BS EN 16906:2017 specifies a test method for the determination of cetane numbers ("CN") in diesel fuel in the range from CN 45 to CN 63, using a standard single cylinder, four-stroke cycle, indirect injection engine. The cetane number provides a measure of the ignition characteristics of diesel fuels in compression ignition engines. The cetane number is determined at constant speed in a compression ignition test engine equipped with a swirl chamber.

This European Standard is applicable to distillate as well as paraffinic diesel fuels intended for use in diesel engines, including those containing fatty-acid methyl esters (FAME), ignition-improvers or other additives. The cetane number scale comprises a range from zero to 100, but typical testing is currently performed in the range from about 40 CN to about 75 CN.

This engine test procedure may be used for other fuels such as synthetics and vegetable oils. However, samples with fuel properties that interfere with the gravity-based pre-supply pressure to the fuel pump e.g. due to high viscosity can only be used to a limited extent. Precision data for such fuels are not available at this stage. Precision data for paraffinic diesel fuels are currently under development.


Cross References:
EN ISO 3170 (ISO 3170:2004) AS
ISO 3171:1988
ISO 3170:2004 Ed 3
EN ISO 3171 (ISO 3171:1988 Adopted)
DIN 51422-2:2004-09
DIN 51773:2010-04
EN ISO 5165:1998
CEN/TC 19 2014-480
ISO 5165:1998
ISO 4259:2006 Ed 3
EN ISO 4259 (ISO 4259:2006) AS


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