Methode zur automatisierten Topologiesynthese und Bewertung hybrider Antriebsstränge

Abstract

The energy efficiency of hybrid electric vehicle drivetrains is in focus, as regulations force the vehicle manufacturers to reduce emissions. Therefore, in this paper, a method is described, that supports the developer in the early stage of product engineering [1], in the activities of detecting ideas by searching for alternative solutions. The method considers the system of objectives that has to be defined by the developer. Based on this, hybrid electric drivetrains topologies are synthesized automatically and investigated regarding their energy efficiency and performance. An automated rating process with an integrated weighting procedure that considers the system of objectives and a cost calculation, evaluates the topology investigations and gives the developer a topology ranking.

Systematic synthesis and multi-criteria evaluation of transmission topologies for electric vehicles

“…The method is verified using a state-of-the-art hybrid powertrain of a passenger vehicle. For this example, a period of "one day" is stated to get more than 100 rated topologies [25].…”

Introduction and Investigation of a Method for the Synthesis and Selection of Hybrid Electric Vehicle Drivetrain Design in the Early Stage of Product Generation Engineering (Pge)

“…By applying graph theory to the mathematical description of powertrain topologies, constraint satisfaction problems can be described by rules and solved by algorithms (Dechter and Cohen, 2003). Thus, hybrid powertrain topologies can be generated automatically for defined solution spaces and then stored in matrices (Ruoff et al, 2019a).…”

“…As part of the fuel consumption simulation, the corresponding driving cycle is stored depending on the system of objectives and driven through with a full and empty battery in order to calculate the fuel consumption in accordance with the standard. In addition, acceleration and maximum speed simulations are carried out, with the help of which the results can be used to check the fulfilment of the requirements in the automated evaluation with regard to performance (Ruoff et al, 2019a).…”

“…Particularly considering the fact that due to the early development stage in which the method is to be used, the drive machines used are only in the same power range and the exact characteristic map of the drive machines of the comparison vehicle is unknown. (Ruoff et al, 2019a) In the second study, which was performed with 15 test persons that have experience in drivetrain development, the aim was to evaluate the applicability of the software tool and the developed method.…”