Transmission Speed ​​Synchronization Method

Abstract

The invention discloses a gearbox rotating speed synchronization method. The gearbox rotating speed synchronization method comprises the steps that vehicle state information is acquired; the standardrotating speed synchronization time is acquired according to the vehicle state information; and according to the standard rotating speed synchronization time, the clutch pressing degree is adjusted and the rotating speed of an engine is reduced when the synchronous rotating speed is achieved. The standard rotating speed synchronization time is (Af+B+C+D) / KE, wherein f is an adaptation value, takesa value 1 when a vehicle has a driving mode, and otherwise, takes a value 0, B is a simulated digital value of a target gear, C is a simulated digital value of the gear shifting type, D is the percentage value of the accelerator opening degree, K is an adjusting coefficient, and E is an adjusting constant. According to the gearbox rotating speed synchronization method, the corresponding standardrotating speed synchronization time is obtained through the vehicle state information, and the clutch pressing degree is adjusted and the rotating speed of the engine is reduced when the synchronous rotating speed is achieved according to the time in a corresponding mode; and a plurality of factors are considered in the mode, so that the adjustment is finer, and rapid gear shifting is realized while the smoothness of gear shifting is ensured.

Description

technical field

[0001] The invention relates to a method for synchronizing the rotating speed of a gearbox. Background technique

[0002] Compared with other automatic transmissions, dual clutch automatic transmissions (Dual Clutch Transmission, DCT) have the advantages of high power transmission efficiency, fast shifting speed, and fuel economy. Therefore, dual clutch automatic transmissions are favored by more and more OEMs.

[0003] The shifting condition is the most frequently used in the driving process of the vehicle, and the shifting speed is the advantage of the DCT gearbox compared to other gearboxes. However, if the shift is too fast, it is easy to cause shift shock. Contents of the invention

[0004] The purpose of the present invention is to provide a method for synchronizing the rotational speed of a gearbox, which reduces the impact during the shifting process and improves the smoothness and comfort of the shifting.

[0005] The transmission speed synchroni...

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