What is a Diesel Particulate Filter?

[OPiper]

Diesel particulate filters are categorized into active regeneration and passive regeneration based on their working principles. Below is an introduction to diesel particulate filters: Function: Diesel particulate filters can effectively reduce particulate emissions by first capturing particulate matter from the exhaust and then oxidizing the captured particles to regenerate the filter. The so-called regeneration of the filter refers to the fact that during long-term operation of the DPF, the accumulation of particulate matter in the filter will gradually increase, leading to higher backpressure in the engine and a decline in engine performance. Working process: The diesel particulate filter (DPF) captures particles through a filtration device that combines surface and internal mechanisms, such as diffusion deposition, inertial deposition, or linear interception.

[LaArcher]

Hey, I've been in the automotive industry for years and I'm quite familiar with diesel particulate filters. These devices are installed in the exhaust systems of diesel vehicles, specifically designed to capture those tiny soot particles and prevent them from being released into the air. The working principle is pretty straightforward: when exhaust gases pass through, the fine particulate matter gets trapped by the filter screen, just like a sieve, allowing only clean gas to exit. However, it can get clogged, so a regeneration process is needed—where the engine burns off accumulated ash at high temperatures. There are two common methods: passive regeneration and active regeneration. Passive regeneration relies on the exhaust gas temperature during normal driving to automatically burn off the deposits, while active regeneration requires the vehicle to trigger a programmed heating process. The design uses ceramic materials, which are heat-resistant and durable. Ignoring a clogged filter for too long can lead to serious issues, such as reduced acceleration or warning lights on the dashboard, so it's essential to perform professional cleaning or regeneration promptly.