The filter removes a lot of the DPM-so much so, you could place a white handkerchief over the exhaust pipe and it would stay white.īut over time, soot builds up in the DPF filter walls. It’s a wall-flow filter usually made of cordierite, silicon carbide, or a ceramic monolith.Īs the exhaust gasses pass through the filter, it captures somewhere between 85%-100% of diesel particulate matter (DPM).
These filters grab soot from your exhaust before it blows out into the environment. Diesel particulate filter regen is a relatively recent issue facing truck and fleet owners.īy “recent,” we mean 2007 diesel trucks from that model year and onward are “blessed” with a diesel particulate filter (DPF).