ICE has many efficencies
1) Indicated thermal effeciency
2) Break thermal Effeciency
3) Volumertic Effciency
4) Relative efficency
With Increasing the Inlet temperature the density of air decrease, so volumetric effeciency, one of the most important parameters in ICE will be affected by the inlet gas temperature.
It will increase to some value then decrease if the inlet air temp. increase to high values as the density of the air decrease.
The modern designs make the Exhaust manifold close to the intake manifold to increase the inlet gas temp., that leads to make the combustion easier only at some designed values . Specially in the SIE the evaporation will faster and more efficient.
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ICE has many efficencies
1) Indicated thermal effeciency
2) Break thermal Effeciency
3) Volumertic Effciency
4) Relative efficency
With Increasing the Inlet temperature the density of air decrease, so volumetric effeciency, one of the most important parameters in ICE will be affected by the inlet gas temperature. It will increase to some value then decrease if the inlet air temp. increase to high values as the density of the air decrease. The modern designs make the Exhaust manifold close to the intake manifold to increase the inlet gas temp., that leads to make the combustion easier only at some designed values. Specially in the SIE the evaporation will faster and more efficient.
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naveen kumar singh
Answered On : Jul 22nd, 2012
With the increase in temperature of intake air specific heat cp and cv increase by equal amount and it will decrease the ratio cp/cv which increase the efficiency...
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It is so easy. As the temperature rises efficiency also rises. Remember the relation effi.=1-(T1-T2)
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Mallayya S M
Answered On : Oct 12th, 2012
As the pressure increases inside the combustion chamber while the fuel enter to the chamber the temperature also increases when the piston moves from bottom dead centre to top dead centre.
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More is the temperature and pressure of the intake air,high is the efficieny but at the same time high intake temperature increases knocking in the SI engines.
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manoj kuamr
Answered On : Dec 12th, 2012
what is meant by knocking
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Awais
Answered On : Jan 11th, 2013
Higher intake temperature of inlet gasses (without effective compression through a turbo charger or supercharger ) will result in decrease in volumetric efficiency of the engine as less air will enter inside the cylinder due to lower density of air fuel mixture.
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vishwa
Answered On : Jan 12th, 2013
The unwanted sound coming from the engine due to the rapid pressure rise is called Knocking
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