Clutch oil charging time control method in large-power AT gear shifting process

Abstract

The invention discloses a clutch oil charging time control method in the large-power AT gear shifting process. The clutch oil charging time control method is characterized in that the clutch oil charging time control method comprises the steps that the large-power AT gear shifting process is divided into a clutch engagement process and a clutch separation process, and the clutch engagement process and the clutch separation process are divided into different control stages; and vehicle information is detected, and the duration time of all the control stages of the clutch engagement process and all the control stages of the clutch separation process is determined based on the detected vehicle information. According to the clutch oil charging time control method, the clutch working state in the gear shifting process is divided into different working stages, and control is conducted on the basis of the detected vehicle information, and the control precision of a clutch is effectively improved; and meanwhile owing to the fact that the control precision of the clutch is improved, gear shifting smoothness can further be effectively improved, and the service life of the clutch is prolonged.

Description

technical field [0001] The invention relates to the technical field of vehicle automatic gear shift control, in particular to a method for controlling the oil filling time of a clutch during a high-power AT gear shift process. Background technique [0002] Hydraulic automatic transmission (Automatic Transmission, AT) is a kind of automatic transmission, because it has many advantages, and its development is relatively mature, so it has been widely used. [0003] Moreover, according to the different characteristics of AT, AT can be further divided, among which, especially high-power AT, because of its excellent torque transmission capability, good shift quality, smooth starting ability and excellent acceleration performance, etc. Many features make the high-power AT the preferred solution for various heavy-duty vehicles such as off-road vehicles, engineering vehicles, and high-end commercial vehicles. [0004] At present, AT is mainly composed of three parts: hydraulic torqu...

AI Technical Summary

Problems solved by technology

For example: when the AT is shifting gears, the hydraulic control system needs to control the engagement or separation of the clutch. If the timing and control pressure of the clutch engagement or separation are not well controlled, a shift shock will inevitably occur; and, if the clutch engagement or separation time If it is too long, it will prolong the sliding friction process time of the clutch, increase the wear and thermal load of the friction plate in the clutch, and then affect the service life of the clutch; on the contrary, if the clutch engagement or disengagement time is too short, the dynamic load of the transmission system will Will be greatly increased, resulting in impact, which will affect the smoothness of shifting

[0005] The current clutch control method for the AT shift process, especially in the high-power AT shift process, is relatively complicated, which makes it inconvenient to use. Moreover, the current control of the clutch has not been carried out effectively for its different working stages. It is difficult to improve the accuracy of the clutch control process by dividing it into different working stages and carrying out separate control.

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