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  2. Carburetor - Wikipedia

    en.wikipedia.org/wiki/Carburetor

    A 'power valve', which is a spring-loaded valve in the carburetor that is held shut by engine vacuum, is often used to do so. As the airflow through the carburetor increases the reduced manifold vacuum pulls the power valve open, allowing more fuel into the main metering circuit.

  3. Choke valve - Wikipedia

    en.wikipedia.org/wiki/Choke_valve

    Most choke valves in engines are butterfly valves mounted upstream of the carburetor jet to produce a higher partial vacuum, which increases the fuel draw. [ 1 ] In heavy industrial or fluid engineering contexts, including oil and gas production, a choke valve or choke is a particular design of valve with a solid cylinder placed inside another ...

  4. Float chamber - Wikipedia

    en.wikipedia.org/wiki/Float_chamber

    Float chamber (left) of an updraught carburettor, showing the float (4) and valve (5). A float chamber is a device for automatically regulating the supply of a liquid to a system. It is most typically found in the carburettor of an internal combustion engine , where it automatically meters the fuel supply to the engine.

  5. Pressure carburetor - Wikipedia

    en.wikipedia.org/wiki/Pressure_carburetor

    This valve controls the rate at which fuel can enter the pressure carburetor. Inside the barrel, downstream of the throttle sits the discharge valve, which is a spring-loaded valve operated by fuel pressure that controls the rate that fuel is discharged into the barrel. Some pressure carburetors had many auxiliary systems.

  6. Bendix-Stromberg pressure carburetor - Wikipedia

    en.wikipedia.org/wiki/Bendix-Stromberg_pressure...

    A floatless pressure carburetor is a type of aircraft fuel control that provides very accurate fuel delivery, prevents ice from forming in the carburetor and prevents fuel starvation during negative "G" and inverted flight by eliminating the customary float-controlled fuel inlet valve. Unlike the float-type carburetor fuel system that relies on ...

  7. Manifold vacuum - Wikipedia

    en.wikipedia.org/wiki/Manifold_vacuum

    The butterfly valve often contains a small "idle bypass", a hole that allows small amounts of fuel/air mixture into the engine even if the valve is fully closed, or the carburetor has a separate air bypass with its own idle jet. If the engine is operating under light or no load and low or closed throttle, there is high manifold vacuum.

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