Expansion tank for a fluid circuit of a motor vehicle and method for producing such an expansion tank

Abstract

The invention relates to an expansion tank (1) for a fluid circuit of a motor vehicle, comprising a tank wall (2) enclosing an interior space (3) of the expansion tank (1), and comprising a vent valve (4) fluidically connected to the interior space (3) for venting the expansion tank (1). The vent valve (4) comprises a receiving socket (5) formed integrally and of the same material as the tank wall (2), and a valve element (6) inserted into the receiving socket (5) and mounted therein for rotation about a rotational axis (16). A flow connection through the vent valve (4) is interrupted in a first position of the valve element (6) by an interaction of the valve element (6) with the receiving socket (5), and is released in a second position of the valve element (6).The invention further relates to a method for producing an expansion tank (1) for a fluid circuit of a motor vehicle.

Description

The invention relates to a compensation container for a fluid circuit of a motor vehicle, having a container wall enclosing an interior of the compensation container and having a venting valve connected fluidically to the interior for venting the compensation container. The invention further relates to a method for producing a compensation container for a fluid circuit of a motor vehicle.The prior art discloses, for example, the publication DE 40 25 067 C1. This relates to a venting line in the cooling circuit of an internal combustion engine, wherein the venting line connects a cooler to a compensating tank situated at a higher level with respect to its ceiling at an upper portion of the compensating tank. In order to avoid air entrapment within the venting line, a venting valve in the form of a flap or a diaphragm valve is set up at the highest point of the venting line, via which venting valve the entrapped air can be drawn off during the driving operation and during filling. Due to the arrangement of the venting valve within the compensation tank, the cooling water expanding during engine operation and exiting via the venting valve remains in the compensation tank.Furthermore, the document DE 10 2005 004 518 A1 discloses a compensation tank for a coolant for a cooling circuit, in particular for a low-temperature circuit for indirect charge air cooling for an internal combustion engine, having a compensation tank housing on which at least one coolant inflow device, through which coolant can be introduced into the compensation tank, and a coolant outflow device, through which coolant can be discharged from the compensation tank, are arranged. It is provided here that a compensation chamber with a compensation chamber coolant inlet device and a compensation chamber coolant outlet device is formed in the compensation chamber housing, through which coolant can be introduced into the compensation chamber and discharged from the compensation chamber, and a coolant direct guidance means is arranged on the compensation chamber housing, through which the coolant inflow device and the coolant outflow device are connected to one another in such a way that at least a coolant partial flow of a coolant flow flowing in through the coolant inflow device can be directly flowed from the coolant inflow device to the coolant outflow device without inflow into the compensation chamber.Furthermore, the documents DE 10 2010 033 715 A1, U.S. Pat. No. 2015 / 0 345 368 A1, WO 2020 / 080 096 A1, DE 10 2021 123 563 A1, DE 10 2013 226 420 A1 and DE 10 2021 118 799 A1 are known from the prior art.It is the object of the invention to propose a compensation container for a fluid circuit of a motor vehicle, which has advantages compared to known compensation containers, in particular can be produced simply and cost-effectively and is space-saving.This is achieved according to the invention with a compensating container for a fluid circuit of a motor vehicle having the features of claim 1. It is provided here that the venting valve has a receiving connection piece which is configured integrally and materially uniformly with the container wall and a valve element which is inserted into the receiving connection piece and is mounted rotatably in it about an axis of rotation, wherein a flow connection through the venting valve is interrupted in a first position of the valve element by an interaction of the valve element with the receiving connection piece and is released in a second position of the valve element.Advantageous embodiments with expedient developments of the invention are specified in the dependent claims. It is pointed out that the exemplary embodiments explained in the description are not restrictive; rather, any variations of the features disclosed in the description, the claims and the figures can be realized.The compensating container is preferably a component of the fluid circuit of the motor vehicle, but can of course also be separate from the latter. The fluid circuit is, for example, a coolant circuit in which coolant is circulated at least temporarily for the purpose of tempering a device to be tempered. In addition to the compensation tank, the coolant circuit thus comprises at least the device to be temperature-controlled, but preferably also a coolant cooler and a coolant pump. The coolant cooler serves for cooling the coolant, the coolant pump serves for circulating the coolant. For example, the coolant is supplied from the coolant pump to the device to be temperature-controlled, in which the coolant absorbs heat. The coolant is then passed further into the coolant cooler, in which it releases the previously absorbed heat again, in particular to a cooling medium. Ambient air is preferably used as the cooling medium; the coolant cooler is present, for example, as the main cooler of the motor vehicle.The compensating container has the interior in which a fluid, for example the fluid used for operating the fluid circuit, is stored at least temporarily. The interior space is enclosed by the container wall of the compensation container, wherein at least one opening is present in the container wall, via which opening, for example, fluid connections of the compensation container are fluidically connected to the interior space. One of the fluid connections is present in particular as an inlet connection and another of the fluid connections is present as an outlet connection, via which further regions of the fluid circuit are fluidically connected to the compensation container or its interior. Furthermore, an opening closed by a lid can be present in the container wall, through which opening fluid can be introduced into the interior space.In addition to the container wall, the venting valve is present as a component of the equalizing container. This serves for venting the compensating container, for which purpose, for example, fluid is introduced into the interior and / or fluid is discharged from the interior. The fluid supplied to the interior is in particular a liquid fluid, whereas the fluid removed from the interior is preferably a gaseous fluid, in particular a gas mixture, for example a fluid-air mixture.For example, it is provided that during the production of the compensating container a venting opening is produced in the container wall and the venting valve is subsequently connected thereto in terms of flow, for example by a connecting piece of the venting valve being arranged overlapping the venting opening or being introduced into it and the venting valve being fastened to the container wall. However, this is comparatively complicated and requires a large number of laborious steps both in the production of the individual parts and in the assembly of the compensating container.For this reason, the venting valve should be designed in such a way that simple and cost-effective production of the compensation container can take place. In addition, the compensating container together with the venting valve arranged on it should be of particularly compact construction. The venting valve of the compensating container according to the invention has the receiving connection piece and the valve element. The receiving connection piece is configured in one piece and materially uniformly with the container wall, in particular it is produced together with the container wall, preferably by injection molding. The receiving connection piece extends outwards starting from the container wall, in particular thus starting from the vent opening which is produced in the container wall and is surrounded by the receiving connection piece. The receiving connection piece is in this respect rigidly and permanently connected to the container wall, in particular it cannot be separated from the container wall without damage.The valve element is inserted into the receiving connection piece and is rotatably mounted therein, namely about the axis of rotation. For this purpose, the receiving connection has a valve element receptacle which is preferably straight throughout and opens through the vent opening into the interior of the compensation container. The valve element receptacle can also be referred to as a valve chamber. The receiving connection piece and the valve element are designed such that they cooperate in different positions of the valve element with respect to the receiving connection piece, preferably in different rotational angle positions of the valve element with respect to the axis of rotation, in order either to interrupt or to release the flow connection through the venting valve selectively.The valve element can be arranged with respect to the receiving connection piece at least in the first position and the second position. In the first position of the valve element, the receiving connection piece and the valve element cooperate in such a way that the flow connection through the venting valve is interrupted, that is to say the venting valve is closed. In the second position of the valve element, on the other hand, the flow connection through the venting valve is at least partially, preferably completely, released. For example, the second position corresponds to a position of the valve element in this respect, in which the largest flow cross section of the venting valve is present across all positions of the valve element.More generally, the flow connection through the venting valve has a first flow cross section in the first position of the valve element and a second flow cross section in the second position of the valve element, wherein the second flow cross section is larger than the first flow cross section. The first flow cross section is preferably equal to zero, so that the flow connection through the venting valve in the first position of the valve element is not only partially interrupted, but rather completely interrupted. The second flow cross section preferably corresponds to the aforementioned largest flow cross section through the valve element over all positions of the valve element that are possible during an intended operation of the compensation container.For producing the compensating container, it is only necessary overall to configure the receiving connection piece in one piece and in the same material as the container hand and subsequently to insert the valve element into the receiving connection piece. Preferably, the valve element is designed for latching with the receiving connection piece and / or the container wall, so that the valve element is held in a form-fitting manner, namely in the axial direction with respect to the axis of rotation, but at the same time is rotatable in the circumferential direction with respect to the axis of rotation. This achieves the advantages already mentioned. In addition, better tightness can be realized and the compensating container is suitable for use of the venting valve together with a securing pin.A further development of the invention provides that a passage opening is produced in a wall of the receiving connection outside the interior space, which is closed by the valve element in the first position of the valve element and is released in the second position. The receiving connection piece or at least the wall in which the passage opening is present is arranged on the outside of the compensating container, in particular therefore on the side of the container wall facing away from the interior. The wall is preferably configured in one piece and materially uniformly with the container wall, in particular it starts directly from the container wall and extends outwards therefrom. The wall contains the passage opening, which is preferably closed at the edge.The wall is, for example, cylindrical, in particular circular cylindrical. In this case, the passage opening is present in a lateral surface of the cylinder forming the wall. In particular, the passage opening is present at a distance from the longitudinal central axis, namely at a distance in the radial direction. For example, the passage opening is curved around the axis of rotation. In particular, it is present in an imaginary lateral surface of an imaginary cylinder around the axis of rotation.The valve element is arranged and configured in such a way that in its first position it closes the passage opening further than in the second position, in particular the first position, completely and in the second position it at least partially or even completely releases it. In particular, the valve element extends beyond the passage opening in the first position further than in the second position, preferably completely in the first position. For example, it is provided that the valve element is designed asymmetrically in the region of the passage opening and is located at a greater distance from the passage opening in the second position than in the first position, in particular viewed in the radial direction. However, it can also be provided that the valve element itself has an opening which, in the second position, is arranged to overlap the passage opening further than in the first position. The described configuration of the compensation container can be implemented simply and cost-effectively.A further development of the invention provides that the passage opening is an orifice opening, via which a connecting piece produced integrally and materially uniformly with the receiving connector leads into a valve space present in the receiving connector. The connecting piece starts from the receiving piece outside the interior. For example, a longitudinal central axis of the connecting piece is perpendicular to a longitudinal central axis of the receiving piece and / or to the axis of rotation of the valve element. The connecting piece has a length, in particular in the radial direction, which is greater by at least 50%, at least 100% or at least 200% than dimensions of the receiving piece in the radial direction with respect to the axis of rotation overlapping with the orifice opening, that is to say in a cross section of the receiving piece which passes centrally through the orifice opening.The connecting piece serves, for example, for connecting a fluid line to the venting valve or to the compensating container. A hose line is used as the fluid line, for example. Particularly preferably, the connecting piece therefore has a hose spout or olive on its side facing away from the receiving piece.The passage opening or mouth opening opens into the valve chamber which is present in the receiving connection piece. The valve chamber is to be understood in this respect as an interior of the receiving connector which is connected in terms of flow to the interior of the compensating container, in particular permanently. The valve element is arranged in the valve chamber or the valve element engages at least in regions in the valve chamber in order to cooperate with the passage opening for closing or releasing the passage opening. This embodiment of the compensating container has the advantage that a flow connection to a fluid source or a fluid supply can be produced in a simple manner.A further development of the invention provides that the valve element completely reaches through the receiving connection piece in the axial direction with respect to the axis of rotation. This means that the valve element extends from one side of the receiving connector to its other side as viewed in the axial direction with respect to the axis of rotation and protrudes beyond the receiving connector on both sides, in particular in the axial direction. This makes it possible to achieve simple mounting of the valve element, for example the aforementioned form-fitting fastening of the valve element on the receiving connector.A further development of the invention provides that a latching device of the valve element engages behind a first end face of the receiving connector present in the interior of the compensation container in a latching manner. The latching device serves for fixing the valve element with respect to the receiving connection piece in the axial direction, but permits the rotational movement of the valve element with respect to the receiving connection piece about the axis of rotation. The first end face of the receiving connector is arranged in the interior of the compensation container, for which purpose the receiving connector reaches through the container wall of the compensation container from the direction of an external environment of the compensation container into the interior of the compensation container.The latching device has at least one elastic latching element which, for inserting the valve element into the receiving connector, is temporarily elastically deflected from a starting position and, in an assembly position of the valve element, deforms elastically with respect to the receiving connector back in the direction of its starting position, so that it engages behind the receiving connector or its first end side in a latching manner. Particularly preferably, a plurality of latching elements are present on the valve element, which are spaced apart from one another in the circumferential direction with respect to the axis of rotation, in particular are uniformly spaced apart from one another. The described configuration of the compensating container enables particularly rapid and simple assembly.A further development of the invention provides that an adjusting head of the valve element overlaps a second end face of the receiving connection piece in the radial direction with respect to the axis of rotation. The adjustment head serves in particular for manual adjustment of the valve element, i.e. its rotation about the axis of rotation. For this purpose, the adjusting head is present in the external environment of the compensating container, insofar as on the side of the container wall facing away from the interior. There is also the second end face of the receiving connector, which the adjusting head overlaps in the radial direction, i.e. extends outwards in the radial direction in such a way that it has larger dimensions than the receiving connector on its second end face. For example, the adjusting head is provided and configured to support the valve element at least temporarily on the receiving connector in the axial direction and for this purpose lies at least temporarily on the second end face of the receiving connector. This in turn allows simple assembly of the compensation tank and also simple operation of the venting valve for venting the compensation tank.A further development of the invention provides that a connecting space of the valve element is bounded by a casing wall of the valve element in the radial direction with respect to the axis of rotation and passes through the valve element in the axial direction on the one hand. The valve element is thus at least partially hollow cylindrical, in particular hollow circular cylindrical. It accommodates the connecting space which is bounded outward in the radial direction by the almond wall. In the axial direction, the connecting space reaches through the valve element only on one side, namely on its side facing the interior of the compensating container. On the other hand, the connecting space is bounded in the axial direction by the valve element, for example by the adjusting head of the valve element. The connecting space is present in this respect as a blind opening in the valve element. It is preferably permanently in fluidic connection with the interior of the compensating container, in particular it starts directly from the interior. Such a configuration of the valve element is again of a structurally simple design.A further development of the invention provides that a valve opening formed in the jacket wall and opening into the connecting space is arranged spaced apart from the passage opening in the first position of the valve element and at least partially overlaps it in the second position. The valve opening starts from the connecting chamber of the valve element in the radial direction and extends completely through the jacket wall in the radial direction towards the outside. The valve opening thus extends through the casing wall of the valve element both in the radial direction on the inside and in the radial direction on the outside. The valve opening is arranged in the axial direction at least partially overlapping with the passage opening, so that in the different positions it is arranged differently pronounced overlapping with the passage opening.Preferably, in the first position of the valve element, the valve opening is arranged spaced apart from the passage opening in the circumferential direction, so that there is no overlap between them. In the second position, on the other hand, the valve opening and the passage opening are at least partially overlapped, preferably fully overlapped in the circumferential direction. For example, for this purpose the valve opening and the passage opening have identical dimensions or identical diameters. However, it can also be provided that the valve opening and the passage opening are in overlap with one another further in the second position than in the first position, wherein the overlap in the first position can be equal to zero or even greater than zero. In any case, the described configuration of the compensating container achieves the advantages likewise already mentioned.A further development of the invention provides that a seal is arranged on the valve element on a side of the passage opening and / or of the valve opening facing away from the interior. The seal serves for sealing the valve element and the receiving connection piece with respect to one another. The seal thus bears on the one hand on the valve element and on the other hand on the receiving connection piece, in particular on the valve element on the inside in the radial direction and on the receiving connection piece on the outside in the radial direction. Preferably, the seal is continuous both on the valve element and on the receiving connection piece in the circumferential direction with respect to the axis of rotation. For example, it is designed as an O-ring.Preferably, the seal is arranged in a receiving groove which is produced in the valve element or in the receiving connection piece. However, the arrangement of the seal on the valve element or the arrangement of the seal in a receiving groove produced in the valve element has the advantage that the seal can be arranged on the valve element before the introduction of the valve element into the receiving connection piece, so that the seal is introduced together with the valve element into the receiving connection piece. This results in simple assembly with only a few steps. The seal is arranged on the side of the passage opening and / or the valve opening facing away from the interior, such that a reliable seal between the interior and the external environment of the compensation container is ensured with the aid of the seal.The invention naturally also relates to a fluid circuit of a motor vehicle having a compensation container as explained in this description. With regard to the advantages and possible advantageous embodiments, reference is made to the explanations in this description.Furthermore, the invention relates to a method for producing a compensation container for a fluid circuit of a motor vehicle, namely a compensation container according to the explanations in this description, wherein the compensation container has a container wall enclosing an interior of the compensation container and a venting valve connected fluidically to the interior for venting the compensation container. It is provided here that a receiving connection piece of the venting valve is configured integrally and materially uniformly with the container wall and a valve element is inserted into the receiving connection piece and is mounted therein such that it can rotate about an axis of rotation, wherein a flow connection through the venting valve is interrupted in a first position of the valve element by an interaction of the valve element with the receiving connection piece and is released in a second position of the valve element.The advantages of such a configuration of the compensation container or such a procedure have already been pointed out. Both the compensation container and the method for producing it can be further developed according to the explanations within the scope of this description, so that in this respect reference is made to it.Finally, the invention also relates to a method for operating a compensation tank for a fluid circuit of a motor vehicle, wherein the compensation tank is again configured according to the explanations in this description. During the operation of the compensating container, the valve element is at least temporarily displaced from its first position into the second position in order to release the flow connection through the venting valve. When the flow connection is released, the fluid is supplied to the compensating container via the venting valve, in particular in order to force air out of the fluid circuit or in order to introduce additional fluid into it when the fluid circuit is closed.The features and combinations of features described in the description, in particular the features and combinations of features described in the following description of the figures and / or shown in the figures, can be used not only in the respectively specified combination but also in other combinations or alone without departing from the scope of the invention. Embodiments are therefore also to be considered as encompassed by the invention which are not explicitly shown or explained in the description and / or the figures, but which emerge from the explained embodiments or can be derived from them.The invention is explained in more detail below with reference to the exemplary embodiments shown in the drawing, without any restriction of the invention being effected. The following shows: FIG. 1 shows a schematic illustration of a region of a compensation tank having a tank wall enclosing an interior space of the compensation tank and a venting valve, wherein a valve element of the venting valve is arranged in a first position, FIG. 2 shows a schematic illustration of the region of the outlet container, wherein the valve element is in a second position, FIG. 3 shows a schematic sectional illustration of the compensating container in the region of the valve element, and FIG. 4 shows a schematic illustration of the valve element.FIG. 1 shows a schematic illustration of a compensation tank 1 for a fluid circuit of a motor vehicle. The compensation container 1 has a container wall 2 which encloses an interior 3 of the compensation container 1. Furthermore, the compensating container 1 has a venting valve 4 which has as essential components at least one receiving connection 5 and a valve element 6. The venting valve 4 is designed in such a way that, in the first position of the valve element 6 shown here with respect to the receiving connection 5, a flow connection through the venting valve 4 is completely interrupted, whereas it is released or produced in a second position.The receiving connection 5 of the venting valve 4 is produced integrally and materially uniformly with the container wall 2. This is to be understood as meaning that the container wall 2 and the receiving connection piece 5 consist of one piece and of the same material. Provision can be made for the receiving connection 5 and the container wall 2 to be produced jointly, that is to say during a common production step and with a common production method. For example, the receiving connection 5 and the container wall 2 are produced jointly by injection molding. However, it can also be provided that the container wall 2 and the receiving connector 5 are produced separately from one another and subsequently connected to one another in a materially bonded manner, for example by adhesive bonding or by welding. In this case too, however, they are materially uniform.In the exemplary embodiment shown, the receiving connector 5 protrudes beyond the container wall 2 on opposite sides, i.e. extends starting from the container wall 2 both into the interior 3 and onto the side of the container wall 2 opposite the interior 3.The receiving connection 5 has a wall 9, through which a passage opening 10 passes outside the interior 3. A connecting piece 11 is fluidically connected via the passage opening 10 to a valve chamber 12 present within the receiving piece 5, wherein the valve chamber 12 is bounded by the wall 9 and is permanently in fluidic connection with the interior 3. In the exemplary embodiment shown, the connecting piece 11 is provided with a hose sleeve 13 on its side facing away from the receiving piece 5. Purely by way of example, an embodiment of the compensation container 1 is shown in which, in addition to the passage opening 10 and the connecting piece 11, a further passage opening 14 and a further connecting piece 15 are present. Preferably, the connecting pieces 11 and 15 are arranged offset parallel to one another. They are both connected in terms of flow to the valve chamber 12, namely the connecting piece 11 via the passage opening 10 and the connecting piece 15 via the passage opening 14.The valve element 6 is mounted in the receiving connection piece 5 about an axis of rotation 16. In this case, the valve element 6 extends completely through the receiving connection piece 5 in the axial direction, i.e. protrudes beyond the receiving connection piece 5 on both sides. On its side facing the interior 3, the valve element 6 has a latching device 17, by means of which it is rotatable about the axis of rotation 16, but fixed in the axial direction in the receiving connection 5. For this purpose, the latching device 17 has a plurality of latching elements 18 which engage behind the receiving connection piece 5, namely on its first end face 7. The adjusting head 19 is designed, for example, as a polygonal head, so that it can be rotated by means of a corresponding wrench.In the valve element 6, a connecting chamber 20 is present, which, on the one hand, extends through the valve element 6, so that it is permanently connected to the interior 3 in terms of flow. On the other hand, the connecting chamber 20 is closed, for example by the adjusting head 19. At least one valve opening 22 is produced in the jacket wall 21, in the exemplary embodiment shown two valve openings 22, The valve openings 22 are arranged in such a way that they are more or less in overlapping relationship with the passage openings 10 and 14 as a function of a rotational angle position of the valve element 6 with respect to the axis of rotation 16.In particular, the valve openings 22 are present at the same circumferential position, so that they uniformly overlap the passage openings 10 and 14 at a given rotational angle position of the valve element 6. In the first position of the valve element 6 shown here, the jacket wall 21 of the valve element 6 closes the passage openings 10 and 14 and the valve openings 22 are arranged spaced apart from the passage openings 10 and 14 in the circumferential direction. The venting valve 4 is thus closed. For sealing the venting valve, a seal 23 designed as an O-ring is arranged on the valve element 6. This is inserted together with the valve element 6 into the receiving connection 5.FIG. 2 again shows a schematic illustration of the compensation container 1, wherein now, however, the valve element 6 is arranged in its second position. In this, the flow connection through the venting valve 4 is released, namely in that the valve openings 22 are at least partially or (as shown here) completely overlapped with the passage openings 10 and 14. Accordingly, the connecting pieces 11 and 15 are fluidically connected to the interior 3.FIG. 3 shows a schematic longitudinal sectional illustration of the compensating container 1 in the region of the valve element 6, It can be clearly seen that the latching elements 18 engage behind the receiving connection piece 5 in order to fix the valve element 6 in the axial direction with respect to the axis of rotation 16.FIG. 4 shows a schematic illustration of the valve element 6. Overall, the compensation container 1 can be produced simply and cost-effectively in comparison with known compensation containers. In addition, the venting valve 4 is of very compact construction.LIST OF REFERENCE CHARACTERS:1 Equalizing container 2 container wall 3 interior space 4 venting valve 5 receiving connector 6 valve element 7 1st end face 8 2nd end face 9 wall 10 through opening 11 connecting connector 12 valve space 13 hose nozzle 14 through opening 15 connecting connector 16 axis of rotation 17 latching device 18 latching element 19 adjusting head 20 connecting space 21 casing wall 22 valve opening 23 seal

Claims

Compensating container (1) for a fluid circuit of a motor vehicle, having a container wall (2) enclosing an interior (3) of the compensating container (1) and having a venting valve (4) connected fluidically to the interior (3) for venting the compensating container (1), characterized in that the venting valve (4) has a receiving connection piece (5) which is configured integrally and materially uniformly with the container wall (2) and a valve element (6) which is inserted into the receiving connection piece (5) and is mounted rotatably therein about an axis of rotation (16), wherein a flow connection through the venting valve (4) is interrupted in a first position of the valve element (6) by interaction of the valve element (6) with the receiving connection piece (5) and is released in a second position of the valve element (6).Compensating container according to claim 1, characterised in that a passage opening (10) is produced in a wall (9) of the receiving connection piece (5) outside the interior space (3), which is closed by the valve element (6) in the first position of the valve element (6) and is released in the second position.Compensating container according to claim 2, characterised in that the passage opening (10) is an opening opening, via which a connecting piece (11) produced in one piece and materially uniformly with the receiving connection piece (5) opens into a valve chamber (12) present in the receiving connection piece (5).Compensating container according to one of the preceding claims, characterized in that the valve element (6) completely reaches through the receiving connection piece (5) in the axial direction with respect to the axis of rotation (16).Compensating container according to one of the preceding claims, characterized in that a latching device (17) of the valve element (6) engages behind a first end side (7) of the receiving connection piece (5) present in the interior (3) of the compensating container (1) in a latching manner.Compensating container according to one of the preceding claims, characterized in that an adjusting head (19) of the valve element (6) engages over a second end face (8) of the receiving connection piece (5) in the radial direction with respect to the axis of rotation (16).Compensating container according to one of the preceding claims, characterized in that a connecting space (20) of the valve element (6) is bounded in the radial direction with respect to the axis of rotation (16) by a casing wall (21) of the valve element (6) and passes through the valve element (6) on the one hand in the axial direction.Compensating container according to claim 7, characterised in that a valve opening (22) formed in the jacket wall (21) and opening into the connecting space (20) is arranged spaced apart from the through-opening (10) in the first position of the valve element (6) and at least partially overlaps it in the second position.Compensating container according to one of Claims 2, 3 and 8, characterized in that a seal (23) is arranged on the valve element (6) on a side of the passage opening (10) and / or of the valve opening (22) facing away from the interior space (3).Method for producing a compensation container (1) for a fluid circuit of a motor vehicle, namely a compensation container (1) according to one or more of the preceding claims, wherein the compensation container (1) has a container wall (2) enclosing an interior (3) of the compensation container (1) and a venting valve (4) connected fluidically to the interior (3) for venting the compensation container (1), characterized in that a receiving connection piece (5) of the venting valve (4) is configured in one piece and in the same material as the container wall (2), and a valve element (6) is inserted into the receiving connection piece (5) and is mounted rotatably therein about an axis of rotation (16), wherein a flow connection through the venting valve (4) is interrupted in a first position of the valve element (6) by a cooperation of the valve element (6) with the receiving connection piece (5) and is released in a second position of the valve element (6).

Images