What is the difference between a particulate filter and a three-way catalytic converter?
1 Answers
The differences between a particulate filter and a three-way catalytic converter are as follows: Brief description: The three-way catalytic converter converts harmful gases emitted by the vehicle into harmless gases through oxidation and reduction reactions; the particulate filter is a ceramic filter installed in the emission system of a diesel engine, and the regeneration or purification function of the filter must be completed on a controlled basis to prevent the filter from being clogged by soot. Function: The particulate filter burns the captured particulate emissions during vehicle operation; the three-way catalytic converter refers to the vehicle's purification device that converts harmful gases into harmless gases, thereby purifying the vehicle's exhaust, provided that there is still oxygen available and the air-fuel ratio is reasonable. Principle of the particulate filter: The diesel particulate filter is coated with metals such as platinum, rhodium, and palladium. The black smoke containing carbon particles emitted by the diesel engine enters the engine exhaust particulate filter through a dedicated pipeline. After passing through the densely arranged bag-type filter inside, the carbon smoke particles are adsorbed on the filter made of metal fiber felt. When the adsorption of particles reaches a certain level, the burner at the end automatically ignites and burns, burning off the carbon smoke particles adsorbed on it and converting them into harmless carbon dioxide that is then emitted.
