ENGINE AND ITS CLASSIFICATIONS

VIDEO LECTURE ON ENGINE AND ITS CLASSIFICATIONS

ENGINE

What is engine ?

It is a power generating machine which converts power into motion.
Otherwise we can define as, engine is a device which converts heat energy of the fuel into mechanical energy.

Example : Petrol engine, Diesel engine

INTERNAL COMBUSTION ENGINE

What is heat engine?

Heat engine is a device which converts heat energy into work.

Example: IC engine, EC engine

EXTERNAL COMBUSTION ENGINE

What is IC engine ?

IC engine also called as internal combustion engine.
The combustion of fuel takes place inside of the cylinder.
During combustion process, chemical energy of the fuel is converted into heat energy. Further it is converted into useful work.

Example : Petrol engine, Diesel engine, Gas turbine.

TURBINE

What is EC engine ?

EC engine also called as external combustion engine.
The combustion of fuel takes place externally.
In external combustion engine heat energy is converted into mechanical work.

Example : Steam turbines used in thermal power plant. Gas turbine power plant.

CLASSIFICATIONS OF ENGINE

Based on construction

Rotary engine Ex: Wankel engine
Reciprocating engine Ex: Petrol engine

ROTARY ENGINE

RECIPROCATING ENGINE

Based on thermodynamic cycle

Otto cycle Ex: Petrol engine
Diesel cycle Ex: Diesel engine

Based on fuel

Petrol Ex: Petrol engine
Diesel Ex: Diesel engine

Based on cooling system

Air cooled engine Ex: Two wheeler
Water cooled engine Ex: Four Wheeler

Based on strokes

Two stroke engine Ex: RX 100 bike
Four stroke engine Ex: Hero passion

TWO STROKE ENGINE

FOUR STROKE ENGINE

Based on ignition system

Spark ignition system Ex: Petrol engine
Compression ignition system Ex: Diesel engine

Based on arrangement of cylinder

Horizontal engine
Vertical engine
V type engine
In line engine
Radial engine

HORIZONTAL ENGINE

VERTICAL ENGINE

V TYPE ENGINE

INLINE ENGINE

RADIAL ENGINE

Based on speed

Low speed engine
Medium speed engine
High speed engine

Based on Number of cylinder

Single cylinder engine
Multi cylinder engine

SINGLE CYLINDER ENGINE

MULTI CYLINDER ENGINE

Based on Lubrication system

Petrol or mist lubrication system
Wet sump lubrication system
Dry sump lubrication system

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Working of four stroke petrol engine

• A four stroke engine is an internal combustion engine in which the piston completes four separate strokes while turning the crank shaft. • A four stroke engine delivers one power stroke for every two cycles of the piston. • Following strokes are continuously taking place. ü Suction stroke – Suction of air fuel mixture takes place. ü Compression stroke – Adiabatic compression of air fuel mixture. ü Power stroke – Combustion and adiabatic expansion taking place. ü Exhaust stroke – Burnt gases are exhausted from the cylinder. SUCTION STROKE :- • During suction stroke, inlet valve is opened and exhaust valve is closed. • Piston moves TDC to BDC • When the piston moved TDC to BDC vacuum is created inside the cylinder. • Due to the vacuum air fuel mixtures is drawn into the cylinder. • Inlet valve is closed at the end of suction stroke. COMPRESSION STROKE :- • In compression stroke

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CONCEPT PEN

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