Optimized Development Methodology to Improve Fuel Mixture Preparation for the Audi R8 FSI® Le Mans Engine

Authors

Dipl.-Ing. U. Baretzky, Dipl.-Ing. T. Pfeffer, Dr.-Ing. P. Kuntz, Audi AG, Neckarsulm; Dr.-Ing. W. Ullrich, Audi AG, Ingolstadt

Year

2004

Print Info

Fortschritt-Berichte VDI, Reihe 12, Nr. 566

Summary

Following the successful development of the gasoline direct injection technology FSI® for motor racing in the 24 hours of Le Mans in the years 2001 and 2002, a further development in brake power and efficiency could only be achieved through a thorough understanding of the fuel mixture preparation and the combustion process itself. Therefore, all relevant parameter, such as geometries, control values, e.g., were isolated to examine their influence in fuel mixture preparation and combustion in a simultaneous development process of engine testing and calculation. Cylinder pressure indication as an important tool was utilized to validate the results of simulation computations. After validation, the computation of variants provided parameter settings for engine testing. This tight corporation of simulation and testing was utilized to develop the 4.0 l V8 FSI® engine which powered the Bentley EXP 08 to its historic victory in the 24 hours of Le Mans 2003.

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