Development of the Utep E85-fueled Vehicle

UTEP has developed a dedicated E85 vehicle with superior emissions and cold starting characteristics when compared to the original gasoline vehicle, and with no apparent differences in performance and driveability. All fuel system components that were not E85 compatible have been replaced or modified. Cold start characteristics are improved by incorporating a high frequency multiple spark ignition system and a high-pressure fuel delivery circuit, successfully extending the lean flammability limit of E85. The stock ECM is utilized for engine control and provides sufficient control during all normal driving conditions. To account for differences in fuel characteristics, increased mass flow rate injectors are used. An ethanolspecific light-off and main catalyst are being utilized for emissions reductions. To further reduce required warm up time, the exhaust manifold is coated with a ceramic material up to the exhaust catalyst. There have been no internal engine modifications to maintain fuel flexibility. However, the intake manifold has been honed, which provides an approximate 15 horsepower increase.