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, Volume 79, Issue 1, pp 38–41 | Cite as

Gasoline Turbocharger with Variable Turbine Technology

  • Nisar Al-HasanEmail author
  • Ralf Böning
  • Daniel Kraus
  • Ivo Sandor

Highly efficient turbochargers with variable guide vanes are currently a challenge in gasoline engines due to the exhaust-gas temperatures. However, this is set to change because of the combination with the Miller-Atkinson cycle. For this usage case, Continental has developed the Vraax turbocharger with variable turbine technology.

Strengths and Limitations of Current Gasoline Turbochargers

Variable-geometry turbochargers (VTG turbochargers) utilise the complete exhaust-gas enthalpy in all operating points. Variable guide vanes have therefore already become standard in diesel engines. Turbochargers play a key role in further reducing the CO2 emissions of gasoline engines. However in the gasoline engines, wastegate turbochargers are typically used because the VTG mechanism represents a major challenge due to the much higher exhaust-gas temperatures.

The Miller-Atkinson cycle is now increasingly used in the gasoline engine in order to reduce the fuel consumption and thereby the CO2...

Copyright information

© Springer Fachmedien Wiesbaden GmbH 2017

Authors and Affiliations

  • Nisar Al-Hasan
    • 1
    Email author
  • Ralf Böning
    • 2
  • Daniel Kraus
    • 3
  • Ivo Sandor
    • 4
  1. 1.WiesbadenGermany
  2. 2.WiesbadenGermany
  3. 3.WiesbadenGermany
  4. 4.WiesbadenGermany

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