Cooling element for injection valve

Patent metadata

Field	Value
Publication number	US-9745880-B2
Application number	US-201414898947-A
Country	US
Kind code	B2
Filing date	Apr 22, 2014
Priority date	Jun 20, 2013
Publication date	Aug 29, 2017
Grant date	Aug 29, 2017

Abstract

The invention relates to a cooling element ( 38; 40 ) for an injection valve ( 1; 41 ), in particular for injecting a liquid reduction agent into an exhaust train of a combustion engine, having a hollow region for receiving a section of the injection valve ( 1; 41 ) and a cooling plate ( 8 ) which is circumferential around the hollow region and a face plate ( 7 ) arranged on a face of the injection valve ( 1; 41 ) which has at least one injection opening ( 13 ), which enables the spraying of liquid out of the injection valve ( 1; 41 ) through the face plate ( 7 ). The face plate ( 7 ) has at least one bowl-shaped region ( 7 a ) formed having a front wall and at least one side wall which is designed to receive an injection-side section ( 1 a; 41 a ) of the injection valve ( 1; 41 ), and the cooling plate ( 8 ) and the face plate ( 7 ) are connected to each other in a liquid-tight manner such that, in a state in which a section of an injection valve ( 1; 41 ) is properly arranged in the hollow region, a cooling volume ( 36 ) circulating around the section of the injection valve ( 1; 41 ) is delimited by the face plate ( 7 ), the cooling plate ( 8 ) and the injection valve ( 1; 41 ).

First claim

What is claimed is:

1. A cooling element ( 38 ; 40 ) for an injection valve ( 1 ; 41 ), the cooling element comprising:
a hollow region for receiving at least one section ( 1 a , 1 b ; 41 a , 41 b ) of the injection valve ( 1 ; 41 );
a cooling plate ( 8 ), which runs around the hollow region; and
an end plate ( 7 ) which is arranged on an end side of the injection valve ( 1 ; 41 ),
wherein the end plate ( 7 ) has at least one region ( 7 a ), which is shaped in a bowl-like manner having an end wall ( 7 c ) that has at least one injection opening ( 13 ) that makes it possible to spray fluid out of the injection valve ( 1 ; 41 ) through the end plate ( 7 ),
wherein the end plate ( 7 ) further has at least one side wall ( 7 b ),
wherein the end plate ( 7 ) is configured for receiving an injection-side tip ( 1 a ; 41 a ) of the injection valve ( 1 ; 41 ) in a substantially positively locking manner into the bowl-like region ( 7 a ), and
wherein the cooling plate ( 8 ) and the end plate ( 7 ) are connected to one another in a fluid-tight manner, with the result that, in a state in which a section ( 1 a , 1 b ; 41 a , 41 b ) of an injection valve ( 1 ; 41 ) is arranged in the hollow region, a cooling volume ( 36 ), which runs around the section ( 1 a , 1 b ; 41 a , 41 b ) of the injection valve ( 1 ; 41 ), is delimited by the end plate ( 7 ), the cooling plate ( 8 ), and the injection valve ( 1 ; 41 ) such that a coolant in the cooling volume ( 36 ) contacts each of the end plate ( 7 ), the cooling plate ( 8 ), and the injection valve ( 1 ; 41 ).

2. The cooling element ( 38 ; 40 ) as claimed in claim 1 , the cooling plate ( 8 ) and the end plate ( 7 ) being connected to one another in a fluid-tight manner by way of welding.

3. The cooling element ( 38 ; 40 ) as claimed in claim 1 , which additionally has a connector piece ( 27 ) which is configured for receiving a rear end region ( 1 b ; 41 b ) of the injection valve ( 1 ; 41 ), which rear end region ( 1 b ; 41 b ) lies opposite the injection-side tip ( 1 a ; 41 a ).

4. The cooling element ( 38 ; 40 ) as claimed in claim 3 , the connector piece ( 27 ) having a feed line ( 27 a ) which is configured to feed fluid to be injected to the injection valve ( 1 ; 41 ).

5. The cooling element ( 38 ; 40 ) as claimed in claim 3 , at least one feed stub ( 9 a ) and one outlet stub ( 9 b ) being configured on the cooling plate ( 8 ), which feed stub ( 9 a ) and outlet stub ( 9 b ) makes it possible to conduct cooling fluid into and out of the cooling volume ( 36 ), respectively.

6. The cooling element ( 38 ; 40 ) as claimed in claim 5 , the connector piece ( 27 ) being configured to be mounted on the feed stub ( 9 a ) and outlet stub ( 9 b ).

7. An injection apparatus having a cooling element ( 38 ; 40 ) as claimed in claim 1 and having an injection valve ( 1 ; 41 ), an injection-side tip ( 1 a ; 41 a ) of the injection valve ( 1 ; 41 ) being arranged in the bowl-like region ( 7 a ) of the end plate ( 7 ).

8. The injection apparatus as claimed in claim 7 , the injection-side tip ( 1 a ; 41 a ) of the injection valve ( 1 ; 41 ) being connected to the bowl-like region ( 7 a ) in a fluid-tight manner by way of welding.

9. The injection valve ( 1 ) as claimed in claim 7 , at least one region ( 21 ) of the cooling plate ( 8 ) bearing against the injection valve ( 1 ), and the cooling volume ( 36 ) being sealed in a fluid-tight manner by way of at least one O-ring ( 17 ) which is arranged between the injection valve ( 1 ) and the region ( 21 ) of the cooling plate ( 8 ).

10. The injection valve ( 41 ) as claimed in claim 7 , the injection valve ( 41 ) having at least two metal sleeves ( 2 , 3 ) which are arranged coaxially with respect to one another and are connected to one another in a fluid-tight manner by way of welding.

11. The cooling element ( 38 ; 40 ) as claimed in claim 1 , the cooling plate ( 8 ) and the end plate ( 7 ) being connected to one another in a fluid-tight manner by laser welding.

12. The cooling element ( 38 ; 40 ) as claimed in claim 4 , at least one feed stub ( 9 a ) and one outlet stub ( 9 b ) being configured on the cooling plate ( 8 ), which feed stub ( 9 a ) and outlet stub ( 9 b ) makes it possible to conduct cooling fluid into and out of the cooling volume ( 36 ), respectively.

13. The cooling element ( 38 ; 40 ) as claimed in claim 12 , the connector piece ( 27 ) being configured in such a way that it is configured to be mounted on the feed stub ( 9 a ) and outlet stub ( 9 b ).

14. An injection apparatus having a cooling element ( 38 ; 40 ) as claimed in claim 1 and having an injection valve ( 1 ; 41 ) which is configured for injecting a fluid reducing agent into an exhaust gas section of an internal combustion engine, an injection-side tip ( 1 a ; 41 a ) of the injection valve ( 1 ; 41 ) being arranged in the bowl-like region ( 7 a ) of the end plate ( 7 ).

15. The injection apparatus as claimed in claim 14 , the injection-side tip ( 1 a ; 41 a ) of the injection valve ( 1 ; 41 ) being connected to the bowl-like region ( 7 a ) in a fluid-tight manner by way of laser welding.

16. The injection valve ( 1 ) as claimed in claim 14 , at least one region ( 21 ) of the cooling plate ( 8 ) bearing against the injection valve ( 1 ), and the cooling volume ( 36 ) being sealed in a fluid-tight manner by way of at least one O-ring ( 17 ) which is arranged between the injection valve ( 1 ) and the region ( 21 ) of the cooling plate ( 8 ).

17. The injection valve ( 41 ) as claimed in claim 14 , the injection valve ( 41 ) having at least two metal sleeves ( 2 , 3 ) which are arranged coaxially with respect to one another and are connected to one another in a fluid-tight manner by way of laser welding.

18. The cooling element ( 38 ; 40 ) as claimed in claim 1 , at least one feed stub ( 9 a ) and one outlet stub ( 9 b ) being configured on the cooling plate ( 8 ), which feed stub ( 9 a ) and outlet stub ( 9 b ) makes it possible to conduct cooling fluid into and out of the cooling volume ( 36 ), respectively.

Assignees

• Bosch Gmbh Robert

Inventors

• Haeberer Rainer

Classifications

• Y02T10/12

  Improving ICE efficiencies · CPC title

• F01N2260/024

  using a liquid · CPC title

• F01N2610/11

  the substance or part of the dosing system being cooled · CPC title

• F02M53/043

  with cooling means other than air cooling · CPC title

• F01N3/2066 Primary

  Selective catalytic reduction [SCR] · CPC title