If the diesel particulate filter is to remain effective in the long term, it is important that the filter is regenerated regularly. As soon as the temperature of the exhaust gas reaches 500 - 600 °C, the deposited soot ignites and burns off. The diesel particulate filter is again ready to absorb a new load. This process is repeated continuously. A distinction is made between two different regeneration processes.
Natural regeneration takes place automatically and continuously as the soot deposited on the filter burns off by itself. However, this regeneration process is only possible if the diesel particulate filter has reached the necessary operating temperature of 500 - 600 °C.
In the case of dynamic, or forced, regeneration, engine management plays an active role. The load level at the filter is continuously monitored by the software in the controller. If regeneration is necessary, additional fuel is injected in order to raise the exhaust gas temperature sufficiently high for the soot on the filter to ignite and completely burn off.