One of the mysteries of the English language finally explained.
The stage of the cycle of an internal combustion engine in which the piston is driven outward by the expansion of gases.
- ‘Deactivation requires only 40 or so milliseconds and is timed to occur immediately after the power stroke so the disabled cylinder remains filled with exhaust gas.’
- ‘The result is that a portion of the following power stroke is wasted, trying to burn already deoxygenated exhaust.’
- ‘We really only want the top ring to seal against the cylinder wall primarily on the power stroke; on the other three strokes, it's just along for the ride.’
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