Car owners who have bought a National VI vehicle know that it is different. The exhaust pipe is equipped with a DPF device, and there are also some buttons on the dashboard. If you don't read the user manual, you won't know what they are used for.

The scientific name of DPF is diesel particulate filter, and it also has a twin brother - GPF, called gasoline particulate filter.

But they are essentially a large filter element for filtering particulate matter. It covers the rear end of the tailpipe like a mask, capturing particles generated by the engine, purifying the exhaust, and reducing pollutant emissions.

Research has shown that DPF can achieve a filtration efficiency of up to 98% for particles larger than 0.04 μ m.

In fact, as early as the National V era, some light trucks were equipped with DPF. With the implementation of National VI, emission standards have been further tightened, adding a requirement for the number of carbon particles in exhaust gas. Heavy trucks have also started to be fully equipped with DPF.

Since DPF is a filter, with the continuous collection of particulate matter, there will definitely be times when the compartment is full, and the exhaust pipe is almost blocked, resulting in poor exhaust emissions and a decrease in vehicle power.