Cummins Inc.

QSX11.9 AND QSX15 Diesel Engines

The 11.9-liter QSX11.9 and 15-liter QSX15 Heavy-Duty engines are supplied as fully integrated air-intake-to-exhaust aftertreatment systems to meet 2011 EPA Tier IV Interim/EU Stage IIIB regulations.

  • Incorporate the Xtra-High Pressure Injection (XPI) fuel system and a variable geometry turbocharger
  • Cummins Particulate Filter reduces Particulate Matter (PM) emissions by over 90%
  • Cooled Exhaust Gas Recirculation (EGR) system reduces NOx emissions by 45%
  • Up to 5% improved fuel efficiency compared with Tier III, depending on duty cycle

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