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Thorsten Plum, Marius Wegener, Markus Eisenbarth, Ziqi Ye, Konstantin Etzold, Stefan Pischinger and Jakob Andert, "A Simulation-Based Case Study for Powertrain Efficiency Improvement by Automated Driving Functions," Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering, vol. 233 (5), pp. 1320–1330, April 2019.


An increasing level of driving automation and a successive electrification of modern powertrains enable a higher degree of freedom to improve vehicle fuel efficiency and reduce pollutant emissions. Currently, both domains themselves, driving automation as well as powertrain electrification, face the challenge of a rising development complexity with extensive use of virtual testing environments. However, state-of-the-art virtual testing environments typically strictly focus on just one domain and neglect the other. This paper shows the results of a simulation-based case study considering both domains simultaneously. The influence of energy saving automated functionalities on a conventional, a hybrid, and a pure electric powertrain are investigated for a carefully selected inner-city driving scenario. The vehicle simulation models for the different powertrain configurations are calibrated using test bench results and vehicle measurements. A model predictive acceleration controller is developed for realizing the speed optimization function. By considering traffic conditions such as traffic light schedules and a preceding vehicle as the boundary conditions, unnecessary accelerations and decelerations are avoided to reduce the energy demand. The case study is realized by applying this function to the three powertrains variants. As a final result, a clear difference in energy demand is observed: the hybrid powertrain benefits the most in terms of energy demand reduction in the given use case. The results clearly underscore that in future vehicle development programs, the powertrain and the real world driving functionalities have to be optimized simultaneously to minimize the energy demand during everyday vehicle operation.

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Thorsten Plum
Marius Wegener
Markus Eisenbarth
Ziqi Ye
Konstantin Etzold
Stefan Pischinger
Jakob Andert

BibTeX reference

    author = {Plum, Thorsten and Wegener, Marius and Eisenbarth, Markus and Ye, Ziqi and Etzold, Konstantin and Pischinger, Stefan and Andert, Jakob},
    doi = {10.1177/0954407018775182},
    title = {{A Simulation-Based Case Study for Powertrain Efficiency Improvement by Automated Driving Functions}},
    pages = {1320--1330},
    journal = {Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering},
    publisher = {SAGE Publications},
    month = {4},
    number = {5},
    volume = {233},
    year = {2019},

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