CN205417597U - Integrated automatically controlled hydraulic braking system of vehicle - Google Patents
Integrated automatically controlled hydraulic braking system of vehicle Download PDFInfo
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- CN205417597U CN205417597U CN201520318047.2U CN201520318047U CN205417597U CN 205417597 U CN205417597 U CN 205417597U CN 201520318047 U CN201520318047 U CN 201520318047U CN 205417597 U CN205417597 U CN 205417597U
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Abstract
The utility model relates to an integrated automatically controlled hydraulic braking system of vehicle. The structural feature of this system is: constitute by executor collection moulding piece, basic brake assembly, ECU controller, braking maneuver unit and spring energy storage ware. The utility model discloses abandoned traditional motor cooperation high -pressure accumulator's form, the life who has avoidd high -pressure accumulator less than system's problem of bringing ingeniously, on the other hand, the utility model discloses the three kinds of brake mode that have integrateed, conventional braking promptly, backup brake and ABS braking to can independently realize three kinds of braking mode through switching over the valves, guarantee and improved the security of applying the brake.
Description
Technical field
This utility model relates to vehicle braking control system field, a kind of integrated electric control hydraulic braking system being applicable to new energy vehicle and automatic driving vehicle.
Background technology
Along with the development of automotive engineering, new energy vehicle and automatic driving vehicle propose new requirement to brakes.Tradition depends on the Brake Products of vacuum booster, has employed many decades on fuel vehicle.From operation principle, its power-assisted effect needs the cooperation of electromotor, produces negative pressure and drive vacuum booster work when utilizing engine suction, and brake operating becomes the lightest.New-energy automobile, owing to being configured without electromotor or electromotor not continuous firing, the most universal solution is to drive vacuum pump to carry out power-assisted with motor, and so can make that automobile mechanism is huge, system complex.
It addition, along with the rise of automatic Pilot technology, safety is had higher requirement, automobile is needed to possess actively braking and emergent auxiliary brake function.2012, European Union passed through a new traffic safety regulation, it is desirable to started from 2014, and all European Union new car is required for being equipped with AEB self-actuating brake aid system, and the automobile being not equipped with this system obtains five-pointed star safety certification all without from E-NCAP.Automobile is if equipped with AEB, then when danger will occur, and driver reacts when speed is reduced or hidden the most in time, and this system will get involved and carry out auxiliary braking.Either the development of automotive engineering self updates, or government improves constantly the hard and fast rule of standard it can be seen that the motorized of automobile and intellectuality, in the urgent need to matched brand-new brakes to road safety.
Wire control technology introduces in Automobile Design and exploitation, and the solution for these problems have found breach.Electric control hydraulic braking system (EHB), as the one of brake-by-wire technology, has obtained rapid development in recent years.EHB to the transiting product of electromechanical braking system (EMB) as Conventional braking systems, remains tradition wheel cylinder brake unit, has abandoned vacuum booster simultaneously, built pressure with electric-motor pump, carried out simulating brake feel with pedal analogue unit.The wheel cylinder inside brake hydraulic pressure of wheel is no longer driven master cylinder to produce by driver pedal power, but is controlled high-speed electromagnetic valve and engine plunger pump by ECU, realizes braking to master cylinder pressurization, and this version is especially suitable for pure electric automobile and hybrid vehicle.
Being found by the investigation of present Research domestic and international to electric brake system, nowadays, the commonly used high pressure accumulator based on ESP of most of electric brake system coordinates the scheme of booster pump.But, some safety problems existed due to high pressure accumulator, if Toyota Company is due to problems such as the leakages of high pressure accumulator and safety, carry out at about 2010 repeatedly recalling, therefore new solution is all being found by many companies.
Utility model content
Technical problem to be solved in the utility model is to provide a kind of reasonable in design, level of integrated system is high, integrated and can freely switch three kinds of modes of braking, the vehicle integrated electric control hydraulic braking system of the safety that improves braking.
The technical scheme that the above-mentioned technical problem of this utility model solution is used is as follows:
A kind of vehicle integrated electric control hydraulic braking system, is made up of executor's integration module, foundation brake assembly, ECU controller, actuation unit and spring type mechanical accumulator；Executor's integration module is made up of pedal feel analogue unit, spring type mechanical accumulator, master cylinder assembly, electro-hydraulic power-assisted unit, braking mode switching valve, master cylinder pressure sensor, tapping valve and fluid reservoir, electro-hydraulic power-assisted unit is made up of the motor interconnected and plunger displacement pump, and braking mode switching valve is made up of conventional brake pattern switching valve, abs mode switching valve and alternate brake switching valve；
Foundation brake assembly is made up of four groups of wheel cylinders, Wheel cylinder pressure sensors, oil-feed electromagnetic valve, draining electromagnetic valve and wheel speed sensors；Actuation unit is made up of interconnective brake pedal and brake pedal displacement transducer；
Pedal feel analogue unit, brake pedal, brake switching valve and spring type mechanical accumulator, the motor being connected with plunger displacement pump, and fluid reservoir, plunger displacement pump, conventional brake pattern switching valve, master cylinder assembly and the foundation brake assembly being sequentially connected with, form conventional brake path；Brake pedal, pedal feel analogue unit, master cylinder assembly and the foundation brake assembly being sequentially connected with, forms alternate brake path；Pedal feel analogue unit, brake pedal, brake switching valve and spring type mechanical accumulator, the motor being connected with plunger displacement pump, and described fluid reservoir, plunger displacement pump, abs mode switching valve and the foundation brake assembly being sequentially connected with, form abs braking path；
Master cylinder pressure sensor, brake pedal displacement transducer and four groups of Wheel cylinder pressure sensors are connected with ECU controller signals respectively.
This utility model has been abandoned traditional motor and has been coordinated the form of high pressure accumulator, has evaded the system problem that service life, deficiency was brought of high pressure accumulator dexterously；On the other hand, this utility model is integrated with three kinds of modes of braking, i.e. conventional brake, alternate brake and abs braking, and can independently realize three kinds of braking modes by switching valve group, it is ensured that and improve the safety of braking；Meanwhile, the method coordinating switching valve by single motor, on the basis of not installing ABS module additional, realize ABS function, it is only necessary to carry out suitable rewriting to controlling logic, ABS function can be effectively realized, save the cost installing ABS module.
This utility model can apply to conventional fuel oil automobile, it is particularly suited for not relying on vacuum source new energy vehicle and being capable of the automatic driving vehicle of active/auxiliary brake function, enormously simplify the structure of brakes, save installation control, reduce cost；Faster system response, control accurately, can accurately reflect the braking intention of driver, and comfortable pedal sense is provided when artificial braking；Integrated level and function are obviously enhanced, and ensure travel safety when thrashing.ECU controller of the present utility model can assist in entire car controller and realizes from main brake and regenerative braking capability；Meanwhile, this utility model is as the active brake actuator of low layer, it is possible to the electric-control system of integrated various functions.
As preferably, master cylinder assembly is made up of the first chamber, the first chamber return spring, first piston, the second chamber, the second chamber return spring, the second chamber piston push rod assembly, the 3rd chamber and gear oil piston；First chamber return spring is arranged on the first intracavity, and connects bottom master cylinder and first piston；Second chamber return spring is arranged on the second intracavity, and connects first piston and the second chamber piston push rod assembly.Having an advantage in that, the setting of three chambers can ensure that the realization of conventional brake and alternate brake: during conventional brake, and gear oil piston is crushed on the bottom in the 3rd chamber, thus the chamber isolation in master cylinder the 3rd chamber with pedal analogue unit place is separated；When conventional brake lost efficacy, gear oil piston can promote the second chamber piston push rod assembly to build pressure under the effect of feel analog composite spring.
As preferably, the second chamber piston push rod assembly is made up of the second piston of band push rod and the gear oil piston being arranged on the 3rd intracavity, push rod and gear oil piston contact；Push rod and the second piston are one-body molded or be threaded connection.Having an advantage in that, push rod and gear oil piston insubstantial connect, and are only contact, thus realize coupling and decoupling of master cylinder and pedal analogue unit place chamber.
As preferably, the first chamber is identical with the diameter in the second chamber, and the diameter in the 3rd chamber is more than the first chamber and the diameter in the second chamber.Having an advantage in that, the fluid volume excursion in the 3rd chamber is big, can coordinate the setting of gear oil piston simultaneously.
As preferably, the first chamber is connected with the near front wheel wheel cylinder and off hind wheel wheel cylinder respectively, and the second chamber is connected with off-front wheel wheel cylinder and left rear wheel wheel cylinder respectively, and the 3rd chamber is connected with plunger displacement pump by conventional brake pattern switching valve.Have an advantage in that, shorten setting up the time of oil pressure at wheel wheel cylinder, improve promptness and the safety of braking.
As preferably, pedal feel analogue unit is composed in series by feel analog composite spring, pedal simulator piston push rod assembly, pedal feel analogue unit is connected with brake pedal, and the chamber at pedal feel analogue unit place is connected with spring type mechanical accumulator by alternate brake switching valve.Having an advantage in that, spring type mechanical accumulator can store certain fluid, plays a role when conventional brake and abs mode.
As preferably, brake pedal is connected through the hinge with pedal simulator piston push rod assembly, and pedal simulator piston push rod assembly is connected with feel analog composite spring, and spring type mechanical accumulator is threaded in the outside of pedal analogue unit by alternate brake switching valve.
As preferably, the flexible member of feel analog composite spring is formed by three sections of springs are compound, and three sections of springs work respectively under different piston displacements.Having an advantage in that, syllogic spring can realize the simulation of feel by the cooperating under different pedal displacement；Certain fluid can be stored at spring type mechanical accumulator, to adapt in various damped conditions, the fluid volume change of pedal sense simulator place chamber.
As preferably, four groups of draining electromagnetic valves in foundation brake assembly are connected with fluid reservoir with parallel way, and are connected with four groups of wheel cylinders respectively；Four groups of oil-feed electromagnetic valves are connected with fluid reservoir or master cylinder with parallel way, and are connected with four groups of wheel cylinders respectively.Having an advantage in that, four groups of inlet valves are connected with oil storage tank 9 in parallel, and are divided into two groups and are connected with the different chamber of master cylinder respectively, such that it is able to accept the hydraulic oil from two oil circuits.When conventional brake, fluid is essentially from master cylinder；Under abs mode, fluid is directly provided by plunger displacement pump, and the switching of both operating mode completes with abs mode switching valve and normal mode switching valve.
As preferably, brake pedal displacement transducer is integrally disposed on brake pedal, and master cylinder pressure sensor is arranged in the outlet line of master cylinder, and four groups of Wheel cylinder pressure sensors are respectively arranged among four groups of wheel cylinders.Have an advantage in that, substantially reduce the volume of whole hydraulic control unit.
As preferably, executor's integration module, ECU controller and spring type mechanical accumulator are integrated into an entirety.Having an advantage in that, master cylinder assembly and pedal analogue unit etc. are integrated into an integral valve block, and oil cylinder, plunger displacement pump, motor and electromagnetic valve etc. are respectively mounted with on valve block, substantially reduce installation volume, also reduce the risk of hydraulic oil seepage.
As preferably, braking mode switching valve is the switching solenoid valve controlled by PWM, or the linear solenoid valve of position feedback control.Having an advantage in that, pattern switching solenoid valve can be the linear solenoid valve of simple switch valve or position feedback control, and the latter can be with the aperture of Linear regulating valve and feed back aperture position.
This utility model compared with the existing technology has the following advantages and effect:
1, it is integrated into an entirety due to executor's integration module and ECU controller, reduces installation volume, reduce processing cost.
2, owing to using switching valve group independently to realize three kinds of braking modes: conventional brake, alternate brake and ABS function, wherein conventional brake includes that artificial foot steps on braking with system from main brake, meanwhile, can assist again entire car controller is to receive active/auxiliary braking and braking energy recovering function.
3, due to pedal analogue unit to driver feedback pedal sense, when thrashing when, brake pedal then can be connected with master cylinder push rod automatically, provides certain hydraulic coupling for wheel cylinder, it is achieved machinery alternate brake.
4, owing to having abandoned electric-motor pump and the pattern of high pressure accumulator cooperation, the supercharging of oil circuit is realized with single motor；Meanwhile, the cooperation of electric-motor pump and electromagnetic valve is utilized, on the premise of not installing ABS module additional, it is possible to realize ABS anti-locking brake function.
Accompanying drawing explanation
In order to be illustrated more clearly that this utility model embodiment or technical scheme of the prior art, the accompanying drawing used required in embodiment or description of the prior art will be briefly described below, apparently, accompanying drawing in describing below is only embodiments more of the present utility model, for those of ordinary skill in the art, on the premise of not paying creative work, it is also possible to obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is structural representation of the present utility model.
Fig. 2 is operating diagram during this utility model conventional brake.
Fig. 3 is operating diagram during this utility model machinery alternate brake.
Fig. 4 is the schematic diagram that this utility model realizes abs braking function.
Fig. 5 is the schematic diagram that this utility model realizes active/auxiliary brake function.
Label declaration:
1, brake pedal；2, feel analog composite spring；3, pedal simulator piston push rod assembly；4, abs mode switching valve；5, normal mode switching valve；6, plunger displacement pump；7, motor；8, the second chamber；9, oil storage tank；10, the first chamber；11, the first chamber return spring；12, master cylinder pressure sensor；13, the near front wheel wheel cylinder；14, off hind wheel wheel cylinder；15, off-front wheel wheel cylinder；16, left rear wheel wheel cylinder；17, left rear wheel gate gurgle valve；18, left rear wheel inlet valve；19, left rear wheel Wheel cylinder pressure sensors；20, off-front wheel gate gurgle valve；21, off-front wheel inlet valve；22, off-front wheel Wheel cylinder pressure sensors；23, off hind wheel gate gurgle valve；24, off hind wheel inlet valve；25, off hind wheel Wheel cylinder pressure sensors；26, the near front wheel gate gurgle valve；27, the near front wheel inlet valve；28, the near front wheel Wheel cylinder pressure sensors；29, first piston；30, the second chamber return spring；31, the second chamber piston push rod assembly；32, spring type mechanical accumulator；33, alternate brake switching valve；34, the 3rd chamber；35, gear oil piston；36, tapping valve；37, executor's integration module；38, foundation brake assembly；39, pedal displacement sensor；40, ECU controller；41, entire car controller；42, left front wheel speed sensors；43, off-front wheel speed sensor；44, left back wheel speed sensors；45, speed sensor behind the right side.
Detailed description of the invention
Being described in further detail this utility model below in conjunction with embodiment, following example are that this utility model is not limited to following example to explanation of the present utility model.
Embodiment 1:
As it is shown in figure 1, the present embodiment is structurally divided into five major parts: by executor's integration module 37, foundation brake assembly 38, ECU controller 40, actuation unit and spring type mechanical accumulator 32；Braked channel has three: conventional brake path, alternate brake path and abs braking path.
Executor's integration module 37 is made up of pedal feel analogue unit, master cylinder assembly, electro-hydraulic power-assisted unit, braking mode switching valve, master cylinder pressure sensor 12, tapping valve 36 and fluid reservoir 9.Master cylinder pressure sensor 12 is arranged in the outlet line of master cylinder；Tapping valve 36 connects the 3rd chamber 34 and the fluid reservoir 9 of master cylinder, and the path that tapping valve 36 connects with fluid reservoir 9 also has a branch road, connected drainage valve 36, plunger displacement pump 6, normal mode switching valve 5 and the 3rd chamber 34 of master cylinder；Fluid reservoir 9 is connected with master cylinder and foundation brake assembly 38 respectively.
Pedal feel analogue unit is made up of feel analog composite spring 2, pedal simulator piston push rod assembly 3, and feel analog composite spring 2 and pedal simulator piston push rod assembly 3 connect in a series arrangement.As it is shown in figure 1, pedal feel analogue unit is provided with a fluid chamber, this fluid chamber connects with master cylinder, realizes coupling and decoupling with master cylinder by gear oil piston 35；Feel analog composite spring 2 and pedal simulator piston push rod assembly 3 are arranged at this oil chamber.
The flexible member of feel analog composite spring 2 is formed by three sections of springs are compound, and three sections of springs work respectively under different piston displacements.
Spring type mechanical accumulator 32 is connected to the outside of pedal analogue unit threadably by alternate brake switching valve 33, in order to store under non-failed situation the hydraulic oil at pedal analogue unit intracavity；The fluid chamber at pedal analogue unit place is connected with spring type mechanical accumulator 32 by alternate brake switching valve 33.
Actuation unit is made up of interconnective brake pedal 1 and brake pedal displacement transducer 39, the braking maneuver of driver be transferred to master cylinder in time accepting artificial braking mode；The stroke of monitoring brake pedal 1, thus judge its driving intention.Brake pedal 1 is hinged on pedal simulator piston push rod assembly 3.The push rod of pedal simulator piston push rod assembly 3 is connected with brake pedal 1, and brake pedal displacement transducer 39 is integrally disposed on brake pedal 1.
Braking mode switching valve is made up of conventional brake pattern switching valve 5, abs mode switching valve 4 and alternate brake switching valve 33, it is mainly according to the transport condition of vehicle, identify the damped condition being presently in, carry out three kinds of braking mode switchings in good time, enable the vehicle to be braked with security and stability.Conventional brake pattern switching valve 5 one end connects the 3rd chamber 34 of master cylinder, and the other end connects abs mode switching valve 4 and plunger displacement pump 6；Abs mode switching valve 4 one end connects plunger displacement pump 6 and conventional brake pattern switching valve 5, and the other end connects 4 groups of wheel cylinders by 4 groups of inlet valves, and connects the first chamber 10 and the second chamber 8 of master cylinder.Alternate brake switching valve 33 is arranged between pedal analogue unit and spring type mechanical accumulator 32.
Electro-hydraulic power-assisted unit is made up of motor 7 and plunger displacement pump 6, and motor 7 and plunger displacement pump 6 interconnect, at first in the 3rd chamber 34 built-in erection system hydraulic coupling to be braked.In the present embodiment, abandoned high pressure accumulator, and used electro-hydraulic power-assisted unit to realize the supercharging of oil circuit, reduced cost, simplify structure, it also avoid the safety issue that service life, defect was brought of high pressure accumulator simultaneously.
Master cylinder assembly is made up of first chamber the 10, first chamber return spring 11, piston push rod assembly the 31, the 3rd chamber 34, the 8, second chamber return spring the 30, second chamber, first piston the 29, second chamber and gear oil piston 35.First chamber 10 is connected with the near front wheel wheel cylinder 13 and off hind wheel wheel cylinder 14, and the second chamber 8 is connected with off-front wheel wheel cylinder 15 and left rear wheel wheel cylinder 16, and the 3rd chamber 34 is connected with plunger displacement pump 6.
First piston 29 is identical with the second piston diameter, and the diameter of gear oil piston 35 is more than first piston 29 and the diameter of the second piston；First chamber 10 is identical with the diameter in the second chamber 8, and the diameter in the 3rd chamber 34 is more than the first chamber 10 and diameter in the second chamber 8.The diameter of three chambers is not quite similar, it is that the second chamber piston push rod assembly 31 and gear oil piston 35 are installed, and when making conventional brake, gear oil piston 35 is crushed on the bottom in the 3rd chamber 34, thus the chamber isolation in master cylinder the 3rd chamber 34 with pedal analogue unit place is separated；When conventional brake lost efficacy, gear oil piston 35 can promote the second chamber piston push rod assembly 31 to build pressure under the effect of feel analog composite spring 2.
First chamber return spring 11 is arranged in the first chamber 10, and connects bottom master cylinder and first piston 29；Second chamber return spring 30 is arranged in the second chamber 8, and connects first piston 29 and the second chamber piston push rod assembly 31.Second chamber piston push rod assembly 31 is made up of the second piston of band push rod and the gear oil piston 35 being arranged in the 3rd chamber 34.Push rod can be connected can also disconnect with gear oil piston 35, is contact relation when connecting, mutually disconnects both when disconnecting.Push rod and the second piston are made of one or are threaded connection.
Foundation brake assembly 38 is by four groups of wheel cylinders, Wheel cylinder pressure sensors, oil-feed or draining electromagnetic valve and wheel speed sensors form, specifically include: the near front wheel wheel cylinder 13, off hind wheel wheel cylinder 14, off-front wheel wheel cylinder 15, left rear wheel wheel cylinder 16, left rear wheel gate gurgle valve 17, left rear wheel inlet valve 18, left rear wheel Wheel cylinder pressure sensors 19, off-front wheel gate gurgle valve 20, off-front wheel inlet valve 21, off-front wheel Wheel cylinder pressure sensors 22, off hind wheel gate gurgle valve 23, off hind wheel inlet valve 24, off hind wheel Wheel cylinder pressure sensors 25, the near front wheel gate gurgle valve 26, the near front wheel inlet valve 27, the near front wheel Wheel cylinder pressure sensors 28, left front wheel speed sensors 42, off-front wheel speed sensor 43, left back wheel speed sensors 44, speed sensor 45 behind the right side.For receiving the hydraulic coupling from master cylinder, produce corresponding wheel braking force；Can also directly connect plunger displacement pump 6, wheel is braked.Four groups of Wheel cylinder pressure sensors are respectively arranged among four groups of wheel cylinders.
Each wheel cylinder is each configured with inlet valve and gate gurgle valve, and four groups of inlet valves are connected with oil storage tank 9 in parallel, and is divided into two groups and is connected with the different chamber of master cylinder respectively, such that it is able to accept the hydraulic oil from two oil circuits.When conventional brake, fluid, essentially from master cylinder, produces corresponding wheel braking force；Under abs mode, fluid is directly provided by plunger displacement pump 6, and the switching of both operating mode completes with abs mode switching valve 4 and normal mode switching valve 5.
Hydraulic coupling sensor it is equipped with, in order to gather the pressure of each wheel cylinder, in order to be tracked controlling to it at each wheel cylinder.Each oil-feed/draining electromagnetic valve is connected with master cylinder and plunger displacement pump 6 by brake piping, regulation motor 7 and the duty of each electromagnetic valve and pressure of wheel braking cylinder, it is possible to realize pressure of wheel braking cylinder distribution function.
First chamber 10 is connected with the near front wheel wheel cylinder 13, off hind wheel wheel cylinder 14 by the near front wheel inlet valve 27, off hind wheel inlet valve 24 respectively；Second chamber 8 respectively by 21, left rear wheel inlet valve 18 be connected with off-front wheel wheel cylinder 15, left rear wheel wheel cylinder 16, the 10, second chamber 8, the first chamber is connected with oil storage tank 9 the most respectively；3rd chamber 34 is connected with plunger displacement pump 6 by conventional brake pattern switching valve 5.
Master cylinder pressure sensor 12, brake pedal displacement transducer 39 and four groups of Wheel cylinder pressure sensors are connected with described ECU controller 40 signal respectively.
As shown in Figure 2, conventional brake path includes, pedal feel analogue unit, spring type mechanical accumulator 32, brake pedal 1, alternate brake switching valve 33, motor 7, fluid reservoir 9, plunger displacement pump 6, conventional brake pattern switching valve 5, master cylinder assembly and foundation brake assembly 38.
When conventional brake, normal mode switching valve 5 energising conducting, the switching valve of remaining pattern is in off-position.Displacement signal when brake pedal 1 is operated by pedal displacement sensor 39 is transferred to controller, controller is according to the size of displacement, the target of given master cylinder this moment builds pressure value, motor 7, plunger displacement pump 6 and tapping valve 36 and master cylinder pressure sensor 12 work, the oil now pumped out by plunger displacement pump 6 via normal mode switching solenoid valve 5 introduces the 3rd chamber 34, form high pressure, promoting the second piston 31 and first piston 29 successively to build pressure in the second chamber 8 and the first chamber 10, pressure is delivered to wheel cylinder by fluid pressure line and realizes wheel braking.This is engraved in pedal analogue unit chamber is relatively low pressure, and therefore rear terminal block oil piston 35 is pressed on bottom the 3rd chamber 34 by the high pressure in the 3rd chamber 34, and in pedal analogue unit, the hydraulic oil of compression enters in spring type mechanical accumulator 32 via alternate brake switching solenoid valve 33.By the double-piston push-rod assembly of this breakaway-element, it is achieved that master cylinder and the decoupling of pedal analogue unit, make master cylinder and pedal analogue unit individually build pressure, be independent of each other.Whole build pressure during, actual pressure that master cylinder pressure sensor 12 records and goal pressure are done difference and are compared, and control plunger displacement pump 6 and the work of valve, it is achieved feedback control.
As it is shown on figure 3, alternate brake path includes, brake pedal 1, pedal feel analogue unit, master cylinder assembly and foundation brake assembly 38.
When alternate brake, alternate brake, according to the state of vehicle, is switched valve 33 and is energized disconnection by controller, and the switching valve of remaining pattern is for off-position.Plunger displacement pump 6, motor 7 are in failure state, now the 3rd chamber 34 do not has pressure, hydraulic oil in pedal analogue unit is closed in intracavity, owing to the compressibility of hydraulic oil is the least, pedal analogue unit becomes with master cylinder and is rigidly connected, hydraulic oil in pedal analogue unit chamber promotes gear oil piston 35 and the pushrod movement of the second piston push rod assembly 31, under the effect of push rod, second piston 31 and first piston 29 move therewith, pressure is built in the second chamber 8 and the first chamber 10, pressure is delivered to wheel cylinder by fluid pressure line, it is achieved car braking.
As shown in Figure 4, abs braking path includes, pedal feel analogue unit, spring type mechanical accumulator 32, brake pedal 1, alternate brake switching valve 33, motor 7, fluid reservoir 9, plunger displacement pump 6, abs mode switching valve 4 and foundation brake assembly 38.
When abs braking, controller, according to receiving the wheel speed signal of speed, calculates the slip rate of wheel, and abs mode switching valve 4 energising conducting, the switching valve of remaining pattern is all in off-position.Now, the oil that plunger displacement pump 6 pumps out does not enters back in master cylinder, but is directly entered four wheel cylinders 13,14,15,16 via abs mode switching valve 4.Each wheel cylinder has an inlet valve and gate gurgle valve respectively, and when wheel cylinder needs supercharging, inlet valve is opened, and gate gurgle valve is closed；When wheel cylinder needs pressurize, inlet valve and gate gurgle valve are turned off；When wheel cylinder needs decompression, inlet valve cuts out, and gate gurgle valve is opened.This version can realize the pressure of each wheel cylinder and individually control, and is independent of each other.During whole ABS controls, controller is compared by the difference of doing of calculated actual slip rate and target slip ratio, and the pressure of wheel cylinder is carried out feedback control.
Flexible member in pedal analogue unit be in order to simulating brake during braking feel.It is positioned at pedal analogue unit intracavity, and feel analog composite spring 2 is formed by three sections of springs are compound, and these three sections of springs are operated in the different piston displacement stages respectively.Spring rate expression formula is as follows:
In formula, i is the stage i=1 of spring-compressed, 2,3, kiIt it is the complex spring equivalent stiffness at different compression stages.L1、L2And L3It is respectively the displacement of piston.
The direction of arrow in Fig. 2, Fig. 3, Fig. 4 represents the direction of motion of fluid.
As shown in Figure 5, when active/auxiliary braking, the ECU controller 40 of the present embodiment accepts, by CAN, the expection braking deceleration instruction that entire car controller 41 is sent, and is scaled master cylinder pressure desired value, drive plunger displacement pump 6 to carry out system and build pressure, regulate in real time according to master cylinder pressure signal；And combine different damped conditions, send valve control instruction and be braked the switching of pattern；The signal of four wheel speed sensors 42,43,44,45 is processed, it is judged that vehicle speed condition, it is achieved closed loop control.When pedal displacement acquisition of signal is to when having manual intervention, and system exits actively braking mode, hand control brake.The on-position information collected can be sent to CAN line for the reading of car load equipment by the ECU controller 40 of the present embodiment.
Embodiment 2:
The present embodiment is similar to Example 1, and it the difference is that only:
1, in addition to brake pedal 1, pedal displacement sensor 39 and foundation brake assembly 38, remainder can be integrated into an entirety；Build the mode that the motor 7 used by pressure is threaded connection to be fixedly arranged on the valve body of master cylinder.
2, braking mode switching valve is the switching solenoid valve controlled by PWM, or the linear solenoid valve of position feedback control.
Master cylinder assembly and pedal analogue unit etc. are integrated into an integral valve block, and oil cylinder, plunger displacement pump 6, motor 7 and electromagnetic valve etc. are mounted on valve block, substantially reduce installation volume, also reduce the risk of hydraulic oil seepage；Switching solenoid valve is simple switch valve, and the linear solenoid valve of position feedback control can be with the aperture of Linear regulating valve and feed back aperture position.
Integrated electric control hydraulic braking system of the present utility model can apply to conventional fuel oil automobile, the SUV large-scale for some and picking-up vehicle, owing to the restriction of traditional vacuum booster size cannot break through again, and use this utility model can realize preferable braking ability and pedal sense, it is possible to meet the speed dynamic braking response requirement of driver assistance system；Be particularly suited for not relying on vacuum source new energy vehicle and be capable of active/auxiliary brake function drive vehicle from kinetic energy, when this utility model is applied to new energy vehicle, the braking feel of orthodox car can be simulated, each wheel cylinder can individually be controlled by ECU, it is also possible to assists car load to realize Brake energy recovery；When this utility model is applied to automatic driving vehicle, it is possible to realize the function of actively braking.
This utility model enormously simplify the structure of brakes, saves installing space, reduces cost；Faster system response, control accurately, can the braking intention of accurate response driver, and provide comfortable pedal sense when artificial braking；Integrated level and function are obviously enhanced, and ensure traffic safety when thrashing.The ECU controller 40 of native system can assist in entire car controller 41 and realizes from main brake and regenerative braking capability；Meanwhile, native system is as the active brake actuator of bottom, it is possible to the electric-control system of integrated various functions, such as EPB/ESC/ACC etc..
This utility model has been abandoned traditional plunger displacement pump 6 and has been coordinated the form of high pressure accumulator, has evaded the high pressure accumulator system problem that service life, deficiency was brought dexterously.Meanwhile, master cylinder assembly and pedal analogue unit etc. are integrated into an integral valve block by this utility model, oil cylinder, and plunger displacement pump 6 and electromagnetic valve etc. are mounted on valve block, reduce installation volume, reduce processing cost, decrease the risk of hydraulic oil seepage；Can independently realize three kinds of braking modes: conventional brake, alternate brake and ABS function, wherein conventional brake includes that artificial foot steps on braking with system from main brake.Pedal analogue unit is pedal sense to driver feedback, and when thrashing when, brake pedal 1 then can be connected with master cylinder push rod automatically, provides certain hydraulic coupling for wheel cylinder, it is achieved machinery alternate brake；This utility model has abandoned plunger displacement pump 6 and the pattern of high pressure accumulator cooperation, realizes the supercharging of oil circuit with single motor 7；Meanwhile, the cooperation of plunger displacement pump 7 and electromagnetic valve is utilized, on the premise of not installing ABS module additional, it is possible to realize ABS anti-locking brake function.
This utility model need not original brakes is made a lot of changes, and the numerous parts of system can be continued to use by carrying out based on traditional design, saves the design and manufacture cost of part.
Of the present utility model simple for structure, application module (ABS, ESC etc.) all can use for reference ripe design, can be applied not only to tradition riding vehicle, and is particularly suited for the brakes of all kinds of new-energy automobile.Overturn the design concept of traditional vacuum energy assisted braking system, level of integrated system and function to be obviously enhanced.
This utility model compared with the existing technology has the following advantages and effect:
1, it is integrated into an entirety due to executor's integration module 37 and ECU controller 40, reduces installation volume, reduce processing cost.
2, owing to using switching valve group independently to realize three kinds of braking modes: conventional brake, alternate brake and ABS function, wherein conventional brake includes that artificial foot steps on braking with system from main brake, meanwhile, can assist again entire car controller 41 is to receive active/auxiliary braking and braking energy recovering function.
3, due to pedal analogue unit to driver feedback pedal sense, when thrashing when, brake pedal 1 then can be connected with master cylinder push rod automatically, provides certain hydraulic coupling for wheel cylinder, it is achieved machinery alternate brake.
4, owing to having abandoned plunger displacement pump 6 and the pattern of high pressure accumulator cooperation, the supercharging of oil circuit is realized with single motor 7；Meanwhile, the cooperation of plunger displacement pump 6 and electromagnetic valve is utilized, on the premise of not installing ABS module additional, it is possible to realize ABS anti-locking brake function.
Furthermore, it is necessary to illustrate, the specific embodiment described in this specification, the shape of its parts and components, be named title etc. can be different.All equivalences done according to structure, feature and the principle described in this utility model inventional idea or simple change, be all included in the protection domain of this utility model patent.Described specific embodiment can be made various amendment or supplements or use similar mode to substitute by this utility model person of ordinary skill in the field; without departing from structure of the present utility model or surmount scope defined in the claims, protection domain of the present utility model all should be belonged to.
Claims (12)
1. a vehicle integrated electric control hydraulic braking system, is characterized in that: be made up of executor's integration module (37), foundation brake assembly (38), ECU controller (40), actuation unit and spring type mechanical accumulator (32)；
Described executor's integration module (37) is made up of pedal feel analogue unit, spring type mechanical accumulator (32), master cylinder assembly, electro-hydraulic power-assisted unit, braking mode switching valve, master cylinder pressure sensor (12), tapping valve (36) and fluid reservoir (9), described electro-hydraulic power-assisted unit is made up of the motor (7) interconnected and plunger displacement pump (6), and described braking mode switching valve is made up of conventional brake pattern switching valve (5), abs mode switching valve (4) and alternate brake switching valve (33)；
Described foundation brake assembly (38) is made up of four groups of wheel cylinders, Wheel cylinder pressure sensors, oil-feed electromagnetic valve, draining electromagnetic valve and wheel speed sensors；
Described actuation unit is made up of interconnective brake pedal (1) and brake pedal displacement transducer (39)；
Described pedal feel analogue unit, brake pedal (1), brake switching valve (33) and spring type mechanical accumulator (32), the described motor (7) being connected with plunger displacement pump (6), and described fluid reservoir (9), plunger displacement pump (6), conventional brake pattern switching valve (5), master cylinder assembly and the foundation brake assembly (38) being sequentially connected with, form conventional brake path；
Described brake pedal (1), pedal feel analogue unit, master cylinder assembly and the foundation brake assembly (38) being sequentially connected with, forms alternate brake path；
Described pedal feel analogue unit, brake pedal (1), brake switching valve (33) and spring type mechanical accumulator (32), the described motor (7) being connected with plunger displacement pump (6), and described fluid reservoir (9), plunger displacement pump (6), abs mode switching valve (4) and the foundation brake assembly (38) being sequentially connected with, form abs braking path；
Described master cylinder pressure sensor (12), brake pedal displacement transducer (39) and four groups of Wheel cylinder pressure sensors are connected with described ECU controller (40) signal respectively.
A kind of vehicle integrated electric control hydraulic braking system the most according to claim 1, is characterized in that: described master cylinder assembly is made up of the first chamber (10), the first chamber return spring (11), first piston (29), the second chamber (8), the second chamber return spring (30), the second chamber piston push rod assembly (31), the 3rd chamber (34) and gear oil piston (35)；The first described chamber return spring (11) is arranged in the first chamber (10), and connects bottom master cylinder and first piston (29)；The second described chamber return spring (30) is arranged in the second chamber (8), and connects first piston (29) and the second chamber piston push rod assembly (31).
A kind of vehicle integrated electric control hydraulic braking system the most according to claim 2, it is characterized in that: the second described chamber piston push rod assembly (31) is made up of the second piston of band push rod and gear oil piston (35) being arranged in the 3rd chamber (34), described push rod contacts with gear oil piston (35)；Described push rod and the second piston are one-body molded or be threaded connection.
A kind of vehicle integrated electric control hydraulic braking system the most according to claim 2, it is characterized in that: described the first chamber (10) is identical with the diameter of the second chamber (8), the diameter in described 3rd chamber (34) is more than described first chamber (10) and the diameter of the second chamber (8).
A kind of vehicle integrated electric control hydraulic braking system the most according to claim 2, it is characterized in that: described the first chamber (10) is connected with the near front wheel wheel cylinder (13) and off hind wheel wheel cylinder (14) respectively, described the second chamber (30) is connected with off-front wheel wheel cylinder (15) and left rear wheel wheel cylinder (16) respectively, and the 3rd described chamber (34) is connected with plunger displacement pump (6) by conventional brake pattern switching valve (5).
A kind of vehicle integrated electric control hydraulic braking system the most according to claim 1, it is characterized in that: described pedal feel analogue unit is composed in series by feel analog composite spring (2), pedal simulator piston push rod assembly (3), described pedal feel analogue unit is connected with brake pedal (1), and the chamber at described pedal feel analogue unit place is connected with spring type mechanical accumulator (32) by alternate brake switching valve (33).
A kind of vehicle integrated electric control hydraulic braking system the most according to claim 6, it is characterized in that: described brake pedal (1) is connected through the hinge with pedal simulator piston push rod assembly (3), described pedal simulator piston push rod assembly (3) is connected with feel analog composite spring (2), and described spring type mechanical accumulator (32) is threaded in the outside of described pedal analogue unit by described alternate brake switching valve (33).
A kind of vehicle integrated electric control hydraulic braking system the most according to claim 7, it is characterised in that: the flexible member of described feel analog composite spring (2) is formed by three sections of springs are compound, and three sections of springs work respectively under different piston displacements.
A kind of vehicle integrated electric control hydraulic braking system the most according to claim 1, it is characterized in that: described four groups of draining electromagnetic valves in foundation brake assembly (38) are connected with described fluid reservoir (9) with parallel way, and are connected with described four groups of wheel cylinders respectively；Four groups of described oil-feed electromagnetic valves are connected with described fluid reservoir (9) or master cylinder with parallel way, and are connected with described four groups of wheel cylinders respectively.
A kind of vehicle integrated electric control hydraulic braking system the most according to claim 1, it is characterized in that: described brake pedal displacement transducer (39) is integrally disposed on described brake pedal (1), described master cylinder pressure sensor (12) is arranged in the outlet line of master cylinder, and described four groups of Wheel cylinder pressure sensors are respectively arranged among four groups of wheel cylinders.
11. a kind of vehicle integrated electric control hydraulic braking systems according to claim 1, is characterized in that: described executor's integration module (37), ECU controller (40) and spring type mechanical accumulator (32) are integrated into an entirety.
12. a kind of vehicle integrated electric control hydraulic braking systems according to claim 1, is characterized in that: described braking mode switching valve is the switching solenoid valve controlled by PWM, or the linear solenoid valve of position feedback control.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520318047.2U CN205417597U (en) | 2015-05-18 | 2015-05-18 | Integrated automatically controlled hydraulic braking system of vehicle |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520318047.2U CN205417597U (en) | 2015-05-18 | 2015-05-18 | Integrated automatically controlled hydraulic braking system of vehicle |
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| CN205417597U true CN205417597U (en) | 2016-08-03 |
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| CN201520318047.2U Expired - Fee Related CN205417597U (en) | 2015-05-18 | 2015-05-18 | Integrated automatically controlled hydraulic braking system of vehicle |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104859625A (en) * | 2015-05-18 | 2015-08-26 | 浙江万向精工有限公司 | Vehicle integrated electro-hydraulic brake (EHB) system |
| CN106740764A (en) * | 2016-12-30 | 2017-05-31 | 中国科学院合肥物质科学研究院 | A kind of automatic driving vehicle braking control system and method |
| CN108032851A (en) * | 2018-01-08 | 2018-05-15 | 吉林大学 | A kind of brake pedal travel simulator and its control method |
| CN112824173A (en) * | 2019-11-21 | 2021-05-21 | 华为技术有限公司 | Hydraulic adjusting unit in automobile braking system, automobile and control method |
-
2015
- 2015-05-18 CN CN201520318047.2U patent/CN205417597U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104859625A (en) * | 2015-05-18 | 2015-08-26 | 浙江万向精工有限公司 | Vehicle integrated electro-hydraulic brake (EHB) system |
| CN106740764A (en) * | 2016-12-30 | 2017-05-31 | 中国科学院合肥物质科学研究院 | A kind of automatic driving vehicle braking control system and method |
| CN106740764B (en) * | 2016-12-30 | 2019-03-12 | 中国科学院合肥物质科学研究院 | A kind of automatic driving vehicle braking control system and method |
| CN108032851A (en) * | 2018-01-08 | 2018-05-15 | 吉林大学 | A kind of brake pedal travel simulator and its control method |
| CN108032851B (en) * | 2018-01-08 | 2024-01-02 | 吉林大学 | Brake pedal stroke simulator and control method thereof |
| CN112824173A (en) * | 2019-11-21 | 2021-05-21 | 华为技术有限公司 | Hydraulic adjusting unit in automobile braking system, automobile and control method |
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