The issue of diesel vehicle DPF particulate filters has attracted much attention since last year. The internet is flooded with news reports about the implementation of diesel vehicle DPF installation policies in a certain area, and car owners are lamenting the increasingly strict restrictions. At the same time, the durability of DPF has become a hot topic of discussion.

Previously, we only knew that National III vehicles were required to be equipped with DPF. However, this year, Shenzhen has further stipulated that all newly sold National V diesel vehicles must be equipped with DPF. Therefore, many newly launched National V models on the market, especially those equipped with DPF, are clearly designed specifically to respond to Shenzhen's policy.

Of course, the installation requirements for DPF are not limited to the Shenzhen area. With the gradual implementation of the National VI emission standards, DPF has become an indispensable post-treatment equipment. Although the cleaning information of SCR post-treatment mufflers has received a lot of attention on social media recently, whether DPF needs to be cleaned after installation is also worth the attention of car owners.

DPF， The diesel particulate trap is a key component in the after treatment system of diesel vehicles, mainly responsible for capturing and adsorbing carbide particles in the exhaust. This device can effectively purify up to 70% to 90% of particulate matter in diesel vehicle exhaust. Therefore, some people praise it as a miracle tool for reducing particulate matter, believing that simply installing it can easily solve all problems. However, is this really the case? The answer is not like that.

Due to the fact that diesel particulate matter mainly comes from incomplete combustion, in order to address this issue, the National Emission Standard IV adopts the strategy of oxygen enriched complete combustion. This strategy has indeed significantly reduced particulate matter emissions, but at the same time, it has also led to an increase in nitrogen oxide emissions. Therefore, in the five stages of the four countries, SCR selective catalytic reduction technology is usually combined to further treat exhaust gas. However, diesel vehicles may still produce particulate matter under certain specific operating conditions. At this point, DPF can showcase its powerful adsorption ability to ensure cleaner exhaust emissions.