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Time-based automatic shifting law formulation method

An automatic and regular technology, applied in the direction of transmission control, toothed components, belts/chains/gears, etc., can solve problems such as cyclic shifting or affect shifting time, and achieve the effect of avoiding cyclic shifting

Active Publication Date: 2010-12-08
HUAWEI TEHCHNOLOGIES CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the deficiency that the shifting rule of the prior art is likely to cause cyclic shifting or affect the shifting time, and provide a shift speed point that will change due to changes in acceleration, avoiding cyclic shifting and affecting shifting time Disadvantages of Time-Based Automatic Shifting Law Formulation Method

Method used

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Examples

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Embodiment

[0020] Embodiment: A kind of time-based automatic gear-shifting rule formulating method, this method is based on the control system of dual-clutch automatic transmission, is stored in the transmission control unit TCU of control system in the mode of program, this method comprises the following steps (flow process see attached figure 1 ):

[0021] a, according to the shift pattern diagram (shift pattern is the prior art, no longer repeats here, is different from the gear shift pattern of the present invention) that has been stored in the internal memory of the TCU by the throttle opening and the gearshift vehicle speed ) and real-time detection data throttle opening and current gear calculation to obtain the target shift speed V;

[0022] b. Utilize the sensor in the control system to detect the current driving speed V1 in real time, automatically record and save it in the internal memory of the TCU; the current driving speed V1 is the data detected and updated in real time, ...

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PUM

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Abstract

The invention discloses a time-based automatic shifting law formulation method. The method comprises the following steps: on the basis of a control system of a dual-clutch-transmission (DCT), storing the method in a transmission control unit (TCU) of the control system in a program manner; comparing the relationship between acceleration time t and setting time t0 in the TCU in real time according to target shifting velocity V, current running velocity V1 and acceleration a; and when t is more than t0, continuously detecting, and then shifting a target gear via a synchronizer when t is equal to t0 to achieve the purpose of previously shifting the target gear. In the method, shifting velocity points change with change of the acceleration, thereby avoiding defects of circular shifting and influence on shifting time.

Description

technical field [0001] The invention relates to a control strategy of an automatic transmission, more specifically to a time-based method for formulating automatic shifting rules. Background technique [0002] DCT (Dual-clutch-Transmission, dual-clutch automatic transmission) contains two automatically controlled clutches, which are electronically controlled and hydraulically driven, and can simultaneously control the operation of the two clutches. When the transmission is in operation, a group of gears is engaged, and when the shift is approaching, the gears of the next group of gears have been pre-selected, but the clutch is still disengaged; when shifting, a clutch disengages the gears in use, At the same time, the engagement of another clutch has been pre-selected, which can ensure that at least one group of gears is outputting power during the entire shifting period, so that there will be no power interruption. In order to cooperate with the above operations, the drive...

Claims

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Application Information

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IPC IPC(8): F16H59/36F16H59/68F16H61/16
Inventor 刘文忠徐秀华陈勇尹宏声李书福杨健赵福全
Owner HUAWEI TEHCHNOLOGIES CO LTD
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