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Combustion of Biodiesel- and Ethanol-Diesel Intake Injection Mixtures with
Technical Paper
2007-01-4011
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Event:
SAE 2007 Commercial Vehicle Engineering Congress & Exhibition
Powertrain & Fluid Systems Conference and Exhibition
Language:
English
Abstract
Seven biofuel-diesel fuel configurations were tested in a single-cylinder research diesel CFR engine that allowed variable injection timing. These seven configurations included three biodiesel-diesel blends (20% and 100%); two ethanol-diesel blends (15% and 20%), and two cases in which ethanol was injected into the intake air flow (20% and 33%). Combustion characteristics, NOx emissions, and soot emissions were compared with diesel operation across a range of injection timings. The effect of fuel compressibility affected the timing of injection, with biodiesel-diesel blends having advanced injection and ethanol-diesel blends having delayed injection. Biodiesel-diesel blends showed reduced ignition delay with only modest changes in combustion duration, while ethanol-diesel mixtures showed longer ignition delay but much shorter combustion duration and earlier phasing. In general, all the biofuel-diesel configurations improved thermal efficiency (∼3% relative) but increased fuel consumption to a greater extent due to lower energy content. None of the seven configurations had a large effect on NOx emissions. Soot was slightly lower for both biodiesel-diesel and blended ethanol-diesel. However, premixing ethanol with intake air using a port-fuel injector lowered soot by approximately 50%.
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Authors
- D. M. Leahey - United States Naval Academy
- B. C. Jones - United States Naval Academy
- J. W. Gilligan - United States Naval Academy
- L. P. Brown - United States Naval Academy
- L. J. Hamilton - United States Naval Academy
- C. E. Gutteridge - United States Naval Academy
- J. S. Cowart - United States Naval Academy
- P. A. Caton - United States Naval Academy
Topic
Citation
Leahey, D., Jones, B., Gilligan, J., Brown, L. et al., "Combustion of Biodiesel- and Ethanol-Diesel Intake Injection Mixtures with," SAE Technical Paper 2007-01-4011, 2007, https://doi.org/10.4271/2007-01-4011.Also In
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