Patent ID: 6311665
Filing Date: 2001-11-06
Classification: F02B,F02F,Y02T

Abstract:
A direct injection engine comprising:a piston having a cavity formed in its top surface;a spark plug located in the vicinity of the cavity; andan injector for injecting fuel toward the cavity in a compression stroke so that a mixture is locally distributed around the spark plug; anda swirl generator for producing a swirl within the combustion chamber;wherein the spark plug is located at a position in front of the injector in plan view; and the fuel injecting direction of the injector, spray penetration and swirl ratio are determined such that a direction of a fuel spray from the injector is varied during a fuel injection period and directed toward the spark plug when the pressure in a cylinder is low in the compression stroke, and the fuel spray is deflected away from the direction of the spark plug by the swirl as the pressure in the cylinder increases.