If you plan to use your car on a closed racing track or live in a country where DPF deactivation is allowed, we can help with this process and provide expert service.
What is a Diesel Particulate Filter (DPF)?
DPF is a device designed to reduce the emission of particulate matter (soot) in diesel vehicles. The primary function of the DPF is to capture and retain the soot generated during fuel combustion, preventing it from being released into the atmosphere.
How does the DPF work?
The DPF is a porous structure through which exhaust gases pass. When the vehicle operates, soot settles in the filter’s pores, while the cleaned exhaust gases exit the system. To prevent the filter from clogging, a regeneration process is used.
DPF Regeneration
Over time, soot accumulates in the filter, which can lead to clogging. To maintain the efficiency of the filter and prevent damage, regeneration occurs, which is the process of cleaning the filter from accumulated soot. There are three main types of regeneration:
- Passive regeneration — occurs naturally during long trips when exhaust gas temperatures are high enough. The soot burns and exits through the exhaust system.
- Active regeneration — initiated by the engine control system when the filter becomes heavily clogged, raising the exhaust gas temperature to burn off the soot.
- Forced regeneration — performed manually at a service center using diagnostic equipment if previous methods fail.
Why are DPFs important?
DPFs play an essential role in protecting the environment and human health. The particulate matter emitted by diesel vehicles can cause respiratory diseases and contribute to air pollution. The introduction of DPFs has significantly reduced these emissions, allowing vehicles to comply with strict environmental standards.
DPF Issues and Maintenance
Despite their advantages, DPFs can present certain issues. Over time, they may become clogged, especially with frequent short trips in urban areas where regeneration doesn’t complete. In such cases, the DPF warning light may illuminate, indicating the need for cleaning or replacement.
Some car owners choose to remove the DPF due to the cost of maintenance or replacement, but this is illegal in most countries and can result in increased emissions and fines.
EGT and Differential Pressure Sensors
Modern diesel vehicles are equipped with several important sensors in the DPF system, including Exhaust Gas Temperature (EGT) and Differential Pressure sensors. These sensors play a crucial role in maintaining the DPF’s functionality and preventing clogging.
EGT Sensor
The EGT sensor measures the temperature of the exhaust gases passing through the DPF. This data is necessary for controlling the DPF regeneration process. If the exhaust gas temperature is high enough, passive regeneration occurs, burning off the accumulated soot.
Differential Pressure Sensor
The Differential Pressure sensor measures the pressure difference between the inlet and outlet of the DPF. As soot accumulates, this difference increases, signaling that the filter is becoming clogged. The sensor sends this data to the engine control unit (ECU), which can activate the regeneration process based on these readings.
DPF Deactivation: Conclusion
The diesel particulate filter is a critical component of modern diesel vehicles, reducing harmful emissions. Proper maintenance and timely regeneration extend its lifespan and reduce the environmental impact. However, in exceptional cases, DPF deactivation is possible.