Dissertation, 2016
from Dr.-Ing. Sebastian Wohlgemuth
Abstract
Concepts for future mobility have to focus on low greenhouse gas and pollutant emissions, while ensuring an efficient use of resources. Especially for applications in compact passenger cars, low system costs have to be realized. Furthermore, a suitable fuel for sustainable mobility has to be chosen. In the presented research project a drivetrain concept for urban and commuter traffic is developed with regard to these aspects. Therefore, a two-cylinder engine is combined with a hydraulic hybrid system. A lean-burn natural gas combustion concept is pursued for the internal combustion engine. The research examines the geometry of the combustion chamber, the ignition system, the charging concept and the exhaust gas aftertreatment. Different concepts and approaches are developed and investigated in simulations and experiments. The hybrid system is designed with regard to the requirements of the drivetrain and the vehicle operation. One main focus is to present a system with low complexity, realizing the funcionalities of a full hybrid system as start-stopp, boost, recuperation and operation point shift at the same time. Finally, the drivetrain concept is evaluated in an entire vehicle simulation. It is analyzed whether the legal requirements as well as a realistic driving cycle can be met by the introduced drivetrain.
Extent: 138 pages
ISBN: 978-3-943813-19-7
Price: 33 € ( 2 € for dispatch)
Ordering: verlag@lvk.mw.tum.de