Patent ID: 6786208
Filing Date: 2004-09-07
Classification: F02B,F02M,Y10S,Y10T

Abstract:
A boost fuel enricher for use with an internal combustion engine equipped with an inlet air compressor, the boost fuel enricher comprising:a valve housing having a fuel inlet, a fuel outlet, and a fuel passage defined between the fuel inlet and the fuel outlet, the fuel passage having a cross-sectional area defining a throat of the valve housing; a diaphragm valve with an integral piston disposed within said valve housing; a spring disposed within said valve housing and bearing against said diaphragm, the spring biasing said integral piston into the fuel passage in order to block fluid flow between the fuel inlet and the fuel outlet; a discharge tube connected to said fuel outlet; wherein the valve housing has a vent hole defined therein subjecting one side of said diaphragm to atmospheric pressure; wherein said fuel inlet is adapted for connection to a fuel bowl vented to air intake pressure in the engine; and wherein said discharge tube is adapted for connection to a venturi disposed in an intake air passage of the engine, said spring being biased to raise the integral piston in the fuel passage in order to permit fuel to flow through the valve housing and discharge into the venturi when pressure at the fuel inlet exceeds atmospheric pressure.