Patent ID: 7047934

Claim:
An internal combustion engine comprising: an engine body including a cylinder that defines a combustion chamber, an intake opening that faces the combustion chamber, and an intake passage in communication with the combustion chamber through the intake opening; a piston provided in the cylinder; an intake valve that opens and closes the intake opening; a throttle valve provided in the intake passage; and an injector arranged to inject fuel between the throttle valve in the intake passage and the intake opening, wherein an intake stroke, a compression stroke, an expansion stroke, and an exhaust stroke are repeated in this order; wherein a ratio of a volume of a portion that extends from the throttle valve in the intake passage to the intake opening, to a stroke volume of the cylinder is at most about 0.61; and a time at which fuel injection from the injector is terminated during an idling operation, is within a period of time after an intake stroke is terminated and before a subsequent intake stroke is begun.