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Transit Bus Operation with a DDC 6V-92TAC Engine Operating on Ignition-Improved Methanol
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Abstract
The use of methanol as a fuel in transit buses is being demonstrated through the use of diesel engine retrofits and an ignition improver to methanol. This project is aimed at retrofitting the Detroit Diesel Corporation (DDC) 6V-92TAC diesel engine in a GM RTSII bus to operate on methanol. The engine is modified by installing higher compression ratio pistons, higher flowrate mechanical fuel injectors, and a different blower. The bus fuel system is also modified to accommodate the properties of methanol. New fuel lines are installed, and the diesel fuel tank is replaced with two stainless steel tanks. A high-pressure electric fuel pump and a fuel cooler are used to prevent methanol from boiling in the engine. Currently, three buses have been retrofitted. The buses operate at the Southern California Rapid Transit District (SCRTD) in Los Angeles, California.
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Citation
Wuebben, P., Unnasch, S., Pellegrin, V., Quigg, D. et al., "Transit Bus Operation with a DDC 6V-92TAC Engine Operating on Ignition-Improved Methanol," SAE Technical Paper 902161, 1990, https://doi.org/10.4271/902161.Also In
References
- April 1990
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- Jackson, M.D. Unnasch, S. Sullivan, C. Renner, R. A. “Transit Bus Operation with Methanol Fuel,” SAE Paper 850216 February 1985
- Jackson, M.D. Unnasch, S. Lowell, D. D. “Heavy-Duty Methanol Engines-Wear and Emissions,” Eighth International Symposium on Alcohol Fuels Tokyo, Japan November 1988