ISBN 978-3-8439-1920-3

978-3-8439-1920-3, Reihe Ingenieurwissenschaften

Robert Huber
Dynamics of Variable Valve Trains and Extrapolation Methods for Time-Stepping Schemes

163 Seiten, Dissertation Technische Universität München (2012), Softcover, A5

Zusammenfassung / Abstract

Set-valued force laws and time-stepping integration schemes are used in the context of multi-body simulation for efficient and physically based modelling of technical systems with friction and impacts. In the first part of this thesis, step size adjustment and extrapolation methods are adapted to non-smooth mechanics to improve time-stepping schemes with regard to integration order and time discretisation. Furthermore, parallel computing techniques are applied within this approach to reduce computational time for numerical integration. In the second part, the developed methods are used for the simulation of the variable valve train system AVS (Audi valvelift system). A detailed model of the components and of the entire valve train is built up and validated. The dynamics of the mechanical, electro-magnetic, and hydraulic subsystems as well as the complete system including the chain drive are analysed by simulation and experiment.