What is the Difference Between a Particulate Filter and a Three-Way Catalytic Converter?
1 Answers
Particulate filters and three-way catalytic converters differ in the following ways: Brief Description: A three-way catalytic converter transforms harmful gases emitted by vehicles into harmless gases through oxidation and reduction reactions. A particulate filter is a ceramic filter installed in the diesel engine exhaust system, and its regeneration or purification function must be completed under controlled conditions to prevent the filter from becoming clogged with soot. Function: The particulate filter burns off the captured particulate emissions during vehicle operation. The three-way catalytic converter refers to the vehicle's purification device converting harmful gases into harmless gases, thereby cleaning the exhaust, provided there is sufficient oxygen available and the air-fuel ratio is appropriate. 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 exhaust particulate filter through a dedicated pipe. After passing through its densely arranged bag-type filter, the carbon soot particles are adsorbed onto a filter made of metal fiber felt. When the adsorption of particles reaches a certain level, the burner at the end automatically ignites and burns, converting the adsorbed carbon soot particles into harmless carbon dioxide for emission.
