Patent ID: 11965473
Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC F  Y | IPC F

Claim 2:
3. A control method for an internal combustion engine, wherein
the internal combustion engine includes:
a port injection valve that injects fuel into an intake passage;
a direct injection valve that directly injects fuel into a cylinder without passing through the intake passage; and
a forced-induction device that performs forced induction of intake air,
a ratio of an amount of fuel injected from the port injection valve with respect to a total amount of fuel supplied for one fuel combustion in the cylinder is defined as a port injection ratio,
the control method comprises, in a case in which a condition is satisfied that the forced-induction device is in an operation state in which the forced-induction device performs forced induction and the internal combustion engine is in an engine operation region in which a valve overlap period is greater than zero, by setting the port injection ratio to be small and delaying a start timing of fuel injection from the port injection valve as compared with a case in which the condition is not satisfied, using a time later than the valve overlap period as a start timing of fuel injection from the port injection valve, and setting the port injection ratio so that an amount of fuel injected from the port injection valve is less than or equal to an allowable port injection amount that is an amount of fuel that can be injected from the port injection valve in a period from the start timing until closing of an intake valve.