A vortex particle separator has an impeller at a housing inlet with impeller blades spiraling around an impeller shaft and longitudinal axis of the separator to impart either clockwise or counterclockwise rotation to air flowing through the impeller when viewed looking downstream along the axis. The upstream end of each impeller blade is inclined in a direction opposite to the direction the air rotates when passing through the impeller, measured from a radial baseline through the axis and the juncture of the blade with the center shaft of the impeller. Thus, in each orthogonal plane along the axial length of the impeller the juncture of the blade with the housing is offset from the baseline in the rotational direction opposite the direction in which air flows through the impeller. An offset angle of 45° to 55° is believed suitable.

The invention relates to a water separating arrangement in a vehicle air intake intended for mounting between a source of ambient air and an air filter unit. The water separating arrangement (101; 201; 301) comprises a first water separator (110; 210; 310) having a horizontal air intake section (212; 312) and a first water separating section (211; 311), which first water separating section is arranged at least partially surrounding an outer portion of the air intake section (212; 312). The water separating arrangement (101; 201; 301) further comprises a second water separator (120; 220; 320) comprising a housing (221; 321) with an air inlet (223; 323) connected to the air intake section (212; 312); an air outlet (224; 324) connected to an air outlet section (229; 329); wherein the second water separator is arranged to redirect the flow of ambient air over an angle of at least 80°.

A precleaner for engine air filtration includes a housing, separator tubes for inducing cyclonic airflow, and channel arrangements in airflow communication with the separator tubes to channel airflow and particulates toward a dust outlet arrangement.

A spin tube assembly for an engine air cleaner is provided. The spin tube assembly includes a housing, a spin tube panel, a plurality of spin tubes and at least one constrictor. The plurality of spin tubes are supported on the spin tube panel in parallel relation to one another. Each spin tube of the plurality of spin tubes includes a helical element causing air entering the spin tube to rotate such that particles within the air are moved by centrifugal action outwardly against a wall of the spin tube. At least one spin tube of the plurality of spin tubes has a constrictor upstream from the helical element thereof. The constrictor causes a localized restriction of air entering the at least one spin tube compared to the spin tubes without constrictors. Methods of use and configuration are also provided.

A particulate separator includes a housing, and air guide, and an outlet body. The housing has an inlet through which air enters an interior, a first outlet and a second outlet. The air guide is carried by the housing between the inlet and the first outlet, and has deflectors and flow paths between adjacent deflectors, the flow paths communicating with the housing interior. The outlet body has a central portion and a wall extending outwardly from the central portion. The central portion is received at least partially within the interior of the housing with a space defined between an outer surface of the central portion and an inner surface of the housing, and the central portion has an opening through which air flows through the outlet body, and the wall encloses the space so that air that flows around the central portion is blocked by the wall.

A particulate separator includes a housing, and air guide, and an outlet body. The housing has an inlet through which air enters an interior, a first outlet and a second outlet. The air guide is carried by the housing between the inlet and the first outlet, and has deflectors and flow paths between adjacent deflectors, the flow paths communicating with the housing interior. The outlet body has a central portion and a wall extending outwardly from the central portion. The central portion is received at least partially within the interior of the housing with a space defined between an outer surface of the central portion and an inner surface of the housing, and the central portion has an opening through which air flows through the outlet body, and the wall encloses the space so that air that flows around the central portion is blocked by the wall.

An air filter system for a utility vehicle includes a filter housing, a coarse filter located on an inlet side and accommodated in the filter housing, a fine filter arranged downstream in a filter operating direction of an airflow to be cleaned, and a cleaning arrangement accommodated in the filter housing for purging dirt particles separated at least in the fine filter counter to the filter operating direction.

A filter device has a housing plate with a sleeve extending along a longitudinal axis perpendicular to the housing plate. The sleeve guides fluid containing particles along an inner sleeve surface to separate particles from the fluid and discharge the particles via a discharge window of the sleeve. An immersion tube plate opposite the housing plate has an immersion tube projecting coaxially into the sleeve for outflow of the fluid. The immersion tube has a sealing and centering section about an outer circumference of the immersion tube that forms a sealing surface parallel to the longitudinal axis and radially seals with an inner surface of the sleeve. The sealing and centering section extends about the immersion tube to provide coaxial alignment with the sleeve. A radial and/or axial expansion of the sealing and centering section is reduced in a predetermined region of the immersion tube opposite the discharge window.

An air filter system for a utility vehicle includes a filter housing, a coarse filter located on an inlet side and accommodated in the filter housing, a fine filter arranged downstream in a filter operating direction of an airflow to be cleaned, and a cleaning arrangement accommodated in the filter housing for purging dirt particles separated at least in the fine filter counter to the filter operating direction.

The air cleaner (32) comprises a base member (41) including a base wall (41A) extending substantially horizontally, and a cover member (42) attached to an upper side of the base wall to jointly define a filter chamber (70) for receiving a filter element (43) therein. The air cleaner further includes a passage member (44) communicating with the filter chamber and incorporated with a plurality of air ejection pipes (44C) each surrounded by an annular air inlet passage (44E) fitted with guide vanes (44D) for rotating the air flow, and a case member (45) defining separation chambers (45C) for separating dust from the rotating air flow. The passage member (44) is interposed between the cover member (42) and the case member (45).