Clutch control method of hybrid vehicle

Abstract

The present disclosure provides a clutch control method of a hybrid vehicle of the including an entering condition determining step in which a controller determines whether shifting is being performed during regenerative braking; an error calculating step in which the controller calculates a torque error by subtracting observer torque, which is clutch transfer torque calculated by a clutch torque estimator receiving transmission input torque and motor speed, from map torque, which is clutch transfer torque calculated based on a clutch transfer torque map for clutch actuator strokes learned in advance, when shifting is being performed during regenerative braking; a correcting step in which the controller corrects the clutch transfer torque map for the clutch actuator strokes using the torque error calculated in the error calculating step; and a clutch control step in which the controller controls a clutch using the map corrected in the correcting step.

Description

technical field [0001] The invention relates to a clutch control method of a hybrid vehicle. Background technique [0002] The statements in this section merely provide background information related to the present disclosure and may not constitute prior art. [0003] Generally speaking, a power train that transmits power from an engine and a motor to a transmission through a dry clutch has such a connection structure that includes: an engine, an engine clutch, a motor, a dry clutch, and a transmission, wherein the transmission can be an automatic manual transmission ( automated manual transmission (AMT) or dual clutch transmission (dualclutch transmission, DCT). figure 1 An example of a powertrain using DCT is shown. [0004] For reference, the dry clutch between the motor and the transmission is in some cases considered a component of the AMT or DCT, but is assumed to be a separate component in this paper, as figure 1 as illustrated. [0005] A dry clutch (hereinafter ...

AI Technical Summary

Problems solved by technology

[0005] A dry clutch (hereinafter simply referred to as a "clutch") has a clutch transmission torque that varies greatly depending on factors such as the degree of friction determined by the one-way tolerance and durability of the clutch components, Thermal deformation caused by thermal deformation and changes in the coefficient of friction, so it is difficult to accurately determine the transmission torque transmitted by the clutch when the vehicle is running

[0006] However, as the clutch in the vehicle is controlled, if the variation of the transmitted torque is unknown, the clutch may slip excessively or generate vibration when engaged, so it is necessary to estimate and correct the characteristics of the clutch's transmitted torque in real time

Images