Abstract

Biodiesel is a diesel fuel alternative which is produced from renewable and domestically available sources. The use of biodiesel generally lowers carbon dioxide, carbon monoxide and particulate matter emissions. However, there are certain challenges associated with the use of biodiesel, mainly (1) lower fuel energy density, (2) increased nitrogen oxide (NOx) emissions and (3) fuel variability due to feedstock and processing differences. In prior efforts, the authors have demonstrated that the first two of these challenges can be overcome for different blend fractions of soy-based biodiesel by using a control algorithm incorporating energy-based fueling for torque control and combustible oxygen mass fraction control for NOx regulation. However, in addition to overcoming these combustion-related challenges, in this work, the authors consider the extension of these techniques to biodiesel generated from oils/fats of varying composition. The type of oil/fat from which the biodiesel is derived will impact the ...

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