CN104653766A - Method and system for controlling shifting in vehicle corner - Google Patents
Method and system for controlling shifting in vehicle corner Download PDFInfo
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- CN104653766A CN104653766A CN201510126274.XA CN201510126274A CN104653766A CN 104653766 A CN104653766 A CN 104653766A CN 201510126274 A CN201510126274 A CN 201510126274A CN 104653766 A CN104653766 A CN 104653766A
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/16—Inhibiting or initiating shift during unfavourable conditions, e.g. preventing forward reverse shift at high vehicle speed, preventing engine over speed
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H59/00—Control inputs to control units of change-speed-, or reversing-gearings for conveying rotary motion
- F16H59/50—Inputs being a function of the status of the machine, e.g. position of doors or safety belts
- F16H59/58—Inputs being a function of the status of the machine, e.g. position of doors or safety belts dependent on signals from the steering
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/16—Inhibiting or initiating shift during unfavourable conditions, e.g. preventing forward reverse shift at high vehicle speed, preventing engine over speed
- F16H2061/163—Holding the gear for delaying gear shifts under unfavorable conditions, e.g. during cornering
Abstract
The invention discloses a method and a system for controlling shifting in a vehicle corner and belongs to the field of shift control of an automobile gearbox. The method comprises the following steps: obtaining a left turn light signal, a right turn light signal, a steering wheel turn angle signal, a left front wheel rotating speed signal, a right front rotating speed signal, a left rear wheel rotating speed signal and a right rear wheel rotating speed signal by analysis of a CAN signal; performing comprehensive logic judgment to obtain any condition of corner entering picture of the vehicle, a corner process, a corner exiting process or linear running state; and selectively pre-shielding an upshift signal of a shifting MAP picture to improve the power performance and the running safety of the vehicle. By adopting the method and the system disclosed by the invention, the vehicle can pass through the corner rapidly when exits the corner; when in a condition that the road has a plurality of corners, over-fast heating of a clutch is prevented, so that the power performance, the safety and the driving experience of the vehicle are further improved.
Description
Technical field
The present invention relates to be a kind of automatic gearbox gearshift control field technology, be specifically related to the shift control method of a kind of automobile loading double-clutch automatic gearbox under bend operating mode and system, when pilot control vehicle is turned, automatic transmission will forbid upshift.
Background technique
Double-clutch automatic gearbox (Double Clutch Transmission) increases a clutch on the basis of AMT, two clutches corresponding odd even gear respectively.In shift process, target gear can be put into gear in advance, then realizes unpowered shock-free gearshift by the mutual of two clutches and engine torque and rotating speed shift control.From cost, DCT higher than AMT and MT, but lower than AT and steel-belt type CVT; Transmission efficiency, DCT inherits the high efficiency of MT and AMT; From shift quality, DCT can realize without impacting the gearshift with power failure-free.All in all, DCT have that transmission efficiency is high, moderate cost and the good advantage of shift quality.In addition, the control technique of DCT can continue and development from the AMT control technique of maturation, is the automatic transmission of a applicable China's national situation.
In the process entering bend, according to general driving habits, driver understands accelerator releasing, touches on the brake, make the speed of a motor vehicle decline in case safety pass through bend.But in the process of vehicle deceleration, if carry out upshift according to gearshift MAP, go out will inevitably cause in curved process the situation of power character deficiency at vehicle.In addition, when the road of many bends travels, be elevated gear operation frequently and clutch heating can be made too fast, the Security that impact is driven.
Through finding the retrieval of prior art, Chinese patent literature CN103939599A, open (bulletin) day 2014.07.23, discloses a kind of automatic transmission shift control method, Apparatus and system, relate to technical field of automobile control, for solving the problem of the Safety performance of automobile.Described automatic transmission shift control method comprises: obtain the speed discrepancy between speed discrepancy between two front wheels and two rear wheels according to the rotating speed of two front wheels obtained and the rotating speed of two rear wheels, when speed discrepancy between two front wheels and the speed discrepancy between two rear wheels are greater than corresponding setting value respectively, export vehicle and true signal for turn occurs; Calculate and obtain car load speed discrepancy and car load turning rate, obtain the car load speed of a motor vehicle and car load turning endurance; When the car load speed of a motor vehicle, car load turning endurance and car load turning rate are greater than corresponding setting value respectively, export the control information forbidding speed changer upshift, speed changer is entered and forbids upshift pattern.
But the insurmountable technical problem of this technology comprises:
1) cannot anticipation driver enter curved intention, this will cause before wheel speed difference appears in vehicle wheel speed, and automatic transmission has just completed upshift operation.
2) existing technical limit spacing to speed discrepancy relevant to the size of the speed of a motor vehicle, when determining to make speed changer forbid the wheel speed difference limen value of upshift information, obtain necessarily about a series of interpolation of the speed of a motor vehicle.Can cause at each speed of a motor vehicle point like this, staking-out work personnel will mark a corresponding wheel speed difference limen value accordingly; And speed of a motor vehicle point selection is more, the control precision of threshold value will be higher, speed of a motor vehicle point selection fewer, and the control accuracy of threshold value will be lower.
Japanese documentation JP2004116752A, open (bulletin) day 2004.4.15, discloses a kind of automatic transmission shift control method, Apparatus and system, relates to technical field of automobile control.Described automatic transmission shift control method comprises: the wheel speed collecting wheel four wheels, calculates average wheel speed, and by the difference of trailing wheel wheel speed and average wheel speed as the controlled conditions of forbidding upshift.Utilization orientation dish angular signal calculates the speed discrepancy threshold value of forbidding upshift.When the difference of trailing wheel wheel speed and average wheel speed is greater than threshold value, obtain forbidding upshift signal.But the moment that can start to turn than vehicle due to the moment of rear wheel wheel speed generation difference is late, in addition vehicle starts moment of turning has delay mechanically than the moment that steering wheel starts action, therefore this technical controlling mode has certain hysteresis quality, namely before speed discrepancy appears in wheel, just can not be judged to vehicle in advance and be about to turn.Existing controlling method after vehicle upshift, just may can play its control action.
Summary of the invention
The present invention is directed to prior art above shortcomings, propose a kind of shift control method and system of vehicle bend, make vehicle (before the appearance of wheel speed difference) before entering bend, just can forbid that automatic transmission upshifts; After vehicle enters bend (difference appears in wheel), automatic transmission is the need of forbidding upshift to utilize the threshold value of three turning radius just can judge; Negotiation of bends operating mode and straight-line travelling operating mode can be distinguished.The present invention is achieved by the following technical solutions:
The present invention relates to a kind of shift control method of vehicle bend, by gather a pair turn light signal, steering wheel angle signal, a pair front-wheel wheel speed signal and pair of rear wheels wheel speed signal and integrated logic judge to draw vehicle by entering curved intention, bend process, go out in curved process or straight-line travelling arbitrary operating mode after, in advance selectively masking is carried out to the upshift signal of gearshift MAP, realize the lifting to power performance and driving safety.
Described collection refers to: obtain left direction modulating signal, right direction modulating signal, steering wheel angle signal, the near front wheel wheel speed signal, off-front wheel wheel speed signal, left rear wheel wheel speed signal and off hind wheel wheel speed signal by resolving in CAN signal.
Described Logic judgment refers to:
1) under straight travel state, when meeting the condition into curved intention operating mode, then enter into curved intention operating mode;
1.1) entering under curved intention operating mode, when meeting the condition curved process operating mode, then straight-line travelling operating mode is entered;
1.2) entering under curved intention operating mode, when meeting the condition of bend process operating mode, then bend process operating mode is entered;
1.2.1) under bend process operating mode, when meeting the condition curved process operating mode, then curved process operating mode is entered out;
1.2.1.1) going out under curved process operating mode, when meeting the condition of straight travel state, then straight-line travelling operating mode is entered;
1.2.1.2) going out under curved process operating mode, when meeting the condition of bend process operating mode, then bend process operating mode is entered.
The described condition entering curved intention operating mode, refers to and meets one of following two conditions:
A) within the judgement cycle, when turn light signal is high level and front-wheel wheel speed variance ratio is greater than bend wheel speed variance ratio threshold value;
B) within the judgement cycle, when steering wheel angle signal is greater than steering wheel angle threshold value and front-wheel wheel speed variance ratio is greater than bend wheel speed variance ratio threshold value.
The condition of described bend process operating mode refers to: within the judgement cycle, when the radius of turn of the vehicle obtained by trailing wheel wheel speed calculated signals is less than curved inside radius threshold value, is judged as operating mode in bend process;
The radius of turn of described vehicle calculates in the following manner:
wherein: R is radius of turn, V is current vehicle speed, V
lfor rear left wheel wheel speed, V
rfor right rear wheel wheel speed, L is left and right wheels wheelspan.
The described condition going out curved process operating mode refers to: within the judgement cycle, when the radius of turn of the vehicle obtained by trailing wheel wheel speed calculated signals is greater than curved radius threshold, is judged as out operating mode in curved process.
Described straight travel state refers to: within the judgement cycle, when the radius of turn of the vehicle obtained by trailing wheel wheel speed calculated signals is greater than straight-line travelling threshold value and front-wheel wheel speed variance ratio is greater than straight line wheel speed variance ratio threshold value, is judged as straight-line travelling operating mode.
Described shielding refers to: do not export the upshift signal produced by gearshift MAP.
Described selectivity refers to: when judging operating mode for entering curved intention, shielding upshift signal; When judging that operating mode is in bend process, shielding upshift signal; When judging operating mode for going out in curved process, do not shield upshift signal; When judging that operating mode is normal driving, do not shield upshift signal.
The present invention relates to a kind of system realizing said method, comprise: radius of turn computing module, front-wheel wheel speed variance ratio computing module, enter curved intention condition judgment module, bend process condition judge module, go out curved process condition judge module, straight-line travelling condition judgment module and forbid upshift condition judgment module, wherein: radius of turn computing module respectively with bend procedure module, go out curved procedure module, straight-line travelling module is connected and transmits radius of turn information; Front-wheel wheel speed variance ratio computing module respectively with enter curved intention condition judgment module, straight-line travelling condition judgment module is connected and transmits front-wheel wheel speed rate of change information; Enter curved intention condition judgment module, bend process condition judge module, go out curved process condition judge module, straight-line travelling condition judgment module and forbid that upshift condition judgment module is connected and transmission state transitional information; Forbid that upshift condition judgment module is connected with external system and transmits and forbid upshift information.
Technique effect
Compared with prior art, trailing wheel wheel speed signal can be converted into and trailing wheel wheel speed difference and the closely-related radius of turn of current vehicle speed by the present invention; Can judge into curved intention according to turn light and steering wheel angle signal; Bend process can be distinguished according to radius of turn, go out curved process; Can straight-line travelling operating mode be distinguished according to radius of turn and front-wheel wheel speed variance ratio and go out curved operating mode; The judgement entering curved intention operating mode forgotten and close turn light and cause can be ignored according to front-wheel wheel speed variance ratio.
Accompanying drawing explanation
Fig. 1 is principle of the invention schematic diagram;
Fig. 2 is the inventive method schematic flow sheet;
Fig. 3 is embodiment 1 schematic flow sheet;
Fig. 4 is embodiment 1 signal timing diagram;
Fig. 5 is embodiment 1 radius of turn signal timing diagram;
Fig. 6 is that embodiment 1 enters curved judgement sequential chart.
Embodiment
Elaborate to embodiments of the invention below, the present embodiment is implemented under premised on technical solution of the present invention, give detailed mode of execution and concrete operating process, but protection scope of the present invention is not limited to following embodiment.
Embodiment 1
The steering wheel angle signal that the present embodiment gathers according to real vehicle and front and back wheels wheel speed signal, SIMULINK simulated environment.Based on above-mentioned environment, as shown in Figures 2 and 3, the present embodiment comprises the following steps:
1, the judgement of curved intention is entered
Because everyone driving habits is different, for ensureing general driving situation, the present invention does not adopt turn light, and adopts steering wheel angle and front-wheel wheel speed to carry out judging into curved intention.In 0.1 second, when having turn light signal and front-wheel wheel speed variance ratio is greater than 3, shielding upshift signal; Within 0.1 second a period of time, when steering wheel angle is greater than 35 and the fluctuation of front-wheel wheel speed is greater than 3, shielding upshift signal.
2, the judgement of bend process
Vehicle is when bend process, and the trailing wheel left and right speed of a motor vehicle is inevitable different, is calculated the radius of turn of vehicle by wheel speed difference.Within 0.03 second a period of time, when radius of turn is less than 80, judge that vehicle is in bend process, shielding upshift signal.
3, the judgement of curved process is gone out
Within a period of time 0.3 second, when radius of turn is greater than 85, judges that vehicle is in out curved process, do not shield upshift signal.
4, the judgement of normal driving
Within 0.03 second a period of time, when radius of turn is greater than 100 and front-wheel wheel speed variance ratio is less than 2, judges that vehicle is in normal driving process, do not shield upshift signal.
Compared with prior art, the performance index of the present embodiment, technique effect imbody are as figure below:
As shown in Figure 4, in figure, Figure 1 is vehicle front-wheel wheel speed; Figure 2 is vehicle rear wheel wheel speed; Figure 3 is steering wheel angle; Figure 4 is for forbidding upshift signal.As can be seen from Figure, before vehicle front and back wheels produces wheel speed difference, forbid that upshift signal is enable, show that the present invention has bend anticipation function; Curved intention can be entered with steering wheel angle signal anticipation.
As shown in Figure 6, Curves Case=0 in figure, shows that vehicle is in straight-line travelling; Curves Case=1, shows that vehicle is in into curved intention; Curves Case=2, shows that vehicle is in bend process; Curves Case=3, shows that vehicle is in out curved process.Fig. 5 and Fig. 6 shows, this method can be distinguished bend process according to radius of turn, go out curved process; Can straight-line travelling operating mode be distinguished according to radius of turn and front-wheel wheel speed variance ratio and go out curved operating mode.
Claims (10)
1. the shift control method of a vehicle bend, it is characterized in that, by gather a pair turn light signal, steering wheel angle signal, a pair front-wheel wheel speed signal and pair of rear wheels wheel speed signal and integrated logic judge to draw vehicle by entering curved intention, bend process, go out in curved process or straight travel state arbitrary operating mode after, in advance selectively masking is carried out to the upshift signal of gearshift MAP, realize the lifting to power performance and driving safety;
Described collection refers to: obtain left direction modulating signal, right direction modulating signal, steering wheel angle signal, the near front wheel wheel speed signal, off-front wheel wheel speed signal, left rear wheel wheel speed signal and off hind wheel wheel speed signal by resolving in CAN signal.
2. the shift control method of vehicle bend according to claim 1, is characterized in that, described Logic judgment refers to:
1) under straight travel state, when meeting the condition into curved intention operating mode, then enter into curved intention operating mode;
1.1) entering under curved intention operating mode, when meeting the condition curved process operating mode, then straight-line travelling operating mode is entered;
1.2) entering under curved intention operating mode, when meeting the condition of bend process operating mode, then bend process operating mode is entered;
1.2.1) under bend process operating mode, when meeting the condition curved process operating mode, then curved process operating mode is entered out;
1.2.1.1) going out under curved process operating mode, when meeting the condition of straight travel state, then straight-line travelling operating mode is entered;
1.2.1.2) going out under curved process operating mode, when meeting the condition of bend process operating mode, then bend process operating mode is entered.
3. the shift control method of vehicle bend according to claim 1 and 2, is characterized in that, the described condition entering curved intention operating mode refers to: meet one of following two conditions
A) within the judgement cycle, when turn light signal is high level and front-wheel wheel speed variance ratio is greater than bend wheel speed variance ratio threshold value;
B) within the judgement cycle, when steering wheel angle signal is greater than steering wheel angle threshold value and front-wheel wheel speed variance ratio is greater than bend wheel speed variance ratio threshold value.
4. the shift control method of vehicle bend according to claim 1 and 2, it is characterized in that, the condition of described bend process operating mode refers to: within the judgement cycle, when the radius of turn of the vehicle obtained by trailing wheel wheel speed calculated signals is less than curved inside radius threshold value, be judged as operating mode in bend process.
5. the shift control method of vehicle bend according to claim 1 and 2, it is characterized in that, the described condition going out curved process operating mode refers to: within the judgement cycle, when the radius of turn of the vehicle obtained by trailing wheel wheel speed calculated signals is greater than curved radius threshold, be judged as out operating mode in curved process.
6. the shift control method of vehicle bend according to claim 1 and 2, it is characterized in that, described straight travel state refers to: within the judgement cycle, when the radius of turn of the vehicle obtained by trailing wheel wheel speed calculated signals is greater than straight-line travelling threshold value and front-wheel wheel speed variance ratio is less than straight line wheel speed variance ratio threshold value, be judged as straight-line travelling operating mode.
7. the shift control method of the vehicle bend according to claim 4 or 5 or 6, it is characterized in that, the radius of turn of described vehicle calculates in the following manner:
wherein: R is radius of turn, V is current vehicle speed, V
lfor rear left wheel wheel speed, V
rfor right rear wheel wheel speed, L is left and right wheels wheelspan.
8. the shift control method of vehicle bend according to claim 1, is characterized in that, described shielding refers to: do not export the upshift signal produced by gearshift MAP.
9. the shift control method of vehicle bend according to claim 1, is characterized in that, described selectivity refers to: when judging operating mode for entering curved intention, shielding upshift signal; When judging that operating mode is in bend process, shielding upshift signal; When judging operating mode for going out in curved process, do not shield upshift signal; When judging that operating mode is normal driving, do not shield upshift signal.
10. one kind realizes the system of method described in above-mentioned arbitrary claim, it is characterized in that, comprise: radius of turn computing module, front-wheel wheel speed variance ratio computing module, enter curved intention condition judgment module, bend process condition judge module, go out curved process condition judge module, straight-line travelling condition judgment module and forbid upshift condition judgment module, wherein: radius of turn computing module respectively with bend procedure module, go out curved procedure module, straight-line travelling module is connected and transmits radius of turn information; Front-wheel wheel speed variance ratio computing module respectively with enter curved intention condition judgment module, straight-line travelling condition judgment module is connected and transmits front-wheel wheel speed rate of change information; Enter curved intention condition judgment module, bend process condition judge module, go out curved process condition judge module, straight-line travelling condition judgment module and forbid that upshift condition judgment module is connected and transmission state transitional information; Forbid that upshift condition judgment module is connected with external system and transmits and forbid upshift information.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510126274.XA CN104653766B (en) | 2015-03-23 | 2015-03-23 | The shift control method of vehicle bend and system |
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| CN201510126274.XA CN104653766B (en) | 2015-03-23 | 2015-03-23 | The shift control method of vehicle bend and system |
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| CN104653766B CN104653766B (en) | 2017-01-04 |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105179675A (en) * | 2015-08-11 | 2015-12-23 | 上海汽车变速器有限公司 | Optimized upshifting control method for wet type double-clutch transmission |
| CN109058450A (en) * | 2018-09-12 | 2018-12-21 | 汽解放汽车有限公司 | A kind of identification of commercial vehicle automatic speed changer for machine bend and its shift control method |
| CN109532714A (en) * | 2017-09-21 | 2019-03-29 | 比亚迪股份有限公司 | Obtain the method and system and vehicle of vehicle base map picture |
| CN110356252A (en) * | 2019-08-07 | 2019-10-22 | 奇瑞新能源汽车股份有限公司 | Traffic control method, device and computer readable storage medium |
| CN112229418A (en) * | 2020-12-11 | 2021-01-15 | 北京晶众智慧交通科技股份有限公司 | Vehicle positioning system based on OBD box |
| CN113619584A (en) * | 2021-08-27 | 2021-11-09 | 中国第一汽车股份有限公司 | Electric control rear wheel steering method and device, electronic equipment and storage medium |
| CN113700850A (en) * | 2021-09-29 | 2021-11-26 | 宜宾凯翼汽车有限公司 | Gear control method of vehicle automatic transmission control unit |
| CN114135659A (en) * | 2021-11-30 | 2022-03-04 | 东风商用车有限公司 | Heavy truck AMT curve gear selection method, device, equipment and storage medium |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105179675A (en) * | 2015-08-11 | 2015-12-23 | 上海汽车变速器有限公司 | Optimized upshifting control method for wet type double-clutch transmission |
| CN109532714A (en) * | 2017-09-21 | 2019-03-29 | 比亚迪股份有限公司 | Obtain the method and system and vehicle of vehicle base map picture |
| CN109058450A (en) * | 2018-09-12 | 2018-12-21 | 汽解放汽车有限公司 | A kind of identification of commercial vehicle automatic speed changer for machine bend and its shift control method |
| CN109058450B (en) * | 2018-09-12 | 2020-02-18 | 一汽解放汽车有限公司 | Bend identification and gear shifting control method for mechanical automatic transmission of commercial vehicle |
| CN110356252A (en) * | 2019-08-07 | 2019-10-22 | 奇瑞新能源汽车股份有限公司 | Traffic control method, device and computer readable storage medium |
| CN110356252B (en) * | 2019-08-07 | 2022-04-12 | 奇瑞新能源汽车股份有限公司 | Driving control method and device and computer readable storage medium |
| CN112229418A (en) * | 2020-12-11 | 2021-01-15 | 北京晶众智慧交通科技股份有限公司 | Vehicle positioning system based on OBD box |
| CN113619584A (en) * | 2021-08-27 | 2021-11-09 | 中国第一汽车股份有限公司 | Electric control rear wheel steering method and device, electronic equipment and storage medium |
| WO2023024879A1 (en) * | 2021-08-27 | 2023-03-02 | 中国第一汽车股份有限公司 | Electric control rear wheel steering method and apparatus, electronic device, and storage medium |
| CN113700850A (en) * | 2021-09-29 | 2021-11-26 | 宜宾凯翼汽车有限公司 | Gear control method of vehicle automatic transmission control unit |
| CN114135659A (en) * | 2021-11-30 | 2022-03-04 | 东风商用车有限公司 | Heavy truck AMT curve gear selection method, device, equipment and storage medium |
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