SYSTEM AND METHOD FOR OPENING ENGINE CLUTCH OF HYBRID VEHICLE

摘要

A system and method for opening an engine clutch of a hybrid vehicle are provided. The method and system enhance fuel efficiency by saving a fuel injection amount based on a fuel injection time of an engine, by adjusting an input torque of an engine clutch to be zero using an HSG torque connected to the engine while reducing the fuel injection time into the engine from the time when the opening of the engine clutch starts to adjust.

主权项

1. A method for opening an engine clutch of a hybrid vehicle, comprising:
applying, by a controller, an opening control signal for an engine clutch to shift a hybrid electric vehicle (HEV) mode to an electric vehicle (EV) mode; driving, by the controller, a hybrid starter generator (HSG) with a torque converged with a friction torque of an engine while terminating fuel injection into the engine, when the opening of the engine clutch starts to adjust; and opening, by the controller, locked-up pressure of the engine clutch to open the engine clutch, when an input torque of the engine clutch becomes zero by converging a driving torque of the HSG connected to the engine to the friction torque of the engine.