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Petroleum-Based and Bio-Derived Jet Fuel Efficiency Optimization Using Fuel Injection in a 34cc 4- Stroke Spark-Ignition Engine
Technical Paper
2011-32-0601
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
Many of the engines used in Remotely Piloted Aircraft (RPA), come directly from the remote-control (R/C) aircraft market, which turn a propeller but are not necessarily built for the greatest efficiency or reduced fuel consumption. The DoD “single fuel concept” is pushing these platforms to be able to operate with JP-8 using an Otto Cycle engine. Additionally, with increased environmental concern with fossil fuels, possible future DoD requirements could require the use of bio-derived liquid fuels.
The research presented in this paper takes steps to satisfying both the efficiency and single fuel requirements. The Fuji BF-34EI engine was successfully shown to operate effectively with JP-8, Diesel, Algae-based Diesel and Camelina based Hydroprocessed Renewable Jet fuel. When generally compared over the entire engine operating map, between AVGAS and JP-8, the latter is shown to present a 10-20% lower brake specific fuel consumption (BSFC). When variable spark ignition is used for running the heavy fuels, allowing for a greatly retardation in timing, knock is shown to be eliminated. Comparing to the fielded system (AVGAS Carbureted), yielded a decrease in specific fuel consumption of up to 43% and 54% for JP-8 and Camelina, respectively. Using fuel injection and spark optimization with the heavy fuels, BSFC was decreased by up to 14% and 32% for JP-8 and Camelina, respectively, when compared to AVGAS.
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Wilson, C., Schauer, F., Litke, P., Hoke, J. et al., "Petroleum-Based and Bio-Derived Jet Fuel Efficiency Optimization Using Fuel Injection in a 34cc 4- Stroke Spark-Ignition Engine," SAE Technical Paper 2011-32-0601, 2011, https://doi.org/10.4271/2011-32-0601.Also In
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