Clutch semi-combination point position self-learning method and device

Abstract

The invention discloses a clutch semi-combination point position self-learning method and device, and relates to the technical field of vehicle engineering. The clutch semi-combination point position self-learning method comprises the steps: judging that a vehicle meets the running condition of a clutch semi-combination point self-learning working condition; when the vehicle meets the running condition, recording the torque of a parallel drive engine, and fixing the torque of the engine to be the torque of the parallel drive engine and keeping the torque unchanged; adjusting the rotating speed of the engine by a generator until the difference value between the rotating speed of the engine and the target rotating speed of the engine is continuously kept within the first preset range within the first preset time, and recording the current torque of the generator as GmTqThd; and detecting the difference value between the real-time torque of the generator and GmTqThd, sequentially increasing the current of a clutch electromagnetic valve with a preset step length as the unit, detecting the difference value, and taking the finally recorded current value of the clutch electromagnetic valve as a self-learning value of the clutch semi-combination point self-learning working condition of this time.

Description

technical field [0001] The invention relates to the technical field of vehicle engineering, in particular to a method and device for self-learning the position of a half-joint point of a clutch. Background technique [0002] For a dual-motor hybrid hybrid vehicle, when the clutch is disengaged, the vehicle is in the series driving mode, and the engine speed is decoupled from the vehicle speed so that the engine can work in the economic zone; when the clutch is engaged, the vehicle is in the parallel driving mode, and the engine speed and The vehicle speed has a fixed speed ratio relationship; when switching from the series drive mode to the parallel drive mode, the clutch needs to be engaged. Since the engine speed is not synchronized with the vehicle speed before the clutch is engaged, the engine speed is usually adjusted to be synchronized with the vehicle speed through the generator. state, and then the clutch is engaged to reduce the impact of the vehicle during the clut...

AI Technical Summary

Problems solved by technology

[0003] However, if the engine speed is adjusted to a process state that is completely synchronized with the vehicle speed through the generator, the speed adjustment process will take a long time

Because there is a gap in the clutch, there is a certain volume in the clutch-related pipelines. Therefore, if the clutch set pressure gradually increases from 0, the clutch pressure build-up time will be too long, which will cause the entire series-parallel switching time to become longer, which will affect the driving quality.

And for dual-motor hybrid hybrid vehicles, the engine speed is usually adjusted through the generator instead of completely eliminating the speed difference through clutch engagement, so the self-learning method of the half-engagement point position of the traditional clutch cannot be used.

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