WO1999036692A1 - Injecteur de carburant pour moteur a combustion interne - Google Patents
Injecteur de carburant pour moteur a combustion interne Download PDFInfo
- Publication number
- WO1999036692A1 WO1999036692A1 PCT/FR1999/000084 FR9900084W WO9936692A1 WO 1999036692 A1 WO1999036692 A1 WO 1999036692A1 FR 9900084 W FR9900084 W FR 9900084W WO 9936692 A1 WO9936692 A1 WO 9936692A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- seat
- slots
- fuel
- needle
- guide
- Prior art date
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
- 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 fluid, and in particular liquid, state intended for injecting fuel directly into a combustion chamber of a spark-ignition engine. It is particularly applicable to petrol injection, but it can also be adapted to other liquid fuels, such as alcohol-based fuels and liquefied petroleum gas.
- injectors for direct injection having an injector body containing a needle displaceable axially by electrically controlled means (often constituted by a coil) and terminated by a closure element, often of hemispherical shape, cooperating with a seat. fuel passage.
- the needle can be moved between a first axial position where the closure element is supported on the seat and a position where it is spaced therefrom.
- the constraints imposed on the injector in the case of a direct injection are much higher than in the case of an indirect injection into the tubing. It is necessary both to limit the depth of penetration of the fuel jet, for example so as not to wet the walls of the chamber and to ensure as intimate a mixture of air and fuel as possible for better combustion, and this while the time allocated for fuel injection is very short. To obtain this result, attempts have already been made to give the fuel a vortex movement.
- the document WO-A-96/36808 describes an injector fulfilling this function. It includes a fuel rotation chamber around the axis of the closure element, located upstream of the seat so as to avoid the presence of a dead volume between the seat and the spray hole.
- the present invention aims in particular to provide a fuel injector which responds better than those previously known to the requirements of practice, in particular in that it causes the fuel to rotate using simple means, however very effective.
- the invention provides a fuel injector having a rotation chamber defined by the upstream face of the seat, by a disc applied to the seat and having slots opening tangentially in a central opening surrounding the element obturation and by a needle guide constituted so as to feed the external end of the slots.
- the vortex effect thus produced has several consequences.
- the swirling of the vaporized fluid which has passed through the diffusion hole which can be closed off by the obturation element improves the air-gasoline mixture and lengthens the path which would be necessary for the particles to reach the walls.
- the disc is advantageously pinched between the guide, pressing against an internal shoulder of the body, and the seat which is fixed to the body permanently, for example by welding.
- the fuel path to the slots may consist of a 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, makes it possible to center the latter.
- the radial clearance required for gentle friction is very reduced. It limits the passage of fluid, which improves the quality of the jet.
- the radial feed clearance can receive the fuel through grooves made in the upstream face of the guide, bearing against the internal shoulder.
- the disc will have from two to eight slots which may be rectilinear or have an angled bend so as to reinforce the rotation given by the opening of the slots in the central opening.
- FIG. 2 is an exploded perspective view of the lower part of the injector of Figure 1;
- FIG. 3 is an elevational view in half-section of the injector guide shown in Figures 1 and 2;
- FIG. 4 is a top view of the guide of Figure 3;
- FIG. 5 is a top view of a disc constituting an alternative embodiment of that shown in Figure 2;
- FIGS. 6 and 7 are detailed views showing a fragment of discs constituting variants of that of FIG. 2.
- the injector the general construction of which is shown in FIG. 1, comprises a body 10 made of several assembled parts, inside which is a needle 12 which can be moved axially by a coil 14. For this, the needle is fixed to a ring 16 in ferromagnetic material.
- the needle could as well be controlled 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 chamber 26 to which is fixed, generally by welding, a seat 28.
- a diffusion hole 30 into which opens a support zone of a shutter element.
- the seat 28 is fixed by a circular weld 32, produced by laser or by electron beam.
- the shutter element of the injector is constituted, in the illustrated case, by the end of the needle 12.
- the bearing on which the needle rests is for example of conical shape, while the end of the needle has, in its bearing areas, a shape of a spherical segment.
- the tip of the terminal part of the needle can be conical, to reduce the risk of cavitation.
- the coil 14 makes it possible to move the needle , against the action of the spring 34, within a limit fixed by the abutment of the ring 16 against a fixed sleeve 38, which can be made of ferro-magnetic material to 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 vortex generation disc 42, stacked in the recess 26 between the seat 28 and the shoulder 24.
- the guide 40 ( Figures 1 to 4) has a cylindrical side wall, of diameter slightly less 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 an annular passage for supplying fuel to the seat. To reduce friction, it may have a recess of the kind shown in dashes in FIG. 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 formed between the needle and the internal wall of the end portion 18 and by supply grooves 44, four in number in the case illustrated in FIGS. 2-4.
- the upstream face of the guide advantageously comprises chamfers.
- the disc 42 is constituted by a flat and thin piece, hollowed out to delimit a central cavity 46, of generally circular shape, into which tangentially open slots 48, four in number in the case illustrated in FIG. 2. The end The outside of these slots is placed so that the fuel which has passed through the annular clearance can arrive in the slots. A chamfer 50 may be provided on the downstream face of the guide 40 to allow this supply. The external diameter of the disc 42 is such that it is received with gentle friction in the recess 26.
- the cutouts of the disc 42 can take very diverse forms.
- the slots 48 are six in number. They have terminal enlargements 52 oriented to have several roles. They facilitate the entry of the fuel into the slots 48. They initiate the rotational movement of the fuel in the direction of the arrow f, by the bend which they represent.
- the slots have a throttle convergent 54 at their outlet in the central cavity 46.
- the invention is also applicable to injectors in which the closure means and / or the control means are different from those which have been described. In particular, it can be used when the closure element is constituted by 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)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE69901095T DE69901095T2 (de) | 1998-01-20 | 1999-01-18 | Kraftstoffeinspritzdüse für eine brennkraftmaschine |
US09/600,555 US6244525B1 (en) | 1998-01-20 | 1999-01-18 | Fuel injector for an internal combustion engine |
BR9907103-7A BR9907103A (pt) | 1998-01-20 | 1999-01-18 | Injetor de combustìvel para motor à combustão interna |
EP99900943A EP1049870B1 (fr) | 1998-01-20 | 1999-01-18 | Injecteur de carburant pour moteur a combustion interne |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9800554A FR2773851B1 (fr) | 1998-01-20 | 1998-01-20 | Injecteur de carburant pour moteur a combustion interne |
FR98/00554 | 1998-01-20 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1999036692A1 true WO1999036692A1 (fr) | 1999-07-22 |
Family
ID=9521943
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/FR1999/000084 WO1999036692A1 (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) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2001042976A1 (fr) * | 1999-12-07 | 2001-06-14 | Microsoft Corporation | Formatage de document base sur des valeurs de formatage optimisees |
Families Citing this family (19)
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 |
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 |
Citations (7)
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 |
US4971254A (en) * | 1989-11-28 | 1990-11-20 | Siemens-Bendix Automotive Electronics L.P. | Thin orifice swirl injector nozzle |
US5018501A (en) * | 1988-12-28 | 1991-05-28 | Hitachi, Ltd. | Electromagnetic fuel injection valve apparatus |
JPH08296531A (ja) * | 1995-04-28 | 1996-11-12 | Nippondenso Co Ltd | 燃料噴射弁 |
WO1996036808A1 (fr) * | 1995-05-16 | 1996-11-21 | Mitsubishi Jidosha Kogyo Kabushiki Kaisha | Moteur a combustion interne de type a injection dans le cylindre |
US5630400A (en) * | 1995-10-17 | 1997-05-20 | Mitsubishi Denki Kabushiki Kaisha | Fuel injection valve for an 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 |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
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 |
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 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 WO PCT/FR1999/000084 patent/WO1999036692A1/fr active IP Right Grant
- 1999-01-18 BR BR9907103-7A patent/BR9907103A/pt not_active IP Right Cessation
- 1999-01-18 EP EP99900943A patent/EP1049870B1/fr not_active Expired - Lifetime
Patent Citations (8)
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 |
US5018501A (en) * | 1988-12-28 | 1991-05-28 | Hitachi, Ltd. | Electromagnetic fuel injection valve apparatus |
US4971254A (en) * | 1989-11-28 | 1990-11-20 | Siemens-Bendix Automotive Electronics L.P. | Thin orifice swirl injector nozzle |
JPH08296531A (ja) * | 1995-04-28 | 1996-11-12 | Nippondenso Co Ltd | 燃料噴射弁 |
WO1996036808A1 (fr) * | 1995-05-16 | 1996-11-21 | Mitsubishi Jidosha Kogyo Kabushiki Kaisha | Moteur a combustion interne de type a injection dans le cylindre |
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 |
US5630400A (en) * | 1995-10-17 | 1997-05-20 | Mitsubishi Denki Kabushiki Kaisha | Fuel injection valve for an internal combustion engine |
Non-Patent Citations (2)
Title |
---|
PATENT ABSTRACTS OF JAPAN vol. 005, no. 143 (M - 087) 9 September 1981 (1981-09-09) * |
PATENT ABSTRACTS OF JAPAN vol. 097, no. 003 31 March 1997 (1997-03-31) * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2001042976A1 (fr) * | 1999-12-07 | 2001-06-14 | Microsoft Corporation | Formatage de document base sur des valeurs de formatage optimisees |
Also Published As
Publication number | Publication date |
---|---|
FR2773851A1 (fr) | 1999-07-23 |
FR2773851B1 (fr) | 2000-03-24 |
BR9907103A (pt) | 2000-12-05 |
DE69901095T2 (de) | 2002-11-21 |
EP1049870A1 (fr) | 2000-11-08 |
US6244525B1 (en) | 2001-06-12 |
EP1049870B1 (fr) | 2002-03-27 |
DE69901095D1 (de) | 2002-05-02 |
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