The Opportunities for Powertrain Provided by the 48V Electrical System

Authors

Dipl.-Ing. J. Bast, Dr. rer. nat. M. Kilger, W. Galli, Dipl.-Ing. A. Eiser, Dipl.-Ing. H.-W. Vaßen,
Dipl.-Ing. I. Kutschera, AUDI AG, Ingolstadt / Neckarsulm

Year

2013

Print Info

Fortschritt-Berichte VDI, Reihe 12, Nr. 764

Summary

This article describes the opportunities opened up for the powertrain by the 48-Volt vehicle electrical system. As an initial step, motivation for a higher voltage in the vehicle’s electrical system is defined, after which the layout and components of a dual-voltage system are explained. The central focus of this article, as well as outlining the advantages of electrification in tandem with the internal combustion engine and the opportunity to adopt an electric bi-turbo concept, describes the Audi iHEV 48V mild hybrid concept, which is based on a dual-voltage vehicle electrical system and makes maximum use of the advantages it offers for the powertrain. To make the picture more complete, the benefits of the dual-voltage electrical system for the vehicle as a whole are then discussed.

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