CN102874122B - Start and stop control method for extended range type electric motor car engine - Google Patents
Start and stop control method for extended range type electric motor car engine Download PDFInfo
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- CN102874122B CN102874122B CN201210414587.1A CN201210414587A CN102874122B CN 102874122 B CN102874122 B CN 102874122B CN 201210414587 A CN201210414587 A CN 201210414587A CN 102874122 B CN102874122 B CN 102874122B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
The invention relates to a start and stop control method for an extended range type electric motor car engine. The start and stop control method is characterized in that a power cell and a supercapacitor dual voltage platform are mounted on a new energy source extended range type electric motor coach, wherein a supercapacitor is used for storing braking energy, and the power cell and an APU (Auxiliary Power Unit) system of the engine provide driving energy; starting signals and wakeup signals of the engine are accessed into an electric wiring, and are sent to an ECU (Electronic Control Unit) by a VMS (Velocity-Measuring System); a supercapacitor management system CAN (Controller Area Network) bus and the VMS are in a same path, and a supercapacitor voltage value is acquired by the VMS in real time in a process of vehicle driving so as to judge recycled braking energy and monitor the braking energy stored in the vehicle-mounted supercapacitor in real time; and when voltage in the vehicle-mounted supercapacitor is larger than the voltage value in a normal shutdown state, the engine is in an idle shutdown state, and at the same time, the energy required for the vehicle driving is obtained from the braking energy stored in the supercapacitor, and a vehicle is driven by means of the energy of the vehicular supercapacitor.
Description
Technical field
The present invention relates to a kind of electric vehicle engine on off control method, particularly relate to a kind of extended-range electric vehicle driving engine on off control method.
Background technology
Facing to environmental pollution, deficient two hang-ups of oil resources, the energy-saving integral new-energy passenger of environmental protection is more and more subject to the attention of every country, environmental protection and energy-conservation be an important development direction of 21 century automotive technology.The Abgasgesetz of various countries is also increasingly strict simultaneously, and extended-range electric vehicle has the clean energy vehicle of new generation of low stain, low oil consumption feature just.
Extended-range electric vehicle is a kind of pure electrically operated electronlmobil being furnished with ground charging and vehicle-mounted function of supplying power.Its power system is made up of electrokinetic cell system, power-driven system, whole-control system and accessory power system (APU).Operation control policy is completed by entire car controller.Battery pack can be charged by ground charging pile or onboard charger, and driving engine can adopt fuel combustion type or gas type.Car load operational mode can work in electric-only mode as required, increase journey pattern or hybrid mode (HEV).When working in increasing journey pattern, fuel saving ratio increases infinite approach pure electric automobile with battery capacity, is the smooth transition vehicle of pure electric automobile.Because low speed torque is large, high-speed cruising is steady, and brake energy organic efficiency is high, and structure is simple and easy to maintenance, is a kind of pure electric coach being specially adapted to city bus.Extended-range electric vehicle is made up of chassis and car body, closed-centre system (comprising electrokinetic cell, super capacitor and supporting management system), main drive motor and controller, driving engine and generator system, entire car controller, operation display instrument and CAN, onboard charger or ground charging pile. in prior art; the braking energy that extended-range vehicle reclaims is stored in super capacitor; entire car controller, by the value to operating mode and super-capacitor voltage, judges whether idle stop.Under city bus operating mode, the engine idle time accounts for 30% ~ 50% of the whole state of cyclic operation time; And during engine idle, cause the waste of fuel.Idle stop is one of gordian technique of new-energy automobile fuel-economizing; idle stop control method kills engine when new-energy automobile can be made in stationary vehicle or slide; thus avoid the engine long time and operate in oil consumption and the higher idle speed zone of noxious gas emission, also can improve the efficiency that braking energy uses simultaneously.Current extended-range electric vehicle idle stop control method is: by the SOC value of battery (abbreviation of state of charge; refer to state-of-charge) judge; when SOC value of battery is between its efficiency area, extended-range electric vehicle driving engine is shut down, and enters pure electric driving mode.When SOC is lower, engine starting starts generating.
Prior art cannot make full use of the braking energy of recovery, and the too much consuming cells entering pure power mode can be too much using electrokinetic cell as the energy, and extended-range electric vehicle continual mileage is reduced.When APU starts again, need to charge to battery.Frequently to battery charging and discharging, the decay of battery can be accelerated again, shorten the life-span of battery.
Therefore be necessary defect existing in prior art is improved further, to reach higher energy-saving and emission-reduction requirement, harmful effect can not be caused to the electrokinetic cell of extended-range electric vehicle and continual mileage again simultaneously.
Summary of the invention
Technical matters to be solved by this invention is: energy when extended-range vehicle can not make full use of drag in the process of moving in prior art; And the frequent APU of use starts, and needs, to the frequent discharge and recharge of battery, to this considerably reduce the life-span of battery, makes the operating cost of vehicle increase; Also the continual mileage of battery-driven car can be made to decline, laying in the vehicle in equal maximum fuel situation, final exercised mileage reduces relatively simultaneously.
In order to solve problem existing in above-mentioned prior art, the invention provides a kind of extended-range electric vehicle driving engine on off control method:
New forms of energy extended-range electrobus is installed electrokinetic cell and super capacitor twin voltage platform, and super capacitor is used for storing braking energy, and electrokinetic cell and driving engine APU system provide driving-energy; Electric wiring accesses Engine Start Signal and wake-up signal, sends to ECU by entire car controller; Super capacitance management system CAN and entire car controller are on a road; among the process that vehicle is exercised; by entire car controller Real-time Collection super-capacitor voltage value; judge the braking energy reclaimed; braking energy stored in vehicle-mounted super capacitor is monitored in real time; when voltage among vehicle-mounted super capacitor is greater than the magnitude of voltage of orderly closedown; driving engine is idle stop; obtain in the braking energy that energy now needed for vehicle traveling all stores from super capacitor, automobile relies on the energy of vehicle-mounted super capacitor to travel.So both can reach the effect of energy-saving and emission-reduction, can not impact the electrokinetic cell of extended-range electric vehicle and continual mileage again.
Further; when the described voltage among vehicle-mounted super capacitor is greater than the magnitude of voltage of orderly closedown; driving engine just idle stop refers to; when super-capacitor voltage is greater than orderly closedown voltage; entire car controller judges that the electricity of current super capacitance stores can maintain the pure electrical travelling of vehicle and sail stretch journey, and driving engine directly stops working; If super-capacitor voltage does not reach orderly closedown voltage; then need to scheme according to the given super-capacitor voltage map of current vehicle speed; obtain current vehicle speed lower allow the magnitude of voltage of super capacitor of shutting down; then judge current super-capacitor voltage whether exceed current vehicle speed lower allow the magnitude of voltage of super capacitor of shutting down; if exceeded; then driving engine is shut down; the braking energy in super capacitor is used to provide vehicle to continue the energy travelling; if do not exceeded, then driving engine continues normal work.
Further; when the described voltage among vehicle-mounted super capacitor is greater than the magnitude of voltage of orderly closedown; driving engine just idle stop refers to; when voltage among vehicle-mounted super capacitor is greater than the magnitude of voltage of orderly closedown; driving engine just idle stop refers to; if super-capacitor voltage value is greater than 540V, have enough energy to maintain vehicle and travel stretch journey with pure power mode, now driving engine is shut down.If magnitude of voltage is less than 540V and do not have throttle signal, current vehicle speed is judged, according to the speed of a motor vehicle given super-capacitor voltage map value; If the speed of a motor vehicle reaches 80km/h, super-capacitor voltage only needs 420V just energy idle stop; If the speed of a motor vehicle reaches 50km/h, super-capacitor voltage value needs 460V driving engine just meeting idle stop; After driving engine is shut down, entire car controller, by gathering driver's pedal value, calculates motor demand power.If demand power is greater than 10kW and capacitance voltage value is less than 420V, driving engine starts again, provides motor driving power by APU and electrokinetic cell.
Further, when vehicle uses the braking energy in super capacitor to travel, because the energy in electric capacity can reduce gradually, use when energy reduces to super capacitor storing electricity, and when motor target requirement power is greater than 10kW, engine starting also normally works.
Further, as motor target requirement underproof 10kW, electrokinetic cell directly can be used to maintain vehicle and to travel.
Compared with prior art, the invention has the advantages that: utilize fully and reclaim braking energy, reduce the time that driving engine works between idle speed zone.Cannot generate electricity during engine idle and self be in non-economy interval, causing the waste of fuel.Shorten the engine idling condition time, can greatly improve extended-range electric vehicle oil-saving effect, reduce engine discharging amount.Key point of the present invention is: use super capacitor to reclaim braking energy, provide vehicular drive power.During this period, driving engine realizes idle stop, reaches the effect of energy-saving and emission-reduction, environmental protection.And retain a part of braking energy, make it meet driving engine and again start to the energy starting vehicle operating between generating.When vehicle be in slip car state time, the magnitude of voltage of being shut down by the given engine idle of the speed of a motor vehicle, thus realize slipping car idle stop function.
Accompanying drawing explanation
Fig. 1 is control policy diagram of circuit of the present invention
Detailed description of the invention
Below in conjunction with drawings and Examples the present invention done and describe further.
Accompanying drawing 1 is a control policy diagram of circuit of the present invention, can be found out by accompanying drawing, the present invention relates to a kind of extended-range electric vehicle driving engine on off control method:
New forms of energy extended-range electrobus is installed electrokinetic cell and super capacitor twin voltage platform, and super capacitor is used for storing braking energy, and electrokinetic cell and driving engine APU system provide driving-energy; Electric wiring accesses Engine Start Signal and wake-up signal, sends to ECU by entire car controller; Super capacitance management system CAN and entire car controller are on a road; among the process that vehicle is exercised; by entire car controller Real-time Collection super-capacitor voltage value; judge the braking energy reclaimed; braking energy stored in vehicle-mounted super capacitor is monitored in real time; when voltage among vehicle-mounted super capacitor is greater than the magnitude of voltage of orderly closedown; driving engine is idle stop; obtain in the braking energy that energy now needed for vehicle traveling all stores from super capacitor, automobile relies on the energy of vehicle-mounted super capacitor to travel.So both can reach the effect of energy-saving and emission-reduction, can not impact the electrokinetic cell of extended-range electric vehicle and continual mileage again.
Further; when the described voltage among vehicle-mounted super capacitor is greater than the magnitude of voltage of orderly closedown; driving engine just idle stop refers to; when super-capacitor voltage is greater than orderly closedown voltage; entire car controller judges that the electricity of current super capacitance stores can maintain the pure electrical travelling of vehicle and sail stretch journey, and driving engine directly stops working; If super-capacitor voltage does not reach orderly closedown voltage; then need to scheme according to the given super-capacitor voltage map of current vehicle speed; obtain current vehicle speed lower allow the magnitude of voltage of super capacitor of shutting down; then judge current super-capacitor voltage whether exceed current vehicle speed lower allow the magnitude of voltage of super capacitor of shutting down; if exceeded; then driving engine is shut down; the braking energy in super capacitor is used to provide vehicle to continue the energy travelling; if do not exceeded, then driving engine continues normal work.
Further; when the described voltage among vehicle-mounted super capacitor is greater than the magnitude of voltage of orderly closedown; driving engine just idle stop refers to; when voltage among vehicle-mounted super capacitor is greater than the magnitude of voltage of orderly closedown; driving engine just idle stop refers to; if super-capacitor voltage value is greater than 540V, have enough energy to maintain vehicle and travel stretch journey with pure power mode, now driving engine is shut down.If magnitude of voltage is less than 540V and do not have throttle signal, current vehicle speed is judged, according to the speed of a motor vehicle given super-capacitor voltage map value; If the speed of a motor vehicle reaches 80km/h, super-capacitor voltage only needs 420V just energy idle stop; If the speed of a motor vehicle reaches 50km/h, super-capacitor voltage value needs 460V driving engine just meeting idle stop; After driving engine is shut down, entire car controller, by gathering driver's pedal value, calculates motor demand power.If demand power is greater than 10kW and capacitance voltage value is less than 420V, driving engine starts again, provides motor driving power by APU and electrokinetic cell.
Further, when vehicle uses the braking energy in super capacitor to travel, because the energy in electric capacity can reduce gradually, use when energy reduces to super capacitor storing electricity, and when motor target requirement power is greater than 10kW, engine starting also normally works.
Further, as motor target requirement underproof 10kW, electrokinetic cell directly can be used to maintain vehicle and to travel.
Embodiment one
A kind of extended-range electric vehicle driving engine on off control method: among the process that vehicle is exercised; braking energy stored in vehicle-mounted super capacitor is monitored in real time; when voltage among vehicle-mounted super capacitor is greater than the magnitude of voltage of orderly closedown; driving engine quits work in control; obtain in the braking energy that energy now needed for vehicle traveling all stores from super capacitor, automobile can rely on energy wherein to travel a segment distance.
If when super-capacitor voltage is less than orderly closedown magnitude of voltage; first scheme according to the given super-capacitor voltage map of current vehicle speed; obtain current vehicle speed lower allow the magnitude of voltage of super capacitor of shutting down; then judge current super-capacitor voltage whether exceed current vehicle speed lower allow the magnitude of voltage of super capacitor of shutting down; if exceeded, then driving engine has been shut down, and uses the braking energy in super capacitor to provide vehicle to continue the energy travelling; if do not exceeded, then driving engine continues normal work.
When vehicle uses the braking energy in super capacitor to travel, because the energy in electric capacity can reduce gradually, when energy reduce to super capacitor storing electricity use and motor target requirement power is greater than 10kW time, engine starting normal work.
As motor target requirement underproof 10kW, electrokinetic cell directly can be used to maintain vehicle and to travel.
Below in conjunction with specific embodiment, the present invention will be further described:
1, on new forms of energy extended-range electrobus, install electrokinetic cell and super capacitor twin voltage platform, super capacitor is used for storing braking energy, and electrokinetic cell and driving engine APU system provide driving-energy.
2, vehicle needs to use electronic air-conditioning, inflation pump, servo-steering motor, and avoid when engine idle is shut down, these parts cannot work.
3, on electric wiring, access Engine Start Signal and wake-up signal, send to ECU by entire car controller.
4, super capacitance management system CAN want and entire car controller on a road, entire car controller can Real-time Collection super-capacitor voltage value.
5, super-capacitor voltage and car load operating mode are judged:
If super-capacitor voltage value is greater than 540V, have enough energy to maintain vehicle and travel stretch journey with pure power mode, now driving engine is shut down.If magnitude of voltage is less than 540V and do not have throttle signal, current vehicle speed is judged, according to the speed of a motor vehicle given super-capacitor voltage map value; If the speed of a motor vehicle reaches 80km/h, super-capacitor voltage only needs 420V just energy idle stop; If the speed of a motor vehicle reaches 50km/h, super-capacitor voltage value needs 460V driving engine just meeting idle stop.
6, after driving engine is shut down, entire car controller, by gathering driver's pedal value, calculates motor demand power.If demand power is greater than 10kW and capacitance voltage value is less than 420V, driving engine starts again, provides motor driving power by APU and electrokinetic cell.
Advantage of the present invention
1, by twin voltage platform, make braking energy be stored in super capacitor, at utmost can reclaim braking energy, do not need to consider that braking current is reclaimed in restriction, also can avoid occurring circulation between battery and electric capacity,
Improve the efficiency reclaiming braking energy.
2, entire car controller is by providing the instruction of engine idle shutdown to the judgement of capacitance voltage, can avoid directly using battery to drive; There is provided driving power by the braking energy reclaimed to motor, avoid the consumption of battery, actv. improves the driving that extended-range electric vehicle increases journey pattern.
Claims (2)
1. an extended-range electric vehicle driving engine on off control method, it is characterized in that, new forms of energy extended-range electrobus is installed electrokinetic cell and super capacitor twin voltage platform, and super capacitor is used for storing braking energy, and electrokinetic cell and driving engine APU system provide driving-energy; Electric wiring accesses Engine Start Signal and wake-up signal, sends to ECU by entire car controller; Super capacitance management system CAN and entire car controller are on a road, among the process that vehicle travels, by entire car controller Real-time Collection super-capacitor voltage value, judge the braking energy reclaimed, braking energy stored in vehicle-mounted super capacitor is monitored in real time, when voltage among vehicle-mounted super capacitor is greater than the magnitude of voltage of orderly closedown, driving engine is idle stop, obtain in the braking energy that energy now needed for vehicle traveling all stores from super capacitor, automobile relies on the energy of vehicle-mounted super capacitor to travel; When the described voltage among vehicle-mounted super capacitor is greater than the magnitude of voltage of orderly closedown, driving engine just idle stop refers to, when super-capacitor voltage is greater than 540V, entire car controller judges that the electricity of current super capacitance stores can maintain the pure electrical travelling of vehicle and sail stretch journey, and driving engine directly stops working; If super-capacitor voltage does not reach 540V voltage, and there is no throttle signal, then need to scheme according to the given super-capacitor voltage map of current vehicle speed, obtain current vehicle speed lower allow the magnitude of voltage of super capacitor of shutting down, if the speed of a motor vehicle reaches 80km/h, super-capacitor voltage only needs 420V just energy idle stop; If the speed of a motor vehicle reaches 50km/h, super-capacitor voltage value needs 460V driving engine just meeting idle stop; Driving engine uses the braking energy in super capacitor to provide vehicle to continue the energy travelling after shutting down; If do not exceeded, then driving engine continues normal work; After driving engine is shut down, entire car controller, by gathering driver's pedal value, calculates motor demand power; If demand power is greater than 10kW and capacitance voltage value is less than 420V, driving engine starts again, provides motor driving power by APU and electrokinetic cell; When vehicle uses the braking energy in super capacitor to travel, because the energy in electric capacity can reduce gradually, use when energy reduces to super capacitor storing electricity, and when motor target requirement power is greater than 10kW, engine starting also normally works.
2. a kind of extended-range electric vehicle driving engine on off control method as claimed in claim 1, is characterized in that, as motor target requirement underproof 10kW, directly uses electrokinetic cell to maintain vehicle and travels.
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| CN103465903B (en) * | 2013-09-23 | 2016-01-20 | 湖南南车时代电动汽车股份有限公司 | A kind of engine flameout control device of hybrid electric vehicle and method |
| CN103481785B (en) * | 2013-09-24 | 2016-05-11 | 湖南南车时代电动汽车股份有限公司 | Extended-range dynamical system and two voltage protection method thereof |
| CN104129313B (en) * | 2014-06-11 | 2016-08-24 | 湖南南车时代电动汽车股份有限公司 | A kind of determination method of super capacitor energy-storage system architecture in super capacity car |
| CN104691358B (en) * | 2015-02-16 | 2017-09-15 | 北京新能源汽车股份有限公司 | The energy recovery control method and device of stroke-increasing electric automobile |
| CN107628012A (en) * | 2017-10-23 | 2018-01-26 | 中车兰州机车有限公司 | Air damper and rail vehicle |
| CN108199431B (en) * | 2017-12-29 | 2022-02-22 | 河南嘉晨智能控制股份有限公司 | Electric equipment and quick soft start control method thereof |
| CN113879142A (en) * | 2021-09-13 | 2022-01-04 | 合众新能源汽车有限公司 | Intelligent emergency starting system and method for range-extended electric automobile |
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| US6262896B1 (en) * | 2000-06-19 | 2001-07-17 | General Motors Corporation | Auxiliary power conversion for an electric vehicle using high frequency injection into a PWM inverter |
| CN202038185U (en) * | 2011-03-31 | 2011-11-16 | 北京汽车新能源汽车有限公司 | Braking energy recycling control system based on automatic transmission (AT) for pure electric vehicle |
| CN102505995B (en) * | 2011-11-01 | 2015-08-05 | 湖南南车时代电动汽车股份有限公司 | The controlling method of hybrid electric vehicle engine auto idle speed start and stop and system and device |
| CN102501778A (en) * | 2012-01-06 | 2012-06-20 | 湖南南车时代电动汽车股份有限公司 | Extended-range electric vehicle energy distribution method based on dual-voltage composite energy storage system |
| CN102700419B (en) * | 2012-06-06 | 2014-06-04 | 北京汽车新能源汽车有限公司 | Parallel-type braking energy recovery system and control method thereof |
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