What a DPF is/does

A Diesel Particulate Filter (DPF) is an emissions control device designed to capture and remove particulate matter (PM), including soot and ash, from a diesel engine’s exhaust.

How It Works:

1. 1. Traps Particulate Matter: The DPF consists of a porous ceramic material that captures and holds soot particles from the exhaust stream.
   2. Regeneration (Burning Off Soot): Over time, the trapped soot must be burned off through a process called regeneration, which occurs in three ways:
      • • Passive Regeneration: Uses normal exhaust heat to burn off soot during long drives at high speeds.
        • Active Regeneration: The engine injects extra fuel to raise the exhaust temperature and burn off soot.
        • Manual Regeneration: If the filter clogs, a forced regeneration is performed via diagnostic tools.
        • Reduces Emissions: After regeneration, only a small amount of ash remains, significantly reducing diesel engine emissions.

1. Soot

2. Ash

3. Fluids

4. Damage

• Cracks
• Glazing
• Melts
• Chips

How do we test a DPF?

1. Airflow Pressure Test
2. Pin Guage
3. Borescope
4. Bypass Detection