Gasoline particulate filters used to remove particulate matter from gasoline engine 

Description:

Gasoline particulate filters (GPF) are used to remove particulate matter from the exhaust gas of gasoline direct injection (GDI) engines. Due to regulations to reduce carbon dioxide emissions, GDI vehicles are becoming more and more popular, and the most cutting-edge is legislation like Euro 6.2. However, GDI engines have higher particulate emissions than port fuel injection gasoline engines. GPF captures particulate matter to control particulate matter emissions, and ultimately makes the cars we drive cleaner for the environment. It includes a honeycomb filter structure made of synthetic ceramic material. When the exhaust gas passes through, the filter traps soot particles. When the exhaust gas temperature is high, the soot is burned and the filter is regenerated. In most cases, the filter operates in a passive manner under a constant capture and regeneration cycle. The DPF will capture soot, and then need a special engine mode to regenerate. The GPF filter is very efficient and can capture more than 90% of the airborne particles that would otherwise be released into the atmosphere.

Comparison of GDF and DPF

1. GDF is only suitable for gasoline engines. The gasoline particulate filter (GPF) is derived from the diesel particulate filter (DPF) in new diesel-powered vehicles. A diesel particulate filter (DPF) is a filter that captures and stores exhaust fumes (some people call it a soot trap) to reduce diesel vehicle emissions.
2. When the exhaust gas temperature is high, the soot is burned and the filter is regenerated. In most cases, GDF operates in a passive manner under constant capture and regeneration cycles. The DPF will capture soot, and then need a special engine mode to regenerate.
3. The GPF can be a separate unit, or it can be packaged together with the TWC. It has a honeycomb structure and is usually made of synthetic ceramic “cordierite”. Although the porosity of GPF is higher than that of DPF because of its lighter base material, which makes it easier for gas to move, it also means that GPF is more fragile than DPF. GDF, like DPF, has three particle trapping mechanisms: interception, impact, and diffusion. The trapping mechanism depends on the particles and pore size, and like DPF, the filtration efficiency increases with the accumulation of sediment.

Specification size of Gasoline particulate filters: