Patent ID: 11959428
Assignee: ETHANOL BOOSTING SYSTEMS, LLC
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC F  Y | IPC F

Claim 30:
31. A spark ignition engine having port fuel injectors and direct fuel injectors;
wherein the port fuel injectors and direct fuel injectors introduce a same fuel into the spark ignition engine;
wherein the same fuel that is introduced into the spark ignition engine comprises gasoline;
wherein at an earliest time in cold start, the spark ignition engine is fueled with direct fuel injection and port fuel injection;
wherein at an earliest time in cold start, more fuel is introduced by direct injection than port injection;
wherein following the earliest time in cold start, port fuel injection is introduced;
wherein stop-start engine operation is used during deceleration and idling;
wherein in stop-start operation, the spark ignition engine is fueled with direct fuel injection at an end of engine shutdown;
wherein in stop-start operation, the spark ignition engine is fueled with direct fuel injection when it is restarted;
wherein during at least part of a drive cycle, a relative amount of fueling provided by port fuel injection increases as the spark ignition engine warms up; and
wherein information about temperature is employed in controlling an amount of port injection that is used.