Patent ID: 7464687

Claim:
A fuel injection control method for a direct-injection-type internal combustion engine having a fuel injection valve for directly injecting fuel into a cylinder of the internal combustion engine and a piston having a piston crown with a curved wall guide for guiding fuel spray injected from said fuel injection valve, said curved wall guide on said piston crown including an arc-shaped wall extended from a circumference side of said piston crown on a fuel injection valve installation side with respect to the center of said piston crown to a center side thereof, the fuel injection control method comprising controlling said fuel injection valve to inject a first fuel spray portion distributed in a direction of a spark plug provided at a cylinder head and a second fuel spray portion distributed in a direction of said curved wall guide on said piston crown at a latter half of a compression stroke when said internal combustion engine is in a low-load condition so that said second fuel spray portion reaches a vicinity of said spark plug along said curved wall guide.