Definitions of ATS Components

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Refer to the following list of definitions of ATS components.

  • Aftertreatment System (ATS)the entire exhaust system from the turbocharger to the exhaust stack or tail pipe.

  • Aftertreatment Device (ATD)a muffler-like canister that houses a DPF and sensors.

  • Diesel Particulate Filter (DPF)a filter that collects and holds particulate matter (soot and ash).

  • Diesel Oxidation Catalyst (DOC)oxidizes hydrocarbons and reduces NOx.

  • Sensorsdetect temperatures and pressure within the ATS.

  • Diffusera device, used as a deflector, for distributing, mixing, and reducing the velocity of air flow.

Important: The Environmental Protection Agency's 2007 regulations require lower exhaust emissions, thus requiring new exhaust system components. See Fig.. In particular the aftertreatment device (ATD), which is part of the aftertreatment system (ATS), requires special attention during regularly scheduled maintenance inspections. If any discrepancies are discovered, refer to the engine manufacturer's service literature for repair instructions.

  • Inspect this area of the canister for dents.

  • DOC Area

  • DPF Area

  1. Inlet Temperature Sensor

  2. Marmon Fitting at Inlet from Turbocharger

  3. Sensor Housing

  4. DPF V-Band Mounting Clamps

  5. Inlet Temperature Sensor

  6. Exhaust Outlet to Diffuser

  7. Outlet Temperature Sensor

  8. DPF Outlet Pressure Sensor

  9. DPF Intake Pressure Sensor

Fig. 1, Cummins Aftertreatment Device

Note:
Parent topic: Inspecting the EPA07 Exhaust System
Document Number: 0000116931
Manual Publication Date: 2024-05-14
Topic Publication Date: 2024-11-19