An apparatus for partially blocking airflow in a precleaner for an internal combustion engine may include a stationary barrier configured to be mounted in a precleaner. The apparatus may further include a movable barrier coupled to the stationary barrier and configured to move between an open position and a closed position in response to changes in an air flow rate through the precleaner. When the air flow rate through the precleaner reaches a threshold air flow rate, the movable barrier may move from the closed position toward the open position, and when the air flow rate through the precleaner drops below the threshold air flow rate, the movable barrier may move from the open position toward the closed position.

An automotive snorkel is for a vehicle having an engine bay in which an engine incorporating an air intake system is located. The automotive snorkel includes a hollow housing having an upper opening and at least one lower outlet, a mounting box adapted to be received in the upper opening, and a plurality of removable filters. The mounting box includes a plurality of filter mounts and a filtration outlet to an external environment. Each filter is removable and adapted to be securely retained by a filter mount. Air only enters the snorkel by way of the upper opening where it is directed towards the filters that filter the particles entrained therein using centrifugal force. The separated particles thereafter are directed to the external environment by way of the filtration outlet. The filtered air is directed through the hollow housing to the lower outlets for subsequent delivery to the engine.

The invention relates to a filter element (10), comprising a filter body (12) in concentric form having a longitudinal axis (L), a first end disk (16) situated on one end face (15), and a second end disk (18) situated on the opposite end face (17), and a support tube (14) situated concentrically around the longitudinal axis (L) between the first and the second end disks (16, 18). At least one of the end disks (18) has a centering element (22) that is situated around the longitudinal axis (L), as a result of which the filter element (10) can be radially centered during installation in the housing (108). A support structure (20) is provided on the at least one end disk (18) which is concentric with respect the centering element (22) and is provided for at least axially supporting the filter element (10) in the housing (108). The invention further relates to a filter system (100) for exchangeably installing such a filter element (10).

A filter cartridge for a filter for filtration of a fluid has a prismatic basic shape with a base face and a top face arranged parallel to each other and each having a polygonal basic shape. The prismatic basic shape is provided with a first lateral face and a second lateral face neighboring the first lateral face, wherein the first lateral face is an inflow surface and is substantially positioned perpendicular to the neighboring second lateral face. The prismatic basic shape has a third lateral face that is an outflow surface and is positioned at an angle relative to the first lateral face, wherein the angle is greater than 10 and smaller than 80. A filter with such a filter cartridge is disclosed.

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. A spacer structure is provided that determines a spacing between the filter cartridge frame and a further downstream filter cartridge in the main flow direction. 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.

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.

An airbox includes an intake air inlet in a housing, wherein the intake air inlet includes a first portion and a second portion, at least one air outlet in the housing, and an air chamber within the housing and fluidly connected to the intake air inlet and the at least one air outlet. The air chamber includes an internal wall that divides the air chamber along an axis thereof into a first air chamber portion fluidly connected to the first portion of the air inlet and a second air chamber portion fluidly connected to the second portion of the air inlet, and a moveable air inlet damper configured to seal the first portion of the air inlet and occlude the first air chamber portion, or to seal the second portion of the air inlet and occlude the second air chamber portion.

A pre-cleaner may include a plurality of spin tubes arranged side-by-side to form a row. Each spin tube may include a longitudinal axis, an inlet at a first end, and an outlet at a second end. The pre-cleaner may also include a manifold enveloping the outlets of the plurality of spin tubes and configured to receive and direct dust away from the outlets. The manifold may include a cover portion extending along and adjacent the row of spin tubes at a position along the longitudinal axis that is between the respective outlets and first ends of the spin tubes. The manifold may also include a trough extending along the row of spin tubes and defining a collection area that is arranged at a position along the longitudinal axis that is beyond the second ends of the spin tubes. A method of dust removal is also described.