Fluid line arrangement and method for operating a fluid line arrangement

Abstract

A fluid line arrangement (15) comprising a first fluid-conducting device (16), a second fluid-conducting device (13), and a hose line (17) connectable to the first device (16) and the second device (13) for establishing a flow connection between the first device (16) and the second device (13), wherein the hose line (17) has a useful passage (20) fluidly connectable to a useful connection (21) of the first device (16) by means of a first connecting piece (18) and to a useful connection (22) of the second device (13) by means of a second connecting piece (19), wherein the first connecting piece (18) is designed to establish a flow connection between a diagnostic passage (23) of the hose line (17), separate from the useful passage (20), and a diagnostic connection (24) of the first device (16), separate from the useful connection (21), characterized in thatthat the second connection piece (19) is designed such that, when arranged on the second device (13), it establishes the flow connection between the useful passage (20) and the useful connection (22) of the second device (16) and closes the diagnostic passage (23) by interacting with the second device (13).

Description

The invention relates to a fluid line arrangement, having a first fluid-conducting device, a second fluid-conducting device and a hose line, which can be connected to the first device and the second device, for producing a flow connection between the first device and the second device, wherein the hose line has a service passage, which can be connected in fluid terms by means of a first connection piece to a service connection of the first device and by means of a second connection piece to a service connection of the second device, wherein the first connection piece is designed for producing a flow connection between a diagnostic passage of the hose line, which is separate from the service passage, and a diagnostic connection of the first device, which diagnostic passage is separate from the service connection. The invention further relates to a fluid line arrangement.The fluid line arrangement consists at least of the two fluid-conducting devices, namely the first fluid-conducting device and the second fluid-conducting device, and of the hose line. The hose line is a flexible line, by means of which the flow connection between the first device and the second device is or can be established. For this purpose, the hose line can be connected on the one hand to the first device and on the other hand to the second device. For this purpose, the first connecting piece and the second connecting piece are provided. This means that the hose line does not directly engage the fluid-conducting devices, but is only indirectly connected to the latter via the connecting pieces.The hose line thus engages on the one hand on the first connecting piece and on the other hand on the second connecting piece, wherein the connecting pieces are in turn connected to the respective fluid-conducting device, in particular are fastened to the latter. The hose line has the utility passage, which can be connected in terms of flow via the connecting pieces to the utility connections of the fluid-conducting devices. After establishing the flow connection, the service connection of the first device is in this respect fluidically connected to the service connection of the second device via the connecting pieces and the service passage of the hose line.The fluid line arrangement is, for example, a component of a drive device for a motor vehicle. In particular, the hose line serves as a circulating air hose line and in this respect for returning fresh gas, for example fresh air, compressed by means of a compressor into a line present upstream of the compressor. In this respect, a flow connection can be established between a pressure side and a suction side of the compressor via the hose line. For this purpose, for example, the first device is a throttle valve connection and the second device is an air filter or an air filter adapter, via which the air filter is connected to the compressor. The service connection of the first device is in this respect fluidically connected downstream of the compressor and the service connection of the second device is upstream thereof.The prior art discloses, for example, the publication DE 39 17 013 A1. This describes a safety hose for supplying water into an upper housing region of a household appliance. In this case, a casing tube which is hermetically sealed on the inlet side is provided. A machine-side screw coupling of a pressure hose is at least partially surrounded by an open-top shell which has a connecting piece for the enveloping hose outside a machine housing and a connecting piece for a leakage water guide hose inside the housing.Furthermore, the documents US 2010 / 0 175 772 A1 and U.S. Pat. No. 8 820 794 B1 are known from the prior art.It is the object of the invention to propose a fluid line arrangement which has advantages over known fluid line arrangements, in particular ensures a reliable flow connection between the first fluid-conducting device and the second fluid-conducting device.This is achieved according to the invention with a fluid line arrangement having the features of claim 1. It is provided that the second connecting piece is designed such that, when it is arranged on the second device, it establishes the flow connection between the useful passage and the useful connection of the second device and closes the diagnostic passage by interacting with the second device.The first connecting piece thus serves not only for establishing the flow connection between the service passage and the service connection of the first device, but additionally for establishing the flow connection between the diagnostic passage and the diagnostic connection of the first device. The diagnostic passage is formed separately from the useful passage in the hose line. The diagnostic connection is also formed separately from the useful connection of the first device. As soon as the first connecting piece is arranged on the first device, both flow connections, i.e. the flow connection between the service passage and the service connection and the flow connection between the diagnostic passage and the diagnostic connection, are produced.The second connecting piece, on the other hand, is designed in such a way that, when it is arranged on the second device, the flow connection between the service passage and the service connection of the second device is indeed established, but the diagnostic passage is closed. In this way, it can be determined by the first device whether the hose line is connected tightly to the first device and the second device. For example, a sensor, in particular a pressure sensor, is provided for this purpose, by means of which the pressure present at the diagnostic connection can be measured. If the measured pressure deviates from a setpoint value, it can be concluded that the hose line has been detached or has been detached from the first device or the second device, or that the hose line has a defect.This defect can consist in a flow connection being present between the diagnostic passage and an external environment of the hose line or of the fluid line arrangement. Another possibility for such a defect is a flow connection between the useful passage and the diagnostic passage. Preferably, both defects are readily detectable.It can of course be provided that the second connecting piece has correspondingly designed means for closing the diagnostic passage when it is arranged on the second device. Preferably, however, the first connecting piece and the second connecting piece are configured identically and are thus present as identical parts. In such a configuration, the second connecting piece interacts with the second device for closing the diagnostic passage when the second connecting piece is arranged on the second device. In such an embodiment of the fluid line arrangement, the described diagnosis can be realized in a particularly simple manner.A further development of the invention provides that the useful passage and the diagnostic passage are fluidically parallel. Both the useful passage and the diagnostic passage are present along the entire longitudinal extent of the hose line. In this case, they are fluidically parallel to one another, that is to say are separated from one another in terms of flow.A further embodiment of the invention provides that the diagnostic passage surrounds the useful passage continuously in the circumferential direction. In order to be able to reliably determine a defect in the hose line, the diagnostic passage should be designed accordingly. For this purpose, it preferably fully encompasses the useful passage in the circumferential direction, in particular over the entire longitudinal extent of the hose line. With such a configuration of the hose line, a direct flow connection of the utility passage to the external environment of the fluid line arrangement is prevented even in the event of a leak in the utility passage in the direction of the diagnostic passage.In the context of a further embodiment of the invention, it is provided that the first connecting piece and / or the second connecting piece are designed in multiple pieces and each have a plug connector which is fluidically connected to the useful passage and a bearing connector which is fluidically connected to the diagnostic passage. If, in the context of this description, a connection piece is generally mentioned, the corresponding embodiments can always be transferred to the first connection piece, the second connection piece or both. If differences are present between the first connecting piece and the second connecting piece, reference is made to this.The connecting piece is preferably designed in multiple pieces and consists at least of the plug connector and the contact connector. The plug connector serves for the production of a plug connection of the connecting piece with the respective device, while a bearing connection can be produced by means of the bearing connector. The plug connection is understood to be a plug flow connection and the contact connection is understood to be a contact flow connection. In this respect, the flow connection of the utility passage to the respective utility connection is provided via the plug connection and the flow connection between the diagnostic passage and the diagnostic connection, in particular the first device, is provided via the contact connection.The plug connector is configured, for example, for insertion into the respective utility terminal or respective device, while the contact connector establishes the contact connection by planar contact with the device. On the side of the corresponding connecting piece facing away from the respective device, the hose line is preferably plugged onto the connecting piece. A plurality of lines can be provided for forming the useful passage and the diagnostic passage, for example a first line forming the useful passage and a second line forming the diagnostic passage. The first line is now fastened to the plug connector and the second line to the abutment connector, for example by plugging on. The plug connector and the contact connector are preferably formed in multiple pieces, i.e. are produced separately from one another. Alternatively, however, a one-piece embodiment can also be realized, in which the plug connector and the contact connector can also be materially uniform.A preferred embodiment of the invention provides that the plug connector can be inserted into a receiving opening of the device for establishing the flow connection between the service passage and the respective device, wherein the contact connector abuts a contact surface of the device when the plug connector is inserted. Both the first device and the second device thus each have such a receiving opening. The receiving opening is matched to the shape and dimension of the plug connector, so that a fluid-tight connection is produced by the plug connector being inserted into the receiving opening. The connecting piece is now configured or the contact connector is arranged with respect to the plug connector in such a way that after the insertion of the plug connector into the receiving opening for establishing the fluid-tight flow connection, the contact connector abuts against the contact surface of the device. As a result, for example, the diagnostic passage is closed.A further development of the invention provides that the diagnostic connection is formed on the contact surface of the first device. By the contact of the contact connector on the contact surface, the flow connection between the diagnostic passage and the diagnostic connection is thus established via the first connecting piece.A further embodiment of the invention provides that the contact surface of the second device blocks the diagnostic passage when the contact connector abuts the contact surface. In particular, no diagnostic connection is present in the contact surface of the second device, rather the contact surface is configured to block or seal the diagnostic passage.A preferred further embodiment of the invention provides that the useful passage is formed by a first line of the hose line which is plugged onto the plug connector or the plug connectors, and / or that the diagnostic passage is formed by a second line of the hose line which receives the first line and is plugged onto the contact connector. As already explained above, the hose line can be composed of a plurality of lines, namely the first line and the second line. The two lines are plugged onto the plug connector and the contact connector in a fluid-tight manner. The first line is also arranged in the second line, in which the diagnostic passage is present, so that the already mentioned configuration of the hose line is realized, according to which the diagnostic passage continuously surrounds the utility passage in the circumferential direction and extends over the complete longitudinal extent of the utility passage or of the hose line.Finally, within the scope of a further embodiment of the invention, it can be provided that the plug connector is fixed to the respective device by means of the contact connector. For example, the plug connector is only inserted into the receiving opening. In order to prevent the plug connector from slipping out of the receiving opening, the bearing connector is fastened to the respective device, for example screwed to it. The contact connector is now designed in such a way that it forces into the plug connector and holds it in the receiving opening. For example, the contact connector interacts with the plug connector in a form-fitting manner.The invention further relates to a method for operating a fluid line arrangement, in particular a fluid line arrangement according to the preceding embodiments, wherein the fluid line arrangement has a first fluid-conducting device, a second fluid-conducting device and a hose line connected to the first device and the second device for establishing a flow connection between the first device and the second device, wherein the hose line has a service passage which is fluidically connected to a service connection of the first device by means of a first connecting piece and to a service connection of the second device by means of a second connecting piece, wherein the first connecting piece is designed for establishing a flow connection between a diagnostic passage of the hose line which is separate from the service passage and a diagnostic connection of the first device which is separate from the service connection.It is provided that the second connecting piece, when it is arranged on the second device, establishes the flow connection between the service passage and the service connection of the second device and closes the diagnostic passage by interacting with the second device, wherein the pressure applied to the diagnostic connection is measured by means of a sensor.The advantages of such a configuration of the fluid line arrangement or such a procedure have already been pointed out. Both the fluid line arrangement and the method for operating the same can be further developed according to the above explanations, so that reference is made to these in this respect.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 drive device for a motor vehicle, which drive device has a fluid line arrangement, and FIG. 2 shows a schematic illustration of a region of the fluid line arrangement.FIG. 1 shows a schematic illustration of a drive device 1 for a motor vehicle. The drive device 1 has an internal combustion engine 2 with several cylinders 3. The intake pipe 4 is fluidically connected to a compressor 5 of an exhaust gas turbocharger 6. In addition to the compressor 5, the latter has a turbine 7, to which exhaust gas generated by the internal combustion engine 2 is fed. The turbine 7 uses enthalpy and / or flow energy contained in the exhaust gas to drive the compressor 5.In the flow connection between the compressor 5 and the intake pipe 4, for example, a charge air cooler 8 is provided. A throttle valve 9 likewise arranged in the flow connection between the compressor 5 and the intake pipe 4 serves for adjusting the fresh gas mass flow supplied to the internal combustion engine 2 or to the cylinders 3. The throttle valve 9 is connected, for example, via a throttle valve connection 10 to a fresh gas line 11 which, on the other hand, is fluidically connected to the charge air cooler 8 or the compressor 5. During operation of the drive device 1, the compressor 5 draws in fresh gas in the form of fresh air from an external environment of the drive device 1 via an air filter 12. This is in turn connected via an air filter adapter 13 to a fresh gas line 14, via which the flow connection between the air filter 12 and the compressor 5 is present.The drive device 1 has a fluid line arrangement 15, wherein a recirculation air valve device 16 arranged on the throttle body 10 represents a first fluid-conducting device of the fluid line arrangement 15 and the air filter 12 or, in the exemplary embodiment shown here, the air filter adapter 13 represents a second fluid-conducting device. The two fluid-conducting devices 16 and 13 are fluidically connected to one another via a hose line 17, wherein the hose line 17 is connected via a first connection piece 18 to the recirculation air valve device 16 and via a second connection piece 19 to the air filter adapter 13.In the hose line 17 there is a service passage 20 via which a service connection 21 of the recirculation air valve device 16 is in flow connection with a service connection 22 of the air filter adapter 13. With a corresponding setting of the recirculation air valve device 16, fresh gas present in the throttle valve connection 10 and already compressed by means of the compressor 5 can be returned in the direction of the air filter adapter 13 and therefore to a suction side of the compressor 5.In order to ensure that the hose line 17 is properly mounted, it has a diagnostic passage 23 separate from the useful passage 20. The first connecting piece 18 is now designed in such a way that it not only connects the useful passage 20 to the useful connection 21, but also the diagnostic passage 23 to a diagnostic connection 24 of the recirculation air valve device 16. After the connection of the hose line 17 to the recirculation air valve device 16 by means of the first connecting piece 18, the useful passage 20 is in flow connection with the useful connection 21 and the diagnostic passage 23 is in flow connection with the diagnostic connection 24 and therefore with the intake pipe 4.The second connecting piece 19 is, on the other hand, designed in such a way that, when it is arranged on the air filter adapter 13, it establishes the flow connection between the utility passage 20 and the utility connection 22, but closes the diagnostic passage 23. In this way, it can be easily determined whether the hose line 17 is correctly connected and / or whether a defect of the hose line 17 is present, in particular a leak.FIG. 2 shows a schematic sectional illustration of the hose line 17 and of the connecting pieces 18 and 19. In this respect, only the first connecting piece 18 is discussed below and with regard to the second connecting piece 19 reference is made to these explanations. It can be seen that the hose line 17 has a first line 26 and a second line 27, wherein the first line 26 is arranged in the second line 27. The useful passage 20 is formed in the first line 26, while the diagnostic passage 23 is present in the second line 27 outside the first line 26.The first line 26 is plugged onto a plug connector 28 of the first connecting piece 18. The plug connector 28 serves for establishing a plug connection to the recirculation air valve device 16. For this purpose, the plug connector 28 has a plug projection 29 which can be inserted into a receiving opening, not shown here, of the recirculation air valve device 16. Analogously, a plug projection 29 of the second connecting piece 19 can be introduced into a corresponding receiving opening of the air filter adapter 13.In addition to the plug connector 28, the connecting piece 18 has a contact connector 30. The second line 27 is plugged onto this. The system connector 30 has a flow channel 31 which is permanently in flow communication with the diagnostic passage 23. The flow channel 31 opens into a contact surface 32 of the contact connector 30. the contact surface 32 preferably has a seal receptacle 33, in which a seal 35 completely engaging around an opening opening 34 of the flow channel 31 is arranged.The contact connector 30 is configured such that when it is arranged on a contact surface, not shown here, of the respective device, i.e. of the recirculation air valve device 16 or of the air filter adapter 13, the contact surface 32 lies flush against a contact surface of the respective device. In the case of the recirculation air valve device 16, the diagnostic connection 24 is formed in this contact surface, so that the diagnostic passage 23 is in flow connection therewith. In contrast, the air filter adapter 13 or its contact surface is configured such that the mouth opening 34 and correspondingly the diagnostic passage 23 are closed off by the contact surface when the second connecting piece 19 abuts the air filter adapter 13.For example, it is provided that the contact connector 30 serves for fastening the plug connector 28 to the respective device 16 or 13. For this purpose, positive-locking elements 36 are provided on the plug connector 28 and the contact connector 30, by means of which elements the contact connector 30 forces the plug connector 28 in the direction of the receiving opening or into the latter, so that the plug connector 28 is held securely on the respective device 16 or 13.Preferably, a sensor, in particular a pressure sensor, is assigned to the diagnostic connection 24 or the line 25, by means of which sensor the pressure present at the diagnostic connection 24 can be measured. If this pressure deviates from a setpoint value, it can be concluded that there is a defect in the hose line 17 or that it is not properly mounted.

Claims

Fluid line arrangement (15), having a first fluid-conducting device (16), a second fluid-conducting device (13) and a hose line (17), which can be connected to the first device (16) and the second device (13), for producing a flow connection between the first device (16) and the second device (13), wherein the hose line (17) has a service passage (20), which can be connected in fluid communication with a service connection (21) of the first device (16) by means of a first connecting piece (18) and with a service connection (22) of the second device (13) by means of a second connecting piece (19), wherein the first connecting piece (18) is designed for producing a flow connection between a diagnostic passage (23) of the hose line (17), which diagnostic passage is separate from the service passage (20), and a diagnostic connection (24) of the first device (16), which diagnostic connection is separate from the service connection (21), characterized in that, the second connecting piece (19) is designed such that, when it is arranged on the second device (13), it establishes the flow connection between the service passage (20) and the service connection (22) of the second device (16) and closes the diagnostic passage (23) by interacting with the second device (13).Fluid line arrangement according to Claim 1, characterized in that the useful passage (20) and the diagnostic passage (23) are fluidically parallel.Fluid line arrangement according to one of the preceding claims, characterized in that the diagnostic passage (23) surrounds the useful passage (20) continuously in the circumferential direction.Fluid line arrangement according to one of the preceding claims, characterized in that the first connecting piece (18) and / or the second connecting piece (19) are of multipart design and each have a plug connector (28) which is fluidically connected to the useful passage (20) and a bearing connector (30) which is fluidically connected to the diagnostic passage (23).Fluid line arrangement according to Claim 4, characterized in that the plug connector (28) can be inserted into a receiving opening of the device (13, 16) in order to produce the flow connection between the service passage (20) and the respective device (13, 16), wherein, when the plug connector (28) is inserted, the bearing connector (30) bears against a contact surface of the device (13, 16).Fluid line arrangement according to Claim 5, characterized in that the diagnostic connection (24) is formed in the contact surface of the first device (16).Fluid line arrangement according to Claim 5 or 6, characterized in that the contact surface of the second device (13) blocks the diagnostic passage (23) when the bearing connector (30) bears against the contact surface.Fluid line arrangement according to one of Claims 4 to 7, characterized in that the useful passage (20) is formed by a first line (26) of the hose line (17) which is plugged onto the plug connector (28) or the plug connectors (28), and / or in that the diagnostic passage (23) is formed by a second line (27) of the hose line (17) which receives the first line (26) and is plugged onto the bearing connector (30).Fluid line arrangement according to one of Claims 4 to 8, characterized in that the plug connector (28) is fixed to the respective device (13, 16) by means of the bearing connector (30).Method for operating a fluid line arrangement (15), in particular a fluid line arrangement (15) according to one or more of the preceding claims, wherein the fluid line arrangement (15) has a first fluid-conducting device (16), a second fluid-conducting device (13) and a hose line (17) connected to the first device (16) and the second device (13) for establishing a flow connection between the first device (16) and the second device (13), wherein the hose line (17) has a service passage (20) which is fluidically connected to a service connection (21) of the first device (16) by means of a first connection piece (18) and to a service connection (22) of the second device (13) by means of a second connection piece (19), wherein the first connecting piece (18) is designed to establish a flow connection between a diagnostic passage (23) of the hose line (17) separate from the service passage (20) and a diagnostic connection (24) of the first device (16) separate from the service connection (21), characterized in that the second connecting piece (19), when it is arranged on the second device (13), establishes the flow connection between the service passage (20) and the service connection (22) of the second device (16) and closes the diagnostic passage (23) by interacting with the second device (13), wherein the pressure applied to the diagnostic connection (24) is measured by means of a sensor.

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