Browse Publications Technical Papers 2003-01-1865

Effect of Sulfur-free and Aromatics-free Diesel Fuel on Vehicle Exhaust Emissions using Simultaneous PM and NOx Reduction System 2003-01-1865

A new diesel after-treatment system, Diesel Particulate and NOx Reduction System (DPNR), is being developed for reducing PM and NOx emissions. We examined the effects of sulfur content in lubricants on exhaust NOx emission from DPNR catalyst, and examined the PM reduction ability using sulfur-free and aromatics-free fuel. After vehicle durability testing of 40,000 km without forced regeneration of PM and sulfur poisoning on DPNR catalyst, deterioration of DPNR was lower than using higher sulfur contents in fuel and oil. In addition to decreasing fuel sulfur, decreasing oil sulfur was also effective to maintain high NOx conversion efficiency. Although the catalyst was poisoned by sulfur in the lubricants, the influence of oil sulfur poisoning on the catalyst was lower than fuel sulfur poisoning. On the other hand, engine out PM emissions decreased by 70 % because of aromatics-free fuel. The pressure drop of DPNR did not increase during the 40,000 km vehicle durability test. Engine-out PM emissions are much lower than the PM oxidation capability of the catalyst. Thus, the combination of sulfur-free and aromatics-free fuel with the DPNR system effectively maintains low PM and NOx emissions, and reduces the frequency of regeneration due to PM accumulation and sulfur poisoning.


Subscribers can view annotate, and download all of SAE's content. Learn More »


Members save up to 17% off list price.
Login to see discount.
Special Offer: Download multiple Technical Papers each year? TechSelect is a cost-effective subscription option to select and download 12-100 full-text Technical Papers per year. Find more information here.
We also recommend:

Fuel and Lubricant Effects on Nucleation Mode Particle Emissions From a Euro III Light Duty Diesel Vehicle


View Details


Ultrafine Particles from a Heavy Duty Diesel Engine Running on Rapeseed Oil Methyl Ester


View Details


The Effect of Fuel Processes on Heavy Duty Automotive Diesel Engine Emissions


View Details