Which of the following statements correctly describes the position of the intake and exhaust valves during most of the power sta
ge in a four-cycle gas engine? a. Both the intake valve and the exhaust valve are open.
b. The intake valve is open and the exhaust valve is closed.
c. The intake valve is closed and the exhaust valve is open.
d. Both the intake valve and the exhaust valve are closed.
While the fuel is burning in the cylinder, you want all the force of the expanding gases to push the piston down ... you don't want any of the gases or their pressure escaping.
If either of the valves was open, even just a crack, then part of the gases would go blooey out the valve, and some pressure would be lost that's supposed to be pushing the piston.
Which of the following statements correctly describes the position of the intake and exhaust valves during most of the power stage in a four-cycle gas engine?
A. The intake valve is closed and the exhaust valve is open.
B. The intake valve is open and the exhaust valve is closed.
C. Both the intake valve and the exhaust valve are closed.
D. Both the intake valve and the exhaust valve are open.
