A recently approved method for cetane determination using the Ignition -Quality Tester (IQT™) is based on an ignition delay measurement in a combustion bomb apparatus, which is empirically correlated to cetane number. The correlation assumes that all fuels will respond to the different pressure and temperature domains of the IQT™ and the cetane test engine in the same way. This assumption was investigated at a more fundamental level by conducting IQT™ measurements at different pressure and temperature points and characterising the ignition delay of the fuel in terms of an Arrhenius autoignition model. The fuel model was combined with a mathematical model of the cetane engine and the concept was evaluated using a variety of test fuels, including the diesel cetane rating reference fuels. The analysis technique was able to accurately predict the cetane number in all cases.
Understanding the Relation Between Cetane Number and Combustion Bomb Ignition Delay Measurements
Sae Technical Papers
2004 SAE Fuels & Lubricants Meeting & Exhibition ; 2004
2004-06-08
Conference paper
English
Understanding the relation between cetane number and combustion bomb ignition delay measurements
Automotive engineering | 2004
|British Library Conference Proceedings | 2004
|Ignition delay and cetane number
Automotive engineering | 1986
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