Diesel Particulate Filter Technology (DPF):
- DPF is among the many techniques developed to cut down on pollution from the air and improve environmental conditions on the Earth with a monopoly share of the automobile market. Many countries worldwide have passed laws over time to make this technology compulsory in all diesel-powered cars worldwide. (The usage of DPF for road vehicles goes as far back as 1985 and, for non-road vehicles some years before that.)
- The efficiency of the DPF system is determined by how well it absorbs particulate matter (soot). Particulate matter produced by incomplete combustion of fuel in the engine can pollute the air. However, the DPF system stops this contamination. DPF absorbs and collects soot particles. ECU when required when the amount of soot that is deposited burns off the soot inside the filter by raising the temperature at which exhaust is emitted.
- However, the defect of the DPF system is apparent when the car is in traffic. Consequently, the engine runs at low RPM.
- In case your DPF gets old and some parts begin to fail you should have some dpf cleaning equipment with you to at least prolong its life before visiting the mechanic.
Causes of DPF Failure:
- DPF pressure sensor failure
- Inadequate tuning for performance
- High mileage automobile
- oil flows through the turbo seals of the engine into the exhaust housing
- Fuel injectors that are defective send excessive amounts of fuel to the mixture of fuel and air.
- EGR valve problems
In these scenarios, many particles of dust could accumulate and clog the exhaust gas path out of the engine. Naturally, it is pre-defined in ECUs. This means that in the case that you are an owner of the car you can empty the DPF filter on intercity roads and highways (when the engine is operating at a higher RPM. The emptying process is based on the car’s model and its ECU. If your DPF is not recyclable (requiring frequent replacement) it must be cleaned at the end of 30,000 kilometers (or about six months) if you’ll have a blocked DPF. However, regeneration should be carried out every 5,000 km, which is often taken care of automatically by the sensors once they test the pressure difference. Regeneration can be conducted in three types:
1.-in the first form, which is also called passive, the principle is the fact that there is soot in the filter builds up and is discharged after traveling a certain distance with high engine load as well as RMP as well as the filter reaching an appropriate temperature. This type of regeneration is mostly for non-traffic-related vehicles.
2.-The second kind of regeneration is known as active regeneration. This type of regeneration is when the DPF is not at the temperature necessary to let out the soot, leading to an increase in pressure within the DPF. The ECU increases the temperature and speeds up regeneration by injecting more fuel.
3-The third kind of regeneration, referred to as manual regeneration, is performed periodically by repair centers. The method is based on the instructions sent to the ECU by the Car scanner device . This device is used to increase its temperature, and also melt off the soot.
V various types of systems for DPF
- Cordierite (Cordierite Wall Flow Filter)
- Ceramic (Ceramic Fiber Filter)
- Silicon Carbide (Silicon Carbide Wall Flow Filter)
These are the three most commonly used DPF models. Aside from the price differences, the three models mainly differ in melting temperature and duct size. These variations ultimately directly impact the final quality of the filter manufactured.
While, aside from the three filter models listed above, other filters such as metal fiber flow-through filters and paper filters are also available but the cordierite filter is the most popular filter model.