Importance

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Abstract

A fuel economizer system for an internal combustion engine comprising a fuel supply tank, a main fuel supply line connecting the tank to the carburetor of the engine, and a fuel pump in the supply line for delivering fuel to the carburetor, an adjustable fuel metering valve positioned in the fuel supply line between the fuel pump and the carburetor, and means for automatically adjusting the metering valve in response to changes in load conditions on the engine to provide minimum fuel pressure and fuel to the carburetor inlet during idle and no-load conditions, while increasing the fuel pressure and amount of fuel supplied to the carburetor in response to increases in the load condition on the engine. During operation of the engine, the position of the metering valve is automatically adjusted by a diaphragm motor which is operatively connected to the intake manifold of the engine whereby changes in vacuum pressure in the intake manifold move the valve to increase or decrease the supply of fuel to the carburetor. The metering valve includes a rotary valve plug having a generally rectangular fuel passageway therethrough which is rotatably positioned from a full open condition during acceleration and heavier load conditions on the engine, to a maximum, partially closed condition during idle and minimum load conditions on the engine.

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First Claim