High-pressure fuel pump including a discharge valve with a valve ball and a valve body

Patent metadata

Field	Value
Publication number	US-10167834-B2
Application number	US-201515323337-A
Country	US
Kind code	B2
Filing date	Feb 20, 2015
Priority date	Apr 15, 2014
Publication date	Jan 1, 2019
Grant date	Jan 1, 2019

Abstract

A high-pressure fuel pump which includes a discharge valve with a valve ball and a valve body, the valve body having a sealing section on which a sealing seat is present, and having a guide section in which the valve ball is guided. The guide section includes a first plurality of axially protruding webs between which first flow paths are formed, an opening which faces radially outwardly being present at least between two adjacent webs.

First claim

What is claimed is:

1. A high-pressure fuel pump, comprising:
a discharge valve that includes:
a valve ball; and
a valve body that includes:
a sealing section on which a sealing seat is present, and
a guide section in which the valve ball is guided;

wherein:
the guide section includes a plurality of axially protruding webs between which first flow paths are formed; and
an opening, which faces radially outwardly, is present between two adjacent ones of the webs.

2. The high-pressure fuel pump as recited in claim 1 , wherein the webs protrude freely from the sealing section.

3. The high-pressure fuel pump as recited in claim 1 , wherein the webs have a circular segment-like cross section.

4. The high-pressure fuel pump as recited in claim 1 , wherein an outer diameter of the valve body is smaller in an area of the guide section than in an area of the sealing section.

5. The high-pressure fuel pump as recited in claim 1 , wherein:
the discharge valve includes a stop element for the valve ball;
the stop element includes:
a stop section which delimits an opening stroke of the valve ball, and
a plurality of radial recesses which are uniformly distributed in a circumferential direction and which form second flow paths; and

the second flow paths are designed such that, regardless of a radial orientation of the stop element, at least one of the second flow paths at least partially overlaps a first one of the flow paths.

6. The high-pressure fuel pump as recited in claim 5 , wherein the at least one of the second flow paths at least partially overlaps a first one of the flow paths regardless of the radial orientation of the stop element due to a design of a cross-sectional area of the at least one of the second flow paths.

7. The high-pressure fuel pump as recited in claim 5 , further comprising a valve spring supported on the stop element.

8. The high-pressure fuel pump as recited in claim 7 , wherein the valve spring is designed as a coil spring whose diameter varies in an axial direction.

9. The high-pressure fuel pump as recited in claim 5 , wherein the stop element is manufactured according to a metal injection molding (MIM) process.

10. The high-pressure fuel pump as recited in claim 5 , wherein the first flow paths are formed by recesses and there are a different number of the recesses forming the first flow paths than of the recesses forming the second flow paths.

11. The high-pressure fuel pump as recited in claim 1 , wherein the valve body is manufactured according to a metal injection molding (MIM) process.

12. The high-pressure fuel pump as recited in claim 5 , wherein the stop element is designed as a stamped part.

13. The high-pressure fuel pump as recited in claim 5 , wherein the stop element is designed as a deep-drawn part.

14. The high-pressure fuel pump as recited in claim 5 , wherein the sealing section and the guiding section are integrally formed.

Assignees

• Bosch Gmbh Robert

Inventors

• Teike Gerd
• Kleindl Michael
• Peissner Sebastian
• Stritzel Soeren

Classifications

• F02M59/462 Primary

  Delivery valves · 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

• F02M63/0036

  with spherical or partly spherical shaped valve member ends · CPC title