Doosan Low Emission Natural Gas Engine

Engine technology to hit near-zero NOx:

• CNG Stoichiometric combustion
• EGR ( Exhaust gas recirculation)
• High ignition energy
• Turbocharger matching
• Three-way catalyst matching

http://www1.eere.energy.gov/cleancities/pdfs/ngvtf11_doosan.pdf
http://www1.eere.energy.gov/cleancities/pdfs/ngvtf12_callahan.pdf