ICE2025+: Ultimate System Efficiency

Authors

C. Wouters, S. Pischinger, VKA, RWTH Aachen University; A. Kuznik, C. Beidl, TU Darmstadt; F. Negüs, M. Bargende, University of Stuttgard; E. Wenz, P. Eilts, TU Braunschweig

Summary

CO2 targets in the range of 68 to 75 gCO2/km are expected from 2025 onwards within the European Union. This ambitious goal will only be achieved with a great penetration depth of hybridized powertrains. From this the task for each OEM can be derived to develop a propulsion system with a favorable cost-to-CO2-benefit ratio. An integral part of such a system will most likely be a spark-ignited combustion engine. That engine has to deliver an overall efficiency close to the theoretical optimum efficiency in engine operating points most relevant for hybrid operation strategies. Therefore, the goal of the project was the optimization of the combustion engine under real world conditions aiming for an overall engine efficiency close to 45 % in engine operation points relevant for operation of HEVs...

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