Which Volkswagen models do not have a particulate filter?

[VonWalker]

Volkswagen Passat does not have a particulate filter. Function of particulate filter: The particulate filter can reduce soot produced by diesel engines by more than 90%, and the captured particulate emissions are subsequently burned off during vehicle operation. Application technology of particulate filter: The particulate filter utilizes advanced electronic control systems, catalytic coatings, and fuel additive catalysts. Principle of 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 trap through a dedicated pipeline. After passing through its densely arranged bag-type filter, the carbon 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, turning the adsorbed carbon particles into harmless carbon dioxide that is then emitted.