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Article | REF: B2700 V1

Combustion in diesel engines

Author: Alain HAUPAIS

Publication date: February 10, 1992

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3. Self-inflammation

Note :

the reader is referred to the article Fuels and combustion [B 2 520] in this treatise.

3.1 Self-ignition mechanism

If the mixture of fuel and air is exposed to a gradually increasing temperature, it ignites spontaneously when a threshold temperature is exceeded. This is the self-ignition mechanism. This threshold temperature is called the auto-ignition temperature, often referred to as TAI.

Without going into the intricate details of this complex chemical mechanism, it can be described qualitatively as follows:

  • at temperatures even lower than TAI, fuel mixed...

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