1990-10-01

Emission Comparison of DDC 6V-92TA on Alcohol Fuels 902234

The Detroit Diesel 6V-92TA engine has been redesigned to run on alcohol fuels to meet 1991 urban bus emission standards. A prototype engine was tested over the EPA transient procedure, using mixtures of methanol, ethanol (with and without water), gasoline, and ignition enhancer. Regulated and selected unregulated emissions were measured. Organic material hydrocarbon equivalent (OMHCE) emissions were significantly above the hydrocarbon emission standard; however, emissions of CO and NO, were below the 1991 emission standards for the fuel combinations used. Particulate emissions were close to the 1991 urban bus emission standard for some configurations. The method used for calculating OMHCE emissions when ethanol was used is also given.

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