Abstract: The invention relates to a thermoplastic tank (1) with at least one insert part which is provided in the interior of the tank (1) and is inserted into the tank (1) through an opening (3) in a tank wall (2) and is sealed against a peripheral flange (4) provided in the region of the opening (3). The flange (4) is formed integrally with the tank wall (2) and is countersunk therein.

Abstract: The invention relates to a device for storing and delivering an aqueous additive for catalytic exhaust-gas denitrogenization in a motor vehicle. The device comprises a storage vessel (1) enclosing a storage volume (2), comprises at least one delivery pump (8) for the additive, and comprises means for heating at least parts of the storage volume (2), wherein the device is characterized in that the storage vessel (1) is at least partially of double-walled form.

Abstract: The invention relates to a method of determining the retention capacity of fuel vapor filters for motor vehicles, wherein a temperature profile of the fuel is recorded on a motor vehicle in a SHED chamber during a temperature cycle. A fuel vapor volumetric flow for a temperature change is calculated from the temperature profile. In a measurement arrangement (1) fuel is evaporated by means of an evaporator (2) and is output by means of a charging pump (9) to a fuel vapor filter (4) disposed in an oven (5). The bleed emissions of the fuel vapor filter (4) are measured at least during the charging.

Abstract: The invention relates to a pressure equalizing valve (5) for a fuel tank or secondary fluid tank on a motor vehicle, comprising at least one valve housing (10), at least one valve body movably arranged in the valve housing (10), at least one venting opening on the tank side and on the connection side or on the atmosphere side, which form a venting path (16) which may be opened or closed by the valve body depending on the position of the tank, when a predetermined transverse force is exceeded relative to a normal force which holds the valve body in a valve seat, the valve body being able to be lifted or deflected from the valve seat and thus opening the venting path (16) and when falling below said transverse force automatically adopting again the position closing the venting path (16). The valve body is configured as a ball (15) and arranged so that when pressure prevails on the tank side, said valve body is held in the valve seat.

Abstract: The invention relates to a ventilating device (2) for liquid containers (1), in particular for liquid containers (1) for an aqueous urea solution, comprising a housing (3) which can be mounted at an opening of the liquid container (1) and has a first opening (4) to the liquid container (1) and a second opening (5) to the surroundings of the liquid container (1), a diaphragm (6) which is arranged within the housing (3), is permeable to air, is impermeable to liquid and is configured in such a way that a deformation of the diaphragm (6) takes place by a pressure change in the liquid container (1), as a result of which the volume within the housing (3) within the diaphragm (6) changes, with the result that the displaced volume leaves the housing (3) via the second opening (5) to the surroundings of the liquid container (1). Furthermore, the invention relates to a liquid container (1) having a ventilating device (2) according to the invention.

Abstract: The invention relates to a liquid reservoir (1), in particular for an aqueous urea solution, comprising a buffer storage means (2) arranged on the bottom of the liquid reservoir (1) in the installation position, a liquid delivery unit (3), at least one, preferably a plurality of first filter elements (4) arranged on the bottom in the installation position outside the buffer storage means (2), each of which first filter elements is connected to the liquid delivery unit (3) via a liquid line (5), the first filter elements (4) being constructed such that the filter fabric of the first filter elements (4) is permeable to the liquid located in the liquid reservoir (1) and impermeable to air, a second filter element (6) being arranged between the interior of the buffer storage means (2) and the liquid delivery unit (3), which second filter element is constructed such that the filter fabric of the second filter element (6) is permeable to the liquid located in the liquid reservoir (1) and impermeable to air, the bre

Abstract: The invention relates to a thermoplastic tank (1) with at least one insert part which is provided in the interior of the tank (1) and is inserted into the tank (1) through an opening (3) in a tank wall (2) and is sealed against a peripheral flange (4) provided in the region of the opening (3). The flange (4) is formed integrally with the tank wall (2) and is countersunk therein.

Abstract: The invention relates to a reducing agent tank for holding a liquid reducing agent as a so-called SCR tank. The SCR tank comprises at least one device for deaerating the tank, which device is closed off by means of at least one pressure-compensating element which permits an exchange of gas but which closes off the tank in a liquid-tight manner. The reducing agent tank also comprises at least one deaeration line which communicates with the pressure-compensating element, with the deaeration line being guided at least to a point above the maximum permissible fording level of the tank when the tank is in the installation position. The deaeration line has at least one first downward-sloping line section which branches into a second rising line section for deaeration and a third falling line section for gravity-induced condensate drainage.

Abstract: The invention relates to a reducing agent tank 1 for holding a liquid reducing agent as a so-called SCR tank. The SCR tank comprises at least one device for deaerating the tank, which device is closed off by means of at least one pressure-compensating element which permits an exchange of gas but which closes off the tank in a pressure-tight manner. The reducing agent tank (1) also comprises at least one deaeration line (5) which communicates with the pressure-compensating element, with the deaeration line (5) being guided at least to a point above the maximum permissible fording level of the tank when the tank is in the installation position. The deaeration line (5) has at least one first downward-sloping line section (5a) which branches into a second rising line section (5b) for deaeration and a third falling line section (5c) for gravity-induced condensate drainage (FIG. 1).

Abstract: The invention relates to a reducing agent tank (1) for motor vehicles, having at least one filler pipe (3) which is provided with a filler opening (4), having at least one device for filling deaeration and having means for limiting the fill level during filling, with the device for filling deaeration comprising at least one filling deaeration line (7) which extends at least in sections above the maximum fill level in the filler pipe (3) and/or in the tank (FIG. 2).

Abstract: A fuel tank for a motor vehicle, conveys fuel from the tank to an internal combustion engine of the vehicle, and includes a filling connection with a filling opening. The tank comprises an improved venting arrangement for venting the tank during refuelling and during operation thereof, with at least one fuel vapor filter by way of which the fuel tank is vented. The fuel vapor filter is of a two-stage configuration having first and second filter stages in the direction of flow in venting. A refuelling venting conduit is branched off after the first filter stage and is communicatable with the atmosphere or the tank interior.

Abstract: A compact venting valve for the fuel tank of a motor vehicle comprises a valve housing with at least one switchable element for providing at least two switching positions and with at least three connections, a first connection to the fuel tank or to a fuel vapor filter connected downstream thereof, a second connection to a filling pipe of a fuel tank and a third connection to atmosphere. The valve housing includes at least one first filter chamber enclosing a second fuel vapor filter, wherein a first switching position provides for operational venting of the fuel tank in which a flow path between the first and second connections is enabled and a second switching position provides for refuelling venting of the fuel tank in which a flow path between the first and second connections is enabled with the second fuel vapor filter being bypassed.

Abstract: A compact venting valve for the fuel tank of a motor vehicle comprises a valve housing with at least one switchable element for providing at least two switching positions and with at least three connections, a first connection to the fuel tank or to a fuel vapor filter connected downstream thereof, a second connection to a filling pipe of a fuel tank and a third connection to atmosphere. The valve housing includes at least one first filter chamber enclosing a second fuel vapor filter, wherein a first switching position provides for operational venting of the fuel tank in which a flow path between the first and second connections is enabled and a second switching position provides for refuelling venting of the fuel tank in which a flow path between the first and second connections is enabled with the second fuel vapor filter being bypassed.

Abstract: The invention concerns a fuel tank for a motor vehicle, comprising means for conveying fuel from the tank to an internal combustion engine of the vehicle, and a filling connection with a filling opening. The tank also has means for venting the tank during refuelling and during operation thereof, with at least one fuel vapor filter by way of which the fuel tank is vented. The fuel vapor filter is of a two-stage configuration having first and second filter stages in the direction of flow in venting. A refuelling venting conduit is branched off after the first filter stage and is communicatable with the atmosphere or the tank interior.

Abstract: In a method of pressure and/or gas volume compensation within a fuel tank in relation to movement-induced and/or temperature-induced changes in pressure and/or volume, as when fuel is drawn from the tank and upon refuelling of the tank, any changes in pressure outside a predetermined normal pressure range are compensated by condensation of the gaseous fuel or gasification of the liquid fuel within a system which is hermetically closed off at least above atmospheric pressure. The invention also provides a tank operating on that basis.

Abstract: In a method of pressure and/or gas volume compensation within a fuel tank in relation to movement-induced and/or temperature-induced changes in pressure and/or volume, as when fuel is drawn from the tank and upon refuelling of the tank, any changes in pressure outside a predetermined normal pressure range are compensated by condensation of the gaseous fuel or gasification of the liquid fuel within a system which is hermetically closed off at least above atmospheric pressure. The invention also provides a tank operating on that basis.