CN109159777A - A kind of accurate regulating system of brake fluid pressure meeting wheel cylinder boost demand - Google Patents
A kind of accurate regulating system of brake fluid pressure meeting wheel cylinder boost demand Download PDFInfo
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- CN109159777A CN109159777A CN201811134165.2A CN201811134165A CN109159777A CN 109159777 A CN109159777 A CN 109159777A CN 201811134165 A CN201811134165 A CN 201811134165A CN 109159777 A CN109159777 A CN 109159777A
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- 239000012530 fluid Substances 0.000 title claims abstract description 88
- 230000001105 regulatory effect Effects 0.000 title claims abstract description 23
- 230000008878 coupling Effects 0.000 claims abstract description 13
- 238000010168 coupling process Methods 0.000 claims abstract description 13
- 238000005859 coupling reaction Methods 0.000 claims abstract description 13
- 238000001514 detection method Methods 0.000 claims abstract description 9
- 230000007246 mechanism Effects 0.000 claims description 25
- 230000006837 decompression Effects 0.000 claims description 14
- 230000005611 electricity Effects 0.000 claims 1
- 230000007423 decrease Effects 0.000 description 7
- 238000000034 method Methods 0.000 description 6
- 238000006073 displacement reaction Methods 0.000 description 4
- 230000018109 developmental process Effects 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 239000003638 chemical reducing agent Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 230000033772 system development Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
- B60T13/74—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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- Engineering & Computer Science (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Regulating Braking Force (AREA)
Abstract
The present invention relates to the accurate regulating systems of brake fluid pressure that kind meets wheel cylinder boost demand, the system includes electronic control unit and the brake fluid potential source being attached thereto respectively, brake fluid pressure unit, additional mechanical supercharging source, additional mechanical supercharging unit and hydraulic coupling detection unit, hydraulic coupling detection unit connects front-wheel wheel cylinder and rear-wheel wheel cylinder, four tunnels are arranged in brake fluid pressure unit, and front-wheel wheel cylinder and rear-wheel wheel cylinder are connect with brake fluid potential source respectively, two-way or four tunnels are arranged in additional mechanical supercharging unit, when two-way is arranged, front-wheel wheel cylinder or rear-wheel wheel cylinder are connect by additional mechanical supercharging unit with additional mechanical supercharging source, when four tunnels is arranged, front-wheel wheel cylinder and rear-wheel wheel cylinder are connect by additional mechanical supercharging unit with additional mechanical supercharging source；When needing to depressurize, the movement of brake fluid pressure unit is depressurized, and when needing to be pressurized, the movement of brake fluid pressure unit is pressurized, while the movement of additional mechanical supercharging unit carries out additional mechanical supercharging.Compared with prior art, the present invention has two sets of booster bodies, and stability, the safety is improved.
Description
Technical field
The present invention relates to a kind of Automobile brake control systems, more particularly, to a kind of brake fluid for meeting wheel cylinder boost demand
The accurate regulating system of pressure.
Background technique
Braking system is the vital system in relation to vehicle safety performance, and the height of performance will directly affect vehicle
Driving safety performance.Traditional braking system, usually by brake pedal, vacuum booster, master cylinder, ESC/ABS, braking
Wheel cylinder and its corresponding pipeline are formed.Whole system is more complicated, and in bad in volume, quality and integrated level
Gesture.Also, with the continuous promotion of engine efficiency, the vacuum degree that can be provided to vacuum booster is just more and more limited.
In order to make up this problem brought by high efficience motor, many vehicles take the scheme of addition of vacuum pump to increase vacuum degree.
However, this program is an interim solution.Increased vacuum pump not only occupies limited vehicle fore cabin space,
The quality and failure risk of braking system are also increased simultaneously.This runs in the opposite direction for vehicle and lightweight and safety.
Therefore, response is fast, powerful electronic hydraulic brake system just more and more attention has been paid to.
On the other hand, in the 1980s, it is with the development of automotive electronic technology and mature, anti-blocking brake system ABS
(Anti-lock Brake System) is able to invent and starts to promote the use of.The mid-80, BOSCH company are proposed drive again
Dynamic antiskid system ASR (Anti-Skidding Restraint).The mid-90, BOSCH company and Mercedes-Benz are public
Department combines the revolutionary character technology-electronic stability program ESP again being proposed on automotive safety.Either ABS, ASR be still
ESP, the control function of active safety are achieved by being integrated in brake fluid system.With electric-control system
Increase and automobile chassis is towards integrated trend development, conventional hydraulic braking system is limited to its own hardware configuration, can not
Meet the needs of braking system development, and constrains further increasing for its braking ability.
The line control brake system formed in conjunction with wire control technology and brake system of car has better meet Hyundai Motor pair
The new demand of braking system development, will gradually replace existing brake fluid system, become the development of future automobile braking system
Trend.Line control brake system can be subdivided into two types, i.e. electronic hydraulic brake system (Electro-Hydraulic Brake
System, abbreviation EHB) and electromechanical braking system (Electro-Mechanical Brake System, abbreviation EMB).Its
Middle EMB system is with electronic mechanical system completely instead of hydraulic system (master cylinder, vacuum servo in existing braking system
Device, fluid pressure line etc.), it is considered to be the principal mode of the following braking system, but there is still a need for solve safety, reliability, fault-tolerant
Many critical issues such as property, anti-interference.And EHB system belongs to the excessive product of Conventional braking systems Yu EMB system, it will be passed
Some mechanical component in system brake fluid system is replaced with electronic component, still remains original quite mature hydraulic braking
System ensure that the reliability of braking system, while vehicle-mounted 12V power supply still can be used in EHB system, without to current automobile circuit
It is changed on a large scale.EHB system have many advantages, such as high reliablity, response be fast, hydraulic pressure can accuracy controlling, and can be by control
Algorithm processed realizes active safety control function, such as ABS, ESP, TCS.Just because of this, the major auto parts and components production in the world
Quotient is still researching and developing novel electronic hydraulic brake system energetically and is introducing to the market.
Current electronic brake fluid system solution is numerous, but it is substantially divided into three according to the type of power supply device
Kind: it is respectively energy supply element with vacuum pump-vacuum booster, take motor-pump-high pressure accumulator as energy supply element and with motor-
Deceleration mechanism is energy supply element.Currently, vacuum pump-vacuum booster is to energize element and using motor-pump-high pressure accumulator as confession
Can the electronic hydraulic brake system of element have a more application, motor-speed reducer structure be energize element mechanism it is dynamic using with
And control method is still immature.
Summary of the invention
Meet wheel cylinder pressurization it is an object of the present invention to overcome the above-mentioned drawbacks of the prior art and provide a kind of
The accurate regulating system of the brake fluid pressure of demand.
The purpose of the present invention can be achieved through the following technical solutions:
A kind of accurate regulating system of brake fluid pressure meeting wheel cylinder boost demand is used for two front-wheel wheel cylinders of vehicle and two
The brake fluid pressure of a rear-wheel wheel cylinder is adjusted, which includes electronic control unit and the brake fluid pressure being attached thereto respectively
Source, brake fluid pressure unit, additional mechanical supercharging source, additional mechanical supercharging unit and hydraulic coupling detection unit, the hydraulic coupling detect single
Four tunnels, quadruple diversity system hydrodynamic forces unit difference is arranged in member connection front-wheel wheel cylinder and rear-wheel wheel cylinder, the brake fluid pressure unit
Front-wheel wheel cylinder and rear-wheel wheel cylinder are connect with brake fluid potential source, the described additional mechanical supercharging unit setting two-way or four tunnels, when setting
When setting two-way, two front-wheel wheel cylinders or two rear-wheel wheel cylinders are connect by two-way additional mechanical supercharging unit with additional mechanical supercharging source, work as setting
When four tunnels, front-wheel wheel cylinder and rear-wheel wheel cylinder are connect by four road additional mechanical supercharging units with additional mechanical supercharging source respectively；
When vehicle braking, when front-wheel wheel cylinder or rear-wheel wheel cylinder need to depressurize, corresponding brake fluid pressure unit movement is controlled
It is depressurized, when front-wheel wheel cylinder or rear-wheel wheel cylinder need to be pressurized, controls corresponding brake fluid pressure unit movement and be pressurized, together
When control the movement of corresponding additional mechanical supercharging unit and carry out additional mechanical supercharging.
The brake fluid potential source includes first motor, deceleration mechanism, the first fluid reservoir and master cylinder, and described first
Motor via reducer structure connects master cylinder input terminal, and master cylinder output end connects front-wheel wheel by brake fluid pressure unit
Cylinder and rear-wheel wheel cylinder, the master cylinder connect the first fluid reservoir.
The brake fluid pressure unit includes brake fluid pressure branch, is equipped with and is used in the brake fluid pressure branch
It is switched on or switched off the first solenoid valve of the branch.
First solenoid valve is normally open solenoid valve.
The additional mechanical supercharging source includes the second motor, the second fluid reservoir and booster pump, and second motor, which connects, to be increased
Press pump input terminal, pressurization pump output terminal connect front-wheel wheel cylinder or rear-wheel wheel cylinder by additional mechanical supercharging unit or connect front-wheel wheel simultaneously
Cylinder and rear-wheel wheel cylinder, the booster pump connect the second fluid reservoir.
The additional mechanical supercharging unit includes additional mechanical supercharging branch, in the additional mechanical supercharging branch be equipped with for connect or
Disconnect the second solenoid valve of the branch.
The second solenoid valve is normally open solenoid valve.
The hydraulic coupling detection unit includes the liquid being correspondingly connected with respectively with two front-wheel wheel cylinders and two rear-wheel wheel cylinders
Pressure sensor, the hydraulic force snesor are connected to electronic control unit.
Compared with prior art, the present invention has the advantage that
(1) present invention setting brake fluid potential source and brake fluid pressure unit form increase and decrease press mechanism, can carry out vehicle braking
When pressurization and decompression, additional mechanical supercharging source and additional mechanical supercharging unit are set and form additional mechanical supercharging mechanism, when realizing vehicle braking
Additional mechanical supercharging particularly with the pressurization in braking process, increases and decreases press mechanism and auxiliary to realize accurate control to pressure of wheel braking cylinder
Booster body shared is helped to be pressurized work, when wherein a set of failure mechanisms with function of increasing pressure, the another set of normal work of energy
Make, guarantees the reliability of pressurization, further improve the stability and safety of system；
(2) present system is simple for structure, is able to achieve the accurate control to pressure of wheel braking cylinder, is able to satisfy vehicle ABS, ESP etc.
Functional requirement adapts to current vehicle lightweight, integrated trend.
Detailed description of the invention
Fig. 1 is the structural representation for the accurate regulating system of brake fluid pressure that the embodiment of the present invention 1 meets wheel cylinder boost demand
Figure；
Fig. 2 is the structural representation for the accurate regulating system of brake fluid pressure that the embodiment of the present invention 2 meets wheel cylinder boost demand
Figure；
Fig. 3 is the structural representation for the accurate regulating system of brake fluid pressure that the embodiment of the present invention 3 meets wheel cylinder boost demand
Figure.
In figure, 1 is brake pedal, and 2 be first motor, and 3 be deceleration mechanism, and 4 be master cylinder, and 5 be the first fluid reservoir, 6
For booster pump, 7,8,9,10,11,12,20,21 be normally open solenoid valve, and 13 be displacement sensor, and 14 be electronic control unit, 15
It is the near front wheel wheel cylinder for hydraulic force snesor, 16,17 be off-front wheel wheel cylinder, and 18 be left rear wheel wheel cylinder, and 19 be off hind wheel wheel cylinder.
Specific embodiment
The present invention is described in detail with specific embodiment below in conjunction with the accompanying drawings.Note that the following embodiments and the accompanying drawings is said
Bright is substantial illustration, and the present invention is not intended to be applicable in it object or its purposes is defined, and the present invention does not limit
In the following embodiments and the accompanying drawings.
Embodiment 1
As shown in Figure 1, a kind of accurate regulating system of brake fluid pressure for meeting wheel cylinder boost demand, for before two, vehicle
The brake fluid pressure for taking turns wheel cylinder and two rear-wheel wheel cylinders is adjusted, which includes electronic control unit 14 and be attached thereto respectively
Brake fluid potential source, brake fluid pressure unit, additional mechanical supercharging source, additional mechanical supercharging unit and hydraulic coupling detection unit, hydraulic coupling inspection
Unit connection front-wheel wheel cylinder and rear-wheel wheel cylinder are surveyed, four tunnels are arranged in brake fluid pressure unit, and quadruple diversity system hydrodynamic forces unit respectively will
Front-wheel wheel cylinder and rear-wheel wheel cylinder are connect with brake fluid potential source, and two-way or four tunnels are arranged in additional mechanical supercharging unit, when two-way is arranged,
Two front-wheel wheel cylinders or two rear-wheel wheel cylinders are connect by two-way additional mechanical supercharging unit with additional mechanical supercharging source, when four tunnels is arranged, four
Front-wheel wheel cylinder and rear-wheel wheel cylinder are connect by road additional mechanical supercharging unit with additional mechanical supercharging source respectively, in the present embodiment, additional mechanical supercharging list
Member setting two-way is simultaneously separately connected two front-wheel wheel cylinders, i.e. the near front wheel wheel cylinder 16 and off-front wheel wheel cylinder 17；
When vehicle braking, driver controls brake pedal 1, to pass through displacement sensor 13 for the displacement of brake pedal 1
It is transmitted to electronic control unit 14, electronics acquiring unit obtains braking intention, when front-wheel wheel cylinder or rear-wheel wheel cylinder need to depressurize,
It controls the movement of corresponding brake fluid pressure unit to be depressurized, when front-wheel wheel cylinder or rear-wheel wheel cylinder need to be pressurized, control corresponding
The movement of brake fluid pressure unit is pressurized, while being controlled corresponding additional mechanical supercharging unit movement and being carried out additional mechanical supercharging.
Hydraulic coupling detection unit includes that the hydraulic coupling being correspondingly connected with respectively with two front-wheel wheel cylinders and two rear-wheel wheel cylinders passes
Sensor 15, hydraulic force snesor 15 are connected to electronic control unit 14.It is detected when vehicle braking by hydraulic force snesor 15
Front-wheel wheel cylinder and rear-wheel wheel cylinder hydraulic coupling size as value of feedback, to realize the adjusting of each wheel cylinder hydraulic pressure power.
Brake fluid potential source includes first motor 2, deceleration mechanism 3, the first fluid reservoir 5 and master cylinder 4, and first motor 2 is logical
It crosses deceleration mechanism 3 and connects 4 input terminal of master cylinder, 4 output end of master cylinder connects front-wheel wheel cylinder by brake fluid pressure unit
With rear-wheel wheel cylinder, master cylinder 4 connects the first fluid reservoir 5.Brake fluid pressure unit includes brake fluid pressure branch, brake fluid pressure
The first solenoid valve for being switched on or switched off the branch is equipped in power branch, the first solenoid valve is normally open solenoid valve.
Additional mechanical supercharging source includes the second motor, the second fluid reservoir and booster pump 6, and the second motor connects 6 input terminal of booster pump,
6 output end of booster pump connects front-wheel wheel cylinder or rear-wheel wheel cylinder by additional mechanical supercharging unit or connects front-wheel wheel cylinder and rear wheel rotation simultaneously
Cylinder, booster pump 6 connect the second fluid reservoir.Additional mechanical supercharging unit includes additional mechanical supercharging branch, is equipped with and is used in additional mechanical supercharging branch
It is switched on or switched off the second solenoid valve of the branch, second solenoid valve is normally open solenoid valve, the first fluid reservoir 5 and in the present embodiment
Two fluid reservoirs share one.
The present embodiment meets the concrete operating principle of the accurate regulating system of brake fluid pressure of wheel cylinder boost demand are as follows:
(1) conventional brake operating condition
After electronic control unit 14 obtains conventional brake instruction, normally open solenoid valve 7,12 is in off-position, rear wheel rotation
Cylinder is connected to master cylinder 4.Normally open solenoid valve 10 and 11 is powered, and front-wheel wheel cylinder and master cylinder 4 disconnect.Normally open valve electromagnetism 8 and 9
Power-off is opened, and front-wheel wheel cylinder is connected to booster pump 6.It is instructed according to severity of braking, 2 drive deceleration mechanism of first motor, 3 straight line pushes away
Dynamic master cylinder 4 carries out blower operations to rear-wheel wheel cylinder, and using at rear-wheel wheel cylinder hydraulic 15 signal of force snesor as feedback quantity,
Realization is precisely controlled rear-wheel pressure of wheel braking cylinder.Meanwhile second motor driven booster pump 6 work, front-wheel wheel cylinder is pressurized
Operation, it is same as mentioned above to obtain target wheel cylinder pressure.Wherein specific rate of pressurization can control high speed by the methods of PWM
Solenoid valve is realized.After reaching goal pressure, normally open solenoid valve 7,8,9,10,11 and 12, which is powered, is closed, each front-wheel wheel cylinder and rear-wheel
Wheel cylinder keeps pressure.
(2) individually operating condition is pressed in wheel cylinder increase and decrease
In order to realize the functions such as ABS, ESC, need to control single wheel cylinder.When different pressurization targets occurs in wheel cylinder
When value, the operating pressure of booster pump 6 and master cylinder 4 depends on it to answerable highest pressure of wheel braking cylinder target value, as long as
When pressure of wheel braking cylinder reaches target value, it is powered and is closed corresponding normally open solenoid valve, make its pressure maintaining；When four wheel cylinders increase simultaneously
When pressing decompression demand, before the pressurization of the connected rear-wheel wheel cylinder of master cylinder 4, first judge whether other 3 wheel cylinders need to depressurize, at it
It is operated again after the completion of his all wheel cylinder decompressions, the pressurization of 6 chord road wheel cylinders of booster pump depressurizes demand not by other wheel cylinders
It influences, and can be carried out simultaneously with other wheel cylinders, for the connection type shown in Fig. 1, this situation is described in detail:
A. front-wheel
By taking left front wheel cylinder as an example, when it needs to be pressurized, normally open solenoid valve 10 is closed, the near front wheel wheel cylinder 16 and master cylinder
4 disconnect, and normally open solenoid valve 8, which is powered, to be opened, and connect with booster pump 6, while the second motor driven booster pump 6 carries out blower operations,
After reaching target pressure value, normally open solenoid valve 8, which is powered, is closed, and the near front wheel wheel cylinder 16 is in state of pressure keeping；When decompression, first motor
2 traction braking master cylinders 4 retract, and decline 4 pressure of master cylinder, and the near front wheel wheel cylinder 16 and braking are connected in the power-off of normally open solenoid valve 10
Master cylinder 4,16 pressure release of the near front wheel wheel cylinder, after reaching target value, normally open solenoid valve 10 is closed, it is made to keep pressure.
B. rear-wheel
By taking left rear wheel as an example, when it has boost demand, first determine whether remaining 3 wheel cylinder is depressurizing or having decompression
Demand, if so, decompression operation is waited to complete；After the completion, first motor 2 drives master cylinder 4 after 3 torque increase of deceleration mechanism, often
Open electromagnetic valve 12 is opened, and the near front wheel pressure increase is made, and after reaching target pressure value, normally open solenoid valve 12, which is powered, is closed, left rear wheel
18 pressure maintaining of wheel cylinder.When decompression, 2 traction braking master cylinder 4 of first motor retracts, and normally open solenoid valve 12 is opened, and left rear wheel wheel cylinder 18 is let out
Pressure, after reaching target value, normally open solenoid valve 12 is closed, and keeps pressure.
(3) fail operating condition
When failure, it is divided into partial failure and all failure.When first motor 2 and deceleration mechanism 3 or booster pump 6 wherein one
When a failure, another covering device can keep work, and auxiliary driver carries out conventional brake blower operations, and the course of work can
With reference to above-mentioned operating condition.When driving repertoire module in system or crucial solenoid valve breaks down, whole normally open solenoid valve power-off,
It remains turned on, brake pedal 1 and master cylinder 4 are mechanically connected, and only step on brake pedal 1 by driving and master cylinder 4 is pushed to build
Pressure completes braking.
Embodiment 2
As shown in Fig. 2, meeting the accurate regulating system additional mechanical supercharging of brake fluid pressure of wheel cylinder boost demand in the present embodiment
Unit setting two-way is simultaneously separately connected two rear-wheel wheel cylinders, i.e. left rear wheel wheel cylinder 18 and off hind wheel wheel cylinder 19, other with implementation
Example 1 is identical.
Meet the concrete operating principle of the accurate regulating system of brake fluid pressure of wheel cylinder boost demand in the embodiment are as follows:
(1) conventional brake operating condition
After electronic control unit 14 obtains conventional brake instruction, normally open solenoid valve 10 and 11 is in off-position, front-wheel
Wheel cylinder is connected to master cylinder 4.Normally open solenoid valve 7 and 12 is powered, and rear-wheel wheel cylinder and master cylinder 4 disconnect.8 He of normally open valve electromagnetism
9 power-off are opened, and rear-wheel wheel cylinder is connected to booster pump 6.It is instructed according to severity of braking, 2 drive deceleration mechanism of first motor, 3 straight line pushes away
Dynamic master cylinder 4 carries out blower operations to front-wheel wheel cylinder, and using at front-wheel wheel cylinder hydraulic 15 signal of force snesor as feedback quantity,
Realization is precisely controlled front-wheel pressure of wheel braking cylinder.Meanwhile second motor driven booster pump 6 work, rear-wheel wheel cylinder is pressurized
Operation, it is same as mentioned above to obtain target wheel cylinder pressure.Wherein specific rate of pressurization can control high speed by the methods of PWM
Solenoid valve is realized.After reaching goal pressure, normally open solenoid valve 7,8,9,10,11 and 12, which is powered, is closed, each front-wheel wheel cylinder and rear-wheel
Wheel cylinder keeps pressure.
(2) individually operating condition is pressed in wheel cylinder increase and decrease
In order to realize the functions such as ABS, ESC, need to control single wheel cylinder.When different pressurization targets occurs in wheel cylinder
When value, the operating pressure of booster pump 6 and master cylinder 4 depends on it to answerable highest pressure of wheel braking cylinder target value, as long as
When pressure of wheel braking cylinder reaches target value, it is powered and is closed corresponding normally open solenoid valve, make its pressure maintaining；When four wheel cylinders increase simultaneously
When pressing decompression demand, before the pressurization of the connected rear-wheel wheel cylinder of master cylinder 4, first judge whether other 3 wheel cylinders need to depressurize, at it
It is operated again after the completion of his all wheel cylinder decompressions, the pressurization of 6 chord road wheel cylinders of booster pump depressurizes demand not by other wheel cylinders
It influences, and can be carried out simultaneously with other wheel cylinders, for the connection type shown in Fig. 2, this situation is described in detail:
A. front-wheel
By taking left front wheel cylinder as an example, when it needs to be pressurized, first determine whether remaining 3 wheel cylinder is depressurizing or having decompression
Demand, if so, decompression operation is waited to complete；After the completion, first motor 2 drives master cylinder 4 after 3 torque increase of deceleration mechanism, often
Open electromagnetic valve 10 is opened, and the near front wheel pressure increase is made, and after reaching target pressure value, normally open solenoid valve 10, which is powered, is closed, the near front wheel
16 pressure maintaining of wheel cylinder.When decompression, 2 traction braking master cylinder 4 of first motor retracts, and normally open solenoid valve 10 is opened, and the near front wheel wheel cylinder 16 is let out
Pressure, after reaching target value, normally open solenoid valve 10 is closed, and keeps pressure.
B. rear-wheel
By taking left rear wheel as an example, when it has boost demand, the closing of normally open solenoid valve 12, left rear wheel wheel cylinder 18 and master cylinder
4 disconnect, and normally open solenoid valve 8, which is powered, to be opened, and connect with booster pump 6, while the second motor driven booster pump 6 carries out blower operations,
After reaching target pressure value, normally open solenoid valve 8, which is powered, is closed, and left rear wheel wheel cylinder 18 is in state of pressure keeping；When decompression, first motor
2 traction braking master cylinders 4 retract, and decline 4 pressure of master cylinder, and left rear wheel wheel cylinder 18 and braking are connected in the power-off of normally open solenoid valve 12
Master cylinder 4,18 pressure release of left rear wheel wheel cylinder, after reaching target value, normally open solenoid valve 12 is closed, it is made to keep pressure.
(3) fail operating condition
When failure, it is divided into partial failure and all failure.When first motor 2 and deceleration mechanism 3 or booster pump 6 wherein one
When a failure, another covering device can keep work, and auxiliary driver carries out conventional brake blower operations, and the course of work can
With reference to above-mentioned operating condition.When driving repertoire module in system or crucial solenoid valve breaks down, whole normally open solenoid valve power-off,
It remains turned on, brake pedal 1 and master cylinder 4 are mechanically connected, and only step on brake pedal 1 by driving and master cylinder 4 is pushed to build
Pressure completes braking.
Embodiment 3
As shown in figure 3, meeting the accurate regulating system additional mechanical supercharging of brake fluid pressure of wheel cylinder boost demand in the present embodiment
Four tunnels are arranged in unit, and front-wheel wheel cylinder and rear-wheel wheel cylinder are connect by four road additional mechanical supercharging units with additional mechanical supercharging source respectively, remaining is
It is identical with embodiment 1.
Meet in the embodiment the accurate regulating system of brake fluid pressure of wheel cylinder boost demand concrete operating principle be with
Embodiment 1 is similar with embodiment 2, a set of for braking since front-wheel wheel cylinder and rear-wheel wheel cylinder are respectively provided with two sets of mechanisms being pressurized
The increase and decrease press mechanism of hydraulic power source and brake fluid pressure unit composition, another set of is auxiliary pressurized source and additional mechanical supercharging unit composition
Additional mechanical supercharging mechanism, in control process, when front-wheel wheel cylinder is pressurized by increasing and decreasing press mechanism, rear-wheel wheel cylinder then passes through auxiliary
Booster body is helped to be pressurized, when front-wheel wheel cylinder is pressurized by additional mechanical supercharging mechanism, rear-wheel wheel cylinder, which then passes through, to be increased
Mechanism of decompressor pressurization improves the reliability of system so that two sets of mechanisms with function of increasing pressure can share function of increasing pressure.
Above embodiment is only to enumerate, and does not indicate limiting the scope of the invention.These embodiments can also be with other
Various modes are implemented, and can make in the range of not departing from technical thought of the invention it is various omit, displacement, change.
Claims (8)
1. a kind of accurate regulating system of brake fluid pressure for meeting wheel cylinder boost demand is used for two front-wheel wheel cylinders of vehicle and two
The brake fluid pressure of rear-wheel wheel cylinder is adjusted, which is characterized in that the system includes electronic control unit and is attached thereto respectively
Brake fluid potential source, brake fluid pressure unit, additional mechanical supercharging source, additional mechanical supercharging unit and hydraulic coupling detection unit, described is hydraulic
Power detection unit connects front-wheel wheel cylinder and rear-wheel wheel cylinder, and four tunnels, quadruple diversity system hydrodynamic forces are arranged in the brake fluid pressure unit
Front-wheel wheel cylinder and rear-wheel wheel cylinder are connect by unit with brake fluid potential source respectively, and two-way or four is arranged in the additional mechanical supercharging unit
Road, when two-way is arranged, two front-wheel wheel cylinders or two rear-wheel wheel cylinders are connect by two-way additional mechanical supercharging unit with additional mechanical supercharging source,
When four tunnels is arranged, front-wheel wheel cylinder and rear-wheel wheel cylinder are connect by four road additional mechanical supercharging units with additional mechanical supercharging source respectively；
When vehicle braking, when front-wheel wheel cylinder or rear-wheel wheel cylinder need to depressurize, controls corresponding brake fluid pressure unit movement and carry out
Decompression controls corresponding brake fluid pressure unit movement and is pressurized when front-wheel wheel cylinder or rear-wheel wheel cylinder need to be pressurized, same to time control
It makes corresponding additional mechanical supercharging unit movement and carries out additional mechanical supercharging.
2. a kind of accurate regulating system of brake fluid pressure for meeting wheel cylinder boost demand according to claim 1, feature
It is, the brake fluid potential source includes first motor, deceleration mechanism, the first fluid reservoir and master cylinder, first electricity
Machine connects master cylinder input terminal by deceleration mechanism, and master cylinder output end connects front-wheel wheel cylinder by brake fluid pressure unit
With rear-wheel wheel cylinder, the master cylinder connects the first fluid reservoir.
3. a kind of accurate regulating system of brake fluid pressure for meeting wheel cylinder boost demand according to claim 1, feature
It is, the brake fluid pressure unit includes brake fluid pressure branch, is equipped in the brake fluid pressure branch for connecing
On-off opens the first solenoid valve of the branch.
4. a kind of accurate regulating system of brake fluid pressure for meeting wheel cylinder boost demand according to claim 3, feature
It is, first solenoid valve is normally open solenoid valve.
5. a kind of accurate regulating system of brake fluid pressure for meeting wheel cylinder boost demand according to claim 1, feature
It is, the additional mechanical supercharging source includes the second motor, the second fluid reservoir and booster pump, and second motor connects booster pump
Input terminal, pressurization pump output terminal by additional mechanical supercharging unit connect front-wheel wheel cylinder or rear-wheel wheel cylinder or connect simultaneously front-wheel wheel cylinder and
Rear-wheel wheel cylinder, the booster pump connect the second fluid reservoir.
6. a kind of accurate regulating system of brake fluid pressure for meeting wheel cylinder boost demand according to claim 1, feature
It is, the additional mechanical supercharging unit includes additional mechanical supercharging branch, is equipped in the additional mechanical supercharging branch for connecing on-off
Open the second solenoid valve of the branch.
7. a kind of accurate regulating system of brake fluid pressure for meeting wheel cylinder boost demand according to claim 6, feature
It is, the second solenoid valve is normally open solenoid valve.
8. a kind of accurate regulating system of brake fluid pressure for meeting wheel cylinder boost demand according to claim 1, feature
It is, the hydraulic coupling detection unit includes the hydraulic coupling being correspondingly connected with respectively with two front-wheel wheel cylinders and two rear-wheel wheel cylinders
Sensor, the hydraulic force snesor are connected to electronic control unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811134165.2A CN109159777A (en) | 2018-09-27 | 2018-09-27 | A kind of accurate regulating system of brake fluid pressure meeting wheel cylinder boost demand |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811134165.2A CN109159777A (en) | 2018-09-27 | 2018-09-27 | A kind of accurate regulating system of brake fluid pressure meeting wheel cylinder boost demand |
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| Publication Number | Publication Date |
|---|---|
| CN109159777A true CN109159777A (en) | 2019-01-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811134165.2A Pending CN109159777A (en) | 2018-09-27 | 2018-09-27 | A kind of accurate regulating system of brake fluid pressure meeting wheel cylinder boost demand |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112622853A (en) * | 2019-10-08 | 2021-04-09 | 现代摩比斯株式会社 | Electronic hydraulic brake device |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108501921A (en) * | 2018-05-04 | 2018-09-07 | 吉林大学 | A kind of hydraulic pressure line control brake system and its brake control method with double pressure sources |
| CN208978835U (en) * | 2018-09-27 | 2019-06-14 | 同济大学 | A kind of accurate regulating system of brake fluid pressure meeting wheel cylinder boost demand |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108501921A (en) * | 2018-05-04 | 2018-09-07 | 吉林大学 | A kind of hydraulic pressure line control brake system and its brake control method with double pressure sources |
| CN208978835U (en) * | 2018-09-27 | 2019-06-14 | 同济大学 | A kind of accurate regulating system of brake fluid pressure meeting wheel cylinder boost demand |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112622853A (en) * | 2019-10-08 | 2021-04-09 | 现代摩比斯株式会社 | Electronic hydraulic brake device |
| CN112622853B (en) * | 2019-10-08 | 2023-12-05 | 现代摩比斯株式会社 | Electronic hydraulic brake device |
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