Definitions of ATS Terms

s2 m 49.01.004

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, DOC, 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.

  • Sensors—detect temperatures and pressures in the ATS.

Note: 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.

  1. Marmon Fitting at Inlet from Turbocharger

  2. Temperature Sensor

  3. ATD Mounting Band

  4. DPF Intake Pressure Sensor

  5. DPF V-Band Mounting Clamps

  6. Sensor Junction Box

  7. Temperature Sensor

  8. Exhaust Outlet Marmon Fitting

  9. DPF Outlet Pressure Sensor

Fig. 1, Typical Aftertreatment Device

Note:
Parent topic: EPA07 Exhaust System
Document Number: 0000121072
Manual Publication Date: 2024-05-24
Topic Publication Date: 2026-10-14