outstroke
Definition
Noun: 1. The outward movement of a piston in an engine: Specifically, the stroke during which the piston moves away from the cylinder head and toward the crankshaft, typically corresponding to the power or exhaust phase in a four-stroke cycle.
Usage
The term "outstroke" is a technical noun used primarily in mechanical and automotive engineering contexts to describe a specific part of an engine's operation cycle. - It is used to identify the direction of piston movement relative to the crankshaft. - It often appears in explanations of engine mechanics, diagrams, or repair manuals.
Examples
- Noun:
- During the outstroke, the expanding gases push the piston down, converting thermal energy into mechanical work.
- The mechanic explained that the problem occurred on the outstroke of the third cylinder.
- In this model, the intake valve closes just before the outstroke begins.
Advanced Usage
- "to complete an outstroke": to finish the piston's outward movement.
- The engine must complete an outstroke and an instroke for each full cycle of a given cylinder.
Variants and Related Words
- Instroke (n): The opposite movement; the stroke of an engine piston moving away from the crankshaft and toward the cylinder head.
- Stroke (n): A single, complete movement of a piston in either direction.
- Power stroke (n): In a four-stroke engine, the outstroke that delivers power from ignited fuel.
- Exhaust stroke (n): In a four-stroke engine, the outstroke that expels burnt gases.
Synonyms
- Downstroke: Often used synonymously in vertical engine configurations where the outstroke is a downward movement.
- Expansion stroke: Specifically refers to the power-generating outstroke.
Antonyms
- Instroke: The inward movement of the piston.
Noun
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the stroke of an engine piston moving toward the crankshaft
