Micro structure and run-in process influence on friction and wear intensity in the cam-tappet tribo-system including integral process and surface structuring developments

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The research project focuses on the tribological influences of microstructures in the cam-tappet-contact of modern combustion engines. The objective of the project is the evaluation of, via varia-ble fabrication methods applied surface textures by examination of the fluid-mechanical effects in thermo-elastohydrodynamic rolling contacts. The evaluation-criteria are based on friction- and wear-behavior during the running-in stage. The research method to be realized consists of nu-merical simulations and experimental analysis. The simulative prediction of the friction- and wear-behavior is based on a detailed, numerical model of the valve-operating mechanism, including the (elasto-)hydrodynamic lubrication in the tribological contacts and the dynamic tappet-motion. Ex-perimental studies on a high performance single-cam test-rig are initially realized with, via rapid-prototyping-method manufactured components. Concluding tests are performed for the specific evaluation of optimized manufacturing methods regarding the friction- and running-in-behavior.