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.

An air cleaner of an internal combustion engine is provided with a first housing including an inlet, a second housing including an outlet, and a filter element located between the first housing and the second housing. A Helmholtz resonator is arranged inside the first housing. An upright wall projects from a bottom wall of the first housing toward the filter element and extends in an axial direction of the inlet. The upright wall forms a chamber of the Helmholtz resonator. A noise-absorption region is defined by the upright wall, a side wall of the first housing, the bottom wall, and the filter element. The noise-absorption region leads to the inlet and extends in the axial direction.

An opening/closing mechanism of an intake member includes: an intake member that accommodates a filter part and has an opening leading to a carburetor in an end wall opposing the filter part; an opening/closing member disposed between the filter part and the end wall, and opens/closes the opening; and a working member disposed on an opposite side to the opening/closing member so as to interpose the end wall, and allows the opening/closing member to be operated. The working member includes: an arm part which extends along the end wall and is linked with the opening/closing member to interpose the end wall at one end part, and a holding part provided to another end part of the arm part. The intake member has a guide hole into which the arm part is inserted and guides movement of the arm part.

Disclosed herein is an air cleaner for a vehicle. In the air cleaner for a vehicle, air introduced into a body through an inlet port passes through a filter assembly while moving in a horizontal direction, impurities contained in the air are filtered when passing through the filter assembly, and impurities-filtered clear air is discharged through an outlet port while moving in the horizontal direction again.

An air filter group for air supply to internal combustion engines of motor vehicles, of a type comprising an external casing provided with an inlet opening of the air to be filtered, and an outlet opening of the filtered air, and a removable cover, the inlet and outlet openings being separated by a removable filter cartridge which comprises a hollow cylindrical filter wall crossed by the air in a centripetal direction, in which the at least a filter cartridge is fixed to the cover in which cover a chamber is present, delimited by a base provided with at least a hole at which the at least a cartridge is fixed, by an opposite wall to the base and by an annular wall located between the base and the opposite wall and comprising the outlet hole of the filtered air, the cover being destined to be inserted sealedly in the casing.

An air filter retention interface for use with an internal combustion engine is disclosed. The interface is substantially secured in an opening of a wall and the interface attaches to an air filter at the front end of the interface and an air intake tube on the back end of the interface. The interface has a filter sleeve and a filter base. During operation of the engine the filter sleeve is disposed through the opening in the wall such that the wall is between beads disposed on the external surface of the filter sleeve and the filter base thereby substantially securing the interface in place and the front end of the filter base is attached to the filter and the back end of the filter base is attached to the air intake tube and air passes through the filter then through the filter base and filter sleeve and then into the air intake tube and toward the engine.

A filter cartridge for a filter for filtering a fluid is to be used downstream of a main filter cartridge in a filter and is provided with an inflow surface, an outflow surface, and a main flow direction extending from the inflow surface to the outflow surface. A filter body is provided that can be flowed through along the main flow direction. A filter cartridge frame supports the filter body. A seal is disposed on the filter cartridge frame and separates a filter interior of a filter into a clean side and a raw side. An adhesive connection is provided that connects the filter body and the filter cartridge frame to each other. In one configuration, the filter cartridge frame at an inflow side is provided with a grip area, wherein the grip area enables inflow of a fluid into the filter body via the grip area and manual removal of the filter cartridge.

A filter cartridge for a filter for filtering of fluid is provided with an inflow surface, an outflow surface, and a main flow direction extending from the inflow surface to the outflow surface. A filter body is provided. A filter cartridge frame supports the filter body. A seal is disposed on the filter cartridge frame in the area of the outflow surface and separates a filter interior of a filter into a clean side and a raw side. Another configuration of the filter cartridge is provided that has an edge protection extending externally circumferentially about the filter cartridge frame in the area of the inflow surface. The edge protection connects the filter body and the filter cartridge frame with each other.

According to the present disclosure, air cleaner assemblies, housings, serviceable filter cartridges and features, components, and methods, relating thereto are disclosed. In general, the features relate to systems that are configured to aid in inhibiting an improper cartridge from being installed in an air cleaner housing, during servicing. A variety of features are characterized, and in many examples, the cartridge includes a seal arrangement having radially directed seal surface with at least a first non-wavy or non-projection/recess section and a second wavy or projection/recess section. Examples are shown and described in detail.

Various embodiments relate to a filter element. The filter element includes a first endplate that defines a first endplate opening and a second endplate. Filter media is positioned between and extending axially between the first endplate and the second endplate. The filter media defines a central opening extending axially therein. A support structure is disposed within the central opening of the filter media and is attached to the first endplate and the second endplate. The support structure includes an axial lobed extension that extends from a first end of the support structure to a second end of the support structure. The support structure is configured to resist collapse of the filter element.