Four Stroke Diesel Engine

In this topic you will learn about four stroke diesel engine working principle and parts of the four stroke diesel engine. This is also known as an Auxiliary Engine onboard the ship.

An auxiliary engine aboard a ship plays a crucial role in ensuring the vessel’s smooth operation. Here’s a comprehensive guide to help you understand this essential component

1. What Is a Marine Auxiliary Engine?
   • Ships require two types of power:
     • Propulsion Power: This is the force needed to move the ship through water. It’s generated by the ship’s primary engine (often a diesel engine).
     • Electrical Power: This powers all the ship’s electrical devices and appliances, including lights, air conditioning, navigation systems, and more.
   • The marine auxiliary engine is responsible for providing electrical power. It acts as the ship’s life support system, ensuring that everything onboard functions smoothly.
2. Purpose of an Auxiliary Engine on Ships:
   • The auxiliary engine supplies power to everything except the ship’s movement.
   • Key functions include:
     • Electrical Systems: Running lights, air conditioning, communication equipment, and navigation systems.
     • Equipment Operation: Powering cranes, pumps, winches, and other machinery.
     • Life Support: Ensuring crew comfort and safety.
   • Without the auxiliary engine, a ship would be like a massive metal structure floating aimlessly in the water.
3. Components of a Marine Auxiliary Engine:
   • Stator: Coils of electrical conductors wound around an iron core.
   • Rotor: A large rotating magnet placed inside the stator.
   • Field: Coiled conductors that receive a direct current (DC) input.
   • Armature: Large coiled wiring that receives the alternating current (AC) output.
   • Prime Mover: The primary engine (usually diesel-powered) that generates the DC to run the auxiliary engine.
   • The transfer of power from the engine to the ship’s power distribution center occurs through these components.