Diesel engine ships use internal combustion engines that convert diesel fuel into mechanical energy for propulsion. Key engine parts include cylinders, pistons, crankshafts, fuel injectors, and turbochargers. These components work together to ensure efficient power generation and smooth operation.

Diesel Engine Ships: Size ranges from small vessels (under 50 meters) to large ships (over 300 meters). Engine power varies from 500 kW to over 80,000 kW. Fuel grade typically uses marine diesel oil (MDO) or heavy fuel oil (HFO). Viscosity of HFO ranges from 180 cSt to 700 cSt at 50°C. Buoyancy is determined by hull design and displacement tonnage. Common materials include steel for hulls and cast iron or steel for engine blocks.

Engine Parts: Cylinder bore sizes range from 200 mm to over 1,000 mm. Piston materials include aluminum alloys or steel. Crankshafts are forged steel with tensile strengths exceeding 800 MPa. Bearings use bronze or Babbitt metal. Lubricating oil viscosity ranges from SAE 30 to SAE 50. Cooling systems use freshwater or seawater with corrosion-resistant materials like cupronickel.