Marine Diesel Engine

Definition

A Marine Diesel Engine is a heat engine that uses the heat of compression to initiate ignition to burn the fuel that has been injected into the combustion chamber.

Types

1. Slow Speed (2-Stroke):

   • Directly coupled to the propeller (no gearbox).
   • Massive size (up to 4 stories high).
   • Highly efficient (low SFOC).
   • Used in Bulkers, Tankers, and Container Ships.

2. Medium Speed (4-Stroke):

   • Connected via a gearbox.
   • More compact but less efficient than 2-stroke.
   • Used in Cruise ships, Ferries, and for generating electricity (Auxiliary Engines / Generators).

Main Components

• Bedplate & A-Frame
• Cylinder Liners & Heads
• Pistons & Connecting Rods
• Crankshaft