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Throttle Valves

Throttle Valves

A Throttle Valve is a device found on an automobile engine. The flow of fuel and, thereby, the amount of power the engine makes, is directly controlled by this valve. On an engine with a carburetor, the throttle valve is also referred to as the butterfly. As the gas pedal is depressed, the throttle or butterfly valve opens, allowing more air and fuel to enter the combustion chamber and resulting in an increase of power. In a fuel injection system, this valve controls the flow of air only as the vehicle's on-board computer regulates the fuel flow.