjustment valve 203 is connected on vehicle body,
It can be incorporated on master cylinder 111.Adjustment valve 203 is closed under usual state, when using regenerative braking, controller
Its opening of 302 controls, the first brake piston 107 is driven compression, and brake fluid is pressed into adjustment chamber volume 109 so that braking pressure
Rise smaller.If the first brake piston 107 is driven return, brake fluid is sucked back into master cylinder 111 from adjustment chamber volume 109
It is interior.
Under power down mode, due to not connecting between force-increasing mechanism and baffle plate, it is merely able to transmit extruding force, therefore drive
Member directly can drive pedal push rod 105 to promote power-assisted plunger 106 by brake pedal 100, so as to drive before piston push rod 103
Enter, compression brake master cylinder 111 produces brake force.
In addition, when driver has little time to step on pedal in emergency circumstances, the direct controlled motor of controller 302 is just transferring production
Raw brake boost, to prevent unexpected generation.
The system according to the present invention controls assist motor to change master cylinder pressure by the testing result of displacement transducer
Power, advantages of simple structure and simple fast with response.
Fig. 7 is the flow chart of the control method of the man-machine parallel electric braking booster system according to the embodiment of the present invention.
As shown in fig. 7, the control method of man-machine parallel electric braking booster system according to embodiments of the present invention comprises the following steps：
Pedal push rod and power-assisted plunger relative position are detected, wherein relative position includes：Power-assisted section, maintaining segment and return section (step
101).Pedal push rod rotates forward assist motor to increase power-assisted, (step is controlled with the braking to vehicle in power-assisted section
It is rapid 102).Pedal push rod is in maintaining segment, and stop operating assist motor, to keep power-assisted (step 103).Pedal push rod is in return
Duan Shi, controller reversely rotates assist motor and reduces power-assisted, is controlled (step 104) with the braking to vehicle.
Specifically, step is as follows：1st, it is first determined whether carrying out regenerative braking, if during without regenerative braking, returned
Return, i.e., without the control on adjusting valve；Enter next step when judging to carry out regenerative braking.2nd, 2. contrast master cylinder
Whether pressure is more than required pressure value, no, then closes adjustment valve；It is then to open adjustment valve
Braking procedure is further described below.
In an embodiment of the present invention, when driver starts to want braking, meeting brake pedal 100 drives pedal to push away
The power-assisted plunger 106 of bar 105 deviates maintaining segment and enters power-assisted section.Controller BCU302 reads out the data of displacement transducer 202,
And control assist motor 201 to rotate forward the generation power-assisted of drive force-increasing mechanism promotion power-assisted baffle plate 104.Wherein, the control of controller 302 is helped
The rotating speed that the control mode of force motor 201 can set power-assisted section in advance is unrelated with the size of displacement as set value, can also basis
Diverse location into power-assisted section sets different rotating speeds.
In an embodiment of the present invention, when driver wishes to keep now brake force in a certain position of pedal travel,
The position of brake pedal 100 can be kept constant.Assist motor 201 before position due to keeping brake pedal 100 in driver
In power-assisted state is rotated forward, then piston push rod 103 and power-assisted plunger 106 is driven to move on, until causing the He of power-assisted plunger 106
The relative displacement of pedal push rod 105 enters maintaining segment, then controller 302 reads the data of displacement transducer 202, control power-assisted electricity
Machine 201 is stalled, to keep controling power.Because maintaining segment has one section of interval, therefore slight jitter of the driver on pedal is not
The state for keeping brake force can be changed.If driver from keep brake force state continue increase brake force when, step on braking
Pedal 100, has driven the power-assisted plunger 106 of pedal push rod 105 to deviate maintaining segment and has entered power-assisted section.Controller 302 reads displacement
The data of sensor 202, and control the rotating forward of assist motor 201 to drive force-increasing mechanism to promote the continuation increase of power-assisted baffle plate 1047 to help
Power.
In an embodiment of the present invention, the controller controls the process of the assist motor according to institute's displacement sensors
In, relative displacement skew initial position is bigger, and the speed that power-assisted is increasedd or decreased is bigger.Thus, it is possible to more effectively control
Braking.
In an embodiment of the present invention, the controller controls the mode of the assist motor increase power-assisted to include：Control
The corner of the assist motor, or control the moment of torsion of the assist motor.
In an embodiment of the present invention, in power-assisted plunger 106 in the presence of relative position return spring 402, release is stepped on
After plate, pedal push rod 105 can return to most right section of power-assisted plunger 106, that is, the return section for causing assist motor 201 to invert.When driving
The person of sailing from keep brake force state want reduce brake force when, loosen the brake 100 or reduce brake pedal 100 row
Journey, pedal push rod 105 is retracted until entering return section.Controller 302 reads the data of displacement transducer 202, and controls power-assisted
Motor 201 is inverted, the return of piston push rod 103 in the presence of overall return spring 402.Wherein, the control of controller 302 power-assisted electricity
The rotating speed that the control mode of machine 201 can set return section in advance is unrelated with the size of displacement as set value, can also be according to entrance
The diverse location of return section sets different rotating speeds.
The size that can be deviateed by above-mentioned control according to relative displacement changes motor speed, so as to accelerate or reduce system
Power, which changes, causes the traveling of vehicle more stable, safe.
In an embodiment of the present invention, the control process of adjustment valve is specific as follows：Step A, judges whether to regeneration system
It is dynamic, if during without regenerative braking, returned, i.e., without the control on adjustment valve 203；When judgement carries out regenerative braking
When, into step B.Step B, the institute of master cylinder is obtained according to the real-time calculating of the stroke of piston push rod 103 and energy regenerating ratio
Need pressure.Step C, compares whether pressure in master cylinder 111 is more than required pressure value, if greater than required pressure value, then
Open adjustment valve 203 and unnecessary brake fluid pressure is flowed into adjustment chamber volume 109, otherwise, close adjustment valve 203.
When friction catch is when motor regenerative braking is combined, friction brake force needed under the identical deceleration of automobile compared with
It is small.In order that now driver when brake pedal is to identical travel position total braking force with do not apply regenerative braking when
It is more or less the same, then BCU controls adjustment valve to open, brake fluid enters adjustment chamber volume, when needing brake fluid pressure to raise
Turn off.It is excessively sensitive that this is unlikely to operator brake feel when allowing at the same time using regenerative braking.
Under automobile power-down or special case, as above system features, driver directly can make automobile by pedal
Obtain brake force.When the driver that is in an emergency has little time pedal, BCU control assist motors directly rotate forward drive
Piston push rod produces brake force.Driver individually brake activation system can produce brake force with motor, and this is man-machine parallel
Implication.
According to above-mentioned for description of the invention, by displacement transducer for pedal push rod and power-assisted plunger relative displacement
Detection so that the simple possible that man-machine parallel electric braking booster of the present invention has in the case of normal work
It is servo-actuated with only work characteristics, it is servo-actuated with work characteristics only to instead of vacuum booster, and operator brake has been met well
Characteristic.
Although embodiments of the invention have been shown and described above, it is to be understood that above-described embodiment is example
Property, it is impossible to limitation of the present invention is interpreted as, one of ordinary skill in the art is not departing from the principle and objective of the present invention
In the case of above-described embodiment can be changed within the scope of the invention, change, replace and modification.
Claims (8)
1. a kind of man-machine parallel electric braking booster system, it is characterised in that including：
Pedal push rod, the pedal push rod is driven by brake pedal；
Power-assisted plunger, for bearing brake boost or pedal push rod thrust；
Displacement transducer, institute's displacement sensors are arranged on the power-assisted plunger, for detecting the pedal push rod and described
Power-assisted plunger relative displacement；
Piston push rod, the piston push rod is connected with the power-assisted plunger, for driving the first brake piston；
Assist motor, the assist motor is connected to one end of the piston push rod, for increasing or decreasing power-assisted；
First brake piston, first brake piston is connected to the other end of the piston push rod, first brake piston
It is accommodated in master cylinder；
Controller, the controller controls the assist motor according to the testing result of institute's displacement sensors, described to change
Pressure in master cylinder, is controlled with the braking to vehicle；
When the controller carries out control for brake using regenerative braking, the man-machine parallel electric braking booster system also includes
The adjustment valve of the master cylinder and adjustment chamber volume is connected,
The controller by be opened and closed it is described adjustment valve by the unnecessary brake fluid in the master cylinder be flowed into it is described adjustment hold
Product room.
2. man-machine parallel electric braking booster system as claimed in claim 1, it is characterised in that the pedal push rod and institute
Stating the relative position of power-assisted plunger includes：Power-assisted section, maintaining segment and return section, when the testing result of institute's displacement sensors is institute
Pedal push rod is stated in power-assisted section, the controller controls the assist motor to rotate forward increase power-assisted, with to described
Vehicle is braked.
3. man-machine parallel electric braking booster system as claimed in claim 2, it is characterised in that when institute's displacement sensors
Testing result be the pedal push rod in the maintaining segment, the controller stops operating the assist motor, to keep
Power-assisted.
4. man-machine parallel electric braking booster system as claimed in claim 2, it is characterised in that when institute's displacement sensors
Testing result be the pedal push rod in return section, the controller, which reversely rotates the assist motor, to be reduced and helps
Power, to be braked to the vehicle.
5. man-machine parallel electric braking booster system as claimed in claim 1, it is characterised in that the controller is according to institute
The real-time calculating of stroke and energy regenerating ratio for stating piston push rod obtains the required pressure of the master cylinder, when the master cylinder
When interior pressure is more than the required pressure, opens the adjustment valve and unnecessary brake fluid pressure is flowed into the adjustment volume
Room.
6. man-machine parallel electric braking booster system as claimed in claim 1, it is characterised in that the power-assisted plunger and institute
Piston push rod is stated to be connected, or using spring damping connection.
7. a kind of control method of man-machine parallel electric braking booster system, the man-machine parallel electric braking booster system
Work including, pedal push rod, for bearing brake boost or pedal push rod thrust power-assisted plunger, being connected with the power-assisted plunger
Fill in push rod, the assist motor for increasing or decreasing power-assisted, it is characterised in that the control method comprises the following steps：
The pedal push rod and the power-assisted plunger relative position are detected, wherein the relative position includes：Power-assisted section, maintaining segment
With return section；
The pedal push rod rotates forward the assist motor to increase power-assisted, with the braking to vehicle in power-assisted section
It is controlled；
When the electric braking booster system carries out control for brake using regenerative braking, the control method also includes：
The required pressure of master cylinder is obtained according to the real-time calculating of the stroke of the piston push rod and energy regenerating ratio；
When the pressure in the master cylinder is more than the required pressure, opens adjustment valve and be flowed into unnecessary brake fluid pressure
Adjust chamber volume.
8. the control method of man-machine parallel electric braking booster system as claimed in claim 7, it is characterised in that also wrap
Include：
The pedal push rod is in the maintaining segment, and stop operating the assist motor, to keep power-assisted；
The pedal push rod is in return section, and the controller reversely rotates the assist motor and reduces power-assisted, with to car
Braking be controlled.
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| CN201510209564.0A CN104760587B (en) | 2015-04-28 | 2015-04-28 | Man-machine parallel electric braking booster system and its control method |
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| CN104760587B true CN104760587B (en) | 2017-08-11 |
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| CN108569265B (en) * | 2017-07-03 | 2020-05-29 | 浙江零跑科技有限公司 | Automobile brake simulation system |
Citations (6)
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|---|---|---|---|---|
| CN101817341A (en) * | 2005-06-30 | 2010-09-01 | 株式会社日立制作所 | Electric booster |
| CN102463976A (en) * | 2010-10-29 | 2012-05-23 | 日立汽车系统株式会社 | Electric booster |
| CN103754210A (en) * | 2014-01-08 | 2014-04-30 | 同济大学 | Motor-driven electronic hydraulic braking system |
| CN103950444A (en) * | 2014-04-14 | 2014-07-30 | 同济大学 | Electronic hydraulic brake system capable of reducing liquid outlets of main cylinder |
| CN204196887U (en) * | 2014-10-13 | 2015-03-11 | 陈晶杰 | Full decoupling EHB and corresponding vehicle |
| CN204736845U (en) * | 2015-04-28 | 2015-11-04 | 清华大学 | Man -machine parallel electric brake booster system |
-
2015
- 2015-04-28 CN CN201510209564.0A patent/CN104760587B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101817341A (en) * | 2005-06-30 | 2010-09-01 | 株式会社日立制作所 | Electric booster |
| CN102463976A (en) * | 2010-10-29 | 2012-05-23 | 日立汽车系统株式会社 | Electric booster |
| CN103754210A (en) * | 2014-01-08 | 2014-04-30 | 同济大学 | Motor-driven electronic hydraulic braking system |
| CN103950444A (en) * | 2014-04-14 | 2014-07-30 | 同济大学 | Electronic hydraulic brake system capable of reducing liquid outlets of main cylinder |
| CN204196887U (en) * | 2014-10-13 | 2015-03-11 | 陈晶杰 | Full decoupling EHB and corresponding vehicle |
| CN204736845U (en) * | 2015-04-28 | 2015-11-04 | 清华大学 | Man -machine parallel electric brake booster system |
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