Engine- An engine is a machine designed to convert energy into useful work

Image of Mercedes engine with 6 cylinder

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

Internal combustion engine- Combustion takes place inside engine called I.C.Engine.

Examples. Jet engine, Automobile Engine etc.

Image of S.I. combustion Engine

Showing Internal combustion petrol four stroke engine

1.Suction stroke

2. Expansion stroke

3. Power stroke

4.Exhaust stroke

Exhaust Inlet

Internal combustion 2 stroke engine

Ports are used in 2 stroke engine in

the place of valve.

360’ revolution of crankshaft

Exhaust

Inlet

External combustion Engine- Combustion takes place outside engine

Examples. Turbines, steam locomotive etc.

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.

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

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

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

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

Four cylinder engine- Consist of four cylinder

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