Valve for a flowing fluid

Patent metadata

Field	Value
Publication number	US-9587608-B2
Application number	US-201214239086-A
Country	US
Kind code	B2
Filing date	Jul 5, 2012
Priority date	Aug 18, 2011
Publication date	Mar 7, 2017
Grant date	Mar 7, 2017

Abstract

A metering valve or an injector includes: a valve-seat member which closes a valve chamber and has a central valve opening, and a spray orifice disk downstream from the valve-seat member in the flow direction of the fluid, which has at least one spray orifice. The spray orifice disk has a swirl chamber concentric with the spray orifice and at least one swirl duct leading from the swirl chamber to beneath the valve opening, and the swirl chamber and swirl duct are integrally formed as recesses into the disk surface of the spray orifice disk facing the valve body. The swirl duct has a duct cross section and the spray orifice has an orifice cross section such that the ratio of the duct cross section to the orifice cross section is equal to or greater than 1.5.

First claim

What is claimed is:

1. A metering valve for a flowing fluid, wherein the metering valve is configured as an injector for an internal combustion engine, comprising:
a valve-seat member which closes a valve chamber, wherein a valve opening is formed in the valve-seat member; and
a spray orifice disk positioned downstream from the valve-seat member in the flow direction of the fluid, the spray orifice disk having at least one spray orifice, a swirl chamber which is concentric with the spray orifice and at least one swirl duct leading from the swirl chamber to beneath the valve opening, wherein the swirl chamber and the swirl duct are integrally formed as recesses into the disk surface of the spray orifice disk facing the valve-seat member, and wherein the swirl duct has a duct cross section and the spray orifice has an orifice cross section which are dimensioned in such a way that the ratio of the duct cross section to the orifice cross section is equal to or greater than 1.5,
wherein the swirl duct has an inflow region leading away from the valve opening and an incident flow region opening into the swirl chamber, the incident flow region is situated in such a way that the fluid flows tangentially into the swirl chamber,
wherein a single spray orifice is present, which is situated at a radial distance from the valve opening, and wherein two curved swirl ducts are guided to the swirl chamber of the single spray orifice, the two curved swirl ducts being situated laterally reversed from each other.

2. The valve as recited in claim 1 , wherein the swirl chamber has a chamber diameter and an axial chamber depth which are dimensioned in such a way that the ratio of the chamber depth to the chamber diameter is in a value range having a lower limiting value of 0.2 and an upper limiting value of 0.6.

3. The valve as recited in claim 2 , wherein the spray orifice has an orifice length and an orifice diameter which are dimensioned in such a way that the ratio of the orifice length to the orifice diameter is in a value range having a lower limiting value of 0.2 and an upper limiting value of 0.6.

4. The valve as recited in claim 2 , wherein the valve-seat member has a flat outer surface facing away from the valve chamber, and the spray orifice disk rests directly against the outer surface of the valve-seat member.

5. The valve as recited in claim 4 , wherein an annular wall is integrally molded on the spray orifice disk in one piece and extends circumferentially at the edge over the valve-seat member.

6. The valve as recited in claim 2 , wherein the valve-seat member has an outer surface facing away from the valve chamber, and a compensating disk is situated between the spray orifice disk and the outer surface of the valve-seat member, the compensating disk having (i) a flat disk surface resting in a planar manner against the spray orifice disk and (ii) a central hole which is coaxial with the valve opening.

7. The valve as recited in claim 2 , wherein the spray orifice disk has a disk thickness ranging from 0.15 mm to 0.25 mm.

8. The valve as recited in claim 2 , wherein the swirl chamber and the swirl duct are integrally formed into the spray orifice disk one of (i) with the aid of embossing or (ii) by material ablation with the aid of one of spark erosion, etching or ultrashort laser pulses.

9. The valve as recited in claim 1 , wherein the width of the swirl duct (i) tapers in the inflow region in the flow direction of the fluid and (ii) is at least approximately constant in the incident flow region.

10. The valve as recited in claim 1 , wherein the swirl duct has (i) an outer duct side wall at least in the incident flow region, which is tangentially guided to the wall of the swirl chamber, and (ii) an inner duct side wall located at a distance opposite the outer duct side wall such that an imaginary vanishing line of the inner duct side wall extends through the spray orifice.

11. The valve as recited in claim 1 , wherein the at least one spray orifice has a cylindrical shape.

12. The valve as recited in claim 1 , wherein the at least one spray orifice has a truncated cone shape with an increasing cross section in the flow direction.

13. The valve as recited in claim 1 , wherein the at least one spray orifice has a spray orifice axis extending one of at a right angle or at an acute angle to the disk surface of the spray orifice disk.

14. The valve as recited in claim 1 , wherein the valve-seat member, together with the spray orifice disk which is attached to the valve-seat member, is inserted into and fixedly connected to the open end of a sleeve-shaped valve seat support.

Assignees

• Jeannel Laurent
• Koch Kerstin
• Thoemmes Franz
• Stahl Martin
• Bosch Gmbh Robert

Inventors

• Jeannel Laurent
• Koch Kerstin
• Thoemmes Franz
• Stahl Martin

Classifications

• B05B1/3436 Primary

  the interface being a plane perpendicular to the outlet axis · CPC title

• B05B1/3463

  the channels extending outwardly, e.g. radially from the inside to the outside · CPC title

• F02M61/162

  Means to impart a whirling motion to fuel upstream or near discharging orifices · CPC title

• F02M61/1833

  Discharge orifices having changing cross sections, e.g. being divergent · CPC title

• F02M61/1853

  Orifice plates · CPC title