The New Six-Cylinder Bi-Turbo Engine with Variable Turbine Geometry for the Porsche 911 Turboft

Authors

Dipl.-Ing. M. Kerkau, Dipl.-Ing. S. Knirsch, Dr. H.-J. Neußer, Dr.Ing.h.c.F.Porsche AG, Weissach

Year

2006

Print Info

Fortschritt-Berichte VDI, Reihe 12, Nr. 622

Summary

Turbocharging has a long lasting tradition at Porsche. Already in 1974, this technique was first implemented in a series sports car with the 911 Turbo. Now Porsche is about to cele-brate a new world premiere: the first-time implementation of the Variable Turbine Geome-try concept in the new Porsche 911 Turbo - a system specifically developed for application in high-performance SI engines. To adapt the Variable Turbine Geometry to the SI engine concept, innovative materials were needed which had to be carried over from aerospace engineering. In addition, com-pletely new functions had to be developed for the boost pressure control system to make it cope with the higher demands on agility and response. The new 3.6-litre engine, Figure 1, convinces by outstanding torque and performance data: A torque level of 620 Nm, available between engine speeds of as low as 1,950 rpm and up to 5,000 rpm, as well as a power output of 353 kW at 6,000 rpm. A further novel feature is the overboost function, which allows torque to be increased by additional 60 Nm to a maximum value of 680 Nm at engine speeds of 2,100 to 4,000 rpm in sports mode....

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