| 摘要 |
PROBLEM TO BE SOLVED: To absorb torque fluctuation generated in the engine output shaft to realize smooth travelling motion by an electric motor. SOLUTION: A hybrid car has two power sources, namely an internal combustion engine 1 and an electric motor 2 which are interconnected to drive each other. When a vehicle stops, the internal combustion engine 1 is stopped, and when the vehicle starts, the internal combustion engine 1 is started by torque of the electric motor 2. Taking notice of the change in torque fluctuation level of the internal combustion engine 1 due to the rotation angle of the engine- output shaft, an ECU 11 approximately calculates torque fluctuation components generated in the engine-output shaft using the tertiary or less components of sine function in relation to the order of torque fluctuation due to compression, expansion in the internal combustion engine 1. Further, the ECU 11 adds the calculated torque fluctuation components to a torque command value of the electric motor 2 in an antiphase to correct the torque command value. |
