Abstract
The paper explains the influence of the transmission on the energy consumption of a vehicle. In addition to the efficiency of the transmission, the conversion quality has been introduced, which quantifies how efficiently the transmission can operate the connected drive machine. Conversion quality and transmission efficiency influence the energy consumption in different ways. Therefore, the transmission effectiveness is developed to be able to compare different transmissions directly with one another using just one parameter. The higher the transmission effectiveness, the more efficient the transmission operates in the overall context of the drive concept. Furthermore, the transmission effectiveness quantifies the consumption potential of the considered transmission concept. It is described that in the case of conventional drives, an increase in the conversion quality due to an increased ratio spread has led to reductions in energy consumption, although additional mechanical components tend to result in higher mechanical transmission losses. In the case of electrified drives, however, these correlations are reversed. As the recuperation becomes more efficient, especially through an increase in the transmission efficiency, the transmission efficiency will become increasingly important. At the same time, the electrification allows a significant improvement in the conversion quality with the same transmission concept. Due to these fundamentals, dedicated hybrid transmissions will be a key technology to further reduce the energy consumption of hybrid vehicles.
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Abbreviations
- AMT:
-
Automated manual transmission
- AT:
-
Automatic transmission
- BEV:
-
Battery electric vehicle
- CVT:
-
Continuously variable transmission
- DCT:
-
Dual clutch transmission
- DHT:
-
Dedicated hybrid transmission
- DM:
-
Drive machine
- EV:
-
Electric vehicle
- GE:
-
Transmission effectiveness (German: Getriebeeffektivität)
- HEV:
-
Hybrid electric vehicle
- ICE:
-
Internal combustion engine
- ICV:
-
Internal combustion engine vehicle
- MM:
-
Multi mode
- MT:
-
Manual transmission
- TM:
-
Transmission
- PS:
-
Power split
- WLTP:
-
Worldwide harmonized light vehicles test procedure
References
Küçükay, F., Li, L., Lange, A.: Highly fuel-efficient transmission and propulsion concepts, Der Antrieb von morgen 2017, 11. internationale MTZ-Fachtagung Zukunftsantriebe, Frankfurt am Main, 2017
Lange, A., Küçükay, F.: A new, systematic approach to determine the global energy optimum of a hybrid vehicle, automotive and engine technology, The International Journal of WKM, ISSN:2365–5127, Springer International Publishing Switzerland, 2016
Seidel, T., Lange, A., Küçükay, F.: DHT concepts based on DCT design. VDI-Getriebekongress, Bonn, 2017
Seidel, T., Lange, A., Küçükay, F.: Modular DCT-design for electrified powertrains. In: CTI Symposium USA, Novi, MI, 2015
Lange, A., Küçükay, F.: Potentials of predictive control strategies. CoFAT 2017, Fürstenfeldbruck, 2017
Küçükay, F.: Rechnergestützte Getriebedimensionierung mit repräsentativen Lastkollektiven. Automobiltechnische Zeitschrift ATZ, 1990
Lange, A., Li, L., Küçükay, F.: Evaluation and optimization of innovative hybrid drives. CoFAT 2016, Fürstenfeldbruck, 2016
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Lange, A., Küçükay, F. Benchmark parameters of transmissions. Automot. Engine Technol. 3, 1–10 (2018). https://doi.org/10.1007/s41104-017-0022-8
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DOI: https://doi.org/10.1007/s41104-017-0022-8