A method and device for self-learning of position of clutch half-joint point

Abstract

The invention discloses a method and a device for self-learning of the position of a clutch half-joint point, and relates to the technical field of vehicle engineering. The method for self-learning of the position of the clutch half-joint point includes: determining that the vehicle meets the operating condition of the clutch half-joint point self-learning working condition; when the vehicle meets the operating condition, recording the torque of the parallel driving engine, and fixing the torque of the engine as the parallel driving engine torque holding remain unchanged; adjust the rotational speed of the engine through the generator until the difference between the rotational speed of the engine and the target rotational speed of the engine remains within the first preset range within the first preset time, and record the current torque of the generator as GmTqThd; Detect the difference between the real-time torque of the generator and GmTqThd, increase the current of the clutch solenoid valve in turn with a preset step size and detect the difference, and use the final recorded current value of the clutch solenoid valve as the current value of the clutch half-joint point. The self-learning value of the learning case.

Description

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

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.

Images