In order to meet future emission targets, heavy-duty (HD) diesel enginemanufacturers are currently focussed primarily on aftertreatment technology.Altering fuel composition is an alternative route towards achieving loweremission levels. The potential of oxygenated fuels to significantly reduceparticulate matter emissions has already been established in the past on olderengine technology. This study will attempt to extrapolate previous results tocurrent and future emission levels. To this end, exhaust gas recirculation(EGR) was applied to a modern EURO-3-type HD diesel engine. Measurements wereperformed in various engine working points, with EGR-levels, and start of fueldelivery timings, set to yield NOx levels between 2.0 and 3.5 g/kWh (typicalfor EURO-4 / EURO-5) running on regular EN590: 2005 diesel fuel. A total of 14blends with oxygenates were tested, containing either a low-sulphur diesel fuel(e.g. Swedish Class I) or a gas-to-liquid synthetic diesel fuel as a base fuel.Results are presented and the impact of fuel composition analysed and comparedwith results from previous research.
|Title of host publication||Proceedings of the international conference on vehicle alternative fuel systems and environmental protection, VAKSEP 2004 : 6-7 July 2004, Dublin, Ireland|
|Place of Publication||Dublin|
|Publisher||Dublin City University|
|Publication status||Published - 2004|