Patent ID: 6536747
Filing Date: 2003-03-25
Classification: F02M

Abstract:
A carburetor for an internal combustion engine comprising:a body; a fuel-and-air mixing passage extending through the body, the mixing passage having an inlet, an outlet, and a venturi disposed between the inlet and outlet; a throttle valve disposed within the mixing passage between the venturi and the outlet to control flow through the mixing passage; a low speed fuel nozzle communicating with the mixing passage adjacent the throttle valve when it is closed; an air bleed line communicating between an inlet port and the low speed nozzle, the inlet port communicating with atmosphere, the low speed nozzle communicating with the mixing passage between the outlet and the throttle valve; and an air bleed shut-off valve in the air bleed line having a closed position preventing air flow to the low speed nozzle through the air bleed line for cold starting of the combustion engine and an open position for hot idle and high speed operating conditions at the combustion engine.