Patent ID: 7089892

Claim:
A straddle seat type vehicle, comprising: a straddle type seat; a two-cycle internal combustion engine; and a chassis supporting the seat and the engine, the engine including: a cylinder having an internal cavity of substantially cylindrical shape and defining a central cylinder axis; a cylinder head disposed on one end of the cylinder; a piston disposed within the internal cavity of the cylinder; a crankcase disposed on an end of the cylinder opposite the cylinder head and in fluid flow communication with the cylinder; an air inlet for introducing air into the crankcase, the air flow out of the inlet and into the crankcase defining a central airflow axis; and a crankcase fuel injector passing through a wall of the crankcase for injecting fuel in the crankcase in a fuel jet having a central jet axis, the jet axis being in a direction generally opposite the direction of the central airflow axis when viewed in a direction from the cylinder head towards the crankcase and when viewed in a direction perpendicular to the central cylinder axis, wherein all of the fuel for the combustion, at all loads is injected at a position below the top of the piston, as measured at a bottom dead center position of the piston.