Josef Edtmayer- Graz University of Technology
Josef Edtmayer
- Graz University of Technology
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10
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Introduction
Current institution
Publications
Publications (10)
div class="section abstract"> The further increase in the efficiency of heavy-duty engines is essential in order to reduce CO<sub>2</sub> emissions in the transport sector. This is also valid for the future use of alternative fuels, which can be CO<sub>2</sub>-neutral, but can cause higher total costs of ownership due to higher prices and limited a...
Für die Realisierung der in Paris definierten Klimaschutzziele wird die Optimierung des Verbrennungsmotors weiterhin eine tragende Rolle spielen. Sowohl für den Kleinmotor im Hybridantrieb als auch für den Großmotor in Nutzfahrzeugen und Baumaschinen hat eine Effizienzsteigerung höchste Priorität. Maßnahmen zur Reduktion der mechanischen Verluste w...
Current requirements for the reduction of CO2 emissions, as well as for the improvement of durability and reliability of sociotechnical systems such as passenger cars, lead to an increase in development effort in order to increase efficiency and system lifetime. Tribological systems play an essential role in the development of sociotechnical system...
Engine crank case designs for passenger car applications are based today on two main material technologies: grey cast iron and an increasing share of aluminium-based concepts. Due to the low wear resistance of aluminium, the latter concepts require a wear protective layer for the cylinder bore surface. Iron-based thermal spray coats are widely used...
The optimization of the piston/bore interface still provides big challenges within engine development. This tribological system is highly stressed by the high temperature conditions as well as highly dynamic motions and forces. Furthermore, optimization is a tradeoff between reducing friction losses, extending durability and improving the sealing p...
Bei Motorneuentwicklungen werden Reibungs- und Verschleißbetrachtungen immer stärker in den Fokus rücken. Es gilt ein Optimum aus reibungsminimierenden Maßnahmen und Maßnahmen zur Senkung von Ölverbrauch sowie Blow-By zu finden, ohne dabei die Motorlebensdauer zu vermindern. Die Anforderungen an zukünftige Motorkonzepte im Hinblick auf Abgaswerte u...
