The document discusses different types of engines, primarily focusing on internal and external combustion engines. Internal combustion engines operate by burning fuel inside the engine, with examples including jet and automobile engines, while external combustion engines burn fuel outside, such as in turbines and steam locomotives. It also classifies engines based on cylinders, describing single-cylinder and multi-cylinder engines, including various configurations like two-cylinder and four-cylinder engines.

2. Engine- An engine is a machine designed to convert energy into
useful work
Image of Mercedes engine with 6 cylinder

3. Heat engine- Devices converting heat energy into motion are commonly
referred to simply as engines.
Types-
There are two type of engines
1. Internal Combustion Engine
2. External Combustion Engine

4. Internal combustion engine- Combustion takes place inside engine called
I.C.Engine.
Examples. Jet engine, Automobile Engine etc.
Image of S.I. combustion Engine

5. Showing Internal combustion petrol four stroke engine
1.Suction stroke
2. Expansion stroke
3. Power stroke
4.Exhaust stroke
Exhaust Inlet

6. Internal combustion 2 stroke engine
Ports are used in
2 stroke engine in
the place of
valve.
360’ revolution of
crankshaft
Exhaust
Inlet

7. External combustion Engine- Combustion takes place outside
engine
Examples. Turbines, steam locomotive etc.

8. Classification on the basis of cylinder
1. Single cylinder engine
2. Multi cylinder engine
1. Single cylinder engine- A single cylinder engine is a basic piston engine configured
of an internal combustion engine.
Example. Motorcycles, auto rickshaw, scooter, moped etc.

9. 2. Multi cylinder engine- It consist multiple cylinder and balancing of all
piston is very complicated as compare to single cylinder engine

10. These multi cylinder engine may be of different types
Some of them are
1. Two cylinder engine
2. Three cylinder engine
3. Four cylinder engine
4. Five cylinder engine
And many more.
Arrangement of cylinder can be
Straight twin engine
V- twin engine
Flat twin engine
U-engine

11. Two cylinder engine- It consist two cylinder configured to rotate crankshaft. Each
piston revolve crankshaft at 360’

12. Three cylinder engine- These type of engine consist of three cylinder and crank
throws at 120’.

13. Four cylinder engine- Consist of four cylinder

14. Five cylinder engine- Five piston works at same time these types of engine is
called five cylinder engine.