### The Compression Ratio Of Ic Engine

In this mechanical applied scientific discipline department today nosotros written report nigh what is the compression ratio of ic engine ? Study of Compression ratio definition, formula, calculation, number of compression ratio etc all theme are written report inward this lecture.

## The Compression ratio of ic engine The Compression ratio of ic engine

In ic engine piston is reciprocating motion in the cylinder. When pistion is deed upwards from bottom that fourth dimension within fuel is compress inward the cylinder.
Compression ratio is pregnant the how much quantity of fuel is compress yesteryear the pistion within the cylinder.

### Compression ratio detects

1) When Compression ratio 1 to 8.6 thus this is depression compression ratio.
2) When compression ratio is 8.6 to 9.6 thus this is medium compression ratio.
3) When compression ratio is greater than 9.6 thus this is high compression ratio.

Compression ratio of si together with ci engine is lower together with higher respectively.

## Compression ratio definition

Compression ratio is defined equally the ratio of book of air inward the cylinder befor compression stroke together with later compression ratio is called equally compression ratio.
Compression ratio is the ratio of  maximum to minimum book inward the cylinder of ic engine.
Compression ratio is likewise defined equally the ratio of book at bottom dead oculus (BDC) to book at transcend dead oculus (TDC).

## Compression ratio formula

C.R = Total book of the cylinder
Clearance volume

C.R = Vs + Vc
Vc Add caption

Vs= swept volume
Vc= clearance volume

## Compression ratio of petrol engine

Petrol engine is required depression compression ratio for skillful burning of petrol.
When compression ratio is real high inward si engine thus Preignition is practise together with that Preignition due to knocking is practise inward petrol engine.
Compression ratio si engine is vi to 12.
Compression ratio inward si engine is kept lower than diesel fuel engine (ci engine).

## Compression  ratio of diesel fuel engine

Diesel engine required high compression ratio for  best burning of diesel.
When compression ratio inward ci engine is depression thus fuel  non burn downwards easily inward starting together with thus conduct chances of creation of knocking.
Compression ratio of ci engine is fifteen to 22.
Compression ratio diesel fuel engine is higher than petrol engine.

## Compression ratio number on engine.

Any engine surgery is depend on the its compression ratio. Compression ratio high thus engine function best,but inward si engine compression ratio is increased than 12 thus knocking is practise thus inward petrol engine compression is lower than 12.l

### Compression ratio number on efficiency

In otto cycle, diesel fuel cycle  together with dual bicycle when compression ratio is increasing thus efficiency of bicycle is increased. So compression ratio is principal parameters for increasing efficiency of ic engine cycles.
Compression ratio is direct proportional thermal efficiency of thermodynamics cycle.

## Compression ratio mcq

Que. compression ratio of si engine is..
A) iii to 5
B) vi to 10
C) 10 to 15
D) fifteen to 20
Ans B

Que.  compression ratio of diesel fuel engine
A) iii to 5
B) vi to 10
C) 10 to 15
D) fifteen to 20
Ans D

Que. Compression ratio of I.c engines is
A) Swept book upon cylinder volume
B) Ratio of book of air inward cylinder earlier compression stroke together with later compression stroke .
C) cylinder book upon swept volume
D) None of these
Ans B

Que .For the same compression ratio the efficiency  of
A) petrol > diesel  > dual combustion engine
B) petrol > dual combustion >diesel engine
C) diesel fuel > petrol > dual combustion engine
D) diesel fuel > dual combustion >petrol engine
Ans A

Que. For the given compression ratio the efficiency  of
A) petrol > diesel  > dual combustion engine
B) petrol > dual combustion >diesel engine
C) diesel fuel > petrol > dual combustion engine
D) diesel fuel > dual combustion >petrol engine
Ans A

In this mechanical applied scientific discipline department today nosotros written report nigh what is the compression ratio of ic engine . if you lot accept whatever questions related that theme thus comment below.

Sumber https://www.mechstudy.com