Gear shifting control method for changing intention in unpowered upshift process
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: 2021-06-18
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 intention in an unpowered upshift process. The gear shifting control method comprises the following steps: dividing a conventional unpowered upshift process into a plurality of stages, formulating a corresponding gear shifting control method according to the situation that an accelerator or a brake is suddenly stepped by changing intention under different stages and different conditions in the unpowered upshift process, and directly ending the unpowered uplift process. Compared with a traditional control method that upshift operation needs to be executed firstly and then downshift operation needs to be executed, according to the gear shifting control method, the driving intention of a driver can be better met, the gear shifting time is shortened, and the response speed and the gear shifting 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 王书翰郑威徐向阳董鹏刘艳芳郭伟支景锋陈一铉王涛
Owner BEIHANG UNIV