Abstract: A membrane humidifier has a housing and a membrane stack. The membrane stack includes two first stack sides aligned parallel to the assembly direction. The membrane humidifier has a sealing device with two first sealing frames, each with an inner sealing surface and an outer sealing surface. The housing has two first housing sealing surfaces. The first sealing frames are in sealing contact with the inner sealing surfaces on the first stack sides. The first sealing frames are in contact with the outer sealing surfaces on the first housing sealing surfaces. The outer sealing surfaces of the first sealing frames and the first housing sealing surfaces of the housing are each aligned at a mounting angle to the first stack sides and to the mounting direction that is not zero. In addition, an arrangement is provided which includes the membrane humidifier and the sealing device for the membrane humidifier.

Abstract: A humidifier for humidifying dry cathode incoming air via humid cathode outgoing air for a fuel cell system may include a housing, two end plates, supporting elements, and a membrane stack including membranes arranged one after another in a stacking direction. The membrane stack may have two opposing first longitudinal faces, two opposing second longitudinal faces, and two opposing end faces. Fluid may be flowable through the first and second longitudinal faces and may not be flowable through the two end faces. The first and second longitudinal faces may be aligned parallel to the stacking direction. The two end faces may be aligned transversely to the stacking direction. The supporting elements may be configured to absorb forces acting along the stacking direction, arranged in pairs opposite each other on the first and/or second longitudinal faces, and/or attached to the two end plates.

Abstract: A membrane stacking unit for a humidifier for a vehicle powered by fuel cells is disclosed. The membrane stacking unit includes a cuboid membrane stack with a plurality of flexible membranes stacked in a stacking direction, with four side faces through which air can flow and two end faces through which air cannot flow. Two sealing frames are assigned to two opposing side faces of the membrane stack. The respective sealing frame has a circumferential sealing region and a circumferential region projecting vertically. The respective sealing frame has a recess that is filled with an adhesive for sealing to the membrane stack.

Abstract: A humidifier, such as for a fuel cell system for a vehicle with a fuel cell for humidifying a dry air flowing to the fuel cell with a humid air flowing from the fuel cell, may include a membrane stack including a stack of flat membranes, a housing in which the membrane stack is accommodated, and two circumferential seals clamped between the membrane stack and the housing. The membrane stack may have two opposite lateral faces aligned parallel to a stacking direction for an inflow and an outflow of dry air, two further opposing lateral faces aligned parallel to the stacking direction for an inflow and an outflow of humid air, and/or two airtight end faces aligned transversely to the stacking direction. The two seals may separate the two further lateral faces from one another, from the two lateral faces, and from the two end faces in an airtight manner.

Abstract: A membrane humidifier has a housing and a membrane stack. The membrane stack includes two first stack sides aligned parallel to the assembly direction. The membrane humidifier has a sealing device with two first sealing frames, each with an inner sealing surface and an outer sealing surface. The housing has two first housing sealing surfaces. The first sealing frames are in sealing contact with the inner sealing surfaces on the first stack sides. The first sealing frames are in contact with the outer sealing surfaces on the first housing sealing surfaces. The outer sealing surfaces of the first sealing frames and the first housing sealing surfaces of the housing are each aligned at a mounting angle to the first stack sides and to the mounting direction that is not zero. In addition, an arrangement is provided which includes the membrane humidifier and the sealing device for the membrane humidifier.

Abstract: A fluid conduit coupling may include a tubular body, a connecting piece, and a securing clamp radially adjustable relative to the tubular body between a securing position and a release position. The connecting piece may have a securing groove extending in the circumferential direction, the tubular body may have a securing slot aligned radially to the securing groove when the connecting piece is inserted into the tubular body, and the securing clamp may have a securing web sticking out radially to the inside, and, in the securing position, radially engages with the securing groove through the securing slot, and, in the release position, does not radially engage with the securing groove. The tubular body may have at least one guide groove, and the securing clamp may have at least one guide web sticking out radially and, at least in the securing position, radially engages with the associated guide groove.

Abstract: A hose arrangement for a motor vehicle may include a flexible elongated bellows including a plurality of radially orientated pleats and two axial longitudinal ends. The hose arrangement may also include at least one reinforcement rib which, on an outside, is coupled to a pleat tip of a respective pleat of the plurality of pleats in a material-bonded manner via two-component injection moulding. The at least one reinforcement rib may engage about the respective pleat in a circumferential direction. The at least one reinforcement rib may have at least two rib segments disposed following one another in the circumferential direction. Each of the at least two rib segments may radially cover the pleat tip by a segment angle of 30° to 310° in the circumferential direction.

Abstract: A fluid conduit coupling for mechanically and fluidically coupling a fluid-conducting first component to a fluid-conducting second component, may include a tubular body, a connecting piece, which may be insertable coaxially into the tubular body, and a securing clamp, which may be arranged on an outside of the tubular body and which may surround the tubular body over more than 180° in a circumferential direction, and which may be radially adjustable relative to the tubular body between a securing position, in which the connecting piece cannot be pulled out of the tubular body, and a release position, in which the connecting piece is able to be pulled out of the tubular body.

Abstract: A humidifying module for humidifying a fluid, such as an operating fluid of a fuel cell of a motor vehicle, is disclosed. The humidifying module includes a humidifier block including a plurality of first fluid paths through which a first fluid is flowable and a plurality of second fluid paths through which a second fluid is flowable. The plurality of first fluid paths and the plurality of second fluid paths in the humidifier block are fluidically separated from each other via a plurality of gas-tight and humidity-permeable membranes. A liquid separator is provided that is fluidically connected to one of the first fluid paths for flow-through with the first fluid and the second fluid paths for flow-through with the second fluid.

Abstract: A hose arrangement for a motor vehicle may include a flexible elongated bellows including a plurality of radially orientated pleats and two axial longitudinal ends. The hose arrangement may also include at least one reinforcement rib which, on an outside, is coupled to a pleat tip of a respective pleat of the plurality of pleats in a material-bonded manner via two-component injection moulding. The at least one reinforcement rib may engage about the respective pleat in a circumferential direction. The at least one reinforcement rib may have at least two rib segments disposed following one another in the circumferential direction. Each of the at least two rib segments may radially cover the pleat tip by a segment angle of 30° to 310° in the circumferential direction.

Abstract: The invention concerns an elastomer hose to connect to a nozzle, wherein the elastomer hose comprises a circumferential edge at least at a longitudinal end. In one exemplary approach a support structure protrudes from a first circumferential section of the circumferential edge and by which the longitudinal end of the elastomer hose is connectable in a positively form-locking manner to a complementary counter-support structure on the nozzle. Additionally, a grip structure protruding from the circumferential edge in a second circumferential section, which is offset from the first circumferential section in a circumferential direction, at which the longitudinal end, is manually grippable when connecting the elastomer hose to the nozzle axially pullable up on to the nozzle.

Abstract: A coupling device for connecting at least two fluid-conducting components may include a connector that may have a securing ring. A locking ring may be arranged on the connector and be configured to transition in a circumferential direction between a securing position and a releasing position. The locking ring may include at least one locking element configured to interact with the securing ring. The locking element may be configured resilient in a radial direction. A connecting piece may be configured axially adjustable with respect to the connector and may include an outer securing groove. The locking element may radially engage into the securing groove when the locking ring is in the securing position to secure the connecting piece to the connector in the axial direction.

Abstract: An exemplary air filter may include an air-permeable filter body for cleaning air, and a filter housing for holding the filter body. The air filter may also include a clean-air port fluidically connected to the filter body and mechanically connected to the filter housing for attaching the air filter to a clean-air channel. The air filter may further include a first air-flow grid arranged in the clean-air port to stabilize the filtered air.

Abstract: A filter element having a longitudinal center axis for a fresh air system of an internal combustion engine may include a first plate filter body composed of a pleated filter material and a separate second plate filter body composed of a pleated filter material. The filter element may include first wall body and a second wall body, and a first end body and a second end body. The first wall body, the second wall body, the first end body and the second end body may be connected to the first plate body and the second plate filter body to define an inner space. At least one of the first plate filter body and the second plate filter body may include a curvature projecting to the interior space in a profile extending transversely to a longitudinal direction with respect to the longitudinal center axis.

Abstract: An exemplary air filter may include an air-permeable filter body for cleaning air, and a filter housing for holding the filter body. The air filter may also include a clean-air port fluidically connected to the filter body and mechanically connected to the filter housing for attaching the air filter to a clean-air channel. The air filter may further include a first air-flow grid arranged in the clean-air port to stabilize the filtered air.

Abstract: A filter element having a longitudinal center axis for a fresh air system of an internal combustion engine may include a first plate filter body composed of a pleated filter material and a separate second plate filter body composed of a pleated filter material. The filter element may include first wall body and a second wall body, and a first end body and a second end body. The first wall body, the second wall body, the first end body and the second end body may be connected to the first plate body and the second plate filter body to define an inner space. At least one of the first plate filter body and the second plate filter body may include a curvature projecting to the interior space in a profile extending transversely to a longitudinal direction with respect to the longitudinal center axis.

Abstract: A coupling device for connecting at least two fluid-conducting components may include a connector that may have a securing ring. A locking ring may be arranged on the connector and be configured to transition in a circumferential direction between a securing position and a releasing position. The locking ring may include at least one locking element configured to interact with the securing ring. The locking element may be configured resilient in a radial direction. A connecting piece may be configured axially adjustable with respect to the connector and may include an outer securing groove. The locking element may radially engage into the securing groove when the locking ring is in the securing position to secure the connecting piece to the connector in the axial direction.