| Engine technology, fuel technology and exhaust after treatment are the emission control methods for internal combustion engines. This experimental study investigates low sulfur/aromatic diesel fuel as one possible fuel technology for particulate matter (PM) reduction and the effect of an exhaust after treatment method, diesel oxidizing catalyst (DOC), on nitrogen oxides (NOx). Each major chapter of this thesis has been written as a stand-alone paper. The first chapter is an introduction to air pollution from mobile sources. The next study investigates the effect of fuel properties on PM emission from diesel engines, as a fuel technology approach for PM reduction. The last study investigates the effect of DOC on NOx emission from diesel engines, as an exhaust after treatment approach that may affect NOx control. The conclusions are low sulfur/aromatic diesel fuel significantly reduces PM, while DOC slightly increases NOx emission from the tested diesel engines. |
