Plug-in hybrid electric vehicle powertrain dimensioning under consideration of emission reduction targets, powertrain cost and modularity

摘要

In this paper we present a process to dimension and identify the optimal dimensioning of powertrain components. For this, a validated tool for an automated powertrain dimensioning developed at the Institute of Automotive Engineering, has been extended for the optimization of powertrains. This tool enables OEMs to dimension and optimize hybrid electric vehicle powertrains for fleet applications solely by basic vehicle parameters and a catalog of requirements for a given driving cycle and customer use in early stages of development, which reduces costs, development time and the amount of testing. The integration of fleet applications allows a fleet optimal dimensioning of powertrain components and can be extended for the optimization of a powertrain mixture of conventional, hybrid and electric drives. The tool is used for an explanatory plug-in hybrid vehicle fleet in order to determine the optimum between emissions based on the WLTP, powertrain costs and modularity between different vehicle classes and vehicle variants. By taking the costs for a hybrid powertrain on component level into account an optimal powertrain dimensioning for vehicles in different variants can be calculated.