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Note for IC Engine - ICE by SANTOSH KUMAR NAYAK

  • IC Engine - ICE
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INTERNAL COMBUSTION ENGINE SKNAYAK 1

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WORKING PRINCIPLE • IC engine can work on any one of the following cycles:  Constant volume or Otto cycle  Constant pressure or Diesel cycle  Dual combustion cycle • These may be either four stroke or two stroke cycle engines Indicator Diagram: A graph between pressure and volume; the former being taken on vertical axis and the later on the horizontal axis. This is obtained by an instrument called Indicator. The indicator diagram are of two types: (a) Theoretical or hypothetical and (b) Actual. Theoretical indicator diagram is always longer in size compared to the actual since losses are neglected in the former. 2 SKNAYAK

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WORKING PRINCIPLE A. Otto Engines: (SI Engines) • Used in petrol engines, gas engines, light oil engines in which the mixture of air and fuel are drawn in the engine cylinder. Since ignition in these engines is due to spark, so are called Spark Ignition Engines. The various strokes of a four stroke (Otto) cycle engine are:  Suction Stroke  Compression Stroke  Expansion or power Stroke  Exhaust Stroke 3 SKNAYAK

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WORKING PRINCIPLE 4 SKNAYAK

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