Boost fuel enricher
OwnerHector H. Velez-Velezinventor
Life of this patent
Estimating the term…
Abstract
The boost fuel enricher is used with internal combustion engines, either carbureted or fuel-injected, that are equipped with compressors, i.e., turbocharged or supercharged, in order to enrich the air/fuel ratio when the engine is under boost. The boost fuel enricher is a diaphragm pressure valve with an adjustable throat. The diaphragm is subject to atmospheric pressure on one side, and senses inlet air pressure in the air intake passage on the other side. When inlet air pressure exceeds atmospheric pressure, the valve opens to admit additional air-fuel mixture into the air intake passage through a venturi in the air intake passage. The throat is made adjustable by sliding block valves in the fuel passage.
Claims8
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.
A boost fuel enricher in combination with a carburetor adapted for attachment to an internal combustion engine having a compressor for applying a boost pressure to the engine, the boost fuel enricher comprising:
- a carburetor having an air horn, a mouth defining an entrance to the air horn, a venturi defined in the air horn, a fuel bowl, a discharge tube connecting the fuel bowl to the venturi, and a bowl vent tube connected between the mouth of the air horn and the fuel bowl;
- 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 connected to the fuel bowl of said carburetor;
- and
- wherein said discharge tube is connected to the venturi of said carburetor, 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 in the fuel bowl exceeds atmospheric pressure.
Dependencies are inferred from the claim text.