Valve for metering a flowing medium

Patent metadata

Field	Value
Publication number	US-9828960-B2
Application number	US-201214124995-A
Country	US
Kind code	B2
Filing date	Apr 25, 2012
Priority date	Jun 9, 2011
Publication date	Nov 28, 2017
Grant date	Nov 28, 2017

Abstract

A valve for metering a flowing medium, e.g., an injection valve for fuel-injection systems of internal combustion engines, is provided. In an embodiment, the valve has a sealing seat formed by a valve seat and a sealing head of a valve member able to be driven to execute lift motions. The valve has a plurality of spray orifices having hole-entry openings situated downstream from the sealing seat and sealable by the sealing seat. The valve has flow-through channels situated upstream from the sealing seat, which extend parallel to each other and discharge in front of the sealing seat. In order to achieve a unified upstream flow approach of all hole-entry openings of the spray orifices, e.g., if the number of spray orifices and flow-through channels differs, an upstream-flow shaper having at least one flow-through opening is situated between sealing seat and hole-entry openings of the spray orifices.

First claim

What is claimed is:

1. A valve for metering a flowing medium, comprising:
a valve-seat body including an inner surface situated at a spray-discharge end of the valve;
a sealing seat, formed by a valve seat and a sealing head of a valve member able to be driven to execute lift motions, wherein the valve seat is formed on the inner surface of the valve-seat body;
a plurality of spray orifices including hole entry openings situated downstream from the sealing seat and able to be closed by the sealing seat, wherein the hole entry openings are formed on the inner surface of the valve-seat body;
flow-through channels situated upstream from the sealing seat, which extend parallel to one another and discharge in front of the sealing seat; and
an upstream-flow shaper having at least one flow-through opening is situated between the sealing seat and the hole entry openings of the plurality of spray orifices,
wherein the upstream-flow shaper is developed as a flat upstream-flow disk,
wherein the upstream-flow shaper and the valve member contact the inner surface of the valve-seat body,
wherein the inner surface of the valve-seat body is situated in an interior of the valve seat body,
wherein, at a location of the contact between the upstream-flow shaper and the valve member, the inner surface of the valve seat body is exposed to the flowing medium, and
wherein the upstream-flow shaper is fixedly connected to the inner surface of the valve seat body.

2. The valve as recited in claim 1 , wherein the flat upstream-flow disk has exactly one single flow-through opening, the single flow-through opening being disposed in centered manner in the upstream-flow disk in the form of a central hole.

3. The valve as recited in claim 1 , wherein a plurality of flow-through openings is provided in the flat upstream-flow disk, the plurality of flow-through openings being radially extending slots and aligned in the shape of a star in the flat upstream-flow disk, the number of slots matching the number of spray orifices of the plurality of spray orifices.

4. The valve as recited in claim 1 , wherein the flat upstream-flow disk has a multitude of flow-through openings, which are developed as circular holes.

5. The valve as recited in claim 4 , wherein the multitude of flow-through openings are small, circular holes.

6. The valve as recited in claim 1 , wherein the hole entry openings of the plurality of spray orifices are situated on a first circle, and the flow-through channels are situated on a second circle, set apart from each other, the second circle having a larger diameter than the first circle.

7. The valve as recited in claim 6 , wherein the distances between the hole entry openings and the distances between the flow-through channels are of equal size.

8. The valve as recited in claim 1 , wherein the plurality of spray orifices are situated in the valve-seat body, which includes the valve seat and seals a hollow-cylindrical valve-seat support, and a valve chamber, which is connected to a medium intake, is formed in the valve-seat support, and the flow-through channels are connected to the valve chamber.

9. The valve as recited in claim 8 , wherein the valve-seat body includes a hollow-cylindrical guide nipple which projects into the valve-seat support and includes guide surfaces for the sealing head of the valve member, and the flow-through channels are situated in the cylinder wall of the hollow-cylindrical guide nipple.

10. The valve as recited in claim 9 , wherein the flow-through channels are developed as axial grooves, which are worked into the cylinder wall of the guide nipple and have groove openings that extend between the guide surfaces.

11. The valve as recited in claim 8 , wherein the flat upstream-flow disk in the valve-seat body is fixed in place on a wall region of the valve-seat body that is situated between the valve seat and the hole entry openings of the plurality of spray orifices.

12. The valve as recited in claim 1 , wherein the valve is an injection valve for fuel-injection systems of internal combustion engines.

Assignees

• Vorbach Marco
• Bosch Gmbh Robert

Inventors

• Vorbach Marco

Classifications

• F02M51/0625

  characterised by arrangement of mobile armatures · CPC title

• F02M61/1806 Primary

  characterised by the arrangement of discharge orifices, e.g. orientation or size · CPC title

• F02M61/188

  Spherical or partly spherical shaped valve member ends · CPC title

• F02M61/1853 Primary

  Orifice plates · CPC title

• F02M61/16 Primary

  Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14 · CPC title