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In this paper, a dynamic oxygen fraction model for a biodiesel-compatible engine with a dual-loop exhaust gas recirculation (EGR) system is developed. When oxygenated fuel is applied in an engine, the intake manifold oxygen fraction, which is an important factor for both combustion and emissions, can be chosen as a new reference for evaluating the equivalent EGR level instead of EGR ratio. Based on...
Biodiesel is an alternative fuel derived from vegetable oils, animal fats, or other sources, and it can be made into biodiesel blends by mixing with conventional diesel. To achieve optimal engine combustion as well as minimal emissions with biodiesel blends, on-board blend level estimation system is one of the prerequisites. The paper explores two possible approaches of estimation: 1) oxygen-based...
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