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intake stroke
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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 showing three stages in the operation of a Wankel rotary engine: intake of fuel-air mixture, ignition by spark plug, and exhaust release, with labeled parts and rotary motion indicated.
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intake stroke

internal combustion
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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.

The intake stroke is a crucial part of the internal-combustion engine cycle. During this stroke, the piston moves down, and the inlet valve opens, drawing a mixture of fuel and air into the cylinder. This process creates a partial vacuum within the cylinder, facilitating the intake of the combustible mixture. The intake stroke is the first of the four strokes in a typical four-stroke cycle, preceding the compression, power, and exhaust strokes. This cycle, often referred to as the Otto cycle, was pioneered by Alphonse Beau de Rochas and Nikolaus Otto.12

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  1. intake stroke
  2. four-stroke cycle
  3. camshaft
  4. intake manifold

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