Gear-shifting control method and device

Abstract

The invention provides a gear-shifting control method and device, and is applied to the technical field of automobiles. The method comprises the steps of after adjusting the engine rotate speed to thetarget gear-shifting rotate speed, directly controlling an automated mechanical transmission (AMT) to engage a gear, and if the AMT is failed to engage the gear, repetitively executing the followingsteps until the AMT engages the gear successfully or meets the preset exit condition: updating the target gear-shifting rotate speed; controlling a clutch to separate to a first position set on the basis of a slipping frictional point, and adjusting the engine rotate speed to the updated target gear-shifting rotate speed; and controlling the clutch to separate to a separate termination position, controlling the AMT to engage the gear again. According to the method, after the engine rotate speed is adjusted to the target gear-shifting rotate speed, the AMT is directly controlled to engage the gear, and if the gear is engaged successfully, the clutch separation time can be saved; and if the gear is failed to be engaged, the time on independently executing the clutch separation process can besaved, so that the influence on the gear-shifting time due to the long clutch executing mechanism action time is reduced, the gear-shirting time of the AMT is shortened, and the timeliness of the AMTresponding to a gear-shifting command is improved.

Description

technical field [0001] The invention belongs to the technical field of automobiles, and in particular relates to a shift control method and device. Background technique [0002] The shifting process of AMT (Automatic Mechanical Transmission, automatic transmission) can generally be divided into steps such as clearing twist, removing gear, engaging and disengaging, speed regulation, disengaging and engaging, engaging gear and engaging and disengaging. The sum of the execution time of each step is AMT The shift time required to perform a shift operation. [0003] In the prior art, most of the clutch actuators are electronically controlled and electric, and the electronically controlled clutch actuators generally have the problem of long operation time, which leads to long shifting time of AMT and insufficient timeliness in responding to shift commands. [0004] Therefore, how to optimize the shift control process, reduce the impact of the long action time of the clutch actuat...

AI Technical Summary

Problems solved by technology

[0003] In the prior art, most of the clutch actuators are electronically controlled and electric, and the electronically controlled and electric clutch actuators generally have the problem of long operation time, which leads to long shifting time of AMT and insufficient timeliness of responding to shifting commands.

Images