What are Diesel Particulate Filters?

Diesel particulate filters (DPFs) are devices that are installed in an engine's exhaust system in order to filter particulate matter that exists in diesel fuel exhaust gas. DPFs can be used in non-road machines and automobiles. Efficiency of filters vary according to which filter medias are used and other factors such as type of regeneration.

DPFs require "regeneration" which is the process of "burning off" the accumulated particulate matter (or PM) that has collected in the filter.