新潟原動機におけるIMO Nox 2次規制と4ストローク機関の対応技術

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  • Technology to Meet IMO Tier II for 4-Stroke Diesel Engines Manufactured by NIIGATA
  • ニイガタ ゲンドウキ ニ オケル IMO NOx2ジ キセイ ト 4 ストローク キカン ノ タイオウ ギジュツ

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To meet stringent nitrogen oxides (NOx) regulations, a miller cycle with high-pressure turbo-charging is applied to all Niigata-manufactured four stroke diesel engines. At the same time, injection rate and compression ratio are optimized. In this paper, a practical study of NOx emission reduction for low-speed diesel engines is introduced. NOx reduction was attained through thermodynamic simulation as well as engine tests. Such technical countermeasures which are described in this paper are applied to all Niigata marine diesel engines and comply with IMO tier II.

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