EP1200728B1 - Soupape d'injection de carburant - Google Patents

Soupape d'injection de carburant Download PDF

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Publication number
EP1200728B1
EP1200728B1 EP00949152A EP00949152A EP1200728B1 EP 1200728 B1 EP1200728 B1 EP 1200728B1 EP 00949152 A EP00949152 A EP 00949152A EP 00949152 A EP00949152 A EP 00949152A EP 1200728 B1 EP1200728 B1 EP 1200728B1
Authority
EP
European Patent Office
Prior art keywords
valve
closing body
seat
fuel injection
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.)
Expired - Lifetime
Application number
EP00949152A
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German (de)
English (en)
Other versions
EP1200728A1 (fr
Inventor
Joerg Heyse
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP1200728A1 publication Critical patent/EP1200728A1/fr
Application granted granted Critical
Publication of EP1200728B1 publication Critical patent/EP1200728B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • F02M51/0632—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
    • F02M51/0667—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 acting as a valve or having a short 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
    • 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
    • F02M61/10—Other injectors with elongated valve bodies, i.e. of needle-valve type
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S239/00—Fluid sprinkling, spraying, and diffusing
    • Y10S239/90—Electromagnetically actuated fuel injector having ball and seat type valve

Definitions

  • the invention is based on a fuel injection valve according to the preamble of the main claim.
  • the Injection valve is designed such that the entire Pressure drop substantially drops at spray holes, the downstream of a valve seat, with which a spherical Valve-closing body cooperates, are arranged. Of the Valve-closing body is in a dead space between the valve seat and the spray holes in the flow direction of the fuel arranged opening. With a pestle is the Valve closing body with closed valve against the Valve seat pressed. The ram has the same diameter as the valve seat and is always in the closing direction of the constant System pressure of the fuel applied. About a channel in the Valve housing, the fuel from the plunger is spaced from fed down the valve closing body, in this way can perform an opening movement of the valve seat lifting.
  • the flow direction of the fuel at the valve seat is the same the closing movement of the valve closing body or the Valve needle.
  • the fuel is on the upstream side of the valve seat with a Pressure on, which acts in the closing direction of the valve, so that the fuel when opening the valve against the Opening direction of the valve needle acts.
  • the fuel injection valve according to the invention with the Characteristic features of the main claim has the Advantage that it is particularly easy and inexpensive can be produced. Advantageously, only a few Items needed, each individually very easy to manufacture and subsequently easy to install.
  • the fuel injection valve according to the invention can by the simplified nesting of all components be easily handled during assembly. It is only two solid and pressure-tight connections needed already proper functioning of the injector to guarantee.
  • valve closing body and the valve seat body are designed such that at Excitation of the actuator, the opening movement of the Valve closing body due to the concern of system pressure at the downstream side of the valve closing body at closed valve is fuel pressure assisted.
  • the Valve is designed to be a hydraulic Opening force is generated, so that, for example, a for Control needed power amplifier with less energy than previously usual can be operated, which in turn the Injection valve with lower starting currents is operable.
  • valve closing body and Valve seat body in the fuel volume downstream of the Sealing seat no negative pressure, since no volume increase caused by the needle movement.
  • no negative pressure since no volume increase caused by the needle movement.
  • the needle movement when opening an increase in volume caused the small quantity linearity and the Significantly improve atomization at the start of injection.
  • the valve closing body is fixed and pressure-tight with a fuel flow inside Needle sleeve connected.
  • the needle sleeve is again fixed and pressure-tightly connected to a valve housing, wherein the Axialmony of the valve closing body thereby allows is that the needle sleeve sections resiliently is trained. It is advantageous if the Needle sleeve its function of a compression spring by a helically folded spring section met.
  • the low moving mass of the needle sleeve and the Valve-closing body allows a quick opening and Close the injection valve, so that the switching times of the Injector can be shortened even further.
  • an atomizer disk downstream of the valve seat very easy in the valve body integrated, since a radial inflow into such Atomizer disk through the structural design of the Valve seat body and the associated flow guidance is favored.
  • the constructive design of the invention pressure compensated valve member consisting of needle and Valve-closing body and the low mass of this valve member allow a relatively small magnetic circuit, causing the Dimensions of the entire injector kept small can be.
  • FIG. 1 shows a inward opening fuel injector in section
  • Figure 2 is a plan view of a valve seat body.
  • Fuel injection valve is a so-called Injector opening, especially as High pressure injector for direct injection of Fuel in the combustion chamber of a mixture-compressing spark ignition internal combustion engine is suitable.
  • the fuel injection valve is a so-called top-feed injection valve executed, by which is meant that one upper inlet end of the injection valve on the opposite side to a lower discharge side End of the injector is executed.
  • the inlet side End of the injection valve forms a tubular Connecting piece 1.
  • a fuel filter 3 is arranged, through which the fuel enters.
  • the connecting piece 1 is in the region of a radial extending shoulder 4 with a sleeve-shaped Valve housing 5 firmly connected, wherein the connecting piece. 1 ultimately also represents a part of the valve housing.
  • the Valve housing 5 has a jacket portion 6 and a Floor section 7 on. In the bottom section 7 is e.g. a central outlet opening 9 is provided, via which the Fuel is injected directly into a combustion chamber.
  • the actuation of the fuel injection valve takes place, for example. electromagnetically. This is within the valve housing. 5 a magnetic coil 8 is arranged, wherein for receiving the Magnet coil 8 provided coil space radially outward through the skirt portion 6 of the valve housing 5 and upwards is limited by the shoulder 4 of the connecting piece 1.
  • the valve housing 5 serves as a valve seat carrier and the Receiving a valve seat body 10.
  • the valve seat body 10th has a e.g. frusto-conical valve seat surface 13, with a part-spherical valve closing body 14 for Forming a sealing seat interacts.
  • the valve closing body 14 close to the valve seat surface 13, so that the valve closed is.
  • the injection valve is in excited state shown in which the valve closing body 14 in a position raised from the valve seat surface 13 position is present.
  • valve closing body 14 For axial movement of the valve closing body 14 along a valve longitudinal axis 15 and thus to open against the Spring force of a trained as a bellows and firmly with the valve closing body 14 connected needle sleeve 16 or
  • Closing the injector serves the electromagnetic Circle with the magnetic coil 8, a first inner pole part 18, a second outer pole part 19 and also as Magnetic anchor serving valve closing body 14.
  • the needle sleeve 16 does not provide an axially movable valve needle conventional sense, as they are as a resilient component is executed, the at its the valve closing body 14th opposite end fixed to the valve housing 5 and connected to the connecting piece 1.
  • the connecting piece 1 and the fuel filter. 3 flowing fuel flows further downstream an inner opening of an adjusting sleeve 20, the Adjusting the spring force of acting as a return spring Needle sleeve 16 is used to close the injector.
  • the e.g. in the connecting piece 1 pressed adjusting sleeve 20th for this purpose abuts directly on a fold of the needle sleeve 16.
  • the fuel then flows through the needle sleeve 16 in axial direction up to the valve closing body 14, the an inner through hole 22 has.
  • the in the area the valve closing body 14 no longer folded, but Cylindrically shaped needle sleeve 16 extends through the Through-hole 22 e.g. axial almost completely and is with the valve closing body 14 at the outlet opening.
  • the fuel Downstream of the through hole 22 of the Valve-closing body 14, the fuel collects in one by a trough-shaped recess 21, in which the frusto-conical valve seat surface 13 leaking, formed Cavity 24 of the valve seat body 10. From the cavity 24th starting from the flow happens when open Injection valve then formed narrow gap between the Valve-closing body 14 and the valve seat surface 13. In this flow region is at least partially Flow reversal of the fuel before, in addition to a radial flow component an axial flow component added to the axial flow direction of Connecting piece 1 directed to the cavity 24 opposite is like the arrows in the area of the sealing seat clarify. In this way can be with the Fuel pressure and the fuel flow direction Supported opening operations of the injection valve realize.
  • a fuel flow is up to at least one, for example three on the outer periphery the valve seat body 10 provided flats 25, the as plan ground surfaces between itself and the shell section 6 of the valve housing 5 flow channels 26 form.
  • a valve seat body 10 as Single component shown in a plan view.
  • the Valve seat body 10 has by its three flats 25th a largely triangular shape, with the order each 120 ° away transition areas 27th between the flats 25 on the circumference of the valve seat body 10 have a circular outer contour.
  • the Transition regions 27 allow centered insertion of the Valve seat body 10 in the valve housing. 5
  • FIG. 1 is a three-layer atomizing disk 29 indicated schematically, the e.g. produced by multilayer electroplating.
  • These Atomizing disk 29 has, for example, in a middle Level multiple swirl channels 32, which in a central Swirl chamber 33 open.
  • the swirling in this way Fuel emerges from one in a lower level provided outlet opening 34 of the atomizer disk 29 from.
  • In the outlet 34 concentrates while the Fuel mainly in the vicinity of the wall, while in the Center forms an air core.
  • the exiting, ring-shaped closed liquid film thus spreads hollow conical in space.
  • multilayer swirl disks are also completely different or produced spray perforated disks or atomizer disks used.
  • valve housing 5 In the valve housing 5 is the Atomizer disk 29 in a recess provided for this purpose 35 of the bottom portion 7 inserted. After that, the Valve seat body 10 is inserted into the valve housing 5. Of the Valve seat body 10 is located with its bottom 30 on the Atomizing disc 29 on and so sets the height of the radial Inflow region for the atomizer disk 29 fixed. On the Top 37 of the valve seat body 10 is a Spacer 38 placed only in the three Transition regions 27 rests on the valve seat body 10. The spacer 38 is used with a specific thickness for Setting the stroke of the valve closing body 14 is formed. The flow channels 26 are through the spacer 38 so covered in their outdoor areas that the fuel can flow freely into it.
  • the needle sleeve 16 is made, for example, by deep drawing Made of spring steel. Which perform a spring effect Fold the needle sleeve 16 are introduced by in the Sleeve a mold is inserted, which is a Screw resembles and with its thread on the Sleeve inner wall rests. By increasing the Ambient pressure in a pressure chamber and sealing the Sleeve inside against the overpressure implodes the sleeve and assumes the outer shape of the helical tool. This tool can then be like a screw out of the Needle sleeve 16 are turned out.
  • the Sleeve be produced by plastic injection molding, wherein the Plastic must have permanently consistent elasticity.
  • the needle sleeve 16 has the function of a compression spring, the Valve closure member 14 against the valve seat surface 13 in non-energized state in the closed position of Injection valve presses.
  • the needle sleeve 16 is despite low wall thickness and therefore low weight because of folded or thread-like shape very stable and stiff against the internal fuel pressure.
  • the first pole part 18 is so far in the valve housing 5 inserted until it rests on the second pole part 19.
  • the solenoid 8 is in this way in all directions surrounded by the two pole pieces 18, 19. With a bent sleeve end 40 is the needle sleeve 16 on the first pole piece 18. On this preassembled valve part is subsequently set the connection piece 1, which with his shoulder 4 on the sleeve end 40 and indirectly on the first pole 18 comes to rest. After that, that will be Valve housing 5 and the connecting piece 1 tight and tight by attaching a weld 42 together connected. The weld 42 must be designed in such a way that the needle sleeve 16 pressure-tight with the Connecting piece 1 is connected. After this attachment is the adjusting sleeve 20 in the connecting piece. 1 brought in. Subsequently, the fuel filter 3 used and a sealing ring 44 on the connecting piece. 1 postponed.
  • valve closing body 14 presses the valve closing body 14 against the valve seat surface thirteenth
  • the fuel is under the upstream of the sealing seat System pressure.
  • the flow cavities downstream of the Sealing seat are pressureless filled with fuel.
  • a Sealing the pressure-free area against the pressurized area is affected by the pressure-tight Connecting the needle sleeve 16 both with the Valve-closing body 14 and with the connection piece. 1 reached.
  • the clamping area between valve housing 5, Valve seat body 10 and atomizer disk 29 does not have to be absolutely pressure-tight, because only when open Injector pressure is applied and then the flow directly the way through the flow openings in the Atomizer disk 29 because of the low Flow resistance decreases.
  • the part-spherical valve closing body 14 has on its the valve seat surface 13 facing away from a ground face 45, perpendicular to Valve longitudinal axis 15 runs.
  • the as magnet armature functioning valve closing body 14 is when energizing the Solenoid 8 from the valve seat surface 13 to an am first pole portion 18 provided stop surface 46 is pulled.
  • the path between the two end positions (stop surface 46, valve seat surface 13) of the valve closing body 14 provides thus the hub dar.
  • the stroke can be influenced. At the Opening the injector arises in the fuel volume downstream of the sealing seat no negative pressure, since no Volume increase caused by the needle movement.
  • the Small quantity linearity and atomization at the start of injection improve.
  • the low moving mass of the needle sleeve 16 and the valve closing body 14 allows a quick opening and closing the injector.
  • the Inventive fuel injector inside flowed through the valve closing body 14 has.
  • fuel occurs near the valve longitudinal axis 15 to the downstream end of the valve closing body 14, so that with the valve closed on the downstream side of the Valve closing body 14 immediately upstream of the Valve seat 13 System pressure applied.
  • a Hydraulic opening force generated by the Opening operation of the valve is fuel pressure assisted.
  • valve seat body 10 can also be used as a flat seat be formed so that a fuel flow of the flowed through inside valve seat body 14 from only radially to outwards without axial flow component takes place. Also in In this case, the opening movement of the. Valve closing body 14 fuel pressure assisted since turn the system pressure at the bottom of the Valve closing body 14 with the valve closed before Valve seat 13 is applied.

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  • 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)

Claims (13)

  1. Injecteur de carburant pour des systèmes d'injection de carburant de moteurs à combustion interne ayant un axe longitudinal (15) avec un élément d'actionnement (8, 18, 19) susceptible d'être excité, un organe d'obturation de soupape (14), mobile axialement suivant l'axe longitudinal (15) de l'injecteur, coopérant avec un siège de soupape fixe (13) réalisé dans un organe formant siège de soupape (10) pour ouvrir et fermer l'injecteur et au moins un orifice de sortie (9) en aval du siège de soupape (13),
    l'organe d'obturation de soupape (14) et l'organe formant siège de soupape (10) étant réalisés pour que le mouvement d'ouverture de l'organe d'obturation (14) soit aidé par la pression du carburant,
    caractérisé en ce que
    le mouvement d'ouverture de l'organe d'obturation de soupape (14) s'écarte de l'orifice de sortie (9) et le mouvement de fermeture de l'organe d'obturation (14) est dirigé vers l'orifice de sortie (9) et
    l'organe d'obturation de soupape (14) comporte un perçage traversant intérieur (22) à travers lequel passe le carburant suivant une direction opposée à celle du mouvement d'ouverture de l'organe d'obturation de soupape (14).
  2. Injecteur de carburant selon la revendication 1,
    caractérisé en ce que
    l'organe formant siège de soupape (10) est réalisé pour qu'en amont du siège de soupape (13), entre l'organe d'obturation de soupape (14) et le corps formant siège de soupape (10), on ait une cavité (24) à partir de laquelle le carburant arrive dans le siège de soupape (13) et présente une composante d'écoulement radial vers l'extérieur.
  3. Injecteur de carburant selon la revendication 2,
    caractérisé en ce que
    l'organe formant siège de soupape (10) est réalisé pour qu'en amont du siège de soupape (13), entre l'organe d'obturation (14) et l'organe formant siège de soupape (10), on ait une cavité (24) à partir de laquelle le carburant se dirige vers le siège de soupape (13) et présente en plus d'une composante d'écoulement radiale, également une composante d'écoulement axiale dans la direction de mouvement de l'organe d'obturation de soupape (14).
  4. Injecteur de carburant selon l'une des revendications précédentes,
    caractérisé en ce que
    l'organe d'obturation de soupape (14) est en forme de calotte sphérique.
  5. Injecteur de carburant selon l'une quelconque des revendications précédentes,
    caractérisé en ce que
    l'organe d'obturation de soupape (14) est relié solidairement et de manière étanche à la pression à un manchon (16) formant aiguille traversé par le carburant.
  6. Injecteur de carburant selon la revendication 5,
    caractérisé en ce que
    le manchon formant aiguille (16) traverse au moins en partie un perçage traversant intérieur (22) de l'organe d'obturation de soupape (14) et est fixé dans cet organe.
  7. Injecteur de carburant selon les revendications 5 ou 6,
    caractérisé en ce que
    le manchon formant aiguille (16) est relié à son extrémité opposée à celle de l'organe d'obturation de soupape (14), de manière solidaire et étanche à la pression, à un boítier d'injecteur (1, 5) et le mouvement axial de l'organe d'obturation de soupape (14) est rendu possible par le manchon en forme d'aiguille (16) qui a un segment élastique comme un ressort.
  8. Injecteur de carburant selon la revendication 7,
    caractérisé en ce que
    le segment élastique comme un ressort du manchon formant aiguille (16) a un pli de forme hélicoïdale.
  9. Injecteur de carburant selon l'une des revendications précédentes,
    caractérisé en ce que
    l'organe formant siège de soupape (10) comporte une cavité centrale (21) en forme d'auge à laquelle se raccorde une surface de siège de soupape (13) tronconique dans la direction de l'écoulement.
  10. Injecteur de carburant selon l'une des revendications 1 à 8,
    caractérisé en ce que
    l'organe formant siège de soupape (10) est en forme de siège plat.
  11. Injecteur de carburant selon l'une des revendications 9 ou 10,
    caractérisé en ce que
    l'organe formant siège de soupape (10) est réalisé sans orifice d'écoulement intérieur de sorte que le chemin axial de passage de carburant en direction de l'orifice de sortie (9) est exclusivement formé à la périphérie extérieure de l'organe formant siège de soupape (10).
  12. Injecteur de carburant selon la revendication 11,
    caractérisé en ce que
    l'organe formant siège de soupape (10) a un contour extérieur différent d'un contour circulaire avec au moins une partie aplatie (25) libérant un chemin de passage de l'écoulement.
  13. Injecteur de carburant selon la revendication 12,
    caractérisé en ce que
    l'organe formant siège de soupape (10) a une forme très largement triangulaire avec trois parties aplaties (25).
EP00949152A 1999-07-08 2000-07-07 Soupape d'injection de carburant Expired - Lifetime EP1200728B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19931822A DE19931822A1 (de) 1999-07-08 1999-07-08 Brennstoffeinspritzventil
DE19931822 1999-07-08
PCT/DE2000/002186 WO2001004486A1 (fr) 1999-07-08 2000-07-07 Soupape d'injection de carburant

Publications (2)

Publication Number Publication Date
EP1200728A1 EP1200728A1 (fr) 2002-05-02
EP1200728B1 true EP1200728B1 (fr) 2005-10-19

Family

ID=7914077

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00949152A Expired - Lifetime EP1200728B1 (fr) 1999-07-08 2000-07-07 Soupape d'injection de carburant

Country Status (7)

Country Link
US (1) US7032846B1 (fr)
EP (1) EP1200728B1 (fr)
JP (1) JP2003504550A (fr)
CN (1) CN1158459C (fr)
BR (1) BR0012275A (fr)
DE (2) DE19931822A1 (fr)
WO (1) WO2001004486A1 (fr)

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EP2354528B1 (fr) * 2010-01-15 2012-08-29 Continental Automotive GmbH Ensemble de soupape et soupape d'injection
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US10927739B2 (en) 2016-12-23 2021-02-23 Cummins Emission Solutions Inc. Injector including swirl device
US10458293B2 (en) * 2017-07-20 2019-10-29 Woodward, Inc. Metering plate for reduction in discharge coefficient variation between gaseous fuel injectors
CN107617519A (zh) * 2017-09-22 2018-01-23 丰汉电子(上海)有限公司 脉冲式离型剂喷涂用电磁喷嘴
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US5979803A (en) * 1997-05-09 1999-11-09 Cummins Engine Company Fuel injector with pressure balanced needle valve

Also Published As

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EP1200728A1 (fr) 2002-05-02
WO2001004486A1 (fr) 2001-01-18
DE50011391D1 (de) 2006-03-02
JP2003504550A (ja) 2003-02-04
BR0012275A (pt) 2002-03-12
DE19931822A1 (de) 2001-01-11
CN1158459C (zh) 2004-07-21
CN1360663A (zh) 2002-07-24
US7032846B1 (en) 2006-04-25

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