Concept Of Terms Connected With Internal Combustion Engine.

Many different terms are used in Internal Combustion Engines,the important terms which are connected with Internal Combustion Engines are covered in this post.These are follows.

01)Bore:-
The inside Diameter of the Cylinder is known as the Bore and it is measured in millimeter (mm).

02)Stroke:-
It is the distance travelled by the Piston from one of its dead centre position to the other dead centre position.

03)Dead Centre:-
They corresponds to the positions occupied by the piston at the end of its Stroke,where the centre line of the Connecting Rod and Crank are in the same straight line.For Vertical Engines these are known as Top Dead Centre (T.D.C) and Bottom Dead Centre (B.D.C) position.In Horizontal Engines,these are known as Inner Dead Centre (I.D.C) and Outer Dead Centre (O.D.C) position.

04)Top Dead Centre:-
In Vertical Engines,the top most position of the Piston towards the cover end side of the cylinder is known as Top Dead Centre.

05)Bottom Dead Centre:-
In Vertical Engines,the lower position of the Piston towards the Crank end side of the cylinder is known as Bottom Dead Centre.

06)Piston Displacement:-
It is also known as "Swept Volume".It is the volume through which the Piston sweeps for its one Stroke.It is equal to the Area of cross section of the Piston multiplied by its Stroke Length.

07)Clearance Volume:-
It is the Volume included between the Piston and the Cylinder Head when the Piston is at its Top Dead Centre in Vertical Engines and inner Dead Centre in Horizontal Engines.The Clearance Volume is generally expressed as percentages of Swept Volume.

08)Compression Ratio:-
It is the ratio of the total Cylinder Volume to the Clearance Volume.For Petrol Engines the value of Compression Ratio is varies from 5:1 To 9:1 and for Diesel Engines varies from 14:1 To 22:1

09)Piston Speed:-
It is the distance travelled by the Piston in one minute.The piston Speed=2LN meter/min.If the R.P.M. of Engine Shaft=N and length of Stroke=L meter.

10)Crank Throw:-
This is the distance between the Centre of Crankshaft and Centre of Crank Pin.The distance will be equal to half the Stroke Length