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Effects of Physical and Chemical Properties of Diesel Fuel on NOx Emissions of Heavy-Duty Diesel Engines
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Abstract
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.
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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.Also In
References
- Signer, M. et al. European Programme on Emissions, Fuels and Engine Technologies (EPEFE) - Heavy Duty Diesel Study SAE Technical Paper 961974 1996 16
- Mikkonen, S. et al. Reformulated Diesel Fuel - Four Years Experience in Finland SAE Technical Paper 971634 1997 15
- Willmann, M. et al. 56 1995 722 727
- Boehner, W. Hummel, K. Common Rail Injection System for Commercial Diesel Vehicles SAE Techical Paper 970345 1997 9
- Regulation No. 49, Revision 2 Geneva United Nations, ECE 1993 61