MAN designed all D2868/62 marine engines to meet the EPA Tier 3 emission standard without exhaust after-treatment. The EPA Tier 3 emission standard was introduced for displacements of 1.2 to 2.5 l/cylinder from 2014-01-01 onwards. Within the modification of the current marine engines to meet the EPA Tier 3 standard, the gas exchange cycle was optimized. This was mainly achieved by introducing new camshafts based on the Miller cycle. Therewith the fuel consumption was reduced by up to 7% at rated power (referring to equal NOx emissions) and up to 5 % at rated power comparing EPA Tier 2 previous design and EPA Tier 3 new design.


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    Title :

    Gas exchange optimization of marine engines for EPA Tier introduction


    Contributors:


    Publication date :

    2014


    Size :

    13 Seiten, Bilder, Tabellen, 2 Quellen


    Type of media :

    Conference paper


    Type of material :

    Storage medium


    Language :

    English




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