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Eco-Friendly System

HSD Engine has applied proprietary technology to develop the DelNOx system for exhaust after-treatment. This highly efficient system operates at low temperature and enables customers to satisfy marine and industrial regulations on nitrogen oxide (NOx) emissions.

DelNOx® SCR System

HSD engine manufactures NOx reduction system(DelNOx) for ships and land based industries such as diesel power plant, and responds to customer needs through providing installation, maintenance & repair services and various technical supports.

DelNOx is the world’s first SCR system installed at the after of turbocharger and applied low temperature catalyst as a new concept.
Based on excellent performance and technology, it is being produced in earnest from 2016 when IMO Tier III regulation came into effect.

Principle of SCR (Selective Catalytic Reduction)

  • SCR (Selective Catalytic Reduction) : Selective Catalytic Reduction (SCR) System
  • The SCR system is an eco-friendly method for NOx reduction. Chemical reactions using a reductant in the catalyst layer convert nitrogen oxides in the exhaust gases into harmless pure water and nitrogen.

  • E-mail address: delnox@hsdengine.com
  • Sales support: +82-55-260-6626 / 6641
  • Technical support: +82-55-260-6929 / 6464

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Global Performance

Global Performance

We have developed environment friendly engine and the largest engine for the first in the world. Doosan Engine will support the shipbuilding industry of Korea.



We make the full range of large diesel engines and have played an important role in making Korea the world"s leading shipbuilder. We also construct diesel power plants.

Brochures / Catalogues

Brochures / Catalogues

Various promotional publications provide the details on shat our business is and how well we perform.