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MTZ industrial

, Volume 4, Issue 2, pp 44–53 | Cite as

NOx control with cylinder pressure based engine control systems

  • Martin Greve
Development Engine Control

A reliable method of continuously determining NOx in engine exhaust gases would enable close compliance with emissions limits while maximising fuel efficiency. In the absence of suitable sensors for direct measurement, AVAT Automation uses cylinder pressure patterns as a basis for accurately estimating NOx formation.

NOx dilemma

Of the major constituents of internal combustion engine exhaust emissions, oxides of nitrogen (NOx) pose the greatest challenge, because NOx formation stands in inverse proportion to fuel consumption. This phenomenon finds expression in the “NOx-SFC trade-off” which, in simple terms, reflects the fact that the high combustion temperatures which result from complete, efficient combustion of fuel also result in the temperature peaks which favour NOx formation.

In an age of electronically controlled engines, a valuable tool for reducing NOx formation would be robust and reliable sensors for measuring NOxin engine exhausts. Their signals could be used as an input...

Keywords

Nitric Oxide Cylinder Pressure Otto Cycle Indicate Mean Effective Pressure Engine Control System 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Notes

Thanks

Thanks go to the AiF Arbeitsgemeinschaft industrieller Forschungsvereinigungen for its support of the AVAT project in the framework of the technical development program Pro Inno II and to Dr. M. Birner and Prof. G. Wacht- meister of the LVK, Technische Universität München for their invaluable help.

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Copyright information

© Springer Fachmedien Wiesbaden 2014

Authors and Affiliations

  • Martin Greve
    • 1
  1. 1.Product Management Large Engine ControlsAVAT Automation GmbHTübingenGermany

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