METHOD AND APPARATUS FOR CONTROLLING ENGINE CLUTCH OF HYBRID VEHICLE

摘要

Disclosed are an engine clutch control apparatus of a hybrid vehicle and a method thereof. The invention executes transmission logic when an engine clutch is determined to be establishing a completely direct connection after checking the direct connection state of the engine clutch while or before changing the speed when setting the power-on downshift transmission in response to a driver′s acceleration request while the vehicle is operating in an EV running mode with a motor as the only driving force to fundamentally eliminate the transmission shock caused by executing the transmission while the engine clutch is in a direct connection for increasing the fuel economy and the transmission quality while ensuring the safety of the vehicle. [Reference numerals] (101) Receive a power-on downshift transmission reqeust; (103) Generate a transmission inhibition signal and generate and deliver an engine clutch direct connection request signal; (105) Directly connect an engine clutch and inhibit transmission; (107) During downshift transmission?; (109) Is the engine clutch at a transmission start point in an open state?; (111) Engine clutch control pressure >= Predetermined pressure ?; (113) Is a transmission section a certain section within a transmission inhibition signal filtering section?; (115) Is a transmission section a certain section within a transmission inhibition signal filtering section?; (117) Set a completely direct connection flag of the engine clutch as '1'; (119) Set the transmission inhibition signal as '0'; (121) Perform the transmission; (123) Set the completely direct connection flag of the engine clutch as '0'; (AA) Start; (BB) End