CN1066802C - Jet nozzle and fuel jetting method to internal combustion engine - Google Patents
Jet nozzle and fuel jetting method to internal combustion engine Download PDFInfo
- Publication number
- CN1066802C CN1066802C CN95108417A CN95108417A CN1066802C CN 1066802 C CN1066802 C CN 1066802C CN 95108417 A CN95108417 A CN 95108417A CN 95108417 A CN95108417 A CN 95108417A CN 1066802 C CN1066802 C CN 1066802C
- Authority
- CN
- China
- Prior art keywords
- nozzle tip
- disruption member
- nozzle
- oil
- chamber
- 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
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
-
- 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
- F02M61/162—Means to impart a whirling motion to fuel upstream or near discharging orifices
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B3/00—Engines characterised by air compression and subsequent fuel addition
- F02B3/06—Engines characterised by air compression and subsequent fuel addition with compression ignition
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
- F02F7/00—Casings, e.g. crankcases or frames
- F02F2007/0097—Casings, e.g. crankcases or frames for large diesel engines
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
The lower part of a nozzle head 2 is provided with an injection hole 6 and a cavity 9. A bar-shaped interference member 7, whose one end is mounted to a fixed part 8 formed on one side surface of the cavity 9 and the other end is arranged so as to project into the injection hole 6 in the other side surface of the cavity 9, generates oscillation with high frequency with fuel flow through the cavity 9. This oscillation of the bar-shaped interference member 7 provides alteration or modulation of an annular clearance structure of a cross section of the injection hole 6 that adjusts fuel flow synchronously with the oscillation. This alteration or modulation of the annular clearance structure affect a velocity vector of fuel flowing from an annular clearance, and provides the flowing fuel with a turbulence state.
Description
The present invention relates to a kind of nozzle tip that is used for oil nozzle.The invention still further relates to a kind of oil nozzle and a kind of internal-combustion engine that adopt nozzle tip of the present invention in addition.
Oil nozzle with the injection valve use that combines, so that with fuel oil, is to be injected to together in the firing chamber of internal-combustion piston engine with pressurized air or other gas usually in some cases.Usually determine by the geometrical property of oil nozzle in the fuel jet shape that in the firing chamber, forms between injection period.
Patent documentation CH645699 discloses a kind of nozzle that is used for injection valve, and it has the plane of the generation vortex that is fixedly installed on nozzle tip inside, thereby fuel oil band vortex ground penetrates from nozzle tip, and easily atomizing is opened thus.
The defective of the nozzle of this known configurations form is that fuel jet is evenly to penetrate.
The objective of the invention is to improve the nozzle tip of oil nozzle, make the flow pattern of the fuel oil that penetrates from nozzle tip have the characteristic of turbulent flow.
For realizing technical theme according to above-mentioned purpose of the present invention, a kind of nozzle tip that is used for oil nozzle is provided, this nozzle tip has a chamber and an oil-feed port, and the tunnel-shaped through hole that has an ejection fuel oil at least, wherein, be provided with a rotation disruption member in the chamber of nozzle tip, disruption member has a barrel surface and a rotation axis, barrel surface has one at least with respect to the rotation axis inclined notches formed, wherein this disruption member can be caused rotation by the fuel oil that flows through groove, it is characterized in that, barrel surface is positioned at before the inlet of through hole, the rotation disruption member periodically covers in the inlet of tunnel-shaped through hole like this, so that make the fuel oil of outflow produce the flow characteristic of turbulent flow thus.
Favourable structure of the present invention also is:
The chamber has a cylindrical part with axis of symmetry at least in the through hole position, its further groove distributes on whole width with respect to rotation axis, and disruption member is so to be arranged in the chamber, promptly makes the axis of symmetry and rotation axis overlap;
Disruption member is the cylindrical gears that has helical teeth; Be provided with a blind hole, ball of the overhang bracket of this blind hole, disruption member then is bearing on this ball;
Through hole has one at least at its groove that vertically distributes;
Groove is that spirality distributes.
Nozzle tip of the present invention has the movable disruption member of the portion that sets within it, and this disruption member produces motion owing to fuel oil flows through nozzle tip, thereby becoming a mandarin of spray orifice changes all the time, and this can improve the turbulence scale that flows out fuel oil greatly.In addition, the motion of disruption member has been regulated as holding of time several fuel oil discharge, outlet velocity and flow direction.
The disruption member of revolving form comprises parts, for example can be arranged on rotatably in the nozzle tip inner chamber but these parts are unrestricted motion ground.This disruption member can produce motion by the fuel oil that flows, and for example rotates.Because this motion, disturbed of the inlet of spray orifice constantly partly or entirely seals and reopens, and makes fuel oil spray from spray orifice in a kind of mode of turbulent flow of pulsed.Disruption member has such structure, and the feasible fuel oil that flows makes disruption member produce motion, and for example disruption member is made helical gear, and make disruption member produce rotation with the fuel oil that flows through tooth this moment.Making free-moving disruption member to have many kinds of possibilities, for example also can adopt spherical or oval-shaped disruption member.
An advantage of the present invention is that owing to constitute the fuel jet of turbulent shape, the combustion process of carrying out in the fuel chambers makes nitrogen oxides (NO
X) the effulent minimizing.The eddy current that forms on the fuel jet edge also makes flue gas partly be rolled in the zone of combustion, and this is called " inner smoke backflow ".The flue gas of inertia has reduced the partial pressure of oxygen, thereby has reduced the temperature in the flame, and this has just made oxides of nitrogen emissions reduce under little backflow situation.
Another advantage of nozzle tip of the present invention is, disruption member can be combined into one with the nozzle tip of known form of implementation, so just can make and the known form of implementation identical nozzle tip of structure in appearance, thereby can successfully change existing nozzle tip with nozzle tip of the present invention.
Another advantage is that can disruption member be produced by means of the fuel oil that flows moves, and makes the disruption member motion without any need for the driving mechanism of additional costliness.
The contrast accompanying drawing is described the present invention in detail below.In the accompanying drawing:
Fig. 1 is the longitudinal section of oil nozzle, is not shown disruption member for the purpose of understanding,
Fig. 2 is the longitudinal section that has the nozzle tip of disruption member,
Fig. 2 a is the time dependent expander graphs of fuel jet,
Fig. 2 b, 2d, the sectional drawing when in the spray orifice disruption member being housed among the 2f,
Fig. 2 c, 2e, 2g are views that the spray orifice that disruption member is housed is seen from the nozzle tip outside,
Fig. 2 h is the longitudinal section of a spray orifice entrance part,
Fig. 3 is a longitudinal section that the nozzle tip of rotation disruption member is housed,
Fig. 3 a is the time dependent expander graphs of fuel jet,
Fig. 3 b is a view that spray orifice is seen from the nozzle tip outside,
Fig. 3 c is the longitudinal section of a spray orifice.
Fig. 1 is the longitudinal section of an oil nozzle 20, and this oil nozzle for example is used for large-scale diesel engine.Nozzle tip 2 links to each other with a nozzle body 1 and a chamber 9, an opening 5 is arranged or claim oil-feed port 5 and at least one nozzle opening 6.Chamber 9 is columnar and an axis B is arranged.Spray orifice 6 has inlet 6a and outlet 6b.4 the pressure fuel oil is conducted to opening 5 through holing, fuel flow can utilize spring-loaded needle-valve 3 to regulate.The layout of spray orifice 6 is decided by the position of oil nozzle in the firing chamber.For the circumferential injection that is generally used for two stroke engine, spray orifice is that bunchy ground is provided with toward the direction.For four stroke engine, usually by a central nozzle injected fuel, so spray orifice 6 is to be evenly distributed on the side face of nozzle tip 2.For clarity sake, not shown disruption member among Fig. 1.
The bottom of the nozzle tip 2 that comprises a spray orifice 6 and a chamber 9 has been shown among Fig. 2.Be provided with bar-shaped disruption member 7 in the chamber 9, disruption member 7 is contained on the side in chamber 9 by standing part 8, and stretch in the spray orifice 6 at chamber 9 opposite sides, the diameter of spray orifice 6 is selected must be greater than the diameter of disruption member 7, and disruption member 7 does not contact with spray orifice 6 when being in position of rest.Can disruption member 7 be inserted in the nozzle tips 2 through spray orifice 6 man-hour adding.For fixing disruption member 7, boring 8 can be set on spray orifice 6 axis dorsal part prolongations, the clavate disruption member can be inserted in this boring and can fix by soldering.The size of selected clavate disruption member 7 also is contained in the chamber 9, make disruption member owing to the fuel oil that flows in the chamber 9 that constitutes blind hole structure is placed in the dither, its effect is, the annular space physical dimension (shape) of the cross section that spray orifice 6 intermediate fuel oils flow out correspondingly changes in time or regulates, thereby the velocity vector of outflow fuel oil on annular space exerted an influence.The disruption member 7 of vibration makes the distribution of fuel oil speed of ejection asymmetric, thereby at the nozzle tip 2 outside turbulent structures that produce, shown in Fig. 2 a.Fig. 2 a shows fuel jet 22 spread scenarios in time of ejection from top to bottom, and it has the forward position 22a that penetrates in the firing chamber.Can recognize that tear the path that makes the fyord shape that flue gas sucks by the edge plume that forms, this can stop the formation of nitrogen oxides in burning.In order to obtain the flow graph shown in the figure, the clavate disruption member has very little amplitude just enough.Have under some situation, large amplitude is disadvantageous at spray orifice 6 internal convection cardons, therefore as Fig. 2 b, shown in the 2c, comes the amplitude of limit interferences part 7 to prove favourable by the fin 10 that is contained on the disruption member 7.In an illustrated embodiment, three fins 10 that distributed on the side face of disruption member 7, they are parallel to the axis of disruption member 7.
Shown in Fig. 2 d and 2e, be distributed on the disruption member 7 to fin 10 spiralitys and prove favourable, apply a vortex motion at the fuel oil that flows out from spray orifice 6 like this, thereby the subtended angle of beam is increased.Fig. 2 f and 2g show the spray orifice 6 of the another kind of structure of knowing clearly.Be arranged in the spray orifice 6 to movable disruption member 7 tapers, the annular space 6c between spray orifice 6 and the disruption member 7 is conical expansion from inlet 6a to outlet 6b like this.The advantage of the annular space 6c of this structure is can stop at the fuel oil that condenses near the formation of nozzle opening axis 6d place to drip.The favourable structure of the inlet 6a of nozzle opening 6 has been shown among Fig. 2 h.Inlet 6a has the mouth of a rounding, and it is for example made with the method for electrochemistry flash removed.This rounding mouth guarantees that the mobility status in the spray orifice 6 remains unchanged in long run time at one.
In another embodiment of the present invention, as shown in Figure 3, packing into one in the chamber 9 that constitutes blind hole 11 structures along axis of symmetry B is processed with the cylindrical gears 12 of helical teeth, and it rotates by fuel oil stream between fuel injection period, thereby periodically covers in the inlet 6a of spray orifice 6.Cylindrical gears 12 just constitutes the disruption member 12 of a rotation like this.Cylindrical gears 12 is columniform, and its running shaft A overlaps with symmetry axis B in the present embodiment.Helical gear 12 have some grooves distributed 12a on its whole width, and its direction so tilts with respect to running shaft A, make the fuel oil that flows into that cylindrical gears 12 is produced and rotatablely move.At the end of blind hole 11 9a a ball 14 is housed, as the supporting of rotation disruption member 12, so that it is minimum to rub.
Preferably so determine the gap width 15 between nozzle tip 2 and the rotation disruption member 12, make that promptly the friction that is produced is minimum.Rotation disruption member 12 periodically covers in the inlet 6a of spray orifice 6, thereby shown in Fig. 3 a, forms the fuel jet 21 of a branch of ejection, and it has propagating in the firing chamber with turbulent of pulsed to be afraid of forward position 21a, 21b, 21c.The injection of fuel oil is subjected to periodic interference like this, forms a plurality of beams forward position 21a thus, 21b, and 21c because the turbulence intensity that these places had makes products of combustion be rolled in the fuel jet, can stop the formation of nitrogen oxides so thus.
Do excellent 12 with rotation and combine, spray orifice 6 can be made columniform, includes a smooth inwall, and perhaps as Fig. 3 b and 3c as shown in, formation can cause the structure of vortex, at this moment the groove 16 of a spiral extension in inwall still on the spray orifice 6.Spray orifice 6 and its inwall can have any structure form, because the pulse feature of the fuel oil that flows through produces at inlet 6a place.
Claims (8)
1. the nozzle tip (2) that is used for oil nozzle (20), this nozzle tip (2) has a chamber (9) and an oil-feed port (5), and the tunnel-shaped through hole (6) that has an ejection fuel oil at least wherein, is provided with a rotation disruption member (7 in the chamber (9) of nozzle tip (2); 12), disruption member (12) has a barrel surface (12b) and a rotation axis (A), barrel surface (12b) has one at least with respect to rotation axis (A) inclined notches formed (12a), wherein this disruption member can be caused rotation by the fuel oil that flows through groove (12a), it is characterized in that, the inlet (6a) that barrel surface (12b) is positioned at through hole (6) before, rotation disruption member (12) periodically covers in the inlet (6a) of tunnel-shaped through hole (6) like this, so that make the fuel oil of outflow produce the flow characteristic of turbulent flow thus.
2. press the nozzle tip (2) of claim 1, it is characterized in that, there is a cylindrical part with the axis of symmetry (B) in chamber (9) at least in through hole (6) position, its further groove (12a) distributes on whole width with respect to rotation axis (A), and disruption member (12) is so to be arranged in the chamber (9), promptly makes the axis of symmetry (B) and rotation axis (A) overlap.
3. by the nozzle tip (2) of claim 2, it is characterized in that disruption member (12) is the cylindrical gears that has helical teeth.
4. by the nozzle tip (2) of claim 1, it is characterized in that be provided with a blind hole (11), the end of this blind hole (9a) supports a ball (14), disruption member (12) then is bearing on this ball.
5. by the nozzle tip (2) of claim 1, it is characterized in that through hole (6) has one at least at its groove (16) that vertically distributes.
6. by the nozzle tip (2) of claim 1, it is characterized in that groove (16) is that spirality distributes.
7. an oil nozzle is characterized in that, it comprises one by described nozzle tip (2) one of in the claim 1 to 6.
8. an internal-combustion engine is characterized in that, it comprises one according to the described oil nozzle of claim 7.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP94810420.3 | 1994-07-15 | ||
| EP19940810420 EP0692625B1 (en) | 1994-07-15 | 1994-07-15 | Nozzle for a fuel injection valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1133394A CN1133394A (en) | 1996-10-16 |
| CN1066802C true CN1066802C (en) | 2001-06-06 |
Family
ID=8218285
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN95108417A Expired - Fee Related CN1066802C (en) | 1994-07-15 | 1995-07-14 | Jet nozzle and fuel jetting method to internal combustion engine |
Country Status (7)
| Country | Link |
|---|---|
| EP (1) | EP0692625B1 (en) |
| JP (1) | JP3738053B2 (en) |
| KR (1) | KR100386183B1 (en) |
| CN (1) | CN1066802C (en) |
| DE (1) | DE59409040D1 (en) |
| DK (1) | DK0692625T3 (en) |
| FI (1) | FI106740B (en) |
Families Citing this family (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3810583B2 (en) * | 1999-05-13 | 2006-08-16 | 三菱電機株式会社 | Fuel injection valve |
| EP1353061B1 (en) * | 2002-04-11 | 2008-03-05 | Wärtsilä Schweiz AG | Nozzle for fuel injector |
| DE10350548A1 (en) * | 2003-10-29 | 2005-06-02 | Robert Bosch Gmbh | Fuel injector |
| FR2888618B1 (en) | 2005-07-13 | 2007-09-14 | Renault Sas | GAS INJECTION NOZZLE |
| WO2010035311A1 (en) * | 2008-09-24 | 2010-04-01 | トヨタ自動車株式会社 | Fuel injection valve for internal combustion engine and method of manufacturing the same |
| CN104265530B (en) * | 2014-07-31 | 2016-08-31 | 中国第一汽车股份有限公司无锡油泵油嘴研究所 | Automatically controlled internal combustion engine injector control valve |
| CN105275698B (en) * | 2015-11-13 | 2017-11-10 | 吉林大学 | A kind of engine variable-frequency fuel-injection mouth |
| CN105715439A (en) * | 2016-03-30 | 2016-06-29 | 无锡美羊动力科技有限公司 | Anti-clogging diesel nozzle internally provided with double grinding teeth |
| CN105715438A (en) * | 2016-03-30 | 2016-06-29 | 无锡美羊动力科技有限公司 | Efficient diesel engine oil nozzle internally provided with triangular rotary tooth |
| CN105715440A (en) * | 2016-03-30 | 2016-06-29 | 无锡美羊动力科技有限公司 | Oil-removal diesel nozzle |
| CN106150820A (en) * | 2016-07-12 | 2016-11-23 | 江西汇尔油泵油嘴有限公司 | The method of disturbance diesel oil and atomizer |
| US10151235B2 (en) | 2017-03-07 | 2018-12-11 | Caterpillar Inc. | Ducted combustion system for an internal combustion engine |
| CN108533377A (en) * | 2018-04-16 | 2018-09-14 | 浙江创格科技有限公司 | A kind of injector assembly of high cooling efficiency |
| DK180103B1 (en) * | 2018-12-11 | 2020-05-04 | MAN Energy Solutions | Internal combustion engine |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1028215A (en) * | 1950-11-21 | 1953-05-20 | Augustin Chantiers Et Ateliers | Fuel sprayer improvements |
| US4796816A (en) * | 1987-09-21 | 1989-01-10 | Gregory Khinchuk | Impinging-jet fuel injection nozzle |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH340093A (en) * | 1956-05-12 | 1959-07-31 | Sulzer Ag | Fuel injector and method for making the same |
| DE4200709A1 (en) * | 1992-01-14 | 1993-07-15 | Bosch Gmbh Robert | FUEL INJECTION NOZZLE FOR INTERNAL COMBUSTION ENGINES |
-
1994
- 1994-07-15 EP EP19940810420 patent/EP0692625B1/en not_active Expired - Lifetime
- 1994-07-15 DE DE59409040T patent/DE59409040D1/en not_active Expired - Fee Related
- 1994-07-15 DK DK94810420T patent/DK0692625T3/en active
-
1995
- 1995-06-22 JP JP15648695A patent/JP3738053B2/en not_active Expired - Fee Related
- 1995-07-06 KR KR1019950019718A patent/KR100386183B1/en not_active IP Right Cessation
- 1995-07-13 FI FI953430A patent/FI106740B/en not_active IP Right Cessation
- 1995-07-14 CN CN95108417A patent/CN1066802C/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1028215A (en) * | 1950-11-21 | 1953-05-20 | Augustin Chantiers Et Ateliers | Fuel sprayer improvements |
| US4796816A (en) * | 1987-09-21 | 1989-01-10 | Gregory Khinchuk | Impinging-jet fuel injection nozzle |
Also Published As
| Publication number | Publication date |
|---|---|
| FI106740B (en) | 2001-03-30 |
| DK0692625T3 (en) | 2000-04-17 |
| FI953430A (en) | 1996-01-16 |
| DE59409040D1 (en) | 2000-02-03 |
| EP0692625B1 (en) | 1999-12-29 |
| EP0692625A1 (en) | 1996-01-17 |
| JP3738053B2 (en) | 2006-01-25 |
| FI953430A0 (en) | 1995-07-13 |
| KR100386183B1 (en) | 2003-08-06 |
| CN1133394A (en) | 1996-10-16 |
| JPH0849634A (en) | 1996-02-20 |
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Legal Events
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| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C53 | Correction of patent for invention or patent application | ||
| CB02 | Change of applicant information |
Applicant after: New Sulzer Diesel A G Applicant before: New Sulzer Diesel AG |
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| COR | Change of bibliographic data |
Free format text: CORRECT: APPLICANT; FROM: NEW SULZER DIESEL AG TO: WARTSILA NSD SCHWEIZ AG |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |