Real-driving-based comparison of the eco-impact of powertrain concepts using a data-driven optimization environment

Esser, A.; Eichenlaub, T.; Rinderknecht, S.

doi:10.51202/9783181023730-i-309

Cited by 2 publications

(1 citation statement)

References 9 publications

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“…To enable the extensive parameter studies in the design of BEV-powertrains that are necessary for this study, the DrOPs environment ("Driving-Optimal Powertrains") is used, which has been developed at IMS and been used for various publications [9,[17][18][19]. Details concerning the models used in this work are given in the following.…”

Section: Vehicle Model and Operating Strategymentioning

confidence: 99%

Potentials to reduce the Energy Consumption of Electric Vehicles in Urban Traffic

Eßer,

Mölleney,

Rinderknecht

2022

Dritev 2022

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By means of a parameter study using a detailed backwards facing model of the longitudinal vehicle dynamics, the design of the transmission ratio in battery electric vehicles (BEV) is analyzed for different driving cycles and it is shown that the electric consumption in urban operation can be significantly reduced by up-speeding the electric machine (EM) using a high 1 st transmission ratio. But this potential currently remains unused in fixed-speed BEV due to various additional driving requirements of extra-urban driving with higher vehicle speeds. For this reason, multi-speed BEV are further investigated as a solution to the conflicting design objectives. An additional parameter study for multi-speed BEV with two transmission ratios shows further potentials for the reduction of electric consumption both in urban and extra-urban driving scenarios. Furthermore, the more complex "Two-Drive-Transmission" (TDT) concept is investigated as a multi-speed BEV powertrain with two downsized EMs instead of one highpower EM and it is compared with the other BEV variants using a comparative optimization approach. The TDT uses low-cost and energetically efficient shifting devices based on the technology of an automated manual transmission with simple dog clutches without friction surfaces, allowing shifting without interruption of traction force. Dynamic programming is applied as operational strategy for all simulations considering shifting losses to achieve a benchmarking of the potentials of fixed-speed and multi-speed BEV.

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Section: Vehicle Model and Operating Strategymentioning

confidence: 99%

Potentials to reduce the Energy Consumption of Electric Vehicles in Urban Traffic

Eßer,

Mölleney,

Rinderknecht

2022

Dritev 2022

Self Cite

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Optimization Approach for Long-Term Planning of Charging Infrastructure for Fixed-Route Transportation Systems

Belmonte

Rinderknecht

2021

WEVJ

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As the electrification of the transportation sector advances, fleet operators have to rethink their approach regarding fleet management against the background of limiting factors, such as a reduced range or extended recharging times. Charging infrastructure plays a critical role, and it is worthwhile to consider its planning as an integral part for the long-term operation of an electric vehicle fleet. In the category of fixed route transportation systems, the predictable character of the routes can be exploited when planning charging infrastructure. After a prior categorization of stakeholders and their respective optimization objectives in the sector coupling domain, a cost optimization framework for fixed route transportation systems is presented as the main contribution of this work. We confirm previous literature in that there is no one-fits-all optimization method for this kind of problem. The method is tested on seven scenarios for the public transport operator of Darmstadt, Germany. The core optimization is formulated as a mixed integer linear programming (MILP) problem. All scenarios are terminated by the criterion of a maximum solving time of 48 h and provide feasible solutions with a relative MIP-gap between 7 and 24%.

show abstract

Real-driving-based comparison of the eco-impact of powertrain concepts using a data-driven optimization environment

Cited by 2 publications

References 9 publications

Potentials to reduce the Energy Consumption of Electric Vehicles in Urban Traffic

Potentials to reduce the Energy Consumption of Electric Vehicles in Urban Traffic

Optimization Approach for Long-Term Planning of Charging Infrastructure for Fixed-Route Transportation Systems

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