Electromagnetically actuatable intake valve for a high-pressure pump, and high-pressure pump

Patent metadata

Field	Value
Publication number	US-10634104-B2
Application number	US-201615775059-A
Country	US
Kind code	B2
Filing date	Sep 22, 2016
Priority date	Nov 10, 2015
Publication date	Apr 28, 2020
Grant date	Apr 28, 2020

Abstract

The invention relates to an electromagnetically actuatable intake valve for a high-pressure pump of a fuel injection system, in particular a common rail injection system, comprising a magnet coil (1) for acting on an armature (2) which is received and guided such that it can be moved with a reciprocating movement in a central recess (3) of a valve body (4), wherein a pole core (6) which is connected via a sleeve (7) to the valve body (4) lies opposite the armature (2) at a working air gap (5). According to the invention, the valve body (4) has a circumferential cut-out (9) within an inner circumferential surface (8) which delimits the recess (3), which cut-out (9) divides the inner circumferential surface (8) into an upper and a lower guide region (10, 11). The invention also relates to a high-pressure pump for a fuel injection system, in particular a common rail injection system, comprising said type of intake valve.

First claim

The invention claimed is:

1. An electromagnetically actuable suction valve for a high pressure pump of a fuel injection system, comprising a magnet coil ( 1 ) for acting on an armature ( 2 ) which is received and guided such that the armature can be moved with a reciprocating movement in a central recess ( 3 ) of a valve body ( 4 ), and a pole core ( 6 ) which is connected via a sleeve ( 7 ) to the valve body ( 4 ) lying opposite the armature ( 2 ) at a working air gap ( 5 ), characterized in that the valve body ( 4 ) has a circumferential cutout ( 9 ) within an inner circumferential face ( 8 ) which delimits the recess ( 3 ), wherein the cutout ( 9 ) divides the inner circumferential face ( 8 ) into an upper guide region and a lower guide region ( 10 , 11 ), wherein the sleeve ( 7 ) is welded to the valve body ( 4 ) in a region of the circumferential cutout ( 9 ).

2. The suction valve as claimed in claim 1 , characterized in that the sleeve ( 7 ) is welded to the valve body ( 4 ) at a level of the circumferential cutout ( 9 ) such that a resulting weld seam between the sleeve ( 7 ) and the valve body ( 4 ) has no influence on the upper guide region ( 10 ) or the lower guide region ( 11 ) of the circumferential face ( 8 ).

3. The suction valve as claimed in claim 1 , characterized in that the circumferential cutout ( 9 ) is configured as an annular groove, a cross-sectional dimension of which is greater in an axial direction than in a radial direction.

4. The suction valve as claimed in claim 1 , characterized in that the circumferential cutout ( 9 ) has a rectangular cross section.

5. The suction valve as claimed in claim 1 , characterized in that the circumferential cutout ( 9 ) merges via rounded or beveled edges ( 12 ) into the inner circumferential face ( 8 ).

6. The suction valve as claimed in claim 1 , characterized in that the circumferential cutout ( 9 ) is arranged centrally in relation to an armature movement space which is delimited by an upper stroke stop and a lower stroke stop ( 13 , 14 ) for the armature ( 2 ).

7. The suction valve as claimed in claim 6 , characterized in that the upper stroke stop ( 13 ) is formed by the pole core ( 6 ), and the lower stroke stop ( 14 ) is formed by an annular shoulder ( 15 ) of the valve body ( 4 ) or an annular stop element ( 16 ) which is supported on the valve body.

8. The suction valve as claimed in claim 1 , characterized in that the armature ( 2 ) is penetrated by at least one equalizing bore ( 17 ).

9. The suction valve as claimed in claim 1 , characterized in that the armature ( 2 ) comprises a contact pin ( 18 ) for making contact with a valve tappet ( 19 ) of the suction valve.

10. A high pressure pump for a fuel injection system, having a suction valve as claimed in claim 1 and a cylinder head ( 20 ).

11. The high pressure pump as claimed in claim 10 , wherein the suction valve is integrated into the cylinder head.

12. The high pressure pump as claimed in claim 10 , characterized in that the sleeve ( 7 ) is welded to the valve body ( 4 ) at a level of the circumferential cutout ( 9 ).

13. The high pressure pump as claimed in claim 10 , characterized in that the circumferential cutout ( 9 ) is configured as an annular groove, a cross-sectional dimension of which is greater in an axial direction than in a radial direction.

14. The high pressure pump as claimed in claim 10 , characterized in that the circumferential cutout ( 9 ) has a rectangular cross section.

15. The high pressure pump as claimed in claim 10 , characterized in that the circumferential cutout ( 9 ) merges via rounded or beveled edges ( 12 ) into the inner circumferential face ( 8 ).

16. The high pressure pump as claimed in claim 10 , characterized in that the circumferential cutout ( 9 ) is arranged centrally in relation to an armature movement space which is delimited by an upper stroke stop and a lower stroke stop ( 13 , 14 ) for the armature ( 2 ).

17. The high pressure pump as claimed in claim 16 , characterized in that the upper stroke stop ( 13 ) is formed by the pole core ( 6 ), and the lower stroke stop ( 14 ) is formed by an annular shoulder ( 15 ) of the valve body ( 4 ) or an annular stop element ( 16 ) which is supported on the valve body.

18. The high pressure pump as claimed in claim 10 , characterized in that the armature ( 2 ) is penetrated by at least one equalizing bore ( 17 ).

19. The high pressure pump as claimed in claim 10 , characterized in that the armature ( 2 ) comprises a contact pin ( 18 ) for making contact with a valve tappet ( 19 ) of the suction valve.

Assignees

• Bosch Gmbh Robert

Inventors

• Cichon Gabriel

Classifications

• F16K31/0675

  Electromagnet aspects, e.g. electric supply therefor · CPC title

• F02M63/0071

  characterised by guiding or centering means in valves including the absence of any guiding means, e.g. "flying arrangements" · CPC title

• F02M59/466 Primary

  Electrically operated valves, e.g. using electromagnetic or piezoelectric operating means · CPC title

• F02M59/367

  Pump inlet valves of the check valve type being open when actuated · CPC title

• F02M2200/03

  Fuel-injection apparatus having means for reducing or avoiding stress, e.g. the stress caused by mechanical force, by fluid pressure or by temperature variations · CPC title