CN102874122A - 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 PDF

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Publication number
CN102874122A
CN102874122A CN2012104145871A CN201210414587A CN102874122A CN 102874122 A CN102874122 A CN 102874122A CN 2012104145871 A CN2012104145871 A CN 2012104145871A CN 201210414587 A CN201210414587 A CN 201210414587A CN 102874122 A CN102874122 A CN 102874122A
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China
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voltage
super capacitor
vehicle
energy
engine
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CN2012104145871A
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CN102874122B (en
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李晟
裴海灵
谢勇波
王文明
宋超
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Changsha CRRC Zhiyu New Energy Technology Co., Ltd
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Hunan CSR Times Electric Vehicle Co Ltd
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00Road transport of goods or passengers
    • Y02T10/80Technologies aiming to reduce greenhouse gasses emissions common to all road transportation technologies
    • Y02T10/92Energy efficient charging or discharging systems for batteries, ultracapacitors, supercapacitors or double-layer capacitors specially adapted for vehicles

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

A kind of extended-range electric vehicle driving engine on off control method
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 deficient two hang-ups of environmental pollution, oil resources, the energy-saving integral new-energy passenger of environmental protection more and more is 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 low clean energy vehicle of new generation that pollutes, hangs down the oil consumption characteristics just.
Extended-range electric vehicle is a kind of pure electrically operated electronlmobil of being furnished with ground charging and vehicle-mounted function of supplying power.Its power system is comprised of electrokinetic cell system, power-driven system, whole-control system and accessory power system (APU).Finish the operation control policy by entire car controller.Battery pack can be by ground charging pile or onboard charger charging, and driving engine can adopt fuel combustion type or gas type.The car load operational mode can work in as required electric-only mode, increase journey pattern or hybrid mode (HEV).When working in when increasing the journey pattern, fuel saving ratio increases the 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 the brake energy organic efficiency is high, and easy-maintaining simple in structure is a kind of pure electric coach that is specially adapted to city bus.Extended-range electric vehicle is comprised 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 bus, onboard charger or ground charging pile. in the prior art; the braking energy that the extended-range vehicle reclaims is stored in the super capacitor; entire car controller judges whether idle stop by the value to operating mode and super capacitor voltage.Under the city bus operating mode, the engine idle time accounts for 30% ~ 50% of the whole state of cyclic operation time; And during engine idle, caused the waste of fuel.Idle stop is one of gordian technique of new-energy automobile fuel-economizing; the idle stop control method can make new-energy automobile in stationary vehicle or kill engine when sliding; thereby avoided the engine long time to operate in oil consumption and the higher idle speed zone of noxious gas emission, also can improve the efficient that braking energy uses simultaneously.Extended-range electric vehicle idle stop control method is at present: by the SOC value of battery (abbreviation of state of charge; refer to state-of-charge) judge; when SOC value of battery was between its efficiency area, the extended-range electric vehicle engine shutdown entered pure electric driving mode.When SOC was low, engine starting began generating.
Prior art can't take full advantage of the braking energy of recovery, and too much enter pure power mode with electrokinetic cell as the energy can be too much consuming cells so that the extended-range electric vehicle continual mileage reduces.When APU starts again, need to charge to battery.To battery charging and discharging, can accelerate again the decay of battery frequently, shorten the life-span of battery.
Therefore be necessary to improve further for existing defective in the prior art, to reach higher energy-saving and emission-reduction requirement, can not cause harmful effect to electrokinetic cell and the continual mileage of extended-range electric vehicle again simultaneously.
 
Summary of the invention
Technical matters to be solved by this invention is: the energy when the extended-range vehicle can not take full advantage of drag in the process of moving in the prior art; And frequently use APU to start, need to frequently discharge and recharge battery, this has greatly reduced the life-span of battery, so that the operating cost of vehicle rises; Simultaneously also can be so that the continual mileage of battery-driven car descend, in the vehicle under having laid in equal maximum fuel situation, final mileage of exercising reduces relatively.
In order to solve existing problem in the above-mentioned prior art, the invention provides a kind of extended-range electric vehicle driving engine on off control method:
At new forms of energy extended-range electrobus electrokinetic cell and the two voltage platforms of super capacitor are installed, super capacitor is used for storing braking energy, and electrokinetic cell and driving engine APU system provide driving-energy; At electric wiring access Engine Start Signal and wake-up signal, send to ECU by entire car controller; Super capacitance management system CAN bus and entire car controller are one the tunnel; among the process that vehicle is exercised; by entire car controller Real-time Collection super capacitor magnitude of voltage; judge the braking energy that reclaims; braking energy stored in the vehicle-mounted super capacitor is carried out Real Time Monitoring; when the voltage among the vehicle-mounted super capacitor during greater than the magnitude of voltage of orderly closedown; driving engine is idle stop; obtain in the braking energy that the required energy of Vehicle Driving Cycle this moment 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 electrokinetic cell and the continual mileage of extended-range electric vehicle do not impacted again.
Further, described voltage among vehicle-mounted super capacitor is during greater than the magnitude of voltage of orderly closedown, driving engine just idle stop refers to, when super capacitor voltage during greater than orderly closedown voltage, entire car controller judges that the electric weight of current super capacitor storage can keep the pure electricity of the vehicle stretch journey of travelling, and driving engine is directly flame-out; If super capacitor voltage does not reach orderly closedown voltage; then need to scheme according to the given super capacitor voltage of current vehicle speed map; obtain the lower magnitude of voltage that allows the super capacitor of shutdown of current vehicle speed; then judge whether current super capacitor voltage surpasses the lower magnitude of voltage that allows the super capacitor of shutdown of current vehicle speed; if surpassed; engine shutdown then; the energy that provides vehicle to continue to travel down with the braking energy in the super capacitor; if do not surpass, then driving engine continues normal operation.
Further; described voltage among vehicle-mounted super capacitor is during greater than the magnitude of voltage of orderly closedown; driving engine just idle stop refers to; when the voltage among the vehicle-mounted super capacitor during greater than the magnitude of voltage of orderly closedown; driving engine just idle stop refers to; if the super capacitor magnitude of voltage greater than 540V, has enough energy to keep vehicle with the pure power mode stretch journey of travelling, this moment engine shutdown.If magnitude of voltage is less than 540V and do not have throttle signal, current vehicle speed is judged, according to the given super capacitor voltage of speed of a motor vehicle map value; If the speed of a motor vehicle reaches 80km/h, super capacitor voltage only needs just energy idle stop of 420V; If the speed of a motor vehicle reaches 50km/h, the super capacitor magnitude of voltage needs the 460V driving engine just to understand idle stop; Behind the engine shutdown, entire car controller calculates the motor demand power by gathering driver's pedal value.If less than 420V, driving engine starts demand power again, provides motor-driven power by APU and electrokinetic cell greater than 10kW and capacitance voltage value.
Further, when vehicle uses braking energy in the super capacitor to travel, because the energy in the electric capacity can reduce gradually, use when energy reduces to the super capacitor storing electricity, and motor target requirement power is during greater than 10kW engine starting and normal operation.
Further, when motor target requirement underproof 10kW, can directly use electrokinetic cell to keep Vehicle Driving Cycle.
Compared with prior art, the invention has the advantages that: utilize fully and reclaim braking energy, reduce the time that driving engine is worked between idle speed zone.Can't generate electricity during engine idle and self be in the non-economy interval, cause the waste of fuel.Shorten the engine idling condition time, can greatly improve the extended-range electric vehicle oil-saving effect, reduce the engine emission amount.Key point of the present invention is: use super capacitor to reclaim braking energy, vehicular drive power is provided.During this period, driving engine is realized idle stop, reaches the effect of energy-saving and emission-reduction, environmental protection.And keep a part of braking energy, make its satisfy driving engine again start to begin to generate electricity between the energy of vehicle operating.When vehicle is in slide car state, by the magnitude of voltage of the given engine idle shutdown of the speed of a motor vehicle, thereby realize slipping car idle stop function.
Description of drawings
Fig. 1 is control policy diagram of circuit of the present invention
The specific embodiment
Below in conjunction with drawings and Examples the present invention is done further description.
Accompanying drawing 1 is a control policy diagram of circuit of the present invention, can find out by accompanying drawing, the present invention relates to a kind of extended-range electric vehicle driving engine on off control method:
At new forms of energy extended-range electrobus electrokinetic cell and the two voltage platforms of super capacitor are installed, super capacitor is used for storing braking energy, and electrokinetic cell and driving engine APU system provide driving-energy; At electric wiring access Engine Start Signal and wake-up signal, send to ECU by entire car controller; Super capacitance management system CAN bus and entire car controller are one the tunnel; among the process that vehicle is exercised; by entire car controller Real-time Collection super capacitor magnitude of voltage; judge the braking energy that reclaims; braking energy stored in the vehicle-mounted super capacitor is carried out Real Time Monitoring; when the voltage among the vehicle-mounted super capacitor during greater than the magnitude of voltage of orderly closedown; driving engine is idle stop; obtain in the braking energy that the required energy of Vehicle Driving Cycle this moment 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 electrokinetic cell and the continual mileage of extended-range electric vehicle do not impacted again.
Further, described voltage among vehicle-mounted super capacitor is during greater than the magnitude of voltage of orderly closedown, driving engine just idle stop refers to, when super capacitor voltage during greater than orderly closedown voltage, entire car controller judges that the electric weight of current super capacitor storage can keep the pure electricity of the vehicle stretch journey of travelling, and driving engine is directly flame-out; If super capacitor voltage does not reach orderly closedown voltage; then need to scheme according to the given super capacitor voltage of current vehicle speed map; obtain the lower magnitude of voltage that allows the super capacitor of shutdown of current vehicle speed; then judge whether current super capacitor voltage surpasses the lower magnitude of voltage that allows the super capacitor of shutdown of current vehicle speed; if surpassed; engine shutdown then; the energy that provides vehicle to continue to travel down with the braking energy in the super capacitor; if do not surpass, then driving engine continues normal operation.
Further; described voltage among vehicle-mounted super capacitor is during greater than the magnitude of voltage of orderly closedown; driving engine just idle stop refers to; when the voltage among the vehicle-mounted super capacitor during greater than the magnitude of voltage of orderly closedown; driving engine just idle stop refers to; if the super capacitor magnitude of voltage greater than 540V, has enough energy to keep vehicle with the pure power mode stretch journey of travelling, this moment engine shutdown.If magnitude of voltage is less than 540V and do not have throttle signal, current vehicle speed is judged, according to the given super capacitor voltage of speed of a motor vehicle map value; If the speed of a motor vehicle reaches 80km/h, super capacitor voltage only needs just energy idle stop of 420V; If the speed of a motor vehicle reaches 50km/h, the super capacitor magnitude of voltage needs the 460V driving engine just to understand idle stop; Behind the engine shutdown, entire car controller calculates the motor demand power by gathering driver's pedal value.If less than 420V, driving engine starts demand power again, provides motor-driven power by APU and electrokinetic cell greater than 10kW and capacitance voltage value.
Further, when vehicle uses braking energy in the super capacitor to travel, because the energy in the electric capacity can reduce gradually, use when energy reduces to the super capacitor storing electricity, and motor target requirement power is during greater than 10kW engine starting and normal operation.
Further, when motor target requirement underproof 10kW, can directly use electrokinetic cell to keep Vehicle Driving Cycle.
Embodiment one
A kind of extended-range electric vehicle driving engine on off control method: among the process that vehicle is exercised; carry out Real Time Monitoring for braking energy stored in the vehicle-mounted super capacitor; when the voltage among the vehicle-mounted super capacitor during greater than the magnitude of voltage of orderly closedown; driving engine quits work in control; obtain in the braking energy that this moment, Vehicle Driving Cycle required energy all stored from super capacitor, automobile can rely on wherein the energy segment distance that travels.
If super capacitor voltage is during less than the orderly closedown magnitude of voltage; scheme according to the given super capacitor voltage of current vehicle speed map first; obtain the lower magnitude of voltage that allows the super capacitor of shutdown of current vehicle speed; then judge whether current super capacitor voltage surpasses the lower magnitude of voltage that allows the super capacitor of shutdown of current vehicle speed; if surpassed, engine shutdown then, the energy that provides vehicle to continue to travel down with the braking energy in the super capacitor; if do not surpass, then driving engine continues normal operation.
When vehicle uses braking energy in the super capacitor to travel, because the energy in the electric capacity can reduce gradually, when energy reduces to that the super capacitor storing electricity uses and motor target requirement power during greater than 10kW, engine starting and normal operation.
When motor target requirement underproof 10kW, can directly use electrokinetic cell to keep Vehicle Driving Cycle.
The present invention will be further described below in conjunction with specific embodiment:
1, at new forms of energy extended-range electrobus electrokinetic cell and the two voltage platforms of super capacitor are installed, super capacitor is used for storing braking energy, and electrokinetic cell and driving engine APU system provide driving-energy.
2, vehicle need to use electronic air-conditioning, inflation pump, servo-steering motor, avoids when engine idle is shut down, and these parts can't be worked.
3, at electric wiring access Engine Start Signal and wake-up signal, send to ECU by entire car controller.
4, super capacitance management system CAN bus want and entire car controller one the tunnel, entire car controller can Real-time Collection super capacitor magnitude of voltage.
5, super capacitor voltage and car load operating mode are judged:
If the super capacitor magnitude of voltage greater than 540V, has enough energy to keep vehicle with the pure power mode stretch journey of travelling, this moment engine shutdown.If magnitude of voltage is less than 540V and do not have throttle signal, current vehicle speed is judged, according to the given super capacitor voltage of speed of a motor vehicle map value; If the speed of a motor vehicle reaches 80km/h, super capacitor voltage only needs just energy idle stop of 420V; If the speed of a motor vehicle reaches 50km/h, the super capacitor magnitude of voltage needs the 460V driving engine just to understand idle stop.
6, behind the engine shutdown, entire car controller calculates the motor demand power by gathering driver's pedal value.If less than 420V, driving engine starts demand power again, provides motor-driven power by APU and electrokinetic cell greater than 10kW and capacitance voltage value.
Advantage of the present invention
1, by two voltage platforms, braking energy is stored in the super capacitor, can at utmost reclaims braking energy, do not need to consider restriction recovery braking current, also can avoid circulation occurring between battery and the electric capacity,
Improve the efficient that reclaims braking energy.
2, entire car controller provides the instruction that engine idle is shut down by the judgement to capacitance voltage, can avoid directly using battery to drive; Provide driving power by the braking energy that reclaims to motor, avoided the consumption of battery, actv. improves the driving that extended-range electric vehicle increases the journey pattern.

Claims (5)

1. extended-range electric vehicle driving engine on off control method, it is characterized in that, at new forms of energy extended-range electrobus electrokinetic cell and the two voltage platforms of super capacitor are installed, super capacitor is used for storing braking energy, and electrokinetic cell and driving engine APU system provide driving-energy; At electric wiring access Engine Start Signal and wake-up signal, send to ECU by entire car controller; Super capacitance management system CAN bus and entire car controller are one the tunnel; among the process that vehicle is exercised; by entire car controller Real-time Collection super capacitor magnitude of voltage; judge the braking energy that reclaims; braking energy stored in the vehicle-mounted super capacitor is carried out Real Time Monitoring; when the voltage among the vehicle-mounted super capacitor during greater than the magnitude of voltage of orderly closedown; driving engine is idle stop; obtain in the braking energy that the required energy of Vehicle Driving Cycle this moment all stores from super capacitor, automobile relies on the energy of vehicle-mounted super capacitor to travel.
2. a kind of extended-range electric vehicle driving engine on off control method as claimed in claim 1, it is characterized in that, described voltage among vehicle-mounted super capacitor is during greater than the magnitude of voltage of orderly closedown, driving engine just idle stop refers to, when super capacitor voltage during greater than orderly closedown voltage, entire car controller judges that the electric weight of current super capacitor storage can keep the pure electricity of the vehicle stretch journey of travelling, and driving engine is directly flame-out; If super capacitor voltage does not reach orderly closedown voltage; then need to scheme according to the given super capacitor voltage of current vehicle speed map; obtain the lower magnitude of voltage that allows the super capacitor of shutdown of current vehicle speed; then judge whether current super capacitor voltage surpasses the lower magnitude of voltage that allows the super capacitor of shutdown of current vehicle speed; if surpassed; engine shutdown then; the energy that provides vehicle to continue to travel down with the braking energy in the super capacitor; if do not surpass, then driving engine continues normal operation.
3. a kind of extended-range electric vehicle driving engine on off control method as claimed in claim 1 or 2, it is characterized in that, described voltage among vehicle-mounted super capacitor is during greater than the magnitude of voltage of orderly closedown, driving engine just idle stop refers to, when the voltage among the vehicle-mounted super capacitor during greater than the magnitude of voltage of orderly closedown, driving engine just idle stop refers to, if the super capacitor magnitude of voltage is greater than 540V, have enough energy to keep vehicle with the pure power mode stretch journey of travelling, this moment engine shutdown;
If magnitude of voltage is less than 540V and do not have throttle signal, current vehicle speed is judged, according to the given super capacitor voltage of speed of a motor vehicle map value; If the speed of a motor vehicle reaches 80km/h, super capacitor voltage only needs just energy idle stop of 420V; If the speed of a motor vehicle reaches 50km/h, the super capacitor magnitude of voltage needs the 460V driving engine just to understand idle stop; Behind the engine shutdown, entire car controller calculates the motor demand power by gathering driver's pedal value;
If less than 420V, driving engine starts demand power again, provides motor-driven power by APU and electrokinetic cell greater than 10kW and capacitance voltage value.
4. a kind of extended-range electric vehicle driving engine on off control method as claimed in claim 1 or 2, it is characterized in that, when the braking energy in the vehicle use super capacitor travels, because the energy in the electric capacity can reduce gradually, when reducing to the super capacitor storing electricity, energy uses, and motor target requirement power is during greater than 10kW, engine starting and normal operation.
5. a kind of extended-range electric vehicle driving engine on off control method as claimed in claim 1 or 2 is characterized in that, when motor target requirement underproof 10kW, can directly use electrokinetic cell to keep Vehicle Driving Cycle.
CN201210414587.1A 2012-10-26 2012-10-26 Start and stop control method for extended range type electric motor car engine Active CN102874122B (en)

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CN104129313A (en) * 2014-06-11 2014-11-05 湖南南车时代电动汽车股份有限公司 Method for determining structures of super-capacitor energy storage systems in super-capacitor automobile
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CN108199431A (en) * 2017-12-29 2018-06-22 郑州嘉晨电器有限公司 Electrical equipment and its Quick soft-start control method

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CN108199431A (en) * 2017-12-29 2018-06-22 郑州嘉晨电器有限公司 Electrical equipment and its Quick soft-start control method

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Inventor after: Guo Shuying

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Inventor after: Wang Wenming

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