Control Method Of Dual Clutch Transmission For Hybrid Electric Vehicle And Control System For The Same

Abstract

A control method of a dual clutch transmission for a hybrid electric vehicle includes: determining, by a transmission controller, whether a vehicle has entered a power-off down-shift state; determining, by the transmission controller, whether a transmission including a first input shaft, a second input shaft, and an output shaft has entered a torque phase, when the first determining step determines that the vehicle has entered the power-off down-shift state; calculating a compensatory torque for compensating for a change in a regenerative braking force according to a change of a gear ratio in accordance with a completion percentage of the torque phase, when it is determined that a transmission has entered the torque phase; and compensating for regenerative torque of a motor by applying the compensatory torque.

Description

technical field [0001] The present invention relates to a control method and a control system for a dual-clutch transmission of a hybrid electric vehicle, which can effectively prevent a decrease in braking linearity due to power-off down-shift, and Effectively improves shift response in regenerative braking used to recharge the battery during braking. Background technique [0002] Recently, environmentally friendly vehicles such as electric vehicles and hybrid vehicles have been rapidly developed in response to concerns for environmental improvement. [0003] A hybrid vehicle refers to a vehicle equipped with a battery and an electric motor for a driving mode using electric energy, and an internal combustion engine for a driving mode like a general vehicle. [0004] When a battery is used to drive a vehicle such as a hybrid vehicle, various studies have been conducted for improving the efficiency of electric energy consumption. Among them, regenerative braking using elect...

AI Technical Summary

Problems solved by technology

[0005] In a power-off downshift state in regenerative braking of a hybrid vehicle, the braking force and shift response through shifting vary variously according to the brake pedal effort, and it is difficult to maintain the linearity of the braking force and shift response , and consequently, drivability deterioration

[0006] Specifically, in a hybrid vehicle with a dual-clutch transmission, it is difficult to control braking capability and shift response that vary considerably in torque phase and inertia phase during downshifting

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