10.18453/rosdok_id00001041 Reißig, Martin Martin Reißig http://d-nb.info/gnd/1027030963 Universität Rostock 2011 620 Engineering & allied operations 2011 en http://purl.uni-rostock.de/rosdok/id00001041 urn:nbn:de:gbv:28-diss2012-0080-0 The aim of this work is to show a model approach capable of describing the SI engines cold start. The model bases upon a zero-dimensional thermodynamic description of the various gas components. A description of the combustion of homogeneous as well as stratified charges by a fractal approach for the fully established turbulent flame proved to be successful. The cylinder pressure is transferred via a mechanical model of the power train into a driving torque. Quantifying loss torques as well as inertias in addition to this driving torque enables the simulation of the engine run-up.