Diesel Particulate Filter is a kind of special structure and special material of wall flow ceramic honeycomb ceramic filter element, used in the diesel engine exhaust gas purification device, using the hole wall of the pore wall flow filter body, intercept, capture the carbon in the diesel exhaust smoke particles, diesel exhaust gas purification. There are cordierite and silicon carbide material.  Diesel Particulate Filter, which consists of parallel channels, separated by thin walls made of porous cordierite. The channels are open at one end, but plugged at the other. During operation, the exhaust gases are forced to flow through the thin walls and leave particulates trapped in the filter walls.