Reduction of Torsional Vibrations of Hybrid Drives when Using a Low Number of Cylinders

Authors

em. Univ.-Prof. Dr.-Ing. G. Hohenberg, IVD Prof. Hohenberg GmbH, Graz; Univ.-Prof. Dr. C. Beidl, Darmstadt University of Technology; Dr. D. Höfler, tectos gmbH, Graz

Year

2013

Print Info

Fortschritt-Berichte VDI, Reihe 12, Nr. 764

Summary

Plug-in hybrid drives will be, in the foreseeable future, the dominant variant for the electrification of vehicles, with the trend clearly pointing to combustion engines with a low number of cylinders and a low operating speed. However, the considerable torsional vibration and its impact on the power train as well as the engine mount pose a problem. The conventional mechanical solutions with dual mass flywheels and pendulum support etc. have clearly reached their limit, when it comes to improving the noise vibration harshness (NVH) behavior. Operating the drive engine with low speed values which are relevant for the fuel consumption is therefore only possible to a limited extent.

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