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, Volume 63, Issue 5, pp 10–13 | Cite as

Reducing NOx emissions using the humid air motor concept

  • Emmanuel Riom
  • Lars-Ola Larsson
  • Ulf Hagström
Development Emissions


The use of water to prevent NOx formation during the combustion process is well known. The H.A.M. system (Humid Air Motor) is an original and promising solution compared to current methods. This system involves evaporating large quantities of water at the compressor outlet of the turbocharger in order to bring the charge air close to saturation. This article by Munters Euroform describes the principle that has been implemented in a diesel engine by S.E.M.T. Pielstick.


Diesel Engine Butterfly Valve Bottom Dead Centre Piston Crown Compressor Outlet 
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.

Verminderung des NOx-Ausstoßes von Dieselmotoren mit dem „Humid Air Motor“-Prinzip


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  1. [1]
    International Maritime Organization MP/CONF.3/35 Annex Technical Code on Control of Emissions of Nitrogen Oxides from Marine Diesel Engines, October 1997Google Scholar
  2. [2]
    Swedish Maritime Administration „Information on application procedures, technical descriptions and conditions for qualifying for environmental differentiated fairway dues“Google Scholar
  3. [3]
    Bastenhof, D.: SEMT Pielstick „Moteur Diesel de demain: vers un nouvel equilibre“. Conference ATEE-Parts, June 1997Google Scholar
  4. [4]
    Rosén P.; Olsson L.O.: „A Novel Technique of Reducing NOx emissions with an Efficiency increase of Turbo-Charged Diesel Engines by Means of Humidification of the Compressed Air“. Proceedings of ECOS 1996, Stockholm, Sweden, June 1996Google Scholar

Copyright information

© Springer Fachmedien Wiesbaden 2002

Authors and Affiliations

  • Emmanuel Riom
  • Lars-Ola Larsson
  • Ulf Hagström

There are no affiliations available

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