Device for supplying fluid media at low temperatures

Patent metadata

Field	Value
Publication number	US-9708948-B2
Application number	US-52028907-A
Country	US
Kind code	B2
Filing date	Oct 22, 2007
Priority date	Dec 20, 2006
Publication date	Jul 18, 2017
Grant date	Jul 18, 2017

Abstract

A device for transporting a fluid medium to a metering module for metering a liquid reducing agent into an exhaust gas system in order to reduce pollutants in an exhaust gas. The device has at least one heated transport line and at least one system component with a heated internal region. The transport line has a line connecting piece, and the system component has a module connecting piece that is directly or indirectly coupled to the line connecting piece. The device includes at least one heat conducting sleeve that can be inserted in the line connecting piece and the module connecting piece. The heat conducting sleeve is thermally coupled to the heated transport line and/or the heated internal region in order to transmit heat.

First claim

What is claimed is:

1. A device for supplying a fluid medium for metering a liquid reducing agent into an exhaust system for reducing pollutants in an exhaust gas, the device comprising:
at least one supply line having a first heater and a line connection piece, wherein the line connection piece includes a male or a female mating component;
at least one system component with an internal region having a second heater to heat the internal region; and
at least one heat-conducting sleeve,
wherein the at least one system component has a module connection piece having a male or a female mating component, wherein the male or female mating component of the module connection piece is coupled directly to the respective female or male mating component of the line connection piece to form an interface;
wherein the at least one heat-conducting sleeve extends through the interface into the line connection piece and the module connection piece,
wherein the heat-conducting sleeve is thermally coupled to the first heater and to the second heater for transmitting heat to the interface, and
wherein the sleeve provides a fluid connection between the at least one supply line and the internal region of the at least one system component.

2. The device as defined by claim 1 , wherein the heat-conducting sleeve establishes a fluidic communication of the supply line and the internal region.

3. The device as defined by claim 2 , wherein the heat-conducting sleeve has a cylindrical sleeve.

4. A system for metering a liquid reducing agent into an exhaust system for reducing nitrogen oxides in an exhaust gas, including at least one metering module, and at least one device as defined by claim 2 .

5. The device as defined by claim 1 , wherein the heat-conducting sleeve has a cylindrical sleeve.

6. A system for metering a liquid reducing agent into an exhaust system for reducing nitrogen oxides in an exhaust gas, including at least one metering module, and at least one device as defined by claim 5 .

7. The device as defined by claim 1 , wherein the heat-conducting sleeve is a component of at least one of the following elements: the line connection piece and the module connection piece.

8. The device as defined by claim 1 , wherein one of the line connection piece and the module connection piece is embodied without its own heating.

9. The device as defined by claim 1 , wherein the line connection piece and/or the module connection piece is insulated thermally by sheathing including insulating material with a thermal conductivity of less than 0.1 W/(m*K).

10. A system for metering a liquid reducing agent into an exhaust system for reducing nitrogen oxides in an exhaust gas, including at least one metering module, and at least one device as defined by claim 9 .

11. The device as defined by claim 9 , wherein insulating material has a thermal conductivity of less than 0.06 W/(m*K).

12. The device as defined by claim 9 , wherein the line connection piece and/or the module connection piece is insulated thermally by complete or partial sheathing which includes an insulating material.

13. The device as defined by claim 1 , wherein the heat-conducting sleeve includes a material having a thermal conductivity of more than 100 W/(m*K).

14. The device as defined by claim 1 , wherein the heat-conducting sleeve includes at least one of the following materials: metal, graphite and a thermally conductive plastic.

15. The device as defined by claim 14 , wherein the metal is one or more of the metals copper, aluminum, brass, zinc, silver, gold, magnesium and tungsten.

16. The device as defined by claim 14 , wherein the thermally conductive plastic is a plastic filled with graphite particles or with metal particles.

17. A system for metering a liquid reducing agent into an exhaust system for reducing nitrogen oxides in an exhaust gas, including at least one metering module, and at least one device as defined by claim 1 .

18. The device as defined by claim 1 , wherein the heat-conducting sleeve is embodied as a tube that is press fit into the supply line.

19. The device as defined by claim 1 , wherein the heat conducting sleeve extends axially from the first heater to the second heater.

20. The device as defined by claim 1 , wherein the heaters are disposed at opposite ends of the heat conducting sleeve.

21. The device as defined by claim 1 , wherein one end of the heat conducting sleeve is surrounded by the first heater and an opposite end of the heat conductive sleeve is surrounded by the second heater.

22. The device as defined by claim 1 , wherein the system component is a supply module and the second heater is inside the supply module.

23. The device as defined by claim 1 , wherein the at least one system component includes at least one of the following elements: a supply module; a working container; and a further supply line.

24. The device as defined by claim 1 , wherein the heat-conducting sleeve is threadless.

25. The device as defined by claim 1 , wherein the first heater and the second heater are separated by a gap, and wherein portions of both the first heater and the second heater extend around the heat-conducting sleeve.

Assignees

• Haeberer Rainer
• Horn Matthias
• Bosch Gmbh Robert

Inventors

• Haeberer Rainer
• Horn Matthias

Classifications

• Y02T10/12

  Improving ICE efficiencies · CPC title

• Y10T137/6416

  With heating or cooling of the system · CPC title

• Y10T137/6606

  With electric heating element · CPC title

• F16L53/008

  Mechanical Engineering · mapped topic

• F01N3/2066 Primary

  Selective catalytic reduction [SCR] · CPC title