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Injection Strategies for Operational Improvement of Diesel Dual Fuel Engines under Low Load Conditions
ISSN: 0148-7191, e-ISSN: 2688-3627
Published June 15, 2009 by SAE International in United States
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Diesel Dual Fuel (DDF) operation is a promising alternative engine operating mode. Previous research studies have reported a DDF engine operating under low load conditions suffers from high HC emissions, mostly Methane. The current study investigated the use of a multiple direct injection strategy for improvement of low-load DDF operation in a commonrail direct injection single-cylinder diesel engine. Natural gas was supplied at 70% of energy replacement ratio.
Results indicated that depending on engine conditions, a double-pulse injection had potential for combustion control and provided an effective way to reduce NOx and methane emissions. Moreover, the double-pulse injection helped improve the combustion stability, reduce the pressure rise rate, and decrease the maximum cylinder pressure, compared to DDF operation with a single pulse injection. Under low load conditions, the tuned injection strategies demonstrated significant operational improvement comparing with a simple DDF conversion that used the same injection timings as that of conventional diesel operations.
CitationAroonsrisopon, T., Salad, M., Wirojsakunchai, E., Wannatong, K. et al., "Injection Strategies for Operational Improvement of Diesel Dual Fuel Engines under Low Load Conditions," SAE Technical Paper 2009-01-1855, 2009, https://doi.org/10.4271/2009-01-1855.
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