Patent ID: 6912989

Claim:
A fuel injection control device for a direct fuel injection engine, comprising: a fuel injection valve configured and arranged to directly inject a first fuel stream per cycle into a combustion chamber; at least one sensor configured and arranged to determine at least one engine operation parameter that affects formation of a stratified air-fuel mixture inside the combustion chamber; and a controller configured to selectively control the fuel injection valve to use a first fuel injection timing when the controller determines that a stratified air-fuel mixture will be difficult to form during a second fuel injection timing based on a determination of the engine operation parameter by the at least one sensor, the first fuel injection timing being set to control the injection valve to inject the first fuel stream during an intake stroke while a piston in the combustion chamber is approximately at an intake top dead center position such that a majority of the first fuel stream injected from the fuel injection valve is received inside a cavity formed on the piston.