RTD Biodiesel (B20) Transit Bus Evaluation: Interim Review Summary

Abstract

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Soy-Biodiesel Impact on NOxEmissions and Fuel Economy for Diffusion-Dominated Combustion in a Turbo−Diesel Engine Incorporating Exhaust Gas Recirculation and Common Rail Fuel Injection

“…NO x emissions on the other hand generally show an increase of approximately 10% from diesel to biodiesel, though the biodiesel NO x observations reported in the literature show some variation. Some studies have reported no change or even reductions in NO x emissions, while most studies have reported increases in NO x emissions. ,,, According to studies by McCormick et al and Eckerle et al, the NO x increase as a result of biodiesel combustion may be more significant in modern engines. In agreement with those studies, the Purdue experimental results show significant increases in NO x of 18.9%, 16.7%, and 37.9%, respectively, at the three points considered, as seen in Figure .…”

Impact of biofuel blends on the emissions of modern vehicles

“…Various literature resources exist regarding the effect of biodiesel blending on emissions and fuel consumption. A lot of tests have been performed in the USA, and specifically in heavy-duty examples (mostly on engines) [10][11][12][13][14][15][16][17][18]. Test results on European or light-duty vehicles are far more difficult to find, especially for newer types of technology.…”