Patent ID: 6343585
Filing Date: 2002-02-05
Classification: F01L,F02B,F02D,F02F,F02M,F16H,Y02T,Y10T

Abstract:
An engine comprising:an engine cylinder provided with an air intake valve through which air is supplied into said engine cylinder; an injector having a fuel injection port which port is directed towards an interior of said engine cylinder; a control unit connected to said air intake valve and to said injector, wherein said control unit changes an air intake amount by controlling an opening degree of said air intake valve, and controls an air/fuel ratio by changing an amount of fuel supplied by said injector; and an exhaust valve provided in said engine cylinder, wherein said control unit controls said intake valve and said exhaust valve so that an opening period of said intake valve is overlapped with an opening period of said exhaust valve at least during a portion of the opening period of said intake valve, and wherein the period of the overlap in a high-output stage of the engine is longer than that in a low-output stage of the engine.