Scavenging

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For other uses, see Scavenging (disambiguation).

Scavenging is the process of pushing exhausted gas-charge out of the cylinder and drawing in a fresh draught of air ready for the next cycle in automotive usage. This process is essential in having a smooth-running internal combustion engine. Modifying the exhaust system, (i.e. modifying the back pressure) can detract from the "ideal" scavenging effects, and reduce fuel efficiency and power.

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