EP0447502A1 - Soupape d'injection de carburant. - Google Patents

Soupape d'injection de carburant.

Info

Publication number
EP0447502A1
EP0447502A1 EP19900911533 EP90911533A EP0447502A1 EP 0447502 A1 EP0447502 A1 EP 0447502A1 EP 19900911533 EP19900911533 EP 19900911533 EP 90911533 A EP90911533 A EP 90911533A EP 0447502 A1 EP0447502 A1 EP 0447502A1
Authority
EP
European Patent Office
Prior art keywords
valve
magnet
needle
valve needle
armature
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
Application number
EP19900911533
Other languages
German (de)
English (en)
Other versions
EP0447502B1 (fr
Inventor
Stefan Maier
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 EP0447502A1 publication Critical patent/EP0447502A1/fr
Application granted granted Critical
Publication of EP0447502B1 publication Critical patent/EP0447502B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M51/00—Fuel-injection apparatus characterised by being operated electrically
    • 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
    • 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 relates to a fuel injection valve for fuel injection devices of internal combustion engines of the type defined in the preamble of claim 1.
  • the Ventilna ⁇ el carries in the area between a valve noble guide in the valve chamber and the clamping of the valve needle in the magnet armature an annular stop shoulder, which cooperates with a stop ring representing the stroke stop in the valve housing, the inside diameter is smaller than the outside diameter of the stop shoulder and which covers the valve space.
  • the stop ring is positioned in the valve housing so that a residual air gap remains when the stop shoulder rests against the stop ring between the mutually facing end faces of the magnet core and the magnet armature.
  • the return spring for the valve needle which is designed as a cylindrical compression spring, is accommodated and supported in the hollow cylindrical interior of the magnetic core . in a Mul ⁇ e in the front of the armature.
  • the annular stroke stop for the Vencilnacel has ⁇ en
  • valve nacel carries two guide sections of larger diameter which are arranged at a relatively large distance from one another and slide along the inner wall of the valve space.
  • Fuel injection valve can not be fallen below.
  • the fuel injector according to the invention with ⁇ en characterizing features of the claim L has ⁇ en advantage ⁇ ass with the setting öglic.ikeic for the
  • valve needle stroke is largely insensitive to the deviation of the valve needle axis from the valve housing axis, the valve needle does not require any additional guides in the valve chamber, but rather requires guidance by a magnetic armature and centering in the valve seat.
  • valve needle fastened in the magnet armature is passed through the magnet armature so that it hits the crossbar directly with its front end during the opening stroke, this leads to the achievement of soft magnetic components, such as cer magnet armature, are not exposed to mechanical stresses caused by the Huoanschlag.
  • the special Behan ⁇ lun ⁇ cer surface of these components can therefore be dispensed with.
  • the valve nacel on the other hand, must be hardened from other greens anyway, so that it can withstand the mechanical loads when struck without any problems.
  • a further manufacturing simplification of the fuel injection valve according to the invention is achieved in that the magnet armature has a coaxial blind bore that is open toward the magnet core, on which the return spring surrounding the valve end section is supported, the slotted adjusting tube end-end in ⁇ ie the blind hole protrudes, and thereby, cass cer Magr.etanK.er with an annular guide portion formed near the open enoe of the blind hole is guided axially displaceably on the adjusting tube.
  • FIG. 1 shows a longitudinal section of a fuel injection valve for a fuel injection device of an internal combustion engine
  • FIG. 1 is an enlarged view of section II in Fig. 1,
  • Fuel injection device of an internal combustion engine ascnine has a three-part housing 10 with an upper part 11, middle part 12 and lower part 13.
  • the hollow cylincrical lower part 13 containing a valve chamber 14 and cas provided with an axial fuel inlet connection 15 upper part 11 are inserted into the cup-shaped central part 12 and held by flanging.
  • the valve space 14 is near the lower end of the lower part 13
  • Valve opening 16 limited, which in turn is surrounded by a valve seat 17.
  • a valve needle 18 works together with the valve seat 17, which is actuated by an electromagnet 20.
  • an intermediate ring 19 is inserted between the end face of the lower part 13 and the central part that runs out like a nozzle on the pot bottom . 12, an intermediate ring 19 is inserted.
  • the upper part 11 covers the central part 12 with a flange 21 and projects into the interior of the interior with a hollow cylindrical, nozzle-like coaxial projection 22.
  • the electromagnet 20 consists in a known manner of a magnet housing, which is formed here directly from the cup-shaped central part 12 made of ferromagnetic material, from a coaxial magnetic core, which is formed here by locating projection 22 of the upper part 11, also made of ferromagnetic material, from one surrounding the magnetic core 22
  • the electrical supply line to the magnet coil 23 is denoted by 37.
  • the magnet armature 24 has a coaxial stepped bore 25.
  • the smaller-diameter bore section 251 firmly encloses the valve needle 13, which extends through the larger-diameter bore section 252 with a smaller-diameter end section.
  • a compression spring 27 designed as a compression spring is supported, the other end of which rests against the annular end face of an adjusting tube 23 which is axially displaceable inside the hollow cylindrical element 11.
  • External thread section 29 on the adjustment tube 36 can be effected in an internal thread section 30 in the upper part 11, the bias of the return spring 27 can be adjusted.
  • a stroke stop is in the form of a
  • Crossbar 32 attached to the inside of the hollow cylindrical magnetic core 22.
  • the adjusting tube 23 in which the. Return spring 27 facing slotted end area and with this slotted end portion overlaps the transverse web 32 on both sides with play, as can be seen more clearly in FIG. 3.
  • the crossbar 32 carries a central, i.e. in the valve housing axis lying stop 33, which is formed by a bulge 34 on the end face of the transverse web 32 facing the valve needle 18. At this stop point 33, the end of the valve needle 18 strikes during the valve needle stroke.
  • the arrangement and design of magnet armature 24, crossbar 32 and valve needle 13 is such that when the front end of the valve needle 18 is in contact with the attachment point 33 on the crossbar 32 between the facing end face of
  • Magnetic armature 24 and magnetic core 22 a residual air gap 35 remains, as can be seen in the enlarged illustration in FIG. 2.
  • the maximum stroke of the valve needle 18 is characterized by the distance h in Fig. 2.
  • the crossbar 32 and the adjusting tube 28 are made of non-magnetic material.
  • the stop surface of the valve needle on the transverse web 32 is always punctiform, even if the valve needle 18 is not exactly aligned with the axis of the valve housing 10. This means that even when the valve needle 13 is not exactly aligned, the valve needle stroke remains constant. Every time the fuel injection valve is opened, the exact same fuel injection quantity is sprayed out.
  • the hollow cylindrical magnet armature 24 carries at the end a radially inwardly projecting annular guide section 36 which is integral with the magnet armature 24. With this guide section 36 the Macnetanker 24 slides almost without play on the adjustment tube 23, whereby the magnet armature 24 is guided exactly outside the bocene area of the magnet housing or the central part 12. Additional guide means for the valve needle 18 can thus be omitted.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Fuel-Injection Apparatus (AREA)

Abstract

Une soupape d'injection de carburant pour systèmes d'injection de carburant dans des moteurs à combustion interne comprend une aiguille (18) sollicitée par un électro-aimant (20) contre un ressort de rappel (27) de façon à coopérer avec un siège (17) de soupape et de libérer et fermer une ouverture (16) de la soupape. Le ressort de rappel (27) s'appuie sur un induit (24) de l'électro-aimant (20) fermement assujetti a l'aiguille (18) de la soupape et sur un tuyau d'ajustage (28) axialement mobile à l'intérieur du noyau (22) de l'électro-aimant (20), par lequel le carburant parvient d'une tubulure d'arrivée (15) du carburant à l'orifice de soupape (16). Le moyeu de l'aiguille de soupape est délimité par une barrette transversale (32) avec une butée centrale (33) fixement agencée à l'intérieur du noyau (22) de l'aimant. Le tuyau d'ajustage (28) est fendu en longueur à son extrémité opposée au ressort de rappel (27) et chevauche avec jeu à cet endroit la barrette transversale (32). Le moyeu de l'aiguille de soupape (18) reste constant grâce à sa butée centrale sur la barrette transversale (32), même lorsque l'aiguille (18) de la soupape n'est pas alignée avec l'axe de la cage de la soupape.
EP90911533A 1989-09-22 1990-08-16 Soupape d'injection de carburant Expired - Lifetime EP0447502B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3931604A DE3931604A1 (de) 1989-09-22 1989-09-22 Kraftstoffeinspritzventil
DE3931604 1989-09-22

Publications (2)

Publication Number Publication Date
EP0447502A1 true EP0447502A1 (fr) 1991-09-25
EP0447502B1 EP0447502B1 (fr) 1992-12-23

Family

ID=6389942

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90911533A Expired - Lifetime EP0447502B1 (fr) 1989-09-22 1990-08-16 Soupape d'injection de carburant

Country Status (8)

Country Link
US (1) US5131599A (fr)
EP (1) EP0447502B1 (fr)
JP (1) JPH04501905A (fr)
KR (1) KR920701657A (fr)
BR (1) BR9006921A (fr)
DE (2) DE3931604A1 (fr)
HU (1) HUT58864A (fr)
WO (1) WO1991004407A1 (fr)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2365494B (en) * 1997-12-19 2002-05-15 Caterpillar Inc A solenoid assembly
RU2142064C1 (ru) * 1998-02-02 1999-11-27 ООО "Прецизика-сервис", Сухан Федор Федорович Электромагнитная форсунка для двигателя внутреннего сгорания
US6508418B1 (en) * 1998-05-27 2003-01-21 Siemens Automotive Corporation Contaminant tolerant compressed natural gas injector and method of directing gaseous fuel therethrough
US6431474B2 (en) 1999-05-26 2002-08-13 Siemens Automotive Corporation Compressed natural gas fuel injector having magnetic pole face flux director
US6405947B2 (en) 1999-08-10 2002-06-18 Siemens Automotive Corporation Gaseous fuel injector having low restriction seat for valve needle
US20090057446A1 (en) * 2007-08-29 2009-03-05 Visteon Global Technologies, Inc. Low pressure fuel injector nozzle
US7669789B2 (en) * 2007-08-29 2010-03-02 Visteon Global Technologies, Inc. Low pressure fuel injector nozzle
US20090090794A1 (en) * 2007-10-04 2009-04-09 Visteon Global Technologies, Inc. Low pressure fuel injector
US20090200403A1 (en) * 2008-02-08 2009-08-13 David Ling-Shun Hung Fuel injector
EP2333297B1 (fr) * 2009-12-11 2013-03-20 Continental Automotive GmbH Ensemble de soupape pour soupape d'injection et soupape d'injection
CN105804910B (zh) * 2016-03-19 2018-08-07 上海大学 一种高灵敏的柴油机喷油提前角传感器
US11603815B1 (en) 2021-11-04 2023-03-14 Standard Motor Products, Inc. Modular armature-needle assembly for fuel injectors

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE104450C1 (fr) *
SE105805C1 (fr) *
US4232830A (en) * 1978-11-01 1980-11-11 The Bendix Corporation Electromagnetic fuel injector
US4360161A (en) * 1979-01-29 1982-11-23 The Bendix Corporation Electromagnetic fuel injector
DE3878599T2 (de) * 1987-06-26 1993-09-23 Hitachi Automotive Eng Elektromagnetisches kraftstoffeinspritzventil.

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9104407A1 *

Also Published As

Publication number Publication date
WO1991004407A1 (fr) 1991-04-04
DE59000662D1 (de) 1993-02-04
HUT58864A (en) 1992-03-30
JPH04501905A (ja) 1992-04-02
DE3931604A1 (de) 1991-04-04
HU906832D0 (en) 1991-09-30
US5131599A (en) 1992-07-21
EP0447502B1 (fr) 1992-12-23
BR9006921A (pt) 1991-11-26
KR920701657A (ko) 1992-08-12

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