Resource-efficient piston ring / cylinder liner-pairing

• Applicants: Professor Dr.-Ing. Dirk Bartel, since 11/2016; Professor Dr.-Ing. Bernhard Karpuschewski
• Subject Area: Engineering Design, Machine Elements, Product Development ; Metal-Cutting and Abrasive Manufacturing Engineering
• Term: from 2011 to 2019
• Project identifier: Deutsche Forschungsgemeinschaft (DFG) - Project number 200358499

The piston ring / cylinder liner pairing significantly influences the friction losses and therefore the fuel consumption of combustion engines. According to the current state of the art, it would be possible to condition the piston ring / cylinder liner pairing by an optimized running-in, so that a very small wear rate and low friction during normal operation is setted. This fact is not been implemented in practice. Reasons therefore are, that the running-in is too long, too expensive and can not be done by the customer. In addition, there may be spontaneous failures during running-in. Further, the processes occurring during running-in on the surface of the cylinder liner and in the boundary layers have not yet been fully understood. If it is possible to produce such surface topographies and boundary layers already during finishing of the cylinder liners which correspond largely to those after the optimized running-in, low wear and low friction could be achieved without running-in.The aim of the planned research project is to adjust the surfaces and boundary layers of the cylinder liner, relating to surface topography, microstructure, chemical composition and strength according to the optimized running-in already during finishing. Such optimized surfaces feature equally low wear rate and comparatively low friction compared to surface with an optimized running-in. This goal will be realized through a close integration of research activities in the fields of tribology and manufacturing technology .

• DFG Programme: Priority Programmes
• Subproject of: SPP 1551: Resource Efficient Constructional Elements
• Ehemaliger Antragsteller: Professor Dr.-Ing. Ludger Deters, until 10/2016