A filter device is disclosed having a round filter element having a filter medium body with an open interior. The filter element is installable into a filter housing having a base filter housing and a housing cover, in which an inflow opening of the cover overlaps against and aligns with an inflow opening of a base housing part such they form a continuous inflow opening. A support mesh cage arranged on the radially outer wall of the annular filter medium body. The filter housing has a longitudinally extended cross-sectional shape in which the inflow opening and an outlet opening are both arranged on the base housing part at opposing sides of the base housing part.

A filter element is provided with an annular filter medium body and an end disk arranged at an end face of the annular filter medium body. Guide vanes are arranged adjacent to the end disk, wherein the guide vanes extend radially past an outer contour of the end disk and project into a flow path upstream of an inflow side of the annular filter medium body. The guide vanes are held at the end disk.

A hollow filter element for insertion into an openable filter housing has a filter medium body configured as a hollow body surrounding an inwardly positioned flow space. At least one end disk is connected to the filter medium body and covers an axial end face of the filter medium body. A positioning element is arranged at the at least one end disk and interacts with a housing-associated blade of the filter housing. The positioning element receives the housing-associated blade with form fit in two different transverse directions relative to the longitudinal axis of the filter medium body. The positioning element has a positioning recess.

A filter device is provided with a filter housing provided with a housing wall and with a filter element arranged in the filter housing. The filter element has an annular filter medium body and an end disk arranged at an end face of the filter medium body. The filter medium body surrounds in a ring shape an inwardly positioned flow space for receiving a fluid to be filtered. An annular circumferentially extending flow path is positioned between an outer contour of the end disk and an inner side of the housing wall of the filter housing. Guide vanes project into the annular circumferentially extending flow path. The guide vanes are fastened at the end disk at the filter element. A cover is arranged at the end disk at the filter element and covers a portion of the annular circumferentially extending flow path.

A filter element for filtration and dehumidification of a gas has at least one filter medium body with an outflow side delimiting a clean-side flow chamber. A dehumidification unit is arranged downstream of the at least one filter medium body in a flow direction of the gas in the clean-side flow chamber. A carrier body accommodates the at least one filter medium body and the dehumidification unit. The dehumidification unit is connected flow-tightly to an outflow opening of the clean-side flow chamber. The dehumidification unit is arranged in the clean-side flow chamber at a spacing relative to the at least one filter medium body.

A secondary filter element for a filter arrangement is provided with a filter medium and a circumferentially extending sealing device that seals the secondary filter element in respect to a filter receptacle of the filter arrangement. The circumferentially extending sealing device has an oval geometry with a long side and a short side. The circumferentially extending sealing device has an outer surface projecting, in a radial direction of the secondary filter element, farther past the filter medium when viewed along the short side compared to when viewed along the long side. A filter arrangement has a filter receptacle. A main filter element is received in the filter receptacle, and a secondary filter element is received in the main filter element. The circumferentially extending sealing device of the secondary filter element projects in a radial direction of the secondary filter element outwardly past an interior of the main filter element.

A sealed intake air system incorporates a positive connection seal interface between the air filter and the airbox with captive fasteners to provide a positive connection between the air filter and the one-piece airbox.

The technology disclosed herein relates to, in part, a filter assembly. Filter media is arranged about a central media opening, where the filter media has a first end and a second end. The central media opening extends in an axial direction from the first end towards the second end. An endcap is coupled to the first end of the filter media. The endcap defines an opening in fluid communication with the central media opening, an inner surface abutting and surrounding the endcap opening, and a perimetric sealing surface about the endcap. A first portion of the perimetric sealing surface projects inwardly towards the endcap opening and a second portion of the perimetric sealing surface projects outwardly from the endcap opening. The first portion and the second portion are in axial alignment, and the perimetric sealing surface forms an oblong loop in a first cross-section orthogonal to the axial direction.

A sealed intake air system incorporates a positive connection seal interface between the air filter and the airbox with captive fasteners to provide a positive connection between the air filter and the one-piece airbox.

A filter module is provided with a filter housing provided with an inflow opening. A filter element with an annular filter medium body with an elongate cross-sectional shape is arranged inside the filter housing. A flow path is defined between the inflow opening of the filter housing and an inflow side of the filter medium body. A swirl device is arranged in the flow path and impresses a swirl onto an incoming fluid. The swirl device is a part separate from an outer wall of the filter housing. The swirl device is arranged axially upstream of the inflow side of the filter medium body. The swirl device is provided with a displacement body arranged inside the filter housing adjacent to the inflow opening. The displacement body forms a flow guiding element.