Publikationsrepositorium - Helmholtz-Zentrum Dresden-Rossendorf
2 PublikationenTetrahedral amorphous carbon coatings for friction reduction of the valve train in internal combustion engines
Götze, A.; Makowski, S.; Kunze, T.; Hübner, M.; Zellbeck, H.; Weihnacht, V.; Leson, A.; Beyer, E.; Joswig, J.-O.; Seifert, G.; Abrasonis, G.; Posselt, M.; Fassbender, J.; Gemming, S.; Krause, M.
Abstract
Tetrahedral amorphous carbon (ta-C) is studied as a tribological coating for the valve train’s exhaust camshaft of a combustion engine. The coated camshafts were installed in a non-fired engine, tested in a computerized component test bench under practice-relevant conditions and analyzed for their frictional behavior. A notable reduction of the valve train’s drive torque on the test bench is demonstrated. Namely, on a roller cam system with ta-C coated camshaft the reduction is about 15% in average within the entire engine-map. The ta-C coatings were extensively characterized under laboratory conditions before and after the investigations on the test bench. Mechanistic understanding of the tribological behavior of ta-C coatings under dry or starving lubricated conditions was achieved by atomistic simulations of the tribological contact. Industrial utilization of these results would lead to a significant increase of the energy efficiency of combustion engines.
Keywords: tribological coatings; tetrahedral amorphous carbon (ta-C); combustion engines; atomistic simulations
Beteiligte Forschungsanlagen
- Ionenstrahlzentrum DOI: 10.17815/jlsrf-3-159
Verknüpfte Publikationen
- DOI: 10.17815/jlsrf-3-159 is cited by this (Id 21009) publication
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Advanced Engineering Materials 16(2014), 1226-1233
DOI: 10.1002/adem.201400188
Cited 13 times in Scopus -
Poster
Plasma Surface Engineering 2016, 11.-16.09.2016, Garmisch-Partenkirchen, Deutschland
Permalink: https://www.hzdr.de/publications/Publ-21009