CN102310850B - Electric vehicle braking system capable of reclaiming braking energy - Google Patents
Electric vehicle braking system capable of reclaiming braking energy Download PDFInfo
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- CN102310850B CN102310850B CN 201110160389 CN201110160389A CN102310850B CN 102310850 B CN102310850 B CN 102310850B CN 201110160389 CN201110160389 CN 201110160389 CN 201110160389 A CN201110160389 A CN 201110160389A CN 102310850 B CN102310850 B CN 102310850B
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Abstract
The invention discloses an electric vehicle braking system (EVBS) capable of reclaiming braking energy. The EVBS comprises a hydraulic braking subsystem, a braking energy reclaiming subsystem and a whole vehicle controller. The hydraulic braking subsystem comprises a braking pedal, a vacuum booster, a braking main cylinder, an oil storage chamber, an EVBS hydraulic unit, and an EVBS electric control unit for controlling the operation of the EVBS hydraulic unit; the braking energy reclaiming subsystem comprises a storage battery, a reversible motor controller, a motor, a transmission and a main speed reducer; and the whole vehicle controller is respectively connected with the EVBS electric control unit and the reversible motor controller. According to the system, a hydraulic brake and a motor reclaiming brake are coordinated; the whole vehicle controller cooperatively controls the reversible motor controller and the EVBS electric control unit, so that the braking safety is ensured; when the motor reclaiming brake fails, the hydraulic braking system can still work reliably; the whole hydraulic unit has a simple structure and is easy for batch production; and the EVBS has a consistent braking effect in a reclaiming or non-reclaiming state, and has the same braking sensation.
Description
Technical field
The present invention relates to braking system of electric car, especially relate to a kind of braking system of electric car that braking energy reclaims that carries out.
Background technology
The Faced In Sustainable Development energy of auto-industry and the dual-pressure of environmental protection, countries in the world are greatly developed for this reason has zero-emission, zero electronlmobil that pollutes.Yet the continual mileage that electronlmobil once charges is far smaller than traditional fuel-engined vehicle, and this deficiency has had a strong impact on electric vehicle industrialization and promoted rapidly.
The energy that consumes in the Motor Vehicle Braking Procedure of city operation surpasses the 40%-50% of automobile total energy consumption sometimes, and it is an important conservation measures of automobile that braking energy reclaims.Compare with the traditional combustion engine automobile, the various forms electronlmobil has increased the parts such as battery and motor, when car deceleration, motor is in the generating mode of operation, automobile is implemented braking, reclaim braking energy to rechargeable energy storage system (for example storage battery) or be used for vehicle-mounted annex work, for the enforcement of braking energy recovery technology provides prerequisite.Can not satisfy the requirement of car load braking force due to the braking torque of motor generation, and under different battery charge states, motor speed, the braking torque that motor produces alters a great deal, so must keep hydraulic brake system, and must coordinate hydraulic braking sysgtem and unify the relation of brake energy recovering system with the normal relation of assurance total braking force and brake pedal aperture.Simultaneously, under the premise that security is guaranteed, how guaranteeing that brake pedal has good brake feel when reclaiming the how co-ordination of brake system and EVBS system, hydraulic braking with the electrodynamic braking switching, is also a difficult point can carrying out the braking system of electric car of braking energy recovery.
Summary of the invention
In order to overcome the deficiency of background technology, the object of the present invention is to provide a kind of braking system of electric car (Electric Vehicle Braking System is called for short EVBS) that braking energy reclaims that carries out.
The technical solution used in the present invention:
This system comprises that hydraulic braking subsystem, braking energy reclaim subsystem and entire car controller; Wherein:
Hydraulic braking subsystem: the EVBS ECU (Electrical Control Unit) that comprises brake pedal, vacuum booster, oil cabinet, master brake cylinder, EVBS hydraulic pressure unit and the work of control EVBS hydraulic pressure unit; Brake pedal is connected with vacuum booster, vacuum booster is connected with master brake cylinder, master brake cylinder is connected with the EVBS hydraulic pressure unit with oil cabinet respectively, the EVBS hydraulic pressure unit also is connected with EVBS ECU (Electrical Control Unit) and four car side brakes, and the EVBS ECU (Electrical Control Unit) connects respectively brake switch, brake pedal position sensor and four wheel speed sensors;
Braking energy reclaims subsystem: comprise storage battery, reversible electric machine controller, motor, change-speed box and main reduction gear; Motor is connected with main reduction gear through change-speed box, and main reduction gear is connected with left and right front vehicle wheel respectively, and the reversible electric machine controller is connected with motor with storage battery respectively;
Entire car controller: connect respectively EVBS ECU (Electrical Control Unit), reversible electric machine controller and engine controller.
the EVBS hydraulic pressure unit of described hydraulic braking subsystem, the first liquid outlet of its master brake cylinder respectively with master cylinder the first pressure sensor, the first switch valve input end, second switch valve input end is connected with the first pressure charging valve input end, the first switch valve mouth is connected with the first high-speed switch valve input end with the first pedal simulation energy storage respectively, the first high-speed switch valve mouth is connected with the first oil pump input end with the first check valve mouth respectively, the first oil pump mouth is connected with the second pressure charging valve input end with second switch valve mouth respectively by the first high-tension damper, the first check valve input end respectively with the first low pressure accumulator, the first reducing valve mouth is connected with the second reducing valve mouth, the off hind wheel drg is connected with the first pressure charging valve mouth with the first reducing valve input end respectively, the near front wheel drg respectively with first round cylinder pressure transducer, the second reducing valve input end is connected with the second pressure charging valve mouth, the second liquid outlet of its master brake cylinder respectively with master cylinder the second pressure sensor, the 3rd switch valve input end, the 4th switch valve input end is connected with the 4th pressure charging valve input end, the 4th switch valve mouth is connected with the second high-speed switch valve input end with the second pedal simulation energy storage respectively, the second high-speed switch valve mouth is connected with the second oil pump input end with the second check valve mouth respectively, the second oil pump mouth is connected with the 3rd pressure charging valve input end with the 3rd switch valve mouth respectively by the second high-tension damper, the second check valve input end and the second low pressure accumulator, the 3rd reducing valve mouth is connected with the 4th reducing valve mouth, the left rear wheel drg is connected with the 4th pressure charging valve mouth with the 4th reducing valve input end respectively, the off front wheel drg respectively with the second pressure of wheel braking cylinder sensor, the 3rd reducing valve input end is connected with the 3rd pressure charging valve mouth, Oil pump electrical machinery is connected with the second oil pump with the first oil pump respectively.
Two pedal simulation accumulator structures in described hydraulic braking subsystem are identical, include piston spring, ladder piston, three seal rings, piston end cap and jump rings; In EVBS hydraulic pressure unit valve piece hole, the ladder piston is installed, piston spring is installed in the hole of ladder piston small end, the other end of piston spring and mounting hole end contact, piston end cap are arranged in the large end ladder mounting hole of EVBS hydraulic pressure unit valve piece; Be the liquid in-out mouth bottom the small end ladder mounting hole of EVBS hydraulic pressure unit valve piece, the logical atmosphere in large end ladder mounting hole bottom of EVBS hydraulic pressure unit valve piece; Between the large and small end of ladder piston and EVBS hydraulic pressure unit valve piece hole, first, second seal ring is set respectively; Between piston end cap and EVBS hydraulic pressure unit valve piece hole, the 3rd seal ring is set, piston end covers end jump ring is set.
The beneficial effect that the present invention has is:
(1) can maximally utilise motor and reclaim braking energy;
(2) change littlely on original ABS hydraulic brake system basis, cost is lower;
(3) hydraulic braking and motor reclaim brake coordination control, guarantee good brake feel;
(4) entire car controller is coordinated to control to reversible electric machine controller and EVBS ECU (Electrical Control Unit), guarantees braking safety;
(5) when motor reclaims braking failure, hydraulic brake system still can reliable operation;
(6) whole hydraulic pressure unit is simple in structure, is easy to batch manufacturing;
(7) no matter be in partially recycled, fully reclaim and still not reclaim state, braking effect is in full accord concerning the user, brake pedal feel is basic identical.
Description of drawings
Fig. 1 can carry out the braking system of electric car structural representation that energy reclaims.
Fig. 2 is EVBS hydraulic pressure unit schematic diagram of the present invention.
Fig. 3 is EVBS hydraulic pressure unit pedal simulation accumulator structure figure of the present invention.
in figure: 101, brake pedal, 102, brake switch, 103, brake pedal position sensor, 104, vacuum booster, 105, oil cabinet, 106, master brake cylinder, 107, right front wheel, 108, the off front wheel tachogen, 109, front left wheel, 110, the near front wheel tachogen, 111, the EVBS hydraulic pressure unit, 112, the EVBS ECU (Electrical Control Unit), 113, right rear wheel, 114, the off hind wheel tachogen, 115, left back wheel, 116, the left rear wheel tachogen, 117, engine controller, 118, entire car controller, 119, the reversible electric machine controller, 120, motor, 121, storage battery, 122, change-speed box, 123, main reduction gear, 201, master cylinder the first pressure sensor, 202, master cylinder the second pressure sensor, 203, the first switch valve, 204, the second switch valve, 205, the 3rd switch valve, 206, the 4th switch valve, 207, the first pedal simulation energy storage, 208, the first high-speed switch valve, 209, the first high-tension damper, 210, the first oil pump, 211, Oil pump electrical machinery, 212, the second high-tension damper, 213, the second oil pump, 214, the second high-speed switch valve, 215, the second pedal simulation energy storage, 216, the first check valve, 217, the second check valve, 218, the first low pressure accumulator, 219, the second low pressure accumulator, 220, the first reducing valve, 221, the first pressure charging valve, 222, the second reducing valve, 223, the second pressure charging valve, 224, the 3rd reducing valve, 225, the 3rd pressure charging valve, 226, the 4th reducing valve, 227, increase the 4th pressure valve, 228, first round cylinder pressure transducer, 229, the second pressure of wheel braking cylinder sensor, 301, EVBS hydraulic pressure unit valve piece, 302, jump ring, the 303, first seal ring, 304, the piston end cap, the 305, second seal ring, 306, the ladder piston, the 307, the 3rd seal ring, 308, piston spring.
The specific embodiment
The invention will be further described below in conjunction with the drawings and specific embodiments.
Fig. 1 can carry out the braking system of electric car structural representation that energy reclaims.This system comprises that hydraulic braking subsystem, braking energy reclaim subsystem and entire car controller 118; Wherein:
Hydraulic braking subsystem: comprise brake pedal 101, vacuum booster 104, oil cabinet 105 master brake cylinders 106, EVBS hydraulic pressure unit 111 and control the EVBS ECU (Electrical Control Unit) 112 that EVBS hydraulic pressure unit 111 is worked; Brake pedal 101 is connected with vacuum booster 104, vacuum booster 104 is connected with master brake cylinder 106, master brake cylinder 106 is connected with EVBS hydraulic pressure unit 111 with oil cabinet 105 respectively, EVBS hydraulic pressure unit 111 also is connected with EVBS ECU (Electrical Control Unit) 112 and four car side brakes, and EVBS ECU (Electrical Control Unit) 112 connects respectively brake switch 102, brake pedal position sensor 103 and four wheel speed sensors 108,110,114,116;
Braking energy reclaims subsystem: comprise storage battery 121, reversible electric machine controller 119, motor 120, change-speed box 122 and main reduction gear 123; Motor 120 is connected with main reduction gear 123 through change-speed box 122, and main reduction gear 123 is connected with left and right front vehicle wheel 107,109 respectively, and reversible electric machine controller 119 is connected with motor 120 with storage battery 121 respectively;
Entire car controller 118: connect respectively EVBS ECU (Electrical Control Unit) 112, reversible electric machine controller 119 and engine controller 117.
Fig. 2 is EVBS hydraulic pressure unit schematic diagram of the present invention.the EVBS hydraulic pressure unit 111 of described hydraulic braking subsystem, the first liquid outlet of its master brake cylinder 106 respectively with master cylinder the first pressure sensor 201, the first switch valve 203 input ends, second switch valve 204 input ends are connected with the first pressure charging valve 221 input ends, the first switch valve 203 mouths are connected with the first high-speed switch valve 208 input ends with the first pedal simulation energy storage 207 respectively, the first high-speed switch valve 208 mouths are connected with the first oil pump 210 input ends with the first check valve 216 mouths respectively, the first oil pump 210 mouths are connected with the second pressure charging valve 223 input ends with second switch valve 204 mouths respectively by the first high-tension damper 209, the first check valve 216 input ends respectively with the first low pressure accumulator 218, the first reducing valve 220 mouths are connected with the second reducing valve 222 mouths, the off hind wheel drg is connected with the first pressure charging valve 221 mouths with the first reducing valve 220 input ends respectively, the near front wheel drg respectively with first round cylinder pressure transducer 228, the second reducing valve 222 input ends are connected with the second pressure charging valve 223 mouths, the second liquid outlet of its master brake cylinder 106 respectively with master cylinder the second pressure sensor 202, the 3rd switch valve 205 input ends, the 4th switch valve 206 input ends are connected with the 4th pressure charging valve 227 input ends, the 4th switch valve 206 mouths are connected with the second high-speed switch valve 214 input ends with the second pedal simulation energy storage 215 respectively, the second high-speed switch valve 214 mouths are connected with the second oil pump 213 input ends with the second check valve 217 mouths respectively, the second oil pump 213 mouths are connected with the 3rd pressure charging valve 225 input ends with the 3rd switch valve 205 mouths respectively by the second high-tension damper 212, the second check valve 217 input ends and the second low pressure accumulator 219, the 3rd reducing valve 224 mouths are connected with the 4th reducing valve 226 mouths, the left rear wheel drg is connected with the 4th pressure charging valve 227 mouths with the 4th reducing valve 226 input ends respectively, the off front wheel drg respectively with the second pressure of wheel braking cylinder sensor 229, the 3rd reducing valve 224 input ends are connected with the 3rd pressure charging valve 225 mouths, Oil pump electrical machinery 211 is connected with the second oil pump 213 with the first oil pump 210 respectively.
Fig. 3 is EVBS hydraulic pressure unit pedal simulation accumulator structure figure of the present invention.Two pedals simulation accumulator structures in described hydraulic braking subsystem are identical, include piston spring 308, ladder piston 306, three seal rings 305,307,303, piston end cap 304 and jump ring 302; In EVBS hydraulic pressure unit 111 valve piece holes, ladder piston 306 is installed, piston spring 308 is installed in the hole of ladder piston 306 small ends, the other end of piston spring 308 and mounting hole end contact, piston end cap 304 are arranged in the large end ladder mounting hole of EVBS hydraulic pressure unit 111 valve pieces; Be the liquid in-out mouth bottom the small end ladder mounting hole of EVBS hydraulic pressure unit 111 valve pieces, the logical atmosphere in large end ladder mounting hole bottom of EVBS hydraulic pressure unit 111 valve pieces; The large and small end of ladder piston 306 and EVBS hydraulic pressure unit arrange respectively first, second seal ring 305,307 between 111 valve piece holes; Piston end cap 304 and EVBS hydraulic pressure unit arrange the 3rd seal ring 303 between 111 valve piece holes, and piston end cap 304 upper ends arrange jump ring 302.
The liquid in-out mouth pressure acts on piston spring 308 by ladder piston 307, and along with the liquid in-out mouth pressure raises or reduces, piston spring 308 is compressed or uphold, and hydraulic oil enters or flows out pedal simulation energy storage 207,215.This pedal simulation accumulator structure is simple, and volume is little, and reliability is high.
The EVBS ECU (Electrical Control Unit) is according to brake pedal position sensor signal acquisition braking requirement information, the reversible electric machine controller obtains according to status signals such as storage battery, motor speeds the maximum braking force information that motor can provide, described entire car controller is according to above-mentioned information, carry out brakig force distribution, assign torque command for the reversible electric machine controller, machine operation is in generating state, the braking torque that produces is through change-speed box, main reduction gear, be delivered on wheel, produced simultaneously electric energy is fed back to storage battery through the reversible electric machine controller, realizes that braking energy reclaims.Entire car controller is issued an order to the EVBS hydraulic pressure unit by the EVBS ECU (Electrical Control Unit), controls the master brake cylinder pressure portion or all acts on wheel.
From actuating unit action aspect, as Fig. 1, Fig. 2, shown in Figure 3, specifically be implemented as follows:
In car running process, step on brake pedal 101, master brake cylinder 106 produces brake-pressure, by EVBS hydraulic pressure unit 111, enters each car side brake, produces friction brake force.the pressure that obtains when master cylinder the first pressure sensor and master cylinder the second pressure sensor is during greater than a certain less pressure, the first switch valve 203, second switch valve 204, the 3rd switch valve 205, the 4th switch valve 206 is worked under 112 instructions of EVBS ECU (Electrical Control Unit) simultaneously, the first switch valve 203 is open-minded, second switch valve 204 cuts out, the 3rd switch valve 205 is closed, the 4th switch valve 206 is open-minded, the first pressure charging valve 221 cuts out, the 4th pressure charging valve 227 cuts out, respectively take turns brake-pressure this moment no longer increases, increase braking force by 120 pairs of left and right front-wheels of motor, the hydraulic oil of master brake cylinder 106 enters the first pedal simulation energy storage 207, the second pedal simulation energy storage 215, this moment, the aperture along with brake pedal 101 increased, ladder piston 306 compression piston springs 308, this kind structure is convenient to realize that the large pressure of low discharge changes control, when motor 120 brakings can not be satisfied brake request, the first switch valve 203 is still open-minded, second switch valve 204 still cuts out, the 3rd switch valve 205 is still closed, the 4th switch valve 206 is still open-minded, EVBS ECU (Electrical Control Unit) 112 control the first pressure charging valves 221 and the 4th pressure charging valve 227 are open-minded, the left and right trailing wheel is realized supercharging, when need increase hydraulic braking force, EVBS ECU (Electrical Control Unit) 112 is sent left and right front-wheel supercharging instruction, the first switch valve 203 is closed, the 4th switch valve 206 is closed, second switch valve 204 cuts out, the 3rd switch valve is closed, to high- speed switch valve 208, 214 carry out pulse width modulation controls, make simultaneously Oil pump electrical machinery 211 work, the first oil pump 210 work, by the first high-tension damper 209, the second pressure charging valve 223, realize the near front wheel supercharging, when shown in master cylinder the first pressure sensor 201, shown in pressure and first round cylinder pressure transducer 228, pressure is close, second switch valve 204 is open-minded, the second Oil pump electrical machinery 213 work, by the second high-tension damper 212, the 3rd pressure charging valve 225, realize the off front wheel supercharging, when shown in master cylinder the second pressure sensor 202, shown in pressure and the second pressure of wheel braking cylinder sensor 229, pressure was close, the 3rd switch valve 205 was open-minded.When needs reduce pressure, regain brake pedal 101, master brake cylinder 106 brake-pressures reduce, and the first switch valve 203, second switch valve 204, the 3rd switch valve 205, the 4th switch valve 206 return to normal; During less than a less definite value, the first switch valve 203 is opened, the 4th switch valve 206 is open-minded when brake pedal position sensor 103 signals, and the raffinate force feeds in the first pedal simulation energy storage 207, the second pedal simulation energy storage 215 are returned to master brake cylinder 106.
above-mentioned braking procedure is completed under entire car controller 118 is coordinated, EVBS ECU (Electrical Control Unit) 112 obtains braking requirement information according to brake pedal position sensor 103, reversible electric machine controller 119 is according to storage battery 121, the status signals such as motor 120 rotating speeds obtain the maximum braking force information that motor can provide, entire car controller 118 is according to above-mentioned information, carry out brakig force distribution, assign torque command for reversible electric machine controller 119, motor 120 braking torques are through change-speed box 122, main reduction gear 123, be delivered on wheel, issue an order also for simultaneously EVBS ECU (Electrical Control Unit) 112, master brake cylinder 106 pressure partly or entirely act on wheel through the hydraulic pressure unit 111 of EVBS.
When carrying out supercharging, it is to have good brake feel in order to ensure chaufeur that high-speed switch valve 208,214 is carried out PWM control purpose.
From the control policy aspect, utilize Fig. 1, Fig. 2, Fig. 3, specifically be implemented as follows:
in the situation that locking does not occur in wheel, EVBS ECU (Electrical Control Unit) 112 is according to the size of brake pedal sensor 103 signals, calculate the braking force size of expectation, and according to master cylinder the first pressure sensor 201, master cylinder the second pressure sensor 202, first round cylinder pressure transducer 228, the second pressure of wheel braking cylinder sensor 229 calculates each wheel hydraulic braking force size, reversible electric machine controller 119 is according to storage battery 121 simultaneously, the status signals such as motor 120 rotating speeds, calculate the maximum braking force size that motor 120 provides, entire car controller 118 receives the braking force size of expectation from EVBS ECU (Electrical Control Unit) 112 and reversible electric machine controller 119, after the information such as the maximum braking force size that motor 120 provides, it is analyzed, process, judgement, make decisions at last, hydraulic braking force and motor 120 braking forces are redistributed.when brake pedal 101 apertures less (slight braking), the maximum braking force that motor 120 provides can satisfy brake request, each wheel only keeps less hydraulic braking force, for when motor 120 can not satisfy brake request like this, hydraulic braking gets involved fast, improve braking response speed, mainly provide braking force by motor 120 this moment, when brake pedal 101 apertures large (average braking), the maximum braking force that motor 120 provides can not satisfy brake request, EVBS ECU (Electrical Control Unit) 112 calculates the braking force size of expectation, and according to ideal braking force distribution curve (Yu Zhisheng edits " automobile theory " that China Machine Press publishes), calculate the size of required front and back wheel braking force, entire car controller 118 is according to above-mentioned information, send instruction to EVBS ECU (Electrical Control Unit) 112 and reversible electric machine controller 119 respectively, 112 pairs of front-wheel hydraulic braking force of EVBS ECU (Electrical Control Unit), the trailing wheel hydraulic braking force is regulated, the braking force that 119 pairs of motors 120 of reversible electric machine controller provide is regulated, the braking force sum that front-wheel hydraulic braking force and motor 120 are provided, the trailing wheel hydraulic braking force both ratio near the allocation proportion of ideal braking force distribution curve, when brake pedal 101 apertures very large (emergency braking), motor 120 brakings are progressively withdrawed from, and the hydraulic pressure unit 111 that EVBS ECU (Electrical Control Unit) 112 is controlled EVBS increases hydraulic braking force fast.
In the situation that wheel generation locking, EVBS ECU (Electrical Control Unit) 112 is according to each wheel speed sensor 108,110,114,116 information, judge the situation of wheel generation locking, this moment, EVBS ECU (Electrical Control Unit) 112 was carried out the adjusting of front and back wheel pressure by the hydraulic pressure unit 111 of EVBS, reduce to occur the braking force of locking wheel, simultaneously by entire car controller 118, reversible electric machine controller 119 is sent instruction, reduce the braking force that motor 120 provides, meanwhile the hydraulic pressure unit 111 of EVBS, progressively increase the front-wheel hydraulic braking force.
Above-described embodiment is to explanation of the present invention, is not limitation of the present invention, and any structure after simple transformation on basis of the present invention all belongs to protection scope of the present invention.
Claims (2)
1. one kind can be carried out the braking system of electric car that braking energy reclaims, and it is characterized in that: this system comprises that hydraulic braking subsystem, braking energy reclaim subsystem and entire car controller (118); Wherein:
Hydraulic braking subsystem: comprise brake pedal (101), vacuum booster (104), oil cabinet (105), master brake cylinder (106), EVBS hydraulic pressure unit (111) and control the EVBS ECU (Electrical Control Unit) (112) that EVBS hydraulic pressure unit (111) is worked; Brake pedal (101) is connected with vacuum booster (104), vacuum booster (104) is connected with master brake cylinder (106), master brake cylinder (106) is connected with EVBS hydraulic pressure unit (111) with oil cabinet (105) respectively, EVBS hydraulic pressure unit (111) also is connected with EVBS ECU (Electrical Control Unit) (112) and four car side brakes, and EVBS ECU (Electrical Control Unit) (112) connects respectively brake switch (102), brake pedal position sensor (103) and four wheel speed sensors (108,110,114,116);
Braking energy reclaims subsystem: comprise storage battery (121), reversible electric machine controller (119), motor (120), change-speed box (122) and main reduction gear (123); Motor (120) is connected with main reduction gear (123) through change-speed box (122), and main reduction gear (123) is connected with left and right front vehicle wheel (107,109) respectively, and reversible electric machine controller (119) is connected with motor (120) with storage battery (121) respectively;
Entire car controller (118): connect respectively EVBS ECU (Electrical Control Unit) (112), reversible electric machine controller (119) and engine controller (117);
the EVBS hydraulic pressure unit (111) of described hydraulic braking subsystem, first liquid outlet of its master brake cylinder (106) respectively with master cylinder the first pressure sensor (201), the first switch valve (203) input end, second switch valve (204) input end is connected with the first pressure charging valve (221) input end, the first switch valve (203) mouth is connected with the first high-speed switch valve (208) input end with the first pedal simulation energy storage (207) respectively, the first high-speed switch valve (208) mouth is connected with the first oil pump (210) input end with the first check valve (216) mouth respectively, the first oil pump (210) mouth is connected with the second pressure charging valve (223) input end with second switch valve (204) mouth respectively by the first high-tension damper (209), the first check valve (216) input end respectively with the first low pressure accumulator (218), the first reducing valve (220) mouth is connected with the second reducing valve (222) mouth, the off hind wheel drg is connected with the first pressure charging valve (221) mouth with the first reducing valve (220) input end respectively, the near front wheel drg respectively with first round cylinder pressure transducer (228), the second reducing valve (222) input end is connected with the second pressure charging valve (223) mouth, second liquid outlet of its master brake cylinder (106) respectively with master cylinder the second pressure sensor (202), the 3rd switch valve (205) input end, the 4th switch valve (206) input end is connected with the 4th pressure charging valve (227) input end, the 4th switch valve (206) mouth is connected with the second high-speed switch valve (214) input end with the second pedal simulation energy storage (215) respectively, the second high-speed switch valve (214) mouth is connected with the second oil pump (213) input end with the second check valve (217) mouth respectively, the second oil pump (213) mouth is connected with the 3rd pressure charging valve (225) input end with the 3rd switch valve (205) mouth respectively by the second high-tension damper (212), the second check valve (217) input end and the second low pressure accumulator (219), the 3rd reducing valve (224) mouth is connected with the 4th reducing valve (226) mouth, the left rear wheel drg is connected with the 4th pressure charging valve (227) mouth with the 4th reducing valve (226) input end respectively, the off front wheel drg respectively with the second pressure of wheel braking cylinder sensor (229), the 3rd reducing valve (224) input end is connected with the 3rd pressure charging valve (225) mouth, Oil pump electrical machinery (211) is connected with the second oil pump (213) with the first oil pump (210) respectively.
2. a kind of braking system of electric car that braking energy reclaims that carries out according to claim 1, it is characterized in that: two pedal simulation accumulator structures in described hydraulic braking subsystem are identical, include piston spring (308), ladder piston (306), three seal rings (305,307,303), piston end cap (304) and jump ring (302); In EVBS hydraulic pressure unit (111) valve piece hole, ladder piston (306) is installed, piston spring (308) is installed in the hole of ladder piston (306) small end, the small end ladder mounting hole end contact of the other end of piston spring (308) and EVBS hydraulic pressure unit (111) valve piece, piston end cap (304) are arranged in the large end ladder mounting hole of EVBS hydraulic pressure unit (111) valve piece; Be the liquid in-out mouth bottom the small end ladder mounting hole of EVBS hydraulic pressure unit (111) valve piece, the logical atmosphere in large end ladder mounting hole bottom of EVBS hydraulic pressure unit (111) valve piece; Between the large and small end of ladder piston (306) and EVBS hydraulic pressure unit (111) valve piece hole, first, second seal ring (305,307) is set respectively; Between piston end cap (304) and EVBS hydraulic pressure unit (111) valve piece hole, the 3rd seal ring (303) is set, piston end cap (304) upper end arranges jump ring (302).
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| CN103693034A (en) * | 2013-07-15 | 2014-04-02 | 南京工程学院 | Electro-hydraulic proportional valve control pump/motor hydraulic power assisted system of electric automobile |
| CN104442414B (en) * | 2014-11-13 | 2017-03-22 | 奇瑞汽车股份有限公司 | Brake energy recycling control method |
| CN106828119B (en) * | 2017-01-11 | 2018-12-18 | 电子科技大学 | A kind of braking system and braking method for taking into account feedback efficiency and brake efficiency |
| CN109130887A (en) * | 2018-09-20 | 2019-01-04 | 北京新能源汽车股份有限公司 | A kind of electric braking compensating control method, control device and automobile |
| DE102020207787A1 (en) * | 2020-06-23 | 2021-12-23 | Hawe Hydraulik Se | Hydraulic lifting device for a chassis of a mobile device, chassis and mobile device |
| CN111775910A (en) * | 2020-07-22 | 2020-10-16 | 一汽解放汽车有限公司 | Brake system of new-energy commercial vehicle |
| CN112977379A (en) * | 2021-04-14 | 2021-06-18 | 一汽解放汽车有限公司 | Braking system and vehicle |
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| CN101941430A (en) * | 2010-07-05 | 2011-01-12 | 清华大学 | Hydraulic braking system of four-wheel driven electric vehicle |
| CN202156406U (en) * | 2011-06-15 | 2012-03-07 | 浙江亚太机电股份有限公司 | Electric vehicle braking system capable of recovering brake energy |
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| CN102310850A (en) | 2012-01-11 |
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Application publication date: 20120111 Assignee: Bei Jinghai Na Chuan automobile chassis System Co., Ltd Assignor: Zhejiang Yatai Mechanical & Electrical Co., Ltd. Contract record no.: 2014990000295 Denomination of invention: Electric vehicle braking system capable of reclaiming braking energy Granted publication date: 20130522 License type: Exclusive License Record date: 20140514 |
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