ICE 2030 - Limits of SI engine efficiency in hybridised powertrains

Autoren

P. Eilts, C. Beidl, A. Casal Kulzer, M. Bargende, S. Pischinger, A. Kuznik, F. Negüs, V. Kelich, E. Wenz, C. Göbel, A. Döhler - TU Braunschweig

Zusammenfassung

After the FVV project ICE2025+ was able to demonstrate a peak efficiency of a leanburn methanol engine of 46.8% with the associated vehicle efficiency of 44.7% (WLTC) respectively 49.5% (RDE), the follow-up project ICE2030 was to investigate the extent to which the admixture of small amounts of hydrogen can increase the efficiency potential of an optimized hybrid powertrain and reduced CO2 emissions.

To this end, various experimental and simulative investigations have been carried out over the past two years. First, tests were carried out on a single-cylinder engine to investigate the influence of the addition of hydrogen on the combustion process under variation of different efficiency-enhancing technologies. Simultaneously, the combination of hydrogen PFI and various directly injected liquid fuels was investigated on another single-cylinder engine. Then, the measurement data was used to develop and validate simulation models for the admixture of hydrogen to gasoline and methanol, respectively, for the engine and the complete vehicle. In order to determine the potentials of the newly developed engine concepts within different hybrid powertrains, the powertrain and engine combinations were analyzed using Dynamic Programming to tune and optimize two different hybrid control strategies: a rule-based strategy and an Equivalent Consumption Minimization Strategy.
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