CN106285972A - The method of the electromotor automatic start-stop of vehicle - Google Patents
The method of the electromotor automatic start-stop of vehicle Download PDFInfo
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- CN106285972A CN106285972A CN201510280752.2A CN201510280752A CN106285972A CN 106285972 A CN106285972 A CN 106285972A CN 201510280752 A CN201510280752 A CN 201510280752A CN 106285972 A CN106285972 A CN 106285972A
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Abstract
The electronic control module framework of the car load of automatic start-stop at double clutch gearboxes is applied with car body control module BCM for information control center; can choose whether to enter automatic start-stop pattern by automatic start-stop mode of operation select button; after selecting automatic start-stop mode of operation; the battery status monitored according to smart battery system; driving triggers automatic engine stop by brake pedal and automatically starts; thus reduce car load and drive intermediate fuel oil consumption at city idling operation, reduce the purpose of combustion gases exhaust.
Description
Technical field
The present invention relates to the method for the electromotor automatic start-stop of a kind of vehicle and perform the electronic control system of the method.
Background technology
Along with China passenger car market is after 2009 break through 10,000,000, the sales volume of passenger car increases in later 4 years year by year, key city traffic simultaneously is more crowded, the impact of urban environment is the most progressively discussed warmly by its exhaust emissions, although it is the most disputable on the concrete ratio of the impact of overall atmospheric pollution on current metropolitan fine particles and exhaust pollution, but undeniable is that a large amount of of downtown area passenger car use the air pollution to inner city can not be ignored, domestic major metropolitan also releases one after another and limits the policy of number plate, to reducing urban traffic congestion and reducing exhaust emissions, reduce the air pollution of passenger car.Under the operating mode of city, traffic lights and the reason of traffic congestion, idling waits that operating mode is more, and the fuel consumption of low speed and idling operation is much higher compared with high speed operating mode.
Summary of the invention
The problem of exhaust emissions under low speed and idling operation is carried in order to solve vehicle, the present invention proposes to work the engine stop under these operating modes, it is the power supply that on car load, the short time is done in middle Smaller load electricity consumption load by accumulator, it is accumulator charging in the high speed operating mode that engine operating efficiency is high, then can save part fuel oil, decrease exhaust emissions amount simultaneously.When electromotor is operated in middle high load capacity, by monitoring the battery capacity of accumulator, the temperature of accumulator, the voltage of accumulator and the aging performance of accumulator, the different charge mode of regulation and voltage so that accumulator can complete charging by the fastest in the way of beneficially service life.
Control according to the present invention has the method for the vehicle motor automatic start-stop of automatic gear-box; signal including the position detecting the speed about vehicle and brake pedal; wherein; when the position of brake pedal drops to more than the first precalculated position; and when speed is less than predetermined threshold under the effect of brake, controls electromotor and enter the duty of autostop；The speed risen when the position of brake pedal rises to the second precalculated position or on the position of brake pedal exceedes predetermined threshold value, controls electromotor and restarts.In engine speed 1200 rpms, speed below 20 kilometer per hours, the position of brake pedal drops to and exceedes predetermined value simultaneously, controls electromotor and enters autostop state.Described first precalculated position is less than described second precalculated position.
Control according to the present invention has the method for the vehicle motor automatic start-stop of manual transmission; signal including the position detecting the speed about vehicle and clutch pedal; wherein; predetermined value is exceeded when the position of clutch pedal drops to; the gear of change speed gear box is in neutral position state; and when speed is less than predetermined threshold under the effect of brake, controls electromotor and enter the duty of autostop；When let slip the clutch again and when reaching precalculated position, control electromotor and restart.When gear being detected not at neutral gear, it is impossible to trigger automatic start-stop and control function.
According to the preferential embodiment of the present invention, the status information of detection accumulator；And the power request that detection car load equipment sends, when electromotor enters autostop state, controlling this accumulator provides the equipment of car load to power；If accumulator cannot meet the power request that car load equipment sends, then control electromotor and restart.The status information of detection accumulator includes the electric current that detects real-time accumulator, the terminal voltage of accumulator, the temperature of accumulator, current charge volume, the startup function of accumulator, service life aging of accumulator.
Automatic start-stop controls function to be triggered by the mode selecting button on control panel; and control functional indicator light instruction automatic start-stop by automatic start-stop and control the state of function; when entering automatic start-stop control model; mode selecting button flashes, and the pointer of engine speed indicator indicates in the autostop graduation indication position of non-zero rotating speed.
When electromotor restarts from autostop state, control electronic throttle and quickly open, and control to provide for the electronic pump of gear box oil accumulation of energy the gear box oil of high pressure.When relatively low engine speed, lingeringly control that the tandem of vehicle starts the rotating coil of motor and meshing gear stretches out coil.
According to the preferential embodiment of the present invention, including detection electromotor front hatch cover state position information, wherein when engine compartment cover is in open mode, stop the function of electromotor automatic start-stop.Also include detecting driver side door position signal, driver side seat belt inserts signal, wherein when judging that driver leaves steering position, stops the function of electromotor automatic start-stop.Also include the position recording the bidirectional cam axle of electromotor.
According to a further aspect in the invention, it is provided that the electronic control system of a kind of vehicle, the method performing above-mentioned electromotor automatic start-stop.
Accompanying drawing explanation
Fig. 1 shows the schematic diagram of the method for the vehicle motor automatic start-stop with manual transmission；
Fig. 2 applies to the schematic diagram of the method for the automatic start-stop of double clutch automatic speed changing case configuration air intake duct multi point injection engine.
Detailed description of the invention
Fig. 1 is shown in by the primary structure of the automatic start-stop control system of configuration manual transmission shelves.When detect car load be in work under automatic start-stop control model time, trigger, by the state of clutch, entrance that automatic start-stop controls and exit, autostop and when automatically starting the control gear of change speed gear box at neutral gear；The main modular of the double clutch gearbox automatic start-stop control system of configuration has: car body control module, intelligent battery monitoring system, tandem motor assembly, 12V accumulator, controlled direct-current generator, engine control module, instrument face plate shows, airconditioning control module, Transmission Control Module etc., control between module and write to each other and see Fig. 2, it enters and exit automatic start-stop control model in driving is to be controlled by brake pedal, when autostop and automatically startup, the control gear of change speed gear box is driving gear one grade, it is thus desirable to momentum on effective rotating speed when controlling engine start, to reduce shake when starting, there is the reliability that on enough electromotors, momentum starts with guarantee simultaneously.
As in figure 2 it is shown, this automatic start-stop control system designs on the basis of manual transmission automatic start-stop control system (Fig. 1).Electromotor automatic start-stop controls function and refers to that car load is in the case of firing key is not turned off, but the when of need not work with electromotor, such as traffic lights, the when that traffic congestion or temporary parking waiting, it is automatically stopped electromotor work, and can automatically start electromotor when driver wishes again to start to walk when, to reduce oil consumption, reduce the purpose of discharge.This control system is using vehicle body electronic control module (BCM) as control centre, CAN and LIN bus are as car load communication channel simultaneously, car load dynamical system is equipped with traditional air intake duct multi-point injection engine with supercharger and double clutch gearbox, it is achieved that being automatically stopped electromotor work and automatically starting electromotor work in car load driving procedure.Battery status during by monitoring the state of current accumulator and predicting engine start next time, determines whether accumulator has enough energy to support electromotor entrance automatic start-stop pattern.Maximum difference when this system works with the automatic start-stop control system of band manual transmission is during automatic start-stop, double clutch gearbox automatic start-stop control systems gear when automatically starting is a grade of drive, and manual transmission automatic start-stop control system is neutral.
Being integrated with the functional mode select button that automatic start-stop controls in panel assembly (IPC), select button display lamp goes out by default, and acquiescence selects the functional mode of automatic start-stop；After client presses the button, display lamp is bright, and this signal sends to bus by vehicle body electronic control module (BCM), and closes the functional mode of automatic start-stop.
During engine start, system default is automatic start-stop pattern, after engine start reaches heat engine state, when energy that engine start is consumed is less, i.e. can enter automatically actuated operating mode, for ensureing the service life of accumulator, have employed controllable DC motor is accumulator charging；The entry condition of automatic start-stop is set for improving fuel economy, in autostop pattern, by monitoring battery discharging state and the demand of power load, rationally triggers electromotor entrance and start work.
When the display of automatic start-stop control system functional indicator light is extinguished, automatic start-stop control functional mode works; this function can be closed by the mode selecting button on control panel; now automatic start-stop control system functional indicator light shows and lights; and it is shown in green; it is yellow when enter autostop stage display lamp changing color; and flash according to certain frequency, the pointer instruction of engine speed indicator autostop graduation indication position between 1000 rpms of scales and 0 rpm of two scale simultaneously.
For not having automatic start-stop to control the car load of function under the effect of brake system, speed is gradually decrease to zero, electromotor enters hot idle speed control, wait that electromotor controls input information, during idling by load less time by electromotor be car load electrical equipment provide power supply, when load is bigger during electromotor deficiency accumulator participate in provide electric energy, but electromotor still operating, fuel consumption, and produce waste gas.
Except for the difference that; equipped with automatically starting the car load controlling function after the pattern selecting automatic start-stop; car load with manual transmission reaches certain depth at clutch; change speed gear box is completely disengaged with engaging of electromotor; the gear of change speed gear box is in neutral position state; when speed slides into less than certain threshold value under the effect of brake, enter the duty of autostop；When again stepping on clutch and reaching certain threshold value, automatically starting electromotor work, during autostop, accumulator provides power supply for car load electrical equipment, and electromotor is in idle state.If be detected that gear information is not when neutral gear, then can not enter automatic start-stop and control function.
For automatic gear-box system, according to the degree of depth and the GES of the brake pedal of operator, when the depth that speed drops below a certain threshold value accelerator pedal simultaneously exceedes certain value, electromotor enters autostop state.In order to more save energy, can be in 1200 rpms of electromotor and car load speed below 20 kilometer per hours, after the depth of brake pedal exceedes demarcation threshold value simultaneously, electromotor can quit work entrance autostop state.The equipment of car load now is powered and is provided by accumulator, if needing the high-power electric appliance work such as compressor of air conditioner, the power request that the state of the accumulator that car body control module BCM sends according to Intelligent battery management system IBS and compressor of air conditioner control module ECC send, judge whether battery condition can maintain compressor of air conditioner continuous firing, if can not, then ask engine start, energy of air condition compressor is directly provided by electromotor, if accumulator is able to maintain that its work, the most do not start electromotor.When the position of brake pedal rises to a certain threshold value, electromotor restarts entrance work.
For ensureing the rapidity started, in each sample cyclic, if it find that the speed risen on the position of brake pedal exceedes the threshold value of demarcation, the most quickly start electromotor；During autostop, the pointer of engine speed indicator is parked in the special graduation position of non-zero rotating speed, flashes the instruction of automatic start-stop control knob simultaneously.For ensureing the rapidity and the stability that are again started up, control the electronic air throttle body after oil-break and quickly open so that air inlet quickly increases, ensure that driver's electromotor when operating mode of changing mind at any time is driven quickly responds, gearbox shifting when being specifically designed to the electronic pump of gear box oil accumulation of energy for being again started up provides the gear box oil of high pressure, the shake that during to overcome electromotor just to start, change speed gear box oil pressure deficiency causes.
For the vehicle being on ramp, electric brake control module EBCM is delivered to grade signal in bus, when ECM receives grade signal and starts electromotor in the case of the gradient is more than certain number of degrees, the brake of one to two seconds is remained in that, it is ensured that the promptness of the automatic start operating performance power output on sloped of upstroke after brake pedal discharges completely.It is respectively adopted different brake pedal threshold values pacifically in the gradient controls the entrance of function and exit to control electromotor automatic start-stop to reach more preferable driving, use brake pedal threshold ones to enter and high threshold exits to increase the stability and the instantaneity of response started.
With reference to accompanying drawing 1 and accompanying drawing 2, in automatic start-stop control system, the access times substantial increase of accumulator, on the basis of original accumulator battery, add intelligent battery control module IBS for monitoring battery condition, it transmits the electric current of real-time accumulator by LIN bus to BCM, the terminal voltage of accumulator, the temperature of accumulator, current charge volume SOC(state of charge), the startup function SOF(state of function of accumulator), the aging SOH(state of health in the service life of accumulator) etc. the information of six aspects.
The Capacity Management algorithm of accumulator is stored in BCM, optimizes the voltage levvl of accumulator and current charge volume by charging voltage, it is ensured that the infringement in the life-span of accumulator is preferably minimized by charging process.BCM sends the information to ECM by high-speed CAN bus; in ECM, the information of the management logic dependence accumulator of the automatic start-stop function of design is carried out entry deterrence autostop pattern or enables the request automatically starting electromotor, and the priority of these information is less than the request automatically starting electromotor less than safety-related condition；After engine control module ECM receives, by CAN, the percentage command that the next optimization charging voltage of BCM transmission changes into, required the pulse-width signal control end to controlled direct-current generator of percentage ratio according to certain rate-adaptive pacemaker by input/output port discrete for ECM, the field current information of electromotor is fed back to the port of ECM by the feedback end of controlled direct-current generator simultaneously, ensure the service life of accumulator, reach more preferable fuel economy.
In order to prevent electromotor front hatch cover open keep in repair time electromotor automatically start cause the person injury, front hatch cover location status positional information need to be connected to ECM, when engine compartment cover is in open mode, should stop the function of automatic start-stop, this location status is also connected to BCM for indicating front hatch cover positional information simultaneously.
When driver side door position signal car door opening being detected; when the signals security band of driver side seat belt insertion simultaneously is not inserted into exceeding certain time; judge that driver leaves steering position; stop automatic start-stop and control function; if electromotor is in running status, autostop state can not being entered, if being now in autostop position, being then automatically stopped electromotor; and show yellow indicator lamp, until engine key is closed or key starts again.
Also by the turned position using bidirectional cam shaft position sensor to record electromotor; can rock back and forth close to electromotor usual time totally stationary at electromotor stopping process; synchronizing information is recorded; can wait that startup hypodontia signal that crankshaft-position signal takes turns is to carry out location determination; start and light a fire the startup time that can shorten in an ensuing engine restarting; simultaneously it can be avoided that electromotor occurs oil spout and the igniting of electromotor when negative rotating speed; produce the highest electromotor reversing rotating speed, damage electromotor.
With reference to accompanying drawing 2, after engine start, default conditions are to start automatic start-stop to control function, and the automatic start-stop function on dashboard panel controls display lamp and extinguishes.The automatic start-stop of ECM controls whether the information of function logic detection hardware input and CAN reception meets the established standards entering autostop.If met, will not allow access into autostop flag bit zero setting accordingly; if have the door position signal of driver side and seat belt to insert signal and show that driver leaves operator seat simultaneously; or detect that front hatch cover signal is opened, the most do not allow access into autostop；Only after hardware input all meets, just allow access into autostop.
While meeting hardware signal input logic, in addition it is also necessary to meet software and judge to enter the condition of autostop.After electromotor heat engine; the ECT of minimum entrance autostop is determined according to the ambient temperature detected; if the coolant temperature that can enter autostop arranges the lowest; when then having continuous start and stop operating mode, catalyst temperature is not enough so that the transformation efficiency of catalyst converter has the risk of decline；The gear box oil temperature of CAN it is dealt into from Transmission Control Module TCM and BCM; gearbox-gear; after the information of gear box oil pressure and accumulator all meets entrance autostop condition; when ECM detects that brake vacuum exceedes demarcation threshold value; normal danger signal exceedes demarcation threshold value speed simultaneously less than when demarcating threshold value; electromotor enters autostop state; now engine stop work; engine speed indicator instruction enters the state of flicker at the indicating positions of on off control function, control panel display lamp.
During autostop, brake pedal position remains stationary as, and engine speed is zero, and speed is zero.The electrical equipments such as the radio that accumulator is car load provide power supply.If compressor of air conditioner is required work, then start electromotor to provide enough compression energy；During autostop; the electric energy of accumulator is under the consumption of the electrical equipment of various work; electricity is gradually lowered; if downtime is longer; find when the battery information that IBS system detects is passed to ECM when the state of accumulator becomes the condition that can not meet autostop; start electromotor and be adjusted formula charging to accumulator, to ensure the energy of accumulator.Under altitude environment, braking for a long time, can cause the vacuum degree deficiency of brake vacuum assist, when electronic vacuum pump is also not enough to provide enough vacuum, electromotor to be started, to ensure the safety of brake.Gear when autostop should be always held at drive, if gear converts, then starts electromotor quickly to respond drive demand.
During autostop, trigger engine start without external signal, then, when driver prepares again to drive to leave, by getting off the brakes, pedal starts electromotor automatically.The brake pedal position ratio triggering Engine Start Signal enters the high certain calibration value of brake pedal position of autostop, can improve the comfortableness of startup.Send from electromotor and enable signals to produce moment of torsion typically during 0.3 second to 0.6 second, for reducing the delay of response, when control system detects that a demarcation range value between one of percentage is to 2 percent is reduced in the position of brake pedal within the program execution cycle of 12.5 milliseconds, control system sends enabling signal immediately, along with gradually rising of brake pedal position, electromotor can quickly export moment of torsion；If brake pedal is fast released and accelerator pedal is quickly stepped on, then ECM control system enters radical automatic start-up mode by quick opening throttle body on startup so that more moment of torsion is quickly generated, to improve driving.
If when autostop, from the uphill gradient signal that electric brake control module EBCM sends more than 5 degree time, trigger automatically actuated brake pedal signal ratio without the high certain calibration value of the brake pedal signal during gradient.In automatic start-up course, even if brake pedal discharges completely, remain in that the auxiliary brake of to two seconds, to ensure that driver's car load during transferring to accelerator pedal from brake pedal will not produce the possibility of rollback；If vehicle is parked in descending during autostop, then the brake pedal position triggered that automatically starts during level land is used to demarcate threshold value.
The coil that stretches out that present invention employs series-mode frame startup motor, the rotating coil of motor and the little tooth of engagement is controlled by two independent control terminals respectively.When electromotor is during initially entering the stopping process of 0.6 second to 1.5 seconds that autostop operating mode stops completely to electromotor; electromotor still has rotating speed; it is likely to occur negative rotating speed in the final stage shut down; if receiving the request Engine Start Signal of operating mode of changing mind during shutdown; engine speed when request according to operating mode of changing mind occurs is different, uses different startup strategies.When rotating speed is higher, engine speed can be allowed to recover by directly recovering fuel feeding；When rotating speed is relatively low, it is respectively adopted speed rotating speed match pattern and low speed engagement two kinds of match patterns of match pattern shorten the time returning to moment of torsion output time from the request generation time of operating mode of changing mind to engine speed.In speed rotating speed match pattern, use the rotating coil action first controlling motor, then control the coil that stretches out of motor, and in the case of certain motor rotary speed, motor and electromotor are engaged.In low speed engagement match pattern, use first control motor to stretch out coil motion, then wait that electromotor is born rotating speed and terminated to control the rotating coil action of motor soon again.Wherein in speed rotating speed match pattern, according to the voltage of battery and the temperature of battery, the time of the delay between two control coils is modified.When engine speed is below 20 revolution per seconds when operating mode of changing mind occurs, then wait that electromotor uses normal mode to start after totally stationary again, to prevent possible electromotor from bearing rotating speed, the hardware starting motor is produced infringement.
No matter in which kind of automatic start-up mode, if the engine start of ECM control system detection is unsuccessful, resets the most at once and start event registers, enter normal key start-up mode.
Claims (14)
1. control has the method for vehicle motor automatic start-stop for automatic gear-box, including detection about the speed of vehicle and the signal of the position of brake pedal,
Wherein, when the position of brake pedal drops to more than the first precalculated position, and when speed is less than predetermined threshold under the effect of brake, control electromotor and enter the duty of autostop；
The speed risen when the position of brake pedal rises to the second precalculated position or on the position of brake pedal exceedes predetermined threshold value, controls electromotor and restarts.
2. control has the method for vehicle motor automatic start-stop for manual transmission, including detection about the speed of vehicle and the signal of the position of clutch pedal,
Wherein, exceeding predetermined value when the position of clutch pedal drops to, the gear of change speed gear box is in neutral position state, and when speed is less than predetermined threshold under the effect of brake, controls electromotor and enter the duty of autostop；
When let slip the clutch again and when reaching precalculated position, control electromotor and restart.
3., according to the method for claim 1 or 2, also include:
The status information of detection accumulator；And the power request that detection car load equipment sends, when electromotor enters autostop state, controlling this accumulator provides the equipment of car load to power；If accumulator cannot meet the power request that car load equipment sends, then control electromotor and restart.
4. according to the method for claim 1 or 2; also include being triggered by the mode selecting button on control panel; and control functional indicator light instruction automatic start-stop by automatic start-stop and control the state of function; when entering automatic start-stop control model; mode selecting button flashes, and the pointer of engine speed indicator indicates in the autostop graduation indication position of non-zero rotating speed.
5. according to the method for claim 1 or 2, it is additionally included in electromotor when autostop state restarts, controls electronic throttle and quickly open, and control to provide for the electronic pump of gear box oil accumulation of energy the gear box oil of high pressure.
6., according to the method for claim 1 or 2, when being additionally included in relatively low engine speed, lingeringly control that the tandem of vehicle starts the rotating coil of motor and meshing gear stretches out coil.
7., according to the method for claim 1 or 2, also include detecting electromotor front hatch cover state position information, wherein when engine compartment cover is in open mode, stop the function of electromotor automatic start-stop.
8., according to the method for claim 1 or 2, also include detecting driver side door position signal, driver side seat belt insertion signal, wherein when judging that driver leaves steering position, stop the function of electromotor automatic start-stop.
9., according to the method for claim 1 or 2, also include the position recording the bidirectional cam axle of electromotor.
Method the most according to claim 1, wherein, in engine speed 1200 rpms, speed below 20 kilometer per hours, the position of brake pedal drops to and exceedes predetermined value simultaneously, controls electromotor and enters autostop state.
11. are less than described second precalculated position according to the method for claim 1 or 10, wherein said first precalculated position.
12. methods according to claim 3, the status information of described detection accumulator includes the electric current detecting real-time accumulator, the terminal voltage of accumulator, the temperature of accumulator, current charge volume, the startup function of accumulator, service life aging of accumulator.
13. methods according to claim 2, wherein, when detecting gear not at neutral gear, it is impossible to triggers automatic start-stop and controls function.
The electronic control system of 14. 1 kinds of vehicles, performs according to the method for any one in claim 1-13.
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