GHG14 Aftertreatment System

GHG14 Aftertreatment System - Ops

The GHG14 Aftertreatment Device (ATD) has changed to an airless dosing system. The airless dosing unit no longer relies on air pressure to atomize Diesel Exhaust Fluid (DEF) in the Selective Catalyst Reduction (SCR). The SCR system consists of an Aftertreatment Control Module (ACM2.1), a tank for DEF, a DEF pump, an airless DEF dosing unit, and an SCR module. DEF is pumped to the airless dosing unit through a high pressure DEF line at 10 bar (145 psi). The DEF dosing unit injects a fine mist of atomized DEF into the SCR module to produce a chemical reaction. This chemical reaction converts nitrous oxides (NOx) present in the exhaust stream into water vapor and nitrogen.

  1. Diesel Oxidation Catalyst Outlet Temperature Sensor
  2. Diesel Oxidation Catalyst Inlet Pressure Sensor Tube
  3. Diesel Oxidation Catalyst Inlet Temperature Sensor
  4. Front Heat Shield
  5. Diesel Exhaust Fluid Dosing Unit
  6. Exhaust Outlet
  7. Exhaust Inlet
  8. Selective Catalytic Reduction (SCR Catalyst) Outlet Temperature Sensor
  9. Selective Catalytic Reduction (SCR Catalyst) Outlet NOx Sensor
  10. Selective Catalytic Reduction (SCR Catalyst) Inlet Temperature Sensor
  11. Selective Catalytic Reduction (SCR Catalyst) Inlet and Outlet NOx Sensors (microprocessor mounted)
  12. Diesel Particulate Filter Outlet Pressure Sensor Tube
  13. Selective Catalytic Reduction (SCR Catalyst) Inlet Temperature Sensor
  14. Selective Catalytic Reduction (SCR Catalyst) Inlet NOx Sensors
  15. 47-Pin Connector Harness
  16. Diesel Particulate Filter Outlet Pressure Sensor
  17. Diesel Oxidation Catalyst Inlet Pressure Sensor
  18. Sensor Bridge

Fig. 1, GHG14 1-BOX™ Configuration

Note:
Parent topic: Aftertreatment System
Document Number: 0000022357
Manual Publication Date: 2024-03-05
Topic Publication Date: 2023-12-10