Double clutch transmission gear pre-engagement control method and system as well as vehicle

Abstract

The invention discloses a double clutch transmission gear pre-engagement control method. The double clutch transmission gear pre-engagement control method comprises the following steps: in a non-pre-engagement state, identifying the current gear position of a vehicle, and determining the current gear input shaft and the non-current gear input shaft according to the current gear position; controlling all gear shifting forks of the non-current gear input shaft to be in the neutral gear position; and when judging that the vehicle meets the preset gear shifting condition according to running parameters of the vehicle, controlling the non-current gear clutch to be disengaged, and engaging the target gear, corresponding to the running parameters, on the non-current gear input shaft, wherein the running parameters of the vehicle comprise the current vehicle speed. The invention further provides a double clutch transmission gear pre-engagement control system as well as the vehicle. According to the double clutch transmission gear pre-engagement control method and system as well as the vehicle, the prejudgment and pre-engagement accuracy and efficiency are improved, and the problems that the clutch is ablated or a gear component has a transient failure due to long-time simultaneous engagement of an odd-numbered gear and an even-numbered gear during the non-gear shifting process of the transmission are avoided.

Description

technical field [0001] The invention relates to the field of dual-clutch transmissions, in particular to a pre-engagement control method, system and vehicle of the dual-clutch transmission. Background technique [0002] Based on target gear pre-engagement and dual-clutch seamless interaction, dual-clutch transmission realizes fast shifting without power interruption, improves vehicle fuel economy and power performance, and has developed rapidly all over the world, especially in Eurasia. Target gear pre-engagement means that the dual-clutch transmission pre-hangs the gear shift fork to the target gear position before shifting gears. It is an important part of the dual-clutch transmission control technology. Response speed has an important impact. [0003] The dual-clutch transmission includes a wet dual-clutch transmission and a dry dual-clutch transmission. The two clutches of the wet dual-clutch transmission are immersed in oil. When the clutch is open and the correspondin...

AI Technical Summary

Problems solved by technology

[0006] 1. Due to the variability of the driver's driving intention, premature prediction and pre-engagement of the target gear will inevitably increase the probability of misjudgment and mis-engagement, increase unnecessary gear shifting and disengagement actions, and shorten the life of the synchronizer components. The life cycle

[0007] 2. The transmission engages odd and even gears at the same time for a long time during the non-shifting process, one of the clutches is in the closed state, and the other clutch is in the open state, and there are faults such as failure of the supporting bearing of the non-current gear clutch that cause the clutch to engage abnormally This kind of fault is difficult to be diagnosed by software in the early stage of the fault, and the simultaneous engagement of two clutches will lead to clutch ablation or instantaneous failure of gear components

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