This European Standard 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 with direct fuel injection into heated, compressed synthetic air. A dynamic pressure wave is produced from the combustion of the product under test. An equation converts the ignition delay and combustion delay determined from the dynamic pressure curve to the derived cetane number (DCN). This method is applicable to diesel fuels, FAME and blends of diesel fuels and FAME.
The method is also applicable to middle distillate fuels of nonpetroleum origin, although users applying this standard are warned that the relationship between ignition characteristics and engine performance in unconventional fuels is not yet fully understood. The standard covers the ignition delay range from 1,9 ms to 25 ms and combustion delay from 2,5 ms to 160 ms (70 DCN to 30 DCN). However the precision stated only covers the range of 67 to 39 DCN.
NOTE For the purpose of this European Standard, the expression “% (V/V)” is used to represent the volume fraction (φ), and “% (m/m)” the mass fraction (ω).
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.
Registration number (WIID)
40422
Scope
This European Standard 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 with direct fuel injection into heated, compressed synthetic air. A dynamic pressure wave is produced from the combustion of the product under test. An equation converts the ignition delay and combustion delay determined from the dynamic pressure curve to the derived cetane number (DCN). This method is applicable to diesel fuels, FAME and blends of diesel fuels and FAME.
The method is also applicable to middle distillate fuels of nonpetroleum origin, although users applying this standard are warned that the relationship between ignition characteristics and engine performance in unconventional fuels is not yet fully understood. The standard covers the ignition delay range from 1,9 ms to 25 ms and combustion delay from 2,5 ms to 160 ms (70 DCN to 30 DCN). However the precision stated only covers the range of 67 to 39 DCN.
NOTE For the purpose of this European Standard, the expression “% (V/V)” is used to represent the volume fraction (φ), and “% (m/m)” the mass fraction (ω).
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.
