EP4004360A1 - Méthode de réalisation d'un ensemble combiné de filtration et de calibration - Google Patents
Méthode de réalisation d'un ensemble combiné de filtration et de calibrationInfo
- Publication number
- EP4004360A1 EP4004360A1 EP20742270.0A EP20742270A EP4004360A1 EP 4004360 A1 EP4004360 A1 EP 4004360A1 EP 20742270 A EP20742270 A EP 20742270A EP 4004360 A1 EP4004360 A1 EP 4004360A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- calibration
- injector
- combined filtration
- assembly
- calibration assembly
- 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
Classifications
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- 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
- F02M61/165—Filtering elements specially adapted in fuel inlets to injector
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- 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
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- 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
- F02M2200/27—Fuel-injection apparatus with filters
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- 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
- F02M2200/28—Details of throttles in fuel-injection apparatus
-
- 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
- F02M2200/50—Arrangements of springs for valves used in fuel injectors or fuel injection pumps
- F02M2200/505—Adjusting spring tension by sliding spring seats
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- 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
- F02M2200/80—Fuel injection apparatus manufacture, repair or assembly
- F02M2200/8053—Fuel injection apparatus manufacture, repair or assembly involving mechanical deformation of the apparatus or parts thereof
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- 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
- F02M51/0685—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 and the valve being allowed to move relatively to each other or not being attached to each other
Definitions
- the present invention relates to a fuel injector and in particular to a fuel injector intended for direct injection of gasoline into the combustion chamber of an internal combustion engine.
- Direct injection gasoline engines require fuel injectors to operate under extreme conditions of temperature and pressure. Further, the fuel injector must open and close very quickly in order to provide the multi-pulse injection cycles necessary for fuel efficiency and low emissions.
- the piezoelectric actuator can provide a high opening force to overcome the needle return spring required to keep the valve closed and the high hydraulic forces generated during high pressure operation of the injector.
- the piezoelectric actuator also provides rapid opening of the valve and can realize a variable valve.
- piezoelectric fuel injectors are very expensive to produce compared to solenoid actuated injectors and require complex and expensive control systems for piezoelectric actuator operation.
- solenoid actuated fuel injectors cannot provide the same level of performance as devices actuated by piezoelectric devices, mainly due to the opening force. lower achievable by electromagnetic solenoid actuators and slower increase in force over time.
- armature spring is a return spring which is arranged above an armature.
- the position of the armature spring is not optimized as it reduces the air gap between the armature and the pole piece and thus reduces the magnetic force available to attract the armature.
- the injector 10 comprises an electromagnetic actuator 12, a body 14, a needle 16 comprising an integral ball 18, a calibration spring 20 and an armature spring 22.
- the electromagnetic actuator 12 comprises a fixed coil 24, a pole piece 26 and an armature 28.
- the method of operation of G injector 10 not shown comprises:
- the injector 10 further comprises a stop ring 30, a calibration sleeve 32 and a filter 34.
- the assembly of the various parts of the injector 10 in production is complex and generates rejects during assembly, in particular of a stop ring 30.
- the insertion of the stop ring 30 and the calibration sleeve 32 generate particles which are sources of degradation of injection in operation.
- Filter 34 is plastic or stainless steel mesh.
- the filter 34 is mounted at the end of the assembly line of the injector 10 and therefore the generation of particles upstream cannot be prevented.
- the object of the present invention is to provide a solution which will alleviate the problem mentioned above.
- the present invention aims to remedy the drawbacks mentioned above by proposing a simple and economical solution which aims to reduce the number of assembled parts by producing a single part which integrates the calibration sleeve, the stop ring and the filter.
- the invention consists of a combined assembly for filtration and calibration of a fuel injector arranged in an internal combustion engine.
- the combined filtration and calibration assembly extends along a longitudinal axis.
- the combined filtration and calibration set includes a calibration sleeve with a longitudinal bore as well as a multitude of filter holes.
- the combined filtration and calibration assembly has a calibrated orifice in the bore.
- the calibrated orifice is produced by rolling.
- the calibrated orifice is a circular plate provided in its center with a calibrated hole
- a method of producing a combined filtration and calibration assembly comprises the following production steps:
- a production method includes the following production steps:
- a fuel injector comprises a combined filtration and calibration assembly as described above.
- Figure 1 is a sectional view of a prior art injector.
- Figure 2 is a sectional view of an injector of the prior art
- Figure 3 is a sectional view of an injector according to the invention.
- Figure 4 is a sectional view of a combined filtration and calibration assembly according to the invention
- Figure 5 is a sectional view of an injector named GDI M14 according to the invention
- Figure 6 is a sectional view of an injector named GDI M12 according to the invention
- Figure 7 is a sectional view of the step-by-step construction of the combined filtration and calibration assembly according to the invention.
- the invention relates to a fuel injector 110 for an internal combustion engine, here the injector 110 is a gasoline injector.
- the injector 110 is a gasoline injector.
- the description will detail the elements of the invention and will remain more succinct and general as to the surrounding elements.
- the injector 110 extends along a longitudinal axis X.
- the injector 110 is a gasoline injector for an internal combustion engine.
- the injector 110 comprises an electromagnetic actuator 112, a body 114, a needle 116 with a ball 118 integral with the needle 116 a calibration spring 120 and an armature spring 122 and a combined filtration and calibration assembly 130.
- the body 114 of the injector 110 includes an open upper end and a lower end with an injection nozzle. Body 114 extends along the X axis.
- the electromagnetic actuator 112 includes a fixed annular coil 124, a fixed pole piece 126, and a frame 128.
- the movable frame 128 is provided with an axial hole within which the needle 116 is axially slidably guided.
- the needle 116 is axially movable in the body 114 between a closed position and an open position of the injection nozzle.
- the needle 116 includes a first end arranged with the ball 118 and a second end arranged close to the pole piece 126.
- the armature spring 122 is attached on the one hand to the armature 128 and on the other hand to the needle 116.
- the armature spring 122 is a tension spring with coils contiguous at its ends.
- the frame spring 122 is a return spring.
- the combined filtration and calibration assembly 130 of the injector 110 extends along the longitudinal axis X.
- the combined filtration and calibration assembly 130 further comprises a lower face 132 and an upper face 134.
- the lower face 132 and upper face 134 can be used as an adjustment face for the calibration spring 120.
- the combined filtration and calibration assembly 130 includes a calibration sleeve provided with a longitudinal bore. and provided with a multitude of filtration holes 136.
- the combined filtration and calibration assembly 130 has a calibrated orifice 138 in the bore.
- the calibrated orifice 138 is a circular plate provided at its center with a calibrated hole. opening on both sides. The circular plate is arranged in the bore of the combined filter and calibration assembly 130.
- the combined filter and calibration assembly 130 includes a filter section 140 including the filter holes 136 laser drilled in the body of the filter. 'a stamped part.
- a fuel flow 144 which indicates the direction of fuel flow in the injector 110 said type GDI M14 and a fuel flow 146 indicating the circulation of fuel in the injector 110 said to be of the GDI M16 type.
- the injector 110 named GDI M14.
- the combined filtration and calibration assembly 130 is mounted with the lower face 132 facing downward and arranged against the calibration spring 120 while the upper face 134 faces upward.
- the combined filtration and calibration assembly 130 is mounted tightly in an upper part of the injector 110.
- the injector 110 named GDI M12 or GDI M16.
- the combined filtration and calibration assembly 130 is mounted upside down with respect to the assembly of the injector 110 described in FIG. 5.
- the upper face 134 is arranged against the calibration spring 120 while the lower face 132 is arranged in the upper part of the injector 110.
- the combined filtration and calibration assembly 130 is mounted tightly in a lower part of the injector 130, on the calibration spring 120 side.
- the filter section 140 including the laser drilled filter holes 136 can be set to an equivalent 138 calibrated orifice size.
- the calibrated orifice 138 is used for fuel flow by managing pressure drop and pressure waves.
- the diameter of the filter hole 136 is between 20 ⁇ m and 25 ⁇ m and the number of filter holes ranges from 600 to 2800 filter holes 136 required for the calibrated orifice 138 equivalent to 0.7 mm in diameter.
- the calibrated orifice 138 may be an add-on or an integrated feature created from a restriction 142 of the body of the combined filter and calibration assembly 130.
- the advantage is a quiescent volume is created for the retention of particles, thus minimizing the risk of clogging of the filter section 140.
- the body of the combined filter and calibration assembly 130 should be made of stainless steel with the possibility of adding a surface hardening process to strengthen the filter. component but also to avoid seizures during its insertion into the injector 110.
- - fuel injector 110 is calibrated with calibrated orifice 138 reducing error if using an orifice plate after calibration.
- the method of making the combined filtration and calibration assembly 130 of the invention as described above comprises the stages of production is:
- step A roll a tube or deform a plate into a tube
- step C roll the calibrated orifice 138
- step B insert a circular plate into the tube and crimp the circular plate
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)
- Manufacturing & Machinery (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR1908332A FR3099211B1 (fr) | 2019-07-23 | 2019-07-23 | Ensemble combiné de filtration et de calibration |
| PCT/EP2020/070650 WO2021013879A1 (fr) | 2019-07-23 | 2020-07-22 | Méthode de réalisation d'un ensemble combiné de filtration et de calibration |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4004360A1 true EP4004360A1 (fr) | 2022-06-01 |
Family
ID=69190846
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP20742270.0A Pending EP4004360A1 (fr) | 2019-07-23 | 2020-07-22 | Méthode de réalisation d'un ensemble combiné de filtration et de calibration |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US12421926B2 (fr) |
| EP (1) | EP4004360A1 (fr) |
| CN (1) | CN114174669B (fr) |
| FR (1) | FR3099211B1 (fr) |
| WO (1) | WO2021013879A1 (fr) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1219818A1 (fr) * | 2000-12-29 | 2002-07-03 | Siemens Automotive Corporation | Injecteur modulaire de combustible ayant un actuateur électromagnétique et un raccord terminal interconnectant l'actuateur électromagnétique avec une borne électrique |
| EP3034857A1 (fr) * | 2014-12-16 | 2016-06-22 | Robert Bosch Gmbh | Soupape d'injection de combustible |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10232691B4 (de) * | 2002-07-18 | 2006-04-13 | Volkswagen Mechatronic Gmbh & Co. Kg | Pumpe-Düse-Einheit |
| DE102005033157B4 (de) * | 2005-07-13 | 2013-10-31 | Benteler Automobiltechnik Gmbh | Anschluss einer Leitung unter Einbringung einer Drossel an eine Kraftstoffverteilerleiste und Verfahren zur Herstellung eines solchen Anschlusses |
| EP1783356B1 (fr) | 2005-11-02 | 2007-10-31 | Delphi Technologies, Inc. | Soupape d'injection de carburant |
| JP5152005B2 (ja) * | 2009-01-21 | 2013-02-27 | 株式会社デンソー | フィルタ装置および燃料噴射装置 |
| JPWO2010119896A1 (ja) * | 2009-04-15 | 2012-10-22 | 臼井国際産業株式会社 | ディーゼルエンジン用燃料噴射管 |
| IT1404742B1 (it) * | 2010-12-20 | 2013-11-29 | Ufi Innovation Ct Srl | Metodo di dimensionamento di un gruppo filtrante per motori a combustione interna e relativo gruppo filtrante |
| EP2811151A1 (fr) * | 2013-06-04 | 2014-12-10 | Continental Automotive GmbH | Filtre pour soupape d'injection de carburant, soupape d'injection de carburant et procédé de fabrication d'un filtre destiné à une soupape d'injection de carburant |
| EP2949917B1 (fr) * | 2014-05-27 | 2017-01-04 | Continental Automotive GmbH | Injecteur à carburant |
| DE102015226528A1 (de) * | 2015-12-22 | 2017-06-22 | Robert Bosch Gmbh | Brennstoffeinspritzventil |
| EP3279462B8 (fr) * | 2016-08-04 | 2020-06-17 | Vitesco Technologies GmbH | Ensemble filtre pour une soupape d'injection, ensemble de soupapes et soupape d'injection |
-
2019
- 2019-07-23 FR FR1908332A patent/FR3099211B1/fr active Active
-
2020
- 2020-07-22 US US17/629,010 patent/US12421926B2/en active Active
- 2020-07-22 CN CN202080052907.6A patent/CN114174669B/zh active Active
- 2020-07-22 EP EP20742270.0A patent/EP4004360A1/fr active Pending
- 2020-07-22 WO PCT/EP2020/070650 patent/WO2021013879A1/fr not_active Ceased
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1219818A1 (fr) * | 2000-12-29 | 2002-07-03 | Siemens Automotive Corporation | Injecteur modulaire de combustible ayant un actuateur électromagnétique et un raccord terminal interconnectant l'actuateur électromagnétique avec une borne électrique |
| EP3034857A1 (fr) * | 2014-12-16 | 2016-06-22 | Robert Bosch Gmbh | Soupape d'injection de combustible |
Non-Patent Citations (1)
| Title |
|---|
| See also references of WO2021013879A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114174669B (zh) | 2023-12-01 |
| US12421926B2 (en) | 2025-09-23 |
| FR3099211A1 (fr) | 2021-01-29 |
| US20220268247A1 (en) | 2022-08-25 |
| WO2021013879A1 (fr) | 2021-01-28 |
| FR3099211B1 (fr) | 2022-08-26 |
| CN114174669A (zh) | 2022-03-11 |
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