Injection valve

• US 6,616,066 B2
• Filed: 01/29/2001
• Issued: 09/09/2003
• Est. Priority Date: 01/29/2000
• Status: Expired due to Fees

• Current Assignee: Daimler AG (Mercedes-Benz Group AG)
• Original Assignee: Daimler Chrysler Company LLC (Stellantis NV)
• Inventors: Kroetz, Gerhard, Matt, Martin, Pfeffer, Viktor, Holder, Eberhard, Guettler, Herbert
• Primary Examiner(s): Michalsky, Gerald A.
• Application Number:
  US09/770,293
• Publication Number:
  US 20010029980A1
• Time in Patent Office: 953 Days
• Field of Search: 123/549, 137/341, 239/135
• US Class Current: 239/135
• CPC Class Codes: F02M 31/125 Fuel
• CPC Class Codes: F02M 37/30 characterised by heating means
• CPC Class Codes: F02M 37/48 Filters structurally associated with fuel valves
• CPC Class Codes: F02M 53/06 with fuel-heating means, e.g. for vaporising
• CPC Class Codes: F02M 61/165 Filtering elements specially adapted in fuel inlets to injector
• CPC Class Codes: Y02T 10/12 Improving ICE efficiencies
• CPC Class Codes: Y10T 137/6606 With electric heating element
• CPC Class Codes: Y10T 137/794 With means for separating solid material from the fluid

Abstract

An injection valve for internal combustion engines has a filter element arranged on the inside of the injection valve in the fuel flow of the latter with ducts for the fuel. The filter element is designed as a throughflow heating element, for which purposes the walls of the throughflow ducts are capable of being heated, at least in certain regions, along their longitudinal extent.

Claims

1. Injection valve for internal combustion engines, comprising a filter element arranged inside the injection valve in fuel flow the filter element including an upstream surface, a downstream surface, longitudinal duets extending between the upstream surface and the downstream surface for the fuel flow and a heating element, wherein regions of walls of the ducts are capable of being heated along longitudinal extent of the walls.

2. Injection valve according to claim 1, wherein the filter element is largely manufactured, at least in a vicinity of fuel flowing through, from a semiconducting material which has conductive aluminum metal on certain regions.

3. Injection valve according to claim 1, further comprising a perforated stabilizing plate, through which the fuel can flow and which is made from metal and is arranged on an outflow side of the filter element.

4. Injection valve according to claim 1, wherein the ducts have a diameter of between 10 μ

m and 1000 μ

m.

5. Injection valve according to claim 1, wherein the ducts have a diameter of between 20 μ

m and 500 μ

m.

6. Injection valve according to claim 1, wherein the ducts have a diameter of between 20 μ

m and 200 μ

m.

7. Injection valve according to claim 1, further comprising a web between two adjacent ducts, wherein the web has a wall thickness between 10 μ

m and 200 μ

m.

8. Injection valve according to claim 1, further comprising a web between two adjacent ducts, wherein the web has a wall thickness between 20 μ

m and 100 μ

m.

9. Injection valve according to claim 1, wherein a length of the ducts is between 10 μ

m and 1000 μ

m.

10. Injection valve according to claim 1, wherein a length of the ducts is between 50 μ

m and 500 μ

m.

11. Injection valve according to claim 1, wherein a length of the ducts is between 100 μ

m and 300 μ

m.

12. Injection valve according to claim 1, wherein the filter element has a plurality of semiconductor boards arranged one behind the other and provided with ducts.

13. Injection valve according to claim 1, wherein the filter element is thermally insulated in relation to the housing of the injection valve.

14. Injection valve for internal combustion engines, comprising a filter element arranged inside the injection valve in fuel flow, the filter element including ducts for the fuel flow and a heating element, wherein regions of walls of the ducts are capable of being heated along longitudinal extent of the walls, and wherein the filter element has a semiconducting material at least in a vicinity of the fuel flow.

15. Injection valve according to claim 14, wherein the semiconducting material includes silicon at least in the vicinity of the fuel flow.

16. Injection valve according to claim 14, wherein the semiconducting material includes a conductive aluminium metal.

17. Injection valve according to claim 14, further comprising a perforated stabilizing plate, through which the fuel can flow and which is made from metal and is arranged on an outflow side of the filter element.

18. Injection valve according to claim 14, wherein the ducts have a diameter of between 10 μ

m and 1000 μ

m.

19. Injection valve according to claim 14, wherein the ducts have a diameter of between 20 μ

m and 500 μ

m.

20. Injection valve according to claim 14, wherein the ducts have a diameter of between 20 μ

m and 200 μ

m.

21. Injection valve according to claim 14, further comprising a web between two adjacent ducts, wherein the web has a wall thickness between 10 μ

m and 200 μ

m.

22. Injection valve according to claim 14, further comprising a web between two adjacent ducts, wherein the web has a wall thickness between 20 μ

m and 100 μ

m.

23. Injection valve according to claim 14, wherein a length of the ducts is between 10 μ

m and 1000 μ

m.

24. Injection valve according to claim 14, wherein a length of the ducts is between 50 μ

m and 500 μ

m.

25. Injection valve according to claim 14, wherein a length of the ducts is between 100 μ

m and 300 μ

m.

26. Injection valve according to claim 14, wherein the filter element has a plurality of semiconductor boards arranged one behind the other and provided with ducts.

27. Injection valve according to claim 14, wherein the filter element is thermally insulated in relation to a housing of the injection valve.