In one example, an air intake system is provided. The air intake system includes a first air inlet duct providing intake air to an engine intake conduit, the first air inlet duct including an opening positioned external to an engine compartment. The air intake system also includes a second air inlet duct positioned upstream of the engine intake conduit and external to the engine compartment, the second air inlet duct including a porous material spanning an opening in the second air inlet duct, the porous material having a plurality of defined openings sized to prevent snow from traveling therethrough and collect on the porous material thereby impeding airflow through the second air inlet duct during snowy and icy conditions.

A filter system for filtering fluid has a filter housing with inlet socket and outlet socket for fluid. A central tube with radially open region over a portion of its axial length is arranged in the filter housing in flow communication with the outlet socket in an operating state. Within the central tube, a secondary element is arranged slidably between first and second operating positions. A filter element, separating a raw fluid side from a clean fluid side, has a filter bellows with a first end plate at a first end face and a second end plate at a second end face. The end plates have central openings for receiving the central tube in the filter element interior. In the first operating position, the secondary element opens a fluid path through the radially open region of the central tube and closes the fluid path in the second operating position.

A cleaning module (10) for cleaning a media flow of a first medium contaminated with a second medium that has a housing (12) having an inlet (18) and an outlet (20, 21) and a replaceable filter element (30) arranged within the housing (12). In this arrangement, a flow direction (32) of the media flow is directed through the filter element (30) in the specified installed state against the force of gravity. The filter element (30) has an absorptive and/or adsorptive material (34) for picking up at least a portion of the second medium in the first medium. A filter element for the cleaning module (10) and a filter system (100) having the cleaning module (10) are disclosed.

A fluid housing of a fluid treatment system of a fluid system has a housing part of plastic material that is provided with a receiving chamber for accommodating a fluid treatment component; an installation opening, closable by a closure housing part, for installing the fluid treatment component in the receiving chamber; and a housing connecting section to connect the housing part to the closure housing part. A housing fastening section is provided with which the fluid housing can be fastened to a holding component of the fluid system. An insert is at least partially introduced into the plastic material of the housing part. The insert is provided with a reinforcement region extending with sections thereof in the housing connecting section and is further provided with fastening region extending with sections thereof in the housing fastening section. A fluid treatment system with such a fluid housing is provided.

A filter element (3), which has an oval cross-section in a longitudinal direction (LR) thereof and includes a circumferential sealing device (10) for, in particular, radially sealing the filter element (3) off from a filter holder (2) for the filter element (3), wherein the sealing device (3) has two first curvature sections (35, 36) arranged one facing the other and two second curvature sections (38, 39) arranged one facing the other, wherein the first curvature sections (35, 36) each have a first radius of curvature (R35, R36) and the second curvature sections (38, 39) each have a second radius of curvature (R38, R39), and wherein the first radius of curvature (R35, R36) differs from the second radius of curvature (R38, R39).

An apparatus and a method are provided for an air box with an integrated air filter to communicate air flow from an exterior of the air filter to an air intake of an automobile engine. The air filter comprises a filter material that surrounds at least a portion of an interior cavity of the air filter. An end cap is affixed to a distal end of the filter material, and a wire support extends along at least a portion of the exterior surface of the filter material. The air box comprises a housing portion and a mount portion. The housing portion is configured to direct air drawn through the filter material into the interior cavity of the air filter and then into the air intake of the automobile engine. The mount portion is configured to support the air box and the air filter once installed within an automobile engine bay.

An air filter for automobiles includes, a main filter and a prefilter, wherein the prefilter comprises a nonwoven synthetic fiber having an average density of 0.01 to 0.5 g/cm.sup.3 and a moisture absorbent is adsorbed to the prefilter.

A filter element, which has an oval cross-section in a longitudinal direction thereof and includes a circumferential sealing device for, in particular, radially sealing the filter element off from a filter holder for the filter element, wherein the sealing device has two first curvature sections arranged one facing the other and two second curvature sections arranged one facing the other, wherein the first curvature sections each have a first radius of curvature and the second curvature sections each have a second radius of curvature, and wherein the first radius of curvature differs from the second radius of curvature.

A filter element (3), which has an oval cross-section in a longitudinal direction (LR) thereof and includes a circumferential sealing device (10) for, in particular, radially sealing the filter element (3) off from a filter holder (2) for the filter element (3), wherein the sealing device (3) has two first curvature sections (35, 36) arranged one facing the other and two second curvature sections (38, 39) arranged one facing the other, wherein the first curvature sections (35, 36) each have a first radius of curvature (R35, R36) and the second curvature sections (38, 39) each have a second radius of curvature (R38, R39), and wherein the first radius of curvature (R35, R36) differs from the second radius of curvature (R38, R39).

An apparatus and a method are provided for an air box with an integrated air filter to communicate air flow from an exterior of the air filter to an air intake of an automobile engine. The air filter comprises a filter material that surrounds at least a portion of an interior cavity of the air filter. An end cap is affixed to a distal end of the filter material, and a wire support extends along at least a portion of the exterior surface of the filter material. The air box comprises a housing portion and a mount portion. The housing portion is configured to direct air drawn through the filter material into the interior cavity of the air filter and then into the air intake of the automobile engine. The mount portion is configured to support the air box and the air filter once installed within an automobile engine bay.