The New 4.0l-V8-TFSI-Engines from Audi – The Logical Combination of Efficiency and Performance

Authors

Dipl.-Ing. J. Königstedt, Dipl.-Ing.(FH) M. Aßmann, Dipl.-Ing. C. Brinkmann, Dipl.-Ing. A. Eiser,
Dr.-Ing. A. Grob, Dipl.-Ing. J. Jablonski,
Dipl.-Ing. R. Müller, AUDI AG, Neckarsulm/Ingolstadt

Year

2012

Print Info

Fortschritt-Berichte VDI, Reihe 12, Nr. 735

Summary

The 4.0-l V8 TFSI engines from Audi are a new development that introduces the downsizing strategy to the high-performance market segment. They are twin-turbo engines that develop up to 382 kW (520 bhp). Thanks to forced aspiration, the V8 TFSI develops a supreme flow of power, with up to 650 Nm of torque available at engine speeds between 1700 and 5500 rpm. The cylinder head concept with the intake system on the outside and the exhaust system on the inside is designed to keep the gas flow paths short, with minimal flow losses. The engine, with its two twin-scroll turbochargers, has a highly spontaneous throttle response. As a highlight on these engines, the ‘cylinder on demand’ system, based on the Audi valvelift system (AVS) is employed. In addition, friction losses have been significantly reduced by various measures, and innovative thermal management (ITM) adopted.

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