Customer-focussed Gasoline Engine Technologies for the Future – Today and Tomorrow

Authors

Dipl.-Ing. P. Lückert, Dipl.-Ing. J. Frey, Dipl.-Ing. R. Kemmler, Dipl.-Ing. U. Schaupp, Dipl.-Ing. G. Vent, Dipl.-Ing. A. Waltner, DaimlerChrysler AG, Stuttgart

Year

2005

Print Info

Fortschritt-Berichte VDI, Reihe 12, Nr. 595

Summary

In the coming decades the internal combustion engine will continue to play a decisive role as the predominant drive technology in automotive engineering. The diesel engine has permanently improved its market position in Europe, thanks to the significantly increased performance potential made possible by efficient direct injection systems in combination with turbocharger technology. The challenges facing new developments lie in the achievement of future emission standards. The main development emphasis for the gasoline engine, with its outstanding comfort and emission characteristics, high output and low costs, in on achieving further reductions in fuel consumption. The use of efficient direct-injection and charging technology can also increase the attractiveness of the gasoline engine in terms of reduced fuel consumption, while at the same time improving output and torque characteristics. In addition to further development of the 4-cylinder downsizing concept successfully marketed by Mercedes-Benz since 2002, which is based on supercharging in combination with first-generation direct-injection technology, second-generation direct- injection using highly efficient injection components makes it possible to significantly improve the combustion process, as well as already achieving considerably enhanced and measurable fuel economy as a stand-alone technology based on improved stratified combustion. The challenge here lies in developing an efficient emissions control system for lean-burn operation. Used in combination with supercharging, this can realize further fuel consumption potentials while achieving a lasting improvement in driving performance. In addition to these in-engine development activities, the potentials of alternative fuels are also briefly discussed.

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