Hi all,
I am a car laic trying to understand reasons for some design decisions. So far the best explanation I found for multiple valves is based on the assumption that valves must be round; then, to cover more area of a round cylinder head with circles, it's better to use more smaller circles.
My question to the group is, why do valves need to be round? With "D"-shaped valves there could be one intake and exhaust valve that has maximum possible flow.
Thanks!