CN102887142B - Accidental shifting control method for automatic transmission automobile - Google Patents
Accidental shifting control method for automatic transmission automobile Download PDFInfo
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- CN102887142B CN102887142B CN201210398241.7A CN201210398241A CN102887142B CN 102887142 B CN102887142 B CN 102887142B CN 201210398241 A CN201210398241 A CN 201210398241A CN 102887142 B CN102887142 B CN 102887142B
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Abstract
The invention discloses an accidental shifting control method for an automatic transmission automobile, which comprises the steps of: establishing a dynamic local coordinates system based on a shifting rule formulated and automobile speed and accelerator openness as horizontal and vertical coordinates on a shifting rule curve drawing according to an inner link of a steering state of an automobile and shifting control parameters; when theta changes along a first quadrant of the coordinates system, processing theta as a normal shift raising process; when theta changes along a third quadrant of the coordinates system, processing theta as a normal shift decreasing process; when theta changes along a fourth quadrant of the coordinates system, processing theta as an accident shift raising process; and when theta changes along a second quadrant of the coordinates system, firstly judging whether driving purpose is sudden acceleration according to the change rate of the accelerator openness; if so, processing normal shift decrease; or, processing accidental shift decrease. The invention has the advantages that normal or accident shift change can be identified by judging the changing orbit of the dynamic coordinate system established along a coordinate point consisting of the accelerator openness and automobile speed. The accidental shifting control method is easy to realize software and hardware and convenient to apply in actual automobile.
Description
Technical field
The present invention relates to the unexpected shift control method of a kind of automatic speed changing automobile, the control method of phenomenon of surprisingly shifting gears according to the inner link elimination automatic speed changing automobile of automobile gear shift controling parameters.
Background technology
Mainly concentrate on and by analyzing driver intention, correction is carried out eliminate unexpected phenomenon of shifting gears to schedule by different intelligent control methods for eliminating surprisingly the shift gears research of phenomenon control method of automatic speed changing automobile, and lack considering driver intention and vehicle running state.Meanwhile, due to the restriction by hardware, these current achievements in research are not easily applied to real vehicle.
Summary of the invention
Technical matters to be solved by this invention will provide a kind of be easy to realize and be convenient to the unexpected shift control method of automatic speed changing automobile of real vehicle application.
In order to solve above technical matters, the invention provides the unexpected shift control method of a kind of automatic speed changing automobile, this control method utilizes the inner link between vehicle running state and shift control parameters, and based on the schedule formulated, on schedule diagram of curves, dynamic local system of axes is set up as transverse and longitudinal coordinate using the speed of a motor vehicle and accelerator open degree, the speed of a motor vehicle of this system of axes with vehicle and the variation track dynamic change of accelerator open degree, in vehicle travel process, when the coordinate points that accelerator open degree and the speed of a motor vehicle form, the i.e. angle in the vector that forms of changing coordinates point and next coordinate points and speed of a motor vehicle direction
when first quartile along system of axes changes, as the process of normal upshift process, and carry out gearshift control by normal upshift operation, the angle in the vector that changing coordinates point and next coordinate points form and speed of a motor vehicle direction
when third quadrant along system of axes changes, as the process of normal downshift process, carry out gearshift by normal downshift operation and control, the angle in the vector that changing coordinates point and next coordinate points form and speed of a motor vehicle direction
when changing along system of axes fourth quadrant, as the process of unexpected upshift process, enter unexpected upshift treatment scheme, the angle in the vector that changing coordinates point and next coordinate points form and speed of a motor vehicle direction
when changing along system of axes second quadrant, first by accelerator open degree rate of change
judge whether driving intention I is anxious acceleration, accelerate if anxious, then carry out normal downshift process, otherwise as unexpected downshift treatment scheme.
Describedly on schedule diagram of curves, set up dynamic local system of axes as transverse and longitudinal coordinate using the speed of a motor vehicle and accelerator open degree, vehicle current running state coordinate points is O1, and the vehicle running state coordinate points of next sampling point is O2, vector
be set to the angle in speed of a motor vehicle direction
, can be obtained by the triangle relation of vector end point coordinate:
（1）
Formula (1) is utilized to calculate by reading current sampling point vehicle running state and next sampling point vehicle running state
, and relevant information is saved in digraph node;
Wherein:
for the accelerator open degree of current sampling point,
for the speed of a motor vehicle of current sampling point,
for the accelerator open degree of next sampling point,
for the speed of a motor vehicle of next sampling point.
Described unexpected upshift treatment scheme, is that to maintain current shift constant, until after vehicle keeps the regular hour near a certain stable motoring condition, re-starts gearshift and judging.
Described unexpected downshift treatment scheme, first judges whether driving intention is normal anxious acceleration, is then as the process of normal downshift process; Not then for unexpected downshift, carry out unexpected downshift control, maintain current shift constant, carry out preview control until after vehicle-state keeps the regular hour near a certain stabilized conditions, re-starting gearshift and judging.
Superior effect part of the present invention: only need to judge that coordinate points that accelerator open degree and the speed of a motor vehicle form just can identify along the variation track of set up dynamic local system of axes and normally shift gears or accident is shifted gears; this control method is easy to software and hardware and realizes, and is convenient to real vehicle application.
Accompanying drawing explanation
Fig. 1 is normal shift process schematic diagram of the present invention;
Fig. 2 is unexpected upshift process schematic of the present invention;
Fig. 3 is elimination of the present invention unexpected gearshift phenomenon control method deterministic process schematic diagram;
Fig. 4 is dynamic local system of axes of the present invention;
Fig. 5 is elimination of the present invention unexpected gearshift phenomenon control method realization flow.
Detailed description of the invention
Refer to shown in accompanying drawing, the invention will be further described.
Fig. 1 represents conventional shift process based on digraph.Digraph is utilized to carry out abstract representation to shift process, both the gear change procedure in vehicle travel process had clearly been described, also the formulation of gearshift control policy is conducive to, wherein, in shift process, the gear information of vehicle is represented by the node of digraph, preserve vehicle running state variable in node, as accelerator open degree, the speed of a motor vehicle, gear and other to gearshift control relevant information, the switching of upshift and downshift process is represented by the direction of internodal directed edge.
Fig. 2 is the unexpected upshift process represented based on digraph.Vehicle drives to 4 gears with normal condition, and then Das Gaspedal is unclamped fast.With Fig. 1 conventional shift process unlike, because accelerator open degree reduces rapidly, and speed of a motor vehicle response lag, cause the unexpected upshift line rising 5 gears through 4 gears, there occurs the unexpected upshift phenomenon of 4 gears to 5 gears, along with the reduction again of accelerator open degree, cause the upshift line rising 6 gears through 5 gears, there occurs again the unexpected upshift phenomenon that 5 gears rise 6 gears.Along with the continuous reduction of the speed of a motor vehicle, vehicle drops to 1 gear by 6 gear orders, to the last stops.
Fig. 3 eliminates unexpected gearshift phenomenon control method deterministic process schematic diagram.First, based on conventional shift rule, dynamic local system of axes (as shown in Figure 4) is set up as horizontal, ordinate using the speed of a motor vehicle and accelerator open degree, this system of axes is with the variation track dynamic change of the speed of a motor vehicle and accelerator open degree, state in Fig. 3 dotted line frame is vehicle current running state, when the coordinate points that accelerator open degree and the speed of a motor vehicle form changes along the first quartile of system of axes, belong to normal upshift process, carry out gearshift control by normal upshift operation; When the coordinate points that accelerator open degree and the speed of a motor vehicle form changes along third quadrant, belong to normal downshift process, carry out gearshift by normal downshift operation and control.When the coordinate points that accelerator open degree and the speed of a motor vehicle form changes along system of axes fourth quadrant, belong to unexpected upshift process (as accelerator open degree reduces, but the descending operating mode that the speed of a motor vehicle increases and damped condition etc.), enter unexpected upshift treatment scheme, now, first maintain current shift constant, until after vehicle keeps the regular hour (as choosing 100ms) near a certain stable motoring condition, re-starting gearshift and judging; When the coordinate points that accelerator open degree and the speed of a motor vehicle form changes along the second quadrant, belong to unexpected downshift process (as throttle increases, but the upward slope operating mode etc. that the speed of a motor vehicle reduces), now, deterministic process is as unexpected upshift treatment scheme, first current shift is maintained constant, carry out preview control until after vehicle-state keeps the regular hour near a certain stabilized conditions, re-start gearshift to judge, when driving intention is for anxious acceleration, according to the process of normal downshift process, so that downshift makes vehicle obtain larger acceleration/accel in time, vehicle acceleration is travelled.
Fig. 4 is the dynamic local system of axes for eliminating the foundation of unexpected shift control method.Vehicle current running state coordinate points is O1, and the vehicle running state coordinate points of next sampling point is O2, vector
be set to the angle in speed of a motor vehicle direction
, can be obtained by the triangle relation of vector end point coordinate:
（1）
Formula (1) is utilized to calculate by reading current sampling point vehicle running state and next sampling point vehicle running state
, and relevant information is saved in digraph node, then according to dynamic local system of axes, shift process is judged, normal gearshift or unexpected gearshift can be judged fast based on this, the process of line correlation of going forward side by side,
quadrant divide as the formula (2).
（2）
In formula,
for the accelerator open degree of current sampling point,
for the speed of a motor vehicle of current sampling point,
for the accelerator open degree of next sampling point,
for the speed of a motor vehicle of next sampling point.
Fig. 5 is the realization flow figure eliminating unexpected gearshift phenomenon control method.In vehicle travel process, change-speed box electric-control system reads current and vehicle running state data packet that is next sampling point continuously and draws together accelerator open degree, the speed of a motor vehicle etc., is calculated by above-mentioned formula (1)
value, then, judges which quadrant condition it meets, when meeting first quartile condition, belonging to normal upshift, carrying out upshift process control, after completing, continues the judgement of gearshift logic; If
value meets third quadrant condition, belongs to normal downshift, carries out downshift process control, after completing, continues the judgement of gearshift logic.If
value meets the second quadrant condition, now according to the normal downshift control policy of anxious accelerating mode, judge whether it is normal anxious acceleration downshift operating mode, normal downshift control is carried out when meeting anxious acceleration environment, and when being unexpected downshift, carry out unexpected downshift control, first maintain current shift constant and read vehicle status data, compare with previous state thus judge whether vehicle is in stabilized conditions, when not meeting steady-state condition, continue the judgement of reading vehicle status data and carrying out stabilized conditions, when vehicle is in stabilized conditions, start the time length of calculation stability state, when time length is more than or equal to set time threshold, re-start gearshift to judge, if
value meets fourth quadrant condition, belong to unexpected upshift, carry out unexpected upshift process control, first maintain current shift constant and read vehicle status data, compare with previous state thus judge whether vehicle is in stabilized conditions, when not meeting steady-state condition, continue the judgement of reading vehicle status data and carrying out stabilized conditions, when vehicle is in stabilized conditions, start the time length of calculation stability state, when time length is more than or equal to set time threshold, re-starts gearshift and judge.
Claims (3)
1. the unexpected shift control method of automatic speed changing automobile, this control method utilizes the inner link between vehicle running state and shift control parameters, and based on the schedule formulated, on schedule diagram of curves, dynamic local system of axes is set up as transverse and longitudinal coordinate using the speed of a motor vehicle and accelerator open degree, the speed of a motor vehicle of this system of axes with vehicle and the variation track dynamic change of accelerator open degree, in vehicle travel process, when the coordinate points that accelerator open degree and the speed of a motor vehicle form, i.e. the angle in the vector that forms of changing coordinates point and next coordinate points and speed of a motor vehicle direction
when first quartile along system of axes changes, as the process of normal upshift process, and carry out gearshift control by normal upshift operation; When
when third quadrant along system of axes changes, as the process of normal downshift process, carry out gearshift by normal downshift operation and control; When
when changing along system of axes fourth quadrant, as the process of unexpected upshift process, enter unexpected upshift treatment scheme; When
when changing along system of axes second quadrant, first by accelerator open degree rate of change
judge whether driving intention I is anxious acceleration, accelerate if anxious, then carry out normal downshift process, otherwise as unexpected downshift treatment scheme; Wherein, describedly on schedule diagram of curves, set up dynamic local system of axes as transverse and longitudinal coordinate using the speed of a motor vehicle and accelerator open degree, vehicle current running state coordinate points is O1, and the vehicle running state coordinate points of next sampling point is O2, vector
be set to the angle in speed of a motor vehicle direction
, can be obtained by the triangle relation of vector end point coordinate:
（1）
Formula (1) is utilized to calculate by reading current sampling point vehicle running state and next sampling point vehicle running state
, and relevant information is saved in digraph node;
Wherein:
for the accelerator open degree of current sampling point,
for the speed of a motor vehicle of current sampling point,
for the accelerator open degree of next sampling point,
for the speed of a motor vehicle of next sampling point.
2. the unexpected shift control method of automatic speed changing automobile according to claim 1, described unexpected upshift treatment scheme is that to maintain current shift constant, until after vehicle keeps the regular hour near a certain stable motoring condition, re-starting gearshift and judging.
3. the unexpected shift control method of automatic speed changing automobile according to claim 1, described unexpected downshift treatment scheme, first judges whether driving intention is normal anxious acceleration, is then as the process of normal downshift process; Not then for unexpected downshift, carry out unexpected downshift control, maintain current shift constant, carry out preview control until after vehicle-state keeps the regular hour near a certain stabilized conditions, re-starting gearshift and judging.
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| CN105042062B (en) * | 2015-05-19 | 2017-09-15 | 潍柴动力股份有限公司 | A kind of shift control method and device |
| CN107808427A (en) * | 2017-09-28 | 2018-03-16 | 航天科技控股集团股份有限公司 | A kind of car data statistical method based on CAN |
| CN109869480A (en) * | 2019-02-22 | 2019-06-11 | 北京长城华冠汽车科技股份有限公司 | Pure electric vehicle and its process for gear |
| CN112855920B (en) * | 2019-11-27 | 2022-04-26 | 广州汽车集团股份有限公司 | Calculation method and gear shifting method for continuous speed ratio of double-clutch transmission |
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| JPS624640A (en) * | 1985-06-29 | 1987-01-10 | Fuji Heavy Ind Ltd | Control device of continuously variable speed change gear |
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| CN101324269A (en) * | 2007-06-15 | 2008-12-17 | 加特可株式会社 | Automatic transmission control apparatus |
| CN102102756A (en) * | 2011-03-21 | 2011-06-22 | 重庆长安汽车股份有限公司 | Method for controlling AT (automatic transmission) difference value gear shifting process |
| CN102128258A (en) * | 2011-03-21 | 2011-07-20 | 重庆长安汽车股份有限公司 | AT (Automatic Transmission) gear shift control method for emergency accelerator slacking |
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2012
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Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS624640A (en) * | 1985-06-29 | 1987-01-10 | Fuji Heavy Ind Ltd | Control device of continuously variable speed change gear |
| JPH02173464A (en) * | 1988-12-23 | 1990-07-04 | Mazda Motor Corp | Speed change timing detecting method for vehicle with automatic transmission |
| CN1453160A (en) * | 2002-04-25 | 2003-11-05 | 丰田自动车株式会社 | Vehicle drive controlling apparatus and method |
| CN1965183A (en) * | 2004-04-07 | 2007-05-16 | 标致.雪铁龙汽车公司 | Method for controlling automatic or automated transmission downshift used for power braking |
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