Laser Induced Ignition on Gasoline Direct Injection Engines of the Second Generation

Authors

Univ.-Prof. Dr. B. Geringer, Dipl.-Ing. J. Graf, Dr. D. Klawatsch, Univ.-Prof. Dr. H. P. Lenz, Dr. G. Liedl, Univ.-Prof. Dr. D. Schuöcker, Technical University Vienna; Dr. W. F. Piock, Dr. M. Jetzinger, Dr. P. Kapus, AVL List GmbH, Graz

Year

2003

Print Info

Fortschritt-Berichte VDI, Reihe 12, Nr. 539

Summary

Due to their thermodynamically benefits the Gasoline Direct Injection Engines of the Second Generation show for gasoline engines the highest potential to reduce fuel consumption. On the other hand restrictions are given by the use of a conventional spark ignition system concerning the optimal position of ignition initialization and spark-plug wear. The combination of Laser Induced Ignition and Gasoline Direct Injection Engines of the Second Generation enables a flexible choice of the ignition location, the possibility of ignition inside the fuel spray and a wear resistant initialization of the combustion process. In this paper the fundamentals of Laser Inducded Ignition are pointed out and their potential compared with a conventional ignition system is presented. Furthermore investigations are shown regarding the minimum necessary laser energy, the contamination and wear characteristics of the combustion chamber optics.

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