Author
Steffen Klan
Bio: Steffen Klan is an academic researcher. The author has an hindex of 1, co-authored 1 publications receiving 20 citations.
Papers
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01 Jun 2004
20 citations
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14 Oct 2014
6 citations
01 Jan 1998
5 citations
BorgWarner Inc.1, University of Stuttgart2, Opel3, Daimler AG4, Mobil5, AVL6, KSPG Automotive AG7, Bosch8
TL;DR: In this paper, the advantages of the main fuel content of a natural gas vehicle are discussed based on the features of the primary fuel content, namely, its high possible ratio between hydrogen and carbon and the resulting features considering production/availability (fossil & renewable), the engine and environmental features make methane an ideal vehicle fuel.
Abstract: Natural gas vehicles are a mature technology already available today for solving the environmental problems caused by the automobile. The advantage is based on the features of the main fuel content methane. While keeping a minimum fuel quality standard, it is doesn’t matter to the vehicle technology whether the Methane is several million years old or just a few days. There is complete compatibility between fossil and renewable sources for this most simple of all hydrocarbons. Its highest possible ratio between hydrogen and carbon and the resulting features considering production/availability (fossil & renewable), the justifiable effort in the fuel system and the engine and environmental features make methane an ideal vehicle fuel.
4 citations
01 Jan 1991
TL;DR: Les alliages coules d'aluminium: tendances dans les applications and suppositions pour l'utilisation de leurs proprietes as discussed by the authors, a.k.a.
Abstract: Les alliages coules d'aluminium: tendances dans les applications et suppositions pour l'utilisation de leurs proprietes. Alliages d'aluminium etudies. Mise au point et evaluation des essais: effet de la structure sur la propagation des criques; proprietes mecaniques des eprouvettes coulees en sable et en coquille; l'integral J
4 citations
23 May 2012
TL;DR: In this paper, the influence of heat treatments on the elevated-temperature strength of Al-Si foundry alloys with Ni and analyzes the active strengthening mechanisms was discussed. But the effect of solution treatment was not investigated.
Abstract: Al-Si-Ni alloys can be considered as a coarse two-phase system where a hardening effect is caused by load transfer to an interconnected rigid network of eutectic Si and aluminides. In the course of a solution treatment the contiguity of the eutectic phase is reduced, which leads to a decrease of strength. However, solution treatment is necessary to obtain a high supersaturation of elements in the Al-solid solution, which contribute to high-temperature strength due to precipitation hardening. Despite Ostwald ripening, the distribution of secondary precipitates is still dense enough to act as dislocation obstacles, as was confirmed by TEM-analysis. This work discusses the influence of heat treatments on the elevated-temperature strength of Al-Si foundry alloys with Ni and analyzes the active strengthening mechanisms. In order to investigate the effect of a solution treatment on the high-temperature strength of Ni-containing Al-Si foundry alloys, the tensile properties of various eutectic alloys were determined at 250°C after long-time exposure to test temperature.
4 citations