In recent years, with the tightening of environmental policies, the failure rate of diesel particulate filters (DPF) in diesel vehicles has skyrocketed. Data shows that in 2023, the number of vehicle recalls caused by excessive DPF carbon load in China increased by 47% year-on-year, with logistics transportation and construction machinery being particularly prominent.

The Four Main Causes of Carbon Load Exceeding the Standard

1. The cold start frequency is too high

The DPF does not reach its operating temperature (usually above 180 ℃) in a cold state, resulting in a decrease in capture efficiency. According to the actual test data of a logistics company in 2023, vehicles that start cold more than 3 times a day have a DPF blockage speed 2.3 times faster than normal vehicles.

2. Fuel quality does not meet the standard

The excessive content of polycyclic aromatic hydrocarbons in low-quality diesel can accelerate the deposition of carbon particles. In 2023, the State Administration for Market Regulation found that a certain batch of diesel had a sulfur content as high as 0.8% (national standard ≤ 0.05%), resulting in a 60% reduction in DPF blockage cycle.

3. Post processing system matching imbalance

Improper setting of collaborative control parameters between EGR (exhaust gas recirculation) and DPF leads to a vicious cycle of "accretion regeneration". 83% of the 1200 equipment recalled by a certain construction machinery brand in 2023 have this issue.

4. Severe lack of knowledge maintenance

A survey shows that 72% of car owners have never understood the principle of DPF regeneration and mistakenly consider the normal regeneration process (automatically performed when the exhaust temperature is greater than 350 ℃) as a malfunction.

Question section: Has your car also been hit?

-Does the "engine malfunction light+DPF warning light" double flash frequently?

-Did you suddenly lose power while driving at high speeds?

-Is it blocked again within 3 months after cleaning?