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What is DPF (Diesel Particulate Filter)?

Sep 20, 2023
A diesel particulate filter (DPF) is a device designed to remove diesel particulate matter or soot from the exhaust gas of a diesel engine.
 
 
Cellular ceramic honeycomb filters are the most commonly used type of DPFs, despite the existence of various other types such as silicon carbide DPFs, metal fiber DPFs, and cordierite DPFs. Ceramic materials, such as cordierite, silicon carbide, and aluminum titanate, are preferred due to their excellent thermal resistance and stability.

The ceramic honeycomb DPF is designed with channels that are blocked at each end, which forces the exhaust gas, containing soot particles, to pass through the filter wall. While the gas can pass through the filter, the soot particles become trapped in its pores, which helps to prevent them from being released into the atmosphere.
However, the capacity of a DPF is limited and eventually, the trapped soot needs to be removed to maintain the filter's performance. This process is known as DPF regeneration, during which excess soot in the filter is burned off.

Check out this video, Ryan explained what the DPF is and how it works along with DOC, sensors and SCR.

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