CN102582605A - Automotive distributed electronic hydraulic braking system with pressure retaining valves - Google Patents
Automotive distributed electronic hydraulic braking system with pressure retaining valves Download PDFInfo
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- CN102582605A CN102582605A CN2012100845282A CN201210084528A CN102582605A CN 102582605 A CN102582605 A CN 102582605A CN 2012100845282 A CN2012100845282 A CN 2012100845282A CN 201210084528 A CN201210084528 A CN 201210084528A CN 102582605 A CN102582605 A CN 102582605A
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Abstract
The invention relates to an automotive distributed electronic hydraulic braking system with pressure retaining valves, which belongs to the technical field of automobile braking systems, and comprises a braking operation unit, an electromagnetic valve block, a pedal feeling simulator, a left front wheel braking actuating mechanism, a left front brake, a left front pressure retaining valve, a right front wheel braking actuating mechanism, a right front brake, a right front pressure retaining valve, a left rear wheel braking actuating mechanism, a left rear brake, a left rear pressure retaining valve, a right rear wheel braking actuating mechanism, a right rear brake and a right rear pressure retaining valve. The automotive distributed electronic hydraulic braking system with the pressure retaining valves can avoid that an ESC (electronic stability control) system cannot perform braking interference when part of the wheel braking actuating mechanisms fails, and is beneficial to improvement on ESC interference effects when part of the wheel braking actuating mechanisms fails. Besides, when the wheel braking actuating mechanisms are used for establishing pressure of the brakes, the pressure of the brakes can be retained without continuously electrifying motors of the wheel braking actuating mechanisms, so that energy consumption is reduced.
Description
Technical field
The present invention relates to a kind of automobile distribution EHB that has pressure retaining valve, belong to the brake system of car technical field.
Background technology
Automobile distribution electro-hydraulic brake (hereinafter to be referred as DEHB) system is a kind of distributed, wet type line control brake system.The probability that distributed characteristics lost efficacy its all wheel braking actuating units simultaneously is less; The characteristics of wet type are brought two benefits: 1. make system be convenient to integrated reserve hydraulic brake system; So that all can't provide under the situation of braking force and can implement brake through the reserve hydraulic brake system at whole wheel braking actuating units; 2. being convenient to provides reconstruct braking mode flexibly through hydraulic Design under the situation that part wheel braking actuating unit lost efficacy; Implement through different reconstruct braking modes being compared with preferred, helping provides better reconstruct braking effect under the situation that part wheel braking actuating unit lost efficacy.ZL 200920110660.x has proposed the basic scheme of a kind of DEHB.The DEHB system comprises 1 electronic pedal unit in this scheme, is used to gather chaufeur braking intention and simulation pedal counter-force; 1 brake-by-wire controller is used for formulating controlled target and controlling 4 wheel braking actuating units according to sensor signal; 4 wheel braking actuating units, the pressure of each drg is controlled in the instruction that is used for the On-line Control movement controller down; Various sensors are used for the signal of collection vehicle and brake system, supply the brake-by-wire controller to formulate controlled target and use.This scheme does not have the reserve hydraulic brake system; All can't provide under the situation of braking force at whole wheel braking actuating units and can't implement braking; And the reconstruct braking mode that this scheme can provide under the situation that part wheel braking actuating unit lost efficacy is less, has influenced the effect of reconstruct braking.Patent application CN201110391204.9 has proposed a kind of distributed electronic hydraulic brake system that uses disconnecting valve; On the basis of ZL 200920110660.x scheme; Between two drgs of antero posterior axis, connect a normally closed isolation solenoid valve respectively, under the situation that part wheel braking actuating unit lost efficacy, reconstruct master mode more flexibly can be provided.But this scheme does not have the reserve hydraulic brake system yet, all can't provide under the situation of braking force at whole wheel braking actuating units and can't implement braking.
Summary of the invention
The objective of the invention is to overcome the deficiency of prior art; A kind of automobile distribution EHB that has pressure retaining valve is proposed; This system through electromagnetic valve piece integrated the reserve hydraulic brake system; Chaufeur all can't be provided under the situation of braking force at whole wheel braking actuating units, can implement braking through the reserve hydraulic brake system by the muscle power of self; This system also through the electromagnetic valve piece integrated the antero posterior axis balance cock; Under the situation that part wheel braking actuating unit lost efficacy, reconstruct braking mode flexibly can be provided, thereby help to improve the effect of system reconfiguration braking under the part wheel braking actuating unit failure conditions; This system is through using pressure retaining valve; The system that can guarantee is under the situation that part wheel braking actuating unit lost efficacy; Automobile electron stabilization property control system (hereinafter to be referred as ESC) can not occur and can't implement the situation of brake regulation, and help to improve the effect of ESC intervention in such cases; Through using pressure retaining valve, make this system in addition, needn't continue just can realize the pressurize of brake pressure, to cut down the consumption of energy to the electrical power of wheel braking actuating unit using the wheel braking actuating unit to set up under the situation of brake pressure.
The automobile distribution EHB that has pressure retaining valve that the present invention proposes comprises brake actuating unit, electromagnetic valve piece, pedal sense simulator, front left wheel brake actuator, left front brake, left front pressure retaining valve, right front wheel brake actuator, right front brake, right front pressure retaining valve, left back wheel braking actuating unit, left back drg, left back pressure retaining valve, right rear wheel brake actuator, right back drg, right back pressure retaining valve;
Described brake actuating unit is made up of master cylinder body, master cylinder ante-chamber piston, master cylinder back cavity piston, push rod and brake pedal; Master cylinder ante-chamber piston wherein places the front portion of master cylinder body; Form the master cylinder ante-chamber, master cylinder back cavity piston places the rear portion of master cylinder body, forms the master cylinder back cavity;
Described electromagnetic valve piece comprises left front electromagnetic valve, right front electromagnetic valve, left back electromagnetic valve, right back electromagnetic valve, pedal sense simulator electromagnetic valve, front axle balance cock and rear axle balance cock; Wherein said left front electromagnetic valve links to each other with described master cylinder ante-chamber through brake piping respectively with right front electromagnetic valve; Described left back electromagnetic valve, right back electromagnetic valve and pedal sense simulator electromagnetic valve link to each other with the master cylinder back cavity through brake piping respectively; The left and right outlet of described front axle balance cock links to each other with right front electromagnetic valve with left front electromagnetic valve through brake piping respectively, and the left and right outlet of described rear axle balance cock links to each other with right back electromagnetic valve with left back electromagnetic valve through brake piping respectively;
Described pedal sense simulator is made up of housing, piston and spring, and piston and spring are installed in the housing, and pedal sense simulator links to each other with the pedal sense simulator electromagnetic valve through brake piping;
Described front left wheel brake actuator, right front wheel brake actuator, left back wheel braking actuating unit are identical with the structure of right rear wheel brake actuator; Comprise motor, coupler, nut, screw mandrel and piston respectively; Described motor is installed on the housing of actuating unit; Screw mandrel, nut and piston be coaxial successively to be installed in the housing of actuating unit, and the space between piston and the shell end forms the braking sap cavity, and motor links to each other with screw mandrel through coupler; Wherein the braking sap cavity of front left wheel brake actuator links to each other with the master cylinder ante-chamber of left front electromagnetic valve and brake actuating unit through brake piping successively; The braking sap cavity of right front wheel brake actuator links to each other with the master cylinder ante-chamber of right front electromagnetic valve and brake actuating unit through brake piping successively; The braking sap cavity of left back wheel braking actuating unit links to each other with the master cylinder back cavity of left back electromagnetic valve and brake actuating unit through brake piping successively, and the braking sap cavity of right rear wheel brake actuator links to each other with the master cylinder back cavity of right back electromagnetic valve and brake actuating unit through brake piping successively;
Described left front brake links to each other with the braking sap cavity of described left front pressure retaining valve and front left wheel brake actuator through brake piping successively; Described right front brake links to each other with the braking sap cavity of described right front pressure retaining valve and right front wheel brake actuator through brake piping successively; Described left back drg links to each other with the braking sap cavity of described left back pressure retaining valve and left back wheel braking actuating unit through brake piping successively, and described right back drg links to each other with the braking sap cavity of described right back pressure retaining valve and right rear wheel brake actuator through brake piping successively.
The automobile distribution EHB that has pressure retaining valve that the present invention proposes; Its advantage is: this system through electromagnetic valve piece integrated the reserve hydraulic brake system; Chaufeur all can't be provided under the situation of braking force at whole wheel braking actuating units, can implement braking through the reserve hydraulic brake system by the muscle power of self; This system also through the electromagnetic valve piece integrated the antero posterior axis balance cock; Under the situation that part wheel braking actuating unit lost efficacy, reconstruct braking mode flexibly can be provided, thereby help to improve the effect of system reconfiguration braking under the part wheel braking actuating unit failure conditions; This system is through using pressure retaining valve, and the system that can guarantee the situation that the ESC system can't implement brake regulation can not occur under the situation that part wheel braking actuating unit lost efficacy, and helps to improve the effect of ESC intervention in such cases; Through using pressure retaining valve, make this system in addition, needn't continue just can realize the pressurize of brake pressure, to cut down the consumption of energy to the electrical power of wheel braking actuating unit using the wheel braking actuating unit to set up under the situation of brake pressure.
Description of drawings
Fig. 1 is the structural representation of the automobile distribution EHB that has pressure retaining valve of the present invention's proposition.
Fig. 2 is the structural representation of brake actuating unit 1 among Fig. 1.
Fig. 3 is the structural representation of front left wheel brake actuator among Fig. 1.
Among Fig. 1-Fig. 3,1 is brake actuating unit, and 11 is master cylinder body, and 12 is the master cylinder ante-chamber, and 13 is master cylinder ante-chamber piston, and 14 is the master cylinder back cavity, and 15 is master cylinder back cavity piston, and 16 is push rod, and 17 is brake pedal, and 18,19,110,111 and 112 is brake piping,
2 is the electromagnetic valve piece, and 21 is left front electromagnetic valve, and 22 is right front electromagnetic valve, and 23 is left back electromagnetic valve; 24 is right back electromagnetic valve, and 25 is the pedal sense simulator electromagnetic valve, and 26 is the front axle balance cock; 27 is the rear axle balance cock, and 28,29,210,211,212,213,214,215 and 216 is brake piping
3 is pedal sense simulator, and 31 is piston, and 32 is housing, and 33 is spring,
4 is the front left wheel brake actuator, and 41 is left front motor, and 42 is left front coupler, and 43 is left front nut; 44 is left front screw mandrel, and 45 is left front piston, and 46 is left front braking sap cavity; 47 is front left wheel brake actuator housing, and 48 is brake piping, and 49 is left front brake; 410 is left front pressure retaining valve, and 411 is brake piping
5 is the right front wheel brake actuator, and 51 is right front motor, and 52 is right front coupler, and 53 is right front nut; 54 is right front screw mandrel, and 55 is right front piston, and 56 is right front braking sap cavity; 57 is right front wheel brake actuator housing, and 58 is brake piping, and 59 is right front brake; 510 is right front pressure retaining valve, and 511 is brake piping
6 is left back wheel braking actuating unit, and 61 is left back motor, and 62 is left back coupler, and 63 is left back nut; 64 is left back screw mandrel, and 65 is left back piston, and 66 is left back braking sap cavity; 67 is left back wheel braking actuating unit housing, and 68 is brake piping, and 69 is left back drg; 610 is left back pressure retaining valve, and 611 is brake piping
7 is the right rear wheel brake actuator, and 71 is right back motor, and 72 is right back coupler; 73 is right back nut, and 74 is right back screw mandrel, and 75 is right back piston; 76 is right back braking sap cavity, and 77 is right rear wheel brake actuator housing, and 78 is brake piping; 79 is right back drg, and 710 is right back pressure retaining valve, and 711 is brake piping.
The specific embodiment
The automobile distribution EHB that has pressure retaining valve that the present invention proposes; Its structure is as shown in Figure 1, comprises brake actuating unit 1, electromagnetic valve piece 2, pedal sense simulator 3, front left wheel brake actuator 4, left front brake 49, left front pressure retaining valve 410, right front wheel brake actuator 5, right front brake 59, right front pressure retaining valve 510, left back wheel braking actuating unit 6, left back drg 69, left back pressure retaining valve 610, right rear wheel brake actuator 7, right back drg 79, right back pressure retaining valve 710;
Described brake actuating unit 1; Its structure is as shown in Figure 2; Be made up of master cylinder body 11, master cylinder ante-chamber piston 13, master cylinder back cavity piston 15, push rod 16 and brake pedal 17, master cylinder ante-chamber piston 13 wherein places the front portion of master cylinder body 11, forms master cylinder ante-chamber 12; Master cylinder back cavity piston 15 places the rear portion of master cylinder body 11, forms master cylinder back cavity 14;
Described electromagnetic valve piece 2 comprises left front electromagnetic valve 21, right front electromagnetic valve 22, left back electromagnetic valve 23, right back electromagnetic valve 24, pedal sense simulator electromagnetic valve 25, front axle balance cock 26 and rear axle balance cock 27; Wherein said left front electromagnetic valve 21 links to each other with described master cylinder ante-chamber 12 with 19 through brake piping 18 respectively with right front electromagnetic valve 22; Described left back electromagnetic valve 23, right back electromagnetic valve 24 link to each other with the master cylinder back cavity with 112 through brake piping 110,111 respectively with pedal sense simulator electromagnetic valve 25; The left and right outlet of described front axle balance cock 26 links to each other with right front electromagnetic valve 22 with left front electromagnetic valve 21 with 210 through brake piping 29 respectively, and the left and right outlet of described rear axle balance cock 27 links to each other with right back electromagnetic valve 24 with left back electromagnetic valve 23 with 214 through brake piping 213 respectively;
Described pedal sense simulator 3 is made up of housing 32, piston 31 and spring 33, and piston 31 is installed in the housing 32 with spring 33, and pedal sense simulator 3 links to each other with pedal sense simulator electromagnetic valve 25 through brake piping 216;
Described front left wheel brake actuator 4, right front wheel brake actuator 5, left back wheel braking actuating unit 6 are identical with the structure of right rear wheel brake actuator 7; Its structure is as shown in Figure 3; Comprise motor (parts 41,51,61,71 among Fig. 1), coupler (parts 42,52,62,72 among Fig. 1), nut ( parts 43,53,63,73 among Fig. 1), screw mandrel ( parts 44,54,64,74 among Fig. 1) and piston ( parts 45,55,65,75 among Fig. 1) respectively; Described motor is installed on the housing of actuating unit; Screw mandrel, nut and piston be coaxial successively to be installed in the housing of actuating unit; Space between piston and the shell end forms the braking sap cavity, and motor links to each other with screw mandrel through coupler; Wherein the braking sap cavity 46 of front left wheel brake actuator 4 links to each other with the master cylinder ante-chamber 12 of left front electromagnetic valve 21 and brake actuating unit with 18 through brake piping 28 successively; The braking sap cavity 56 of right front wheel brake actuator 5 links to each other with the master cylinder ante-chamber 12 of right front electromagnetic valve 22 and brake actuating unit with 19 through brake piping 211 successively; The braking sap cavity of left back wheel braking actuating unit 6 links to each other with the master cylinder back cavity 14 of left back electromagnetic valve 23 and brake actuating unit with 110 through brake piping 212 successively, and the braking sap cavity 76 of right rear wheel brake actuator 7 links to each other with the master cylinder back cavity 14 of right back electromagnetic valve 24 and brake actuating unit with 111 through brake piping 215 successively;
Described left front brake 49 links to each other with the braking sap cavity 46 of left front pressure retaining valve 410 and front left wheel brake actuator with 48 through brake piping 411 successively; Described right front brake 59 links to each other with the braking sap cavity 56 of right front pressure retaining valve 510 and right front wheel brake actuator with 58 through brake piping 511 successively; Described left back drg 69 links to each other with the braking sap cavity 66 of left back pressure retaining valve 610 and left back wheel braking actuating unit with 68 through brake piping 611 successively, and described right back drg 79 links to each other with the braking sap cavity 76 of right back pressure retaining valve 710 and right rear wheel brake actuator with 78 through brake piping 711 successively.
Below in conjunction with accompanying drawing, introduce the principle of work and the working process of the automobile distribution EHB that has pressure retaining valve of the present invention's proposition in detail:
The working process of the automobile distribution EHB that has pressure retaining valve that the present invention proposes is: behind the engine ignition, system powers on, and gets into cycle of operations.After cycle of operations begins, at first judge whether to need to implement braking.Implement braking if desired, then the control of access cycle, after control cycle finished, the work at present end cycle began next cycle of operations.If need not implement braking, then the work at present end cycle begins next cycle of operations.
The automobile distribution EHB that has pressure retaining valve of the present invention, the working process of its control cycle is: after control cycle begins, at first judge the state of each wheel braking actuating unit.The state of each wheel braking actuating unit can be divided into three kinds of situation: 1. each wheel braking actuating unit is normal; 2. all the wheel braking actuating unit all can't provide braking force; 3. part wheel braking actuating unit lost efficacy, and part wheel braking actuating unit is normal.If each wheel braking actuating unit is normal, then get into the brake-by-wire pattern; If all the wheel braking actuating unit all can't provide braking force, then get into reserve hydraulic braking pattern; Lost efficacy like fruit part wheel braking actuating unit, part wheel braking actuating unit is normal, then the reconstruct braking mode of entering part wheel braking actuating unit inefficacy.
The automobile distribution EHB that has pressure retaining valve that the present invention proposes, the working process of its brake-by-wire pattern is: judge at first whether brake pedal 17 is stepped on.If brake pedal 17 is stepped on by chaufeur; Then left front electromagnetic valve 21, right front electromagnetic valve 22, left back electromagnetic valve 23,24 energisings of right back electromagnetic valve are closed; 25 energisings of pedal sense simulator electromagnetic valve are opened, so that the pedal sense of pedal sense simulator 3 simulation traditional braking systems.Whether the break-make of front axle balance cock 26, rear axle balance cock 27 is whether need independently control decision by the pressure of coaxial left-right two drgs.If brake pedal 17 is stepped on and needed anti-skid brake system (hereinafter to be referred as the ABS) intervention, then front axle balance cock 26,27 energisings of rear axle balance cock are closed, so that each brake pressure is independently controlled.Under the situation that does not need ABS to intervene, to judge also whether front axle two drgs 49 and 59 goal pressure equate and whether rear axle two drgs 69 are equal with 79 goal pressure.This spindle balance valve keeps outage to open if coaxial two drg goal pressure equate; So that keep these axle two brake pressures to equate; This spindle balance valve energising is closed if coaxial two drg goal pressure do not wait, so that these axle two brake pressures are independently controlled.Left front pressure retaining valve 410, right front pressure retaining valve 510, left back pressure retaining valve 610 and right back pressure retaining valve 710 keep the outage open modes.Afterwards, through controlling the motor of each wheel braking actuating unit, just can realize the pressure control of each drg.If brake pedal 17 is not stepped on by chaufeur; Then judge in four drgs which need be under electronic stability controlling system (ESC) be intervened active boost; To need the cooresponding electromagnetic valve of drg of active boost then and need the drg place shaft balancing valve energising of active boost to close, so that need the pressure of the drg of active boost independently to control.Other electromagnetic valves keep off-position.Afterwards, need the motor of the pairing wheel braking actuating unit of drg of active boost, just can realize the intervention of ESC active boost through control.
Stepping on and carry out the ABS intervention with brake pedal 17 is example, and the working process of said brake-by-wire pattern is further explained.Because brake pedal 17 is stepped on by chaufeur; Left front electromagnetic valve 21, right front electromagnetic valve 22, left back electromagnetic valve 23,24 energisings of right back electromagnetic valve are closed; 25 energisings of pedal sense simulator electromagnetic valve are opened, so that the pedal sense of pedal sense simulator 3 simulation traditional braking systems.Owing to need anti-skid brake system (ABS) to intervene, thus front axle balance cock 26, rear axle balance cock 27 switch on and close so that each brake pressure is independently controlled.Left front pressure retaining valve 410, right front pressure retaining valve 510, left back pressure retaining valve 610 and right back pressure retaining valve 710 keep the outage open modes.Afterwards, through controlling the motor of each wheel braking actuating unit, just can realize the pressure control of each drg.
With brake pedal 17 be not operated and left side two drgs 49 and 69 to carry out the intervention of ESC active boost be example, the working process of said brake-by-wire pattern is further explained.Because brake pedal 17 is not operated; And left side two drgs 49 and 69 need carry out the intervention of ESC active boost; So front axle balance cock 26 energisings of left front brake 49 cooresponding left front electromagnetic valves 21 and left front brake 49 place axles are closed; And rear axle balance cock 27 energisings of left back drg 69 cooresponding left back electromagnetic valves 23 and left back drg 69 place axles are closed, so that the pressure of left front brake 49 and left back drg 69 can independently be controlled.Other electromagnetic valves keep off-position.Afterwards, through controlling left front motor 41 and left back motor 61, just can realize ESC active boost intervention to left front brake 49 and left back drg 69.
The working process of said reserve hydraulic braking pattern is: all electromagnetic valves keep outage; So said master cylinder ante-chamber 12 is communicated with said left front brake 49 through brake piping 18, the said left front electromagnetic valve 21, brake piping 28 that are in the outage open mode, said left front braking sap cavity 46, brake piping 48, the said left front pressure retaining valve 410 and the brake piping 411 that are in the outage open mode successively; Said master cylinder ante-chamber 12 is communicated with said right front brake 59 through brake piping 19, the said right front electromagnetic valve 22, brake piping 211 that are in the outage open mode, said right front braking sap cavity 56, brake piping 58, the said right front pressure retaining valve 510 and the brake piping 511 that are in the outage open mode successively; Said master cylinder back cavity 14 is communicated with said left back drg 69 through brake piping 110, the said left back electromagnetic valve 23, brake piping 212 that are in the outage open mode, said left back braking sap cavity 66, brake piping 68, the said left back pressure retaining valve 610 and the brake piping 611 that are in the outage open mode successively; Said master cylinder back cavity 14 is communicated with said right back drg 79 through brake piping 111, the said right back electromagnetic valve 24, brake piping 215 that are in the outage open mode, said right back braking sap cavity 76, brake piping 78, the said right back pressure retaining valve 710 and the brake piping 711 that are in the outage open mode successively, has so just formed the reserve hydraulic brake system that master cylinder ante-chamber 12 and master cylinder back cavity 14 and each drg directly are communicated with.Do not control the motor of each wheel braking actuating unit afterwards, but use self muscle power, master cylinder ante-chamber 12 and braking liquid in the master cylinder back cavity 14 are pressed in each drg through the reserve hydraulic brake system, thereby vehicle is implemented braking by chaufeur.Because said pedal sense simulator electromagnetic valve 25 is in the outage closed condition, so the braking liquid in the master cylinder back cavity 14 can not be pressed in the pedal sense simulator 3, implemented braking in the drg but farthest be pressed into.Said front axle electromagnetic valve 26 keeps outage to open the pressure of coaxial two drgs of balance with rear axle electromagnetic valve 27.
The working process of the reconstruct braking mode that said part wheel braking actuating unit lost efficacy is: judge at first whether brake pedal 17 is stepped on.If brake pedal 17 is stepped on; Then according to have in four wheel braking actuating units one, two still three wheel braking actuating units lost efficacy, get into three wheel braking actuating unit inefficacy reconstruct braking modes that single wheel braking actuating unit inefficacy reconstruct braking mode that brake pedal 17 steps on, dual wheels brake actuator inefficacy reconstruct braking mode that brake pedal 17 is stepped on and brake pedal 17 are stepped on respectively.If brake pedal 17 is not stepped on, then get into the part wheel braking actuating unit inefficacy reconstruct braking mode that brake pedal 17 is not stepped on.
The working process of the single wheel braking actuating unit inefficacy reconstruct braking mode that said brake pedal 17 is stepped on is: at first in reconstruct braking mode 1, reconstruct braking mode 2 and reserve hydraulic braking pattern, select to provide the braking mode of optimal brake effect, then according to this braking mode implementation and operation.Said reconstruct braking mode 1 refers to: under the situation that brake pedal 17 is stepped on and single wheel braking actuating unit lost efficacy; Use and simultaneously the pressure of these two drgs is controlled the reconstruct braking mode that the pressure of another two drgs is controlled by each self-corresponding wheel braking actuating unit respectively with the coaxial wheel braking actuating unit that do not lose efficacy of inefficacy wheel braking actuating unit.Said reconstruct braking mode 2 refers to: under the situation that brake pedal 17 is stepped on and single wheel braking actuating unit lost efficacy, and the reconstruct braking mode that uses three wheel braking actuating units that do not lose efficacy respectively the pressure of drg separately to be controlled.The common ground of the operation of reconstruct braking mode 1 and reconstruct braking mode 2 is: left front electromagnetic valve 21, right front electromagnetic valve 22, left back electromagnetic valve 23,24 energisings of right back electromagnetic valve are closed; 25 energisings of pedal sense simulator electromagnetic valve are opened, so that the pedal sense of pedal sense simulator 3 simulation traditional braking systems; There is not the break-make of the shaft balancing valve that the wheel braking actuating unit lost efficacy to depend on whether needs are independently controlled for the pressure of this two drg.ABS intervenes the perhaps goal pressure difference of these axle two drgs if desired, and then the pressure of these axle two drgs needs independent control, and this shaft balancing valve switches on and cuts out.Otherwise this shaft balancing valve keeps outage to open, and equates so that keep these axle two brake pressures; Left front pressure retaining valve 410, right front pressure retaining valve 510, left back pressure retaining valve 610 and right back pressure retaining valve 710 keep the outage open modes.The difference of the operation of reconstruct braking mode 1 and reconstruct braking mode 2 is: for reconstruct braking mode 1; Inefficacy wheel braking actuating unit place shaft balancing valve keeps outage to open; Simultaneously the pressure of these two drgs is controlled with the coaxial wheel braking actuating unit that do not lose efficacy of inefficacy wheel braking actuating unit so that use; Like this, through controlling the motor of three wheel braking actuating units that do not lose efficacy, just can realize the pressure control of four drgs; For reconstruct braking mode 2; The shaft balancing valve energising of inefficacy wheel braking actuating unit place is closed; So that the wheel braking actuating unit that do not lose efficacy of inefficacy wheel braking actuating unit place axle is only controlled the pressure of drg cooresponding with it; Like this, through controlling the motor of three wheel braking actuating units that do not lose efficacy, just can realize the pressure control of cooresponding three drgs.
With brake pedal 17 step on, front left wheel brake actuator 4 lost efficacy, uses reconstruct braking mode 1 and carry out the ABS intervention is example, the working process of the single wheel braking actuating unit inefficacy reconstruct braking mode that said brake pedal 17 is stepped on is further explained.Because brake pedal 17 is stepped on; So left front electromagnetic valve 21, right front electromagnetic valve 22, left back electromagnetic valve 23,24 energisings of right back electromagnetic valve are closed; 25 energisings of pedal sense simulator electromagnetic valve are opened, so that the pedal sense of pedal sense simulator 3 simulation traditional braking systems; Owing to use reconstruct braking mode 1, so front axle balance cock 26 keeps outage to open, so that use right front wheel brake actuator 5 simultaneously the pressure of left front brake 49 and right front brake 59 to be controlled; Left front pressure retaining valve 410, right front pressure retaining valve 510, left back pressure retaining valve 610 and right back pressure retaining valve 710 keep the outage open modes.Like this, through controlling the motor of three wheel braking actuating units that do not lose efficacy, just can realize the pressure control of four drgs; Intervene owing to carry out ABS, close, so that the pressure of left back drg 69 and right back drg 79 is independently controlled so rear axle balance cock 27 is switched on.
With brake pedal 17 step on, front left wheel brake actuator 4 lost efficacy, uses reconstruct braking mode 2, do not carry out the ABS intervention and rear axle two drg goal pressure equate to be example, the working process of the single wheel braking actuating unit inefficacy reconstruct braking mode that said brake pedal 17 is stepped on is further explained.Because brake pedal 17 is stepped on; So left front electromagnetic valve 21, right front electromagnetic valve 22, left back electromagnetic valve 23,24 energisings of right back electromagnetic valve are closed; 25 energisings of pedal sense simulator electromagnetic valve are opened, so that the pedal sense of pedal sense simulator 3 simulation traditional braking systems; Owing to use reconstruct braking mode 2, close so front axle balance cock 26 is switched on, so that right front wheel brake actuator 5 is only controlled the pressure of right front brake 59; Left front pressure retaining valve 410, right front pressure retaining valve 510, left back pressure retaining valve 610 and right back pressure retaining valve 710 keep the outage open modes.Like this, through controlling the motor of three wheel braking actuating units that do not lose efficacy, just can realize the pressure control of cooresponding three drgs; ABS intervenes and left back drg 69 equates with right back drg 79 goal pressure owing to not carrying out, and opens so rear axle balance cock 27 keeps cutting off the power supply, and equates with right back drg 79 pressure so that keep left back drg 69.
The working process of the dual wheels brake actuator inefficacy reconstruct braking mode that said brake pedal 17 is stepped on is: judge that at first two wheel braking actuating units that lost efficacy are coaxial; Still different axle homonymy; Still different axle heteropleural gets into the different axle heteropleural dual wheels brake actuator inefficacy reconstruct braking mode that different axle homonymy dual wheels brake actuator inefficacy reconstruct braking mode, brake pedal 17 that coaxial dual wheels brake actuator inefficacy reconstruct braking mode, brake pedal 17 that brake pedal 17 steps on step on are stepped on respectively according to judged result then.
The working process of the coaxial dual wheels brake actuator inefficacy reconstruct braking mode that said brake pedal 17 is stepped on is: at first in reconstruct braking mode 3 and reserve hydraulic braking pattern, select to provide the braking mode of optimal brake effect, then according to this braking mode implementation and operation.Said reconstruct braking mode 3 refers to: under the situation that brake pedal 17 is stepped on and coaxial dual wheels brake actuator lost efficacy, and the reconstruct braking mode that uses another two the wheel braking actuating units that do not lose efficacy that the pressure of another two drgs is controlled.The operation that reconstruct braking mode 3 is implemented is: left front electromagnetic valve 21, right front electromagnetic valve 22, left back electromagnetic valve 23,24 energisings of right back electromagnetic valve are closed; 25 energisings of pedal sense simulator electromagnetic valve are opened, so that the pedal sense of pedal sense simulator 3 simulation traditional braking systems; Inefficacy wheel braking actuating unit place shaft balancing valve keeps outage to open; The break-make of another shaft balancing valve depends on whether needs are independently controlled for the pressure of another two drg, if desired ABS intervene or the goal pressure of another two drg different, then the pressure of another two drg needs independent control; Another shaft balancing valve energising is closed; Otherwise another shaft balancing valve keeps outage to open, and equates so that keep another axle two brake pressures; Left front pressure retaining valve 410, right front pressure retaining valve 510, left back pressure retaining valve 610 and right back pressure retaining valve 710 keep the outage open modes.Control the motor of two wheel braking actuating units that do not lose efficacy then, just can realize the pressure control of cooresponding two drgs.
With brake pedal 17 step on, front left wheel brake actuator 4 and right front wheel brake actuator 5 lost efficacy, uses reconstruct braking mode 3 and carry out the ABS intervention is example, the working process of the coaxial dual wheels brake actuator inefficacy reconstruct braking mode that said brake pedal 17 is stepped on is further explained.Because brake pedal 17 is stepped on; So left front electromagnetic valve 21, right front electromagnetic valve 22, left back electromagnetic valve 23,24 energisings of right back electromagnetic valve are closed; 25 energisings of pedal sense simulator electromagnetic valve are opened, so that the pedal sense of pedal sense simulator 3 simulation traditional braking systems; Because front left wheel brake actuator 4 lost efficacy with right front wheel brake actuator 5, front axle balance cock 16 keeps outage to open; Owing to use reconstruct braking mode 3 and carry out the ABS intervention, so switching on, rear axle balance cock 27 closes, so that the pressure of left back drg 69 and right back drg 79 is independently controlled; Left front pressure retaining valve 410, right front pressure retaining valve 510, left back pressure retaining valve 610 and right back pressure retaining valve 710 keep the outage open modes.Control left back motor 61 and right back motor 71 then, just can realize the pressure control of left back drg 69 and right back drg 79.
The working process of the different axle homonymy dual wheels brake actuator inefficacy reconstruct braking mode that said brake pedal 17 is stepped on is: at first in reconstruct braking mode 4, reconstruct braking mode 5, reconstruct braking mode 6, reconstruct braking mode 7 and reserve hydraulic braking pattern, select to provide the braking mode of optimal brake effect, then according to this braking mode implementation and operation.Said reconstruct braking mode 4 refers to: under the situation that brake pedal 17 is stepped on and different axle homonymy dual wheels brake actuator lost efficacy, and the reconstruct braking mode that uses two wheel braking actuating units that do not lose efficacy simultaneously the pressure of four drgs to be controlled.Said reconstruct braking mode 5 refers to: under the situation that brake pedal 17 is stepped on and different axle homonymy dual wheels brake actuator lost efficacy; Use the front axle wheel braking actuating unit that do not lose efficacy simultaneously the pressure of two drgs of front axle to be controlled, use rear axle not lose efficacy reconstruct braking mode that the pressure of wheel braking actuating unit pair drg cooresponding with it controls.Said reconstruct braking mode 6 refers to: under the situation that brake pedal 17 is stepped on and different axle homonymy dual wheels brake actuator lost efficacy; Use the do not lose efficacy pressure of wheel braking actuating unit pair drg cooresponding of front axle to control, the use rear axle reconstruct braking mode that the wheel braking actuating unit is controlled the pressure of two drgs of rear axle simultaneously that do not lose efficacy with it.Said reconstruct braking mode 7 refers to: under the situation that brake pedal 17 is stepped on and different axle homonymy dual wheels brake actuator lost efficacy, and the reconstruct braking mode that uses the pressure of two wheel braking actuating unit pair drgs cooresponding that do not lose efficacy to control with it.The common ground of the operation of reconstruct braking mode 4, reconstruct braking mode 5, reconstruct braking mode 6 and reconstruct braking mode 7 is: left front electromagnetic valve 21, right front electromagnetic valve 22, left back electromagnetic valve 23,24 energisings of right back electromagnetic valve are closed; 25 energisings of pedal sense simulator electromagnetic valve are opened, so that the pedal sense of pedal sense simulator 3 simulation traditional braking systems; Left front pressure retaining valve 410, right front pressure retaining valve 510, left back pressure retaining valve 610 and right back pressure retaining valve 710 keep the outage open modes.Difference is: for reconstruct braking mode 4, front axle balance cock 26 keeps outage to open with rear axle balance cock 27, like this, through controlling the motor of two wheel braking actuating units that do not lose efficacy, just can realize the pressure control of four drgs.For reconstruct braking mode 5; Front axle balance cock 26 keeps outage to open; 27 energisings of rear axle balance cock are closed; Like this, through controlling the motor of two wheel braking actuating units that do not lose efficacy, just can realize the pressure control of cooresponding two drgs and the cooresponding drg of front axle inefficacy wheel braking actuating unit.For reconstruct braking mode 6; 26 energisings of front axle balance cock are closed; Rear axle balance cock 27 keeps outage to open; Like this, through controlling the motor of two wheel braking actuating units that do not lose efficacy, just can realize the pressure control of cooresponding two drgs and the cooresponding drg of rear axle inefficacy wheel braking actuating unit.For reconstruct braking mode 7, front axle balance cock 26 is switched on rear axle balance cock 27 and is closed, and through controlling the motor of two wheel braking actuating units that do not lose efficacy, just can realize the pressure control of cooresponding two drgs like this.
With brake pedal 17 step on, front left wheel brake actuator 4 and left back wheel braking actuating unit 6 lost efficacy, use reconstruct braking mode 4 to be example, the working process of the different homonymy dual wheels brake actuator inefficacy reconstruct braking mode that said brake pedal 17 is stepped on is further explained.Because brake pedal 17 is stepped on; So left front electromagnetic valve 21, right front electromagnetic valve 22, left back electromagnetic valve 23,24 energisings of right back electromagnetic valve are closed; 25 energisings of pedal sense simulator electromagnetic valve are opened, so that the pedal sense of pedal sense simulator 3 simulation traditional braking systems; Because front left wheel brake actuator 4 lost efficacy with left back wheel braking actuating unit 6 and used reconstruct braking mode 4, front axle balance cock 26 keeps outage to open with rear axle balance cock 27; Left front pressure retaining valve 410, right front pressure retaining valve 510, left back pressure retaining valve 610 and right back pressure retaining valve 710 keep the outage open modes.Like this, through controlling right front motor 51 and right back motor 71, just can realize the pressure control of four drgs.
With brake pedal 17 step on, front left wheel brake actuator 4 and left back wheel braking actuating unit 6 lost efficacy, use reconstruct braking mode 5 to be example, the working process of the different homonymy dual wheels brake actuator inefficacy reconstruct braking mode that said brake pedal 17 is stepped on is further explained.Because brake pedal 17 is stepped on; So left front electromagnetic valve 21, right front electromagnetic valve 22, left back electromagnetic valve 23,24 energisings of right back electromagnetic valve are closed; 25 energisings of pedal sense simulator electromagnetic valve are opened, so that the pedal sense of pedal sense simulator 3 simulation traditional braking systems; Because front left wheel brake actuator 4 lost efficacy with left back wheel braking actuating unit 6 and used reconstruct braking mode 5, so front axle balance cock 26 keeps outage to open, 27 energisings of rear axle balance cock are closed; Left front pressure retaining valve 410, right front pressure retaining valve 510, left back pressure retaining valve 610 and right back pressure retaining valve 710 keep the outage open modes.Like this, through controlling right front motor 51 and right back motor 71, just can realize the pressure control of left front brake 49, right front brake 59 and right back drg 79.
The working process of the different axle heteropleural dual wheels brake actuator inefficacy reconstruct braking mode that said brake pedal 17 is stepped on is: at first in reconstruct braking mode 8, reconstruct braking mode 9, reconstruct braking mode 10, reconstruct braking mode 11 and reserve hydraulic braking pattern, select to provide the braking mode of optimal brake effect, then according to this braking mode implementation and operation.Said reconstruct braking mode 8 refers to: under the situation that brake pedal 17 is stepped on and different axle heteropleural dual wheels brake actuator lost efficacy, and the reconstruct braking mode that uses two wheel braking actuating units that do not lose efficacy simultaneously the pressure of four drgs to be controlled.Said reconstruct braking mode 9 refers to: under the situation that brake pedal 17 is stepped on and different axle heteropleural dual wheels brake actuator lost efficacy; Use the front axle wheel braking actuating unit that do not lose efficacy simultaneously the pressure of two drgs of front axle to be controlled, use rear axle not lose efficacy reconstruct braking mode that the pressure of wheel braking actuating unit pair drg cooresponding with it controls.Said reconstruct braking mode 10 refers to: under the situation that brake pedal 17 is stepped on and different axle heteropleural dual wheels brake actuator lost efficacy; Use the do not lose efficacy pressure of wheel braking actuating unit pair drg cooresponding of front axle to control, the use rear axle reconstruct braking mode that the wheel braking actuating unit is controlled the pressure of two drgs of rear axle simultaneously that do not lose efficacy with it.Said reconstruct braking mode 11 refers to: under the situation that brake pedal 17 is stepped on and different axle heteropleural dual wheels brake actuator lost efficacy, and the reconstruct braking mode that uses the pressure of two wheel braking actuating unit pair drgs cooresponding that do not lose efficacy to control with it.The common ground of the operation of reconstruct braking mode 8, reconstruct braking mode 9, reconstruct braking mode 10 and reconstruct braking mode 11 is: left front electromagnetic valve 21, right front electromagnetic valve 22, left back electromagnetic valve 23,24 energisings of right back electromagnetic valve are closed; 25 energisings of pedal sense simulator electromagnetic valve are opened, so that the pedal sense of pedal sense simulator 3 simulation traditional braking systems; Left front pressure retaining valve 410, right front pressure retaining valve 510, left back pressure retaining valve 610 and right back pressure retaining valve 710 keep the outage open modes.Difference is: for reconstruct braking mode 8, front axle balance cock 26 keeps outage to open with rear axle balance cock 27, like this, through controlling the motor of two wheel braking actuating units that do not lose efficacy, just can realize the pressure control of four drgs.For reconstruct braking mode 9; Front axle balance cock 26 keeps outage to open; 27 energisings of rear axle balance cock are closed; Like this, through controlling the motor of two wheel braking actuating units that do not lose efficacy, just can realize the pressure control of cooresponding two drgs and the cooresponding drg of front axle inefficacy wheel braking actuating unit.For reconstruct braking mode 10; 26 energisings of front axle balance cock are closed; Rear axle balance cock 27 keeps outage to open; Like this, through controlling the motor of two wheel braking actuating units that do not lose efficacy, just can realize the pressure control of cooresponding two drgs and the cooresponding drg of rear axle inefficacy wheel braking actuating unit.For reconstruct braking mode 11, front axle balance cock 26 is switched on rear axle balance cock 27 and is closed, and through controlling the motor of two wheel braking actuating units that do not lose efficacy, just can realize the pressure control of cooresponding two drgs like this.
With brake pedal 17 step on, front left wheel brake actuator 4 and right rear wheel brake actuator 7 lost efficacy, use reconstruct braking mode 10 to be example, the working process of the different heteropleural dual wheels brake actuator inefficacy reconstruct braking mode that said brake pedal 17 is stepped on is further explained.Because brake pedal 17 is stepped on; So left front electromagnetic valve 21, right front electromagnetic valve 22, left back electromagnetic valve 23,24 energisings of right back electromagnetic valve are closed; 25 energisings of pedal sense simulator electromagnetic valve are opened, so that the pedal sense of pedal sense simulator 3 simulation traditional braking systems; Because front left wheel brake actuator 4 lost efficacy with right rear wheel brake actuator 7 and used reconstruct braking mode 10, so 26 energisings of front axle balance cock are closed, rear axle balance cock 27 keeps outage to open; Left front pressure retaining valve 410, right front pressure retaining valve 510, left back pressure retaining valve 610 and right back pressure retaining valve 710 keep the outage open modes.Like this, through controlling right front motor 51 and left back motor 61, just can realize pressure control to right front brake 59, left back drg 69 and right back drg 79.
With brake pedal 17 step on, front left wheel brake actuator 4 and right rear wheel brake actuator 7 lost efficacy, use reconstruct braking mode 11 to be example, the working process of the different heteropleural dual wheels brake actuator inefficacy reconstruct braking mode that said brake pedal 17 is stepped on is further explained.Because brake pedal 17 is stepped on; So left front electromagnetic valve 21, right front electromagnetic valve 22, left back electromagnetic valve 23,24 energisings of right back electromagnetic valve are closed; 25 energisings of pedal sense simulator electromagnetic valve are opened, so that the pedal sense of pedal sense simulator 3 simulation traditional braking systems; Because front left wheel brake actuator 4 lost efficacy with right rear wheel brake actuator 7 and used reconstruct braking mode 11, so front axle balance cock 26 and 27 energisings of rear axle balance cock are closed; Left front pressure retaining valve 410, right front pressure retaining valve 510, left back pressure retaining valve 610 and right back pressure retaining valve 710 keep the outage open modes.Like this, through controlling right front motor 51 and left back motor 61, just can realize pressure control to right front brake 59 and left back drg 69.
The working process of three wheel braking actuating unit inefficacy reconstruct braking modes that said brake pedal 17 is stepped on is: at first in reconstruct braking mode 12, reconstruct braking mode 13 and reserve hydraulic braking pattern, select to provide the braking mode of optimal brake effect, then according to this braking mode implementation and operation.Said reconstruct braking mode 12 refers to: under the situation that brake pedal 17 is stepped on and three wheel braking actuating units lost efficacy, and the reconstruct braking mode that uses the wheel braking actuating unit that do not lose efficacy simultaneously the pressure of two drgs of the wheel braking actuating unit place axle that do not lose efficacy to be controlled.Said reconstruct braking mode 13 refers to: under the situation that brake pedal 17 is stepped on and three wheel braking actuating units lost efficacy, and the reconstruct braking mode that uses the pressure of the wheel braking actuating unit pair drg cooresponding that do not lose efficacy to control with it.The common ground of the operation of reconstruct braking mode 12 and reconstruct braking mode 13 is: left front electromagnetic valve 21, right front electromagnetic valve 22, left back electromagnetic valve 23,24 energisings of right back electromagnetic valve are closed; 25 energisings of pedal sense simulator electromagnetic valve are opened, so that the pedal sense of pedal sense simulator 3 simulation traditional braking systems; The shaft balancing valve that two wheel braking actuating units all lost efficacy keeps outage to open; Left front pressure retaining valve 410, right front pressure retaining valve 510, left back pressure retaining valve 610 and right back pressure retaining valve 710 keep the outage open modes.Difference is: for reconstruct braking mode 12; The wheel braking actuating unit that do not lose efficacy place shaft balancing valve keeps outage to open; Like this; Through the do not lose efficacy motor of wheel braking actuating unit of control, the pressure control of wheel braking actuating unit place two drgs of just can realizing not losing efficacy.For reconstruct braking mode 13, the shaft balancing valve energising of the wheel braking actuating unit that do not lose efficacy place is closed, and through controlling the motor of the wheel braking actuating unit that do not lose efficacy, just can realize the pressure control of a cooresponding drg like this.
With brake pedal 17 step on, front left wheel brake actuator 4 do not lose efficacy; Its excess-three wheel braking actuating unit lost efficacy, uses reconstruct braking mode 12 to be example, and the working process of three wheel braking actuating unit inefficacy reconstruct braking modes that said brake pedal 17 is stepped on is further explained.Because brake pedal 17 is stepped on; So left front electromagnetic valve 21, right front electromagnetic valve 22, left back electromagnetic valve 23,24 energisings of right back electromagnetic valve are closed; 25 energisings of pedal sense simulator electromagnetic valve are opened, so that the pedal sense of pedal sense simulator 3 simulation traditional braking systems; Because front left wheel brake actuator 4 did not lose efficacy, its excess-three wheel braking actuating unit lost efficacy and used reconstruct braking mode 12, so front axle balance cock 26 keeps outage to open; Left front pressure retaining valve 410, right front pressure retaining valve 510, left back pressure retaining valve 610 and right back pressure retaining valve 710 keep the outage open modes.Like this, through controlling left front motor 41, just can realize pressure control to left front brake 49 and right front brake 59; Rear axle balance cock 27 keeps the outage open mode.
The working process of the part wheel braking actuating unit inefficacy reconstruct braking mode that said brake pedal 17 is not stepped on is: at first judge under the situation that brake pedal 17 is not stepped on need be by the brake activation intervention of ESC system be the outside two drgs or inboard rear brake; That is to say because of negative understeer appears in vehicle and need move the device active boost outside two-system; Still because of understeering needs internal rear flank drg active boost, take different operation according to judged result then.The brake activation intervention is the outside two drgs if desired; And the outside two wheel braking actuating units all lost efficacy, and then two wheel braking actuating units cooresponding electromagnetic valve energising in the outside is closed, and front axle balance cock 26 and 27 energisings of rear axle balance cock are closed; All the other electromagnetic valves keep off-position; Like this, through the motor of the control outside two wheel braking actuating units, just can realize the ESC intervention of same effect when all the wheel braking actuating units did not all lose efficacy.The brake activation intervention is the outside two drgs if desired; And one of the outside two wheel braking actuating units lost efficacy; And do not lose efficacy with the coaxial inboard wheel brake actuator of outside inefficacy wheel braking actuating unit; Then the outside cooresponding electromagnetic valve of wheel braking actuating unit and the outside wheel braking actuating unit place shaft balancing valve energising of not losing efficacy of not losing efficacy is closed; And with the outside lost efficacy the cooresponding electromagnetic valve of wheel braking actuating unit, close with the cooresponding electromagnetic valve of wheel braking actuating unit and the pressure retaining valve energising of not losing efficacy of the coaxial inboard of outside inefficacy wheel braking actuating unit; All the other electromagnetic valves keep off-positions, like this, through the control outside do not lose efficacy the wheel braking actuating unit motor and with the do not lose efficacy motor of wheel braking actuating unit of the coaxial inboard of outside inefficacy wheel braking actuating unit; Just can implement the brake regulation to the moving device of outside two-system, the intervention effect when its ESC intervention effect did not all lose efficacy with whole wheel braking actuating units is identical.The brake activation intervention is the outside two drgs if desired; And one of the outside two wheel braking actuating units lost efficacy; And also lost efficacy with the coaxial inboard wheel brake actuator of outside inefficacy wheel braking actuating unit; Then the outside cooresponding electromagnetic valve of wheel braking actuating unit and the outside wheel braking actuating unit place shaft balancing valve energising of not losing efficacy of not losing efficacy is closed; All the other electromagnetic valves keep off-position, like this, and through the motor of the wheel braking actuating unit that do not lose efficacy outside the control; Just can implement brake regulation to the outside cooresponding drg of wheel braking actuating unit that do not lose efficacy, the intervention effect when its ESC intervention effect did not all lose efficacy with whole wheel braking actuating units is compared and may be decreased.The brake activation intervention is the outside two drgs if desired; And the outside two wheel braking actuating units all lost efficacy; Then the inboard cooresponding electromagnetic valve of wheel braking actuating unit and the pressure retaining valve energising of not losing efficacy is closed, and will close with the inboard cooresponding electromagnetic valve energising of the coaxial outboard wheels brake actuator of wheel braking actuating unit of not losing efficacy, all the other electromagnetic valves keep off-positions; Like this; Through controlling the motor of the inboard wheel braking actuating unit that do not lose efficacy, just can implement brake regulation, if inboard two wheel braking actuating units did not all lose efficacy to the cooresponding drg of the outboard wheels brake actuator coaxial with it; Can realize that then the ESC of same effect did not intervene when all the wheel braking actuating units all lose efficacy; If in the inboard two wheel braking actuating units one did not lose efficacy, then also can implement ESC and intervene, but intervention effect is compared and may be decreased when all not losing efficacy with whole wheel braking actuating units.The brake activation intervention is inboard rear brake if desired; And inboard rear wheel brake actuator did not lose efficacy; Then cooresponding electromagnetic valve of inboard rear wheel brake actuator and 27 energisings of rear axle balance cock are closed, other electromagnetic valves keep off-position, like this; Through controlling the motor of inboard rear wheel brake actuator, just can realize that the ESC of same effect did not intervene when all the wheel braking actuating units all lose efficacy.The brake activation intervention is inboard rear brake if desired; And inboard rear wheel brake actuator lost efficacy, but outside rear wheel brake actuator do not lose efficacy, and then rear wheel brake actuator cooresponding electromagnetic valve in the outside was switched on pressure retaining valve and closed; And the energising of the cooresponding electromagnetic valve of inboard rear wheel brake actuator closed; All the other electromagnetic valves keep off-position, like this, and through the motor of control outside rear wheel brake actuator; Just can implement the brake regulation of internal rear flank drg, the intervention effect when its ESC intervention effect did not all lose efficacy with whole wheel braking actuating units is identical.The brake activation intervention is inboard rear brake if desired; And inboard rear wheel brake actuator and outside rear wheel brake actuator all lost efficacy; But inboard front vehicle wheel brake actuator did not lose efficacy, and then cooresponding electromagnetic valve of inboard front vehicle wheel brake actuator and 26 energisings of front axle balance cock was closed, and all the other electromagnetic valves keep off-position; Like this; Through controlling the motor of inboard front vehicle wheel brake actuator, just can implement brake regulation to inboard front brake, the intervention effect when its ESC intervention effect did not all lose efficacy with whole wheel braking actuating units is compared and may be decreased.The brake activation intervention is inboard rear brake if desired; And inboard rear wheel brake actuator, outside rear wheel brake actuator, inboard front vehicle wheel brake actuator all lost efficacy; But outside front vehicle wheel brake actuator did not lose efficacy; Then cooresponding electromagnetic valve of outside front vehicle wheel brake actuator and pressure retaining valve energising are closed, and the cooresponding electromagnetic valve energising of inboard front vehicle wheel brake actuator is closed, all the other electromagnetic valves keep off-position; Like this; Through the motor of control outside front vehicle wheel brake actuator, just can implement brake regulation to inboard front brake, the intervention effect when its ESC intervention effect did not all lose efficacy with whole wheel braking actuating units is compared and may be decreased.
With brake pedal 17 do not step on, need to intervene that left front brake 49 and left back drg 69 and front left wheel brake actuator 4 lost efficacy, right front wheel brake actuator 5 and left back wheel braking actuating unit 6 did not lose efficacy is example, the working process of the part wheel braking actuating unit inefficacy reconstruct braking mode that said brake pedal 17 is not stepped on is further explained.Because needing to intervene left front brake 49 did not lose efficacy with left back drg 69 and 4 inefficacies of front left wheel brake actuator, right front wheel brake actuator 5 and left back wheel braking actuating unit 6; Therefore left back electromagnetic valve 23 is switched on rear axle balance cock 27 and close; And left front electromagnetic valve 21, right front electromagnetic valve 22 and 510 energisings of right front pressure retaining valve are closed; All the other electromagnetic valves keep off-position; Like this, can implement the active boost intervention to left front brake 49 and left back drg 69 through controlling right front motor 51 respectively with left back motor 61, the intervention effect when its ESC intervention effect did not all lose efficacy with whole wheel braking actuating units is identical.
Do not step on, need to intervene that left back drg 69 and left back wheel braking actuating unit 6 and right rear wheel brake actuator 7 lost efficacy, front left wheel brake actuator 4 did not lose efficacy is example with brake pedal 17, the working process of the part wheel braking actuating unit inefficacy reconstruct braking mode that said brake pedal 17 is not stepped on is further explained.Left back drg 69 and left back wheel braking actuating unit 6 lost efficacy with right rear wheel brake actuator 7, front left wheel brake actuator 4 did not lose efficacy owing to need to intervene; Therefore 26 energisings are closed with the front axle balance cock, all the other electromagnetic valves keep off-positions with left front electromagnetic valve 21; Carry out the active boost intervention through controlling 41 pairs of left front brake of left front motor 49, the intervention effect when its ESC intervention effect did not lose efficacy with left back wheel braking actuating unit 6 is compared and may be decreased.
In addition; Using the wheel braking actuating unit to set up under the situation of brake pressure, needn't continue electrical power to the wheel braking actuating unit, only need energising to close the pressure retaining valve of corresponding drg; Just can realize the pressurize of corresponding brake pressure, thus the energy consumption of greatly reducing.
Should be noted that at last; The above specific embodiment is only unrestricted in order to technical scheme of the present invention to be described; Although the present invention is specified with reference to concrete embodiment, those of ordinary skill in the art should be appreciated that and can make amendment or be equal to replacement technical scheme of the present invention; And not breaking away from the spirit and the scope of technical scheme of the present invention, it all should be encompassed in the middle of the claim scope of the present invention.
Claims (1)
1. automobile distribution EHB that has pressure retaining valve, it is characterized in that: this brake system comprises brake actuating unit, electromagnetic valve piece, pedal sense simulator, front left wheel brake actuator, left front brake, left front pressure retaining valve, right front wheel brake actuator, right front brake, right front pressure retaining valve, left back wheel braking actuating unit, left back drg, left back pressure retaining valve, right rear wheel brake actuator, right back drg, right back pressure retaining valve;
Described brake actuating unit is made up of master cylinder body, master cylinder ante-chamber piston, master cylinder back cavity piston, push rod and brake pedal; Master cylinder ante-chamber piston wherein places the front portion of master cylinder body; Form the master cylinder ante-chamber, master cylinder back cavity piston places the rear portion of master cylinder body, forms the master cylinder back cavity;
Described electromagnetic valve piece comprises left front electromagnetic valve, right front electromagnetic valve, left back electromagnetic valve, right back electromagnetic valve, pedal sense simulator electromagnetic valve, front axle balance cock and rear axle balance cock; Wherein said left front electromagnetic valve links to each other with described master cylinder ante-chamber through brake piping respectively with right front electromagnetic valve; Described left back electromagnetic valve, right back electromagnetic valve and pedal sense simulator electromagnetic valve link to each other with the master cylinder back cavity through brake piping respectively; The left and right outlet of described front axle balance cock links to each other with right front electromagnetic valve with left front electromagnetic valve through brake piping respectively, and the left and right outlet of described rear axle balance cock links to each other with right back electromagnetic valve with left back electromagnetic valve through brake piping respectively;
Described pedal sense simulator is made up of housing, piston and spring, and piston and spring are installed in the housing, and pedal sense simulator links to each other with the pedal sense simulator electromagnetic valve through brake piping;
Described front left wheel brake actuator, right front wheel brake actuator, left back wheel braking actuating unit are identical with the structure of right rear wheel brake actuator; Comprise motor, coupler, nut, screw mandrel and piston respectively; Described motor is installed on the housing of actuating unit; Screw mandrel, nut and piston be coaxial successively to be installed in the housing of actuating unit, and the space between piston and the shell end forms the braking sap cavity, and motor links to each other with screw mandrel through coupler; Wherein the braking sap cavity of front left wheel brake actuator links to each other with the master cylinder ante-chamber of left front electromagnetic valve and brake actuating unit through brake piping successively; The braking sap cavity of right front wheel brake actuator links to each other with the master cylinder ante-chamber of right front electromagnetic valve and brake actuating unit through brake piping successively; The braking sap cavity of left back wheel braking actuating unit links to each other with the master cylinder back cavity of left back electromagnetic valve and brake actuating unit through brake piping successively, and the braking sap cavity of right rear wheel brake actuator links to each other with the master cylinder back cavity of right back electromagnetic valve and brake actuating unit through brake piping successively;
Described left front brake links to each other with the braking sap cavity of described left front pressure retaining valve and front left wheel brake actuator through brake piping successively; Described right front brake links to each other with the braking sap cavity of described right front pressure retaining valve and right front wheel brake actuator through brake piping successively; Described left back drg links to each other with the braking sap cavity of described left back pressure retaining valve and left back wheel braking actuating unit through brake piping successively, and described right back drg links to each other with the braking sap cavity of described right back pressure retaining valve and right rear wheel brake actuator through brake piping successively.
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| CN2012100845282A CN102582605A (en) | 2012-03-27 | 2012-03-27 | Automotive distributed electronic hydraulic braking system with pressure retaining valves |
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Application publication date: 20120718 |