| 摘要 |
During engine startup and engagement of a transmission clutch in response to an EV†’HEV mode-switch demand (t1), the transmission clutch is engaged at t3-t4, during engine startup which precedes initiation of self-sustaining running by the engine at t6. During the clutch engagement from t3-t4, as may be clearly seen from the waveform of the engine torque (Te) in t3-t4, during startup at t2-t6 which precedes self-sustaining running by the engine, high engine torque is not input to the transmission clutch, and no large torque differential arises in relation to the torque at the output side of the transmission clutch, which during EV operation is a low value about equal to the low motor torque of an electric motor. Additionally, due to cranking at t2-t6 during engine startup, the input/output rotation difference ”N of the transmission clutch at t3 is small, and when the transmission clutch is engaged at t3, engagement of the transmission clutch may be carried out with reduced shock, as the input/output torque differential and the input/output rotation difference are small. |
