Comparison between Compression ignition engine and Petrol ignition engine
Comparison between Compression ignition engine and Petrol ignition engine
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Compression ignition engine
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Petrol ignition engine
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It has got fuel injection pump and injector.
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It has got carburetor, ignition coil and spark plug.
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The compression ratio varies from 14:1 to 22:1
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The compression ratio varies from 5:1 to 8:1.
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It uses diesel oil as fuel.
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It uses petrol (gasoline) or power kerosene as fuel.
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Only air is sucked in cylinder in suction stroke.
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Mixture of fuel and air is sucked in the cylinder in suction stroke.
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Fuel is injected in combustion chamber where burning of fuel takes places due to heat of compression.
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Air fuel mixture is compressed in the combustion chamber when it is ignited by an electric spark.
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Thermal efficiency varies from 32 to 38%
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Thermal efficiency varies from 25 to 32%
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Engine weight per horse-power is high.
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Engine weight per horsepower is comparatively low.
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Operating cost is low.
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Operating cost is high.
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Compression pressure inside the cylinder varies from 35 to 45 kg/cm2 and temperature is about 500°C.
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Compression pressure varies from 6 to 10 kg/cm2 and temperature is above 260°C.
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Last modified: Monday, 5 March 2012, 7:45 AM