This investigation assesses the benefits of retrofitting a diesel micro-pilot ignition system on a Cooper-Bessemer GMV-4TF two-stroke cycle natural gas engine with a 14” (36 cm) bore and a 14” (36 cm) stroke. The pilot fuel injectors are mounted through an adaptor in one of the spark plug holes in a set of dual-spark plug heads. A high pressure, common-rail, diesel fuel delivery system is employed and customizable power electronics control the current signal to the pilot injectors. Pilot fuel is supplied by a variable displacement, high-pressure pump that is driven with an electric motor. Software is developed that interfaces with the pump and controls and monitors the fuel rail pressure. Micro-pilot quantities from 11.5 to 20 mm3 (.0007 to .0012 in3) are explored at rail pressures from 200 to 1400 bar (2,900 to 20,300 psig). Three independent variables, pilot ignition timing, pilot fuel quantity, and pilot fuel rail pressure, are manipulated. An optimization sequence is performed to minimize total fuel consumption.
- Internal Combustion Engine Division and Rail Transportation Division
On-Engine Demonstration of Micro-Pilot Ignition System for a Cooper-Bessemer GMV-4TF
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Brown, JA, Mizia, J, Olsen, DB, & Wilson, BD. "On-Engine Demonstration of Micro-Pilot Ignition System for a Cooper-Bessemer GMV-4TF." Proceedings of the ASME 2003 Internal Combustion Engine and Rail Transportation Divisions Fall Technical Conference. Design and Control of Diesel and Natural Gas Engines for Industrial and Rail Transportation Applications. Erie, Pennsylvania, USA. September 7–10, 2003. pp. 295-301. ASME. https://doi.org/10.1115/ICEF2003-0762
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