TRANSMISSION CONTROL METHOD DURING REGENERATIVE BRAKING OF HYBRID VEHICLE

摘要

A transmission control method during regenerative braking of a hybrid vehicle is directed to providing a transmission control method during regenerative braking of a hybrid vehicle that is capable of accurately estimating the regenerative braking execution amount, by constantly controlling the transmission output torque, that is, the regenerative braking execution amount, until the transmission input speed reaches the speed corresponding to the target transmission stage, through the operating element torque and motor torque intervention control for transmission, when transitioning to the target transmission stage from the current transmission stage of the multistage automatic transmission of the hybrid vehicle, and is capable of accurately estimating the regenerative braking execution amount and simultaneously securing the braking linearity during transmission.

主权项

1. A transmission control method during regenerative braking of a hybrid vehicle comprising:
a transmission control phase during regenerative braking; a torque control phase of causing a transmission output torque (TTM—Out) to follow a wheel torque (Twhl—dmd (GP=j)) of a current transmission stage, through a torque control and a motor torque intervention control of a coupling side operating element and a release side operating element; an inertia control phase in which a synchronization control of setting a transmission input speed (rpm) to be a speed corresponding to a target transmission stage is performed and simultaneously a transmission output torque (TTM—out) is equally followed to the torque control phase; a transmission completion control phase of interrupting a motor torque intervention control on a current transmission input torque [Tq (Input)] such that the transmission output torque (TTM—Out) transitions to the wheel torque [Twhl—dmd (GP=j−1)] of the target transmission stage; and a regenerative braking amount estimation phase of estimating the regenerative braking amount, during the torque control phase, the inertia control phase, and the transmission completion control phase.