Assertion: engine's piston | /r/CapableOf | travel toward top dead center
Facets:
Source sentences:
text: The Atkinson cycle modifies that process by leaving the intake valves open for the first moments of the compression stroke, as the piston travels toward top dead center, which effectively lowers the compression ratio of, say, 10:1 to something more like 8:1, or so.
text: This early (before the spark plug fires) ignition of fuel creates a shock wave throughout the cylinder as the burning and expanding fuel-air mixture collides with the piston that is still traveling towards top-dead-center.