top dead center
Definition from Wiktionary, the free dictionary
[edit] English
[edit] Noun
- (automotive) A position in the four-stroke combustion process wherein the piston is at the topmost point in its stroke. This can either be during the compression phase or the combustion phase.
- (automotive) The reference mark on a flywheel (and engine block) indicating the engine is in the top dead center position, when aligned.
