Component having high-pressure bores that lead into one another

Abstract

In a component (1), in particular a housing of a high-pressure fuel pump, in which at least one first high-pressure channel (4) and one second high-pressure channel (5) are present, the longitudinal axis of the first channel (4) is at an acute or right angle to the longitudinal axis of the second channel (5), wherein the second channel (5) leads into the first channel (4), such that an intersection is formed. The first channel (4) is formed by a central bore (10) and at least one secondary bore (11) that enlarges the cross-section of the central bore (10), wherein the longitudinal axis of the secondary bore (11) and the longitudinal axis of the central bore (10) extend parallel to one another. The central bore (10) passes through ugh the component (1) and consists of a first segment (8) extending over the intersection and a second segment (9) connected to the first segment, wherein the at least one secondary bore (11) extends only along the first segment (8) and no secondary bore is provided along the second segment (9).

Claims

1. A component comprising a first high-pressure channel and at least one second high-pressure channel, a longitudinal axis of the first channel being at an acute or right angle to a longitudinal axis of the second channel and the second channel leading into the first channel, such that an intersection is formed, wherein the first channel is formed by a central bore and at least one secondary bore that enlarges a cross-section of the central bore, a longitudinal axis of the secondary bore and a longitudinal axis of the central bore extending parallel to one another, characterized in that the central bore (10) passes through the component (1) and consists of a first segment (8) extending over the intersection and a second segment (9) connected to the first segment, and in that the at least one secondary bore (11) extends only along the first segment (8) and no secondary bore is provided along the second segment (9).

2. The component according to claim 1, characterized in that respectively one secondary bore (11) that enlarges the cross-section of the central bore (10) is formed on both sides of the central bore (10).

3. The component according to claim 2, characterized in that longitudinal axes of the central bore (10) and two secondary bores (11) lie in a common plane.

4. The component according to claim 1, characterized in that the at least one secondary bore (11) has the same bore diameter as the central bore (10).

5. The component according to claim 1, characterized in that the at least one secondary bore (11) has a smaller bore diameter than the central bore (10).

6. The component according to claim 1, characterized in that a cross-sectional area of the first segment of the first channel (4) is greater than a cross-sectional area of the second channel (5).

7. The component according to claim 1, characterized in that a cross-sectional area of the second channel (5) substantially corresponds to a cross-sectional area of the central bore (10) of the first channel (4).

8. The component according to claim 1, characterized in that a bore end (12) of the at least one secondary bore (11) is spherically shaped.

9. The component according to claim 1, characterized in that the central bore (10) has a high-pressure connection (2), which comprises an outwardly diverging, conical sealing surface (3), at an end of the second segment (9).

10. The component according to claim 1, characterized in that the first channel (4) is a collector bore of a high-pressure piston pump.

11. The component according to claim 1, characterized in that a bore end (12) of the at least one secondary bore (11) is formed having a drill taper of 140.

12. The component according to claim 1, characterized in that the first channel (4) is a collector bore of an inline piston pump or a radial piston pump of a fuel injection system of an internal combustion engine.

13. A housing of a high-pressure fuel pump, comprising a first high-pressure channel and at least one second high-pressure channel, a longitudinal axis of the first channel being at an acute or right angle to a longitudinal axis of the second channel and the second channel leading into the first channel, such that an intersection is formed, wherein the first channel is formed by a central bore and at least one secondary bore that enlarges a cross-section of the central bore, a longitudinal axis of the secondary bore and a longitudinal axis of the central bore extending parallel to one another, characterized in that the central bore (10) passes through the component (1) and consists of a first segment (8) extending over the intersection and a second segment (9) connected to the first segment, and in that the at least one secondary bore (11) extends only along the first segment (8) and no secondary bore is provided along the second segment (9).

14. The housing according to claim 13, characterized in that respectively one secondary bore (11) that enlarges the cross-section of the central bore (10) is formed on both sides of the central bore (10).

15. The housing according to claim 14, characterized in that longitudinal axes of the central bore (10) and two secondary bores (11) lie in a common plane.

16. The housing according to claim 13, characterized in that the at least one secondary bore (11) has the same bore diameter as the central bore (10).

17. The housing according to claim 13, characterized in that the at least one secondary bore (11) has a smaller bore diameter than the central bore (10).

18. The housing according to claim 13, characterized in that a cross-sectional area of the first segment of the first channel (4) is greater than a cross-sectional area of the second channel (5).

19. The housing according to claim 13, characterized in that a cross-sectional area of the second channel (5) substantially corresponds to a cross-sectional area of the central bore (10) of the first channel (4).

20. The housing according to claim 13, characterized in that a bore end (12) of the at least one secondary bore (11) is spherically shaped.

21. The housing according to claim 13, characterized in that the central bore (10) has a high-pressure connection (2), which comprises an outwardly diverging, conical sealing surface (3), at an end of the second segment (9).

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) The invention is explained below in detail with the aid of the exemplary embodiments that are schematically depicted in the drawings. In the drawings:

(2) FIG. 1 shows a design of a so-called fan intersection according to the prior art;

(3) FIG. 2 shows a design according to the invention in a first sectional view; and

(4) FIG. 3 shows the design according to FIG. 2 in a sectional view along the line III-III of FIG. 2.

DETAILED DESCRIPTION

(5) In FIG. 1, a component 1 carrying a high-pressure medium is shown in accordance with the prior art, e.g. a housing of a high-pressure fuel pump of a fuel injection system of an internal combustion engine. The component 1 comprises a high-pressure connection 2 which has a conical sealing surface 3 that can interact with a corresponding mating surface of the connection pipe. The high-pressure connection 2 leads to a first channel 4 which is designed as a bore in the housing 1. A second channel 5, which is likewise designed as a bore, leads at a right angle into the first channel 4. In order to achieve a cross-sectional enlargement in the region of the intersection between the first channel 4 and the second channel 5, the first channel 4 is formed from a central bore and two secondary bores that are disposed on both sides of the central bore and enlarge the cross-section of said central bore. The axes of the secondary bores extend at an acute angle with respect to the axis of the central bore in a segment 6, which extends from the high-pressure connection 2 to the axis of the second channel 5; so that a fan-shaped arrangement results. The axes of the secondary bores extend parallel to the axis of the central bore in a segment 7 which directly connects to the segment 6. The bores of the first segment 6 and the bores of the second segment 7 are bored from opposite sides of the component 1. In the embodiment according to FIG. 1, a total of six bores are therefore required. Hence, this design is cost intensive and sensitive to manufacturing tolerances.

(6) In the inventive design according to FIG. 2, only three bores are, however, necessary without the stress level in the region of the intersection being negatively impacted. The first channel 4 has a first segment 8 and a second segment 9 which directly join each other. The first segment 8 thereby extends over the intersection of the second channel 5 with the first channel 4, so that the intersection completely lies in the first segment 8. The first channel 4 is only formed by the central bore 10 in the second segment 9, whereas the first channel 4 is formed by the central bore 10 and the secondary bores 11 in the first segment 8, as can be seen particularly in the cross-sectional view according to FIG. 3. The secondary bores 11 can be machined at the end 12 thereof with the aid of a spherical head in order to obtain a corresponding curved end surface.