Automatic transmission gear self-learning method and transmission control unit
A technology of transmission control and automatic transmission, which is applied in the direction of transmission control, components with teeth, belts/chains/gears, etc. It can solve the problems of automatic gear switching, traffic accidents, and reduced gear switching accuracy.
Active Publication Date: 2019-01-04
WEICHAI POWER CO LTD
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Problems solved by technology
In both cases, the gear selection position and the gear engagement position saved in the TCU do not match the size of each device in the automatic transmission, which reduces the accuracy of gear switching and may cause the gear to fail to switch automatically, resulting in traffic accident happened
Method used
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[0048] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided for more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.
[0049] The embodiment of the present invention provides an automatic transmission gear self-learning method, which is applied to the transmission control unit, and the transmission control unit stores the gear selection position point of the gear to be learned and the gear engagement position of the gear to be learned point.
[0050] in, figure 1 It is a schematic diagram of the gear position of an automatic transmission, such as ...
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The invention discloses an automatic transmission gear self-learning method and a transmission control unit. A gear-shifting finger can be controlled to successively move to a left gear-selecting boundary point and a right gear-selecting boundary point of a gear to be learnt, and the midpoint of the left gear-selecting boundary point and the right gear-selecting boundary point is used as a gear-selecting position point obtained by learning; a gear-selecting position point of a gear to be learned saved in the transmission control unit is replaced with the gear-selecting position point obtainedby learning; the gear-shifting finger is controlled to successively move to a left gear-engaging boundary point and a right gear-engaging boundary point of the gear to be learnt, and according to themagnitude relationship between the distance from the left gear-engaging boundary point to the gear-selecting position point obtained by learning and the distance from the right gear-engaging boundarypoint to the gear-selecting position point obtained by learning, a gear-engaging position point of the gear to be learnt saved in the transmission control unit is replaced with the right gear-engagingboundary point or the left gear-engaging boundary point. The automatic transmission gear self-learning method and the transmission control unit realize the self-learning of the gear-selecting position point and the gear-engaging position point by controlling the movement of the gear-shifting finger, and the accuracy of gear switching is improved.
Description
technical field [0001] The invention relates to the field of transmission control, in particular to an automatic transmission gear self-learning method and a transmission control unit. Background technique [0002] With the rapid development of electronic control technology, the automatic control technology of vehicle transmission is constantly improving. [0003] The transmission control unit (Transmission Control Unit, TCU) can control the automatic transmission to automatically switch gears according to the speed of the vehicle and the speed of the engine, which reduces the driver's work. The TCU stores the gear selection position and the gear engagement position. When it is necessary to switch to a certain gear, the TCU controls the shift finger of the automatic transmission to move to the gear selection position and the gear engagement position corresponding to the gear. Gear switching can be realized. [0004] In the prior art, the gear selection position and the gea...
Claims
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Login to View More IPC IPC(8): F16H59/02F16H61/02
CPCF16H59/02F16H61/0204F16H2059/0221
Inventor 史辉英韩福强王德军吴学强邓金涛
Owner WEICHAI POWER CO LTD