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.
In this paper, a method is presented, that supports the developer in the development of hybrid electrical vehicle drivetrains. The developer gets support in the early stage of product generation engineering, beginning with the definition of the system of objectives, via the automated synthesis and investigation of the drivetrain topologies, ending with a topology ranking, which is related to the system of objectives, and a similarity analysis. As the method is implemented in a tool, the results of the tool and its usability are investigated within two comprehensive descriptive studies.
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