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IC Engine Efficiency

With increasing temperature of intake air IC engine efficiency will increase or decrease? Explain
Asked by: anurag_mechanical | Member Since Apr-2010 | Asked on: Apr 2nd, 2010

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Showing Answers 1 - 9 of 9 Answers
hosam_ozo

Answered On : Apr 8th, 2010

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ICE has many efficencies 1) Indicated thermal effeciency2) Break thermal Effeciency3) Volumertic Effciency4) Relative efficencyWith 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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aakashpanchal

Answered On : May 7th, 2010

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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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bhanu tomar

Answered On : Oct 8th, 2012

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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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