Catalytic Converter Cordierite Diesel Particulate Filter DPF

The Dpf Diesel Particulate Filter is made of porous cordierite material which can be ventilated. The ceramic body of the filter type is composed of many small parallel channels. Between these parallel holes are separated by the ventilated hole wall, one end is open, one end is blocked, the filter hole wall in the micro hole can allow diesel engine exhaust gas molecules through, black smoke particles due to the size of the relatively large, and can not pass through the micro hole, is filtered on the ceramic hole wall surface, so as to eliminate the effect of black smoke.

 

Diesel Particulate Filter are sprayed with the metals platinum, rhodium and palladium, and the particles emitted by diesel engines are first trapped inside the tiny pores or at the entrance. With the continuation of time, the accumulation layer becomes thicker, the pressure loss increases, in order to ensure the performance of the engine, when the pressure loss reaches a certain value, the filter must be "regenerated". The "regeneration" of the filter is to burn the particles by increasing the gas temperature of the filter. The characteristics of particles in diesel exhaust gas are related to the concentration of oxygen, and can usually be burned at 550 ~ 650 ° C. Generally, the throttle valve is adjusted to increase the exhaust temperature, the gas temperature is increased with the burner, and the combustion temperature of the particles is reduced with the catalyst, so that the accumulated particles are burned off as soon as possible, so that the pressure loss is restored, the function of the filter is restored, and the filter is regenerated.