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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INTERNAL COMBUSTION ENGINE PARTS

VIDEO LECTURE ON BASIC COMPONENTS OF IC ENGINE INTERNAL COMBUSTION COMPONENTS An Internal combustion engine has various parts. Some important parts are listed below. Cylinder block Cylinder head Cylinder liner Crankcase Piston Connecting rod Crankshaft Cam shaft Flywheel Valve and valve mechanism Gaskets Lubrication system Cooling system Spark plug and fuel injector Cylinder block It is the main body of the engine. It contains cylinder. It is made by casting method. Cast iron, grey cast iron and its alloys are used. Crank shaft, cam shaft are available inside of the cylinder block Water jackets are provided for water cooled engine blocks. Air cooled cylinder block contains fins to reduce the heat produced inside of the engine. The piston reciprocates inside the cylinder. Cylinder head is placed at the top of cylinder block. The crank case is provided at the bottom of the cylinder block. CYLINDER BLOCK Cylinder head It is made by casting. CI, GCI and its alloys are us

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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Pollution control in thermal powerplant The major devices used to control pollution in thermal power plant are as below Cyclone Seperator Wet Scrubber Electro Static Precipitator Construction and working of these devices are explained in our YouTube video. Here you can download the PDF by clicking the following link. Video link - Click here PDF link - Click here

BASICS OF THERMODYNAMICS

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Does heat transfer takes place in vaccum space?

Of course! How earth receives heat energy from sun? Here is answer for these two questions. Heat can transfer in vacuum space. In this article you may know how heat is transferred in vacuum space. How earth receives heat energy from sun? First we should understand the modes of heat transfer. There are three modes available to transfer heat. They are, Heat conduction, Heat convection and radiation. Let's see one by one. Heat conduction In heat conduction mode of heat transfer heat is transferred by means of molecules present in the object. In this mode, energy will be transferred among the molecules. Example: I am holding a metal bar in my hand. I am going to heat that. What will happen. The bar gets heat from the source. Unfortunately, I can feel heat transfer in another side which is hold by means of hand. There is no objects present in the space. So heat cannot transfer by conduction mode in space. Heat convection In this mode of heat transfer heat is tr

LECTURE NOTES ON THERMODYNAMICS AND AIRCYCLES

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