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Differentiate between Diesel engine & petrol engine?

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Spark ignition engine [S.I. engine]
Petrol engine
Compressor ignition engine. [ C.I. engine]
Diesel engine
1. The mixture of air and petrol is sucked in and compressed in suction stroke Only air is sucked and compressed.
2. The sparking is done at spark plug in air and petrol mixture and explosion is made. The explosion occurs when there is spray on diesel in hot air done by the injection nozzles.
3. Spark plug functions in it. Injection nozzles function here.
4. Light weight engine Heavy engine.
5. Engine works softly so, vibrations are less. It rattles more because of vibrations.
6. Need to maintain engine. Maintenance free engine.
7. When engine works, the carbon less deposits in engine cylinder. The carbon deposits more in cylinder engine.

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