Scavenging in a two-stroke marine diesel engine serves what function?

Prepare for the Engineman EN A School Test 1. Utilize flashcards and multiple choice questions with detailed explanations to boost confidence and readiness for the test.

Scavenging is about clearing exhaust and filling the cylinder with fresh air for the next cycle. In a two-stroke diesel, there isn’t a separate intake stroke, so as the piston moves, exhaust gases exit through the exhaust ports while fresh air is admitted through scavenging ports. This air pushes out most of the burnt gases and fills the cylinder so there’s enough oxygen for the next combustion event when fuel is injected and compressed. This process improves the cylinder’s oxygen content and overall efficiency. It’s not primarily for cooling the piston, igniting the fuel-air mix, or lubricating the crankshaft—those functions are handled by their respective systems.