A new study shows that biodiesel used in buses cuts down on the amount of air pollution compared to buses using more conventional diesel. This news release from the Mineta National Transit Research Consortium (MNTRC), a coalition of nine university transportation centers led by the Mineta Transportation Institute at San Jose State University, showed that using biodiesel could effectively reduce the mass of particulate matter released in both hot and cold idle modes.
[Principal co-investigators were Dr. Ashok Kumar] said, “Physical properties of biodiesel blends are very important during engine combustion. Higher viscosity causes reduced fuel leakage during injection, which drives an advance in injection timing and an increase of mass injection rate. Density of the fuels affects the start of injection, injection pressure, fuel spray characteristics, etc. When the fuel temperature changes and enters an engine with different temperatures (hot or cold), fuel acts differently and the emissions are different.”
In sum, it is recommended that governments consider using blends of biodiesel in urban and commercial vehicles to enhance the quality of air and to promote healthy living.Read More











