Patent ID: 6227165
Filing Date: 2001-05-08
Classification: F02B,F02D,Y02T

Abstract:
A two cycle crankcase compression internal combustion engine comprised of an engine body that defines a cylinder bore in which a piston reciprocates to form a combustion chamber, said cylinder bore being provided with at least one scavenge port and at least one exhaust port that are opened and closed by the reciprocation of said piston in said cylinder bore, a fuel injector mounted for spraying fuel directly into said combustion chamber, and a control system for controlling the fuel injection timing so that the beginning of fuel injection is initiated at a time when said exhaust port is still open and which point is determined at least in part by the actual air flow velocity within said combustion chamber so as to improve mixing of the injected fuel with the air within said combustion chamber and to insure that unburned fuel will not reach said exhaust port due to such air flow velocity within said combustion chamber before said exhaust port closes.