Effect of alternative fuels on aftertreatment device.

摘要

There is no doubt that globally, alternative fuels have attained the center of attention in order to reduce the dependency on fossil fuels. A lot of research has been conducted on the alternative fuels in the automotive industry pertaining to the sustainability, engine performance and the emission characteristics.;The focus of this study is to investigate the effect of alternative fuels (JP8, Soy-based B20, and S8) on the aftertreatment device. Different fuel properties (both physical and chemical properties) affect the in cylinder combustion and engine out emissions. The research is conducted on a multi-cylinder commercial diesel engine (MBE 926) and the aftertreatment device is comprised of a Diesel Oxidizing Catalyst (D.O.C.) followed by a Diesel Particulate Filter (D.P.F.). The engine has a stock Electronic Control Unit (E.C.U.) and is calibrated to run on Ultra Low Sulfur Diesel (U.L.S.D.).;The testing at 5 bar IMEP was done in order to compare the data with a high speed single cylinder diesel engine in one of the test cells (lab 1356) at center of automotive research. On the other hand, at 7.5 bar IMEP, the investigation pertains to the effect of speed on in-cylinder combustion and the emissions. The emissions were recorded both before and after the aftertreatment device.;The study involves the effect of engine speed, engine load, fuel type, EGR concentration on the in-cylinder combustion and the emissions. Also, the study involves the effect of the aftertreatment device on the engine out emissions.