CN103253268B - A kind of automobile N keeps off the control method of start stop system - Google Patents
A kind of automobile N keeps off the control method of start stop system Download PDFInfo
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- CN103253268B CN103253268B CN201210431948.3A CN201210431948A CN103253268B CN 103253268 B CN103253268 B CN 103253268B CN 201210431948 A CN201210431948 A CN 201210431948A CN 103253268 B CN103253268 B CN 103253268B
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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 discloses the control method that a kind of automobile N keeps off start stop system, aim to provide one and effectively can improve fuel economy, reduce exhaust emissions; And have product low cost, the N being applicable to popularization and application keeps off the control method of start stop system.This system control method is as follows: one, after ignition lock opens driving engine, when meeting the following conditions simultaneously: A: the speed of a motor vehicle is less than threshold values Vf; A1: engine speed is greater than threshold values Fs1; B: vehicle is in braking mode; B1: brake system power-assisted degree of vacuum is greater than threshold values Zf; C: battery tension is greater than threshold values Uf; D: the gear of change-speed box is in N gear, and gear exceedes threshold values Tf in the residence time that N keeps off; Then driving engine enters N by running state and keeps off flameout state; Two, after key switch ignition start driving engine, when engine starting condition is met, then system sends " starting order " until make driving engine reenter starting state to driving engine, starter.
Description
Technical field
The present invention relates to field of automobile control, be specifically related to the control method that a kind of automobile N based on automatic transmission with hydraulic torque converter exploitation keeps off start stop system.
Background technology
Along with the continuous lifting of fuel price, fuel oil consumption speed, and motor vehicle exhaust emission causes air-polluting to increasingly sharpen, and society is also all the more strict to the requirement of automobile fuel consumption performance; For reducing fuel consumption rate, reduce vehicle exhaust and the various technology of air-polluting is received much concern.Along with the continuous application of up-to-date technology, the performance of driving engine is also increasingly mature; Single improve from engine performance, the control for fuel economy and exhaust emissions is also difficult for the moment larger breakthrough; Thus the theory of engine idle start-stop is applied in automotive control system.Engine start/stop refers to, when automobile be in idling mode and the speed of a motor vehicle lower than certain value time, engine off; Solve the problem to fuel oil consumption and exhaust emissions when automobile is in idling mode with this, thus improve fuel economy and reduce exhaust emissions.But current engine start/stop system is used in the vehicle of hybrid power; Although engine start/stop system is developed application in the high gear vehicle of some single powers, driving engine start and stop both at home and abroad at present all adopt braking start and stop pattern, namely when the speed of a motor vehicle is less than certain threshold value, and when brake pedal is effective, stop driving engine running; When brake pedal is released, driving engine automatic ignition starts.Because braking start and stop pattern energizing signal is car brakeing; therefore very easily cause some unnecessary frequent start-stops; not only obviously have impact on the dynamic response characteristics of vehicle; and block up, when namely needing most to utilize the fuel-economizing of start and stop function with car; this inconvenience is just all the more obvious, even causes engine down time too short (as being less than 6 ~ 8 seconds) to cause excessive fuel consumption more because of frequent start-stop.Market practice proves: the user having braking start and stop in a large number, owing to using inconvenience, closes this function all for a long time; And relate to vehicle safety due to braking start and stop, therefore need arrange high precision sensor special and carry out monitoring, protecting, and need adopt multiple reinforced member therefore time-to-market is long, productive costs is high and usability is poor; Be not suitable for popularization and application; Thus how to design one effectively to improve fuel economy, reduce exhaust emissions; And easy to use, oil-saving effect is obvious, and productive costs is low, and time-to-market is short, is extremely necessary when being applicable to control system and the control method of popularization and application.
Summary of the invention
The object of the invention is to use inconvenience to overcome when existing Jake brake start and stop start stop system is applied in the vehicle of single power, oil-saving effect is not obvious, productive costs is high, time-to-market is long, be not suitable for the problem of popularization and application, provide one not only easy to use, flexible, reliable and effectively can improve fuel economy, reduction exhaust emissions; And produce low cost, time-to-market is short, the automobile N being applicable to popularization and application keeps off the control method of start stop system.This control method is improve safety and the development of latent energy-saving potential of vehicle operating further simultaneously, carries out integrating control according to different condition to various functions such as car door, vehicle window, car lights.
Technical scheme of the present invention is:
Automobile N keeps off a control method for start stop system, it is characterized in that,
One, after key switch ignition start driving engine, when meeting the following conditions simultaneously:
A: the speed of a motor vehicle is less than threshold value Vf, or the speed of a motor vehicle is zero;
A1: engine speed is greater than threshold value Fs1;
B: vehicle is in braking mode;
B1: brake system power-assisted degree of vacuum is greater than threshold value Zf;
C: battery tension is greater than threshold value Uf;
D: the gear of change-speed box is in N gear, and the residence time that gear keeps off at N exceedes threshold value Tf; Then driving engine enters N by running state and keeps off flameout state;
Two, after key switch ignition start driving engine, and meet the following conditions:
A: vehicle is in braking mode;
B: the speed of a motor vehicle is less than threshold value Vf;
C: engine speed is less than threshold value Fs1;
D: gear is kept off by N and entering " D " keep off or " R " gear, or manual " S1 " gear in auto-manual; Then system sends " starting order " until make driving engine reenter starting state to driving engine, starter.
The control policy of this programme is: after key switch ignition start driving engine, when automobile speed is less than threshold value Vf, such as, when the speed of a motor vehicle is less than 2Km/h, be in extremely low moving velocity at this automobile, or when automobile is in of short duration dead ship condition; Can be determined whether by artificial judgement being necessary engine off, reach the object improving fuel economy, reduce exhaust emissions with this; The start-stop operation of driving engine is convenient, fast simultaneously.
Because the control policy of this programme can determine whether by artificial judgement being necessary engine off; Such as, when traffic intersection waits for green light, automobile is in of short duration dead ship condition; Now chaufeur can judge: if red time is longer, the gear of automatic transmission with hydraulic torque converter can be linked into N gear by chaufeur, exceed threshold value Tf when the residence time that gear keeps off at N, driving engine will automatically enter N by idling state and keep off flameout state, i.e. engine off; Be in the consumption of driving engine to fuel oil and the emission problem of tail gas of idling mode when effectively can solve parking of automobile like this, thus improve fuel economy and reduce exhaust emissions; If red time is shorter only have 1 to 2 second, now the gear of automatic transmission with hydraulic torque converter can be retained in D gear by chaufeur, can avoid the start-stop that driving engine repeats at short notice like this; Effective solution driving engine repeats start-stop at short notice, not only can not improve fuel economy, also can aggravate the problem to fuel oil consumption.In addition, the engine start/stop of this programme is easy to operate; After key switch ignition start driving engine, when the speed of a motor vehicle is less than threshold value Vf, or the speed of a motor vehicle is zero; As long as gear to be linked into N gear, when gear exceedes threshold value Tf in the residence time that N keeps off, driving engine keeps off flameout state by automatically entering N; And once gear leaves N gear, then driving engine automatic ignition starts.In addition; it is the judgement artificial according to chaufeur that the N of this programme keeps off start stop system; and by chaufeur M/C gear control automobile whether enter N keep off flameout state; thus a large amount of intelligent equipments is not needed to carry out monitoring and protecting; do not need to carry out large change to the original structure of automobile and equipment yet; it produces low cost, and time-to-market is short, is applicable to popularization and application.
Vehicle is in braking mode and enters N as driving engine and keep off flameout state and again by the necessary condition of starting by this programme, it is the safety in order to improve Dynamic System, under avoiding driving engine to be in N gear flameout state, gear moved by false touch and leave N gear enter " D " gear or " R " gear, or manual " S1 " in auto-manual is when keeping off, engine starting, automobile is scurried out suddenly.In addition, after gear hangs N gear and neutral, driving engine and drive wheel will be separated, and the brake action of driving engine will no longer be applied on drive wheel, and now automobile easily produces movement; Thus require that vehicle is in braking mode, driving engine can enter N and keep off flameout state; Like this after gear hangs N gear, automobile can not slippage; Improve travel safety.
Brake system power-assisted degree of vacuum is greater than threshold value Zf and enters as driving engine the necessary condition that N keeps off flameout state by this programme; Its reason is generally all have vacuum boost system in the brake system of current automobile, and ensure that brake system has enough power-assisted degree of vacuum, still failure-free brake boost can be provided like this at engine off final vacuum force aid system, and then ensure that brake system can provide failure-free braking force, improve traffic safety performance.
Engine speed is greater than threshold value Fs1 and enters as driving engine the necessary condition that N keeps off flameout state by this programme, is in order to after key switch ignition start driving engine, when causing engine off because of vehicle failure; Avoid this programme system to send flame-out instruction to driving engine, make driving engine enter the problem of N gear flameout state.Under driving engine is in idling mode, the minimum speed of maintenance is all greater than 600r/min usually; So when the rotating speed of driving engine is less than 600r/min, usually can be judged as that driving engine is in flameout state.Thus the threshold value Fs1 of this programme is set to be less than 600r/min.When systems axiol-ogy is greater than threshold value Fs1 to engine speed, can tentatively judge that driving engine is in starting state; So just can avoid after key switch ignition start driving engine, when causing engine off because of vehicle failure; System sends flame-out instruction to driving engine, makes driving engine enter the problem of N gear flameout state.
On the other hand, owing to there is following problem in actual use: under driving engine is in N gear flameout state, keep off or " R " gear when gear is linked into " D " by " N " gear, or when manual " S1 " in auto-manual keeps off; Now system will send " cranking signal " to driving engine, although driving engine receives " cranking signal ", may there is the problem of engine starting failure; And once after engine starting failure, then need chaufeur again to be killed engine by key switch, then again by key switch ignition start; Operate so just very inconvenient.The control method of this programme can effectively solve the problem; This programme is by the following condition of Real-Time Monitoring: D: vehicle is in braking mode; E: driving engine is in flameout state, and engine speed is less than threshold value Fs; F: the speed of a motor vehicle is less than threshold value Vf; G: gear is in " D " keeps off or " R " gear, or manual " S1 " gear in auto-manual; When these conditions are met, then system makes driving engine reenter starting state to driving engine transmission " ignition start instruction ".As long as if the above-mentioned starting conditions of engine starting failure meets, then system will send " ignition start instruction " until make driving engine reenter starting state to driving engine again.
As preferably, threshold value Tf can be set by any one mode following:
Mode one: threshold value Tf is set to be more than or equal to 0.3 second;
The span of mode two: threshold value Tf between 0.1 second to 1 second, and arranges the adjustable timing knob that can be used for regulating threshold value Tf on auto meter, and adjustable timing knob is provided with scale;
Mode three: be provided with initial value tc and actual acquisition value ts in system;
Initial value tc is set between 0.1 second to 1 second;
The method to set up of actual acquisition value ts is as follows:
First, gather driving engine to be each time in N and to keep off after flameout state gear and kept off hanging to D by N and keep off time t1 used, until collect n1 t1 value; Then calculate the aviation value of n1 t1 value, and this aviation value is set as actual acquisition value ts;
First stage: before the setting that system does not complete actual acquisition value ts, threshold value Tf value is initial value tc;
Subordinate phase: when after the setting that system completes for the first time to actual acquisition value ts, whether system will provide prompting and " adopt learning functionality to arrange Tf "; If "Yes", threshold value Tf will be set to actual acquisition value ts; If "No", threshold value Tf will continue to use original setting value;
Phase III: system resets actual acquisition value ts, namely system restarts to gather after driving engine is each time in N gear flameout state and keeps off extension to D gear time t1 used, until collect n1 t1 value by N; Then, recalculate the aviation value of n1 t1 value, and this aviation value is set to new actual acquisition value ts;
After system obtains new actual acquisition value ts, whether system again will provide prompting and " adopt learning functionality to arrange Tf ", if "Yes", threshold value Tf will be set to new actual acquisition value ts; If "No", threshold value Tf will continue to use original setting value;
Fourth stage: return the phase III, circulates with this.
Mode four: be provided with initial value tc in system, discriminant value tp and final value tz; Described automatic transmission with hydraulic torque converter TCU is provided with time acquisition module;
Initial value tc is between 0.3 second to 0.6 second;
The establishing method of discriminant value tp is as follows:
First, keep off to D the time t2 experienced for each time by R gear by front m is individual in the actual process of putting into gear of time acquisition module collection chaufeur; And front m is kept off to R the time t3 experienced for each time by D gear;
Then, retain t2 and the t3 value being less than 1 second, and select the numerical value closest to 1 second wherein, this numerical value is discriminant value tp;
The establishing method of described final value tz is as follows:
When discriminant value tp is more than or equal to 0.3 second, final value tz is set as identical with discriminant value tp; When discriminant value tp is less than 0.3 second, final value tz is set as 0.3 second;
When system does not complete the setting to discriminant value tp, threshold value Tf value is initial value tc;
Complete after to discriminant value tp and final value tz setting in system, threshold value Tf value is final value tz.
Mode one: threshold value Tf is set to be more than or equal to 0.5 second; Because gear is kept off in the process of R gear to D gear or by D by R gear, gear will keep off through N; Thus threshold value Tf is set to and is more than or equal to 0.5 second; Keep off to D gear when position by R like this or kept off by D in the process of R gear, gear when N keeps off, will can not make driving engine enter N and keep off flameout state, avoid misoperation.
Mode two: the concrete numerical value being regulated threshold value Tf by adjustable timing knob, is convenient to different chaufeurs like this and regulates threshold value Tf according to the needs of self.
Mode three: because the operating speed of different chaufeur when putting into gear is different; In order to improve the comformability of system, while avoiding misoperation, maximum guarantee fuel economy, after this programme is in N gear flameout state by collection driving engine, when gear is reset driving engine by N gear extension to D gear by chaufeur, chaufeur keeps off extension by N and keeps off time t1 used to D in actual operating process of putting into gear; Then calculate aviation value according to several t1 values collected, and this aviation value is set as actual acquisition value ts.Actual acquisition value ts reacts chaufeur in actual speed of putting into gear of putting into gear in operating process; Thus, after the setting completed actual acquisition value ts in system, whether system will provide prompting and " adopt learning functionality to arrange Tf "; Such chaufeur can set the most accurate Tf value according to the actual conditions of self, while avoiding misoperation, farthest ensures fuel economy.
On the other hand, may change car owner due to same car or change chaufeur, thus system is after the setting completing an actual acquisition value ts, can re-start and gathers t1 value and re-start the next actual acquisition value ts of setting; After system obtains new actual acquisition value ts, whether system again will provide prompting and " adopt learning functionality to arrange Tf "; Even if after automobile changes car owner or replacing chaufeur like this, system will re-start and gathers and set; Set the most accurate Tf value according to actual conditions, while avoiding misoperation, farthest ensure fuel economy.
Mode four: because the operating speed of different chaufeur when putting into gear is different; In order to improve the comformability of system, while avoiding misoperation, farthest ensure fuel economy, this programme keeps off to D the time t4 experienced for each time by R gear by front m is individual in the actual process of putting into gear of time acquisition module collection car owner; And front m is kept off to R the time t5 experienced for each time by D gear; Detect the actual speed of putting into gear of car owner.In general being kept off by R gear to D or keep off the time used by D gear to R can not more than 1 second, and thus will retain t4 and the t5 value being less than 1 second, these collection values can think effective value; Then in these t4 and t5 values, select the numerical value closest to 1 second, and this numerical value is set to discriminant value t2; That is discriminant value t2 keeps off to D gear by R in the actual process of putting into gear of this car owner or keeps off to the R gear used time once the longest by D.When discriminant value t2 is more than or equal to 0.3 second, final value t3 is set as identical with discriminant value t2; Simultaneously using final value t3 as threshold value Tf; Such gear is kept off by R and keeping off in the process of R gear to D gear or by D, and the time that gear is detained at N gear can not be greater than threshold value Tf, can avoid making driving engine enter N gear flameout state, produce misoperation.When discriminant value t2 is less than 0.3 second, final value t3 is set as 0.3 second; Also be in order to avoid final value t3 is too little, and make threshold value Tf too small; Keep off to D gear at gear by R or kept off by D in the process of R gear, making driving engine enter N and keep off flameout state, produce misoperation.
As preferably, when driving engine be in N keep off flameout state time, the power of Der Scheinwerfer mit FernlichtAbblendlichtStandlicht by between 30% to 50% of headlight power when being reduced to engine operating state or downshift run.This programme the object that can play energy-saving and emission-reduction is further set.
As preferably, keep off flameout state when driving engine is in N, then start the braking function in electronic parking or ABS system immediately;
Being in N at driving engine keeps off in the process of flameout state, when two sudden strain of a muscle button is pressed, then removes the braking function of braking function in ABS system or electronic parking immediately;
When driving engine reenters starting state by N gear flameout state, then remove the braking function in electronic parking or ABS system immediately.
Keep off flameout state when driving engine is in N, then start the braking function in electronic parking or ABS system immediately, so not only can improve travel safety, and when stopping, chaufeur does not need to slam brake pedal, can improve driver comfort always.When vehicle failure needs trailer, as long as press two sudden strain of a muscle button; Then be in the braking function that the N vehicle kept off under flameout state will automatically terminate braking function in ABS system or electronic parking; Ensure that disabled vehicle can be dragged away smoothly.
Automobile N keeps off a control method for start stop system, after key switch ignition start driving engine, when meeting the following conditions simultaneously:
A: the speed of a motor vehicle is less than threshold value Vf, or the speed of a motor vehicle is zero;
A1: engine speed is greater than threshold value Fs1;
B: vehicle is in braking mode;
B1: brake system power-assisted degree of vacuum is greater than threshold value Zf;
C: battery tension is greater than threshold value Uf;
D: the gear of change-speed box is in N gear, and the residence time that gear keeps off at N exceedes threshold value Tf; Then driving engine enters N by running state and keeps off flameout state;
Keep off flameout state when driving engine is in N, and meet the following conditions:
E: vehicle is in braking mode;
F: driving engine is in flameout state, and engine speed is less than threshold value Fs1;
G: the speed of a motor vehicle is less than threshold value Vf;
H: gear is in " D " keeps off or " R " gear, or manual " S1 " gear in auto-manual; Then driving engine reenters starting state.
As preferably, keep off flameout state when driving engine is in N, then start the braking function in electronic parking or ABS system immediately;
Being in N at driving engine keeps off in the process of flameout state, when two sudden strain of a muscle button is pressed, then removes the braking function of braking function in ABS system or electronic parking immediately;
When driving engine reenters starting state by N gear flameout state, then remove the braking function in electronic parking or ABS system immediately;
When driving engine be in N keep off flameout state time, the power of Der Scheinwerfer mit FernlichtAbblendlichtStandlicht by between 30% to 50% of headlight power when being reduced to engine operating state or downshift run.
Automobile N keeps off a control method for start stop system,
One, after key switch ignition start driving engine; When meeting the following conditions simultaneously:
A: the speed of a motor vehicle is less than threshold value Vf, or the speed of a motor vehicle is zero;
A1: engine speed is greater than threshold value Fs1;
B: vehicle is in braking mode;
B1: brake system power-assisted degree of vacuum is greater than threshold value Zf;
C: battery tension is greater than threshold value Uf;
D: Engine Coolant Temperature is higher than threshold value Ff;
D1: gearbox oil temperature is higher than threshold value Bf;
E: the gear of change-speed box is in N gear, and the residence time that gear keeps off at N exceedes threshold value Tf; Then driving engine enters N by running state and keeps off flameout state;
Two, after key switch ignition start driving engine, when meeting the following conditions simultaneously:
A: vehicle is in braking mode;
B: driving engine is in flameout state, and engine speed is less than threshold value Fs1;
C: the speed of a motor vehicle is less than threshold value Vf;
D: car door is in closed condition;
E: gear is in " D " keeps off or " R " gear, or manual " S1 " gear in auto-manual; Then system sends " starting order " until make driving engine reenter starting state to driving engine, starter.
This programme requires Engine Coolant Temperature higher than threshold value Ff and gearbox oil temperature higher than threshold value Bf; That under driving engine is in low-temperature condition, frequent starting driving engine is unfavorable for fuel-economizing because work efficiency when driving engine is in low-temperature condition is lower; And the too low fluid thickness that makes of gearbox oil temperature, change-speed box service life can be affected.In addition, this programme car car door of will demanding perfection latches and full car vehicle window is closed; Because full car car door such car door that latches can not be opened, ensure driving engine by N keep off flameout state reset time, car door keeps closed condition, improves travel safety.
As preferably, keep off flameout state when driving engine is in N, then start the braking function in electronic parking or ABS system immediately;
Being in N at driving engine keeps off in the process of flameout state, when two sudden strain of a muscle button is pressed, then removes the braking function of braking function in ABS system or electronic parking immediately;
When driving engine reenters starting state by N gear flameout state, then remove the braking function in electronic parking or ABS system immediately;
When driving engine be in N keep off flameout state time, the power of Der Scheinwerfer mit FernlichtAbblendlichtStandlicht by between 30% to 50% of headlight power when being reduced to engine operating state or downshift run.
The invention has the beneficial effects as follows: easy to use, flexible, reliable, effectively can improve fuel economy, reduce exhaust emissions; And have product low cost, time-to-market is short, be applicable to the feature of popularization and application.
Accompanying drawing explanation
Fig. 1 is a kind of control flow chart that a kind of automobile N of the present invention keeps off the control method of start stop system.
Detailed description of the invention
Below in conjunction with accompanying drawing and detailed description of the invention, the present invention is described in further detail:
Embodiment 1: a kind of automobile N keeps off the control method of start stop system, comprises CAN, is connected to Engine ECU in CAN and automatic transmission with hydraulic torque converter TCU by wire harness, and car speed sensor.Automatic transmission with hydraulic torque converter TCU is provided with N and keeps off start-stop control module.N keeps off start-stop control module and is provided with delays time to control module and time acquisition module.Above-mentioned delays time to control module can also be replaced by time relay.
One, after key switch ignition start driving engine; When meeting the following conditions simultaneously: (referring to Fig. 1)
A: the speed of a motor vehicle is less than threshold value Vf, or the speed of a motor vehicle is zero, and this threshold value Vf value is 2Km/h.
A1: engine speed is greater than threshold value Fs1; This threshold value Fs1 value is 200r/min.
B: vehicle is in braking mode.
B1: brake system power-assisted degree of vacuum is greater than threshold value Zf; This threshold value Zf value is 0.2bar.
C: battery tension is greater than threshold value Uf; This threshold value Uf value is 7.8V.
D: the gear of change-speed box is in N gear, and the residence time that gear keeps off at N exceedes threshold value Tf; Then flame-out instruction is sent in Engine ECU by CAN by N gear start-stop control module, and engine ECU controls engine enters N by running state and keeps off flameout state.
Two, after key switch ignition start driving engine, and meet the following conditions:
A: vehicle is in braking mode;
B: the speed of a motor vehicle is less than threshold value Vf; This threshold value Vf value is 2Km/h.
C: engine speed is less than threshold value Fs1; This threshold value Fs1 value is 200r/min.
D: gear is kept off by N and enters " D " gear or " R " gear, or manual " S1 " gear in auto-manual; Then " starting order " is sent on Engine ECU and starter until driving engine ignition start again by CAN by N gear start-stop control module.
Because the minimum speed maintained when driving engine is in idling mode is all greater than 600r/min usually; So when the rotating speed of driving engine is less than 600r/min, usually can be judged as that driving engine is in flameout state.Above-mentioned threshold value Fs1 can in 20r/min to 600r/min value.
Above-mentioned threshold value Tf can be set by any mode in following four kinds of modes:
Mode one: directly threshold value Tf is set to be more than or equal to 0.3 second.
The span of mode two: threshold value Tf is between 0.1 second to 1 second; And on auto meter, arrange the adjustable timing knob that can be used for regulating threshold value Tf, and adjustable timing knob is provided with scale.Regulated the concrete numerical value of threshold value Tf by adjustable timing knob, be convenient to different chaufeurs like this and regulate threshold value Tf according to the needs of self.
Mode three: be provided with initial value tc and actual acquisition value ts in system;
Initial value tc is set to 0.6 second;
The method to set up of actual acquisition value ts is as follows:
First, gather driving engine to be each time in N and to keep off after flameout state gear and kept off hanging to D by N and keep off time t1 used, until collect n1 t1 value; Then calculate the aviation value of n1 t1 value, and this aviation value is set as actual acquisition value ts; The preferable range of n1 is between 20 to 100.
First stage: before the setting that system does not complete actual acquisition value ts, threshold value Tf value is initial value tc.
Subordinate phase: when after the setting that system completes for the first time to actual acquisition value ts, whether system will provide prompting and " adopt learning functionality to arrange Tf "; If "Yes", threshold value Tf will be set to actual acquisition value ts; If "No", threshold value Tf will continue to use original setting value.
Phase III: system resets actual acquisition value ts, namely system restarts to gather after driving engine is each time in N gear flameout state and keeps off extension to D gear time t1 used, until collect n1 t1 value by N; Then, carry out the data processings such as numerical filter, recalculate the aviation value of n1 t1 value, and this aviation value is set to new actual acquisition value ts.The preferable range of n1 is between 10 to 100.
After system obtains new actual acquisition value ts, whether system again will provide prompting and " adopt learning functionality to arrange Tf ", if "Yes", threshold value Tf will be set to new actual acquisition value ts; If "No", threshold value Tf will continue to use original setting value.
Fourth stage: return the phase III, circulates with this.
Mode four: be provided with initial value tc in system, discriminant value tp and final value tz.Automatic transmission with hydraulic torque converter TCU is provided with time acquisition module.
Initial value tc is 0.4 second.
The establishing method of discriminant value tp is as follows:
First, keep off to D the time t2 experienced for each time by R gear by front m is individual in the actual process of putting into gear of time acquisition module collection chaufeur; And front m is kept off to R the time t3 experienced for each time by D gear; The preferable range of m is between 30 to 100.
Then, retain t2 and the t3 value being less than 1 second, and select the numerical value closest to 1 second wherein, this numerical value is discriminant value tp.
The establishing method of described final value tz is as follows:
When discriminant value tp is more than or equal to 0.3 second, final value tz is set as identical with discriminant value tp; When discriminant value tp is less than 0.3 second, final value tz is set as 0.3 second.
When system does not complete the setting to discriminant value tp, threshold value Tf value is initial value tc; Complete after to discriminant value tp and final value tz setting in system, threshold value Tf value is final value tz.
It is normally stopped working by key that N of the present invention keeps off the judgement driving engine that start stop system control method can be clear and definite, is still in N and keeps off flameout state; If driving engine is normally stopped working by key, even if driving engine is in N keep off flameout state, and above-mentioned starting conditions meets, and driving engine also can not start, must by key switch ignition start.
When driving engine be in N keep off flameout state time, 40% or downshift of headlight power when being reduced to engine operating state is run by the power of Der Scheinwerfer mit FernlichtAbblendlichtStandlicht.When driving engine reenters starting state by N gear flameout state, headlight power recovers state during engine work.Keep off flameout state when driving engine is in N, then start the braking function in electronic parking or ABS system immediately.When driving engine reenters starting state by N gear flameout state, then remove the braking function in electronic parking or ABS system immediately.Being in N at driving engine keeps off in the process of flameout state, when two sudden strain of a muscle button is pressed, then removes the braking function of braking function in ABS system or electronic parking immediately.Ensure that, when vehicle failure needs trailer, disabled vehicle can be dragged away smoothly.
N of the present invention keeps off start stop system control method and is particularly useful for when traffic intersection waits for green light or traffic congestion, and automobile uses under being in of short duration dead ship condition.Chaufeur can judge whether to need to make driving engine enter the flame-out state of N gear according to actual conditions; If desired the time waited for is longer, then chaufeur only needs the gear of automatic transmission with hydraulic torque converter to be linked into N, when gear exceedes threshold value Tf in the residence time that N keeps off is, driving engine will automatically enter N by idling state and keep off flameout state, i.e. engine off.Only need when starting to walk gear to be linked into D gear, driving engine automatic ignition starts, easy to operate.If the time waited for is very short, the gear of automatic transmission with hydraulic torque converter then can be retained in D gear by chaufeur, and the start-stop repeated at short notice to avoid driving engine, aggravates the consumption to fuel oil.
Embodiment 2: a kind of automobile N keeps off the control method of start stop system, after key switch ignition start driving engine; When meeting the following conditions simultaneously: (referring to Fig. 1)
A: the speed of a motor vehicle is less than threshold value Vf, or the speed of a motor vehicle is zero; This threshold value Vf is less than or equal to 2Km/h.
A1: engine speed is greater than threshold value Fs1; This threshold value Fs1 value is 200r/min.
B: vehicle is in braking mode.
B1: brake system power-assisted degree of vacuum is greater than threshold value Zf; This threshold value Zf value is 0.2bar.
C: battery tension is greater than threshold value Uf; This threshold value Uf value is 7.8V.
D: the gear of change-speed box is in N gear, and the residence time that gear keeps off at N exceedes threshold value Tf; Then driving engine enters N by running state and keeps off flameout state.
Keep off flameout state when driving engine is in N, and meet the following conditions:
E: vehicle is in braking mode.
F: driving engine is in flameout state, and engine speed is less than threshold value Fs1.Threshold value Fs1 value is 200r/min.
G: the speed of a motor vehicle is less than threshold value Vf.Threshold value Vf value is 2km/h.
H: gear is in " D " keeps off or " R " gear, or manual " S1 " gear in auto-manual; Then system makes driving engine reenter starting state to driving engine, starter transmission " starting order ".
Because the minimum speed maintained when driving engine is in idling mode is all greater than 600r/min usually; So when the rotating speed of driving engine is less than 600r/min, usually can be judged as that driving engine is in flameout state.Above-mentioned threshold value Fs1 can in 20r/min to 600r/min value.
When driving engine be in N keep off flameout state time, 38% or downshift of headlight power when being reduced to engine operating state is run by the power of Der Scheinwerfer mit FernlichtAbblendlichtStandlicht.When driving engine reenters starting state by N gear flameout state, headlight power recovers state during engine work.Keep off flameout state when driving engine is in N, then start the braking function in electronic parking or ABS system immediately.When driving engine reenters starting state by N gear flameout state, then remove the braking function in electronic parking or ABS system immediately.Being in N at driving engine keeps off in the process of flameout state, when two sudden strain of a muscle button is pressed, then removes the braking function of braking function in ABS system or electronic parking immediately.Ensure that, when vehicle failure needs trailer, disabled vehicle can be dragged away smoothly.The setting means of the threshold value Tf of the present embodiment is with reference to embodiment 1.
Embodiment 3: a kind of automobile N keeps off the control method of start stop system, comprise CAN, be connected to Engine ECU in CAN and automatic transmission with hydraulic torque converter TCU by wire harness, and the speed of a motor vehicle, ABS system, electronics parking brake, brake pedal, door lock, vehicle window, headlight, battery tension, Engine Coolant Temperature are high and the monitoring sensor such as gearbox oil temperature.Automatic transmission with hydraulic torque converter TCU is provided with N and keeps off start-stop control module.N keeps off start-stop control module and is provided with delays time to control module and time acquisition module.Above-mentioned delays time to control module can also be replaced by time relay.
One, after key switch ignition start driving engine, when meeting the following conditions simultaneously: (referring to Fig. 1)
A: the speed of a motor vehicle is less than threshold value Vf, or the speed of a motor vehicle is zero.This threshold value Vf value is 2Km/h.
A1: engine speed is greater than threshold value Fs1; This threshold value Fs1 value is 200r/min.
B: vehicle is in braking mode.
B1: brake system power-assisted degree of vacuum is greater than threshold value Zf; This threshold value Zf value is 0.2bar.
C: battery tension is greater than threshold value Uf; This threshold value Uf value is 7.8V.
D: Engine Coolant Temperature is higher than threshold value Ff; This threshold value Ff value is 60 degree.
D1: gearbox oil temperature is higher than threshold value Bf; This threshold value Bf value is 60 degree.
E: the gear of change-speed box is in N gear, and the residence time that gear keeps off at N exceedes threshold value Tf; N then on change-speed box TCU keeps off start-stop control module and is sent in Engine ECU by CAN by flame-out instruction, and engine ECU controls engine enters N by running state and keeps off flameout state.
Two, after key switch ignition start driving engine, when meeting the following conditions simultaneously:
A: vehicle is in braking mode.
B: driving engine is in flameout state, and engine speed is less than threshold value Fs1.Threshold value Fs1 value is 200r/min.
C: the speed of a motor vehicle is less than threshold value Vf.Threshold value Vf value is 2km/h.
D: car door is in closed condition.
E: gear is in " D " keeps off or " R " gear, or manual " S1 " gear in auto-manual;
Then " starting order " is sent on Engine ECU and starter until driving engine ignition start again by CAN by N gear start-stop control module.
Because the minimum speed maintained when driving engine is in idling mode is all greater than 600r/min usually; So when the rotating speed of driving engine is less than 600r/min, usually can be judged as that driving engine is in flameout state.Above-mentioned threshold value Fs1 can in 20r/min to 600r/min value.
When driving engine be in N keep off flameout state time, 40% or downshift of headlight power when being reduced to engine operating state is run by the power of Der Scheinwerfer mit FernlichtAbblendlichtStandlicht.Keep off flameout state when driving engine is in N, then start the braking function in electronic parking or ABS system immediately.When driving engine reenters starting state by N gear flameout state, then remove the braking function in electronic parking or ABS system immediately, the state simultaneously during car light recovery engine work.Being in N at driving engine keeps off in the process of flameout state, when two sudden strain of a muscle button is pressed, then removes the braking function in electronic parking or ABS system.The setting means of the threshold value Tf of the present embodiment is with reference to embodiment 1.
Embodiment 4: a kind of automobile N keeps off the control method of start stop system,
One, after key switch ignition start driving engine, when meeting the following conditions simultaneously:
A: the speed of a motor vehicle is less than threshold value Vf, or the speed of a motor vehicle is zero.This threshold value Vf value is 2Km/h.
B: vehicle is in braking mode.
B1: brake system power-assisted degree of vacuum is greater than threshold value Zf; This threshold value Zf value is 0.2bar.
C: the gear of change-speed box is in N gear, and the residence time that gear keeps off at N exceedes threshold value Tf; Then driving engine enters N by running state and keeps off flameout state.
Two, after key switch ignition start driving engine, when meeting the following conditions simultaneously:
A: vehicle is in braking mode.
B: driving engine is in flameout state, and engine speed is less than threshold value Fs1; This threshold value Fs1 value is 200r/min.
C: the speed of a motor vehicle is less than threshold value Vf; This threshold value Vf value is 2Km/h.
D: gear is in " D " keeps off or " R " gear, or manual " S1 " gear in auto-manual; Then system sends " starting order ", until make driving engine reenter starting state to driving engine, starter.
Because the minimum speed maintained when driving engine is in idling mode is all greater than 600r/min usually; So when the rotating speed of driving engine is less than 600r/min, usually can be judged as that driving engine is in flameout state.Above-mentioned threshold value Fs1 can in 50r/min to 600r/min value.When driving engine be in N keep off flameout state time, 38% or downshift of headlight power when being reduced to engine operating state is run by the power of Der Scheinwerfer mit FernlichtAbblendlichtStandlicht.When driving engine reenters starting state by N gear flameout state, headlight power recovers state during engine work.Keep off flameout state when driving engine is in N, then start the braking function in electronic parking or ABS system immediately.When driving engine reenters starting state by N gear flameout state, then remove the braking function in electronic parking or ABS system immediately.Being in N at driving engine keeps off in the process of flameout state, when two sudden strain of a muscle button is pressed, then removes the braking function of braking function in ABS system or electronic parking immediately.Ensure that, when vehicle failure needs trailer, disabled vehicle can be dragged away smoothly.The setting means of the threshold value Tf of the present embodiment is with reference to embodiment 1.
Embodiment 5: a kind of automobile N keeps off the control method of start stop system, comprise CAN, be connected to Engine ECU in CAN and automatic transmission with hydraulic torque converter TCU by wire harness, and the speed of a motor vehicle, ABS system, electronics parking brake, brake pedal, door lock, vehicle window, headlight, battery tension, Engine Coolant Temperature are high and the monitoring sensor such as gearbox oil temperature.Automatic transmission with hydraulic torque converter TCU is provided with N and keeps off start-stop control module.N keeps off start-stop control module and is provided with delays time to control module and time acquisition module.Above-mentioned delays time to control module can also be replaced by time relay.
One, after key switch ignition start driving engine, when meeting the following conditions simultaneously: (referring to Fig. 1)
A: the speed of a motor vehicle is less than threshold value Vf, or the speed of a motor vehicle is zero.This threshold value Vf value is 2Km/h.
A1: engine speed is greater than threshold value Fs1; This threshold value Fs1 value is 200r/min.
B: vehicle is in braking mode.
B1: brake system power-assisted degree of vacuum is greater than threshold value Zf; This threshold value Zf value is 0.2bar.
C: battery tension is greater than threshold value Uf; This threshold value Uf value is 7.8V.
D: Engine Coolant Temperature is higher than threshold value Ff; This threshold value Ff value is 60 degree.
D1: gearbox oil temperature is higher than threshold value Bf; This threshold value Bf value is 60 degree.
E: full car car door latches; When systems axiol-ogy does not latch to car door, system sends instruction makes car door automatically latch.
F: full car vehicle window is closed; When systems axiol-ogy is not closed to vehicle window, system sends instruction makes vehicle window automatically close.
G: the gear of change-speed box is in N gear, and the residence time that gear keeps off at N exceedes threshold value Tf; N then on change-speed box TCU keeps off start-stop control module and is sent in Engine ECU by CAN by flame-out instruction, and engine ECU controls engine enters N by running state and keeps off flameout state.
Two, after key switch ignition start driving engine; When meeting the following conditions simultaneously:
A: battery tension is greater than threshold value Uf; This threshold value Uf value is 7.8V.
B: Engine Coolant Temperature is higher than threshold value Ff; This threshold value Ff value is 60 degree.
B1: gearbox oil temperature is higher than threshold value Bf; This threshold value Bf value is 60 degree.
C: vehicle is in braking mode;
D: driving engine is in flameout state, and engine speed is less than threshold value Fs1.Threshold value Fs1 value is 500r/min.
E: the speed of a motor vehicle is less than threshold value Vf.Threshold value Vf value is 2km/h.
F: car door is in closed condition.
G: gear is in " D " keeps off or " R " gear, or manual " S1 " gear in auto-manual; Then " starting order " is sent on Engine ECU and starter until driving engine ignition start again by CAN by N gear start-stop control module.
Because the minimum speed maintained when driving engine is in idling mode is all greater than 600r/min usually; So when the rotating speed of driving engine is less than 600r/min, usually can be judged as that driving engine is in flameout state.Above-mentioned threshold value Fs1 can in 20r/min to 600r/min value.When driving engine be in N keep off flameout state time, 38% or downshift of headlight power when being reduced to engine operating state is run by the power of Der Scheinwerfer mit FernlichtAbblendlichtStandlicht.Keep off flameout state when driving engine is in N, then start the braking function in electronic parking or ABS system immediately.When driving engine reenters starting state by N gear flameout state, then remove the braking function in electronic parking or ABS system immediately.Being in N at driving engine keeps off in the process of flameout state, when two sudden strain of a muscle button is pressed, then removes the braking function in electronic parking or ABS system.When meeting the following conditions: " vehicle is in braking mode ", " driving engine is in flameout state; and engine speed is less than threshold value Fs ", " speed of a motor vehicle is less than threshold value Vf ", " gear is in " D " gear or " R " gear; or manual " S1 " gear in auto-manual ", then car light recovery engine work time state.When systems axiol-ogy is not closed to car door, audible and visible alarm will be sent." full car car door latches " in the present embodiment and " full car vehicle window is closed " enters as driving engine the necessary condition that N keeps off flameout state; When systems axiol-ogy does not latch to car door, system sends instruction makes car door automatically latch, and ensures that full car car door is in the state of latching.When systems axiol-ogy is not closed to vehicle window, system sends instruction makes vehicle window automatically close, and ensures that full car vehicle window is in closed condition.
Note: " threshold value " in the present invention refers to the preset limit value that each class variable presets.
Claims (8)
1. automobile N keeps off the control method of start stop system, comprises CAN, is connected to Engine ECU in CAN and automatic transmission with hydraulic torque converter TCU, it is characterized in that by wire harness,
One, after key switch ignition start driving engine, when meeting the following conditions simultaneously:
A: the speed of a motor vehicle is less than threshold value Vf, or the speed of a motor vehicle is zero;
A1: engine speed is greater than threshold value Fs1;
B: vehicle is in braking mode;
B1: brake system power-assisted degree of vacuum is greater than threshold value Zf;
C: battery tension is greater than threshold value Uf;
D: the gear of change-speed box is in N gear, and the residence time that gear keeps off at N exceedes threshold value Tf; Then driving engine enters N by running state and keeps off flameout state;
Two, after key switch ignition start driving engine, and meet the following conditions:
A: vehicle is in braking mode;
B: the speed of a motor vehicle is less than threshold value Vf;
C: engine speed is less than threshold value Fs1;
D: gear is kept off by N and entering " D " keep off or " R " gear, or manual " S1 " gear in auto-manual; Then system sends " starting order " until make driving engine reenter starting state to driving engine, starter;
Described threshold value Tf can be set by any one mode following:
Mode one: be provided with initial value tc and actual acquisition value ts in system;
Initial value tc is set between 0.1 second to 1 second;
The method to set up of actual acquisition value ts is as follows:
First, gather driving engine to be each time in N and to keep off after flameout state gear and kept off hanging to D by N and keep off time t1 used, until collect n1 t1 value; Then calculate the aviation value of n1 t1 value, and this aviation value is set as actual acquisition value ts;
First stage: before the setting that system does not complete actual acquisition value ts, threshold value Tf value is initial value tc;
Subordinate phase: when after the setting that system completes for the first time to actual acquisition value ts, whether system will provide prompting and " adopt measured value to arrange Tf "; If "Yes", threshold value Tf will be set to actual acquisition value ts; If "No", threshold value Tf will continue to use original setting value;
Phase III: system resets actual acquisition value ts, namely system restarts to gather after driving engine is each time in N gear flameout state and keeps off extension to D gear time t1 used, until collect n1 t1 value by N; Then, recalculate the aviation value of n1 t1 value, and this aviation value is set to new actual acquisition value ts;
After system obtains new actual acquisition value ts, whether system again will provide prompting and " adopt measured value to arrange Tf ", if "Yes", threshold value Tf will be set to new actual acquisition value ts; If "No", threshold value Tf will continue to use original setting value;
Fourth stage: return the phase III, circulates with this;
Mode two: be provided with initial value tc in system, discriminant value tp and final value tz; Described automatic transmission with hydraulic torque converter TCU is provided with time acquisition module;
Initial value tc is between 0.3 second to 0.6 second;
The establishing method of discriminant value tp is as follows:
First, keep off to D the time t2 experienced for each time by R gear by front m is individual in the actual process of putting into gear of time acquisition module collection chaufeur; And front m is kept off to R the time t3 experienced for each time by D gear;
Then, retain t2 and the t3 value being less than 1 second, and select the numerical value closest to 1 second wherein, this numerical value is discriminant value tp;
The establishing method of described final value tz is as follows:
When discriminant value tp is more than or equal to 0.3 second, final value tz is set as identical with discriminant value tp; When discriminant value tp is less than 0.3 second, final value tz is set as 0.3 second;
When system does not complete the setting to discriminant value tp, threshold value Tf value is initial value tc;
Complete after to discriminant value tp and final value tz setting in system, threshold value Tf value is final value tz.
2. a kind of automobile N according to claim 1 keeps off the control method of start stop system, it is characterized in that, when driving engine be in N keep off flameout state time, the power of Der Scheinwerfer mit FernlichtAbblendlichtStandlicht by between 30% to 50% of headlight power when being reduced to engine operating state or downshift run.
3. a kind of automobile N according to claim 1 keeps off the control method of start stop system, it is characterized in that: keep off flameout state when driving engine is in N, then start the braking function in electronic parking or ABS system immediately;
Being in N at driving engine keeps off in the process of flameout state, when two sudden strain of a muscle button is pressed, then removes the braking function of braking function in ABS system or electronic parking immediately;
When driving engine reenters starting state by N gear flameout state, then remove the braking function in electronic parking or ABS system immediately.
4. automobile N keeps off the control method of start stop system, comprises CAN, is connected to Engine ECU in CAN and automatic transmission with hydraulic torque converter TCU, it is characterized in that, after key switch ignition start driving engine by wire harness; When meeting the following conditions simultaneously:
A: the speed of a motor vehicle is less than threshold value Vf, or the speed of a motor vehicle is zero;
A1: engine speed is greater than threshold value Fs1;
B: vehicle is in braking mode;
B1: brake system power-assisted degree of vacuum is greater than threshold value Zf;
C: battery tension is greater than threshold value Uf;
D: the gear of change-speed box is in N gear, and the residence time that gear keeps off at N exceedes threshold value Tf; Then driving engine enters N by running state and keeps off flameout state;
Keep off flameout state when driving engine is in N, and meet the following conditions:
E: vehicle is in braking mode;
F: driving engine is in flameout state, and engine speed is less than threshold value Fs1;
G: the speed of a motor vehicle is less than threshold value Vf;
H: gear is in " D " keeps off or " R " gear, or manual " S1 " gear in auto-manual; Then driving engine reenters starting state;
Described threshold value Tf can be set by any one mode following:
Mode one: be provided with initial value tc and actual acquisition value ts in system;
Initial value tc is set between 0.1 second to 1 second;
The method to set up of actual acquisition value ts is as follows:
First, gather driving engine to be each time in N and to keep off after flameout state gear and kept off hanging to D by N and keep off time t1 used, until collect n1 t1 value; Then calculate the aviation value of n1 t1 value, and this aviation value is set as actual acquisition value ts;
First stage: before the setting that system does not complete actual acquisition value ts, threshold value Tf value is initial value tc;
Subordinate phase: when after the setting that system completes for the first time to actual acquisition value ts, whether system will provide prompting and " adopt measured value to arrange Tf "; If "Yes", threshold value Tf will be set to actual acquisition value ts; If "No", threshold value Tf will continue to use original setting value;
Phase III: system resets actual acquisition value ts, namely system restarts to gather after driving engine is each time in N gear flameout state and keeps off extension to D gear time t1 used, until collect n1 t1 value by N; Then, recalculate the aviation value of n1 t1 value, and this aviation value is set to new actual acquisition value ts;
After system obtains new actual acquisition value ts, whether system again will provide prompting and " adopt measured value to arrange Tf ", if "Yes", threshold value Tf will be set to new actual acquisition value ts; If "No", threshold value Tf will continue to use original setting value;
Fourth stage: return the phase III, circulates with this;
Mode two: be provided with initial value tc in system, discriminant value tp and final value tz; Described automatic transmission with hydraulic torque converter TCU is provided with time acquisition module;
Initial value tc is between 0.3 second to 0.6 second;
The establishing method of discriminant value tp is as follows:
First, keep off to D the time t2 experienced for each time by R gear by front m is individual in the actual process of putting into gear of time acquisition module collection chaufeur; And front m is kept off to R the time t3 experienced for each time by D gear;
Then, retain t2 and the t3 value being less than 1 second, and select the numerical value closest to 1 second wherein, this numerical value is discriminant value tp;
The establishing method of described final value tz is as follows:
When discriminant value tp is more than or equal to 0.3 second, final value tz is set as identical with discriminant value tp; When discriminant value tp is less than 0.3 second, final value tz is set as 0.3 second;
When system does not complete the setting to discriminant value tp, threshold value Tf value is initial value tc;
Complete after to discriminant value tp and final value tz setting in system, threshold value Tf value is final value tz.
5. a kind of automobile N according to claim 4 keeps off the control method of start stop system, it is characterized in that: keep off flameout state when driving engine is in N, then start the braking function in electronic parking or ABS system immediately;
Being in N at driving engine keeps off in the process of flameout state, when two sudden strain of a muscle button is pressed, then removes the braking function of braking function in ABS system or electronic parking immediately;
When driving engine reenters starting state by N gear flameout state, then remove the braking function in electronic parking or ABS system immediately;
When driving engine be in N keep off flameout state time, the power of Der Scheinwerfer mit FernlichtAbblendlichtStandlicht by between 30% to 50% of headlight power when being reduced to engine operating state or downshift run.
6. automobile N keeps off the control method of start stop system, comprises CAN, is connected to Engine ECU in CAN and automatic transmission with hydraulic torque converter TCU, it is characterized in that by wire harness,
One, after key switch ignition start driving engine; When meeting the following conditions simultaneously:
A: the speed of a motor vehicle is less than threshold value Vf, or the speed of a motor vehicle is zero;
A1: engine speed is greater than threshold value Fs1;
B: vehicle is in braking mode;
B1: brake system power-assisted degree of vacuum is greater than threshold value Zf;
C: battery tension is greater than threshold value Uf;
D: Engine Coolant Temperature is higher than threshold value Ff;
D1: gearbox oil temperature is higher than threshold value Bf;
E: the gear of change-speed box is in N gear, and the residence time that gear keeps off at N exceedes threshold value Tf; Then driving engine enters N by running state and keeps off flameout state;
Two, after key switch ignition start driving engine, when meeting the following conditions simultaneously:
A: vehicle is in braking mode;
B: driving engine is in flameout state, and engine speed is less than threshold value Fs1;
C: the speed of a motor vehicle is less than threshold value Vf;
D: car door is in closed condition;
E: gear is in " D " keeps off or " R " gear, or manual " S1 " gear in auto-manual;
Then system sends " starting order " until make driving engine reenter starting state to driving engine, starter;
Described threshold value Tf can be set by any one mode following:
Mode one: be provided with initial value tc and actual acquisition value ts in system;
Initial value tc is set between 0.1 second to 1 second;
The method to set up of actual acquisition value ts is as follows:
First, gather driving engine to be each time in N and to keep off after flameout state gear and kept off hanging to D by N and keep off time t1 used, until collect n1 t1 value; Then calculate the aviation value of n1 t1 value, and this aviation value is set as actual acquisition value ts;
First stage: before the setting that system does not complete actual acquisition value ts, threshold value Tf value is initial value tc;
Subordinate phase: when after the setting that system completes for the first time to actual acquisition value ts, whether system will provide prompting and " adopt measured value to arrange Tf "; If "Yes", threshold value Tf will be set to actual acquisition value ts; If "No", threshold value Tf will continue to use original setting value;
Phase III: system resets actual acquisition value ts, namely system restarts to gather after driving engine is each time in N gear flameout state and keeps off extension to D gear time t1 used, until collect n1 t1 value by N; Then, recalculate the aviation value of n1 t1 value, and this aviation value is set to new actual acquisition value ts;
After system obtains new actual acquisition value ts, whether system again will provide prompting and " adopt measured value to arrange Tf ", if "Yes", threshold value Tf will be set to new actual acquisition value ts; If "No", threshold value Tf will continue to use original setting value;
Fourth stage: return the phase III, circulates with this;
Mode two: be provided with initial value tc in system, discriminant value tp and final value tz; Described automatic transmission with hydraulic torque converter TCU is provided with time acquisition module;
Initial value tc is between 0.3 second to 0.6 second;
The establishing method of discriminant value tp is as follows:
First, keep off to D the time t2 experienced for each time by R gear by front m is individual in the actual process of putting into gear of time acquisition module collection chaufeur; And front m is kept off to R the time t3 experienced for each time by D gear;
Then, retain t2 and the t3 value being less than 1 second, and select the numerical value closest to 1 second wherein, this numerical value is discriminant value tp;
The establishing method of described final value tz is as follows:
When discriminant value tp is more than or equal to 0.3 second, final value tz is set as identical with discriminant value tp; When discriminant value tp is less than 0.3 second, final value tz is set as 0.3 second;
When system does not complete the setting to discriminant value tp, threshold value Tf value is initial value tc;
Complete after to discriminant value tp and final value tz setting in system, threshold value Tf value is final value tz.
7. a kind of automobile N according to claim 6 keeps off the control method of start stop system, it is characterized in that, keeps off flameout state when driving engine is in N, then start the braking function in electronic parking or ABS system immediately;
Being in N at driving engine keeps off in the process of flameout state, when two sudden strain of a muscle button is pressed, then removes the braking function of braking function in ABS system or electronic parking immediately;
When driving engine reenters starting state by N gear flameout state, then remove the braking function in electronic parking or ABS system immediately;
When driving engine be in N keep off flameout state time, the power of Der Scheinwerfer mit FernlichtAbblendlichtStandlicht by between 30% to 50% of headlight power when being reduced to engine operating state or downshift run.
8. automobile N keeps off the control method of start stop system, comprises CAN, is connected to Engine ECU in CAN and automatic transmission with hydraulic torque converter TCU, it is characterized in that by wire harness,
One, after key switch ignition start driving engine, when meeting the following conditions simultaneously:
A: the speed of a motor vehicle is less than threshold value Vf, or the speed of a motor vehicle is zero;
B: vehicle is in braking mode;
B1: brake system power-assisted degree of vacuum is greater than threshold value Zf;
C: the gear of change-speed box is in N gear, and the residence time that gear keeps off at N exceedes threshold value Tf; Then driving engine enters N by running state and keeps off flameout state;
Two, after key switch ignition start driving engine, when meeting the following conditions simultaneously:
A: vehicle is in braking mode;
B: driving engine is in flameout state, and engine speed is less than threshold value Fs1;
C: the speed of a motor vehicle is less than threshold value Vf;
D: gear is in " D " keeps off or " R " gear, or manual " S1 " gear in auto-manual; Then system sends " starting order " until make driving engine reenter starting state to driving engine, starter;
Described threshold value Tf can be set by any one mode following:
Mode one: be provided with initial value tc and actual acquisition value ts in system;
Initial value tc is set between 0.1 second to 1 second;
The method to set up of actual acquisition value ts is as follows:
First, gather driving engine to be each time in N and to keep off after flameout state gear and kept off hanging to D by N and keep off time t1 used, until collect n1 t1 value; Then calculate the aviation value of n1 t1 value, and this aviation value is set as actual acquisition value ts;
First stage: before the setting that system does not complete actual acquisition value ts, threshold value Tf value is initial value tc;
Subordinate phase: when after the setting that system completes for the first time to actual acquisition value ts, whether system will provide prompting and " adopt measured value to arrange Tf "; If "Yes", threshold value Tf will be set to actual acquisition value ts; If "No", threshold value Tf will continue to use original setting value;
Phase III: system resets actual acquisition value ts, namely system restarts to gather after driving engine is each time in N gear flameout state and keeps off extension to D gear time t1 used, until collect n1 t1 value by N; Then, recalculate the aviation value of n1 t1 value, and this aviation value is set to new actual acquisition value ts;
After system obtains new actual acquisition value ts, whether system again will provide prompting and " adopt measured value to arrange Tf ", if "Yes", threshold value Tf will be set to new actual acquisition value ts; If "No", threshold value Tf will continue to use original setting value;
Fourth stage: return the phase III, circulates with this;
Mode two: be provided with initial value tc in system, discriminant value tp and final value tz; Described automatic transmission with hydraulic torque converter TCU is provided with time acquisition module;
Initial value tc is between 0.3 second to 0.6 second;
The establishing method of discriminant value tp is as follows:
First, keep off to D the time t2 experienced for each time by R gear by front m is individual in the actual process of putting into gear of time acquisition module collection chaufeur; And front m is kept off to R the time t3 experienced for each time by D gear;
Then, retain t2 and the t3 value being less than 1 second, and select the numerical value closest to 1 second wherein, this numerical value is discriminant value tp;
The establishing method of described final value tz is as follows:
When discriminant value tp is more than or equal to 0.3 second, final value tz is set as identical with discriminant value tp; When discriminant value tp is less than 0.3 second, final value tz is set as 0.3 second;
When system does not complete the setting to discriminant value tp, threshold value Tf value is initial value tc;
Complete after to discriminant value tp and final value tz setting in system, threshold value Tf value is final value tz.
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| CN101994586A (en) * | 2010-09-29 | 2011-03-30 | 重庆长安汽车股份有限公司 | Idling start-stop control system for automobile engine |
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