CN108501910A - A kind of vehicle master cylinder constant frequency pressure regulating formula braking anti-lock method - Google Patents
A kind of vehicle master cylinder constant frequency pressure regulating formula braking anti-lock method Download PDFInfo
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- CN108501910A CN108501910A CN201810194557.1A CN201810194557A CN108501910A CN 108501910 A CN108501910 A CN 108501910A CN 201810194557 A CN201810194557 A CN 201810194557A CN 108501910 A CN108501910 A CN 108501910A
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- hydraulic pressure
- constant frequency
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- 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
- B60T8/17—Using electrical or electronic regulation means to control braking
- B60T8/1755—Brake regulation specially adapted to control the stability of the vehicle, e.g. taking into account yaw rate or transverse acceleration in a curve
-
- 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
- B60T13/16—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 pumps directly, i.e. without interposition of accumulators or reservoirs
- B60T13/161—Systems with master cylinder
-
- 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
- B60T13/662—Electrical control in fluid-pressure brake systems characterised by specified functions of the control system components
-
- 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
- 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
- B60T8/17—Using electrical or electronic regulation means to control braking
- B60T8/1755—Brake regulation specially adapted to control the stability of the vehicle, e.g. taking into account yaw rate or transverse acceleration in a curve
- B60T8/17551—Brake regulation specially adapted to control the stability of the vehicle, e.g. taking into account yaw rate or transverse acceleration in a curve determining control parameters related to vehicle stability used in the regulation, e.g. by calculations involving measured or detected parameters
-
- 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)
- Regulating Braking Force (AREA)
Abstract
The present invention relates to a kind of vehicle master cylinder constant frequency pressure regulating formula braking anti-lock methods, include the following steps：1) control master cylinder piston is moved back and forth, and master cylinder hydraulic pressure power is made to realize fluctuation；2) judge whether wheel cylinder needs to be pressurized or be depressured, and open or close the corresponding solenoid valve of the wheel cylinder；3) monitoring vehicle current vehicle speed makes ABS system fail, prevents locking when speed is less than 5m/s in real time.Compared with prior art, the present invention has many advantages, such as to simplify structure, anti-lock effect good.
Description
Technical field
The present invention relates to automobile technical fields, more particularly, to a kind of vehicle master cylinder constant frequency pressure regulating formula braking anti-lock side
Method.
Background technology
New-energy automobile especially electric vehicle popularizes, and braking system has been pushed to be sent out towards brake-by-wire direction
Exhibition, it is not only consistent with the trend that Hyundai Motor develops to modularization, integrated and electromechanical integration, automobile has been also complied with to braking
The new demand of system.
Line control brake system can be divided into two classes, electronic hydraulic brake system (EHB) and electromechanical braking system
(EMB).Wherein, EHB substitutes some mechanical component in Conventional braking systems with electronic component, and still remaining original maturation can
The brake fluid system leaned on ensure that the reliability of braking system；Meanwhile the vehicle power supply of 12V still can be used in EHB systems, it is existing
There is the circuit system of vehicle that can meet the requirements.In addition, EHB systems have, safety, comfortable, response is fast, is easily achieved regeneration system
The advantages that dynamic, brake force accurately controls.And for EHB systems, hydraulic coupling control it is steady, be accurately and fast automobile for
The basic demand of braking system.
The pressure regulator of conventional ABS-system is generally by accumulator, hydraulic pump, solenoid valve (4 pressure charging valves, 4 decompressions
Valve) composition.As a result of integrated type electrical brake fluid system, if continue to use original ESC system from structure function and at
All it is redundancy, waste in sheet.Because being different from Conventional braking systems, EHB can be decoupled with brake pedal completely, to real
It does not influence arbitrarily to control master cylinder pressure under the premise of pedal sense now.It is proposed by the present invention to be based on integrated type electrical hydraulic system
The preferential formula method of vehicle braking anti-lock safety, each wheel only uses a solenoid valve to realize that increase and decrease is pressed, and no pressure charging valve subtracts
Point of pressure valve, does not use hydraulic pump, low pressure accumulator.Although its structure has significantly excellent compared to traditional ABS system
Gesture, but to realize that ABS functions need to redesign control strategy.
Invention content
It is an object of the present invention to overcome the above-mentioned drawbacks of the prior art and provide a kind of fixed frequencies of vehicle master cylinder
Pressure-adjusting type braking anti-lock method.
The purpose of the present invention can be achieved through the following technical solutions：
A kind of vehicle master cylinder constant frequency pressure regulating formula braking anti-lock method, includes the following steps：
1) control master cylinder piston is moved back and forth, and master cylinder hydraulic pressure power is made to realize fluctuation；
2) judge whether wheel cylinder needs to be pressurized or be depressured, and open or close the corresponding solenoid valve of the wheel cylinder；
3) monitoring vehicle current vehicle speed makes ABS system fail, prevents locking when speed is less than 5m/s in real time.
2. a kind of vehicle master cylinder constant frequency pressure regulating formula braking anti-lock method according to claim 1, which is characterized in that
The step 2) specifically includes following steps：
21) two threshold value A are set for the slip rate of each wheel1And A2；
22) when wheel slip is more than threshold value A1When, then the wheel cylinder needs to be depressured；When wheel slip is less than threshold value
A2When, then the wheel cylinder needs to be pressurized；
23) when a certain wheel cylinder needs to be depressured, and when the wheel cylinder hydraulic pressure power is more than master cylinder hydraulic pressure power at this time, then with the wheel cylinder pair
The solenoid valve answered is opened, and is otherwise closed, and when a certain wheel cylinder needs to be pressurized, and the wheel cylinder hydraulic pressure power is less than master cylinder hydraulic pressure power at this time
When, then solenoid valve corresponding with the wheel cylinder is opened, and is otherwise closed.
The master cylinder hydraulic pressure fluctuation range changes with coefficient of road adhesion, and is obtained by Experimental Calibration.
The master cylinder hydraulic pressure fluctuation uses input signal of the sinusoidal signal as motor torque command, with two sines
Input of the Signal averaging as motor torque command controls motor by the period of two sinusoidal signals of adjusting, amplitude, phase value
Different torques are exported, to adjust master cylinder hydraulic pressure power range.
The calculating formula of the slip rate is：
Wherein, λ is slip rate, VxFor car speed, w is angular speed of wheel, and r is radius of wheel.
This method realized by integrated type electrical brake fluid system, the integrated type electrical brake fluid system packet
It includes：
Brake pedal unit：Including brake pedal unit and pedal simulator, to provide rational braking for driver
Pedal sense, and embody the driving intention of driver；
Actively build pressure unit：Including motor, turbine and worm and rack, to convert on rack the rotating torque of motor to
Translation thrust, to push master cylinder to generate corresponding brake fluid pressure；
Brake execution unit：Including master cylinder, wheel cylinder, solenoid valve, fluid reservoir and fluid pressure line, to incite somebody to action actively
The thrust built on pressure unit rack is converted into the hydraulic coupling of each wheel wheel cylinder, and is acted on by the lining pad of braked wheel cylinder end
Corresponding braking moment is generated in brake disc；
Control unit：Including entire car controller, hydraulic pressure force snesor, hydraulic pressure force snesor, pedal displacement sensor, pedal
Force snesor and connection line drive to calculate driver after entire car controller obtains pedal force and pedal travel signal
It is intended to, and generates target braking pressure, and pressure closed loop control is realized by the feedback signal of pressure sensor.
In the integrated type electrical brake fluid system, each wheel only realizes increase and decrease pressure with a solenoid valve.
The solenoid valve is by the PWM high-speed switch electromagnetic valves controlled or to pass through the linear electromagnetic of position feedback control
Valve.
Compared with prior art, the present invention has the following advantages：
One, structure is simplified：Very big change has occurred in the ABS of integrated type electrical brake fluid system on pressure regulator,
Each wheel only realizes increase and decrease pressure with a solenoid valve, without pressure charging valve, point of pressure reducing valve, does not use hydraulic pump, low pressure stores
Energy device, has simplified the structure of braking system, has saved cost.
Two, anti-lock effect is good：In terms of control algolithm, ABS master cylinder constant frequency pressure regulating formula strategies, the control method are devised
Wheel cylinder hydraulic pressure power may be implemented to control and be combined with ESC functions, can realize braking of the vehicle on the attached road surface of height well
Anti-lock function promotes vehicle safety.
Description of the drawings
Fig. 1 is the vehicle braking anti-lock master cylinder constant frequency pressure regulating formula based on integrated type electrical brake fluid system of the present invention
Control logic block diagram.
Fig. 2 is the acquisition methods of master cylinder hydraulic coupling fluctuation range.
Integrated type electrical hydraulic system structure used in the positions Fig. 3.
In figure, 1, electronic control unit, 2, permanent magnet synchronous motor, 3, reduction gearing mechanism, 4, fluid reservoir, 5, normally open solenoid valve,
6, hydraulic pressure force snesor, 7, wheel cylinder, 8, master cylinder, 9, decoupling cylinder, 10, pedal simulator, 11, pedal displacement sensing
Device, 12, brake pedal.
Fig. 4 is master cylinder constant frequency pressure regulating formula strategy schematic diagram.
Fig. 5 is the vehicle response diagram that low attached road surface does not apply the braking anti-lock strategy, wherein figure (5a) is speed
Response diagram, figure (5b) are braking distance response diagram..
Fig. 6 is that low attached road surface applies the control effect that above-mentioned vehicle braking anti-lock master cylinder constant frequency pressure regulating formula strategy obtains
Figure, wherein figure (6a) is main wheel cylinder hydraulic pressure power figure of changing, and figure (6b) is wheel wheel speed figure of changing, and figure (6c) is electricity
Magnet valve is opened and closed situation map, and figure (6d) is braking distance response diagram.
Specific implementation mode
The present invention is described in detail with specific embodiment below in conjunction with the accompanying drawings.
Embodiment
As shown in Figure 1, it is antilock to present embodiments provide a kind of vehicle braking based on integrated type electrical brake fluid system
Dead master cylinder constant frequency pressure regulating formula strategy, control strategy needs master cylinder piston to move back and forth, to make master cylinder hydraulic pressure power continuously repeat liter
High and reduce, when a certain wheel cylinder needs to be depressured, and the wheel cylinder hydraulic pressure power is more than master cylinder hydraulic pressure power at this time, then corresponding with the wheel cylinder
Solenoid valve is opened, and is otherwise closed.Similarly, when a certain wheel cylinder needs to be pressurized, and the wheel cylinder hydraulic pressure power is less than master cylinder hydraulic pressure power at this time,
Then solenoid valve corresponding with the wheel cylinder is opened, and is otherwise closed.
When vehicle braking, if the travel speed of vehicle is higher than the wheel linear velocity of each wheel, between tire and road surface
Sliding will be generated, the degree of sliding is indicated with slip rate.
In formula：λ --- slip rate；
Vx--- car speed；
W --- angular speed of wheel；
R --- radius of wheel.
For the slip rate of each wheel, two threshold value A are set1And A2, when wheel slip is more than threshold value A1When show
The wheel cylinder needs to be depressured；When wheel slip is less than threshold value A2When show that the wheel cylinder needs to be pressurized.Car speed is monitored simultaneously,
When speed is less than 5m/s, no matter the value of slip rate is how many, ABS system fails.
As shown in Fig. 2, the master cylinder hydraulic pressure fluctuation range is in different attachment coefficient road surfaces difference, fluctuation range is by trying
Standard inspection obtains surely.Master cylinder hydraulic pressure fluctuation is using sinusoidal signal as the input signal of motor torque command, with two sinusoidal letters
Number input of the superposition as motor torque command, it is defeated by adjusting periods of two sinusoidal signals, amplitude, phase value control motor
Go out different torques, to preferably adjust master cylinder hydraulic pressure power range.
As shown in figure 3, the integrated type electrical brake fluid system includes：
Brake pedal unit, including brake pedal unit, pedal simulator etc..Its effect is provided reasonably for driver
Brake pedal feel, while embodying the driving intention of driver.
Actively build pressure unit, including motor, turbine and worm, rack etc..Its effect is to convert the rotating torque of motor to
Translation thrust on rack, to push master cylinder to generate corresponding brake fluid pressure.
Brake execution unit, including master cylinder, wheel cylinder, solenoid valve, fluid reservoir, fluid pressure line etc..Its effect is
It is responsible for converting the thrust actively built on pressure unit rack to each wheel wheel cylinder hydraulic pressure power, is served as a contrast finally by the friction of braked wheel cylinder end
Block effect generates corresponding braking moment on the disc brake rotor.
Control unit, including entire car controller, hydraulic pressure force snesor, hydraulic pressure force snesor, pedal displacement sensor, pedal
Force snesor and relevant circuit.It is to calculate driver after entire car controller obtains pedal force and pedal travel signal that it, which is acted on,
Driving intention obtains target braking pressure, and is realized by the feedback signal of pressure sensor after coordinating with vehicle other systems
Pressure closed loop controls.
The integrated type electrical brake fluid system has occurred compared with conventional ABS-system structure on pressure regulator
Very big change, each wheel only realize increase and decrease pressure with a solenoid valve, without pressure charging valve, point of pressure reducing valve, do not use hydraulic pressure
Pump, low pressure accumulator.
The solenoid valve is by the PWM high-speed switch electromagnetic valves controlled or to pass through the linear electromagnetic of position feedback control
Valve.
It is more convenient for understanding the operation principle of master cylinder constant frequency pressure regulating formula in conjunction with Fig. 4.Fine line sinusoidal signal is master cylinder hydraulic coupling
Signal is constantly shaken with a certain frequency and amplitude, and four rough solid lines indicate the actual wheel cylinder of four wheel cylinders respectively
Hydraulic coupling.By taking the near front wheel as an example, judge that the wheel needs after depressurizing according to the current wheel slip, when master cylinder hydraulic pressure force value
(i.e. fine line) is less than the wheel cylinder actual hydraulic pressure force value (i.e. thick chain-dotted line), and corresponding solenoid valve is opened, if master cylinder hydraulic pressure force value
Not less than the wheel cylinder actual hydraulic pressure force value, then solenoid valve closing is corresponded to.Remaining wheel is also in compliance with same reason.
In order to verify the preferential formula strategy validity of vehicle braking anti-lock safety of proposition, based on the hardware in loop built
Test-bed carries out retardation test on high and low attached road surface respectively.Low attached coefficient of road adhesion is 0.2, initial speed 60km/
h.Fig. 5 is the vehicle speed wheel speed and braking distance situation for not applying vehicle braking anti-lock master cylinder constant frequency pressure regulating formula strategy, by
Figure is it is found that when low attached road surface is without control, and four wheel wheel speeds are reduced to rapidly zero, and slip rate becomes 1, i.e. four wheels occur
Locking.When Fig. 6 show ABS master cylinder constant frequency pressure regulating formula strategy actives, corresponding master cylinder wheel cylinder hydraulic pressure power situation of change, vehicle wheel
Fast situation of change, four solenoid valves opening and closing situations and braking distance at this time.Under low attached road surface, ABS master cylinder constant frequency pressure regulating formulas
Strategy realizes anti-lock function, and the slip rate of four wheels is shaken near optimal slip rate in braking process, braking away from
From for 66.47m, reduced when than without control.Wheelslip is restrained effectively, reduces braking distance, ensures the peace of vehicle
Total stability.
Claims (8)
1. a kind of vehicle master cylinder constant frequency pressure regulating formula braking anti-lock method, which is characterized in that include the following steps：
1) control master cylinder piston is moved back and forth, and master cylinder hydraulic pressure power is made to realize fluctuation；
2) judge whether wheel cylinder needs to be pressurized or be depressured, and open or close the corresponding solenoid valve of the wheel cylinder；
3) monitoring vehicle current vehicle speed makes ABS system fail, prevents locking when speed is less than 5m/s in real time.
2. a kind of vehicle master cylinder constant frequency pressure regulating formula braking anti-lock method according to claim 1, which is characterized in that described
Step 2) specifically include following steps：
21) two threshold value A are set for the slip rate of each wheel1And A2；
22) when wheel slip is more than threshold value A1When, then the wheel cylinder needs to be depressured；When wheel slip is less than threshold value A2When,
Then the wheel cylinder needs to be pressurized；
23) when a certain wheel cylinder needs to be depressured, and the wheel cylinder hydraulic pressure power is more than master cylinder hydraulic pressure power at this time, then corresponding with the wheel cylinder
Solenoid valve is opened, and is otherwise closed, when a certain wheel cylinder needs to be pressurized, and the wheel cylinder hydraulic pressure power is less than master cylinder hydraulic pressure power at this time, then
Solenoid valve corresponding with the wheel cylinder is opened, and is otherwise closed.
3. a kind of vehicle master cylinder constant frequency pressure regulating formula braking anti-lock method according to claim 1, which is characterized in that described
Master cylinder hydraulic pressure fluctuation range change with coefficient of road adhesion, and obtained by Experimental Calibration.
4. a kind of vehicle master cylinder constant frequency pressure regulating formula braking anti-lock method according to claim 1, which is characterized in that described
Master cylinder hydraulic pressure fluctuation use input signal of the sinusoidal signal as motor torque command, use two sinusoidal signals be superimposed as
The input of motor torque command controls different turns of motor output by the period of two sinusoidal signals of adjusting, amplitude, phase value
Square, to adjust master cylinder hydraulic pressure power range.
5. a kind of vehicle master cylinder constant frequency pressure regulating formula braking anti-lock method according to claim 1, which is characterized in that described
The calculating formula of slip rate be：
Wherein, λ is slip rate, VxFor car speed, w is angular speed of wheel, and r is radius of wheel.
6. according to a kind of vehicle master cylinder constant frequency pressure regulating formula braking anti-lock method of claim 1-5 any one of them, feature
It is, this method is realized by integrated type electrical brake fluid system, and the integrated type electrical brake fluid system includes：
Brake pedal unit：Including brake pedal unit and pedal simulator, to provide rational brake pedal for driver
Feel, and embodies the driving intention of driver；
Actively build pressure unit：It is flat on rack to convert the rotating torque of motor to including motor, turbine and worm and rack
Dynamicthrust, to push master cylinder to generate corresponding brake fluid pressure；
Brake execution unit：Including master cylinder, wheel cylinder, solenoid valve, fluid reservoir and fluid pressure line, will actively build pressure
Thrust on unit rack is converted into the hydraulic coupling of each wheel wheel cylinder, and acts on braking by the lining pad of braked wheel cylinder end
Corresponding braking moment is generated on disk；
Control unit：It is passed including entire car controller, hydraulic pressure force snesor, hydraulic pressure force snesor, pedal displacement sensor, pedal force
Sensor and connection line drive meaning to calculate driver after entire car controller obtains pedal force and pedal travel signal
Figure, and target braking pressure is generated, and pressure closed loop control is realized by the feedback signal of pressure sensor.
7. a kind of vehicle master cylinder constant frequency pressure regulating formula braking anti-lock method according to claim 6, which is characterized in that described
Integrated type electrical brake fluid system in, each wheel only realizes increase and decrease pressure with solenoid valve.
8. a kind of vehicle master cylinder constant frequency pressure regulating formula braking anti-lock method according to claim 6, which is characterized in that described
Solenoid valve be by the PWM high-speed switch electromagnetic valves controlled or to pass through the linear solenoid valve of position feedback control.
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| CN201810194557.1A CN108501910A (en) | 2018-03-09 | 2018-03-09 | A kind of vehicle master cylinder constant frequency pressure regulating formula braking anti-lock method |
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| CN201810194557.1A CN108501910A (en) | 2018-03-09 | 2018-03-09 | A kind of vehicle master cylinder constant frequency pressure regulating formula braking anti-lock method |
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Cited By (8)
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| CN109910851A (en) * | 2019-02-19 | 2019-06-21 | 同济大学 | Slip rate and the united anti-lock control method of acceleration and system based on IEHB |
| CN110132611A (en) * | 2019-05-23 | 2019-08-16 | 天津清智科技有限公司 | Vehicle braking testboard bay |
| CN111348025A (en) * | 2019-04-26 | 2020-06-30 | 京西重工（上海）有限公司 | Electro-hydraulic brake system and method for preventing wheel slip of vehicle using the same |
| CN112141079A (en) * | 2020-10-26 | 2020-12-29 | 东风汽车集团有限公司 | Hydraulic control method and storage medium for follow-up brake stopping |
| CN112721895A (en) * | 2021-01-26 | 2021-04-30 | 同济大学 | IEHB system master cylinder hydraulic pressure estimation method based on novel friction model |
| CN113460009A (en) * | 2021-07-28 | 2021-10-01 | 中国第一汽车股份有限公司 | Integrated brake system fluid infusion control method and vehicle |
| CN114643968A (en) * | 2022-03-31 | 2022-06-21 | 上汽通用五菱汽车股份有限公司 | Method and device for protecting leakage of vehicle brake pipeline |
| CN115366855A (en) * | 2022-09-22 | 2022-11-22 | 浙江吉利控股集团有限公司 | Control method and device of anti-lock brake system and electronic equipment |
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Application publication date: 20180907 |