Scavenging methods

Cross-flow scavenging, loop scavenging, uniflow scavenging. The uniflow one is the most efficient scavenging system but requires an exhaust valve in the cylinder head.

Uniflow scavenging – A scavenging system where the incoming air enters at the lower end of the cylinder and leaves at the top. The outlet at the top of the cylinder usually consists of a large valve.

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