QSX15 for Tier 4

Cummins Inc.'s QSX15 engine meets Tier 4i/Stage IIIB regulations.

Qsx15fortier4 10057578
Cumminslo 10108212

Cummins Inc. announces that the heavy-duty QSX15 engine will be available with a fully integrated air intake to exhaust aftertreatment system to meet U.S. EPA Tier 4 Interim and European Stage IIIB off-highway emissions regulations. The Tier 4 QSX15 incorporates the XPI high pressure common rail fuel system.

  • Low emissions levels achieved with Cummins particulate filter exhaust aftertreatment
  • Crankcase filter to eliminate blowby gas emissions
  • 675 hp (503 kW) compared to 600 hp (447 kW) for the current Tier 3 QSX
  • Peak torque increased by 12% to 2150 lb-ft
  • ECM will integrate with equipment electronics, including CAN bus networks for J1939 and ISO multiplexing
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