Through advanced filtration technology and high - quality materials, we ensure that our DPFs meet the most stringent environmental standards helping to improve air quality and protect the environment.
Through advanced filtration technology and high - quality materials, we ensure that our DPFs meet the most stringent environmental standards helping to improve air quality and protect the environment.
The regeneration process of DPF
Passive regeneration
The regeneration process of DPF is essentially to burn the accumulated particulate matter inside the DPF, restoring it to its "original state" and allowing it to continue filtering new particulate matter. This process can be divided into two methods: passive regeneration and active regeneration. Passive regeneration is similar to the phenomenon we observe during cooking: when the heat is sufficient, the oil stains in the pot will naturally fall off. Similarly, in exhaust gas, if the concentration of NO ₂ reaches a certain threshold, particulate matter will self combust inside the DPF without additional operation. This regeneration method is automatically carried out during daily vehicle operation.
◉ Active regeneration
Active regeneration during driving is achieved by increasing the engine fuel injection amount and raising the exhaust temperature to approximately 550 ℃, thereby triggering the combustion of particulate matter inside the DPF. During this process, the driver may notice slight changes in engine speed, but rest assured that this is only one way for the vehicle to self regulate. The idle speed of some car models will increase to about 1000 revolutions per minute in this mode. There will be corresponding prompts on the vehicle dashboard, informing the owner that regeneration operation is underway and there is no need to panic excessively.
◉ Manual regeneration
Manual regeneration: If the vehicle is driven at low speeds for a long time or frequently starts and stops, the exhaust temperature may not meet the requirements for passive and driving regeneration, resulting in the accumulation of DPF particulate matter. Once there is too much particulate matter in the DPF, the vehicle will issue a warning. At this point, the driver needs to choose a safe and suitable location, such as an open parking lot, and press a specific button to activate manual regeneration mode. This process can be regarded as a "deep cleaning" of the DPF. At this stage, the engine speed will be increased and maintained for a period of time until the particulate matter in the DPF is almost completely burned, thus completing the entire regeneration process.
