An apparatus and method are provided for a cone air filter for a closed intake system of an internal combustion engine. The cone air filter is comprised of a cone-shaped filter medium, retained between a base and a cap, that is fabricated to remove contaminants and particulate matter from an intake airstream. The base is comprised of a flange that couples with an air intake duct of the internal combustion engine. A shell receiver is incorporated into the base and receives a rigid exterior shell, such that the exterior shell surrounds the cone air filter and directs the intake airstream therein. A cap is disposed on an apex portion of the cone air filter and is configured to direct the intake airstream around the apex portion and into the cone-shaped filter medium.

An apparatus and method are provided for a cone air filter for a closed intake system of an internal combustion engine. The cone air filter is comprised of a cone-shaped filter medium, retained between a base and a cap, that is fabricated to remove contaminants and particulate matter from an intake airstream. The base is comprised of a flange that couples with an air intake duct of the internal combustion engine. A shell receiver is incorporated into the base and receives a rigid exterior shell, such that the exterior shell surrounds the cone air filter and directs the intake airstream therein. A cap is disposed on an apex portion of the cone air filter and is configured to direct the intake airstream around the apex portion and into the cone-shaped filter medium.

A reusable air filter and methods are provided for filtering air being conducted to an air intake of an internal combustion engine. The reusable air filter comprises a filter medium configured to pass an airstream and entrap particulates flowing within the airstream. The filter medium is comprised of cotton gauze disposed in a sinusoidal arrangement that provides a filtration surface area that is larger than a perimeter area of the filter medium. An end cap and base may be configured to retain the filter medium therebetween. The base provides an interface between the air filter and an air inlet of the engine. The filter medium may be disposed in a flat, panel shape that is bordered by a supportive tray. Support rods may be embedded within the tray to prevent bowing of the tray due to air pressure when coupled with an air box of the engine.

A filter element is provided that is preferably a side entry air filter having an air filter media pack, a housing seal and a frame that has a clamping projection, a pivot projection and/or guide members. The clamping projection can define a non-linear bearing surface that may be chevron shaped to provide for interface and potential alignment benefits. The housing seal may be a wave seal that undulates.

A reusable air filter and methods are provided for filtering air being conducted to an air intake of an internal combustion engine. The reusable air filter comprises a filter medium configured to pass an airstream and entrap particulates flowing within the airstream. The filter medium is comprised of cotton gauze disposed in a sinusoidal arrangement that provides a filtration surface area that is larger than a perimeter area of the filter medium. An end cap and base may be configured to retain the filter medium therebetween. The base provides an interface between the air filter and an air inlet of the engine. The filter medium may be disposed in a flat, panel shape that is bordered by a supportive tray. Support rods may be embedded within the tray to prevent bowing of the tray due to air pressure when coupled with an air box of the engine.

A hollow filter element for inserting into a filter device for filtering air, in particular of an internal combustion engine of a motor vehicle, includes a filter material which is held on the end face by a planar surround in a sealed manner. The planar surround has at least one grip recess for handling the hollow filter element. A filter device having such a hollow filter element includes a housing having a housing base part and a housing cover. The housing cover has at least one pin which, upon correct installation of the hollow filter element in the housing base part and when the housing cover is placed on the housing base part, projects into the grip recess of the planar surround.

A filter element having a filter media pack with an inlet end, outlet end, and outer periphery extending therebetween. The inlet and outlet ends are separated along an axis. The outer periphery includes a first pair of opposed sides between the inlet and outlet ends, and a second pair of opposed sides extending transversely between the first pair of opposed sides. A frame supports the outer periphery, having opposing first frame side segments, and a second frame segment. Each first frame side segment includes a pair of guide projections extending along respective first sides. The guide projections are spaced apart from one another from a broad end at one second side, to a narrow end at the other second side, and arranged to receive axial forces received within a housing having complementary engagement surfaces. A housing seal is supported along one guide projection, sealing against the complementary engagement surfaces.

A filter element for an air filter assembly of an engine includes a primary filter media and a secondary filter media. The primary filter media has a plurality of pleats having first fold edges on an inlet face of the primary filter media and second fold edges on an outlet face of the primary filter media. The first and second fold edges extend from a first lateral side to a second lateral side of the primary filter media. The secondary filter media is constructed of a non-woven material and includes a first portion arranged on the inlet face of the primary filter media, a second portion secured to the first lateral side of the primary filter media, and a third portion secured to the second lateral side of the primary filter media.

A filter element for an air filter assembly of an engine includes a primary filter media and a secondary filter media. The primary filter media has a plurality of pleats having first fold edges on an inlet face of the primary filter media and second fold edges on an outlet face of the primary filter media. The first and second fold edges extend from a first lateral side to a second lateral side of the primary filter media. The secondary filter media is constructed of a non-woven material and includes a first portion arranged on the inlet face of the primary filter media, a second portion secured to the first lateral side of the primary filter media, and a third portion secured to the second lateral side of the primary filter media.

A filter element includes first filter media, second filter media, a frame, and a seal member. The frame is coupled to the first filter media and the second filter media, the frame securing the first filter media and the second filter media into a V-shape. The seal member is attached to and extends from the frame. The seal member includes a U-shaped channel structured to receive a ridge of a housing when the filter element is installed in the housing. The seal member is structured to form a seal between the filter element and the housing when the filter element is installed in the housing.