Marine Internal Combustion Engines

This subject is the most important subject, as it will always keep coming in future. This subject should be known just like your family history, as it is the backbone of Marine Engineering. Each & every single information in this subject is very very important. Following are the important topics in this subject:

1. 4-stroke & 2-stroke principles - constructional difference in them, suitability, advantages, disadvantages of both, scavenging systems & scavenge pumps, air movement inside cylinder, air turbulence, methods of producing air movements, types of combustion chambers, conditions for efficient combustion, fuel pumps & motoring devices, jerk & common rail fuel injection systems, fuel selection, fuel quality, ignition delay, after burning, atomization, penetration, system for burning heavy fuel oil in slow & medium speed marine engines, methods for improving combustion efficiency & plant efficiency, methods of supercharging, turbochargers, pulse & constant pressure type, their relative merits in highly rated marine propulsion engines, cooling media for piston & cylinder liner, relative merits, coolant conveying mechanism & systems.

2. Constructional details & design considerations for principal components - liner, cylinder head, piston, piston rod, cross head, connecting rod, crank shaft, camshaft, main bearing, A-frame, tie rod, bed-plate, gear drive, chain drive, lost motion coupling, etc., calculations for heat transfer, selection of materials welded construction for bed-plates, frames, etc., liner wear & lubrication, choice of lubricating oil, lubricating systems, crank shaft corrosion, contamination & purification of lubricating oil, starting & manoeuvring systems.

3. Taking of indicator & draw cards, fault detection, power balancing, methods to improve efficiency & fuel consumption.

4. Descriptions of different makes of diesel engines in marine use viz. MAN, Sulzer, Doxford, etc.

5. Care & maintenance of ignition systems, cooling systems, lubricating oil systems, piston ring & bearing, crank shaft deflection & alignment, causes & prevention of crankcase explosion, scavenge fires, starting air line explosion, safety fittings, fire fighting.

6. Automation in Diesel engine plant & safety devices, cooling control, bridge control, safety interlocks, wrong way alarm.