1. BASIC MECHANICAL ENGINEERING

2. INTERNAL COMBUSTION ENGINES

3. Four Stroke Cycle – Otto Cycle

7. Starting position, intake stroke, and compression stroke.

8. Ignition of fuel, power stroke, and exhaust stroke.

9. Four Stroke Cycle – Diesel Cycle

11. Two Stroke Cycle – Otto Cycle

12. Comparison of 4 - stroke & 2 - stroke Engines To produce same power 2 stroke cycle engine will be of less weight and space To produce same power 2 stroke cycle engine will be of less weight and space More uniform turning moment in 2 stroke cycle engine More uniform turning moment in 2 stroke cycle engine Since no valve in 2 stroke cycle engine more mechanical efficiency, simple construction, low initial cost, power saving… Since no valve in 2 stroke cycle engine more mechanical efficiency, simple construction, low initial cost, power saving… Fuel consumption is increased in 2 stroke cycle engine Fuel consumption is increased in 2 stroke cycle engine

13. Comparison of 4 - stroke & 2 - stroke Engines Two-stroke engines don't last nearly as long as four-stroke engines due to the lack of a dedicated lubrication system. Two-stroke engines don't last nearly as long as four-stroke engines due to the lack of a dedicated lubrication system. Two-stroke engines produce a lot of pollution due to the combustion of the oil and due to the fact that each time a new charge of air/fuel is loaded into the combustion chamber, part of it leaks out through the exhaust port. Two-stroke engines produce a lot of pollution due to the combustion of the oil and due to the fact that each time a new charge of air/fuel is loaded into the combustion chamber, part of it leaks out through the exhaust port.

14. Fuel Supply Fuel Supply – Fuel injection in Diesel Engines Fuel Supply

15. Fuel Supply Fuel Supply - Carburetion in Petrol Engines Fuel Supply

16. Different Systems in IC Engines Ignition System in Petrol Engines Ignition System in Petrol Engines Ignition System in Petrol Engines Ignition System in Petrol Engines Cooling System in IC Engines Cooling System in IC Engines Cooling System in IC Engines Cooling System in IC Engines Lubrication System in IC Engines Lubrication System in IC Engines –Splash Method –Pressure feed Method –Properties of Lubricants: Viscosity, Not vaporizing at operating temperature range, High specific heat, Good cohesive and adhesive qualities

17. MPFI Engine