Effects of Physical and Chemical Properties of Diesel Fuel on NOx Emissions of Heavy-Duty Diesel Engines 972997
In a diesel engine, both physical and chemical properties of the fuel affect exhaust emissions. This study focused on the separation of some physical and chemical effects of the fuel on the NOx emission.
The tests were conducted with a bus engine using four diesel fuels with different density and aromatics levels. The measurements were performed using five injection timing settings to screen the effects of changes in actual injection timing.
When conventional diesel fuel was replaced by reformulated diesel, NOx was reduced 7-13 %. Changes in the injection timing due to differences in the physical properties accounted only for a minor part (10-25 % relative) of the total reduction of NOx, whereas the greater part of the reduction (75-90 % relative) was due to other reasons, mainly fuel chemical properties.
Citation: Nylund, N., Aakko, P., Mikkonen, S., and Niemi, A., "Effects of Physical and Chemical Properties of Diesel Fuel on NOx Emissions of Heavy-Duty Diesel Engines," SAE Technical Paper 972997, 1997, https://doi.org/10.4271/972997. Download Citation
Nils-Olof Nylund, Päivi Aakko, Seppo Mikkonen, Aapo Niemi
Technical Research Centre of Finland, Neste Oy
International Fuels & Lubricants Meeting & Exposition