Established on the market are some types of filters:
Radial filters: The component is installed in the main exhaust stream behind the DPF. The recirculated exhaust gas is filtered through a lateral outlet and fed to the cooler.
Cone filters: Located in the EGR line. The exhaust gas flows through the modified truncated cone filter in a longitudinal direction. The filter can be installed either directly behind the junction or directly in front of the cooler.
Air bag filter pad: also named Automotive airbag cushion, it was made by knitted wire mesh.