Optimal Hybrid Drive Configuration for Synthesized ICE

In order to reduce the emission in individual traffic electrification and hybridization is needed. The emission reduction depends on the degree of electrification and the specific drive system design and optimized components. This applies especially for hybrids with the highest amount of components, consisting of internal combustion engine, transmissions, electric motors and batteries. With the integration of the EM in the transmission for dedicated hybrid transmissions, the amount possible solutions and variants lies in the billions. Hence for the development of new drive architectures computer aided drive synthesis are needed. In a DFG funded project we developed a drive synthesis, including an ICE synthesis as well as transmission synthesis. The syntheses are controlled via an artificial intelligence based control algorithm including engineering knowledge. In this paper we are focusing on the impact the ICE concept has on the drive system dimensioning, the fuel economy, performance as well as operation behavior on a parallel hybrid configuration. In addition to different ICE concepts, the electrical power is also varied in order to discuss the relation between electrical and combustion engine power share in the vehicle and its implications. Furthermore, the change and impact on the operation behavior to generate the best fuel consumption is discussed for the different drive systems as well as the resulting most promising concept.