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Due to various concerns involving conventional gasoline, there has been a growing interest in the study of alternative fuels and their use in the automotive industry. There has been particular interest in the fuel effects of varying levels of ethanol blends and other alternative fuels on vehicle emissions and fuel economy. This paper will examine and compare both exhaust emissions and fuel economy for various ethanol blended fuels, and a 16 % butanol blended fuel. The results were generated using the U.S. Federal Test Procedure. Vehicles that are certified to U.S., European, and Brazilian government standards were tested. These vehicles include a flex fuel capable (FFV) 2007 Chevrolet Zafira (E100-FFV), 2007 Chevrolet Suburban (E85-FFV), 2007 Saab 9-5 BioPower (E85-FFV), 2007 Chevrolet Suburban, 2007 Pontiac G5, and a 2006 Pontiac G6. The fuels examined were E10, E20, E85, and Bu16. Each fuel was splash blended to make up the proper finished fuel blend. Fuel economy and emissions results from these fuels were compared with those from Tier 2 Emissions Certification fuel.
vehicle fuel economy, emissions, ethanol, butanol
Senior Biofuel Implementation Engineer, General Motors Powertrain, Pontiac, MI
Biofuels Project Engineer, General Motors Powertrain, Milford, MI