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.
Learning Summary
When the system prompts' particle trap adsorption overload ', it indicates that the DPF (diesel particulate filter) has suffered severe blockage from soot.
1. Through data flow verification, we can use the L235S diagnostic instrument to monitor the differential pressure data flow of DPF. Check if the pressure difference of the DPF is too high while operating at high speed in place. Usually, when the system prompts for carbon soot mass overload, the pressure difference will exceed 25hPa, but the specific value may vary slightly depending on the vehicle model.
2. If it is necessary to dismantle and inspect the DPF, it should be noted that carbon deposition upstream is a normal phenomenon, while downstream should have no carbon deposition under normal circumstances. Once carbon deposits are found downstream, it indicates that the DPF has penetrated and failed internally, and the DPF must be replaced immediately.
3. To clean up carbon deposits, we can use the Bochai DPF high-temperature cleaning furnace designed specifically for DPF for cleaning. In addition, clean and dry compressed air can be used to blow back from downstream of the DPF to remove accumulated soot particles and ash. If conditions permit, weighing can be done before and after blowing to ensure thorough removal of carbon deposits as much as possible.
4. Ensure the correct installation of DPF and carefully check its sealing performance;
5. Monitor the differential pressure data flow of DPF and compare whether the changes in differential pressure before and after cleaning are significant. Usually, when idling in place, the pressure difference should be controlled within 10 hPa, while the pressure difference at the highest speed in place should not exceed 25 hPa.
6. If the pressure difference is still significantly high after cleaning the DPF, it is necessary to further check whether there are cracks or blockages in the connecting air pipe of the pressure difference sensor, and confirm whether the joint is intact. If the trachea is found to be obstructed, it should be cleaned or replaced in a timely manner; If the problem persists, it may be necessary to replace the differential pressure sensor.
7. Reset the carbon load of the DPF to zero to release the regeneration prohibition state triggered by excessive carbon load. Please note that if the carbon load is less than 20g and regeneration prohibition is not triggered, this step can be skipped. After performing this operation, the carbon soot mass will be assigned a value of 1.5g or less, which can be confirmed by reading the data stream.
8. Clear the fault codes in the system.
9. Activate the forced regeneration function. Please note that during the forced regeneration process, the DPF must be in the cleared state and there must be no current fault codes present.
10. Wait for the regeneration process to end, and the DPF regeneration indicator light will turn off to indicate successful regeneration. At this point, it should be checked whether the carbon load is less than 1.5g.
If after the above process, the system still prompts carbon overload and the DPF pressure difference remains large, further dust cleaning treatment is required, and the DPF may be replaced if necessary.
