1. Marine Engine Systems
Merchant Marine Training Centre

2. What are the Marine Engine Systems?
1. Starting Air System
2. Fuel Oil System
3. Cooling Water System
4. Lubricating Oil System
Merchant Marine Training Centre

3. Starting Air System
Merchant Marine Training Centre

4. Usually, Two ‘air start’ compressors supply air to the ‘air receivers’.
Air Receivers
Merchant Marine Training Centre

5. Automatic Valve – Stops air going back to the air receivers
The air distributor usually has many pilot valves, one for each cylinder. the distributor opens the air start valves .
Automatic Valve – Stops air going back to the air receivers
Merchant Marine Training Centre

6. The air start valve is located in the cylinder head
The air start valve is located in the cylinder head. When it is opened by the distributor, compressed air goes into the cylinder and forces the piston down.
Merchant Marine Training Centre

7. Merchant Marine Training Centre

8. Starting Air Valve
Air distributor
Merchant Marine Training Centre

9. Merchant Marine Training Centre

10. Merchant Marine Training Centre

11. Merchant Marine Training Centre

12. Fuel Oil System
Merchant Marine Training Centre

13. Shut off non return valves Fuel Oil heater Burners Make-up water pump
Fuel Oil header
Fuel Oil filters
Shut off valves
Fuel Oil pumps
Shut off non return valves
Fuel Oil heater
Burners
Make-up water pump
A) Fuel Oil header (Line)
B)Fuel Oil filters
C) Shut off valves
D) Fuel Supply pumps
E) Non return valves
F) Fuel Oil heater
G) Burners
H) Make-up water pump
Merchant Marine Training Centre

14. Merchant Marine Training Centre

15. Fuel Oil System process
First, fuel oil comes from the fuel tank and passes through filters before it enters the supply pumps.
From the supply pumps the fuel passes through more filters
Fuel is pumped via a meter so that the quantity of fuel used can be observed
Please note: Noun / Verb
Merchant Marine Training Centre

16. Fuel Oil System process (cont.)
Fuel then passes to a buffer tank where it mixes with fuel that has returned from the engine
From the buffer tank fuel oil circulating pumps pump it to the heaters and to the engine
The oil is heated and the temperature of the oil is controlled by a viscosity measuring device.
Please note: Noun / Verb
Merchant Marine Training Centre

17. Fuel Oil System process (cont.)
After the heater and before finally going to the main engine inlet rail the fuel passes through more filters to ensure that there is no dirt which could damage the fuel pumps, injectors and cylinder liner.
From the main engine inlet rail the fuel enters the fuel pump (one per cylinder). The fuel pump delivers the fuel to the fuel injector.
If too much fuel is delivered to the fuel pump, the excess fuel is pumped back to the buffer.
Please note: Noun / Verb
Merchant Marine Training Centre

18. Merchant Marine Training Centre

19. The End
Merchant Marine Training Centre