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, Volume 78, Issue 4, pp 52–57 | Cite as

Variable Compression Ratio for Future Emission Standards

  • Vincent ColléeEmail author
  • Cyrille Constensou
  • Frédéric Dubois
  • Laurent Guilly

Future environmental standards require improved engine efficiency. Variable compression ratio is a key, as MCE-5 Development shows in the following.

Gain in Efficiency

Countries around the world have introduced strict regulations to limit the emission of pollutants and CO2 from vehicles. The new Real Driving Emissions (RDE) tests will see a further tightening of these very strict standards. In 2025, the great majority of vehicles will be powered solely by gasoline engines. Future environmental standards cannot be met without radically improving the efficiency of these.

Current automobile engines manage 35 % average efficiency in the best of cases, and only over a very limited range of operating conditions. The required incremental improvement cannot be achieved without a technological leap. In the history of engine development, each significant gain in efficiency has resulted from new technology controlling an influential parameter, e.g. regarding air/fuel ratio (fuel injection),...

Copyright information

© Springer Fachmedien Wiesbaden 2017

Authors and Affiliations

  • Vincent Collée
    • 1
    Email author
  • Cyrille Constensou
    • 2
  • Frédéric Dubois
    • 3
  • Laurent Guilly
    • 4
  1. 1.Springer Fachmedien Wiesbaden GmbHWiesbadenGermany
  2. 2.Springer Fachmedien Wiesbaden GmbHWiesbadenGermany
  3. 3.Springer Fachmedien Wiesbaden GmbHWiesbadenGermany
  4. 4.Springer Fachmedien Wiesbaden GmbHWiesbadenGermany

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