Classification Of I.C. Engine

Classification Of I.C. Engine

Heat engines are otherwise called Thermal Engines. It is a machine which converts heat energy in to useful mechanical work. Heat engines develop more than 80% the energy generated in the world.

Heat engines can be broadly classified into two categories 

(i) External combustion engine:

An engine in which combustion of fuel takes place outside the engine cylinder is called external combustion engine. These engines are generally called EC engines. 
Ex: Steam engines, steam turbines, closed cycle gas turbine etc. 

(ii) Internal combustion engine:

An engine in which combustion of fuel takes place inside the engine cylinder is called internal combustion engine. These engines are generally called IC engines.
 Ex: Petrol engine, diesel engine, gas engine etc.


The following are the most important ways of classification of I.C. engines:


(i) According to the type of fuel used 

(a) Petrol engines: In this type of engines, the fuel used is petrol. 
(b) Diesel engines: In this type of engines, the fuel used is diesel. 
(c) Gas engines: In this type of engines, the gaseous fuels like natural gas, biogas, are used.
(d) Bi-fuel engines: These engines use a mixture of two fuels.

(ii) According to the number of strokes per cycle 

(a) 4-stroke engine: In this type of engines, the working cycle is completed in four different strokes.

(b) 2-stroke engine: In this type of engines, the working cycle is completed in two different strokes. 

(iii) According to the method of ignition

(a) Spark ignition engine (S.I.Engine):In this type of engines, fuel is ignited by an electric spark generated by a spark plug. 
(b) Compression ignition engine (C.I. Engine): In this type of engines, the fuel gets ignited as it comes in contact with the hot compressed air. 

(iv) According to the cycle of combustion

(a) Otto cycle engine: In this type of engines, combustion of fuel takes place at constant volume 
(b) Diesel cycle engine:In this type of engines, combustion of fuel takes place at constant pressure

(c) Duel combustion engine: In this type of engines, combustion of fuel first takes place at constant volume and then at constant pressure

(v) According to the number of cylinders 

 

(a) Single cylinder engine:This type of engines consists of only one cylinder. 
(b) Multi cylinder engine:This type of engines consists of 2, 3, 4, 6 or 8 cylinders

(vi) According to the arrangement of cylinders 

 

(a) Vertical engine:In this type of engines, the cylinder is arranged in a vertical position 
(b) Horizontal engine:In this type of engines, cylinder is arranged in horizontal position.
(c) Inline engine:In this type of engines, cylinders are arranged in line
 (d) Radial engine:In this type of engines, cylinders are arranged along the circumference of a circle. (e) V-engine: In this type of engines, combination of two inline engines equally set an angle.

(vii) According to the method of cooling

(a) Air cooled engine:In this type of engines, the heated cylinder walls are cooled by continuous flow of air 
(b) Water cooled engine: In this type of engines, water is used for cooling the heated cylinder walls.


More Resources /articles
IC Engine Articles , Notes , Question and Answer
CAD Software | CAD Tutorials
Mechanical Subjectwise Basic Concept Notes ,Articles

 

Sachin Thorat

Sachin is a B-TECH graduate in Mechanical Engineering from a reputed Engineering college. Currently, he is working in the sheet metal industry as a designer. Additionally, he has interested in Product Design, Animation, and Project design. He also likes to write articles related to the mechanical engineering field and tries to motivate other mechanical engineering students by his innovative project ideas, design, models and videos.

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