The Volkswagen GCI® Combustion System for Gasoline Engines – Potentials and Limits in CO₂ Emissions

Authors

Dipl.-Ing. Jürgen Willand, Dipl.-Ing. Jan Jakobs, Dr. Emanuela Montefrancesco, Dr.-Ing. Marc Daniel, Dipl.-Ing. Volker Vortkamp, MBE, Dr.-Ing. Bernard Läer, Volkswagen Aktiengesellschaft, Wolfsburg;

Year

2009

Print Info

Fortschritt-Berichte VDI, Reihe 12, Nr. 697

Summary

The Golf with a 1.6 l GCI® engine presented at the end of 2006 was the first drivable car in the world with a gasoline compression ignition engine. The implemented Volkswagen GCI® combustion system presented in the car is a part-load combustion system based on homogeneous gasoline autoignition. In a limited region of the characteristic engine map GCI® allows reduction of fuel consumption in combination with minimum raw emissions of nitrous oxide compared to the conventional spark ignited stoichiometric combustion. This paper describes the procedure employed designing the GCI® combustion system. It is characterized by the extensive use of innovative computational methods like the threedimensional simulation of the mixture formation and linking the CFD flow simulation with chemical reaction kinetics to predict the autoignition process.

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