Motor vehicle fluid line

Abstract

A motor vehicle fluid line for conducting at least one fluid medium, in particular for conducting urea solutions for SCR catalytic converter systems, at least one fluid-carrying pipe and at least one fluid-carrying connector that is connected to the pipe being provided. The pipe comprises a fluid-carrying outer line and a fluid-carrying inner line that is received in the outer line over at least part of its length L. The connector comprises a first connecting branch that is in fluid communication with the outer line, and comprises a second connecting branch that is in fluid communication with the inner line.

Claims

1. A motor vehicle fluid line for conducting at least one fluid medium, wherein at least one fluid-carrying pipe and at least one fluid-carrying connector connected to the pipe are provided, wherein the pipe comprises, over at least part of its length L, a fluid-carrying outer line and a fluid-carrying inner line that is received in the outer line and extends along the outer line, wherein the outer line includes at least one heating element, wherein the at least one heating element is in the form of at least one of a heating wire and a planar heating element, and wherein the connector comprises a first connecting branch that is in fluid communication with the outer line, and a second connecting branch that is in fluid communication with the inner line.

2. The motor vehicle fluid line according to claim 1, wherein the pipe is directly connected to the fluid-carrying connector.

3. The motor vehicle fluid line according to claim 1, wherein at least one of the outer line and the inner line are material bonded to the connector.

4. The motor vehicle fluid line according to claim 3, wherein at least one of the outer line and the inner line are connected to the connector by means of at least one of a spin welded connection and a laser welded connection.

5. The motor vehicle fluid line according to claim 1, wherein the outer line is arranged substantially in parallel with the inner line.

6. The motor vehicle fluid line according to claim 1, wherein the outer line and the inner line are arranged substantially coaxially with one another.

7. The motor vehicle fluid line according to claim 1, wherein the pipe is merely formed as a single fluid duct over part of its length L and wherein the pipe is in the form of the outer line and the inner line over another part of its length L.

8. The motor vehicle fluid line according to claim 1, wherein the fluid medium flows or can flow through the outer line and the inner line in the same direction.

9. The motor vehicle fluid line according to claim 1, wherein the pipe is formed such that at least part of its length L is heated.

10. The motor vehicle fluid line according to claim 1, wherein the pipe is surrounded by a protective pipe.

11. The motor vehicle fluid line according to claim 1, wherein the connector comprises at least two parallel or substantially parallel fluid ducts, which fluid ducts are each connected to a connecting branch of the connector.

12. The motor vehicle fluid line according to claim 1, wherein a metering device for a metered supply of the fluid medium is provided on each connecting branch of the connector.

13. A method for producing a motor vehicle fluid line according to claim 1, wherein a connector is material bonded to an inner line, wherein the unit consisting of the connector and the inner line is then connected to an outer line, in which the inner line is introduced or inserted into the outer line and the outer line is then bonded to the connector, wherein the outer line comprises the at least one heating element and is surrounded by the at least one heating element, wherein the at least one heating element is formed as a heating wire.

14. The motor vehicle fluid line according to claim 1, wherein the heating element surrounds the outer line.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) The present disclosure will be described in more detail in the following on the basis of the drawings that show just one embodiment, in which:

(2) FIG. 1 is a schematic sectional side view of the motor vehicle fluid line according to the present disclosure, and

(3) FIG. 2 schematically shows a section A-A through the subject matter of FIG. 1.

DETAILED DESCRIPTION

(4) The figures show a motor vehicle fluid line according to the present disclosure for conducting at least one fluid medium and preferably for conducting a urea solution for an SCR catalytic converter system. In the embodiment, the fluid line according to the present disclosure comprises a fluid-carrying pipe 1 and a fluid-carrying connector 2 that is connected to said pipe 1. Preferably and in the embodiment, a connector 2′ or a second connector 2′ is also connected to the other end of the pipe 1.

(5) The pipe 1 comprises a fluid-carrying outer line 3 and a fluid-carrying inner line 4 that is received in the outer line 3 and extends along the outer line 3 over part L1 of its length L. Expediently and in the embodiment, the outer line 3 is arranged in parallel with the inner line 4 and the outer line 3 and the inner line 4 are preferably arranged coaxially with one another. According to a preferred embodiment and in the embodiment, the pipe 1 is merely in the form of a single fluid duct 11 over a second part L2 of its length L. In this case, the pipe wall of the pipe 1 therefore only surrounds a fluid duct 11 that is not subdivided.

(6) In the embodiment, a fluid medium—preferably urea solution—flows through the outer line 3 and the inner line 4 in the same direction. This direction of flow has been shown in FIG. 1 by arrows in both the outer line 3 and in the inner line 4. The fluid medium or the urea solution therefore flows towards the connector 2.

(7) According to a preferred embodiment and in the embodiment, the pipe 1 is directly connected to the fluid-carrying connector 2 and is preferably and in the embodiment bonded to the connector 2. In this case, according to recommendation and in the embodiment, both the outer line 3 and the inner line are bonded to the connector 2. The outer line 3 and the inner line 4 are preferably connected to the connector 2 by means of a spin welding connection or a laser welding connection.

(8) According to a very preferred embodiment and in the embodiment, the pipe 1 is formed so as to be heated. In this case, according to recommendation and in the embodiment, the outer line 3 is surrounded by an electrically heatable heating wire 8. Only the outer line 3 is therefore provided with a heating means or with a heating wire 8, and, within the context of the present disclosure, as a result of heating said pipe, the temperature of the fluid medium in the inner line 4 can also be sufficiently controlled. Expediently and in the embodiment, the pipe 1 is surrounded by a protective pipe 7, this protective pipe 7 being formed as a corrugated pipe according to recommendation and in the embodiment.

(9) It can be seen in FIG. 1 in particular that the connector 2 comprises two parallel fluid ducts 9, 10, which preferably and in the embodiment form a linear extension of the outer line 3 and the inner line 4. In this case, the inner fluid duct 9 corresponds to a linear extension of the inner line 4 and the outer fluid duct 10 corresponds to a linear extension of the outer line 3, the outer fluid duct 4 surrounding the inner fluid duct 9 of the connector 2. Preferably and in the embodiment, the two fluid ducts 9, 10 of the connector 2 are arranged coaxially with one another. Each of the two fluid ducts 9, 10 are preferably and in the embodiment connected to a connecting branch 5, 6 of the connector 2. In this case in the embodiment, one connecting branch 6 is arranged transversely or perpendicularly to the longitudinal axis of the pipe 1 or to the longitudinal axis of the connector 2. This connecting branch 6 is expediently and in the embodiment connected to the outer fluid duct 10. A further connecting branch 5 forms a linear extension of the inner line 4 and of the inner fluid duct 9.

(10) According to a preferred embodiment, the two connecting branches 5, 6 of the connector 2 are each connected to a metering device (not shown in the figures) for supplying the fluid medium in a metered fashion. In this case, this is expediently a metering device for an SCR catalytic converter system. The metering devices are preferably arranged at different points of the SCR catalytic converter system or the associated motor vehicle.