A shift control method for changing intention during upshift without power
A technology of intent and power, which is applied in the field of gear shift control in which the intent is changed during upshifting without power, can solve the problems of no effective method, long shift time, and inability to respond to the driver's driving intention in a timely manner, so as to improve the response speed and shifting efficiency, shortening the effect of shifting time
Active Publication Date: 2021-07-27
BEIHANG UNIV
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Problems solved by technology
[0004] The traditional shift control method of changing the intention to slam on the accelerator or brake suddenly in the process of unpowered upshifting needs to perform two consecutive shifting processes, that is, first perform the upshifting operation and then perform the downshifting operation, resulting in long shifting time, Affects the shifting efficiency and cannot respond to the driver's driving intention in time
[0005] At present, there is no effective method for shift control in China to change the intention to slam on the accelerator or brake suddenly during the process of upshifting without power
Method used
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Embodiment 1
[0027] In the process of clutch control for powerless upshifting, it is first judged whether the driver intends to step on the accelerator or brake suddenly; if the driver does not intend to step on the accelerator or brake suddenly, the oil pressure of the separation clutch is gradually reduced 0, at the same time, the oil pressure of the engaged clutch is gradually increased to the engaged oil pressure of the engaged clutch; if the driver intends to slam on the accelerator or brake suddenly, perform the following operations:
[0028] (1) If the driver slams on the accelerator or suddenly brakes during the oil filling stage or the speed regulation stage, the speed regulation speed is less than the first preset value ( greater than 0 and less than or equal to the change value of the speed regulation speed in the speed regulation stage) and the speed regulation time is less than the second preset value ( is greater than 0 and less than or equal to the change value of the ...
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The invention discloses a gear shifting control method for changing intentions in the process of unpowered upshifting, by dividing the conventional unpowered upshifting process into several stages, aiming at changing intentions in different stages and under different circumstances in the unpowered upshifting process. In the case of accelerator pedal or sudden brake, formulate a corresponding shift control method, which can directly end the unpowered upshift process. Compared with the traditional control method that needs to perform upshift operation first and then perform downshift operation, it can better fit According to the driver's driving intention, the shift time is shortened, and the response speed and shift efficiency are improved.
Description
technical field [0001] The invention relates to the technical field of transmissions, in particular to a shift control method for changing intentions during a powerless upshift. Background technique [0002] With the rapid development of automatic transmissions, the loading capacity of automatic transmissions is also increasing rapidly, and people's requirements for shifting efficiency and shifting comfort of cars equipped with automatic transmissions are increasing day by day. [0003] The process of upshifting without power often occurs when the vehicle accelerates rapidly with a large throttle. The driver releases the accelerator pedal to stop accelerating. The transmission needs to upshift as soon as possible to reduce the engine speed, reduce the engine's back-drag power, and obtain higher fuel economy. . If the driver slams on the accelerator during an unpowered upshift, the automatic transmission needs to downshift in order to achieve greater acceleration. If the dr...
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IPC IPC(8): F16H61/02
CPCF16H61/0265
Inventor ηδΉ¦ηΏ°ιε¨εΎει³θ£ιΉεθ³θ³ιδΌζ―ζ―ιιδΈιηζΆ
Owner BEIHANG UNIV