Patent ID: 7523922

Claim:
A carburetor for a stratified charge two cycle engine comprising a body, an intake passage extending through the body and comprising a choke bore, a venturi, and a throttle bore, a choke valve positioned within the choke bore and having a non-uniform diameter profile, wherein the choke bore having an inlet profile and a profile in a plane parallel to an intake flow direction that are shaped to substantially match the choke valve profile, wherein a leading section of the choke valve adjacent an inlet of the intake passage is semi-circularly shaped, wherein a trailing section of the choke valve has a truncated triangle shape, and a throttle valve positioned within the throttle bore and having a leading edge that overlaps with a trailing edge of the choke valve at wide-open-throttle operation to separate the intake passage into an air intake passage above the choke and throttle valves and an air/fuel intake passage below the choke and throttle valves.