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Due to actual legislative regulations for automotive industry implying a cap of average 95 g CO2/km for an OEM’s fleet by 2020 an overall increase of vehicles’ efficiency is necessary. Areas which can contribute significantly to this ambitious goal are among others light weight design, downsizing, the reduction of frictional losses and hybridization. Looking onto the topic of hydrodynamic journal bearings in internal combustion engines (ICE) in this context, performed actions lead to higher specific loads and imply hindered conditions. As a consequence the chance of wear and failure increases which needs to be taken into account in a machines design by numerical wear assessments. One of the most prominent wear models goes back to Archard [1]. Based on material parameters and an empirical coefficient this model allows a numerical implementation in the multiphysics simulation software COMSOL [2], [3]. In the following journal bearings’ characteristics as well as the impact of actual developments on journal bearings is described with the help of Stribeck-curves. The tribological test methodology developed at the Chair of Mechanical Engineering to calculate necessary wear coefficients of arbitrary material combinations by using a rotationary tribometer TE92HS in combination with a journal bearing adapter (JBA) follows this first part. The setting of the numerical model of the JBA is described and finally numerical and test results are compared.

Methodology Development for Numerical Evaluation of Wear in Tribological Contacts