듀얼 모드 하이브리드 자동차의 모드 변환시 토크 변화 저감을 위한 제어 알고리즘에 대한 연구

다국어 초록 (Multilingual Abstract)

In this study, mode change characteristics of a dual mode power split type hybrid electric vehicle were investigated, and a control algorithm was proposed to minimize the torque variation of the output shaft during the mode change. To analyze the transient characteristics during mode change, dynamic models for the planetary gear, engine, motor-generator, battery and vehicle were established, and a performance simulator for the dual mode power split transmission hybrid electric vehicle was developed. The simulator was used for the mode changes : EV mode → input split mode, input split mode → compound split mode. In the control algorithm, the MG1 torque was controlled to minimize the torque variation of the output shaft for the mode change from the EV mode to the input split mode. For the mode change from the input split mode to the compound split mode, the engine was controlled by the motor torque together with the slip control of the clutch/brake to reduce the speed difference between both clutch side and thereby reduce the torque variation of the output shaft.