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intake valve
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internal-combustion engine: four-stroke cycle Diagram showing the four-stroke cycle of a typical diesel engine, with labeled stages: intake (air enters), compression (air is compressed), power (fuel ignites and pushes piston down), and exhaust (gases exit). Diagram of a gasoline engine showing a cross-section of a piston and cylinder. Key parts such as the spark plug, valves, camshaft, piston, connecting rod, and crankshaft are labeled. 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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intake valve

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internal-combustion engine: four-stroke cycle
internal-combustion engine: four-stroke cycle An internal-combustion engine goes through four strokes: intake, compression, combustion (power), and exhaust. As the piston moves during each stroke, it turns the crankshaft.

An intake valve is a crucial component in internal-combustion engines. Its primary role is to control the flow of the air-fuel mixture into the engine's cylinders. During the intake stroke, the piston moves down, creating a vacuum that draws the mixture into the cylinder through the open intake valve. The camshaft, driven by the crankshaft, precisely times the opening and closing of these valves to ensure the engine runs smoothly and efficiently. The intake valve closes as the piston begins to move upward, compressing the mixture before ignition.12

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3 Britannica Sources
  1. camshaft: Top Questions
  2. gasoline engine - Valves , pushrods , and rocker arms
  3. camshaft

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