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Questions and Answers
Explain the 4-stroke scavenging process in an internal combustion engine.
Most modern four-stroke engines use crossflow cylinder heads and valve timing overlap to scavenge the cylinders.
What are the key stages of the 4-stroke scavenging process?
Scavenging is the process of replacing the exhaust gas in a cylinder of an internal combustion engine with the fresh air/fuel mixture (or fresh air, in the case of direct-injection engines) for the next cycle.
Why is the 4-stroke scavenging process important in internal combustion engines?
If scavenging is incomplete, the remaining exhaust gases can cause improper combustion for the next cycle, leading to reduced power output.
