EP1049870B1 - Injecteur de carburant pour moteur a combustion interne - Google Patents
Injecteur de carburant pour moteur a combustion interne Download PDFInfo
- Publication number
- EP1049870B1 EP1049870B1 EP99900943A EP99900943A EP1049870B1 EP 1049870 B1 EP1049870 B1 EP 1049870B1 EP 99900943 A EP99900943 A EP 99900943A EP 99900943 A EP99900943 A EP 99900943A EP 1049870 B1 EP1049870 B1 EP 1049870B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- injector
- seat
- slots
- fuel
- guide
- 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 - Lifetime
Links
- 239000000446 fuel Substances 0.000 title claims description 29
- 238000002485 combustion reaction Methods 0.000 title claims description 4
- 238000011144 upstream manufacturing Methods 0.000 claims description 7
- 238000002347 injection Methods 0.000 claims description 6
- 239000007924 injection Substances 0.000 claims description 6
- 238000009792 diffusion process Methods 0.000 claims description 3
- 239000012530 fluid Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
- 239000003302 ferromagnetic material Substances 0.000 description 2
- 239000012634 fragment Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 235000009508 confectionery Nutrition 0.000 description 1
- 238000010894 electron beam technology Methods 0.000 description 1
- 230000005291 magnetic effect Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000008188 pellet Substances 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 238000004804 winding Methods 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
- F02M51/00—Fuel-injection apparatus characterised by being operated electrically
- F02M51/06—Injectors peculiar thereto with means directly operating the valve needle
- F02M51/061—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means
- F02M51/0625—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures
- F02M51/0664—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a cylindrically or partly cylindrically shaped armature, e.g. entering the winding; having a plate-shaped or undulated armature entering the winding
- F02M51/0671—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a cylindrically or partly cylindrically shaped armature, e.g. entering the winding; having a plate-shaped or undulated armature entering the winding the armature having an elongated valve body attached thereto
- F02M51/0675—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a cylindrically or partly cylindrically shaped armature, e.g. entering the winding; having a plate-shaped or undulated armature entering the winding the armature having an elongated valve body attached thereto the valve body having cylindrical guiding or metering portions, e.g. with fuel passages
-
- 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
- F02M51/00—Fuel-injection apparatus characterised by being operated electrically
- F02M51/06—Injectors peculiar thereto with means directly operating the valve needle
- F02M51/061—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means
- F02M51/0625—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures
-
- 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
Definitions
- the present invention relates to fuel injectors in the state of fluid, and in particular liquid, intended for inject the fuel directly into a combustion of a spark ignition engine. She is applicable in particular to petrol injection, but it can also be adapted to other liquid fuels, such as alcohol-based fuels and gas liquefied petroleum.
- injectors for direct injection having an injector body containing a needle axially movable by electrically controlled means (often consisting of a winding) and ended with a obturation element, often hemispherical in shape, cooperating with a fuel passage seat.
- the needle is movable between a first axial position where the shutter rests on the seat and a position where it is moved away.
- WO-A-96/36808 describes an injector fulfilling this function. he includes a fuel rotation chamber around the axis of the shutter element, located upstream seat to avoid dead volume between the seat and the hole this spray.
- the present invention aims in particular to provide a fuel injector responding better than those previously known to the requirements of the practice, in particular in that that it causes the fuel to rotate using simple means of realization, however very effective.
- the invention provides an injector for fuel according to claim 1.
- the vortex effect thus produced has several consequences.
- the swirl of the vaporized fluid that has passed through the diffusion hole closable by the obturation element improves the air-fuel mixture and lengthens the path which would be necessary for the particles to be able to reach the walls.
- the disc is advantageously pinched between the guide, support against an internal shoulder of the body, and the seat which is permanently attached to the body, for example by welding.
- the fuel path to the slots is constituted by the radial clearance provided between the guide and a bore of the body in which it is mounted.
- the needle then mounted with gentle friction in the guide, allows center the latter.
- the radial clearance required for friction sweet is very reduced. It limits the passage of fluid, this which improves the quality of the spray.
- the radial feed clearance can receive fuel through grooves in the upstream face of the guide, pressing against the shoulder internal.
- the disc will have two to eight slots that may be straight or have a bend oriented so as to reinforce the rotation given by the opening of the slots in the central opening.
- the injector whose general constitution is shown in Figure 1 comprises a body 10 in several parts assemblies inside which there is a needle 12 axially displaceable by a coil 14.
- the needle is fixed to a ring 16 made of ferro-magnetic material.
- the needle might as well be ordered electrically by other means, for example by a stack of piezoelectric pellets, or even be controlled by fluid pressure.
- the bore 20 is connected by a shoulder 24 to a recess 26 to which is fixed, generally by welding, a seat 28.
- a diffusion hole 30 into which an element support area opens shutter.
- the seat 28 is fixed by a circular weld 32, produced by laser or electron beam.
- the sealing element of the injector is made up, in the illustrated case, by the end of the needle 12.
- the range on which the needle is supported is for example conical shape, while the end of the needle has a segment shape in its support zones spherical.
- the tip of the terminal part of the needle can be tapered, to reduce the risk of cavitation.
- the coil 14 makes it possible to move the needle, against the action of spring 34, within a limit set by the abutment of the ring 16 against a fixed sleeve 38, which can be made of ferro-magnetic material for complete the magnetic control circuit.
- the injector is provided with fuel rotation means, located upstream of the seat. They include a guide 40 and a disc 42 of generation of vortices, stacked in the recess 26 between the seat 28 and shoulder 24.
- Guide 40 ( Figures 1 to 4) has a side wall cylindrical, slightly smaller in diameter than the diameter of the recess 26. It is pierced with a hole of diameter such that the needle 12 can slide with gentle friction in the guide.
- the guide thus has another function. It defines a annular passage of fuel supply to the seat. For reduce friction, it may present a recess of the genre shown in dashes in Figure 3. It is centered in the recess 26 by the needle, guided at its upper part by the support of the bulges 22 and at its lower part by support on the seat 28.
- the fuel arrives at the annular passage 24 successively by a clearance between the needle and the internal wall of the end portion 18 and by grooves supply 44, four in number in the illustrated case in Figures 2-4.
- the upstream face of the guide advantageously comprises chamfers.
- the disc 42 consists of a flat piece and thin, hollowed out to delimit a central cavity 46, of general circular shape, into which open tangentially of the slots 48, four in number in the case illustrated in Figure 2.
- the outer end of these slots is placed so that the fuel that has passed through the ring clearance can arrive in the slots.
- a chamfer 50 may be provided on the downstream face of guide 40 to allow this feeding.
- the external diameter of the disc 42 is as received with gentle friction in the chamber 26.
- the cutouts of the disc 42 can take forms very diverse.
- the slots 48 are six in number. They present enlargements terminals 52 oriented to have several roles. They facilitate the entry of fuel into the slots 48. They initiate the rotational movement of the fuel in the direction of the arrow f, by the elbow they represent.
- the slots have a 54 throttle converge to their outlet in the cavity central 46.
- the invention is also applicable to injectors of which the sealing means and / or the control means are different from those that have been described.
- it can be used when the element shutter consists of a ball attached to the needle.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Fuel-Injection Apparatus (AREA)
Description
- la figure 1 est une vue d'ensemble d'un injecteur auquel est appliquée l'invention ;
- la figure 2 est une vue éclatée, en perspective, de la partie inférieure de l'injecteur de la figure 1 ;
- la figure 3 est une vue en élévation et en demi-coupe du guide de l'injecteur montré en figures 1 et 2 ;
- la figure 4 est une vue de dessus du guide de la figure 3 ;
- la figure 5 est une vue de dessus d'un disque constituant une variante de réalisation de celui montré en figure 2 ;
- les figures 6 et 7 sont des vues de détail montrant un fragment de disques constituant des variantes de celui de la figure 2.
Claims (7)
- Injecteur de carburant pour injection dans une chambre ce combustion de moteur à allumage commandé, comprenant un corps d'injecteur (10) contenant une aiguille (12) terminée par un élément d'obturation coopérant avec un siège (28) de passage du carburant prolongé par un trou de diffusion, l'aiguille étant déplaçable également entre une première position axiale dans laquelle l'élément d'obturation s'appuie sur le siège et une seconde position où l'élément d'obturation est écarté du siège, l'injecteur comprenant également une chambre de mise en rotation du carburant autour de l'axe de l'élément d'obturation, située en amont du siège,
caractérisé en ce que la chambre est définie par la face amont du siège (28), par un disque (42) appliqué sur le siège et présentant des fentes (48) débouchant tangentiellement dans une ouverture centrale (46) entourant l'élément d'obturation et par un guide d'aiguille (40) constitué de façon à alimenter l'extrémité externe des fentes, présentant un diamètre inférieur à celui d'un chambrage (26) du corps dans lequel il est placé, de façon à laisser subsister un jeu annulaire d'alimentation des fentes. - Injecteur selon la revendication 1, caractérisé en ce que le disque (42) est pincé entre le guide (40) en appui contre un épaulement interne (24) du corps et le siège fixé au corps.
- Injecteur selon la revendication 2, caractérisé en ce que l'aiguille est montée à frottement doux dans le guide.
- Injecteur selon la revendication 3, caractérisé en ce que la face amont du guide, en appui contre l'épaulement interne, comporte des rainures (44) d'alimentation du jeu annulaire en carburant.
- Injecteur selon la revendication 2, 3 ou 4, caractérisé en ce que la face aval du guide comporte un chanfrein (50) d'amenée du carburant depuis le jeu jusqu'à l'extrémité externe des fentes.
- Injecteur selon l'une quelconque des revendications précédentes, caractérisé en ce que le disque comporte de deux à huit fentes.
- Injecteur selon l'une quelconque des revendications 1 à 6, caractérisé en ce que les fentes sont rectilignes ou présentent un coude renforçant la rotation donnée par le débouché des fentes dans l'ouverture centrale (46).
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR9800554A FR2773851B1 (fr) | 1998-01-20 | 1998-01-20 | Injecteur de carburant pour moteur a combustion interne |
| FR9800554 | 1998-01-20 | ||
| PCT/FR1999/000084 WO1999036692A1 (fr) | 1998-01-20 | 1999-01-18 | Injecteur de carburant pour moteur a combustion interne |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1049870A1 EP1049870A1 (fr) | 2000-11-08 |
| EP1049870B1 true EP1049870B1 (fr) | 2002-03-27 |
Family
ID=9521943
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP99900943A Expired - Lifetime EP1049870B1 (fr) | 1998-01-20 | 1999-01-18 | Injecteur de carburant pour moteur a combustion interne |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US6244525B1 (fr) |
| EP (1) | EP1049870B1 (fr) |
| BR (1) | BR9907103A (fr) |
| DE (1) | DE69901095T2 (fr) |
| FR (1) | FR2773851B1 (fr) |
| WO (1) | WO1999036692A1 (fr) |
Families Citing this family (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6125818A (en) * | 1997-03-19 | 2000-10-03 | Hiatchi, Ltd. | Fuel injector and internal combustion engine having the same |
| FR2782751B1 (fr) * | 1998-08-28 | 2002-05-31 | Sagem | Injecteur de carburant fluide pour moteur a combustion interne |
| US6986103B1 (en) * | 1999-12-07 | 2006-01-10 | Microsoft Corporation | Document formatting based on optimized formatting values |
| US6648249B1 (en) * | 2000-08-09 | 2003-11-18 | Siemens Automotive Corporation | Apparatus and method for setting injector lift |
| DE10120462A1 (de) * | 2001-04-26 | 2002-10-31 | Bosch Gmbh Robert | Brennstoffeinspritzventil |
| US6899290B2 (en) * | 2002-06-24 | 2005-05-31 | Delphi Technologies, Inc. | Fuel swirler plate for a fuel injector |
| US7407120B1 (en) * | 2002-11-21 | 2008-08-05 | Jack French | Adjustable racing injector |
| US6991219B2 (en) * | 2003-01-07 | 2006-01-31 | Ionbond, Llc | Article having a hard lubricious coating |
| JP4079144B2 (ja) * | 2004-12-20 | 2008-04-23 | 株式会社豊田中央研究所 | 燃料噴射弁 |
| CN100441838C (zh) * | 2005-12-31 | 2008-12-10 | 西南大学 | 一种同步分层变量电动喷油装置 |
| US7721716B1 (en) | 2008-07-16 | 2010-05-25 | Harwood Michael R | High pressure piezoelectric fuel injector |
| US8316825B1 (en) | 2008-08-04 | 2012-11-27 | French Iii Jack M | Adjustable racing injector |
| US9284930B2 (en) | 2011-06-03 | 2016-03-15 | Michael R. Harwood | High pressure piezoelectric fuel injector |
| CN102828804A (zh) * | 2012-10-09 | 2012-12-19 | 中国重汽集团重庆燃油喷射系统有限公司 | 可形成涡流的尿素喷射器 |
| CN103256106B (zh) * | 2012-12-28 | 2015-12-23 | 湖南吉利汽车部件有限公司 | 无气动辅助scr喷射系统 |
| US10119507B1 (en) * | 2017-07-17 | 2018-11-06 | GM Global Technology Operations LLC | Rotating fuel injector assembly |
| CN107725243A (zh) * | 2017-11-24 | 2018-02-23 | 广西卡迪亚科技有限公司 | 一种单孔雾化喷油器及其后置雾化结构 |
| BR102020021497A2 (pt) | 2020-10-20 | 2022-05-03 | Mrb Machining & Ferramentaria Ltda | Válvula dosadora de combustível de alta vazão |
| EP4303493A1 (fr) | 2021-03-02 | 2024-01-10 | Industrial Atilla Ltda | Dispositif de contrôle rapide de flammes à réponse variable en continu |
| US11939940B2 (en) | 2021-10-04 | 2024-03-26 | Billet Machine And Fabrication, Inc. | Fuel injector |
Family Cites Families (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5675955A (en) * | 1979-11-21 | 1981-06-23 | Nippon Denso Co Ltd | Solenoid type fuel injection valve |
| DE3943005A1 (de) * | 1988-12-28 | 1990-07-05 | Hitachi Ltd | Elektromagnetische einspritzventilvorrichtung |
| US4971254A (en) * | 1989-11-28 | 1990-11-20 | Siemens-Bendix Automotive Electronics L.P. | Thin orifice swirl injector nozzle |
| US5570841A (en) * | 1994-10-07 | 1996-11-05 | Siemens Automotive Corporation | Multiple disk swirl atomizer for fuel injector |
| FR2729091B1 (fr) * | 1995-01-11 | 1997-05-30 | Valois | Buse de pulverisation |
| JP3182057B2 (ja) * | 1995-04-28 | 2001-07-03 | 株式会社デンソー | 燃料噴射弁 |
| US5740777A (en) * | 1995-05-16 | 1998-04-21 | Mitsubishi Jidosha Kogyo Kabushiki Kaisha | In-cylinder injection internal combustion engine |
| US5642862A (en) * | 1995-07-28 | 1997-07-01 | Siemens Automotive Corporation | Fuel injection valve having a guide diaphragm and method for assembling |
| JP3329998B2 (ja) * | 1995-10-17 | 2002-09-30 | 三菱電機株式会社 | 筒内噴射用燃料噴射弁 |
| JP3473884B2 (ja) * | 1996-07-29 | 2003-12-08 | 三菱電機株式会社 | 燃料噴射弁 |
| JP3933739B2 (ja) * | 1997-01-30 | 2007-06-20 | 三菱電機株式会社 | 燃料噴射弁 |
| US5875972A (en) * | 1997-02-06 | 1999-03-02 | Siemens Automotive Corporation | Swirl generator in a fuel injector |
| US6024301A (en) * | 1998-10-16 | 2000-02-15 | Combustion Components Associates, Inc. | Low NOx liquid fuel oil atomizer spray plate and fabrication method thereof |
| US6065692A (en) * | 1999-06-09 | 2000-05-23 | Siemens Automotive Corporation | Valve seat subassembly for fuel injector |
-
1998
- 1998-01-20 FR FR9800554A patent/FR2773851B1/fr not_active Expired - Fee Related
-
1999
- 1999-01-18 BR BR9907103-7A patent/BR9907103A/pt not_active IP Right Cessation
- 1999-01-18 WO PCT/FR1999/000084 patent/WO1999036692A1/fr not_active Ceased
- 1999-01-18 US US09/600,555 patent/US6244525B1/en not_active Expired - Lifetime
- 1999-01-18 DE DE69901095T patent/DE69901095T2/de not_active Expired - Lifetime
- 1999-01-18 EP EP99900943A patent/EP1049870B1/fr not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| BR9907103A (pt) | 2000-12-05 |
| FR2773851B1 (fr) | 2000-03-24 |
| DE69901095D1 (de) | 2002-05-02 |
| EP1049870A1 (fr) | 2000-11-08 |
| FR2773851A1 (fr) | 1999-07-23 |
| US6244525B1 (en) | 2001-06-12 |
| WO1999036692A1 (fr) | 1999-07-22 |
| DE69901095T2 (de) | 2002-11-21 |
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