Assembly for an urea tank system

Patent metadata

Field	Value
Publication number	US-11148522-B2
Application number	US-202016880378-A
Country	US
Kind code	B2
Filing date	May 21, 2020
Priority date	Jun 5, 2019
Publication date	Oct 19, 2021
Grant date	Oct 19, 2021

Abstract

Systems are provided for an assembly for a urea tank system. In one example, coaxial tubes including an inner tube and an outer tube are used to separate a urea passage from a gas passage. An angled tube, which extends from a urea tank to a portion of the outer tube downstream of a filler head relative to a direction of urea flow directs gases from the urea tank to the gas passage. This decreases a packaging size of the urea tank system.

First claim

The invention claimed is:

1. An assembly for a urea tank system, comprising:
a filler head comprising an opening with a plurality of grooves at a first end, the filler head further comprising an inner tubular portion and an outer tubular portion at a second end, wherein the inner tubular portion is fluidly coupled to the opening and the outer tubular portion is fluidly coupled to spaces between grooves of the plurality of grooves;
a coaxial tube comprising an inner tube spaced away from an outer tube, wherein an interior volume of the inner tube is fluidly coupled to the inner tubular portion of the second end, and wherein a gap between the inner tube and the outer tube is fluidly coupled to the outer tubular portion of the second end;
an adapter comprising a first tubular end comprising an adapter inner tubular portion and an adapter outer tubular portion arranged coaxially and spaced apart from one another, where the adapter inner tubular portion is connected to the inner tube of the coaxial tube and the adapter outer tubular portion is coupled to the outer tube of the coaxial tube;
an angled tube is fluidly coupled to a gap arranged between the adapter inner tubular portion and the adapter outer tubular portion, wherein the angled tube is fluidly coupled to a gas outlet of a urea tank; and
a urea inlet of the urea tank is fluidly coupled to an outlet of the adapter inner tubular portion.

2. The assembly according to claim 1 , wherein the inner tubular portion of the filler head is tapered or conical.

3. The assembly according of claim 1 , wherein the coaxial tube has a length of at least 30 cm.

4. The assembly of claim 1 , wherein the inner tube and the outer tube of the coaxial tube have constant diameters over their entire lengths.

5. The assembly of claim 1 , wherein a second diameter of the outer tubular portion of the filler head is at least 10 mm larger than a first diameter of the inner tubular portion of the filler head.

6. The assembly of claim 1 , wherein the angled tube is angled between 10 and 30 degrees relative to an axis of the adapter inner tubular portion and the adapter outer tubular portion.

7. A urea tank system, comprising:
a urea tank comprising a urea inlet and a gas outlet;
coaxial tubes comprising an inner tube and an outer tube, wherein a gas passage is arranged in a space between the inner tube and the outer tube; and
an adapter comprising a first tubular end comprising an inner tubular portion and an outer tubular portion, wherein the inner tube engages with the inner tubular portion and the outer tube engages with the outer tubular portion via, the adapter further comprising a second tubular end in fluid connection with the outer tubular portion and connectable to the gas outlet of the urea tank and the gas passage of the coaxial tubes between a plurality of grooves of the first tubular end and a third tubular end, wherein the third tubular end is in fluid connection with the urea inlet of the urea tank, and wherein the second tubular end is linear and angled relative to the first and third tubular ends.

8. The urea tank system of claim 7 , wherein the second tubular end is angled between 10 and 30 degrees relative to a shared axis of the first tubular end and the third tubular end.

9. The urea tank system of claim 7 , wherein the inner tube defines a urea passage, wherein the urea passage is fluidly coupled to the urea inlet.

10. The urea tank system of claim 7 , wherein a urea passage shaped via the inner tube and the third tubular end is fluidly separated from the gas passage.

11. The urea tank system of claim 7 , wherein a first end of a filler head comprises a portion of the plurality of grooves, wherein the gas passage is configured to direct gases to spaces between adjacent grooves of the plurality of grooves, and wherein a second end of the filler head comprises a conical tube configured to insert into the inner tube.

12. The urea tank system of claim 11 , wherein a filler nozzle extends into the filler head, wherein urea flows radially interior to the plurality of grooves.

13. A system, comprising:
a filler head comprising a plurality of grooves at a first end and a conical tube at a second end,
coaxial tubes including an inner tube and an outer tube, wherein the inner tube comprises a first diameter less than a second diameter of the outer tube, wherein the conical tube is at least partially inserted into the inner tube, and where a urea inlet of a urea tank is fluidly coupled to the inner tube; and
an adapter comprising a first tubular end comprising an inner tubular portion and an outer tubular portion, wherein the inner tube engages with the inner tubular portion and the outer tube engages with the outer tubular portion, the adapter further comprising a second tubular end shaped as an angled tube in fluid connection with the outer tubular portion and connectable to a gas outlet of the urea tank and a gas passage between the inner and outer tubes, an intersection between the gas passage and the second tubular end is positioned between a plurality of grooves of the first tubular end and a third tubular end, wherein the third tubular end is in fluid connection with the urea inlet of the urea tank, wherein the second tubular end is linear and angled relative to the first and third tubular ends.

14. The system of claim 13 , wherein a urea passage extends between the plurality of grooves and through the inner tube.

15. The system of claim 14 , wherein the inner tube blocks gas in the gas passage from mixing with urea in the urea passage.

16. The system of claim 13 , wherein the second tubular end extends to a portion of the inner tube downstream of the filler head relative to a direction of urea flow.

17. The system of claim 16 , wherein a lateral portion of the second tubular end is smaller than a longitudinal portion of the second tubular end.

18. The system of claim 13 , wherein the gas passage is fluidly coupled to spaces between adjacent grooves of the plurality of grooves.

19. The system of claim 13 , wherein the first diameter and the second diameter are uniform along an entirety of the inner tube and the outer tube.

20. The system of claim 13 , wherein the inner tube and the outer tube have a length of at least 60 cm.

Assignees

• Ford Global Tech Llc

Inventors

• Acar Alpaslan
• Kalp Mehmet
• Us OKAN
• Ergan Ahmet Kamil
• Ozdemir Bayram

Classifications

• B60K13/04 Primary

  concerning exhaust · CPC title

• F01N2610/1406

  Storage means for substances, e.g. tanks or reservoirs · CPC title

• B60K15/01

  Arrangement of fuel conduits · CPC title

• F01N3/2066 Primary

  Selective catalytic reduction [SCR] · CPC title

• B60K15/013

  of gas conduits · CPC title