【作者】

Henning Pasligh

【摘要】

该论文已在赫尔辛基举行的第28届CIMAC世界大会上发表，论文的版权归CIMAC所有。 For combustion engines the specific fuel consumption is significantly affected by friction losses, from which a major part comes from the friction of the piston group. The tribology of the piston group, however, is strongly dependant on the piston stroke and the corresponding working cycle. At the Institute of Technical Combustion (ITV) at University of Hannover the friction of the piston group is therefore investigated under fired engine conditions on a heavy-duty diesel single cylinder research engine. Previous work with locally microstrucuted cylinder liner surfaces (manufactured by the Institut für Fertigungstechnik und Werkzeugmaschinen, [ULM13a], [ULM13b] and [DEN15]) showed a substantial reduction of the total engine friction (in some situations up to 19%) and a predominantly decrease of oil related exhaust emissions. While these experiments were carried out using the integral determination of the total engine frictional losses, the ITV has built a new Floating-Liner measurement system [ULM15], allowing now a detailed, crank-angle resolved analysis of the piston group friction force for heavy-duty diesel engine conditions. Actually, the impact of locally positioned microstructures can be investigated, allowing the variation of the specific layouts regarding e.g. the density of the microstructures on the liner surface. The paper describes the Floating-Liner measurement system with its components in detail and shows first crank-angle resolved measurements of the friction under fired engine conditions.

【会议名称】

第28届CIMAC会议

【会议地点】

芬兰 赫尔辛基

【下载次数】

2

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