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The Isochoric Engine
ISSN: 0148-7191, e-ISSN: 2688-3627
To be published on April 14, 2020 by SAE International in United States
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For the gasoline engine, the isochoric process is the ideal limit of the ideal processes. During the project, a combustion engine with real isochoric boundary conditions is built.
A “resting time” of the piston for several degrees crank angle in the top dead center (TDC) can be realized with a special crank drive. This crank drive consists of two crankshafts with different strokes, which are combined. The two crankshafts rotate with a ratio of two to one in opposite directions.
The total stroke corresponds to the amount of the first crankshaft, so it is possible to investigate different strokes of the second crankshaft in the same crankcase. Different “resting times” can be achieved by different strokes of the second crankshaft. A specific combination of both crankshafts make a stroke possible which corresponds to that of a conventional combustion engine.
In addition to the standard cylinder pressure sensor, a quick surface temperature probe is also used as supplementary measurement technology. The influence of isochoric combustion is studied with constant air mass and constant lambda at three different strokes of the small crankshaft.
CitationBurger, B. and Bargende, M., "The Isochoric Engine," SAE Technical Paper 2020-01-0796, 2020.
Data Sets - Support Documents
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- Bargende, M. , “Grundlagen der Verbrennungsmotoren”, Lecture manuscript, University Stuttgart, 2 Edition.
- van Basshuysen, R. and Schäfer, F. , “Handbuch Verbrennungsmotor. Grundlagen, Komponenten, Systeme, Perspektiven,” ATZ/MTZ-Fachbuch, Springer Vieweg, Wiesbaden, 2015, doi:10.1007/978-3-658-04678-1.
- “Kistler Datasheet for TDC Encoder Typ 2629DK Version,” 2018, https://www.kistler.com/?type=669&fid=80921&model=document.
- Bargende, M. , “Ein Gleichungsansatz zur Berechnung der instationären Wandwärmeverluste im Hochdruckteil von Ottomotoren,” Dissertation University Darmstad, 1991.