GAS POWER CYCLES Cycles: Otto, Diesel, Dual, Brayton - Calculation of mean effective pressure - Air standard efficiency - Comparison of cycles INTERNAL COMBUSTION ENGINES Classification - Components and their function - valve timing diagram and port timing diagram - actual and theoretical p-v diagram of two stroke and four stroke engines – carburettor - diesel pump and injector system - battery and magneto ignition system - principles of combustion and detonation in CI engines - lubrication and cooling systems - performance parameters and calculations.

1. COMPARSION OF OTTO, DIESEL & DUAL CYCLE

2. BRAYTON CYCLE WITH INTER COOLING

3. BRAYTON CYCLE WITH REHEATER

4. BRAYTON CYCLE WITH INTER COOLER, REHEATER &
REGENERATION

5. TWO STROKE S.I ENGINE
TWO STROKE C.I ENGINE

6. FOUR STROKE S.I ENGINE
FOUR STROKE C.I ENGINE

7. ENGINE COMPONENETS AND FUNCTIONS

8. FOUR STORKE (PETROL) S.I. ENGINE

9. VALVE TIMING DIAGRAM

10. FOUR STORKE (DIESEL) C.I. ENGINE
VALVE TIMING DIAGRAM

11. TWO STORKE (PETROL) S.I. ENGINE
PORT TIMING DIAGRAM

12. TWO STORKE (DIESEL) C.I. ENGINE
PORT TIMING DIAGRAM

13. CARBURETTOR
1.0 SIMPLEX CARBURETTOR

14. 2.0 SOLEX CARBURETOR
a. Float circuit b. Starting circuit c. Idling or slow speed circuit
d. Normal running circuit e. Acceleration circuit

15. a. Float circuit b. Starting Circuit

16. c. Idling or slow speed circuit d. Normal running Circuit

17. e. Acceleration circuit

18. DIESEL PUMP (CAV Fuel Injection Pump)

19. FUEL INJECTOR

20. MULTI POINT FUEL INJECTOR (MPFI)

22. BATTERY IGNITION (or) COIL SYSTEM

23. MAGNETO IGNITION SYSTEM

24. COOLING SYSTEM
1.0 Air cooling system

25. a. Thermosyphon b. Pump circulation
2.0 Water cooling system
3.0 THERMOSTAT in cooling system
A thermostat valve is used in the water cooling system to regulate the circulation of water in
system to maintain the normal working temperature of the engine parts during the operating
conditions.

26. LUBRICATION SYSTEM
1.0 Petroil or Mist lubrication system
About 3 to 6% of lubricating oil is mixed with petrol in the fuel tank.
Main disadvantages,
Idle running the oil will get separated and cause clogging of fuel passage in carburetor
.
More oil- will release more carbon deposits in the cylinder
Less oil – insufficient lubrication cause damage to the engine.

27. LUBRICATION SYSTEM
2.0 Wet sump system
Lubrication oil is stored in the oil sump.
a) Gravity system b) Splash system

28. LUBRICATION SYSTEM
2.0 Wet sump system
Lubrication oil is stored in the oil sump.
c) Pressure system

29. LUBRICATION SYSTEM
3.0 Dry sump system
d) Semi pressure system
Lubrication oil is not kept in stored in the oil sump. Oil is carried in a separate tank and fed to
the engine.