Does the Audi S4 have a particulate filter?
1 Answers
Audi S4 models, except for the top configuration, are equipped with particulate filters. Introduction to the particulate filter: A particulate filter is a ceramic filter installed in the exhaust system of diesel engines, which captures particulate emissions before they enter the atmosphere. Working principle: 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 trap through a dedicated pipeline. After passing through the densely arranged bag filters inside, the carbon particles are adsorbed onto 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, converting the adsorbed carbon particles into harmless carbon dioxide that is then released.