| 摘要 |
PROBLEM TO BE SOLVED: To improve startability in starting an engine while suppressing resonance caused by a damper, and facilitate an engine speed quickly with an autonomous revolution of the engine.SOLUTION: In cranking with a motor-generator to increase an engine rotation speed NE, a K0 clutch is slip-engaged, increasing a resonance rotation speed reslp, and therefore it is possible to increase a starting rotation speed NE1, thus improving startability of the engine. Further it is possible to start the engine at a relatively high rotation speed, gaining large torque from the beginning of the start and enabling the engine rotation speed NE to rise quickly to a target rotation speed NE2. At starting the engine, the K0 clutch is completely engaged, lowering a resonance radiation speed reon and causing the starting rotation speed NE1 to exceed the resonance radiation speed reon, and therefore it is possible to raise the engine rotation speed NE smoothly. |
