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throttle valve
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Labeled cross-sectional diagram of a V-type gasoline engine for an automobile, showing internal components such as pistons, crankshaft, camshaft, intake and exhaust valves, connecting rods, spark plugs, and intake manifold.
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throttle valve

mechanics
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Labeled cross-sectional diagram of a V-type gasoline engine for an automobile, showing internal components such as pistons, crankshaft, camshaft, intake and exhaust valves, connecting rods, spark plugs, and intake manifold.
V-type engine Cross section of a V-type engine.

A throttle valve is a crucial component in mechanical systems, particularly in engines, designed to control the flow of fluids like steam or gas and air. In internal-combustion engines, it specifically regulates the amount of vaporized fuel mixture delivered to the cylinders.12

The throttle valve operates within the carburetor, where it influences airflow. As air passes through a narrowed section called the throat, its speed increases, causing a drop in pressure. This pressure difference then draws fuel into the airstream. Adjusting the throttle valve changes the airflow, which in turn modifies the fuel-air mixture, thereby controlling the engine's power output.2

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