Everything About Diesel Particulate Filter

All of today's modern vehicles have a part called Diesel Particulate Filter in the engine system. Most people have only one question in their minds. What is Diesel Particulate Filter? In our article, we will explain the answer to this question in full detail. Diesel Particulate Filter is a mechanical filtration system found in some of the Euro 4 emission type vehicle models and in all Euro 5 and Euro 6 emission type vehicles. This system is used to minimize the emission rates of Hydrocarbons and Carbon Monoxide and to filter the particles in the engine exhaust gases. While the main body of this part is made of silicon carbide, the outer surface has a structure covered with noble metal.


How Does a (DPF) Diesel Particulate Filter Work?

While the filter is likened to a honeycomb shape in terms of design, it filters and stores the particles in the exhaust gases that may harm the environment. The amount of these particles stored over time may increase and cause the system to clog. Filter systems produced by some brands are disposable and can be thrown away when clogged, while some of them are capable of self-cleaning thanks to the sensors and after-burner injectors inside. In these systems, if the sensitive sensors inside the filter detect that the amount of soot residue accumulated inside has reached critical levels, it informs the driver that the regeneration process is about to start with a warning screen. The driver who receives this warning should continue to drive the vehicle at high revs for about 25 to 30 minutes and should never idle or stop the vehicle.

Diesel Particulate Filter can be clogged for the following four reasons;

  • Leaving the vehicle idling for a long time.
  • Using low quality fuel in your vehicle.
  • Using oil that is not suitable for your vehicle.
  • Driving the vehicle at very low speeds and heavy traffic.


What is the Regeneration Process?

So how does the regeneration process we mentioned above take place? When the driver who sees the warning starts to use the vehicle at high revs, the engine system of the vehicle increases the amount of fuel sent to the relevant parts and the exhaust temperature rises. When this temperature reaches a sufficient level, the regeneration process is triggered, and the harmful particles stored in the filter burn and turn into soot. Regeneration may not be beneficial in certain situations. As a result, your vehicle continues to warn you and starts to lose its power. In this case, the vehicle should be immediately taken to the authorized service and checked by the authorities using a fault detection device. Even with regeneration, a filter can become uncleanable and can be completely replaced.