Effectively address the issues of reduced catalytic activity and blockage caused by carbon deposition and ash content. This product is injected in the way of foam spray immersion. Using the high temperature environment of the DPF particle trap after the engine is running, it can make the blocked carbon and ash such as sulfur, phosphorus, calcium, manganese form water soluble salts, fall off from its carrier and discharge; Thus, the surface coating of the covered DPF is unobstructed, optimizing the DPF filtration function.