B M Catalysts BM11193H - Soot/Particulate Filter Exhaust System

The diesel particulate filter (DPF) is a device used in diesel engines to trap soot particles. Soot is a byproduct of incomplete combustion, and it is a major contributor to air pollution. The DPF traps the soot particles and then burns them off at high temperatures. This helps to reduce emissions and improve air quality.

The DPF is typically located in the exhaust system of the vehicle. It is a cylindrical device made of ceramic or metal. The DPF has a honeycomb structure that traps the soot particles. The soot particles are then burned off during a process called regeneration.

There are two types of regeneration: passive and active. Passive regeneration occurs naturally when the engine is running at high temperatures. Active regeneration is initiated by the vehicle's computer when the soot level in the DPF reaches a certain point. Active regeneration can be done in two ways:

• Sooting regeneration: The engine is run at a high speed and load, which raises the exhaust temperature. This causes the soot particles to burn off.
• Exhaust fluid injection: A chemical called diesel exhaust fluid (DEF) is injected into the exhaust stream. DEF helps to lower the temperature at which the soot particles burn off.

If the DPF does not regenerate properly, it can become clogged with soot. This can cause a number of problems, including:

• Engine power loss
• Increased fuel consumption
• Engine misfire
• Check engine light

If you think your DPF may be clogged, it is important to have it checked by a qualified mechanic. They can perform a diagnostic test to determine if the DPF is the problem. If it is, they can clean or replace the DPF as needed.