Fuel Consumption Reduction of Tractor-Trailers by Variable Body Geometries

Peter Fischer, Mario Hirz, Jürgen Fabian, Severin Stadler, Martin Prenner

Research output: Contribution to conferencePaper


Reduction of fuel consumption and CO2 emissions represents a main objective of development in transportation industry today. As one component of driving resistances, the aerodynamic drag plays an important role. Especially in case of functional-driven design of commercial vehicles, unfavorable outer vehicle contours lead to high aerodynamic drag coefficients. The present publication introduces a patented approach of a variable body geometry for tractor-trailers to provide both, reduced aerodynamic resistances and maximum transportation space on demand. A prototype trailer has been developed and tested under real-life haulage conditions over a driving performance of more than 20,000 km. In this field trial, the measured averaged reduction of fuel consumption resulted in about 1.5 liters fuel per 100 km.
Original languageEnglish
Number of pages10
Publication statusPublished - 11 Oct 2016
Event25th Aachen Colloquium Automobile and Engine Technology 2016 - Eurogress Aachen, Aachen, Germany
Duration: 10 Oct 201612 Oct 2016


Conference25th Aachen Colloquium Automobile and Engine Technology 2016


  • air drag
  • truck
  • variable roof geometry

Fields of Expertise

  • Mobility & Production

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