Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Impact of Engine Lubricant Properties on Regulated Gaseous Emissions of 2000-2001 Model-Year Gasoline Vehicles
The impact of the sulfur (S) content in lubricating oil was evaluated for four ultra-low-emission vehicles and two super-ultra-low-emission vehicles, all with low mileage. The S content in the lube oils ranged from 0.01 to 0.76%, while the S content of the gasoline was fixed at 0.2 ppmw. Vehicles were configured with aged catalysts and tested over the Federal Test Procedure, at idle and at 50-mph cruise conditions. In all testing modes, variations in the S level of the lubricant did not significantly affect the regulated gas-phase tailpipe emissions. In addition to the regulated gas-phase emissions, a key element of the research was measuring the engine-out sulfur dioxide (SO2) in near-real-time. This research used a new methodology based on a differential optical absorption spectrometer (DOAS) to measure SO2 from the lubricants used in this study. With the DOAS, the contribution of SO2 emissions for the highest-S lubricant was found to range from less than 1 to 6 ppm on a gasoline S equivalent basis over the range of vehicles and test cycles used. The development and operation of the DOAS is discussed in this paper.
Impact of Engine Lubricant Properties on Regulated Gaseous Emissions of 2000-2001 Model-Year Gasoline Vehicles
The impact of the sulfur (S) content in lubricating oil was evaluated for four ultra-low-emission vehicles and two super-ultra-low-emission vehicles, all with low mileage. The S content in the lube oils ranged from 0.01 to 0.76%, while the S content of the gasoline was fixed at 0.2 ppmw. Vehicles were configured with aged catalysts and tested over the Federal Test Procedure, at idle and at 50-mph cruise conditions. In all testing modes, variations in the S level of the lubricant did not significantly affect the regulated gas-phase tailpipe emissions. In addition to the regulated gas-phase emissions, a key element of the research was measuring the engine-out sulfur dioxide (SO2) in near-real-time. This research used a new methodology based on a differential optical absorption spectrometer (DOAS) to measure SO2 from the lubricants used in this study. With the DOAS, the contribution of SO2 emissions for the highest-S lubricant was found to range from less than 1 to 6 ppm on a gasoline S equivalent basis over the range of vehicles and test cycles used. The development and operation of the DOAS is discussed in this paper.
Impact of Engine Lubricant Properties on Regulated Gaseous Emissions of 2000-2001 Model-Year Gasoline Vehicles
Durbin, Thomas D. (Autor:in) / Sauer, Claudia G. (Autor:in) / Pisano, John T. (Autor:in) / Rhee, Sam H. (Autor:in) / Huai, Tao (Autor:in) / Miller, J. Wayne (Autor:in) / MacKay, Gervase I. (Autor:in) / Robbins, John (Autor:in) / Gamble, Heather (Autor:in) / Hochhauser, Albert M. (Autor:in)
Journal of the Air & Waste Management Association ; 54 ; 258-268
01.03.2004
11 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
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