Details

Autor(en) / Beteiligte

• Götze, Andreas
• Makowski, Stefan
• Kunze, Tim
• Hübner, Matthias
• Zellbeck, Hans
• Weihnacht, Volker
• Leson, Andreas
• Beyer, Eckhard
• Joswig, Jan-Ole
• Seifert, Gotthard
• Abrasonis, Gintautas
• Posselt, Matthias
• Fassbender, Jürgen
• Möller, Wolfhard
• Gemming, Sibylle
• Krause, Matthias

Titel

Tetrahedral Amorphous Carbon Coatings for Friction Reduction of the Valve Train in Internal Combustion Engines

Ist Teil von

• Advanced engineering materials, 2014-10, Vol.16 (10), p.1226-1233

Ort / Verlag

Blackwell Publishing Ltd

Erscheinungsjahr

2014

Quelle

Wiley Online Library

Beschreibungen/Notizen

• 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. Tetrahedral amorphous carbon (ta‐C) is studied as a tribological coating for the valve train's exhaust camshaft of a combustion engine. A notable reduction of 15% in average of the valve train's drive torque on the test bench is demonstrated, and the ta‐C coatings were extensively characterized under laboratory conditions before and after running on the test bench.