EP1112446B1 - Brennstoffeinspritzventil - Google Patents

Brennstoffeinspritzventil Download PDF

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Publication number
EP1112446B1
EP1112446B1 EP99953591A EP99953591A EP1112446B1 EP 1112446 B1 EP1112446 B1 EP 1112446B1 EP 99953591 A EP99953591 A EP 99953591A EP 99953591 A EP99953591 A EP 99953591A EP 1112446 B1 EP1112446 B1 EP 1112446B1
Authority
EP
European Patent Office
Prior art keywords
valve
swirl
valve seat
fuel injection
downstream
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
EP99953591A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1112446A1 (de
Inventor
Ralf Trutschel
Frank Dallmann
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
Priority claimed from DE19907860A external-priority patent/DE19907860A1/de
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP1112446A1 publication Critical patent/EP1112446A1/de
Application granted granted Critical
Publication of EP1112446B1 publication Critical patent/EP1112446B1/de
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
    • 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
    • F02M61/18—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for
    • 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
    • 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 invention is based on a fuel injector according to the genus of the main claim.
  • DE 38 08 635 A1 is already an electromagnetic one actuatable fuel injector known in which a trained on an axially movable valve needle Valve closing section with a fixed valve seat for opening and closing of the valve interacts.
  • the Valve closing section is in the downstream direction Tapered while the valve seat runs frustoconical. This valve closing section forms the downstream end of the valve needle, which in a Cone tip runs out.
  • Upstream of the The valve closing section or the valve seat is the Valve needle with several spiral fuel channels provided by which the fuel to be sprayed swirled to the valve seat to atomize the To improve fuel and the To control fuel flow rate.
  • Valve needle In addition to the tapered, pointed downstream end of the Valve needle is, for example, from US Pat. No. 5,350,119 Fuel injector with an axially movable Valve needle known to have a rounded Has valve closing portion which is the downstream end the valve needle forms.
  • DE 30 46 889 C2 discloses a Fuel injector with a flat armature and one attached fastening part to provide.
  • This movable valve member acts with a housing-fixed Valve seat together.
  • the closure part has a convex molded valve closing section by a Flat bevels running perpendicular to the longitudinal axis of the valve is completed.
  • Downstream of the valve seat is a Collection space provided, the volume of which should be as small as possible should and through the valve seat body, the flat lower Limitation of the valve closing section and the opposite flat upper boundary surface of a Swirl body arranged downstream of the valve seat body is limited.
  • JP 10047210 A is already a Fuel injection valve for fuel injection systems from Internal combustion engines known to be an excitable Actuator and one axially along one Valve longitudinal axis movable valve needle, which on its has a valve closing section downstream end, the one for opening and closing the valve with a fixed Valve seat cooperates.
  • the valve seat is included formed on a flat valve seat element. Upstream of the valve seat, the valve has one Swirl body, on the one hand as a guide for the valve needle serves and on the other hand the fuel to be sprayed Twist impresses. Downstream of the valve seat is at downstream end of the valve closing section a Flattening perpendicular to the longitudinal axis of the valve intended. One closes to the valve seat Exit opening, which has a diameter D, the is significantly larger than the diameter of the Flattened valve needle.
  • the fuel injector according to the invention with the characteristic features of the main claim has the Advantage that compared to known valves with a Swirl generation in the fuel upstream of the valve seat improved fuel processing is achieved.
  • improved fuel processing is achieved.
  • This Vorstrahl is formed by fuel that is at closed valve in an inner swirl chamber of the swirl-generating agent has collected in front of the valve seat. This fuel largely flows when the valve is opened axial and not twisted to a downstream of the Valve seat arranged outlet opening.
  • the Measures according to the invention is effectively a better one Preparation of the fuel in the pre-jet enables.
  • the swirl-generating means are as disc-shaped swirl element that is very simple structured and therefore easy to form.
  • an inner one in the swirl element with the simplest of means Opening area can be created that extends across the entire extends axial thickness of the swirl element and from one outer peripheral edge area is surrounded.
  • the guide element is also easy to manufacture.
  • the guide element advantageously serves with a inner guide opening of the leadership of the projecting Valve needle.
  • Embodiments of the invention are in the drawing shown in simplified form and in the following Description explained in more detail.
  • 1 shows a first Embodiment of a fuel injector
  • figure 2 shows a second example of a fuel injector, only the downstream valve end is shown
  • Figure 3 a first leadership and seating area as an enlarged Detail from Figure 2
  • Figure 4 a second guide and Seating area
  • Figure 5 shows a third leadership and Seating area
  • Figure 6 a Swirl element
  • Figure 7 is a guide element which in Fuel injection valves according to Figures 1 to 5 can be used are.
  • electromagnetically actuatable valve in the form of an injection valve for Fuel injection systems from spark-ignited Internal combustion engines have one of a magnetic coil 1 at least partially surrounded, as the inner pole of one Serving magnetic circuit, tubular, largely hollow cylindrical core 2.
  • the fuel injector is particularly suitable as a high pressure injection valve for direct injection of fuel into a combustion chamber Internal combustion engine.
  • a tiered one Plastic bobbin 3 takes a winding of Magnetic coil 1 and allows in connection with the core 2 and an annular, non-magnetic, from the Magnetic coil 1 partially surrounded intermediate part 4 with a L-shaped cross section a particularly compact and short Structure of the injection valve in the area of the solenoid coil 1.
  • the core 2 of the magnetic circuit also serves as Fuel inlet port, the longitudinal opening 7 a Represents fuel supply channel.
  • an outer metal (e.g. ferritic) housing part 14 which as the outer pole or outer guide element closes the magnetic circuit and the Solenoid 1 completely at least in the circumferential direction surrounds.
  • a fuel filter 15 is provided for the Filtering out such fuel components ensures that due to their size in the injector clogging or Can cause damage.
  • the fuel filter 15 is z. B. fixed by pressing in the core 2.
  • the core 2 forms with the housing part 14 that on the inlet side End of the fuel injector, with the upper Housing part 14, for example in the axial direction seen just downstream via the magnetic coil 1 extends beyond.
  • the upper housing part 14 closes tight and tight to a lower tubular housing part 18, the Z. B. consists of an axially movable valve part an armature 19 and a rod-shaped valve needle 20 or encloses an elongated valve seat support 21 or receives.
  • the two housing parts 14 and 18 are, for. B. with a circumferential weld seam firmly connected.
  • the valve seat support 21 has an inner one over its entire axial extent Through opening 24 which is concentric with the Valve longitudinal axis 8 runs.
  • valve seat carrier 21 With its lower end 25, which also the downstream completion of the whole Fuel injector, surrounds the Valve seat carrier 21 in the through opening 24 fitted disc-shaped valve seat element 26 with a narrowing frustoconically downstream Valve seat surface 27.
  • the through opening 24 In the through opening 24 is the z. B. rod-shaped, a largely circular Cross-section valve needle 20 arranged, the a valve closing section 28 at its downstream end having.
  • This, for example, spherical or partial spherical or rounded or tapered tapered valve closing section 28 acts in a known manner Way with that provided in the valve seat member 26 Valve seat surface 27 together.
  • the flattening 29 is e.g. around a flat sanding.
  • Downstream of the Valve seat surface 27 is at least in valve seat element 26 an outlet opening 32 is introduced for the fuel.
  • the injection valve is actuated in a known manner Way electromagnetic.
  • a piezo actuator or a magnetostrictive actuator as excitable actuators are also conceivable.
  • An operation is also over a controlled pressure-loaded piston is conceivable.
  • For axial Movement of the valve needle 20 and thus against opening the spring force of one in the longitudinal opening 7 of the core 2 arranged return spring 33 or closing the Injector serves the electromagnetic circuit with the Solenoid 1, the core 2, the housing parts 14 and 18 and the anchor 19.
  • the anchor 19 is with the Valve closing section 28 facing away from the end of the valve needle 20 z. B. connected by a weld and on the core 2nd aligned.
  • valve seat support 21 On the armature 19 facing end provided guide opening 34 and on the other hand, an upstream of the valve seat member 26 arranged disc-shaped guide element 35 with a dimensionally accurate guide opening 55.
  • the anchor 19 is during its axial movement surrounded by the intermediate part 4.
  • a Swirl element 47 arranged so that all three elements 35, 47 and 26 lie directly on top of each other and in Find valve seat bracket 21.
  • the three disc-shaped elements 35, 47 and 26 are for example firmly bonded together.
  • Pressed or screwed adjusting sleeve 38 is used Setting the spring preload using a centering piece 39 with its upstream side on the adjusting sleeve 38 adjacent return spring 33, which with their opposite side is supported on the anchor 19.
  • At anchor 19 are one or more bore-like flow channels 40 provided through which the fuel from the longitudinal opening 7th in the core 2 from downstream of the flow channels 40 trained connecting channels 41 near the guide opening 34 in the valve seat support 21 into the through opening 24 can reach.
  • the stroke of the valve needle 20 is determined by the installation position of the Valve seat element 26 predetermined. A final position of the Valve needle 20 is through when magnet coil 1 is not energized the installation of the valve closing section 28 on the Valve seat surface 27 of the valve seat element 26 fixed, while the other end position of the valve needle 20 at excited solenoid 1 by the system of the armature 19 on the downstream end of the core 2 results.
  • the Surfaces of the components in the latter stop area are chrome-plated, for example.
  • the electrical contacting of the magnetic coil 1 and thus their excitation takes place via contact elements 43, which are still outside of the bobbin 3 with a Plastic extrusion 44 are provided.
  • the Plastic encapsulation 44 can also be used for other Components (e.g. housing parts 14 and 18) of the Extend fuel injector. From the Plastic extrusion 44 runs an electrical Connection cable 45, via which the energization of the magnetic coil 1 he follows. The plastic extrusion 44 protrudes through the in Upper housing part 14 interrupted in this area.
  • FIG 2 shows a second embodiment of a Fuel injector, with only the downstream Valve end is shown.
  • the valve seat support 21 in Area of the guide opening 34 several axially parallel extending connecting channels 41 are provided.
  • To be safe To allow flow into the valve seat support 21 is the passage opening 24 with a larger diameter trained, while the valve seat support 21 thin-walled is executed.
  • the leadership and seating area is a cutout shown in Figure 2 again in a changed scale to this valve area with the designed according to the invention Clarify valve needle end better.
  • the one in spray-side end 25 of the valve seat carrier 21 in its Through opening 24 provided guide and seating area is in the embodiment shown in Figure 3 through three axially successive, disc-shaped, functionally separate elements formed that are fixed to each other are connected.
  • follow in the downstream direction successively the guide element 35, the very flat Swirl element 47 and valve seat element 26.
  • the valve seat element 26 partially has one Outside diameter on that it taut with little play in a lower portion 49 of the through opening 24 of the Valve seat support 21 downstream one in the Through opening 24 provided stage 51 can be fitted can.
  • the guide element 35 and the swirl element 47 have, for example, a slightly smaller one Outside diameter as the valve seat member 26.
  • the guide element 35 has a dimensionally accurate inner Guide opening 55 through which the valve needle 20th moved through during their axial movement. From the outside The guide element 35 has a circumference over the circumference distributes several recesses 56, one of which Fuel flow on the outer periphery of the guide member 35 along into the swirl element 47 and further in the direction to the valve seat surface 27 is guaranteed. Based on the figures 7 and 8 each is an embodiment of the swirl element 47 or the guide element 35 described in more detail.
  • the three elements 35, 47 and 26 lie directly with theirs respective end faces to each other and already exist their assembly in the valve seat bracket 21 firmly together connected before.
  • the solid connection of the individual disc-shaped elements 35, 47 and 26 takes place cohesively on the outer circumference of the elements 35, 47, 26, welding or bonding are preferred joining methods.
  • welding spots or short weld seams 60 in the peripheral areas provided in which the guide member 35 none Has recesses 56.
  • the entire multi-disc valve body is, for example inserted into the through opening 24 until the upper end face 59 of the guide element 35 on the step 51 is applied.
  • the valve body is attached e.g. by means of a weld seam 61 achieved by means of a laser lower end of the valve between valve seat element 26 and valve seat bracket 21.
  • valve closing section 28 According to the downstream end of the Valve closing section 28 and thus the entire Valve needle 20 with the perpendicular to the valve longitudinal axis 8 provided flattening 29.
  • the one on the valve pin 20 provided flat 29 has a diameter d, which is larger than the diameter D which is downstream subsequent outlet opening 32, so that d> D applies. It when the diameter d is particularly advantageous known size of the outlet opening 32 is selected that the ratio d / D is about 1.5.
  • This pre-beam is formed by fuel, which is when closed Valve in an inner swirl chamber 92 of swirl element 47 collected in front of the valve seat. This fuel flows when opening the valve largely axially and not twisted to the outlet opening 32. Only immediately then the main beam follows that is formed by fuel that swirl element 47 flowed through directly beforehand and the corresponding is twisted.
  • the flattening 29 on the valve needle 20 now causes in advantageously an improved preparation of the Vorstrahles because the flattening 29 is a vortexing of the Allows fuel. In this way, the Droplet size can be reduced, creating a finer Fuel spray is sprayed. In addition, one can Increasing the homogeneity of the main beam compared to pointed reach tapered or rounded valve needle ends. It should be explicitly stated that for the Invention the type of training upstream of the Valve seat 27 arranged swirl elements 47 none Influence. Instead of the disk-shaped shown Swirl elements 47 can also have swirl-generating means in completely arbitrary design (e.g. cylindrical Swirl body, swirl grooves on the valve needle) become.
  • Valve seat element 26 has a circumferential flange 64, which engages downstream end of the valve seat support 21.
  • the top 65 of the circumferential flange 64 is in one Clamping with the guide opening 55 and Valve seat surface 27 ground. The insertion of the three-disc valve body takes place until the Top 65 of the flange 64 at the end 25 of the Valve seat carrier 21. In this investment area both Components 21 and 26 welded together.
  • the Exit opening 32 is e.g. inclined towards Valve longitudinal axis 8 introduced, wherein it downstream in a convexly curved spray region 66 ends.
  • FIG. 5 essentially corresponds the example shown in Figure 4, the essential Difference is that now an additional fourth disc-shaped spray element 67 in the form of a Spray plate is provided, which is the outlet opening 32 has.
  • the spray 67 and that Valve seat element 26 are e.g. via a means Laser welding achieved weld seam 68 firmly with one another connected, the weld being in a ring circumferential recess 69 is made.
  • Next to the Laser welding is also bonding or resistance welding et al suitable joining methods for this connection. in the Area of the top 65 'of the spray 67 and End 25 of the valve seat support 21, both components are fixed connected to each other (weld 61).
  • the valve seat element 26 has wear protection reasons has a high carbon content and is highly rewarded. from that the weldability is less good.
  • the Spraying element 67 is made of a weldable one Material made.
  • the weld 68 must also only be slightly resilient.
  • the outlet opening 32 can inexpensive late in the manufacturing process e.g. by drilling be introduced. At the entrance to the exit opening 32 there is a sharp hole edge due to the turbulence in the flow are generated, from which an atomization in particularly fine droplets result.
  • FIG 6 is between the guide member 35 and Valve seat element 26 embedded swirl element 47 as Individual component shown in a plan view.
  • the Swirl element 47 can be inexpensively, for example, by means of Stamping, wire EDM, laser cutting, etching or others known methods from a sheet or by galvanic Deposition.
  • an inner opening area 90 is formed, which over the entire axial thickness of the swirl element 47 extends.
  • the Opening area 90 is surrounded by an inner swirl chamber 92, through which the valve closing section 28 of the valve needle extends 20 extends through, and from a variety of in the Swirl chamber 92 opening swirl channels 93 are formed.
  • the Swirl channels 93 open tangentially into swirl chamber 92 and stand with their ends 95 facing away from the swirl chamber 92 not with the outer circumference of the swirl element 47 in Connection. Rather, there remains between the as Inlet pockets formed ends 95 of the swirl channels 93 and the outer circumference of the swirl element 47 a circumferential Border area 96.
  • the swirl chamber 92 becomes inside of the valve needle 20 (valve closing section 28) and outwards through the wall of the opening area 90 of the Swirl elements 47 limited.
  • the swirl channels 93 in the swirl chamber 92 get the Fuel imprinted an angular momentum, which in the further Flow is maintained up to the outlet opening 32.
  • the centrifugal force makes the fuel hollow-conical hosed.
  • the ends 95 of the swirl channels 93 serve as Collection bags, which are a reservoir for large areas form low-turbulence inflow of fuel. After Flow deflection occurs slowly and the fuel low turbulence into the tangential swirl channels 93 a, whereby a largely trouble-free swirl can be generated is.
  • Figure 7 is an embodiment of a Guide element 35 removable. About its outer circumference the guide element 35 has alternating recesses 56 and tooth-like protruding areas 98. The tooth-shaped Areas 98 can be rounded. The Manufacturing of the guide element 35 takes place e.g. by Punching. In the example according to FIG. 7, the Recess base 99 inclined so that the Recess base 99 advantageously perpendicular to the Axes of the swirl channels 93 of the underlying one Swirl elements 47 run.
EP99953591A 1998-08-27 1999-08-25 Brennstoffeinspritzventil Expired - Lifetime EP1112446B1 (de)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
DE19838949 1998-08-27
DE19838949 1998-08-27
DE19907860 1999-02-24
DE19907860A DE19907860A1 (de) 1998-08-27 1999-02-24 Brennstoffeinspritzventil
PCT/DE1999/002658 WO2000012892A1 (de) 1998-08-27 1999-08-25 Brennstoffeinspritzventil

Publications (2)

Publication Number Publication Date
EP1112446A1 EP1112446A1 (de) 2001-07-04
EP1112446B1 true EP1112446B1 (de) 2002-11-06

Family

ID=26048419

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99953591A Expired - Lifetime EP1112446B1 (de) 1998-08-27 1999-08-25 Brennstoffeinspritzventil

Country Status (4)

Country Link
US (1) US6938840B1 (ja)
EP (1) EP1112446B1 (ja)
JP (1) JP4469502B2 (ja)
WO (1) WO2000012892A1 (ja)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080248338A1 (en) * 2004-10-05 2008-10-09 Masaya Yano Fuel Cell and Power Generating Method
JP4992209B2 (ja) * 2005-08-12 2012-08-08 トヨタ自動車株式会社 燃料ガス供給装置
DE102005052255B4 (de) * 2005-11-02 2020-12-17 Robert Bosch Gmbh Brennstoffeinspritzventil
JP2008138531A (ja) * 2006-11-30 2008-06-19 Mitsubishi Electric Corp 燃料噴射弁
US8402895B2 (en) * 2010-04-30 2013-03-26 Raytheon Company Vortice amplified diffuser for buoyancy dissipater and method for selectable diffusion
US8371204B2 (en) 2010-04-30 2013-02-12 Raytheon Company Bubble weapon system and methods for inhibiting movement and disrupting operations of vessels
KR101154579B1 (ko) 2010-11-23 2012-06-08 현대자동차주식회사 엔진의 인젝터홀 구조
JP5452515B2 (ja) * 2011-01-31 2014-03-26 日立オートモティブシステムズ株式会社 燃料噴射弁
DE102011009892A1 (de) 2011-01-31 2012-08-02 Benteler Sgl Gmbh & Co. Kg Kraftfahrzeugbauteil und Verfahren zur Herstellung des Kraftfahrzeugbauteils
US9546633B2 (en) 2012-03-30 2017-01-17 Electro-Motive Diesel, Inc. Nozzle for skewed fuel injection
DE102019104294A1 (de) * 2018-03-15 2019-09-19 Denso Corporation Korrosionsbeständige Vorrichtung

Family Cites Families (10)

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Publication number Priority date Publication date Assignee Title
DE3046889A1 (de) 1980-12-12 1982-07-15 Robert Bosch Gmbh, 7000 Stuttgart Elektromagnetisch betaetigbares ventil, insbesondere kraftstoffeinspritzventil fuer kraftstoffeinspritzanlagen
IT1181954B (it) 1984-03-28 1987-09-30 Daimler Benz Ag Beccuccio iniettore per motori a combustione interna ad infezione a compressione d'aria
DE3733604A1 (de) * 1987-10-05 1989-04-13 Bosch Gmbh Robert Lochkoerper fuer eine kraftstoffeinspritzventil
US4899699A (en) 1988-03-09 1990-02-13 Chinese Petroleum Company Low pressure injection system for injecting fuel directly into cylinder of gasoline engine
US4971254A (en) * 1989-11-28 1990-11-20 Siemens-Bendix Automotive Electronics L.P. Thin orifice swirl injector nozzle
US5350119A (en) 1993-06-01 1994-09-27 Siemens Automotive L.P. Clad metal orifice disk for fuel injectors
JP3156554B2 (ja) * 1995-07-24 2001-04-16 トヨタ自動車株式会社 燃料噴射弁
JP3625106B2 (ja) * 1996-07-29 2005-03-02 三菱電機株式会社 燃料噴射弁
US5878962A (en) * 1997-09-24 1999-03-09 Siemens Automotive Corporation Pressure swirl injector with angled cone spray for fuel injection
US5996912A (en) * 1997-12-23 1999-12-07 Siemens Automotive Corporation Flat needle for pressurized swirl fuel injector

Also Published As

Publication number Publication date
US6938840B1 (en) 2005-09-06
EP1112446A1 (de) 2001-07-04
JP4469502B2 (ja) 2010-05-26
WO2000012892A1 (de) 2000-03-09
JP2002523683A (ja) 2002-07-30

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