Patent ID: 8229652
Filing Date: 2012-07-24
Classification: F02B,F02D,Y02T

Abstract:
1. A method of controlling a cylinder injection type internal combustion engine in which fuel is supplied directly into a combustion chamber by a fuel injection apparatus situated adjacent to an intake valve, wherein during a fast idle period of the engine, said method comprises: controlling the fuel injection apparatus to inject fuel on an intake stroke; setting a lift of the intake valve that is less than a lift of the intake valve that is set when the engine is operating in a heavy load; setting a start of an opening timing of the intake valve to a point that coincides substantially to a fuel injection timing and is on a retard angle side relative to top dead center of the intake stroke; and controlling a closing timing of an exhaust valve to a point that is on said retard angle side relative to top dead center of the intake stroke, and is before said start of said opening timing of the intake valve, such that burned fuel gas is sucked back into the combustion chamber; wherein said intake valve opening timing and said exhaust valve closing timing are gradually retarded during an initial operation of said engine from a cold start initial timing to 25 degrees past the cold start initial timing.