In this study, the influence of the charge motion on the internal combustion in a spark ignition sewage gas-driven engine (150 kW) for combined heat and power units was investigated. For this purpose, the geometry of the combustion chamber in the immediate vicinity to the inlet valve seats was modified. The geometrical modification measures were conducted iteratively by integrative determination of the swirl motion on a flow bench, by laser-optical methods and consecutively by combustion analysis on a test engine. Two different versions of cylinder heads were characterized by dimensionless flow and swirl numbers prior to testing their on-engine performance. Combustion analysis was conducted with a cylinder pressure indication system for partial and full load, meeting the mandatory NOx limit of 500 mg m−3. Subsuming the flow bench results, the new valve seat design has a significant enhancing impact on the swirl motion but it also leads to disadvantages concerning the volumetric efficiency. A comparative consideration of the combustion rate delivers that the increased swirl motion results in a faster combustion, hence in a higher efficiency. In summary, the geometrical modifications close to the valve seat result in increased turbulence intensity. It was proven that this intensification raises the ratio of efficiency by 1.6%.
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ASME 2017 Internal Combustion Engine Division Fall Technical Conference
October 15–18, 2017
Seattle, Washington, USA
Conference Sponsors:
- Internal Combustion Engine Division
ISBN:
978-0-7918-5831-8
PROCEEDINGS PAPER
Optimization of the Charge Motion in Internal Combustion Engines Driven by Sewage Gas for CHP-Units
Lucas Konstantinoff,
Lucas Konstantinoff
MCI Innsbruck, Innsbruck, Austria
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Lukas Möltner,
Lukas Möltner
MCI Innsbruck, Innsbruck, Austria
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Martin Pillei,
Martin Pillei
MCI Innsbruck, Innsbruck, Austria
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Thomas Steiner,
Thomas Steiner
MCI Innsbruck, Innsbruck, Austria
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Thomas Dornauer,
Thomas Dornauer
MCI Innsbruck, Innsbruck, Austria
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Günther Herdin,
Günther Herdin
PGES GmbH, Jenbach, Austria
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Dominik Mairegger
Dominik Mairegger
MCI Innsbruck, Innsbruck, Austria
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Lucas Konstantinoff
MCI Innsbruck, Innsbruck, Austria
Lukas Möltner
MCI Innsbruck, Innsbruck, Austria
Martin Pillei
MCI Innsbruck, Innsbruck, Austria
Thomas Steiner
MCI Innsbruck, Innsbruck, Austria
Thomas Dornauer
MCI Innsbruck, Innsbruck, Austria
Günther Herdin
PGES GmbH, Jenbach, Austria
Dominik Mairegger
MCI Innsbruck, Innsbruck, Austria
Paper No:
ICEF2017-3529, V001T03A003; 10 pages
Published Online:
November 30, 2017
Citation
Konstantinoff, L, Möltner, L, Pillei, M, Steiner, T, Dornauer, T, Herdin, G, & Mairegger, D. "Optimization of the Charge Motion in Internal Combustion Engines Driven by Sewage Gas for CHP-Units." Proceedings of the ASME 2017 Internal Combustion Engine Division Fall Technical Conference. Volume 1: Large Bore Engines; Fuels; Advanced Combustion. Seattle, Washington, USA. October 15–18, 2017. V001T03A003. ASME. https://doi.org/10.1115/ICEF2017-3529
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