CN100491153C - Composite braking system for electric automobile - Google Patents
Composite braking system for electric automobile Download PDFInfo
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- CN100491153C CN100491153C CNB2006101135868A CN200610113586A CN100491153C CN 100491153 C CN100491153 C CN 100491153C CN B2006101135868 A CNB2006101135868 A CN B2006101135868A CN 200610113586 A CN200610113586 A CN 200610113586A CN 100491153 C CN100491153 C CN 100491153C
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- 239000002131 composite material Substances 0.000 title claims description 16
- 238000011084 recovery Methods 0.000 claims abstract description 6
- 230000009467 reduction Effects 0.000 claims description 10
- 238000000034 method Methods 0.000 abstract description 4
- 230000005540 biological transmission Effects 0.000 abstract 1
- 230000008859 change Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000003137 locomotive effect Effects 0.000 description 1
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- 230000033772 system development Effects 0.000 description 1
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Abstract
This invention publicizes a technique within the filed of electric motor vehicle braking about a hybrid braking system of the electric motor vehicle. It includes pneumatic braking sub system and recovering braking sub system. Pneumatic braking sub system includes a braking pedal and a connected pressure control valve, pressure holding linkage, ABS components, braking controller linkage; recovery braking system comprises of an electric motor that has recovery braking functions and that links with the wheel through transmissions and major decelerator, and a braking controller that connects the battery via the electric motor controller and sends control directions to the electric motor controller. This invention can best actuate the electric motor recovery braking and maximize the recovery braking energy; harmonizing control of pneumatic braking power and electric motor braking power to keep fine braking and the harmonizing control of braking controller and ABS controller to ensure braking security.
Description
Technical field
The invention belongs to electronlmobil braking technology scope, particularly in, a kind of composite braking system for electric automobile of heavy motor vehicle Pneumatic braking system.
Background technology
Electronlmobil can realize that more easily braking energy reclaims than diesel locomotive owing to have motor and stored energy mechanisms such as storage battery, super capacitor.Braking energy reclaim what the economy and the continual mileage of electronlmobil had bigger influence.Because the braking force that motor provides generally can not satisfy the demand of car load braking force, so electronlmobil has also kept original pneumatic or hydraulic brake system.Reclaim brake system and original pneumatic or hydraulic brake system has been formed composite braking system.
Composite braking system will be taken into account braking safety, brake feel, needs to reclaim as much as possible braking energy simultaneously.Under different storage battery state-of-charge, bus voltage and motor speeds, the braking torque that motor can send changes in a big way, therefore need control original pneumatic or hydraulic brake system, coordinate to reclaim brake system and pneumatic or hydraulic brake system to guarantee the relation of total braking force and brake pedal aperture.Simultaneously, how composite braking system works with the ABS system coordination, ensures the car load braking safety, is one of difficult point of composite braking system.
Summary of the invention
The objective of the invention is to overcome the deficiency of prior art, propose a kind of composite braking system for electric automobile, described composite braking system for electric automobile comprises reclaiming brakes subsystem and pneumatic braking sub system; Described pneumatic braking sub system comprises brake pedal and the pressure-gradient control valve that links with it; Described recovery braking subsystem comprises having motor, change-speed box, main reduction gear, electric machine controller, wheel, storage battery and the brake controller that reclaims braking function; Motor is connected with main reduction gear by change-speed box, and main reduction gear is connected with wheel, electric machine controller connects storage battery and motor respectively, and electric machine controller also is connected with the brake controller that sends control command to electric machine controller; It is characterized in that one side of described pressure-gradient control valve is connected with pressure holding, the another side of pressure-gradient control valve is connected with ABS parts group, brake controller respectively by pressure-modulation valve; And ABS parts group connects abs control valve, wheel speed sensors and accident warning device respectively by abs controller and constitutes; Abs controller also is connected with brake controller.
Described brake controller is assigned torque command according to the status signal of brake pedal jaw opening sensor, storage battery, bus sensors to electric machine controller, and the motor braking torque is delivered on the drive wheel by change-speed box, main reduction gear.
Described pressure-modulation valve adopts the same two-bit triplet valve arrangement with abs control valve.
Described pressure holding comprises storage tank, air compressor.
The invention has the beneficial effects as follows: (1) uses motor to reclaim braking as far as possible, and maximum possible reclaims braking energy; (2) change is less on former traditional combustion engine car Pneumatic braking system, low system development costs and realization difficulty; (3) aerobraking power and motor braking power co-operative control guarantee good brake feel; (4) brake controller and abs controller co-operative control guarantee braking safety.
Description of drawings
Fig. 1 is the composite braking system for electric automobile structural representation.
Fig. 2 is the two-bit triplet valve arrangement.
The specific embodiment
A kind of composite braking system for electric automobile of the present invention.Its composite braking system structural representation as shown in Figure 1, this composite braking system for electric automobile comprises pneumatic braking sub system and reclaims the braking subsystem.Pneumatic braking sub system comprises brake pedal 14 and is connected with storage tank 12, air compressor 11 as pressure holding with the right of its pressure-gradient control valve that links 13, pressure-gradient control valve 13, the left side of pressure-gradient control valve 13 is connected with abs control valve 18 by pressure-modulation valve 16, and ABS parts group comprises abs controller 9, wheel speed sensors 10, abs control valve 18 and accident warning device 8; Reclaim brake system comprise have the motor 5 that reclaims braking function, motor 5 by change-speed box 6 be connected with axletree with main reduction gear 7, by electric machine controller 4 connection storage batterys 2 and the brake controller 1 that electric machine controller 4 sent control command.
In car running process, pressurized air remains on a constant compression force scope in the storage tank 12 of the pressure-keeping mechanism by comprising air compressor 11.Brake pedal 14 is stepped on, and the pressurized air in the storage tank 12 enters and respectively takes turns drg by the pressure control of pressure-gradient control valve 13, pressure-modulation valve 16 and abs control valve 18, produces friction brake force.Wherein, pressure-gradient control valve 13 is subjected to the control of brake pedal 14, and pressure-modulation valve 16 is subjected to the control of brake controller 1, and abs control valve 18 is subjected to the control of abs controller 9.Simultaneously, brake controller 1 assigns torque command for electric machine controller 4 according to the status signal of brake pedal jaw opening sensor 15, storage battery 2, bus sensors 3 etc., and the motor braking torque is delivered on the drive wheel (trailing wheel) by change-speed box 6, main reduction gear 7.
What above-mentioned pressure-gradient control valve adopted is binary channel machinery pressure regulating valve, according to the difference of pressure before and after the brake-pedal travel decision valve, thus the pressure of control front and back wheel.Pressure-modulation valve adopts the same two-position three-way valve with abs control valve, and structure as shown in Figure 2.
As shown in Figure 2, this valve comprises air inlet electromagnetic valve 21 and exhaust solenoid valve 19, by the various combination of two valve opening solenoids of inlet and outlet, off status, can realize the rising and the decline of pipeline downstream pressure.By controlling the switching time of two electromagnetic valves, size that can the control cock downstream pressure.This two-position three-way valve is one of assembly of ABS matured product on the market, and speed of response and reliability are guaranteed.
Do not take place under the locking situation at wheel, abs controller 9 control abs control valves 18 are failure to actuate, and gas circuit is communicated with before and after the abs controller 9 control abs valves.Size according to brake pedal 14 apertures, brake controller 1 calculates the demand braking force of chaufeur, and the gaseous tension behind the pressure-gradient control valve, in the pressure-modulation valve front loop, simultaneously, brake controller is according to battery condition, bus voltage and rotating speed of motor, calculate motor the maximum braking torque that can provide.When the brake pedal aperture not quite (was slightly braked), the braking torque of motor can satisfy the demands, and the pressure that motor braking controller control presssure control cock is braked front and back in the major loop is cancelled, and does not carry out friction braking, provides braking force by motor fully; When brake pedal aperture big (average braking), the braking torque of motor can not satisfy the demands, brake controller calculates the size of the Pneumatic friction braking force that needs, and distribute (braking " curve " reference " automobile theory " according to braking " curve ", Yu Zhisheng, China Machine Press) braking force of front and back wheel, pressure before and after the control brake control cock is regulated in the brake circuit makes the allocation proportion of the ratio of front-wheel Pneumatic friction braking force, trailing wheel friction brake force and motor braking power sum near " curve "; When brake pedal aperture very big (emergency braking), because the emergency braking process is shorter, motor does not participate in reclaiming braking, is communicated with before and after the brake controller control presssure control cock, adopts the Pneumatic friction braking fully.
When wheel generation locking situation, abs controller calculates the locking situation of wheel by wheel speed sensors, controls abs control valve simultaneously and carries out pressure control, reduces the braking force of locking wheel.Because the size of motor braking torque is not subjected to the control of abs controller, braking force is excessive causes the drive wheel locking in order to prevent to reclaim, when abs controller is found the wheel lockup situation, brake controller carries out co-operative control, reduce motor rapidly and reclaim braking torque, the control presssure control cock progressively increases the Pneumatic friction braking force simultaneously.
Adopt the characteristics of this control method to be: (1) reclaims braking energy to greatest extent; (2) except slightly In other situation of braking, the brake force of front and back wheel is near " I curve ", adhesion coefficient utilization height; (3) ABS System further guarantees braking safety; When the torque that (4) can send when motor changes, Pneumatic friction The brake force respective change, the size of total braking force is corresponding with the brake pedal aperture, and brake feel is good.
Claims (2)
1. composite braking system for electric automobile, described composite braking system for electric automobile comprise and reclaim braking subsystem and pneumatic braking sub system; Described pneumatic braking sub system comprises brake pedal and the pressure-gradient control valve that links with it; Described recovery braking subsystem comprises having motor, change-speed box, main reduction gear, electric machine controller, wheel, storage battery and the brake controller that reclaims braking function; Motor is connected with main reduction gear by change-speed box, and main reduction gear is connected with wheel, electric machine controller connects storage battery and motor respectively, and electric machine controller also is connected with the brake controller that sends control command to electric machine controller; It is characterized in that one side of described pressure-gradient control valve is connected with pressure holding, the another side of pressure-gradient control valve is connected with ABS parts group, brake controller respectively by pressure-modulation valve; And ABS parts group connects abs control valve, wheel speed sensors and accident warning device respectively by abs controller and constitutes; Abs controller also is connected with brake controller.
2. according to the described composite braking system for electric automobile of claim 1, it is characterized in that, described brake controller is according to the status signal of brake pedal jaw opening sensor, storage battery, bus sensors, assign torque command to electric machine controller, the motor braking torque is delivered on the drive wheel by change-speed box, main reduction gear.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006101135868A CN100491153C (en) | 2006-10-08 | 2006-10-08 | Composite braking system for electric automobile |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006101135868A CN100491153C (en) | 2006-10-08 | 2006-10-08 | Composite braking system for electric automobile |
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| Publication Number | Publication Date |
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| CN1923559A CN1923559A (en) | 2007-03-07 |
| CN100491153C true CN100491153C (en) | 2009-05-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB2006101135868A Expired - Fee Related CN100491153C (en) | 2006-10-08 | 2006-10-08 | Composite braking system for electric automobile |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102166962A (en) * | 2011-03-29 | 2011-08-31 | 重庆长安汽车股份有限公司 | Brake energy feedback control system of pure electric automobile |
| WO2012129891A2 (en) * | 2011-03-29 | 2012-10-04 | 重庆长安汽车股份有限公司 | Method and system for feedback control of braking energy in pure electric vehicle |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101319690A (en) * | 2007-06-08 | 2008-12-10 | 谢兴云 | Variable force pusher used for brake |
| CN101474965B (en) * | 2009-01-20 | 2010-11-10 | 清华大学 | Active brake control method of hybrid power electric automobile |
| KR101636080B1 (en) | 2009-12-24 | 2016-07-04 | 두산인프라코어 주식회사 | Method for controlling inverter for turning motor |
| CN101982339B (en) * | 2010-10-19 | 2012-12-19 | 福建省福工动力技术股份公司 | Recovery device of regenerative braking energy |
| US8437937B2 (en) * | 2010-11-01 | 2013-05-07 | GM Global Technology Operations LLC | Blended braking management in powertrain systems |
| CN102336142A (en) * | 2011-09-06 | 2012-02-01 | 上海中科深江电动车辆有限公司 | ABS (anti-lock brake system) based regenerative braking control method for electric vehicle |
| CN102424003B (en) * | 2011-10-21 | 2014-04-02 | 清华大学 | Parallel control system for recovering brake energy of electric bus and control method thereof |
| CN103738327B (en) * | 2014-01-14 | 2015-09-16 | 东风汽车公司 | Based on the hybrid vehicle method for recovering brake energy of ABS device |
| CN104924914B (en) * | 2015-06-15 | 2017-08-25 | 中通客车控股股份有限公司 | A kind of braking system of electric car and brake control method |
| CN106427965B (en) * | 2016-11-15 | 2019-10-15 | 青岛大学 | A kind of air-pressure brake control algolithm for Brake Energy feedback |
| CN108232241B (en) * | 2017-12-28 | 2020-11-03 | 潍柴动力股份有限公司 | Air compression system of fuel cell electric automobile and control method |
| CN110077376B (en) * | 2019-05-22 | 2022-02-22 | 山东理工大学 | Two-drive electric vehicle braking energy recovery gas circuit based on two-way one-way valve and linear exhaust electromagnetic valve |
-
2006
- 2006-10-08 CN CNB2006101135868A patent/CN100491153C/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102166962A (en) * | 2011-03-29 | 2011-08-31 | 重庆长安汽车股份有限公司 | Brake energy feedback control system of pure electric automobile |
| WO2012129891A2 (en) * | 2011-03-29 | 2012-10-04 | 重庆长安汽车股份有限公司 | Method and system for feedback control of braking energy in pure electric vehicle |
| WO2012129891A3 (en) * | 2011-03-29 | 2012-11-22 | 重庆长安汽车股份有限公司 | Method and system for braking energy feedback control in pure electric vehicle |
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| CN1923559A (en) | 2007-03-07 |
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