EP0438479A1 - Electromagnetic fuel injector in cartridge design. - Google Patents
Electromagnetic fuel injector in cartridge design.Info
- Publication number
- EP0438479A1 EP0438479A1 EP19890911706 EP89911706A EP0438479A1 EP 0438479 A1 EP0438479 A1 EP 0438479A1 EP 19890911706 EP19890911706 EP 19890911706 EP 89911706 A EP89911706 A EP 89911706A EP 0438479 A1 EP0438479 A1 EP 0438479A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- fuel injector
- valve
- injector according
- armature
- electromagnetic fuel
- 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.)
- Granted
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
- F02M51/00—Fuel-injection apparatus characterised by being operated electrically
- F02M51/005—Arrangement of electrical wires and connections, e.g. wire harness, sockets, plugs; Arrangement of electronic control circuits in or on 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
- 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
- F02M51/0614—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of electromagnets or fixed armature
-
- 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
- F02M51/0614—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of electromagnets or fixed armature
- F02M51/0617—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of electromagnets or fixed armature having two or more electromagnets
- F02M51/0621—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of electromagnets or fixed armature having two or more electromagnets acting on one mobile armature
-
- 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
- F02M51/0632—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a spherically or partly spherically shaped armature, e.g. acting as valve body
-
- 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
-
- 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
- F02M51/0689—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means and permanent magnets
- F02M51/0692—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means and permanent magnets as valve or armature return means
-
- 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
- F02M51/08—Injectors peculiar thereto with means directly operating the valve needle specially for low-pressure fuel-injection
-
- 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
- F02M61/08—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 the valves opening in direction of fuel flow
-
- 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
Definitions
- valves typically are of axially symmetric design.
- the armature of such valves is located at the central axis of the valve and acts on a valve obturator which in most cases is of needle-type design.
- the outside diameter of these valves is in general 20-25 mm.
- Magnetic return flow usually is by means of a massive metallic housing which provides the base for both the magnetic pole and the valve seat. This housing must be precision made to prevent unacceptable dislocations of the magnetic pole. Usually this results in a series of narrowly defined precision tolerance limits which are difficult to achieve in production, or it is necessary to select component parts which fit precisely to each other.
- the conventional injectors feature only very small stroke heights.
- the fuel injector according to the instant invention in variance from state of the art designs, features a non-magnetizable casing which is solidly joined with the magnet pole and the valve seat, and serves as the radial guidance element of the armature.
- the casing together with the components contained therein, forms a cartridge which is mounted inside the valve housing.
- Functional testing of the cartridge can be done independent from the other mounting parts during an early manufacturing stage. This simplifies manufacture of the total valve considerably, rejects are reduced. Loss of a complete valve in case of possible performance problems is thus avoided. Furthermore, no seals are required inside the cartridge.
- the injector housing is predominately plastic material, therefore inexpensive to manufacture.
- the fuel injector has small overall dimensions, the external diameter in general is 14-16 mm. The valve is therefore readily adapted to the most varied mounting conditions.
- the bearing for magnet pole 103 is provided by the non-magnetizable casing 101, which also serves as the radial guidance element of armature 106. Inside armature 106 provision is made for reset spring 108. Armature 106 terminates in cone-shaped obturator 110. Casing 101 also contains valve seat 111 and nozzles 112. Casing 101, magnet pole 103, armature 106, and valve seat 111, which is inside the casing, jointly form a cartridge which can be manufactured independently from parts which are extraneous to the cartridge. Fuel delivery to the valve seat is via side orifice 102 in the casing. The valve seat region is sealed against the valve housing, which is not drawn, by means of gasket ring 113.
- Fig. 1 offers many additional advantages over state of the art valves which are not directly obvious.
- the cartridge design of the valve makes it possible to carry out initial performance testing during early manufacturing stages.
- valve features several special features with respect to magnetic characteristics.
- Magnetic return flow is via slide-on bracket 104.
- Bracket 104 is open on one side, only partially enclosing magnet coil 107 at its outer perimeter. This results in an increase of magnetic resistance between the parts of the magnetic circuit which are inside the magnetic coil (magnet pole and armature) , and the section which is outside the magnetic circuit (bracket) . Thereby the stray field of the magnetic circuit is reduced, resulting in greater effectiveness of the electric energy conversion.
- several additional gaps are provided, approximately evenly distributed in the flow of the magnetic field lines.
- the special feature connected with this valve is found in the additional permanent air gap 105, which serves for dynamic calibration.
- a change in air gap 105 causes a change in the magnetic resistance of the magnetic circuit.
- Enlarging air gap 105 causes a delay in pickup and a decrease in drop off. This allows calibration of the dynamic flow characteristics by setting air gap 105 to desired values.
- Magnetic coil 107 is slipped sidewise into bracket 104.
- Bracket 104 can be thin-walled, since it has no load bearing function with respect to magnetic pole 103.
- state of the art valves require rather thick-walled housings to prevent unacceptable dislocations of the magnetic pole.
- magnetic coil 107 is only partially enveloped, it can readily be embedded in plastic, together with the contact pins. This prevents possible leakage paths, and the heat transmission of the coil is improved. The reject losses often incurred during the manufacturing process are reliably precluded. The result is a stable and compact housing design, inside of which the cartridge valve is well protected from mechanical damage.
- valve exhibits some special features with respect to hydraulic design.
- reset spring 108 is positioned in a chamber 116 which is open at one end and is located inside of armature 106.
- Annular pole surface 117 of armature 106 features engraved hydraulic damping slots which attenuate armature movement and permit fuel to flow into chamber 116 even while the armature is in the closed position. This prevents hydraulic sticking of armature 106 at magnet pole 103.
- the damping slots are arranged in such a manner that between them three contact areas result which are distributed evenly around the circumference of the armature pole surface. The contact surfaces should extend radially over the total width of annular pole area 117. Chamber 116 enhances the damping effects of the hydraulic damping slots.
- the depth of the slots should be about 10-20 micrometers. At this depth, good hydraulic damping of the closing movement of the armature is obtained, without also resulting in unacceptable damping of the reset step. Because of hydraulic damping in working gap 114, relatively soft material can be used in this region without resulting in unacceptable wear.
- the design of the hydraulic damping gaps in particular is described in a separate application (Electromagnetic Injector and Procedures for its Manufacture) .
- the radial play of the obturator is set in such a way that for the energized armature a permanent pressure drop of about 10-20% of the static fuel pressure is produced behind the annular gap.
- the diameter of the annular gap should be chosen to be 2-3 times larger than that of valve seat 111.
- the obturator is hydraulically centered, and impacting of the obturator onto the valve seat is dampened.
- the employment of hardened materials for both obturator and valve seat does not have to be considered for the dimensions stated. By dampening the reset movement, armature bounce is significantly reduced.
- the obturator also features a groove 118, which serves to increase the permanent pressure drop and to uniformly distribute the • pressure drop around the perimeter of the annular gap.
- valve seat 111 The hydraulic reset feature and the defined steady state characteristics are especially useful for multipoint injection where each motor cylinder is separately supplied with fuel by an individual injector.
- Multipoint injection requires only a minimal amount of fuel flow which can be achieved already with a small diameter of valve seat 111.
- Valve seat diameters in general need not be larger than 1-2 mm. The stated dimensions can thus be implemented already for an obturator diameter of 3-4 mm.
- armature 201 On the face surface of armature 201 a circumferential damping slot 231 is provided, which attenuates armature movement. This damping slot additionally results in hydraulic parallel guidance of the armature. Based on this hydraulic parallel guidance, the flow conditions at valve seat 207 are easily reproducible without requiring radial guidance for the valve needle in
- annular channel 232 results in a floating mounting arrangement for the cartridge valve, so that virtually no radial forces from housing 222 can be exerted on the cartridge valve.
- fuel reaches the upper housing region via passages 218, 219, and 220. From there, the fuel proceeds via orifice 226 into circumferential annular channel 227, and from there to fuel recycle.
- Housing 222 is sealed in the mounting hole by means of gasket rings 211 and 224.
- the cartridge valve is sealed against the housing by means of gasket ring 226, which is located on valve carrier 203.
- Housing 222 is surro ⁇ nded by a fuel filter, which has not been drawn.
- Dynamic calibration of the valve is achieved by changing the axial location of the cartridge valve with respect to housing 222. Positioning is done by threading the cartridge to a given depth. As the exact location of the cartridge changes, the relative locations of the working pole in relation to the magnetic coil, and the overlapping in the area of side-gaps 214 and 215 is changed. During this positioning process, two magnetic parameters are being used for calibration: on the one hand a change in the stray field, by the relative positions of working pole and magnetic coil, on the other hand a change in magnetic resistance by the changes in the overlap of the side-gaps. In this case, the radial arrangement of upper gap 215, in comparison with the axial arrangement of calibration gap 105 in Fig. 1, results in lower sensitivity. Thus, in order to obtain an equivalent change in dynamic calibration, the design according to
- FIG. 3 A further advantageous design of armature and valve needle, with respect to magnetic principles and kinematic concerns, is shown in Fig. 3.
- This type of armature design is preferably used for valves of the type described in Fig. 2.
- tubular armature 302 is directly pressed onto valve needle 301; the armature seals against pole 304 with closing pin 303.
- the diameter of valve needle 301 is about 2 mm.
- Closing pin 303 has a diameter of about 1 mm.
- the reset spring is inside armature 302, mounted on closing pin 303. Armature 302 is pressed onto valve needle 301 and further secured against dislocations by welding bead 309.
- the contact surface of closing pin 303 extends about 20 micrometers beyond pole surface 307, resulting in an annular damping slot in the pole region.
- the advantage of the design according to Fig. 3 is to be found in exceptionally effective damping of the closing movement of the armature with only minimal hydraulic sticking. This damping effect is obtained by displacement of fluid from the annular chamber 310, located inside the armature, which results in an especially strong damping effect. Because of the very small closing surface of pin 303, hydraulic sticking is prevented. In addition, it is of advantage that no limit stop is present in the working pole area, in contrast to the design in Fig. 2. This results in a faster decay of the magnetic field after cutting off the energizing current.
- Fig. 4 describes a valve of especially small dimensions, equipped with a ball armature.
- Armature diameter is preferably about 2.5-3 mm.
- Housing diameter is about 14 mm.
- Magnetic features are those of the valve design according to Fig. 1.
- the magnetic circuit of the valve consists of armature 412, magnetic pole 408, and bracket 402.
- the working gap of the magnetic circuit is located about in the middle of the coil.
- Around armature 412 an additional side-pole is arranged. Two different designs are represented: in the right half of the drawing, side-pole 417 has been pressed onto non-magnetizable casing 423. This approach is inexpensive, but less advantageous from magnetic considerations.
- Valve needle 513 is radially guided inside valve carrier 510.
- Valve carrier 510 also contains nozzle plate 512 which is clamp-fastened by diffuser 511.
- Valve carrier 510 is threaded into pole fixture 509.
- Non-magnetizable casing 507 is pressed onto valve carrier
- Fuel supply is via orifices 519 in the lower section of housing 501. Fuel passes then through slanted channels
- Assembly of permanent magnet 508 can be done in the unmagnetized state in order to facilitate handling.
- Permanent magnet 508 is then magnetized by the externally applied magnetic field.
- Fig. 6 describes another valve where armature reset is by means of a permanent magnet.
- an additional magnetic coil- 610 has been installed near the permanent magnet.
- the valve features two magnetic circuits with opposing magnetic fields.
- permanent magnet 607 is positioned on one side only, resulting in a mono-stable behavior mode.
- Mono-stable behavior is characterized by the fact that the valve returns automatically to the closed position as the energizing current is cut, without requiring an electrical counter pulse.
- Mono-stable behavior is a safety requirement for injector valves, so that closing of the valve is guaranteed even for possible- service interruptions of the electric triggering circuits.
- the cartridge design of the injector in line with the present invention, allows for an especially simple and cost effective construction of the magnetic circuit. For comparable dynamic behavior, electric energy consumption is considerably less than for state of the art valves.
- All segments of magnetic circuits consist of magnetically soft material.
- a strong magnetic field establishes itself between armature 605 and rest-pole 606, this field acts toward closing of the valve.
- permanent air gap 627 which is also designed as a hydraulic damping slot.
- the resting-gap 626 should preferably have a length of about 20 micrometers, it may also be longer for practical reasons. Armature diameter should be about 4 mm.
- the magnetic circuits are connected in such a way that for the energized state the magnetic field of the upper coil 609 is co-directional with the field of the permanent magnet, while that of the lower coil 610 is opposed to the field of the permanent magnet.
- Armature 605 is pressed onto valve needle 630 and can additionally be welded to same.
- Valve needle 630 is radially guided inside rest-pole 606.
- Rest-pole 606 is pressed into valve carrier 616 and welded to it.
- Resting-gap 626 can be set by pressing rest-pole 606 to the corresponding depth into valve carrier 616.
- the non-magnetizable casing 613 is fastened onto rest-pole 606 and provides the mounting base for working pole 604.
- Working pole 604 contains damping passages 621 which provide fuel entry and exit to the armature region.
- the outer sections of the magnetic circuit, together with contact pins 602 and the magnet coils, are completely embedded in injection-moulded plastic during manufacture of the housing.
- the electromagnetic circuit of the valve consists of magnetic pole 708, armature 710, return flow bracket 704 and pole fixture 707.
- the armature diameter is about 2.5-3 mm.
- the electromagnetic circuit encloses magnetic coil 709.
- the permanent magnetic circuit is connected parallel to the electromagnetic circuit.
- the permanent magnetic circuit consists of permanent magnet 706, pole fixture 707, bracket 704 and the magnetically effective side air gap 724. Side air gap 724 is necessary to prevent a permanent weakening of the permanent magnetic field under the influence of the electromagnetic field.
- armature 710 is pulled in the direction of magnetic pole 708, being under the influence of the parallel connected permanent magnetic field. Armature 710, together with valve needle 711, jointly form a valve pin.
- the valve pin features guide noses 726, proportioning slot 721, and obturator 725. It is indicated to surface-harden the valve pin by nitration, or otherwise provide it with an anti-wear coating.
- the valve pin may also be equipped with a separate armature 720, which is pressed on, as shown in the left half of the drawing. Separate arrangements for armature and valve pin allows for use of an armature consisting of soft material. For assembly, the valve pin is inserted from below into the receiving cavity 727, side spacer 716 prevents the pin from falling out. For the
- the central fuel connector can also be directly attached to the magnetic pole, however, this results in higher mechanical loads on the cartridge valve. It is therefore advantageous, even for the case of a central fuel connector, to connect it directly to the valve housing in order to reduce mechanical loading on the cartridge.
- the non-magnetizable casing of the cartridge can be made thin-walled with less than 0.2 mm wall thickness. To design the casing with as thin a wall as possible is of advantage from a magnetic perspective.
- the proposed dimensions and methods of connecting are to be considered as suitable, but only as examples. For instance, in place of press-connections, threaded connections could be employed.
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)
- Magnetically Actuated Valves (AREA)
Abstract
Injecteur électromagnétique ultra rapide de carburant se présentant sous la forme d'une cartouche pour l'injection de carburant dans le collecteur d'admission d'un moteur à combustion interne. Le pôle magnétique de la soupape est monté sur une structure non magnétisable fermement reliée à un siège de soupape. Cette structure, avec l'induit, le pôle magnétique, et le siège de soupape, forme une cartouche pouvant être fabriquée indépendamment des autres éléments de soupape. La cartouche est intégrée dans un logement de soupape essentiellement composé de matière plastique. C'est pourquoi ledit injecteur de carburant peut être fabriqué à faible coût. De plus, on peut doter la soupape d'un circuit magnétique polarisé monostable.Electromagnetic ultra fast fuel injector in the form of a cartridge for injecting fuel into the intake manifold of an internal combustion engine. The magnetic pole of the valve is mounted on a non-magnetizable structure firmly connected to a valve seat. This structure, with the armature, the magnetic pole, and the valve seat, forms a cartridge that can be manufactured independently of the other valve elements. The cartridge is integrated in a valve housing essentially made of plastic. This is why said fuel injector can be manufactured at low cost. In addition, the valve can be fitted with a monostable polarized magnetic circuit.
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE3834446 | 1988-10-10 | ||
DE3834446A DE3834446A1 (en) | 1988-10-10 | 1988-10-10 | ELECTROMAGNETIC INJECTION VALVE IN CARTRIDGE DESIGN |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0438479A1 true EP0438479A1 (en) | 1991-07-31 |
EP0438479B1 EP0438479B1 (en) | 1994-02-16 |
Family
ID=6364779
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP89911706A Expired - Lifetime EP0438479B1 (en) | 1988-10-10 | 1989-10-10 | Electromagnetic fuel injector in cartridge design |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP0438479B1 (en) |
JP (1) | JPH04502947A (en) |
KR (1) | KR960010294B1 (en) |
DE (2) | DE3834446A1 (en) |
WO (1) | WO1990004098A1 (en) |
Families Citing this family (14)
Publication number | Priority date | Publication date | Assignee | Title |
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US5307991A (en) * | 1990-10-09 | 1994-05-03 | Ford Motor Company | Fuel injector and method of manufacturing |
US5372313A (en) * | 1993-02-16 | 1994-12-13 | Siemens Automotive L.P. | Fuel injector |
WO1994019600A1 (en) * | 1993-02-16 | 1994-09-01 | Siemens Automotive Corporation | Fuel injector |
JP2660388B2 (en) * | 1993-12-29 | 1997-10-08 | 株式会社ケーヒン | Electromagnetic fuel injection valve |
DE19544257B4 (en) * | 1995-11-28 | 2012-10-04 | Robert Bosch Gmbh | Electromagnetically actuated valve for hydraulic brake systems of motor vehicles |
DE19547406B4 (en) * | 1995-12-19 | 2007-10-31 | Robert Bosch Gmbh | Fuel injector |
DE19607013C2 (en) * | 1996-02-24 | 1998-01-22 | Bosch Gmbh Robert | Internal combustion engines with a valve body made of plastic |
DE19631280A1 (en) * | 1996-08-02 | 1998-02-05 | Bosch Gmbh Robert | Fuel injector and manufacturing method |
DE10136808A1 (en) * | 2001-07-27 | 2003-02-13 | Bosch Gmbh Robert | IC engine fuel injection valve, has magnetic coils and two cooperating armatures with respective positioning springs between latter and valve needle flanges |
DE602007005934D1 (en) * | 2007-04-30 | 2010-05-27 | Magneti Marelli Spa | Fuel injection valve with outwardly opening valve |
DE102009045348A1 (en) * | 2009-10-06 | 2011-04-07 | Robert Bosch Gmbh | Fuel injection valve and its manufacture |
EP2589786A1 (en) * | 2011-11-04 | 2013-05-08 | Continental Automotive GmbH | Valve assembly for a control valve and control valve |
DE102015221465A1 (en) * | 2015-11-03 | 2017-05-04 | Continental Teves Ag & Co. Ohg | Electromagnetic valve, in particular for slip-controlled motor vehicle brake systems |
DE102019201507A1 (en) * | 2019-02-06 | 2020-08-06 | Robert Bosch Gmbh | Injector with improved corrosion protection |
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DE1249043B (en) * | 1967-08-31 | CONCORDIA Maschinen- und Elektnzitatsgesellschaft mbH, Stuttgart | Electromagnetically operated valve | |
DE1072428B (en) * | 1956-11-16 | 1959-12-31 | Bendix Aviation Corporation New York N Y (V St A) | urtis A Hartman Elmira N Y (V St A) I Procedure for the workshop setting of electromagnetically actuated injection valves intended for internal combustion engines |
US3245652A (en) * | 1962-12-21 | 1966-04-12 | Gabb Special Products Inc | Valve |
DE1919702A1 (en) * | 1969-04-18 | 1970-11-26 | Bosch Gmbh Robert | Method for reducing the response time of solenoid valves |
DE2010079A1 (en) * | 1970-03-04 | 1971-09-30 | Rausch & Pausch | magnetic valve |
US3731881A (en) * | 1972-02-24 | 1973-05-08 | Bowmar Instrument Corp | Solenoid valve with nozzle |
DE2222448A1 (en) * | 1972-05-08 | 1973-11-22 | Teves Gmbh Alfred | ELECTROMAGNETIC VALVE |
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DE2458728A1 (en) * | 1974-12-12 | 1976-06-24 | Bosch Gmbh Robert | ELECTROMAGNETICALLY ACTIVATED INJECTION VALVE |
DE2501283A1 (en) * | 1975-01-15 | 1976-07-22 | Bosch Gmbh Robert | INJECTION VALVE |
GB1552419A (en) * | 1975-08-20 | 1979-09-12 | Plessey Co Ltd | Fuel injection system |
DE2548774A1 (en) * | 1975-10-31 | 1977-05-05 | Bosch Gmbh Robert | ELECTROMAGNETIC VALVE |
JPS54151728A (en) * | 1978-05-22 | 1979-11-29 | Diesel Kiki Co Ltd | Method of manufacturing fuel injection valve for electronic fuel injection device |
FR2427536A1 (en) * | 1978-05-30 | 1979-12-28 | Thomson Csf | BISTABLE SOLENOID VALVE CONTAINING A PERMANENT MAGNET |
US4245789A (en) * | 1979-05-03 | 1981-01-20 | General Motors Corporation | Electromagnetic fuel injector |
US4254653A (en) * | 1980-01-11 | 1981-03-10 | The Bendix Corporation | Electromagnetic fuel injector calibration |
DE3019418A1 (en) * | 1980-05-21 | 1981-11-26 | Hosiden Electronics Co | Double-coil self-holding solenoid - has fixed and moving armature with shaped interlocking ends and incorporates permanent magnet |
DE3105233A1 (en) * | 1981-02-13 | 1982-09-09 | Eks Elektromagnetik Dr. Scheuerer Kg, 7143 Vaihingen | Pressure-tight capsule for a valve magnet |
DE3110251A1 (en) * | 1981-03-17 | 1982-10-07 | Knorr-Bremse GmbH, 8000 München | Electromagnet |
JPH0134326Y2 (en) * | 1981-04-22 | 1989-10-19 | ||
DE3228323A1 (en) * | 1982-07-29 | 1984-02-02 | Pierburg Gmbh & Co Kg, 4040 Neuss | FUEL INJECTION VALVE |
US4552312A (en) * | 1983-01-14 | 1985-11-12 | Tohoku Mikuni Kogyo Kabushiki Kaisha | Fuel injection valve |
DE3320610A1 (en) * | 1983-06-08 | 1984-12-13 | Gerhard Dipl.-Ing. 4630 Bochum Mesenich | Injection valve for internal combustion engines |
DE3332801A1 (en) * | 1983-09-12 | 1985-03-28 | Robert Bosch Gmbh, 7000 Stuttgart | Valve for gaseous or liquid media |
JPS61108866A (en) * | 1984-10-31 | 1986-05-27 | Nippon Denso Co Ltd | Electromagnet type fuel injection device |
DE3501193A1 (en) * | 1985-01-16 | 1986-07-17 | Robert Bosch Gmbh, 7000 Stuttgart | Fuel injection valve |
DE3510222A1 (en) * | 1985-03-21 | 1986-09-25 | Robert Bosch Gmbh, 7000 Stuttgart | SOLENOID VALVE, ESPECIALLY FUEL VOLUME CONTROL VALVE |
DE3516917A1 (en) * | 1985-05-10 | 1986-11-13 | Pierburg Gmbh & Co Kg | ELECTROMAGNETIC, INTERMITTENT INJECTION VALVE |
JPS61277867A (en) * | 1985-06-03 | 1986-12-08 | Nippon Denso Co Ltd | Electromagnetic type fuel injection valve |
DE3520142A1 (en) * | 1985-06-05 | 1986-12-11 | Bosch Gmbh Robert | ELECTROMAGNET |
DE3522992A1 (en) * | 1985-06-27 | 1987-01-02 | Bosch Gmbh Robert | Fuel injection valve |
DE3528296A1 (en) * | 1985-08-07 | 1987-02-19 | Fluidtech Gmbh | MAGNETIC VALVE |
DE3629646A1 (en) * | 1986-08-30 | 1988-03-03 | Bosch Gmbh Robert | ELECTROMAGNETICALLY ACTUABLE FUEL INJECTION VALVE |
JPS63176656A (en) * | 1987-01-14 | 1988-07-20 | Nippon Denso Co Ltd | Electromagnetic type fuel injection valve |
DE3701872A1 (en) * | 1987-01-23 | 1988-08-04 | Pierburg Gmbh | ELECTROMAGNETICLY CLOCKED INJECTION VALVE FOR MIXTURING COMPRESSING ENGINES |
-
1988
- 1988-10-10 DE DE3834446A patent/DE3834446A1/en not_active Withdrawn
-
1989
- 1989-10-10 JP JP1510902A patent/JPH04502947A/en active Pending
- 1989-10-10 KR KR1019900701239A patent/KR960010294B1/en not_active IP Right Cessation
- 1989-10-10 WO PCT/US1989/004325 patent/WO1990004098A1/en active IP Right Grant
- 1989-10-10 DE DE68913209T patent/DE68913209T2/en not_active Expired - Fee Related
- 1989-10-10 EP EP89911706A patent/EP0438479B1/en not_active Expired - Lifetime
Non-Patent Citations (1)
Title |
---|
See references of WO9004098A1 * |
Also Published As
Publication number | Publication date |
---|---|
JPH04502947A (en) | 1992-05-28 |
DE3834446A1 (en) | 1990-04-12 |
EP0438479B1 (en) | 1994-02-16 |
KR960010294B1 (en) | 1996-07-27 |
DE68913209T2 (en) | 1994-07-14 |
WO1990004098A1 (en) | 1990-04-19 |
DE68913209D1 (en) | 1994-03-24 |
KR900702219A (en) | 1990-12-06 |
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