CN102700537A - Vehicle braking energy recovery system - Google Patents
Vehicle braking energy recovery system Download PDFInfo
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- CN102700537A CN102700537A CN2012101886947A CN201210188694A CN102700537A CN 102700537 A CN102700537 A CN 102700537A CN 2012101886947 A CN2012101886947 A CN 2012101886947A CN 201210188694 A CN201210188694 A CN 201210188694A CN 102700537 A CN102700537 A CN 102700537A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
- B60T8/32—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration
- B60T8/34—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration having a fluid pressure regulator responsive to a speed condition
- B60T8/48—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration having a fluid pressure regulator responsive to a speed condition connecting the brake actuator to an alternative or additional source of fluid pressure, e.g. traction control systems
- B60T8/4809—Traction control, stability control, using both the wheel brakes and other automatic braking systems
- B60T8/4827—Traction control, stability control, using both the wheel brakes and other automatic braking systems in hydraulic brake systems
- B60T8/4863—Traction control, stability control, using both the wheel brakes and other automatic braking systems in hydraulic brake systems closed systems
- B60T8/4872—Traction control, stability control, using both the wheel brakes and other automatic braking systems in hydraulic brake systems closed systems pump-back systems
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Abstract
The invention relates to a vehicle braking energy recovery system which comprises a vehicle hydraulic braking system and a vehicle stability control system hydraulic unit, wherein an oil path between each bypass of electromagnetic valve and an oil pump motor is respectively provided with a pedal stroke simulator so as to form a hydraulic control unit; each oil inlet of each hydraulic control unit is respectively connected with each oil outlet of a brake master cylinder through an oil inlet pipeline; each oil inlet pipeline is provided with a master cylinder pressure sensor; each oil outlet of each hydraulic control unit is respectively and correspondingly connected with a brake wheel cylinder through an oil outlet pipeline; an oil outlet pipeline between the oil outlet of each front wheel and a corresponding front wheel brake wheel cylinder is provided with a front wheel cylinder pressure sensor; the master cylinder pressure sensors and the front wheel cylinder pressure sensors collect pressure signals and send the pressure signals to a brake controller; and under a control mode, the brake controller and an entire vehicle controller perform CAN (Controller Area Network) communication; and the entire vehicle controller simultaneously performs CAN communication together with a motor controller so as to control a driving motor to brake. The vehicle braking energy recovery system can be widely applicable to pure electric vehicles or hybrid electric vehicles.
Description
Technical field
The present invention relates to a kind of vehicle braking energy recovery system, particularly guarantee that about a kind of the sense of chaufeur brake pedal has the vehicle braking energy recovery system that is applicable to pure electric vehicle or hybrid electric vehicle of Stability Control function concurrently.
Background technology
Along with the aggravation of energy problem and problem of environmental pollution, the research of elec. vehicle is significant with application.One of key issue that is faced in the elec. vehicle research process is that the specific energy of electrokinetic cell is lower, causes the continual mileage of elec. vehicle to compare the traditional combustion engine vehicle and has big inferior position.Address this problem; Except the technical seeking breakthrough of this bottleneck of battery, each item of how optimizing elec. vehicle designs, sets up the EMS of highly effective and safe, use rationally and energy savings becomes an important topic that faces in elec. vehicle development and the development process.The braking energy recovery technology is the extensive pioneering technology that adopts of present home and abroad elec. vehicle maker; In braking procedure,, make it be operated in generating state with the drive motor electric voltage reverse-connection; Utilize the regenerative braking power of drive motor that vehicle is braked; The energy of its feedback will be with the stores of electric energy in battery, thereby reclaims the part kinetic energy of vehicle in braking procedure, has greatly improved the capacity usage ratio of elec. vehicle.
The at present external advanced brake system that braking energy reclaims function that has that proposes comprises: Toyota-general sharp this brake system and continent-composite braking system, thus these two kinds of brake system are carried out bigger transformation to original brake system and have been realized the feedback braking function.These two kinds of systems not only realize the braking energy feedback function, and guarantee the function of vehicle at limiting condition ABS, TCS and ESP/VSC.Toyota-general sharp this brake system, continent-composite braking system are being represented the forward position of feedback braking function development; But; Above-mentioned two kinds of existing brake system all are that brake system is designed to realize the braking energy feedback function again; Not only complex structure is higher to manufacture process requirement, and cost is expensive.
Summary of the invention
To the problems referred to above; The purpose of this invention is to provide and a kind ofly only the traditional hydraulic brake system of vehicle is transformed; Just can guarantee the good pedal sense of chaufeur, and have the vehicle stability controllable function, obtain the vehicle braking energy recovery system of higher-energy organic efficiency simultaneously.
For realizing above-mentioned purpose; The present invention takes following technical scheme: a kind of vehicle braking energy recovery system; It is characterized in that: it comprises hydraulic vehicle brake system and vehicle stability controlled system hydraulic pressure unit; Said hydraulic vehicle brake system includes master brake cylinder, fluid reservoir, brake pedal, vacuum booster and wheel braking wheel cylinder; Said vehicle stability controlled system hydraulic pressure unit includes right front-left back brake circuit and left front-right back brake circuit, includes main road electromagnetic valve, bypass electromagnetic valve, each wheel turnover solenoid, oil pump and low pressure accumulator on each said brake circuit, the shared pump oil of two said brake circuits motor; On the oil circuit between each said bypass electromagnetic valve and the said pump oil motor pedal stroke simulator is set respectively and forms hydraulic control unit with braking energy recovery function; Each oil inlet of said hydraulic control unit is through each oil outlet of the said master brake cylinder of the chargine line corresponding connection of difference; On arbitrary said chargine line a master cylinder pressure sensor is set; Each oil outlet of said hydraulic control unit is through fuel-displaced pipeline each wheel braking wheel cylinder of corresponding connection respectively, on the fuel-displaced pipeline between wherein arbitrary front-wheel oil outlet and the corresponding front wheel cylinder front-wheel pressure of wheel braking cylinder sensor is set; Said master cylinder pressure sensor and front-wheel pressure of wheel braking cylinder sensor are gathered pressure signal respectively and are sent to brake controller; Said brake controller is controlled each said electromagnetic valve, pedal stroke simulator, oil pump and pump oil machine operation respectively according to pressure signal under each master mode; And carrying out the CAN communication with entire car controller simultaneously, said entire car controller carries out CAN communication control drive motor with electric machine controller simultaneously and brakes.
It also includes an electric vacuum pump; Said master brake cylinder connects said brake pedal through a master cylinder push rod; Be provided with said vacuum booster between said master cylinder push rod and the said brake pedal, said electric vacuum pump connects said vacuum booster provides brake boost for it.
Said brake controller comprises five kinds of master modes: braking energy feedback master mode, ABS control pattern, braking energy reclaim and the integrated master mode of ABS, ASR master mode and ESP master mode.
The working process of said braking energy feedback master mode is: 1) entire car controller monitor vehicle real-time running state; Calculate the current maximum feedback moment values M0 that can provide of drive motor, and maximum feedback moment values M0 is sent to brake controller through the CAN bus; 2) master cylinder pressure sensor and front-wheel pressure of wheel braking cylinder sensor are distinguished the pressure value P 1 and front-wheel pressure of wheel braking cylinder value P2 of brake monitoring master cylinder, and it is sent to brake controller respectively; 3) brake controller calculates master cylinder pressure rate of change dP1/dt according to master cylinder pressure value P1; And combine the pressure value P 1 and the front-wheel pressure of wheel braking cylinder value P2 of maximum feedback moment values M0, master brake cylinder; Calculate the current motor regenerative braking torque command value M1 that should be applied to front axle; And it is sent to entire car controller through the CAN bus; Entire car controller sends to electric machine controller with motor regenerative braking torque command value M1 through the CAN bus, and electric machine controller sends to brake controller through the CAN bus through entire car controller with the current actual feedback moment values M2 that sends of drive motor; 4) brake controller compares motor regenerative braking torque command value M1 and the current actual feedback moment values M2 of drive motor, and sends front-wheel pressurize, supercharging and decompression instruction according to comparative result to hydraulic control unit and accomplish regenerative braking.
Said braking energy reclaims and the control method of the integrated master mode of ABS comprises two kinds: 1) when the ABS control of access, regenerative braking is withdrawed from immediately; 2) when the ABS control of access, regenerative braking power is participated in ABS control.
The present invention is owing to take above technical scheme; It has the following advantages: 1, the present invention is owing to be provided with a pedal stroke simulator respectively on two oil circuits between two bypass electromagnetic valves and the pump oil motor; Formation has the hydraulic control unit that braking energy reclaims function; Therefore, when chaufeur was stepped on brake pedal, front-wheel applied regenerative braking power and when not applying hydraulic braking force; Two pedal simulators can receive from master brake cylinder and flow out and the former braking liquid that should flow in the front-wheel wheel cylinder; Thereby make pressure and the near front wheel wheel cylinder and the decoupling zero of off front wheel wheel cylinder of master brake cylinder, promptly cut off getting in touch of brake pedal and the near front wheel pressure of wheel braking cylinder and off front wheel pressure of wheel braking cylinder, therefore can guarantee the brake pedal feel identical with conventional truck.2, the present invention includes a master cylinder pressure sensor and a front-wheel pressure of wheel braking cylinder sensor; Brake controller is controlled each electromagnetic valve, pedal stroke simulator, oil pump and pump oil machine operation respectively according to master cylinder pressure value of gathering and front-wheel pressure of wheel braking cylinder value under each master mode; And carry out the CAN communication with entire car controller simultaneously; Entire car controller carries out CAN communication control drive motor with electric machine controller simultaneously and brakes; Therefore not only guarantee the stability of vehicle ', and reclaimed braking energy to the utmost, prolonged the continual mileage of electro-motive vehicle.3, the present invention is owing to be provided with an electric vacuum pump; And electric vacuum pump is connected with vacuum booster; Therefore when the Motorized vacuum pump work, can degree of vacuum be provided, make vacuum booster that bigger brake boost can be provided for the vacuum booster of elec. vehicle.4, the present invention carries out the integrated control that less transformation promptly can be implemented in braking energy feedback control, ABS control, ASR control, ESP control and braking energy feedback and ABS to the hydraulic brake system of motor vehicle driven by mixed power or pure electric vehicle; Compared with prior art need not design again brake controller; Therefore easy to make, simple to operate, and effectively reduce cost.The present invention can be in pure electric vehicle or hybrid electric vehicle.
Description of drawings
Fig. 1 is a structural representation of the present invention, and dotted line is that signal transmits schematic lines;
Fig. 2 is that the present invention has the hydraulic control unit structural representation that braking energy reclaims function.
The specific embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is carried out detailed description.
Like Fig. 1, shown in Figure 2; The present invention improves on the basis of existing vehicle conventional hydraulic brake system and vehicle stability controlled system hydraulic pressure unit, and vehicle conventional hydraulic brake system includes master brake cylinder 1, fluid reservoir 2, brake pedal 3, vacuum booster 4 and four wheel braking wheel cylinder LR, RF, LF, RR; The vehicle stability controlled system hydraulic pressure unit comprises right front-left back brake circuit and left front-right back brake circuit; Be respectively arranged with main road electromagnetic valve USV1, USV2, bypass electromagnetic valve HSV1, HSV2, each wheel turnover solenoid, oil pump, pump oil motor and low pressure accumulator on each bar brake circuit; The shared pump oil of right front-left back brake circuit and left front-right back brake circuit motor M; Wherein the wheel inlet valve comprises left rear wheel inlet valve LR_AV; Off front wheel inlet valve RF_AV, the near front wheel inlet valve LF_AV and off hind wheel inlet valve RR_AV, the wheel delivery valve comprises left rear wheel delivery valve LR_EV; Off front wheel delivery valve RF_EV, the near front wheel delivery valve LF_EV and off hind wheel delivery valve RR_EV.
Characteristics of the present invention are: be respectively arranged with the hydraulic control unit 5 that a pedal stroke simulator PS1 or PS2 formation have braking energy recovery function on the oil circuit between each bypass electromagnetic valve of vehicle stability controlled system hydraulic pressure unit and the pump oil motor; Each oil inlet I1 of hydraulic control unit 5, I2 pass through chargine line each oil outlet a, the b of corresponding connection master brake cylinder 1 respectively, and a master cylinder pressure sensor 6, the force value that is used to gather master brake cylinder 1 are set on wherein arbitrary chargine line; Each oil outlet 01,02,03 of hydraulic control unit 5 or 04 is through each wheel braking wheel cylinder of the corresponding connection of fuel-displaced pipeline difference; A front-wheel pressure of wheel braking cylinder sensor 7 is set, the force value that is used to gather the front-wheel wheel cylinder on the fuel-displaced pipeline between wherein arbitrary front-wheel oil outlet and the corresponding front-wheel wheel cylinder.Master cylinder pressure sensor 6 is gathered pressure signal respectively with front-wheel pressure of wheel braking cylinder sensor 7 and is sent in the brake controller (BCU) 8; Brake controller 8 is controlled each electromagnetic valve, pedal stroke simulator, oil pump and pump oil machine operation respectively according to pressure signal; And carrying out the CAN communication with entire car controller (VCU) 9 simultaneously, entire car controller 9 carries out CAN communication control drive motor 11 with electric machine controller (MCU) 10 simultaneously and brakes.
In the foregoing description; The present invention also comprises an electric vacuum pump 12, and wherein, master brake cylinder 1 connects brake pedal 3 through a master cylinder push rod 13; Be provided with vacuum booster 4 between master cylinder push rod 13 and the brake pedal 3, electric vacuum pump 12 connects vacuum booster 4 provides brake boost for it.For the pure electric vehicle hydraulic brake system, electric vacuum pump 12 carries out work all the time; To the motor vehicle driven by mixed power hydraulic brake system, if driving engine in running order (comprising idling mode), electric vacuum pump 13 does not need work, otherwise electric vacuum pump 12 need carry out work all the time.
Like Fig. 1, shown in Figure 2; Further specify the mode of operation that brake energy recovering system of the present invention has through specific embodiment below: the wheel speed signal of brake controller 8 real-time monitoring wheels; And carry out information interaction through the CAN bus with entire car controller 9; And according to signal that is obtained and information of vehicles; Judge current the master mode that should get into, brake controller 8 comprises five kinds of master modes: braking energy feedback master mode, ABS control pattern, braking energy reclaim and the integrated master mode of ABS, ASR master mode and ESP master mode.Because electro-motive vehicle is generally f-w-d, so following electro-motive vehicle with f-w-d is the working process that embodiment further specifies each master mode.
1, braking energy feedback master mode
1) entire car controller 9 monitor vehicle real-time running states (comprising status informations such as electrokinetic cell, drive motor and the speed of a motor vehicle); Calculate the drive motor 11 current maximum feedback moment values M0 that can provide, and maximum feedback moment values M0 is sent to brake controller 8 through the CAN bus.
2) master cylinder pressure sensor 6 and front-wheel pressure of wheel braking cylinder sensor 7 are distinguished the pressure value P 1 and front-wheel pressure of wheel braking cylinder value P2 of brake monitoring master cylinders, and above-mentioned two force value are sent to brake controller 8 respectively.
3) brake controller 8 calculates master cylinder pressure rate of change dP1/dt according to master cylinder pressure value P1; And the current maximum feedback moment values M0 that can provide of combination drive motor, master cylinder pressure value P1 and front-wheel pressure of wheel braking cylinder value P2; Calculate the current motor regenerative braking torque command value M1 that should be applied to front axle; And it is sent to entire car controller 9 through the CAN bus; Entire car controller 9 sends to electric machine controller 10 with motor regenerative braking torque command value M1 through the CAN bus, and electric machine controller 10 sends to brake controller 8 through the CAN bus through entire car controller 9 with the drive motor 11 current actual feedback moment values M2 that send.
4) as shown in Figure 2, brake controller 8 compares motor regenerative braking torque command value M1 and the current actual feedback moment values M2 of drive motor, supposes M3=M1-M2; When M3 equalled zero, 8 pairs of hydraulic control units 5 of brake controller sent front-wheel pressurize instruction, i.e. off front wheel inlet valve RF_EV and the near front wheel inlet valve LF_EV energising is closed, and realized that two front-wheel pressure of wheel braking cylinder keep.When M3 greater than zero the time; 8 pairs of hydraulic control units 5 of brake controller send front-wheel supercharging instruction; Be the size of brake controller 8, calculate the work duty command of pump oil motor M, the near front wheel inlet valve LF_EV and off front wheel inlet valve RF_EV respectively, and send it to hydraulic control unit 5 according to M3; The braking liquid that pump oil motor will be stored in the pedal stroke simulator pumps into the front-wheel wheel cylinder; Make the pressure of front-wheel wheel cylinder increase, the near front wheel inlet valve LF_EV and off front wheel inlet valve RF_EV are operated under the pulse duration modulation state simultaneously, thereby can realize the control of different rate of pressurizations.When M3 less than zero the time; 8 pairs of hydraulic control units 5 of brake controller send front-wheel decompression instruction, i.e. off front wheel inlet valve RF_EV and the near front wheel inlet valve LF_EV energising is closed, and brake controller 8 is according to the size of M3; Calculate the work duty command of pump oil motor M, the near front wheel delivery valve LF_AV and off front wheel delivery valve RF_AV respectively; And sending to hydraulic control unit 5, pump oil motor is extracted the braking liquid in the front-wheel wheel cylinder and be stored among low pressure accumulator A1, the A2 out, thereby makes the pressure of front-wheel wheel cylinder reduce; The near front wheel delivery valve LF_AV and off front wheel delivery valve RF_AV are operated under the pulse duration modulation state, thereby realize the control of different vacuum speed.
When the speed of a motor vehicle is reduced to a certain value; Drive motor 11 rotating speeds drop to a certain than low value thereupon; The feedback moment that drive motor can provide diminish rapidly (this by drive motor self character decision); Entire car controller 9 monitors and transmits a signal to brake controller 8 after this situation at once and withdraw from the braking energy feedback master mode with electric machine controller 10; Electric machine controller 10 controlling and driving motor feedback moments are reduced to zero rapidly, brake controller 8 reset all electromagnetic valves and pump oil motor, recovery hydraulic braking.
In sum, in the braking energy feedback master mode, when chaufeur is stepped on brake pedal 3; Main road electromagnetic valve USV1, USV2 energising are closed; Get into not on-state, bypass electromagnetic valve HSV1, HSV2 energising are opened, and get into conducting state; The near front wheel inlet valve LF_EV and off front wheel inlet valve RF_EV energising are closed, and get into not on-state.The braking liquid that flows out from master brake cylinder 1 this moment gets into trailing wheel wheel cylinder LR, RR, and the former braking liquid that should get into front-wheel wheel cylinder RF, LF then gets into pedal stroke simulator PS1 and PS2 respectively and is stored in wherein, has guaranteed the pedal sense of chaufeur.
2, ABS control pattern
When brake controller 8 has monitored wheel lockup trend; Suppose that this wheel is the near front wheel, at this moment, pump oil electrical power; The near front wheel inlet valve LF_EV energising is closed; And the near front wheel delivery valve LF_AV unlatching of switching on, the braking liquid among the near front wheel wheel cylinder LF is withdrawn into low pressure accumulator A2 and working connection (pipeline of the whole brake system between master brake cylinder and the wheel cylinder), realizes the near front wheel decompression control; When brake controller 8 monitors the disappearance of the near front wheel locking trend; The near front wheel inlet valve LF-EV and the near front wheel delivery valve LF-AV reset simultaneously; Because the working connection brake-pressure is higher; The near front wheel wheel cylinder brake-pressure is less, and braking liquid can instantaneously enter into left front wheel cylinder, realizes the near front wheel boost control; In the ABS control pattern, need carry out holding pressure control sometimes, the energising of oil-feed electromagnetic valve closed to realize holding pressure control.
3, braking energy reclaims and the integrated master mode of ABS
The control method of this master mode comprises two kinds, is respectively:
1) when the ABS control of access, regenerative braking is withdrawed from immediately
When brake controller 8 monitors need carry out ABS control the time; Brake controller 8 carries out communication notice entire car controller 9 through CAN bus and entire car controller 9 and gets into the ABS control pattern; Entire car controller 8 notice electric machine controllers 10 are kept to zero with the regenerative braking moment of drive motor 11 immediately, withdraw from the braking energy feedback master mode; When ABS control withdraws from; Brake controller 8 notice entire car controllers 9 recover the braking energy feedback master mode; And sending the current motor regenerative braking torque command value that should be applied to wheel, entire car controller 9 is notified electric machine controllers 10, electric machine controller 10 controlling and driving motors 11 loading motor regenerative braking torque command values; Adopt above-mentioned control method, brake controller 8, entire car controller 9 and electric machine controller 10 common realization regenerative brakings in the braking energy feedback master mode.
2) when the ABS control of access, regenerative braking power is participated in ABS control
When brake controller 8 monitors need carry out ABS control the time; Brake controller 8 carries out communication through CAN bus and entire car controller 9; Brake controller 8 notice entire car controllers 9 get into ABS control immediately, and entire car controller 9 notice electric machine controllers 10 get into ABS control immediately, and brake controller 8 is regulated the realization ABS control according to corresponding control policy to hydraulic braking force; Electric machine controller 10 is regulated the realization ABS control according to corresponding control policy to drive motor 11 regenerative braking power; When ABS control withdrawed from, brake controller 8 notice entire car controllers 9 recovered regenerative braking, adopt above-mentioned control method in the braking energy feedback master mode; Brake controller 8, entire car controller 9 and electric machine controller 10 common realization regenerative brakings; Wherein, corresponding control policy can adopt existing control methods such as logic threshold, repeats no more at this.
4, ASR master mode
ASR is called the anti-skidding control of driving, also often is called TCS.When vehicle adheres to when going on the road surface low, during the violent stepping on accelerator pedal of chaufeur, drive wheel can trackslip, and gets into the ASR master mode this moment.Thereby the ASR master mode can reduce its slip level through the wheel that trackslips is implemented braking; The detailed process of ASR master mode is: when certain drive wheel trackslips; With the off front wheel is example, and 8 pairs of hydraulic control units 5 of brake controller send control command, and main road electromagnetic valve USV1 energising is closed and got into not on-state, bypass electromagnetic valve HSV1 energising is opened and got into conducting state, pump oil machine operation; Braking liquid is pumped into the off front wheel wheel cylinder, thereby realize boost control off front wheel; When off front wheel trackslips when being reduced to a certain degree; Main road electromagnetic valve USV1 power down entering conducting state, bypass electromagnetic valve HSV1 power down get into not on-state, off front wheel inlet valve LF_EV energising is closed and is in not on-state, off front wheel delivery valve RF_AV energising entering conducting state, the oily machine operation of pump; With the braking liquid suction low pressure accumulator A1 in the off front wheel wheel cylinder, thereby realized decompression control to off front wheel; Holding pressure control and ABS pressurize to off front wheel are similar, only need off front wheel inlet valve LF_EV energising is closed and can be realized.
5, ESP master mode
In the vehicle ' process, brake controller 8 monitors vehicle to be had and breaks away or during whipping trend, 8 pairs of hydraulic control units 5 of brake controller send control command, and certain wheel is carried out control of braking and avoids breakking away or whipping trend.Because the working process of ESP master mode is to combine above-mentioned ABS and ASR control process to realize, can know according to the job analysis of above-mentioned ABS and ASR that therefore the present invention can realize ESP control fully.
Above-mentioned each embodiment only is used to explain the present invention, and wherein the structure of each parts and connection mode etc. all can change to some extent, and every equivalents of on the basis of technical scheme of the present invention, carrying out and improvement all should not got rid of outside protection scope of the present invention.
Claims (5)
1. vehicle braking energy recovery system; It is characterized in that: it comprises hydraulic vehicle brake system and vehicle stability controlled system hydraulic pressure unit; Said hydraulic vehicle brake system includes master brake cylinder, fluid reservoir, brake pedal, vacuum booster and wheel braking wheel cylinder; Said vehicle stability controlled system hydraulic pressure unit includes right front-left back brake circuit and left front-right back brake circuit; Include main road electromagnetic valve, bypass electromagnetic valve, each wheel turnover solenoid, oil pump and low pressure accumulator on each said brake circuit, the shared pump oil of two said brake circuits motor; On the oil circuit between each said bypass electromagnetic valve and the said pump oil motor pedal stroke simulator is set respectively and forms hydraulic control unit with braking energy recovery function; Each oil inlet of said hydraulic control unit is through each oil outlet of the said master brake cylinder of the chargine line corresponding connection of difference; On arbitrary said chargine line a master cylinder pressure sensor is set; Each oil outlet of said hydraulic control unit is through fuel-displaced pipeline each wheel braking wheel cylinder of corresponding connection respectively, on the fuel-displaced pipeline between wherein arbitrary front-wheel oil outlet and the corresponding front wheel cylinder front-wheel pressure of wheel braking cylinder sensor is set;
Said master cylinder pressure sensor and front-wheel pressure of wheel braking cylinder sensor are gathered pressure signal respectively and are sent to brake controller; Said brake controller is controlled each said electromagnetic valve, pedal stroke simulator, oil pump and pump oil machine operation respectively according to pressure signal under each master mode; And carrying out the CAN communication with entire car controller simultaneously, said entire car controller carries out CAN communication control drive motor with electric machine controller simultaneously and brakes.
2. a kind of vehicle braking energy recovery system as claimed in claim 1; It is characterized in that: it also includes an electric vacuum pump; Said master brake cylinder connects said brake pedal through a master cylinder push rod; Be provided with said vacuum booster between said master cylinder push rod and the said brake pedal, said electric vacuum pump connects said vacuum booster provides brake boost for it.
3. according to claim 1 or claim 2 a kind of vehicle braking energy recovery system, it is characterized in that: said brake controller comprises five kinds of master modes: braking energy feedback master mode, ABS control pattern, braking energy reclaim and the integrated master mode of ABS, ASR master mode and ESP master mode.
4. a kind of vehicle braking energy recovery system as claimed in claim 3 is characterized in that: the working process of said braking energy feedback master mode is:
1) entire car controller monitor vehicle real-time running state calculates the current maximum feedback moment values M0 that can provide of drive motor, and maximum feedback moment values M0 is sent to brake controller through the CAN bus;
2) master cylinder pressure sensor and front-wheel pressure of wheel braking cylinder sensor are distinguished the pressure value P 1 and front-wheel pressure of wheel braking cylinder value P2 of brake monitoring master cylinder, and it is sent to brake controller respectively;
3) brake controller calculates master cylinder pressure rate of change dP1/dt according to master cylinder pressure value P1; And combine the pressure value P 1 and the front-wheel pressure of wheel braking cylinder value P2 of maximum feedback moment values M0, master brake cylinder; Calculate the current motor regenerative braking torque command value M1 that should be applied to front axle; And it is sent to entire car controller through the CAN bus; Entire car controller sends to electric machine controller with motor regenerative braking torque command value M1 through the CAN bus, and electric machine controller sends to brake controller through the CAN bus through entire car controller with the current actual feedback moment values M2 that sends of drive motor;
4) brake controller compares motor regenerative braking torque command value M1 and the current actual feedback moment values M2 of drive motor, and sends front-wheel pressurize, supercharging and decompression instruction according to comparative result to hydraulic control unit and accomplish regenerative braking.
5. a kind of vehicle braking energy recovery system as claimed in claim 3 is characterized in that: said braking energy reclaims and the control method of the integrated master mode of ABS comprises two kinds: 1) when the ABS control of access, regenerative braking is withdrawed from immediately; 2) when the ABS control of access, regenerative braking power is participated in ABS control.
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| CN2012101886947A CN102700537A (en) | 2012-06-08 | 2012-06-08 | Vehicle braking energy recovery system |
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| CN2012101886947A CN102700537A (en) | 2012-06-08 | 2012-06-08 | Vehicle braking energy recovery system |
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| CN112744199A (en) * | 2019-10-31 | 2021-05-04 | 比亚迪股份有限公司 | Electro-hydraulic brake system, application method thereof and vehicle |
| CN111497805A (en) * | 2020-05-28 | 2020-08-07 | 武汉嘉琪新扬科技发展有限公司 | Hydraulic brake system for vehicle and control method thereof |
| CN111775914A (en) * | 2020-07-21 | 2020-10-16 | 西南石油大学 | Braking control method for rail electric engineering vehicle |
| CN112339734A (en) * | 2020-11-19 | 2021-02-09 | 宁波拓普集团股份有限公司 | Modular integrated brake-by-wire system |
| CN113879128A (en) * | 2021-11-04 | 2022-01-04 | 一汽解放汽车有限公司 | Brake control method and system for automatic driving flat car and computer equipment |
| CN114312714A (en) * | 2022-03-02 | 2022-04-12 | 万向钱潮股份有限公司 | Electronic wire control booster control system |
| CN117183751A (en) * | 2023-11-07 | 2023-12-08 | 华侨大学 | Safe and efficient regenerative braking system, control method and electric wheel type engineering machinery |
| CN117183751B (en) * | 2023-11-07 | 2024-04-16 | 华侨大学 | Safe and efficient regenerative braking system, control method and electric wheel type engineering machinery |
| CN118004113A (en) * | 2024-04-09 | 2024-05-10 | 万向钱潮股份公司 | Protection method for braking system |
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