BS EN 15195:2007 Liquid petroleum products - Determination of ignition delay and derived cetane number (DCN) of middle distillate fuels by combustion in a constant volume chamber
This document specifies a test method for the quantitative determination of ignition delay of middle distillate
fuels intended for use in compression ignition engines. The method utilizes a constant volume combustion
chamber designed for operation by compression ignition, and employing direct injection of fuel into
compressed air that is controlled to a specified pressure and temperature. An equation is given to calculate
the derived cetane number (DCN) from the ignition delay measurement.
This standard is applicable to diesel fuels, including those containing FAME. The method is also applicable to
middle distillate fuels of non-petroleum origin. However, users applying this standard especially to
unconventional diesel fuels are warned that the relationship between derived cetane number and combustion
behaviour in real engines is not yet fully understood. The standard covers the ignition delay range from 3,3 ms
to 6,4 ms (61 DCN to 34 DCN). The combustion analyser can measure shorter or longer ignition delays, but
precision can be affected.
NOTE For the purpose of this European Standard, the expression “% (V/V)” is used to represent the volume fraction
and “% (m/m)” the mass fraction.
WARNING — The use of this standard may involve hazardous materials, operations and equipment.
This standard does not purport to address all of the safety problems associated with its use. It is the
responsibility of the user of this standard to establish appropriate safety and health practices and
determine the applicability of regulatory limitations prior to use.
BS EN 15195:2007 history
2023BS EN 15195:2023 Liquid petroleum products. Determination of ignition delay and derived cetane number (DCN) of middle distillate fuels by combustion in a constant volume chamber
2014BS EN 15195:2014 Liquid petroleum products. Determination of ignition delay and derived cetane number (DCN) of middle distillate fuels by combustion in a constant volume chamber
2007BS EN 15195:2007 Liquid petroleum products - Determination of ignition delay and derived cetane number (DCN) of middle distillate fuels by combustion in a constant volume chamber