Patent ID: 7487756
Filing Date: 2009-02-10
Classification: F02B,F02D,Y02T

Abstract:
1. A direct fuel injection-type spark ignition internal combustion engine which executes a stratified charge combustion by vaporizing the fuel while flying after having been injected into the cylinder in the compression stroke to form a mixture in a portion in the cylinder, and by igniting and burning said mixture by positioning the spark gap of a spark plug in said mixture at the ignition timing before the compression top dead center, wherein when the fuel is required in an increased amount and the air-fuel ratio of said mixture formed by the fuel injected by the first fuel injection near the ignition timing becomes too rich, part of the required amount of fuel is injected by a second fuel injection in the compression stroke separately from said first fuel injection and when the amount of fuel injected by said second fuel injection becomes larger than a preset amount, said second fuel injection is brought to the side in advance of said first fuel injection and when the amount of fuel injected by said second fuel injection becomes smaller than said preset amount, said second fuel injection is brought to the side delayed behind said first fuel injection.