Diesel Particulate Filters (DPFs) remove particulate matter, also known as soot, from diesel engine exhaust gas through a process called filtration. The DPF is a device containing a ceramic monolith with many small channels. These channels are alternately plugged at each end, forcing the exhaust gas to flow through the porous walls of the filter. As the exhaust gas passes through the filter walls, the particulate matter is physically trapped within the pores of the ceramic material. This is similar to how an air filter removes dust from the air. Over time, the accumulated particulate matter increases the backpressure in the ....
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