article thumbnail

Birmingham study finds butanol-gasoline blend reduces GDI engine-out carbonaceous emissions; similar NOx

Green Car Congress

The engine was operated at stoichiometric conditions where the oxygen concentration was controlled by a Heated Exhaust Gas Oxygen (HEGO) sensor. The researchers also equipped the engine with a high-pressure external EGR system (designed and implemented by the University of Birmingham). For the study, the team used a fou-cylinder, 2.0-liter

Gasoline 170
article thumbnail

Massachusetts to Accept Only Waste-Derived Biofuels to Qualify for Mandate for Diesel and Home Heating Oil

Green Car Congress

For consideration as a qualifying fuel, the waste-derived biofuel must yield a 50% greenhouse gas reduction threshold required in the Massachusetts law as determined by a preliminary analysis based on both CARB and EPA methodologies. Massachusetts Biofuels Mandate Program Design Decisions and Implementation Plan. The Mandate.

article thumbnail

Optimizing Turbo Diesels for Emissions and Performance with 5% and 20% Biodiesel Blends

Green Car Congress

Stock engine design and controls target delivering optimal performance with conventional diesel fuel; this leads, however, to suboptimal results for biodiesel in terms of the BSFC and NO x increases. However, with an energy density 13% lower than diesel (37.5

Diesel 186