Engines

TYPE OF ENGINES

• Depends on fuel• Depends on location • Depends on working principles

TWO STROKE PETROL ENGINE• Piston moves down

transferring fuel-air mix to cylinder and ejecting exhaust• Piston moves up -

compression and ignition. Suction of new mix in the sump

[Goring, L.1990, Marine inboard engines: petrol and diesel, London: Adlard Coles]

LOOP SCAVENGING

[Goring, L.1990, Marine inboard engines: petrol and diesel, London: Adlard Coles]

How two stroke engine work

FOUR STROKE CYCLE

[Goring, L.1990, Marine inboard engines: petrol and diesel, London: Adlard Coles] Two stroke vs. four stroke

Volume-Pressure diagram

[Calder, N, 1996, Marine Diesel Engines, Shrewsbury: Waterline]

TWO STROKE DIESEL

First stroke[Goring, L.1990, Marine inboard engines: petrol and diesel, London: Adlard Coles]

TWO STROKE DIESEL

Second stroke[Goring, L.1990, Marine inboard engines: petrol and diesel, London: Adlard Coles]

How marine engines are different from others?

• Down rated 10% or less• Installation considerations• Materials • Cooling system• Gearing