Self-ignition
Encyclopedia
Self-ignition can refer either to
  • Spontaneous combustion
    Spontaneous combustion
    Spontaneous combustion is the self-ignition of a mass, for example, a pile of oily rags. Allegedly, humans can also ignite and burn without an obvious cause; this phenomenon is known as spontaneous human combustion....

     or
  • the ability of Diesel fuel to ignite under high compression and the use of that phenomenon in Diesel engine
    Diesel engine
    A diesel engine is an internal combustion engine that uses the heat of compression to initiate ignition to burn the fuel, which is injected into the combustion chamber...

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