Assertion: engine's stroke | /r/CapableOf | push the piston
Facets:
value: downward
type: MANNER
Source sentences:
text: Power or working stroke: The pressure of the combustion gases pushes the piston downward, generating more work than it required to compress the charge.
text: The first stroke, the intake, pushes the piston down, pressurizing the fuel-air mixture in the combustion chamber.