Differences in the application of particulate filters between gasoline engines and diesel engines

In the process of upgrading the National VI emission standards, it is not enough to rely solely on exhaust catalytic reduction. A device called a particle trap is also needed to further reduce particulate matter emissions. So, are all National VI special vehicles equipped with this particle trap? In fact, the particle traps installed on different types of fuel vehicles also vary. Diesel vehicles are usually equipped with DPF particulate filters, while gasoline vehicles often use GPF particulate filters.

Due to the relatively low soot emissions of gasoline engines and their much faster soot oxidation rate compared to diesel engines, the soot loading rate in GPF can be maintained at a lower level. This low ash load characteristic further allows GPF to adopt a more compact and cost-effective design. Unlike diesel vehicles that typically require large volume filters to accommodate 1.5 to 2.5 times the engine displacement, GPF can achieve a volume smaller than the engine displacement, significantly reducing replacement costs.

In summary, the main difference between DPF and GPF lies in the type of engine fuel they are compatible with. But regardless of the type of particle trap, regular maintenance is crucial. The blockage of particle traps not only damages engine performance and increases vehicle fuel consumption, but also shortens its service life, which is a consequence that every car owner does not want to see.