Control method and control system for dual-clutch transmission of hybrid electric vehicle

Abstract

The present invention provides a control method for a dual-clutch transmission of a hybrid electric vehicle, comprising: determining whether the vehicle enters a powerless downshift state through a transmission controller; when the first determining step determines that the vehicle has entered a powerless downshift state , it is determined by the transmission controller whether the transmission including the first input shaft, the second input shaft and the output shaft enters the torque phase; when it is determined that the transmission has entered the torque phase, the calculation is used to compensate the gear ratio based on the completion percentage of the torque phase varying compensation torque for varying regenerative braking force; and, compensating for regenerative torque of the electric motor by applying compensation 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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