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Discussion :: Internal Combustion Engines

  1. In order to eliminate knocking in compression ignition engines, there should be

    2. A.

     Short delay period
    B.

     Late auto-ignition
    C.

     Low compression ratio
    D.

     High self ignition temperature of fuel

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    Answer : Option A

    Explanation :

    In order to eliminate knocking in compression ignition engines, there should be Short delay period -Add 1% of ethyl nitrate or any nitrate to accelerate the combustion of fuel. This process is known as “Doping” and reduce delay period considerably and hence prevent diesel knock. - For spontaneous ignition of the fuel, we require much higher temperature this can be achieved by raising the compression ratio.

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