What position are the inlet and exhaust valves on the power stroke?
What position are the inlet and exhaust valves on the power stroke? The valves are timed so the intake valve opens slightly before the piston reaches top dead center (TDC) on the exhaust stroke. Likewise, the exhaust valve is timed to close just after the piston starts down on the intake stroke. What happens to the intake and exhaust valves during compression stroke? As the piston travels back down the cylinder, the exhaust valve goes fully shut and the intake valve goes fully open and starts to shut. Compression stroke. The piston is at BDC and starts to travel up...