Carburetor and fuel supply system
AssigneeHarold Phelps, Inc.
InventorHarold E. Phelps
Life of this patent
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Abstract
A carburetor and fuel feed device for small internal combustion engines incorporating a pumping section which receives fuel from a supply and delivers the required amounts for the range of operation between high and low speed operation with any excess being returned to the source of supply. A control device is employed which permits deceleration from high to low speed operation without flooding by instantaneously preventing the supply of fuel for high speed operation in response to movement of the throttle valve to an idle or low speed position.
Claims11
A carburetor for operating an engine in all positions of the latter, the combination of;
- a housing, a mixing passage formed in said housing for supplying a mixture of fuel and air to the engine, a throttle valve in said passage for controlling the supply of air and fuel mixture to the engine, a pump in said housing having an outlet communicating with a return line for returning fuel to a source of fuel supply, said return line being completely unrestricted between said pump and said source for the free flow of fluid, an idle metering system communicating with said return line to receive fuel therefrom and deliver fuel to the mixing passage downstream from the throttle valve for operating the engine in idle speed range, a main metering system communicating with said return line for delivering fuel to the mixing passage for operating the engine in a higher speed range, valve means in said main metering system movable between first and second positions to open and close, respectively, the supply of fuel to said mixing passage, and control means in said housing operable upon movement of said throttle valve to its closed position to move said valve means to said second position.
Dependencies are inferred from the claim text.