Answer / naga koteswararao

actually the fuel air mixture is ignited by the aid of spark
plug, but because of high temperature areas around the
cylinder the fuel air mixture is ignited before spark gets .
this phenomenon is called auto ignition

Answer / pramod

fule get ignited due to some high temperature areas in the
combustion chamber and not because of spark generated by
spark plug.

Answer / suchita

auto ignition temperature is that at which it catches fire
without external aid.

Answer / shah abdul haseeb

As we know in combustion chamber fuel and air mixture is present and it is ignited with the help of spark plug . But sometimes due to high temperature and pressure in combustion chamber fuel itself burned before the spark plug fires this phenomena is known as self ignition in petrol engine.

Answer / arslantiger439

spontaneous ignition of some or all of the fuel-air mixyure
in the combustion chamber of internal combustion
engine.also known as spontaneous combustion.

Answer / rakesh panchal

simply spark plug........because in petrol
engines.combenation of air and fuel in the form of fine
vapous easily ignite with the help of
spark ...............this is the simple phenomena of
autoignition in petrol engine

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