CN1077224C - Fuel injection valve for internal combustion engine - Google Patents
Fuel injection valve for internal combustion engine Download PDFInfo
- Publication number
- CN1077224C CN1077224C CN97102877A CN97102877A CN1077224C CN 1077224 C CN1077224 C CN 1077224C CN 97102877 A CN97102877 A CN 97102877A CN 97102877 A CN97102877 A CN 97102877A CN 1077224 C CN1077224 C CN 1077224C
- Authority
- CN
- China
- Prior art keywords
- valve
- blind hole
- supporting surface
- conical
- fuel injection
- 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.)
- Expired - Fee Related
Links
- 238000002347 injection Methods 0.000 title claims abstract description 24
- 239000007924 injection Substances 0.000 title claims abstract description 24
- 239000000446 fuel Substances 0.000 title claims abstract description 19
- 238000002485 combustion reaction Methods 0.000 title claims description 8
- 238000007789 sealing Methods 0.000 claims description 16
- 238000010304 firing Methods 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- FGRBYDKOBBBPOI-UHFFFAOYSA-N 10,10-dioxo-2-[4-(N-phenylanilino)phenyl]thioxanthen-9-one Chemical compound O=C1c2ccccc2S(=O)(=O)c2ccc(cc12)-c1ccc(cc1)N(c1ccccc1)c1ccccc1 FGRBYDKOBBBPOI-UHFFFAOYSA-N 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
Images
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
- F02M61/1886—Details of valve seats not covered by groups F02M61/1866 - F02M61/188
-
- 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
- F02M61/1806—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for characterised by the arrangement of discharge orifices, e.g. orientation or size
- F02M61/1833—Discharge orifices having changing cross sections, e.g. being divergent
Abstract
To reduce harmful space formed in a bag hole, and improve injection performance by forming, in a circular cone shape, an end part closed the bag hole for guiding a valve element which is removably in an axial direction, and forming a cylindrical annular land between a circular cone shaped valve seat surface of the bag hole and the circular cone shaped end part. In a fuel injection valve which a piston shaped valve element 1 is removably guided in an axial direction in the bag hole 3 of a valve body 5, a circular cone shaped valve seal surface 7 is formed on the lower end part of the valve element 1, and the valve seal surface 7 is sit on the circular con shaped valve seat surface 9 formed on an end part which is projected and closed inward the bag hole 3. Two injection holes 11 are formed around the valve body 5 starting from the valve seat surface 9, and a cylindrical annular step part or an annular land 15 is formed subsequent to the end part of the downstream side of the valve seat surface 9. The size of the axial direction X of the annular land 15 is set to the maximum 0.1mm, and a boundary is brought into contact with the circular cone shaped surface 17 of the bag hole 13 on the end part of a side opposite to the valve seat surface 9.
Description
The present invention relates to a kind of fuel injection valve for IC engines.
For such Fuelinjection nozzle of announcing by DE-OS 3306078, in of valve body is designed to the pilot hole of blind hole, used one in face of closing force direction, the piston valve gating element (valve pin) that can move vertically.This valve element has a conical valve sealing surface at the end of its firing chamber one side, and it and a conical valve seat supporting surface one work, and supporting surface is positioned at the closed end that blind hole extends internally.At least open an indoor spray-hole of combustion in IC engine for the treatment of fuel feeding from the conical valve seat supporting surface like this, valve is sealed by the valve sealing face of valve element when injection valve seals. and the end in the downstream-directed of valve base supporting surface is being close to a pressure channel that forms in the valve body between valve element axle and blind hole wall, the fuel that is under the high pressure by it is introduced to valve seat.
The closed end of the Fuelinjection nozzle blind hole of announcing is cylindrical or spherical, so that for being used for processing exit surface of Grinding tools formation of valve base supporting surface.Yet this has a shortcoming, with the acting in conjunction process at valve element tip in, form a big relatively dead band in the closed end of blind hole, have the fuel loss amount of negative influence to be collected at here to course of injection.
The objective of the invention is to reduce the dead band in the fuel injection valve for internal combustion engines valve body, thereby between the tapered distal end of conical valve seat supporting surface and blind hole, be furnished with a cylinder annular joint.The shape of blind hole closed end and valve seat supporting surface are irrelevant thus, and the dead band just can reduce to minimum like this.
The present invention proposes a kind of fuel injection valve for IC engines door, having one is guided in the blind hole of valve body, can overcome the axially movable valve element of closing force, on its end, has a conical valve sealing surface, the upper conical valve base supporting surface one of closed end of the inside projection of it and blind hole works, injection valve has one at least from the spray-hole of valve base supporting surface out to combustion chambers of internal combustion engines, spray-hole is covered by valve sealing face when injection valve seals, it is characterized in that, blind hole is processed to taper in its closed end, here, in the downstream of conical valve seat supporting surface, between the tapered distal end of conical valve seat supporting surface and blind hole, is furnished with a cylinder annular joint.
It has the following advantages comparatively speaking: by improving the geometric format of blind hole closed end in the valve body, the dead band that forms in it can be reduced to minimum.This is achieved by a cylinder annular joint in blind hole closed end scope in the very simple mode of structure, and it makes the valve base supporting surface to separate from the extended surface of closed end.Provide an instrument outlet by this annular joint of installing for processing valve base supporting surface simultaneously between the closed end face of valve base supporting surface and blind hole, it has nothing to do with the closed end shape of blind hole.The result can form its shape and the irrelevant closed end of valve base supporting surface now.
In order to form an especially little dead band, this closed end is processed to taper, so only remaining very little gap size between blind hole wall and valve sealing face.
It is neighbouring by rounding that the bottom of the taper closed end of blind hole and end are preferably in the valve element termination of scabbling, so near the also only surplus next minimum dead band valve element of adjacency valve base.
A very little cylinder annular joint enough has been used to make valve base supporting surface instrument free export to have aforementioned good result, and therefore, its size that extends axially need be greater than 0.1mm.The cone angle of conical valve seat supporting surface is processed into approximately with the cone angle of blind hole taper closed end and equates, therefore with the cooperative process of the cone of valve sealing face in can obtain minimum as far as possible residue gap size, this advantageous particularly.
The tapered distal end of this and annular joint adjacency preferably is drilled to a little circular cone, and it is then ground by valve base and is reduced to minimum value.
Other advantage of object of the present invention and advantageous embodiments can be inferred from explanation, accompanying drawing and book.
According to the embodiment of fuel injection valve for IC engines door of the present invention, will represent in the accompanying drawings and explanation in detail in the following description.
Fig. 1 has showed a width of cloth sectional arrangement drawing, and it is by the injection lateral end of the known Fuelinjection nozzle gate seat of others, and it has blind hole closed end structure of the present invention.
Part only topmost with the present invention in Fig. 1, firing chamber one side is represented to have guided the valve element 1 of an axially movable plunger of energy in the blind hole 3 of valve body 5 among the embodiment according to fuel injection valve for IC engines of the present invention.Valve element 1 has a conical valve sealing surface 7 at the downside end of its close firing chamber, and it and conical valve seat supporting surface 9 one work, and supporting surface is positioned on the closed end of blind hole 3 inside projections.Open two spray-holes 11 by valve base supporting surface 9 like this, it leads at combustion in IC engine indoor around valve body 5.When the entrance port of spray-hole 11 was sealed when injection valve, by 7 sealings of the valve sealing face on the valve element 1, this moment, a sealing spring that is not expressed was resisted against valve element 1 on the valve base.For from the fuel high pressure source preferably from a jet pump, supply is in fuel high pressure under, pressure chamber 13 of formation between the wall of the pole face of valve element 1 and blind hole 3, it continues up to the end of the aligning updrift side of valve base supporting surface 9.
In order irrespectively to design the geometrical shape of blind hole 3 closed end with valve base supporting surface 9, the end adjacency of aiming at downstream direction of cylinder ring-shaped step or annular joint 15 and valve base supporting surface 9, the diameter of annular joint is 0.6mm to the maximum, and its distance that extends axially is 0.1mm to the maximum.The closed end face 17 of annular joint its end that deviates from valve base supporting surface 9 of 15 usefulness and empty tapered blind hole 3 is adjacent.The conical valve seat supporting surface 9 here preferably has identical cone angle with the empty tapered distal end 17 of blind hole 3, when being close to valve base 9 with convenient valve element 1, keeps very little as far as possible at the sealing surface 7 of valve element 1 and the gap size between blind hole 3 walls.In order to adapt to the top of scabbling 19 of valve element 1, the sealing bottom surface 21 of the empty tapered distal end 17 of blind hole 3 is processed to circle, when valve element 1 is close to valve base 9, between the bottom surface 21 of valve element top 19 and blind hole 3, only remain next very small space like this.
Therefore for according to fuel injection valve of the present invention.Can the dead band between the closed end that be enclosed in valve element 1 and blind hole 3 be reduced widely, and can not damage the high quality of processing of the valve base supporting surface 9 of sealing surface effect.
Claims (5)
1. fuel injection valve for IC engines door, have in the blind hole (3) and be guided in valve body (5), can overcome the axially movable valve element of closing force (1), on its end, has a conical valve sealing surface (7), the upper conical valve base supporting surface (9) of closed end of the inside projection of it and blind hole (3) works, injection valve has one at least from the spray-hole (11) of valve base supporting surface (9) out to combustion chambers of internal combustion engines, spray-hole (11) is covered by valve sealing face (7) when injection valve seals, it is characterized in that, blind hole (3) is processed to taper in its closed end (17), here, downstream in conical valve seat supporting surface (9) is furnished with a cylinder annular joint (15) between the tapered distal end (17) of conical valve seat supporting surface (9) and blind hole (3).
2. according to the described fuel injection valve of claim 1, it is characterized in that the distance that extends axially that is positioned at the cylinder annular joint (15) between the tapered distal end (17) of valve base supporting surface (9) and blind hole (3) is 0.1mm to the maximum.
3. according to the described fuel injection valve of claim 1, it is characterized in that conical valve seat supporting surface (9) has identical coning angle with the conical surface of blind hole (3) closed end (17).
4. according to the described fuel injection valve of claim 1, it is characterized in that, scabbled with the end (19) of the valve element (1) of conical valve sealing surface (7) adjacency.
5. according to the described fuel injection valve of claim 4, it is characterized in that, be processed to circle with the bottom surface (21) of adjacent blind hole (3) closed end of conical surface (17), make when valve element (1) is close to valve base (9), between the bottom surface (21) of valve element termination (19) of scabbling and blind hole (3), only remain the dead band of a minimum.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19609218.3 | 1996-03-09 | ||
| DE1996109218 DE19609218B4 (en) | 1996-03-09 | 1996-03-09 | Fuel injection valve for internal combustion engines |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1160815A CN1160815A (en) | 1997-10-01 |
| CN1077224C true CN1077224C (en) | 2002-01-02 |
Family
ID=7787756
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN97102877A Expired - Fee Related CN1077224C (en) | 1996-03-09 | 1997-03-06 | Fuel injection valve for internal combustion engine |
Country Status (5)
| Country | Link |
|---|---|
| JP (1) | JPH09242650A (en) |
| CN (1) | CN1077224C (en) |
| DE (1) | DE19609218B4 (en) |
| FR (1) | FR2745853B1 (en) |
| GB (1) | GB2310893B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100432422C (en) * | 2004-06-21 | 2008-11-12 | 株式会社京浜 | Fuel injection valve |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10232049A1 (en) * | 2002-07-16 | 2004-02-05 | Robert Bosch Gmbh | Fuel injection valve for internal combustion engines |
| DE10249144A1 (en) * | 2002-10-22 | 2004-05-06 | Robert Bosch Gmbh | Fuel injection valve for internal combustion engines |
| DE102004033283A1 (en) * | 2004-07-09 | 2006-02-02 | Robert Bosch Gmbh | Fuel injection valve for internal combustion engines |
| JP4025768B2 (en) * | 2004-09-27 | 2007-12-26 | 株式会社ケーヒン | Fuel injection valve |
| GB0625770D0 (en) * | 2006-12-22 | 2007-02-07 | Delphi Tech Inc | Fuel injector for an internal combustion engine |
| DE102009002480A1 (en) * | 2009-04-20 | 2010-10-21 | Robert Bosch Gmbh | Fuel injector |
| CN103423760B (en) * | 2013-08-31 | 2016-01-20 | 魏伯卿 | Olefin plant heating furnace oxygen enrichment part oxygenation efflux combustion-supportinmethod energy-saving and emission-reduction system |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4540126A (en) * | 1982-04-08 | 1985-09-10 | Nissan Motor Co., Ltd. | Fuel injection nozzle |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE976061C (en) * | 1952-05-03 | 1963-02-07 | Sulzer Ag | Liquid-cooled injection nozzles for internal combustion engines |
| JPS505015U (en) * | 1973-05-17 | 1975-01-20 | ||
| DE3014958A1 (en) * | 1980-04-18 | 1981-10-29 | Robert Bosch Gmbh, 7000 Stuttgart | Fuel injector IC engine - has needle valve shaped to avoid wear effects on seat dia. |
| JPS578364U (en) * | 1980-06-14 | 1982-01-16 | ||
| DE3306078A1 (en) * | 1983-02-22 | 1984-08-23 | Robert Bosch Gmbh, 7000 Stuttgart | FUEL INJECTION NOZZLE FOR INTERNAL COMBUSTION ENGINES |
| JPS6026163A (en) * | 1983-07-23 | 1985-02-09 | Toyota Motor Corp | Fuel injection valve for diesel engine |
| ATE39546T1 (en) * | 1985-10-22 | 1989-01-15 | Voest Alpine Automotive | METHOD OF MAKING AN INJECTOR BODY. |
| JPH0643496Y2 (en) * | 1988-07-25 | 1994-11-14 | 株式会社ゼクセル | Fuel injection nozzle |
| JPH0267459A (en) * | 1988-08-31 | 1990-03-07 | Nippon Denso Co Ltd | Fuel injection nozzle |
| JP2750715B2 (en) * | 1988-12-12 | 1998-05-13 | 株式会社ゼクセル | Fuel injection nozzle |
| GB9012844D0 (en) * | 1990-06-08 | 1990-08-01 | Lucas Ind Plc | Fuel injection nozzles |
-
1996
- 1996-03-09 DE DE1996109218 patent/DE19609218B4/en not_active Expired - Fee Related
-
1997
- 1997-02-12 GB GB9702798A patent/GB2310893B/en not_active Expired - Fee Related
- 1997-03-06 CN CN97102877A patent/CN1077224C/en not_active Expired - Fee Related
- 1997-03-07 JP JP9052702A patent/JPH09242650A/en active Pending
- 1997-03-07 FR FR9702748A patent/FR2745853B1/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4540126A (en) * | 1982-04-08 | 1985-09-10 | Nissan Motor Co., Ltd. | Fuel injection nozzle |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100432422C (en) * | 2004-06-21 | 2008-11-12 | 株式会社京浜 | Fuel injection valve |
Also Published As
| Publication number | Publication date |
|---|---|
| GB2310893A (en) | 1997-09-10 |
| FR2745853A1 (en) | 1997-09-12 |
| GB9702798D0 (en) | 1997-04-02 |
| FR2745853B1 (en) | 1999-05-14 |
| DE19609218B4 (en) | 2007-08-23 |
| GB2310893B (en) | 1998-05-06 |
| CN1160815A (en) | 1997-10-01 |
| DE19609218A1 (en) | 1997-09-11 |
| JPH09242650A (en) | 1997-09-16 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20020102 Termination date: 20120306 |