Diesel Particulate Filters (DPFs) are designed to capture and store particulate matter (PM) from the exhaust gases of diesel engines. The filter traps soot particles, which are then periodically burned off in a process called regeneration. This burning off can occur actively, through an external heat source, or passively, by utilizing the heat from the exhaust gases. The effective use of DPFs helps in meeting the stringent PM limits set by the Euro 6 standards.