Intake air filter for internal combustion engines

摘要

The intake air filter according to the invention is for cleaning intake air for internal combustion engines, in particular in vehicles. To this end, the intake air filter comprises an openable housing (10) with an inlet (14) and an outlet (15). Disposed between the inlet (14) and the outlet (15) is an annular, closed main filter element (17) and an annular, closed secondary element (31). The secondary element (31) is connected to the outlet (15), whereby no contamination can pass through to the outlet (15) when the main filter element (17) is replaced. A centering device (29, 30, 40, 41, 42) is provided on the end face opposite the outlet (15) between the secondary element (31) and the main filter element (17), said centering device being used to fix the position of the secondary element (31) within the main filter element (17). This prevents relative movements between the main filter element (17) and the secondary element (31).

主权项

1. An Intake air filter filtering air flow into an internal combustion engine, comprising:
a housing enclosing a chamber therein, said housing openable to access said chamber, said housing including
an airflow inlet; andan airflow outlet; a main filter element arranged with said chamber, said filter element seal-tightly arranged between the inlet and the outlet such that airflow flowing from said inlet to said outlet is required to flow through said main filter element, wherein said main filter element has an annularly closed shape, a secondary element having an annularly closed shape, said secondary element arranged downstream of said main filter element in flow direction and connected seal-tightly with the outlet such that airflow from said chamber in said outlet is required to flow through said secondary element; a centering device arranged at an end face of said main filter element, said end face on an axial end of said main filter element opposite said airflow outlet, wherein said centering device is operable to fix radial position of said secondary element within said main filter element, wherein said centering device is provided between said secondary element and said main filter element, wherein said centering device comprises an insertion device that is embodied as a pin; wherein a compressible ring is arranged on said pin.