Optimized Transmissions as the Result of an Integrated Powertrain Development Approach

Authors

Dipl.-Ing. E. Schneider, Dipl.-Ing. J. Müller, Dipl.-Ing. M. Leesch, Dipl.-Ing. R. Resch, IAV GmbH, Chemnitz

Year

2009

Print Info

Fortschritt-Berichte VDI, Reihe 12, Nr. 697

Summary

An integrated approach with optimum powertrain layout can make a significant contribution to meet the targets set for reducing fuel consumption and emissions while at the same time improving ride comfort and agility under economic constraints. Proceeding from the power and energy required, the following paper examines CO2-reducing potentials capable of being tapped on both the vehicle and drive side. In keeping with improved combustion-engine efficiency and the accompanying trend toward reducing swept volume and narrower engine-speed spacing, the transmission as well as the influence of the total ratio range and number of speeds play a key role in this context. It furthermore demonstrates how other potentials for reducing CO2 can be harnessed by integrating electric motors.

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