8
The burning mixture of air and fuel forces the piston downward during the IGNITION stage of engine operation.
Added 9/12/2015 5:51:29 AM
This answer has been flagged as incorrect.
Confirmed by
jeifunk [9/12/2015 8:47:59 PM], Flagged by
s c o u t [10/29/2025 10:12:39 AM]
3
The burning mixture of air and fuel forces the piston downward during the power stage of engine operation.
Added 254 days ago|10/29/2025 10:12:37 AM
This answer has been confirmed as correct and helpful.