Modified on
09 Jun 2023 08:37 pm
Skill-Lync
The role of an internal combustion engine is to convert heat energy into mechanical energy. The performance of an IC engine means how it will convert heat energy into mechanical energy. This performance can be measured in terms of certain parameters & these parameters are called performance parameters.
The following are some important parameter which is measured in order to calculate the performance of the engine:
Indicated Power (IP)
I.P=PmALn60000in kW
were,
Brake Power (BP)
B.P=2NT60000in kW
where,
Frictional Power (FP)
F.P=I.P-B.P in kW
Mechanical efficiency(m)
m=B.PI.P
Volumetric efficiency(v)
v=VaVs
were,
Thermal efficiency
i=I.
b=
were,
Indicated means effective pressure
Pm=Area of indicator diagram Spring stiffnessLength of the indicator diagram
Brake mean effective pressure
BMEP=Work done per cycleStroke volume
Air-Fuel ratio
A: F=mamf
were,
Relative Air-Fuel ratio
Relative Air fuel ratio=Actual Air fuel ratioStoichiometric Air fuel ratio
Brake Specific fuel consumption
BSFC=mfB.Pin kg/hour per kW
were,
Specific output
Specific output=B.PAL=PmbN in kW/m3
were,
Author
Navin Baskar
Author
Skill-Lync
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