CONVEYOR UNIT FOR CONVEYING A LIQUID

Abstract

The invention relates to a conveyor unit for conveying a liquid, comprising a distributor block made of plastic for the liquid-conducting connection of at least one component for conveying the liquid, the distributor block comprising at least one metallic clamping element which encloses the distributor block at least in some regions on the outside.

Claims

1. A delivery unit for delivering a liquid, comprising: a distributor block; at least one component in fluid communication with the distributor block; and at least one metallic clamping element which engages around the outside of the distributor block; wherein the at least one component transfers liquid.

2. The delivery unit of claim 1, wherein the distributor block is made of plastic.

3. The delivery unit of claim 1, the distributor block further comprising: a main body; and at least two legs, the at least two legs being braced against one another by the at least one metallic clamping element; wherein the at least one component for delivering the liquid is a pump which is arranged between the two legs of the distributor block.

4. The delivery unit of claim 3, wherein the position of the main body and the at least two legs configures the distributor block to have a U-shaped form.

5. The delivery unit according to claim 3, further comprising a plurality of plug-in connections, wherein each of the at least two legs are connected to the main body by a corresponding one of the plurality of plug-in connections.

6. The delivery unit according to claim 3, further comprising a plurality of screw connections, wherein each of the at least two legs are connected to the main body by a corresponding one of the plurality of screw connections.

7. The delivery unit according to claim 1, the metallic clamping element further comprising a spring, wherein the spring permits a deformation of the distributor block if ice pressure is generated by freezing liquid in liquid-conducting ducts in the distributor block.

8. The delivery unit according to claim 1, the distributor block further comprising at least one receptacle for force-transmitting fixing of the at least one metallic clamping element.

9. The delivery unit according to claim 1, the delivery unit further comprising a housing, wherein the distributor block together with the at least one component are arranged in the housing.

10. The delivery unit according to claim 1, the at least one metallic clamping element further comprising a wire, the wire having at least one prestressed section.

11. A motor vehicle having an internal combustion engine, comprising: an exhaust-gas treatment device; an SCR catalytic converter for the purification of the exhaust gases of the internal combustion engine, the SCR catalytic converter being part of the exhaust-gas treatment device; and at least one delivery unit for delivering a liquid for exhaust-gas purification to the exhaust-gas treatment device.

12. The motor vehicle having an internal combustion engine of claim 11, the at least one delivery unit further comprising: a distributor block; at least one component in fluid communication with the distributor block; and at least one metallic clamping element which engages around the outside of the distributor block; wherein the at least one component transfers liquid to the exhaust-gas treatment device.

13. The motor vehicle having an internal combustion engine of claim 12, the distributor block further comprising: a main body; and at least two legs, the at least two legs being braced against one another by the at least one metallic clamping element; wherein the at least one component for delivering the liquid is a pump which is arranged between the two legs of the distributor block.

14. The motor vehicle having an internal combustion engine of claim 12, the metallic clamping element further comprising a spring, wherein the spring permits a deformation of the distributor block if ice pressure is generated by freezing liquid in liquid-conducting ducts in the distributor block.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The invention and the technical field will be explained in more detail below on the basis of the figures. In particular, it should be noted that the figures are merely schematic, and in particular, the proportions illustrated in the figures are merely schematic. The present invention will become more fully understood from the detailed description and the accompanying drawings, wherein:

[0034] FIG. 1 is a side view of a delivery unit, according to embodiments of the present invention;

[0035] FIG. 2 is a sectional view taken along lines A-A of FIG. 1; and

[0036] FIG. 3 is a diagram of a motor vehicle having a delivery unit, according to embodiments of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0037] The following description of the preferred embodiment(s) is merely exemplary in nature and is in no way intended to limit the invention, its application, or uses.

[0038] FIG. 1 shows a delivery unit 1 which is inserted into a tank 20 for a liquid. The delivery unit 1 has a housing 13 in which a distributor block 2 is situated. A pump 7 for delivering the liquid is fastened, as active component 3 of the delivery unit 1, to the distributor block 2. The pump 3 extracts liquid from the tank 20 at a suction point 23, and supplies the liquid at a supply port 22. The delivery unit 1 is inserted into a tank base 21 of the tank 20. The distributor block 2 of the delivery unit 1 is surrounded by a clamping element 4, the latter being in the form of a spring 8 and being manufactured from a wire 14 and having two prestressed sections 15. The prestressed sections 15 ensure that the clamping element 4 exerts a force on the distributor block 2 and thus braces the distributor block 2.

[0039] FIG. 2 shows the section A-A, already indicated in FIG. 1, through the delivery unit 1 shown in FIG. 1. Here, too, it is possible to see the housing 13 with the distributor block 2 arranged therein, on which distributor block the pump 7, as component 3, is situated. Also indicated at the pump 7 is a delivery direction 24 in which the liquid is delivered by the delivery unit 1 from the intake point 23 to the supply port 22. Also indicated is a duct 9 along which the liquid flows through the delivery unit 1. It may be seen that a low-pressure region is formed upstream of the pump as viewed along the delivery direction 24 of the duct 9, and a high-pressure region is formed downstream (that is to say behind the pump 7) as viewed in the delivery direction 24. Owing to the pressure increase generated by the pump 7, elevated liquid pressures prevail in the high-pressure region.

[0040] It is also possible to see the described clamping element 4, which is in the form of a spring 8 composed of wire 14 with prestressed sections 15 and which engages around the distributor block 2 at the outside. Here, the distributor block 2 is formed with a main body 5 and with two legs 6, wherein the left-hand leg 6 forms a low-pressure region of the duct 9 and is plugged onto the main body 5 by way of a plug-in connection, whereas the right-hand leg 6 forms a high-pressure region of the duct and is screwed to the main body 5 by way of a screw connection 11. In addition to the pump 7 as component 3, the illustration here also schematically shows two further components 3 in the upper region of the distributor block 2, which further components may for example be a valve or a sensor.

[0041] FIG. 3 shows a motor vehicle 16 having an internal combustion engine 17 and having an exhaust-gas treatment device 18 with an SCR catalytic converter 19. A liquid additive for exhaust-gas purification may be supplied to the exhaust-gas treatment device 18 by way of an injector 25, with liquid additive for exhaust-gas purification being supplied to the injector from a tank 20, via a line 26, by a delivery unit 1.

[0042] The description of the invention is merely exemplary in nature and, thus, variations that do not depart from the gist of the invention are intended to be within the scope of the invention. Such variations are not to be regarded as a departure from the spirit and scope of the invention.