CN208198393U - The brake fluid system of electric-machine directly-driven parallel connection two-pack cylinder - Google Patents
The brake fluid system of electric-machine directly-driven parallel connection two-pack cylinder Download PDFInfo
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- CN208198393U CN208198393U CN201820602343.9U CN201820602343U CN208198393U CN 208198393 U CN208198393 U CN 208198393U CN 201820602343 U CN201820602343 U CN 201820602343U CN 208198393 U CN208198393 U CN 208198393U
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Abstract
The utility model provides the brake fluid system of electric-machine directly-driven parallel connection two-pack cylinder, and the control unit of the system is formed via normal open switch solenoid valve with the electric-machine directly-driven two-pack cylinder pressure control component that master cylinder is connected by the road by two groups；In the electric-machine directly-driven two-pack cylinder pressure control component, one booster electric machine is mechanically connected two secondary cylinders respectively, the pair cylinder upstream is connected with normal open switch solenoid valve, and secondary cylinder downstream is connected by a pressure sensor with a brake after connecting with a normally opened linear solenoid valve；The normal open switch solenoid valve, booster electric machine, normally opened linear solenoid valve and pressure sensor are connect with electronic control unit signal respectively.The utility model solves to motor performance requirement height, builds the technical problems such as the pressure time is long and braking fluctuation is larger.
Description
Technical field
The utility model belongs to new-energy automobile braking technology field, and in particular to a kind of electric-machine directly-driven parallel connection two-pack cylinder
Brake fluid system.
Background technique
In the case where environmental problem is increasingly serious, new-energy automobile is able to fast development with its environmental-friendly feature.
And it is increasingly mature with new-energy automobile technology, more stringent requirements are proposed for safety of the automobile vendor to vehicle, wants herein
It asks down, to stability, the reliability of the braking system of vehicle, more stringent requirements are proposed.It is simultaneously realization vehicle component layout
It is reasonable and compact, it is desirable that motor vehicle braking system will have higher integrated level.
The braking system of conventional fuel oil automobile is largely vacuum assisted hydraulic brake system, depends on vacuum and helps
Power device carries out power-assisted pressurization, while electronic vacuum pump energy consumption when being worked is higher, and vacuum assisted hydraulic brake system zero
Component is more, complex when being arranged and safeguarding on vehicle.New-energy automobile is to the integrated level of braking system and reliable
Property is more demanding, needs to develop new braking system thus and meets the needs of vehicle.
In the patent of invention that the patent publication No. of Tsinghua University's application is CN105667484A, propose that a kind of full decoupling is double
Motor-driven line control brake system, which passes through the power-assisted in double assist motors realization braking process, instead of true
Vacuum booster in empty assisted hydraulic brake system, simplifies braking system more；The braking system has pedal sense simultaneously
Feel simulator, it can be achieved that brake feel simulation.High-pressure brake liquid is generated in braking process in master cylinder, realizes braking.But
Two master cylinder reinforcement rooms will affect the feedback of brake feel there are certain interference in braking process, and bi-motor drives simultaneously
Piston push rod, it is more demanding to the coordinated control of motor.
Summary of the invention
For above-mentioned defect existing in the prior art, the utility model provides the hydraulic of electric-machine directly-driven parallel connection two-pack cylinder
Braking system solves to motor performance requirement height, builds the problems such as pressure time is long and braking fluctuation is larger.It is attached in conjunction with specification
Figure, the technical solution of the utility model are as follows:
The brake fluid system of electric-machine directly-driven parallel connection two-pack cylinder, the system is by electronic control unit, brake pedal
Mechanism, master cylinder, braking pressure control unit and brake composition；
By two groups via normal open switch solenoid valve and master cylinder phase piping connection in the braking pressure control unit
Electric-machine directly-driven two-pack cylinder pressure control component composition；
In the electric-machine directly-driven two-pack cylinder pressure control component, a booster electric machine is mechanically connected two secondary cylinders, the pair respectively
Cylinder upstream is connected with normal open switch solenoid valve, and secondary cylinder downstream passes through after connecting with a normally opened linear solenoid valve by a pressure sensing
Device is connected with a brake；
The normal open switch solenoid valve, booster electric machine, normally opened linear solenoid valve and pressure sensor respectively with electronic control
Cell signal connection.
The pair cylinder is by secondary cylinder piston, secondary cylinder input push rod, secondary cylinder housing and secondary cylinder spring, the inner end of the secondary cylinder piston
Secondary cylinder inner cavity is formed between face and secondary cylinder housing；One end of the pair cylinder input push rod and the output end machinery of booster electric machine connect
It connects, the other end of secondary cylinder input push rod is connected with secondary cylinder piston outer end face, and secondary cylinder spring is placed in intracavitary in secondary cylinder, one end and secondary cylinder
Piston inner face is connected, and the other end is connected with secondary cylinder housing bottom；Open on the pair cylinder housing there are two hydraulic fluid port, one with it is normally opened
Switch electromagnetic valve piping connection, another and normally opened linear solenoid valve piping connection.
The brake pedal mechanism is made of brake pedal 1, pedal sense simulator 12 and oil storage cup 15；
The master cylinder is by pedal push rod 3, push rod shell 4, displacement sensor 2, pedal piston 5 and 7 groups of master cylinder spring
At；
One end of the brake pedal 1 and pedal push rod 3 is hinged, the other end of pedal push rod and stepping in push rod shell 4
The outer end face of plate piston 5 connects, and master cylinder inner cavity 6, master cylinder spring 7 are formed on the inner face of pedal piston 5 and the bottom of push rod shell 4
It is connected between the inner face of pedal piston 5 and the bottom of push rod shell 4, is provided on the corresponding push rod shell 4 in master cylinder inner cavity 6
For the hydraulic fluid port of external pipeline, institute's displacement sensors 2 are mounted on pedal push rod 3, and are connected with 16 signal of electronic control unit
It connects；
The pedal sense simulator 12 and 6 piping connection of master cylinder inner cavity.
The pedal sense simulator 12 is by the first normally closed switch solenoid valve 13, simulator shell 10,9 and of emulator piston
Simulator spring 8 forms, and simulator inner cavity 11 is formed between the front end face and simulator shell 10 of the emulator piston 9；Mould
Quasi- device inner cavity 11 passes through 13 piping connection of the first normally closed switch solenoid valve, 8 both ends of the simulator spring difference with master cylinder inner cavity 6
It is connect with the bottom surface of the rear end face of emulator piston 9 and simulator shell 10.
The master cylinder inner cavity 6 is oil storage cup 15 into master cylinder by a check valve 14 and 15 piping connection of oil storage cup
6 one-way conduction of chamber；The pair cylinder downstream connect with a normally opened linear solenoid valve after also via a normally closed switch solenoid valve and
Oil storage cup is connected；
The normally closed switch solenoid valve is connect with electronic control unit signal.
Compared with prior art, the utility model has the beneficial effects that:
1, the brake fluid system of electric-machine directly-driven parallel connection two-pack cylinder described in the utility model is pushed solid using booster electric machine
The input push rod of the secondary cylinder of two to connect together is pressurized two secondary cylinders simultaneously, and there are two booster electric machine, drops for braking system tool
Low requirement of the system to booster electric machine performance, which, which can also realize in braking process, actively builds pressure, Quick-pressurizing, accurate
The functions such as pressure control, failure braking and Brake energy recovery.
2, the brake fluid system of electric-machine directly-driven parallel connection two-pack cylinder described in the utility model eliminates traditional vacuum power-assisted
Device mechanism, system structure are simplified.
3, the brake fluid system of electric-machine directly-driven parallel connection two-pack cylinder described in the utility model realizes master cylinder and pair
The full decoupling of cylinder avoids driver and feels brake vibration, improves the comfort level of driving.
4, the brake fluid system of electric-machine directly-driven parallel connection two-pack cylinder described in the utility model can pass through electronic control unit
Interior control program realizes that conventional brake, ABS, TCS, ESC, ACC, AEB are related to APA etc. in the case where non-driver is intervened
Braking function under operating condition, creates conditions for intelligent driving.
5, the brake fluid system of electric-machine directly-driven parallel connection two-pack cylinder described in the utility model can both have in system energization
Brake-by-wire is realized under effect state, and can realize effective brake in the case where system cut-off fails, to ensure traffic safety,
Provide fail safe function.
6, the brake fluid system of electric-machine directly-driven parallel connection two-pack cylinder described in the utility model can be assisted with vehicle drive system
Work is adjusted, the recycling of braking energy is realized in braking process, braking energy is enable rationally to utilize.
Detailed description of the invention
Fig. 1 is the composed structure schematic diagram of the brake fluid system of electric-machine directly-driven parallel connection two-pack cylinder described in the utility model；
Fig. 2 is the structure of the first secondary cylinder in the brake fluid system of electric-machine directly-driven parallel connection two-pack cylinder described in the utility model
Schematic diagram；
In figure:
1 brake pedal, 2 displacement sensors, 3 pedal push rods, 4 push rod shells,
5 pedal pistons, 6 master cylinder inner cavities, 7 master cylinder springs, 8 simulator springs,
9 emulator pistons, 10 simulator shells, 11 simulator inner cavities, 12 pedal sense simulators,
13 first normally closed switch solenoid valves, 14 check valves, 15 oil storage cups, 16 electronic control units,
17 first normal open switch solenoid valves, 18 second normal open switch solenoid valves, 19 first secondary cylinders, 20 first pressurization electricity
Machine,
21 second secondary cylinders, 22 first normally opened linear solenoid valves, 23 first normally opened linear solenoid valves, 24 second normally closed open
Powered-down magnet valve,
25 first pressure sensors, 26 first brakes, 27 second pressure sensors, 28 second brakes,
29 third normally closed switch solenoid valves, the normally opened linear solenoid valve of 30 thirds, 31 third pressure sensors, 32 thirds
Brake,
Switch electromagnetic valve, 36 the 4th pressure are closed in 33 the 4th normally closed switch solenoid valves, 34 the 4th brakes, 35 5 constant virtues
Sensor,
37 the 4th normally opened linear solenoid valves, 38 third pair cylinders, 39 second booster electric machines, 40 fourth officer cylinders；
1901 first secondary cylinder pistons, 1,902 first secondary cylinder inner cavities, 1,903 first secondary cylinder springs, 1,904 first secondary cylinder shells
Body,
1905 first secondary cylinders input push rod；
Specific embodiment
For technical solution described in the utility model is further described, in conjunction with Figure of description, the specific reality of the utility model
It is as follows to apply mode:
The utility model provides a kind of brake fluid system of electric-machine directly-driven parallel connection two-pack master cylinder, by electronic control unit
16, brake pedal mechanism, master cylinder, braking pressure control unit and brake composition.
As shown in Figure 1, the brake pedal mechanism is by brake pedal 1, pedal sense simulator 12 and oil storage cup 15
Composition；
The master cylinder is by pedal push rod 3, push rod shell 4, displacement sensor 2, pedal piston 5 and 7 groups of master cylinder spring
At formation master cylinder inner cavity 6 between the front end face and push rod shell 4 of the pedal piston 5；
The pedal sense simulator 12 is by the first normally closed switch solenoid valve 13, simulator shell 10,9 and of emulator piston
Simulator spring 8 forms, and simulator inner cavity 11 is formed between the front end face and simulator shell 10 of the emulator piston 9；
Hingedly on the car body, 1 bottom end of brake pedal is to trample end, and driver tramples braking and steps on 1 top of brake pedal
End is trampled in the bottom end of plate 1, and brake pedal 1 will be around the hinged spot wobble in top；The middle part of the brake pedal 1 and pedal push rod 3 one
End is hinged, and 3 other end of pedal push rod is connect with the rear end face of pedal piston 5, and the pedal push rod 3 is by stepping on brake pedal 1
Plate thrust is transferred to and pedal piston 5；Institute's displacement sensors 2 are mounted on pedal push rod 3, and displacement sensor 2 passes through electronics
Connection is to electronic control unit 16；7 both ends of master cylinder spring respectively with the front end face of pedal piston 5 and push rod shell 4
Bottom surface connection；Hydraulic fluid port there are three being opened on the corresponding push rod shell 4 in the master cylinder inner cavity 6, wherein first on push rod shell 4
Hydraulic fluid port by the first normally closed switch solenoid valve 13 and 11 piping connection of simulator inner cavity, 8 both ends of simulator spring respectively at
The rear end face of emulator piston 9 is connected with the bottom surface of simulator shell 10, when hydraulic oil enters pedal sense simulator inner cavity 11
Afterwards, pedal sense simulator spring 8 generates elastic force；When being normally carried out braking, brake feel can be realized by pedal sense simulator
The simulation of feel；The second hydraulic fluid port on push rod shell 4 is by a check valve 14 and 15 piping connection of oil storage cup, and check valve 14
Installation direction is that oil storage cup 15 supplements brake fluid to master cylinder inner cavity 6 for oil storage cup 15 to 6 one-way conduction of master cylinder inner cavity, and prevents
Only the brake fluid in master cylinder inner cavity 6 flows back to oil storage cup 15.
The braking pressure control unit is by two normal open switch solenoid valves and two groups of electric-machine directly-driven two-pack cylinder pressure control components
Composition；
First motor directly drives two-pack cylinder pressure control component and is connected by the first normal open switch solenoid valve 17 with master cylinder inner cavity 6, institute
It states first motor and directly drives two-pack cylinder pressure control component by the first the 20, first secondary cylinder 19, second of booster electric machine secondary cylinder 21, the first normally opened line
Property solenoid valve 23, the second normally opened linear solenoid valve 22, the second normally closed switch solenoid valve 24, third normally closed switch solenoid valve 29,
One pressure sensor 25 and second pressure sensor 27 form.
First booster electric machine 20 passes through piston of the mechanical driving device respectively with the first secondary cylinder 19 and the second secondary cylinder 21
Connection；First normal open switch solenoid valve 17 passes through inner cavity one hydraulic fluid port of the fluid pressure line respectively with the first secondary cylinder 19 and the second secondary cylinder 21
It is connected；Another hydraulic fluid port in inner cavity of first secondary cylinder 19 is divided into two-way after connecting the first normally opened linear solenoid valve 23 by fluid pressure line,
All the way through the second normally closed switch solenoid valve 24 and 15 piping connection of oil storage cup, another way is connected to the through first pressure sensor 25
One brake 26；Another hydraulic fluid port in inner cavity of second secondary cylinder 21 is divided into after connecting the second normally opened linear solenoid valve 22 by fluid pressure line
Two-way, all the way through third normally closed switch solenoid valve 29 and 15 piping connection of oil storage cup, another way connects through second pressure sensor 27
It is connected to second brake 28.
Second electric-machine directly-driven two-pack cylinder pressure control component is connected by the second normal open switch solenoid valve 18 with master cylinder inner cavity 6, institute
The second electric-machine directly-driven two-pack cylinder pressure control component is stated by the second booster electric machine 39, third pair cylinder 38, fourth officer cylinder 40, the normally opened line of third
Switch electromagnetic valve 35, are closed in property solenoid valve 30, the 4th normally opened linear solenoid valve 37, the 4th normally closed switch solenoid valve 33,5 constant virtues
Three pressure sensors 31 and the 4th pressure sensor 36 composition.
Second booster electric machine 39 passes through the mechanical driving device piston with third pair cylinder 38 and fourth officer cylinder 40 respectively
Connection；Second normal open switch solenoid valve 18 passes through fluid pressure line one hydraulic fluid port of inner cavity with third pair cylinder 38 and fourth officer cylinder 40 respectively
It is connected；Another hydraulic fluid port in inner cavity of third pair cylinder 38 is divided into two-way after connecting the normally opened linear solenoid valve 30 of third by fluid pressure line,
All the way through the 4th normally closed switch solenoid valve 33 and 15 piping connection of oil storage cup, another way is connected to the through third pressure sensor 31
Three brakes 32；Another hydraulic fluid port in the inner cavity of fourth officer cylinder 40 is divided into after connecting the 4th normally opened linear solenoid valve 37 by fluid pressure line
Two-way, closes switch electromagnetic valve 35 and 15 piping connection of oil storage cup through 5 constant virtues all the way, and another way connects through the 4th pressure sensor 36
It is connected to the 4th brake 34.
The described first secondary cylinder 21 of secondary cylinder 19, second, third pair cylinder 38 are identical with the structure of fourth officer cylinder 40.Such as Fig. 2
Shown, the described first secondary cylinder 19 is by the first secondary cylinder housing 1904 of the 1901, first secondary cylinder input push rod 1905, first of secondary cylinder piston
With the first secondary cylinder spring 1903, first is formed between the inner face of first secondary cylinder piston 1901 and the first secondary cylinder housing 1904
Secondary cylinder inner cavity 1902；One end of described first secondary cylinder input push rod 1905 passes through mechanical driving device and the second booster electric machine 39
Output end be connected, the other end of the first secondary cylinder input push rod 1905 is connected with 1901 outer end face of the first secondary cylinder piston, the first pair
Cylinder spring 1903 is placed in the first secondary cylinder inner cavity 1902, and one end is connected with 1901 inner face of the first secondary cylinder piston, the other end and the
One secondary 1904 bottom of cylinder housing is connected；Hydraulic fluid port there are two being opened on described first secondary cylinder housing 1904, one and the first normal open switch
18 piping connection of solenoid valve, another and the first normally opened 23 piping connection of linear solenoid valve.
The first normally closed switch solenoid valve 13, the second normally closed switch solenoid valve 24, third normally closed switch solenoid valve 29,
Four normally closed switch solenoid valves 33 and 5 constant virtues are closed switch electromagnetic valve 35 and are connect respectively with 16 electronic circuit of electronic control unit,
Blocking state is under off-position, it is in the conductive state in the energized state；The first normal open switch solenoid valve 17,
Two normal open switch solenoid valves 18, the first normally opened linear solenoid valve 23, the second normally opened linear solenoid valve 22, the normally opened linear electromagnetic of third
Valve 30, the 4th normally opened linear solenoid valve 37 are connect with 16 electronic circuit of electronic control unit respectively, are located in the power-off state
In on state, it is in blocking state in the energized state.
The brake includes the first brake 26, second brake 28, third brake 32 and the 4th brake 34, institute
Stating brake is disk brake or drum brake；As shown in Figure 1, the first brake 26 is near front wheel brake, the second system
Dynamic device 28 is off hind wheel brake, and third brake 32 is off-front wheel brake, and the 4th brake 34 is left rear wheel brake.
The electronic control unit 16 passes through electronic circuit for the control to entire braking system, electronic control unit 16
It is normally opened with the first normal open switch solenoid valve 17, the second normal open switch solenoid valve 18, the first normally opened linear solenoid valve 23, second respectively
The normally opened linear solenoid valve 30 of linear solenoid valve 22, third, the 4th normally opened linear solenoid valve 37, the first normally closed switch solenoid valve 13,
Second normally closed switch solenoid valve 24, third normally closed switch solenoid valve 29, the 4th normally closed switch solenoid valve 33 and the 5th normally closed switch
Solenoid valve 35 is connected；The electronic control unit 16 by electronic circuit respectively with displacement sensor 2, first pressure sensor
25, second pressure sensor 27, third pressure sensor 31 are connected with the 4th pressure sensor 36；Electronic control unit 16 is logical
Electronic circuit is crossed to be connected with the first booster electric machine 20 and the second booster electric machine 39 respectively.
The course of work of the brake fluid system of electric-machine directly-driven parallel connection two-pack cylinder described in the utility model includes: energization shape
The brake control process under brake control process and off-position under state；
The braking process is specific as follows:
1, under energization effective status, the brake control process of the brake fluid system of the electric-machine directly-driven parallel connection two-pack cylinder
It is as follows:
1.1 brake pedal brake feel simulation processes:
As shown in Figure 1, brake pedal 1 pushes pedal push rod 3 to move forward, pedal push rod when driver tramples brake pedal 1
3 promotion pedal pistons 5 move in master cylinder inner cavity 6, and electronic control unit 16 controls at the first normally closed switch solenoid valve 13 at this time
In the channel status opened that is powered, meanwhile, first normal open switch solenoid valve 17 of the control of electronic control unit 16 and second normally opened is opened
Powered-down magnet valve 18 is in the off state for being powered and closing, and the brake pressure of control pedal power and brake realizes full decoupling at this time,
Hydraulic oil in the master cylinder inner cavity 6 passes through fluid pressure line under the action of pedal piston 5, through the first normally closed switch solenoid valve stream
Entering in simulator inner cavity 11, hydraulic oil pushes emulator piston 9 to move, and 9 rear end of emulator piston is connected with simulator spring 8,
Simulator spring 8 pushes generation deformation to form elastic resistance by emulator piston 9, realizes that simulating brake pedal brake is felt；When
Driver loosen the brake 1 when, simulator spring 8 pushed under the action of restoring force emulator piston 9 move forward, simulation
Device piston 9 further pushes hydraulic oil to flow back in master cylinder inner cavity 6 by oil liquid pipeline through the first normally closed switch solenoid valve 13.
1.2 brake pressurization control processes
As shown in Figure 1, electronic control unit 16 controls the first normally closed switch electromagnetism when driver tramples brake pedal 1
Valve 13 is in the channel status for being powered and opening, and the hydraulic oil in master cylinder inner cavity 6 is flowed into through the first normally closed switch solenoid valve 13 simulates
In device inner cavity 11, brake pedal 1 moves forward, and brake pedal displacement signal is sent in electronic control unit 16 by displacement sensor 2,
Electronic control unit 16 is according to the brake pedal displacement signal of input, or without in the case where trampling brake pedal 1, electronics
Control unit 16 exports braking pressurization control by other onboard sensors and detection system judgement and to braking pressure control unit
Signal processed；
1.2.1 26 booster brake of the first brake:
Under the monitoring of first pressure sensor 25, the pressure in the first brake 26 reaches preset brake pressure
Before, electronic control unit 16 issues control instruction, wherein electronic control unit 16 controls the first normal open switch solenoid valve 17 and is in
Be powered the off state closed, and electronic control unit 16 controls the first normally opened linear solenoid valve 22 and is in the access shape that power-off is opened
State, electronic control unit 16 control the second normally closed switch solenoid valve 24 and are in the off state that power-off is closed, electronic control unit
16 export control signal to the first booster electric machine 20, control the output of the first booster electric machine 20, the first booster electric machine 20 passes through machine
Tool transmission device pushes the first secondary cylinder piston 1901 in the first secondary cylinder 19 to travel forward, and produces in the first secondary cylinder inner cavity 1902
Brake pressure is given birth to, the brake pressure in the first secondary cylinder inner cavity 1902 is transferred to the first brake through the first normally opened linear solenoid valve 22
26, realize 26 booster brake of the first brake；In addition, electronic control is single during above-mentioned first brake, 26 booster brake
Member 16 also issues regulating control command to the first normally opened linear solenoid valve 22, controls the aperture of the first normally opened linear solenoid valve 22,
And then linear regulation flows through the brake fluid pressure of the first normally opened linear solenoid valve 22, realizes the increasing of the first brake of linear regulation 26
Suppress dynamic pressure.
1.2.2 28 booster brake of second brake:
Under the monitoring of second pressure sensor 27, the pressure in second brake 28 reaches preset brake pressure
Before, electronic control unit 16 issues control instruction, wherein electronic control unit 16 controls the first normal open switch solenoid valve 17 and is in
Be powered the off state closed, and electronic control unit 16 controls the second normally opened linear solenoid valve 23 and is in the access shape that power-off is opened
State, electronic control unit 16 control third normally closed switch solenoid valve 29 and are in the off state that power-off is closed, electronic control unit
16 export control signal to the first booster electric machine 20, control the output of the first booster electric machine 20, the first booster electric machine 20 passes through machine
Tool transmission device pushes the second secondary cylinder piston in the second secondary cylinder 21 to travel forward, and the intracavitary generation braking pressure in the second secondary cylinder
Power, intracavitary brake pressure is transferred to second brake 28 through the second normally opened linear solenoid valve 23 in the second secondary cylinder, realizes second
28 booster brake of brake；In addition, electronic control unit 16 is also to second during above-mentioned 28 booster brake of second brake
Normally opened linear solenoid valve 23 issues regulating control command, controls the aperture of the second normally opened linear solenoid valve 23, and then linear regulation
The brake fluid pressure of the second normally opened linear solenoid valve 23 is flowed through, realizes the booster brake pressure of linear regulation second brake 28.
1.2.3 32 booster brake of third brake:
Under the monitoring of third pressure sensor 31, the pressure in third brake 32 reaches preset brake pressure
Before, electronic control unit 16 issues control instruction, wherein electronic control unit 16 controls the second normal open switch solenoid valve 18 and is in
Be powered the off state closed, and electronic control unit 16 controls the normally opened linear solenoid valve 30 of third and is in the access shape that power-off is opened
State, electronic control unit 16 control the 4th normally closed switch solenoid valve 33 and are in the off state that power-off is closed, electronic control unit
16 export control signal to the second booster electric machine 39, control the output of the second booster electric machine 39, the second booster electric machine 39 passes through machine
Tool transmission device pushes the third secondary cylinder piston in third pair cylinder 38 to travel forward, and the intracavitary generation braking pressure in third pair cylinder
Power, intracavitary brake pressure is transferred to third brake 32 through the normally opened linear solenoid valve 30 of third in third pair cylinder, realizes third
32 booster brake of brake；In addition, electronic control unit 16 is also to third during above-mentioned 32 booster brake of third brake
Normally opened linear solenoid valve 30 issues regulating control command, controls the aperture of the normally opened linear solenoid valve 30 of third, and then linear regulation
The brake fluid pressure of the normally opened linear solenoid valve 30 of third is flowed through, realizes the booster brake pressure of linear regulation third brake 32.
1.2.4 34 booster brake of the 4th brake:
Under the monitoring of the 4th pressure sensor 36, the pressure in the 4th brake 34 reaches preset brake pressure
Before, electronic control unit 16 issues control instruction, wherein electronic control unit 16 controls the second normal open switch solenoid valve 18 and is in
Be powered the off state closed, and electronic control unit 16 controls the 4th normally opened linear solenoid valve 37 and is in the access shape that power-off is opened
State, electronic control unit 16 control 5 constant virtues and close the off state that switch electromagnetic valve 35 is in power-off closing, electronic control unit
16 export control signal to the second booster electric machine 39, control the output of the second booster electric machine 39, the second booster electric machine 39 passes through machine
Tool transmission device pushes the 4th secondary cylinder piston in fourth officer cylinder 40 to travel forward, and the intracavitary generation braking pressure in fourth officer cylinder
Power, intracavitary brake pressure is transferred to the 4th brake 34 through the 4th normally opened linear solenoid valve 37 in fourth officer cylinder, realizes the 4th
34 booster brake of brake；In addition, electronic control unit 16 is also to the 4th during above-mentioned 4th 34 booster brake of brake
Normally opened linear solenoid valve 37 issues regulating control command, controls the aperture of the 4th normally opened linear solenoid valve 37, and then linear regulation
The brake fluid pressure of the 4th normally opened linear solenoid valve 37 is flowed through, realizes the booster brake pressure of the 4th brake 37 of linear regulation.
1.3 brake holding pressure control processes
As shown in Figure 1, when needing the first brake 26, second brake 28, third brake 32 or the 4th brake 34
When keeping brake pressure, electronic control unit 16 controls corresponding first normally opened linear solenoid valve 22, the second normally opened linear electromagnetic
The normally opened linear solenoid valve 30 of valve 23, third or the 4th normally opened linear solenoid valve 37 are in the off state for being powered and closing, electronics control
Unit 16 processed controls the second normally closed switch solenoid valve 24, third normally closed switch solenoid valve 29,33 and of the 4th normally closed switch solenoid valve
5 constant virtues closes switch electromagnetic valve 37 and is in the off state that power-off is closed, the first brake 26, second brake 28, third system
High-pressure brake liquid in dynamic device 32 or the 4th brake 34 remains stationary, thus realize the first brake 26, second brake 28,
The service lap of third brake 32 or the 4th brake 34.
1.4 brake Decompression Controlling process
As shown in Figure 1, when driver loosen the brake 1 when, electronic control unit 16 control the first normally closed switch electromagnetism
Valve 13 is in the channel status for being powered and opening, and the hydraulic oil in simulator inner cavity 11 is flowed back to through the first normally closed switch solenoid valve 13
In master cylinder inner cavity 6, brake pedal 1 is moved back, and brake pedal displacement signal is sent to electronic control unit 16 by displacement sensor 2
In, electronic control unit 16 is according to the brake pedal displacement signal of input, or without in the case where trampling control pedal 1,
Electronic control unit 16 by other onboard sensors and detection system judgement and exports braking compression release control to pressure control unit
Signal processed；
1.4.1 26 pressure m of the first brake
As shown in Figure 1, the pressure in the first brake 26 reaches preset under the monitoring of first pressure sensor 25
Before pressure value, electronic control unit 16 issues control instruction, wherein electronic control unit 16 controls the first normal open switch solenoid valve
17 in the off state closed that is powered, and electronic control unit 16 controls the first normally opened linear solenoid valve 22 and is in what power-off was opened
Channel status, electronic control unit 16 export control signal to the first booster electric machine 20, control the output of the first booster electric machine 20,
First booster electric machine 20 pulls the first secondary cylinder piston 1901 in the first secondary cylinder 19 to move backward by mechanical driving device, and first
High-pressure brake liquid in brake 25 by the first normally opened linear solenoid valve 22, will flow back to the first secondary cylinder inner cavity of the first secondary cylinder 19
1902, realize 25 braking compression release of the first brake；Analogously with 26 booster brake process of the first brake, in above-mentioned first system
During dynamic 26 braking compression release of device, electronic control unit 16, which also issues to adjust to control to the first normally opened linear solenoid valve 22, to be referred to
It enables, controls the aperture of the first normally opened linear solenoid valve 22, and then linear regulation flows through the braking of the first normally opened linear solenoid valve 22
Hydraulic coupling realizes the pressure m pressure of the first brake of linear regulation 26；
In addition, electronic control unit 16 can also be according to practical feelings during above-mentioned first brake, 26 braking compression release
Condition controls the second normally closed switch solenoid valve 24 and is in the channel status for being powered and opening, and makes the high-pressure brake liquid in the first brake 26
It can directly be flowed into oil storage cup 15 by the second normally closed switch solenoid valve 24, to realize 26 fast decompression of the first brake.
1.4.2 28 pressure m of second brake
As shown in Figure 1, the pressure in second brake 28 reaches preset under the monitoring of second pressure sensor 27
Before pressure value, electronic control unit 16 issues control instruction, wherein electronic control unit 16 controls the first normal open switch solenoid valve
17 in the off state closed that is powered, and electronic control unit 16 controls the second normally opened linear solenoid valve 23 and is in what power-off was opened
Channel status, electronic control unit 16 export control signal to the first booster electric machine 20, control the output of the first booster electric machine 20,
First booster electric machine 20 pulls the second secondary cylinder piston in the second secondary cylinder 21 to move backward by mechanical driving device, the second braking
High-pressure brake liquid in device 28 by the second normally opened linear solenoid valve 23, will flow back to the second secondary cylinder inner cavity of the second secondary cylinder 21, real
Existing 28 braking compression release of second brake；Analogously with 28 booster brake process of second brake, in above-mentioned second brake 28
During braking compression release, electronic control unit 16 also issues regulating control command, control to the second normally opened linear solenoid valve 23
The aperture of second normally opened linear solenoid valve 23, and then linear regulation flows through the brake fluid pressure of the second normally opened linear solenoid valve 23,
Realize the pressure m pressure of linear regulation second brake 28；
In addition, electronic control unit 16 can also be according to practical feelings during above-mentioned 28 braking compression release of second brake
Condition controls third normally closed switch solenoid valve 29 and is in the channel status for being powered and opening, and makes the high-pressure brake liquid in second brake 28
It can directly be flowed into oil storage cup 15 by third normally closed switch solenoid valve 29, to realize 28 fast decompression of second brake.
1.4.3 32 pressure m of third brake
As shown in Figure 1, the pressure in third brake 32 reaches preset under the monitoring of third pressure sensor 31
Before pressure value, electronic control unit 16 issues control instruction, wherein electronic control unit 16 controls the second normal open switch solenoid valve
18 in the off state closed that is powered, and electronic control unit 16 controls the normally opened linear solenoid valve 30 of third and is in what power-off was opened
Channel status, electronic control unit 16 export control signal to the second booster electric machine 39, control the output of the second booster electric machine 39,
Second booster electric machine 39 pulls the third secondary cylinder piston in third pair cylinder 38 to move backward by mechanical driving device, third braking
High-pressure brake liquid in device 32 will flow back to the third pair cylinder inner cavity of third pair cylinder 38 by the normally opened linear solenoid valve 30 of third, real
Existing 32 braking compression release of third brake；Analogously with 32 booster brake process of third brake, in above-mentioned third brake 32
During braking compression release, electronic control unit 16 also issues regulating control command, control to the normally opened linear solenoid valve 30 of third
The aperture of the normally opened linear solenoid valve 30 of third, and then linear regulation flows through the brake fluid pressure of the normally opened linear solenoid valve 30 of third,
Realize the pressure m pressure of linear regulation third brake 32；
In addition, electronic control unit 16 can also be according to practical feelings during above-mentioned 32 braking compression release of third brake
Condition controls the 4th normally closed switch solenoid valve 33 and is in the channel status for being powered and opening, and makes the high-pressure brake liquid in third brake 32
It can directly be flowed into oil storage cup 15 by the 4th normally closed switch solenoid valve 33, to realize 32 fast decompression of third brake.
1.4.4 34 pressure m of the 4th brake
As shown in Figure 1, the pressure in the 4th brake 32 reaches preset under the monitoring of the 4th pressure sensor 36
Before pressure value, electronic control unit 16 issues control instruction, wherein electronic control unit 16 controls the second normal open switch solenoid valve
18 in the off state closed that is powered, and electronic control unit 16 controls the 4th normally opened linear solenoid valve 37 and is in what power-off was opened
Channel status, electronic control unit 16 export control signal to the second booster electric machine 39, control the output of the second booster electric machine 39,
Second booster electric machine 39 pulls the 4th secondary cylinder piston in fourth officer cylinder 40 to move backward by mechanical driving device, the 4th braking
High-pressure brake liquid in device 34 will flow back to the fourth officer cylinder inner cavity of fourth officer cylinder 40 by the 4th normally opened linear solenoid valve 37, real
Existing 4th brake, 34 braking compression release；Analogously with 34 booster brake process of the 4th brake, in above-mentioned 4th brake 34
During braking compression release, electronic control unit 16 also issues regulating control command, control to the 4th normally opened linear solenoid valve 37
The aperture of 4th normally opened linear solenoid valve 37, and then linear regulation flows through the brake fluid pressure of the 4th normally opened linear solenoid valve 37,
Realize the pressure m pressure of the 4th brake 34 of linear regulation；
In addition, electronic control unit 16 can also be according to practical feelings during above-mentioned 4th 34 braking compression release of brake
Condition control 5 constant virtues closes switch electromagnetic valve 35 and is in the channel status for being powered and opening, and makes the high-pressure brake liquid in the 4th brake 34
Switch electromagnetic valve 35 directly can be closed by 5 constant virtues to flow into oil storage cup 15, to realize 34 fast decompression of the 4th brake.
In conclusion the brake fluid system of the electric-machine directly-driven parallel connection two-pack cylinder, under energization effective status, four are made
The pressurization pressure m control process of dynamic device is mutually indepedent.
2, under power-off failure state, the brake control process of the brake fluid system of the electric-machine directly-driven parallel connection two-pack cylinder
It is as follows:
As shown in Figure 1, when the brake fluid system of the electric-machine directly-driven parallel connection two-pack cylinder fails because of power-off, Ge Ge electricity
Magnet valve is restored to power-off initial default state, i.e. the first normally closed switch solenoid valve 13, the second normally closed switch solenoid valve 24, third
Normally closed switch solenoid valve 29, the 4th normally closed switch solenoid valve 33 and 5 constant virtues close switch electromagnetic valve 35 and are in what power-off was closed
Off state, the first normal open switch solenoid valve 17, the second normal open switch solenoid valve 18, the first normally opened linear solenoid valve 22, second
The normally opened linear solenoid valve 30 of normally opened linear solenoid valve 23, third and the 4th normally opened linear solenoid valve 37 are in the logical of power-off unlatching
Line state；
When driver, which tramples brake pedal 1, carries out power-off failure braking, brake pedal 1 pushes pedal push rod 3 to transport forward
Dynamic, pedal push rod 3 further pushes pedal piston 5 to travel forward, and the oil liquid in master cylinder inner cavity 6 will flow through first all the way and normally opened open
It respectively corresponds and is flowed into the inner cavity of the first secondary cylinder 19 and the second secondary cylinder 21 after powered-down magnet valve 17, then respectively via the first normally opened line
Property solenoid valve 22 and the second normally opened linear solenoid valve 23 respectively correspond to flow into the first brake 26 and second brake 28 and realize and increase
Compacting is dynamic；Oil liquid another way in master cylinder inner cavity 6 respectively corresponds inflow third pair cylinder after flowing through the second normal open switch solenoid valve 18
38 and fourth officer cylinder 40 inner cavity in, then respectively via the normally opened linear solenoid valve 30 of third and the 4th normally opened linear solenoid valve
37 respectively correspond inflow third brake 32 and the 4th brake 34 realization booster brake；
When driver loosens the brake 1 releasing braking, the first brake 26, second brake 28, third brake
32 and the 4th high-pressure brake liquid in brake 34 respectively through the first normally opened linear solenoid valve 22, the second normally opened linear electromagnetic
The normally opened linear solenoid valve 30 of valve 23, third and the 4th normally opened linear solenoid valve 37 respectively correspondingly flow back to the first secondary cylinder 19, second
In the inner cavity of secondary cylinder 21, third pair cylinder 38 and fourth officer cylinder 40, then through the first normal open switch solenoid valve 17 and the second normal open switch
Solenoid valve 18 flows back in master cylinder inner cavity 6, and at the same time, oil storage cup 15 will carry out fluid infusion to master cylinder inner cavity 6 by check valve 14, is
Braking is ready next time.
The function that the brake fluid system of electric-machine directly-driven parallel connection two-pack cylinder described in the utility model can be realized includes: normal
Regulation is dynamic, ABS (anti-lock braking system Anti-lockBrakingSystem) is braked, TCS (traction control system
Traction Control System) braking, ESC (body electronics stabilitrak Electronic Speed
Control System) braking, power-off failure braking, regenerative braking adjusts and ACC (adaptive cruise), AEB are (automatic tight
Anxious braking) and APA (automatic parking auxiliary) operating condition under intelligence auxiliary driving brake, the specific implementation process is as follows:
1, conventional brake: under energization effective status, driver is carried out simultaneously by control brake pedal 1, four brakes
Braking pressurization；Or four brakes carry out braking compression release simultaneously；In the process, brake fluid system energy described in the utility model
Enough simulate good pedal sense.
2, abs braking: when carrying out conventional brake, triggering ABS when electronic control unit 16 judges that locking occurs for wheel,
After triggering ABS control, four brakes successively carry out braking compression release, service lap or braking pressurization simultaneously, and repeatedly this
Process, until pressure is adjusted to optimum state；Alternatively, in four brakes, the pressurization of partial brake device, the pressure maintaining of partial brake device and
The decompression of remaining brake；In the process, brake fluid system described in the utility model can simulate good pedal sense, and
Master cylinder and brake full decoupling, driver do not feel as caused pressure oscillation when ABS is adjusted.
3, TCS is braked: in vehicle travel process, under energization effective status, electronic control unit 16 judges part vehicle
Wheel has skidded (by taking the near front wheel as an example), TCS control triggering, in the case, without trampling brake pedal 1, by being controlled electronically
Unit 16 directly controls four secondary cylinders and corresponding solenoid valve according to judgement, and then controls the increase and decrease pressure of four brakes, realizes
The full decoupling of master cylinder and secondary cylinder, brake corresponding to slip wheel carry out respectively under the control of electronic control unit 16
Braking pressurization, service lap or braking compression release, realize the control to slip wheel brake pressure, until eliminating beating for corresponding wheel
It is sliding；Alternatively, in four brakes, the pressurization of partial brake device, the pressure maintaining of partial brake device and remaining brake depressurizes；In this process
In, master cylinder and brake full decoupling, driver do not feel as caused pressure oscillation when pressure is adjusted.
4, ESC is braked: in vehicle travel process, under energization effective status, electronic control unit 16 judges part vehicle
There is unstability, ESC control triggering, in the case, without trampling brake pedal 1, by electronic control unit 16 according to judgement in wheel
Four secondary cylinders and corresponding solenoid valve are directly controlled, and then controls the increase and decrease pressure of four brakes, realizes master cylinder and secondary cylinder
Full decoupling, the corresponding brake installed of unstability wheel carry out braking pressurization, braking respectively under the control of electronic control unit 16
Pressure maintaining or braking compression release realize the control to slip wheel brake pressure, until unstability wheel restores normal；Alternatively, four institutes
It states in brake, the pressurization of partial brake device, the pressure maintaining of partial brake device and remaining brake depressurize；In the process, master cylinder
With brake full decoupling, driver does not feel as caused pressure oscillation when pressure is adjusted.
5, ACC is braked: in vehicle travel process, under energization effective status, electronic control unit 16 judges that vehicle needs
Active brake is wanted, driver outputs control signals to liquid described in the utility model by entire car controller without trampling brake pedal 1
In the electronic control unit 16 for pressing braking system, four brakes are directly controlled by electronic control unit 16 while carrying out braking increasing
Pressure, service lap or braking compression release.
6, AEB is braked: in vehicle travel process, under energization effective status, electronic control unit 16 judges that vehicle needs
Emergency braking is wanted, driver outputs control signals to liquid described in the utility model by entire car controller without trampling brake pedal 1
In the electronic control unit 16 for pressing braking system, four brakes are directly controlled by electronic control unit 16 while carrying out braking pressurization.
7, regenerative braking is adjusted: when vehicle carries out regenerative braking, need to realize the pedal force and brake system of brake pedal 1
The full decoupling of dynamic pressure, i.e., during carrying out Brake energy recovery, brake pressure demand that brake provides braking system
It reduces, but the pedal force of driver is needed to remain unchanged.The braking system can pass through the pedal sense simulator in braking system
To realize the full decoupling of pedal force and brake pressure in process of regenerative braking.When the braking system is in normal brake application process
In, after regenerative braking intervention, brake force needed for four wheels reduces, and by reasonable control algolithm, calculates four brakes
Signal is controlled needed for corresponding normally opened linear solenoid valve to control the pressure difference at linear solenoid valve both ends respectively, realizes braking pressure
The linear regulation of power.
8, power-off failure is braked: under power-off failure state, as previously mentioned, driver is by trampling brake pedal 1, four systems
Dynamic device brakes pressurization or braking compression release simultaneously；
In conclusion each control process of the brake fluid system of electric-machine directly-driven parallel connection two-pack cylinder described in the utility model
In, when electronic control unit 16 detects brake signal, four secondary cylinders and corresponding electromagnetism valve events can be controlled at once, so as to
It is enough actively and promptly to establish brake pressure for brake.Due to being electric signal control, whole process is by electronic control unit ECU
16 controls are completed, and human intervention is not necessarily to, and are controlled rapidly, sensitive, can satisfy the function of actively fast run-up pressure and rapid pressure adjusting
Energy.In addition, two booster electric machine movements of control simultaneously and normally opened line can be passed through during brake is pressurized or is depressurized
Property valve opening size, come realize brake pressure accurately adjust and accurately control.
Claims (5)
1. the brake fluid system of electric-machine directly-driven parallel connection two-pack cylinder, it is characterised in that:
The system is by electronic control unit, brake pedal mechanism, master cylinder, braking pressure control unit and brake
Composition；
By two groups of motors via normal open switch solenoid valve and master cylinder phase piping connection in the braking pressure control unit
It is straight to drive two-pack cylinder pressure control component composition；
In the electric-machine directly-driven two-pack cylinder pressure control component, a booster electric machine is mechanically connected two secondary cylinders respectively, on the pair cylinder
Trip is connected with normal open switch solenoid valve, secondary cylinder downstream pass through after being connect with a normally opened linear solenoid valve by a pressure sensor and
One brake is connected；
The normal open switch solenoid valve, booster electric machine, normally opened linear solenoid valve and pressure sensor respectively with electronic control unit
Signal connection.
2. the brake fluid system of electric-machine directly-driven parallel connection two-pack cylinder as described in claim 1, it is characterised in that:
The pair cylinder by secondary cylinder piston, secondary cylinder input push rod, secondary cylinder housing and secondary cylinder spring, the inner face of the secondary cylinder piston with
Secondary cylinder inner cavity is formed between secondary cylinder housing；One end of the pair cylinder input push rod and the output end of booster electric machine are mechanically connected, secondary
The other end of cylinder input push rod is connected with secondary cylinder piston outer end face, and secondary cylinder spring is placed in intracavitary in secondary cylinder, one end and secondary cylinder piston
Inner face is connected, and the other end is connected with secondary cylinder housing bottom；Hydraulic fluid port there are two being opened on the pair cylinder housing, one and normal open switch
Electromagnetic valve pipeline connection, another and normally opened linear solenoid valve piping connection.
3. the brake fluid system of electric-machine directly-driven parallel connection two-pack cylinder as described in claim 1, it is characterised in that:
The brake pedal mechanism is made of brake pedal (1), pedal sense simulator (12) and oil storage cup (15)；
The master cylinder is by pedal push rod (3), push rod shell (4), displacement sensor (2), pedal piston (5) and master cylinder spring
(7) it forms；
The brake pedal (1) and one end of pedal push rod (3) are hinged, in the other end of pedal push rod and push rod shell (4)
The outer end face of pedal piston (5) connects, and master cylinder inner cavity is formed on the inner face of pedal piston (5) and the bottom of push rod shell (4)
(6), master cylinder spring (7) is connected between the inner face of pedal piston (5) and the bottom of push rod shell (4), in master cylinder inner cavity (6)
The hydraulic fluid port for external pipeline is provided on corresponding push rod shell (4), institute's displacement sensors (2) are mounted on pedal push rod (3)
On, and connect with electronic control unit (16) signal；
The pedal sense simulator (12) and master cylinder inner cavity (6) piping connection.
4. the brake fluid system of electric-machine directly-driven parallel connection two-pack cylinder as claimed in claim 3, it is characterised in that:
The pedal sense simulator (12) is by the first normally closed switch solenoid valve (13), simulator shell (10), emulator piston
(9) it is formed with simulator spring (8), forms simulation between the front end face and simulator shell (10) of the emulator piston (9)
Device inner cavity (11)；Simulator inner cavity (11) and master cylinder inner cavity (6) are described by first normally closed switch solenoid valve (13) piping connection
Simulator spring (8) both ends are connect with the bottom surface of the rear end face of emulator piston (9) and simulator shell (10) respectively.
5. the brake fluid system of electric-machine directly-driven parallel connection two-pack cylinder as claimed in claim 3, it is characterised in that:
The master cylinder inner cavity (6) is oil storage cup (15) to master by check valve (14) and oil storage cup (15) piping connection
Cylinder inner cavity (6) one-way conduction；It is described pair cylinder downstream connect with a normally opened linear solenoid valve after also via a normally closed switch electricity
Magnet valve is connected with oil storage cup；
The normally closed switch solenoid valve is connect with electronic control unit signal.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820602343.9U CN208198393U (en) | 2018-04-26 | 2018-04-26 | The brake fluid system of electric-machine directly-driven parallel connection two-pack cylinder |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820602343.9U CN208198393U (en) | 2018-04-26 | 2018-04-26 | The brake fluid system of electric-machine directly-driven parallel connection two-pack cylinder |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108394392A (en) * | 2018-04-26 | 2018-08-14 | 吉林大学 | The brake fluid system and its brake control method of electric-machine directly-driven parallel connection two-pack cylinder |
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2018
- 2018-04-26 CN CN201820602343.9U patent/CN208198393U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108394392A (en) * | 2018-04-26 | 2018-08-14 | 吉林大学 | The brake fluid system and its brake control method of electric-machine directly-driven parallel connection two-pack cylinder |
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Granted publication date: 20181207 Termination date: 20190426 |