| 摘要 |
IN AN INTRA-CYLINDER INJECTION TYPE ENGINE, A FIRST FUEL CUT-OFF STARTING ROTATIONAL SPEED, A FIRST RETURN ROTATIONAL SPEED AND A FIRST TARGET IDLING SPEED IN A COMPRESSION STROKE INJECTION MODE, WHICH IS SUPERIOR IN BOTH COMBUSTION AND RESPONSIVITY, ARE SET AT LOWER SPEEDS THAN A SECOND FUEL CUT-OFF STARTING ROTATIONAL SPEED, A SECOND RETURN ROTATIONAL SPEED, AND A SECOND TARGET IDLING SPEED IN A SUCTION STROKE INJECTION MODE. DURING AN OPERATION IN THE COMPRESSION STROKE INJECTION MODE, A FUEL CUT-OFF MODE AND AN IDLE RUNNING OF THE ENGINE ARE PRACTICED AT A LOW ENGINE SPEED, TO IMPROVE THE FUEL ECONOMY WITHOUT CAUSING DETERIORATION OF COMBUSTION.
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