CN1510268A - Fuel jet valve for IC engine - Google Patents
Fuel jet valve for IC engine Download PDFInfo
- Publication number
- CN1510268A CN1510268A CNA2003101215356A CN200310121535A CN1510268A CN 1510268 A CN1510268 A CN 1510268A CN A2003101215356 A CNA2003101215356 A CN A2003101215356A CN 200310121535 A CN200310121535 A CN 200310121535A CN 1510268 A CN1510268 A CN 1510268A
- Authority
- CN
- China
- Prior art keywords
- blind hole
- supporting surface
- valve body
- fuelinjection nozzle
- circular groove
- 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.)
- Pending
Links
- 239000000446 fuel Substances 0.000 title claims abstract description 18
- 238000007789 sealing Methods 0.000 claims description 14
- 238000002485 combustion reaction Methods 0.000 claims description 9
- 230000000694 effects Effects 0.000 claims description 2
- 230000000284 resting effect Effects 0.000 abstract 4
- 238000002347 injection Methods 0.000 abstract 1
- 239000007924 injection Substances 0.000 abstract 1
- 238000010304 firing Methods 0.000 description 3
- 230000003116 impacting effect Effects 0.000 description 3
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 230000008676 import Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000005498 polishing Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 230000003313 weakening effect Effects 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
- F02M61/168—Assembling; Disassembling; Manufacturing; Adjusting
-
- 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
- F02M47/00—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure
- F02M47/02—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure of accumulator-injector type, i.e. having fuel pressure of accumulator tending to open, and fuel pressure in other chamber tending to close, injection valves and having means for periodically releasing that closing pressure
- F02M47/027—Electrically actuated valves draining the chamber to release the closing pressure
-
- 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
- F02M61/04—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00 having valves, e.g. having a plurality of valves in series
- F02M61/10—Other injectors with elongated valve bodies, i.e. of needle-valve type
-
- 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
- F02M2200/16—Sealing of fuel injection apparatus not otherwise provided for
-
- 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
- F02M2547/00—Special features for fuel-injection valves actuated by fluid pressure
- F02M2547/001—Control chambers formed by movable sleeves
-
- 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
- F02M61/04—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00 having valves, e.g. having a plurality of valves in series
- F02M61/10—Other injectors with elongated valve bodies, i.e. of needle-valve type
- F02M61/12—Other injectors with elongated valve bodies, i.e. of needle-valve type characterised by the provision of guiding or centring means for valve bodies
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
The fuel injection valve has a valve body (1) with a resting surface (50) pressed against another resting surface (55) by a clamping nut (7). The valve body contains a blind boring (10) from the resting surface, ontaining fluel under high pressure. There is an annular groove (42) in the blind boring at a spacing from the resting surface.
Description
Technical field
The present invention relates to a kind of Fuelinjection nozzle that is used for internal-combustion engine.
Background technique
As known by DE100 24 703 A1, this Fuelinjection nozzle comprises a valve body, wherein constructed a blind hole, this blind hole originates in a supporting surface of valve body and be configured with a plurality of jetburners on the end of its sealing, is installed at Fuelinjection nozzle that these jetburners lead to the firing chamber of internal-combustion engine on the position of internal-combustion engine.In blind hole, be provided with a needle that can vertically move, this needle with the end of its combustion chamber side be configured in valve seat in the valve body and cooperatively interact and jetburner is opened or closed.Can inject the fuel under the high pressure by input pipe in the space that keeps between the wall of needle and blind hole, fuel only just is ejected in the firing chamber by jetburner when needle has discharged jetburner.
The supporting surface that valve body begins to locate with its blind hole rests on the supporting surface of another parts of Fuelinjection nozzle, for example on telophragma or the holder.At this, valve body is pressed on these another parts as a turnbuckle by a clamp device, so that obtain the corresponding sealing of blind hole on supporting surface.But because the high pressure in the blind hole still may form blow-by between valve body and another parts, because can not at random improve power also because big relatively supporting surface only can reach very little compressive load per unit area by clamp device.
Summary of the invention
According to the present invention, a kind of Fuelinjection nozzle that is used for internal-combustion engine has been proposed, has a valve body, this valve body rests on a supporting surface on the supporting surface of another parts of this Fuelinjection nozzle, the effect that reaches by a device is pressed on these another parts, wherein in valve body, constructed a blind hole, this blind hole originate in valve body supporting surface and wherein fuel at least temporarily be under the high pressure, wherein, the supporting surface that is in the parameatal valve body on the supporting surface in blind hole is constructed to sealing surface, wherein, in the blind hole of valve body, to the certain distance of supporting surface, constructing a circular groove.
By contrast, Fuelinjection nozzle of the present invention has its advantage, has promptly improved the sealing on the valve body supporting surface.For this reason, in the blind hole of valve body, near described supporting surface, constructed a circular groove.To cause by the high pressure of fuel in the blind hole and the expansion of this circular groove to make the parameatal zone of blind hole on the supporting surface be raised slightly and be pressed on described another parts thus.Improved the compressive load per unit area that centers on the described blind hole around openings zone thus, this makes sealing be enhanced.
In order to optimize sealing function, the degree of depth of circular groove is 1 to 3mm to be proved to be favourable, and at this moment the distance of circular groove and described supporting surface is preferably 0.5 to 1.5mm less than 2mm.
Concentrating and prevent reducing of stability in order to limit the stress that is produced by circular groove, advantageously, is semicircular with selecting the cross section of circular groove.Under any circumstance should avoid the sharp-pointed seamed edge in circular groove zone, because will when reaching the high pressure of 150MPa, cause the remarkable weakening of valve body like this by the notch stress that occurs.
Description of drawings
The embodiment of Fuelinjection nozzle of the present invention represents in the accompanying drawings, wherein,
Fig. 1 is the longitudinal section of Fuelinjection nozzle of the present invention, and
Fig. 2 is the enlarged partial view of circular groove section among Fig. 1.
Embodiment
Fig. 1 is the longitudinal section of Fuelinjection nozzle of the present invention.This Fuelinjection nozzle comprises a valve body 1, and this valve body rests on the supporting surface 55 of a telophragma 3 with a supporting surface 50.The opposite side of telophragma 3 rests on the holder 5, and wherein valve body 1 is pressed on telophragma 3 by the turnbuckle 7 on the outside thread that is engaged on holder 5 and is pressed on thus on the holder 5.In valve body 1, constructed the blind hole 10 that step is arranged on the diameter, this blind hole from supporting surface 50 initial and on the end of its sealing by one basically the valve seat 14 of taper constitute the border.Be configured with a plurality of jetburners 16 on the combustion chamber side end of valve body 1, they lead to the firing chamber of internal-combustion engine.In blind hole 10, be provided with a piston-like needle 12 that can vertically move, this needle has a valve sealing surface 15 at its valve seat side end, it and valve seat 14 cooperatively interact and constitute a valve in this wise, it will be from the annular space 18 that keeps between the wall of needle 12 and blind hole 10 to opening being connected of jetburner 16 or closed.
Deviating from the end of valve seat, blind hole 10 extended reaching are provided with a sleeve pipe 22 here, and this sleeve pipe surrounds the end section that deviates from valve seat of needle 12 and rests on the telophragma 3.In addition, needle 12 is surrounded by a supporting ring 26, and this supporting ring 26 is bearing on the ring shoulder of needle 12.Be provided with a closing spring 24 between supporting ring 26 and sleeve pipe 22, it is configured to helical compression spring and surrounds needle 12.Precompression by closing spring 24 makes a closing force to acting on the direction of valve seat 14 on the needle 12, and this closing force is pressed on the valve seat 14 its valve sealing surface 15 of needle 12 usefulness.
Be directed in the centre portion 112 of needle 12 in blind hole 10, wherein be provided with 4 polishing parts 20 on this centre portion 112, they can realize fuel flowing to jetburner 16 directions.Being provided with on the end of valve seat and pressing shoulder 9 of centre portion 112, this presses shoulder to be loaded by the fuel pressure in the annular space 18.Blind hole 10 can be injected high pressure fuel down by an input channel 8 that extends in holder 5 and the telophragma 3, when needle 12 fuel when valve seat 14 lifts will flow to jetburner by polishing part 20 and annular space 18.
End face that deviates from valve seat and telophragma 3 by sleeve pipe 22, needle 12 define a control room 30, be injected into fuel in this control room and when relevant pressure with an action of hydraulic force on needle 12, this power is pointed to valve seat 14 and is used on the same direction with the masterpiece of closing spring 24 thus.Control room 30 is connected with input channel 8 by an input throttle valve 32, and thus, as long as be low pressure in this control room, fuel always flows to the control room 30 from input channel 8.In addition, control room 30 can be connected with leakage of oil chamber 36 by an output throttling valve 34, and this connection can be opened and close by control valve 40.Reaching the definite of parameter who imports throttle valve 32 on the other hand by one side output throttling valve 34 can reach: when control valve 40 is opened, pass through the fuel quantity of throttle valve 34 outflows more than the fuel quantity that passes through to import throttle valve 32 inflows by control room 30.Pressure in the relative input channel 8 of pressure in the control room 30 is descended, and needle 12 will lift and discharge jetburner 16 by pressing the action of hydraulic force on the shoulder 9 from valve seat 14.By the closure of control valve 40, the fuel that is flowed into immediately by input throttle valve 32 will rebulid a high fuel pressure in control room 30, and this pressure is corresponding to the pressure in the input channel 8.The power of hydraulic coupling on the end face that acts on needle 12 of Xing Chenging and closing spring 24 will be above acting on the hydraulic coupling of pressing on shoulder 9 and the valve sealing surface 15 thus, so that needle 12 turns back to and contacts with valve seat 14 and close jetburner 16.
When above-mentioned Fuelinjection nozzle was worked, reaching thus in input channel 8, the fuel in blind hole 10 was under the jet pressure all the time.Can not form blow-by for the supporting surface 50 at valve body 1 contacts with the supporting surface 55 of telophragma 3 and constitutes on the position of a sealing surface, the impacting force of turnbuckle 7 must be correspondingly high.But this power is subjected to the restriction of material condition, and therefore the sealing on this position only always can not be accomplished by the impacting force of turnbuckle 7.Parameatal impacting force for the blind hole 10 that further improves on supporting surface 50 constitutes is provided with a circular groove 42 near supporting surface 50 places in blind hole 10, this circular groove on its whole diameter around the wall of blind hole 10.In Fig. 2, express this zone once more enlargedly, here for clarity sake, wherein omitted sleeve pipe 22 and needle 12 and valve body 1 only is shown.
In order to reach required function, on the one hand, circular groove 42 must deeply a bit and have very small distance to supporting surface 50; On the other hand, form the concentrated valve body 1 that weakens thus in this zone that reaches of strong stress by dark circular groove 42, this will cause plastic deformation, and itself can influence the function of Fuelinjection nozzle this distortion.In addition, circular groove 42 can not at random reduce to the distance of supporting surface 50 reason for processing technique.
For optimizational function, preferably, circular groove and supporting surface 50 be under 0.5 to 1.5mm the situation apart from a, the degree of depth t of circular groove is 1 to 3mm, this is proved to be favourable.In order to make notch stress keep as far as possible little, circular groove 42 is provided with semi-circular cross-section, to this also replacedly, constructs the shape that shape therewith departs from a bit, as the semiellipse shape etc.
Claims (7)
1. Fuelinjection nozzle that is used for internal-combustion engine, has a valve body (1), this valve body rests on a supporting surface (50) on the supporting surface (55) of another parts (3) of this Fuelinjection nozzle, the effect that reaches by a device (7) is pressed on these another parts (3), wherein in valve body (1), constructed a blind hole (10), this blind hole originate in valve body (1) supporting surface (50) and wherein fuel at least temporarily be under the high pressure, wherein, the supporting surface (50) that is in the parameatal valve body (1) on the supporting surface (50) in blind hole (10) is constructed to sealing surface, it is characterized in that: constructing a circular groove (42) in the blind hole (10) of valve body (1) to the certain distance of supporting surface (50).
2. according to the Fuelinjection nozzle of claim 1, it is characterized in that: circular groove (42) tangentially extends in the wall of blind hole (10).
3. according to the Fuelinjection nozzle of claim 2, it is characterized in that: circular groove (42) has the degree of depth (t) of 1mm to 3mm.
4. according to the Fuelinjection nozzle of claim 2, it is characterized in that: circular groove has a distance to described supporting surface, and this distance value is preferably 0.5mm to 1.5mm less than 2mm.
5. according to the Fuelinjection nozzle of claim 2, it is characterized in that: circular groove (42) has the basic semicircular cross section that is.
6. according to the Fuelinjection nozzle of claim 1, it is characterized in that: the closed end in blind hole (10) is provided with jetburner (16).
7. according to the Fuelinjection nozzle of claim 6, it is characterized in that: be provided with needle (12) in blind hole (10), this needle opens or closes jetburner (16).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10260724.9 | 2002-12-23 | ||
| DE2002160724 DE10260724A1 (en) | 2002-12-23 | 2002-12-23 | Fuel injection valve for internal combustion engines |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1510268A true CN1510268A (en) | 2004-07-07 |
Family
ID=32404212
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2003101215356A Pending CN1510268A (en) | 2002-12-23 | 2003-12-19 | Fuel jet valve for IC engine |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP1433951A1 (en) |
| JP (1) | JP2004204850A (en) |
| CN (1) | CN1510268A (en) |
| DE (1) | DE10260724A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102338008A (en) * | 2010-07-14 | 2012-02-01 | 株式会社电装 | Fuel injection device |
| CN104265534A (en) * | 2014-08-05 | 2015-01-07 | 中国第一汽车股份有限公司无锡油泵油嘴研究所 | Oil injecting speed-variable common rail system oil injector |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102004005451A1 (en) * | 2004-02-04 | 2005-08-25 | Robert Bosch Gmbh | Fuel injection system for internal combustion engines |
| DE102005038444A1 (en) * | 2005-05-02 | 2006-11-09 | Robert Bosch Gmbh | Fuel injection valve for internal combustion engines |
| DE102005054927A1 (en) * | 2005-11-17 | 2007-05-31 | Siemens Ag | Fuel injector for common rail diesel injection for diesel engine, has nozzle needle which has steps in its shaft and damping chamber is formed in area of steps between shaft of nozzle needle and housing wall |
| DE102006029392A1 (en) * | 2006-06-27 | 2008-01-03 | Robert Bosch Gmbh | injector |
| DE102008000171B4 (en) * | 2007-01-31 | 2017-04-06 | Denso Corporation | Injector and plate component for this |
| DE102007017126A1 (en) * | 2007-04-11 | 2008-10-16 | Robert Bosch Gmbh | Injection Module |
| DE102008040381A1 (en) * | 2008-07-14 | 2010-01-21 | Robert Bosch Gmbh | High pressure resistant fuel injector |
| EP2336543A3 (en) * | 2009-12-21 | 2013-07-03 | Robert Bosch GmbH | Fuel injector valve for combustion engines |
| DE102011078429A1 (en) * | 2011-06-30 | 2013-01-03 | Robert Bosch Gmbh | Fuel injector |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10008554A1 (en) * | 2000-02-24 | 2001-08-30 | Bosch Gmbh Robert | Fuel injection valve for internal combustion engines |
| DE10024703A1 (en) * | 2000-05-18 | 2001-11-22 | Bosch Gmbh Robert | Injection arrangement for fuel storage injection system has valve unit blocking auxiliary channel and outlet path in alternation |
-
2002
- 2002-12-23 DE DE2002160724 patent/DE10260724A1/en not_active Withdrawn
-
2003
- 2003-06-10 EP EP03013030A patent/EP1433951A1/en not_active Withdrawn
- 2003-12-19 CN CNA2003101215356A patent/CN1510268A/en active Pending
- 2003-12-22 JP JP2003425670A patent/JP2004204850A/en not_active Withdrawn
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102338008A (en) * | 2010-07-14 | 2012-02-01 | 株式会社电装 | Fuel injection device |
| US8544767B2 (en) | 2010-07-14 | 2013-10-01 | Denso Corporation | Fuel injection device |
| CN102338008B (en) * | 2010-07-14 | 2014-10-01 | 株式会社电装 | Fuel injection device |
| CN104265534A (en) * | 2014-08-05 | 2015-01-07 | 中国第一汽车股份有限公司无锡油泵油嘴研究所 | Oil injecting speed-variable common rail system oil injector |
Also Published As
| Publication number | Publication date |
|---|---|
| EP1433951A1 (en) | 2004-06-30 |
| JP2004204850A (en) | 2004-07-22 |
| DE10260724A1 (en) | 2004-07-01 |
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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 | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |