EP1880101A1 - Ventil, insbesondere kraftstoffeinspritzventil - Google Patents
Ventil, insbesondere kraftstoffeinspritzventilInfo
- Publication number
- EP1880101A1 EP1880101A1 EP06725242A EP06725242A EP1880101A1 EP 1880101 A1 EP1880101 A1 EP 1880101A1 EP 06725242 A EP06725242 A EP 06725242A EP 06725242 A EP06725242 A EP 06725242A EP 1880101 A1 EP1880101 A1 EP 1880101A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- valve
- coating
- valve element
- transition
- microns
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
- F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
- F02M61/18—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for
- F02M61/1873—Valve seats or member ends having circumferential grooves or ridges, e.g. toroidal
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
- F02M2200/02—Fuel-injection apparatus having means for reducing wear
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
- F02M2200/90—Selection of particular materials
- F02M2200/9038—Coatings
Definitions
- Valve in particular fuel injection valve _ 0
- the invention is based on a valve, as shown, for example, in the published patent application DE 100 38 954 A1.
- a valve preferably as a force
- valve member 5 is formed fuel injector, has a housing in which a valve element is movably arranged.
- the valve member has various faces that are subject to repeated sliding or impact loading during operation of the valve. At least some of these sub-surfaces are provided with a wear-reducing coating, which reduces the wear caused by the sliding or
- a sharp edge is formed.
- the coating stripping process continues over the life of the valve until the wear-reducing effect is severely compromised, which can significantly shorten the life of the valve.
- DE 101 33 433 shows coatings, in particular also diamond-like coatings, of both the valve element and the surfaces interacting with the valve element
- valve element has a coating which acts to reduce wear.
- the coating here comprises the entire surface of the valve member including the valve sealing surface which cooperates with the valve seat.
- Partial surfaces of the valve element is maintained over the entire life of the valve. For this purpose, edges which are formed within the coated partial surfaces or at the edge of the coated partial surfaces, formed rounded. This can reliably prevent the coating from flaking off in this area.
- valve sealing surface formed as a substantially conical valve sealing surface which cooperates with a valve seat which is formed in the housing.
- the valve element moves in its longitudinal direction, so that an impact load occurs between the valve sealing surface and the valve seat when the fuel flow to the injection openings is controlled by the longitudinal movement of the valve element.
- annular groove is formed, which at the transition to the valve sealing surface, a first and a second transition edge having.
- these transition edges are rounded, so that the wear-reducing coating adheres reliably to the entire valve sealing surface and in particular in the region of the transition edges.
- the coated partial surface is formed as a cylindrical guide portion, with which the valve element is guided in a corresponding bore in the housing.
- the edges delimiting the guide section of the valve element are likewise rounded here in order to ensure the adhesion of the wear-reducing coating.
- the rounding of the edges is preferably done with a radius which is in the range of 10 microns to 250 microns. In this case, a range of 100 ⁇ m to 150 ⁇ m is particularly advantageous, in particular in the area of the valve sealing surface of a valve element.
- FIG. 1 shows a section through a valve, which is shown here as a fuel injection valve
- FIG. 2 shows an enlarged view of the area designated by II
- FIG. 1 A first figure.
- FIG. 1 a valve according to the invention, which is shown here as a fuel injection valve, is shown in longitudinal section.
- the valve has a housing 1, in - A -
- a hole 3 is formed.
- the bore 3 is delimited at its brennraumsei- term end of a substantially conical valve seat 9, from which emanate a plurality of injection openings 11, which open in installation position of the valve in a combustion chamber of the corresponding internal combustion engine.
- a substantially conical valve seat 9 from which emanate a plurality of injection openings 11, which open in installation position of the valve in a combustion chamber of the corresponding internal combustion engine.
- a piston-shaped valve element 5 is arranged, which has a guide portion 15, with which the valve element 5 is guided in a corresponding bore portion 23 of the bore 3.
- the valve element 5 tapers from the guide section 15 to form a pressure shoulder 13 and merges into a shank region 25 which extends as far as a substantially conical valve section.
- valve sealing surface 7 extends.
- the valve sealing surface 7 forms a partial surface of the valve element 5, with which the valve element 5 cooperates with the conical valve seat 9.
- the bore 3 is radially expanded, so that a pressure chamber 19 is formed, which continues the valve element 5 surrounding to the valve seat 9. In the radial extension of the pressure chamber 19 opens
- Fuel is filled under high pressure.
- valve element 5 is acted upon at its end remote from the valve seat by a closing force, which, for example, is achieved hydraulically or by a spring element.
- valve element 5 moves away from the valve seat 9 and the injection openings 11 free or it moves into contact with the valve seat 9 and thus closes the injection openings 11 with respect to the pressure chamber 19th Whether the control ultimately by the Closing force or by a variable i 0 pressure in the pressure chamber 19, depends on the type of valve. Valves of this type are preferably used in self-igniting internal combustion engines. In Figure 2, the designated portion II of Figure 1 is shown enlarged.
- the valve sealing surface 7 has a first conical surface 32 and a second conical surface 34 which are separated by an annular groove 30, wherein
- the annular groove 30 has a width d.
- a first transition edge 36 is formed, and at the transition of the annular groove 30 to the second conical surface 34, a second transition edge 38.
- the opening angle of the first conical surface 32 is smaller than the opening angle of the conical valve seat 9 during the Opening angle of the second
- the valve element 5 comes to rest in its closed position with the first transition edge 36 on the valve seat 9.
- the first transition edge 36 thus forms a sealing edge against which a high surface pressure prevails, so that the injection openings 11 are safe even at high pressure in the pressure chamber 19
- the valve sealing surface 7 is provided with a coating 40 which has a wear-reducing effect and which has e.g. is designed as a diamond-like layer, that is a so-called diamond-like carbon layer (DLC layer).
- a coating 40 which has a wear-reducing effect and which has e.g. is designed as a diamond-like layer, that is a so-called diamond-like carbon layer (DLC layer).
- DLC layer diamond-like carbon layer
- the first transition edge 36 and the second transition edge 38 are each formed rounded, for example. With a radius R, as indicated in Figure 2.
- the rounding radius R is in this case in the range of 10 microns to 250 microns, preferably in the range of 100 microns to 150 microns.
- the width d of the annular groove 30 is preferably in the range of about 500 microns, so that a soft, continuous transition i 0 is given by the first cone surface 32 to the annular groove 30 and from this to the second cone surfaces 34.
- a third transition edge 39 which is formed at the transition of the first conical surface 32 to the shaft region 25 of the valve element 5, also with a radius R to round.
- a wear-reducing coating 40 to be applied to the partial surface of the valve element 5, which forms the guide portion 15.
- a rounding radius R is provided at the transition of the guide portion 15 to the pressure shoulder 13, so that the coating 40 does not dissolve in this area.
- valve element 5 with a wear-reducing coating 40 over its entire surface, because it may be more favorable in terms of process technology to provide the entire valve element 5 with a DLC layer and not just partial surfaces thereof.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE200510020365 DE102005020365A1 (de) | 2005-05-02 | 2005-05-02 | Ventil, insbesondere Kraftstoffeinspritzventil |
| PCT/EP2006/060959 WO2006117266A1 (de) | 2005-05-02 | 2006-03-22 | Ventil, insbesondere kraftstoffeinspritzventil |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1880101A1 true EP1880101A1 (de) | 2008-01-23 |
| EP1880101B1 EP1880101B1 (de) | 2012-05-16 |
Family
ID=36499681
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP06725242A Expired - Lifetime EP1880101B1 (de) | 2005-05-02 | 2006-03-22 | Ventil, insbesondere kraftstoffeinspritzventil |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP1880101B1 (de) |
| CN (1) | CN101171421A (de) |
| DE (1) | DE102005020365A1 (de) |
| WO (1) | WO2006117266A1 (de) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080152491A1 (en) * | 2006-12-26 | 2008-06-26 | Davies Lucy V | Coatings for use in fuel system components |
| DE102007062701A1 (de) * | 2007-12-27 | 2009-07-02 | Robert Bosch Gmbh | Kraftstoffeinspritzdüse |
| US9051910B2 (en) * | 2013-01-31 | 2015-06-09 | Caterpillar Inc. | Valve assembly for fuel system and method |
| DE102015225733A1 (de) | 2015-12-17 | 2017-06-22 | Robert Bosch Gmbh | Kraftstoffeinspritzdüse |
| GB2561574B (en) * | 2017-04-18 | 2020-09-23 | Delphi Tech Ip Ltd | Needle coating for injector closed loop |
| CN114962105A (zh) * | 2022-05-06 | 2022-08-30 | 北京理工大学 | 一种进行涂层处理的单体泵控制阀 |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2001061182A1 (en) * | 2000-02-15 | 2001-08-23 | Caterpillar Inc. | Thin film coatings for fuel injector components |
| DE10038954A1 (de) * | 2000-08-09 | 2002-02-28 | Siemens Ag | Ventil, insbesondere Einspritzventil |
| JP2004028051A (ja) * | 2002-06-28 | 2004-01-29 | Denso Corp | 燃料噴射ノズルおよびその製造方法 |
| DE10313225A1 (de) * | 2003-03-25 | 2004-10-07 | Robert Bosch Gmbh | Kraftstoffeinspritzventil für Brennkraftmaschine |
| DE102004046886A1 (de) * | 2004-09-28 | 2006-04-13 | Robert Bosch Gmbh | Kraftstoffeinspritzventil für eine Brennkraftmaschine |
-
2005
- 2005-05-02 DE DE200510020365 patent/DE102005020365A1/de not_active Withdrawn
-
2006
- 2006-03-22 EP EP06725242A patent/EP1880101B1/de not_active Expired - Lifetime
- 2006-03-22 CN CNA2006800151772A patent/CN101171421A/zh active Pending
- 2006-03-22 WO PCT/EP2006/060959 patent/WO2006117266A1/de not_active Ceased
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2006117266A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2006117266A1 (de) | 2006-11-09 |
| EP1880101B1 (de) | 2012-05-16 |
| DE102005020365A1 (de) | 2006-11-09 |
| CN101171421A (zh) | 2008-04-30 |
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