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In this study, regulated, unregulated exhaust emissions and fuel consumption with ultra low sulphur diesel and soy-based biodiesel blends at proportions of 10 and 30% v/v have been investigated. A Euro 4 compliant SUV, equipped with a 2.2 litre common-rail diesel engine and an oxidation catalyst was tested on a chassis dynamometer with constant volume sampling (CVS) technique. Emission and fuel consumption measurements were performed over the New European Driving Cycle (NEDC) and the non-legislated Artemis driving cycles which simulate urban, rural, and highway driving conditions in Europe. The regulated pollutants were characterized by determined NOx, PM, CO, and HC. CO2 was also quantified in the exhaust. Overall, 16 PAHs, 4 nitro-PAHs, 6 oxy-PAHs, 13 carbonyl compounds and particulate alkanes ranged from C13 to C35 were determined in the exhaust.

In the present investigation, tests were carried out to evaluate exhaust emissions of a turbocharged indirect injection diesel engine fuelled with diesel - biodiesel blends. The vehicle was Euro III compliant, fuelled with a typical diesel fuel and used frying oil methyl ester blends at proportions of 2, 5, 10, and 20% respectively. Based on the New European Driving Cycle (NEDC), regulatred and unregulated exhaust emissions were determined over a chassis dynamometer. The use of biodiesel resulted into a significant decrease of HC emissions. NOx and CO emissions exhibited a decreasing trend with the addition of the biodiesel. On the contrary, higher levels of PM emissions were observed. For carbonyl compounds, emissions of acetaldehyde were significantly increased with formaldehyde showing a slight increasing trend.

This study investigates the impact of low concentration biodiesel blends on the regulated and polycyclic aromatic hydrocarbon (PAH) emissions from a modern passenger vehicle. The vehicle was Euro 4 compliant fitted with a direct injection common-rail diesel engine and a diesel oxidation catalyst. Emission and fuel consumption measurements were performed on a chassis dynamometer using constant volume sampling (CVS) technique, following the European regulations. All measurements were conducted over the type approval New European Driving Cycle (NEDC) and the real-traffic-based Artemis driving cycles. Aiming to evaluate the fuel impact on emissions, a soy-based, a palm-based, and a rapeseed oil-based biodiesel were blended with an ultra-low sulfur diesel at proportions of 10, 20, and 30% by volume. The experimental results revealed that emissions of PM, HC and CO decreased with biodiesel over most driving conditions.