EP0513037B1 - Soupape a commande electromagnetique - Google Patents

Soupape a commande electromagnetique Download PDF

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Publication number
EP0513037B1
EP0513037B1 EP91902298A EP91902298A EP0513037B1 EP 0513037 B1 EP0513037 B1 EP 0513037B1 EP 91902298 A EP91902298 A EP 91902298A EP 91902298 A EP91902298 A EP 91902298A EP 0513037 B1 EP0513037 B1 EP 0513037B1
Authority
EP
European Patent Office
Prior art keywords
valve
fuel
injection
inlet pipe
magnetic coil
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
EP91902298A
Other languages
German (de)
English (en)
Other versions
EP0513037A1 (fr
Inventor
Peter Romann
Ferdinand Reiter
Rudolf Babitzka
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
Priority to EP94101334A priority Critical patent/EP0602001B1/fr
Publication of EP0513037A1 publication Critical patent/EP0513037A1/fr
Application granted granted Critical
Publication of EP0513037B1 publication Critical patent/EP0513037B1/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
    • 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
    • F02M51/005—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
    • F02M51/0625—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
    • F02M51/0682—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 body being hollow and its interior communicating with the fuel flow
    • 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
    • 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
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49002—Electrical device making
    • Y10T29/4902—Electromagnet, transformer or inductor

Definitions

  • the invention relates to an electromagnetically actuated valve according to the preamble of patent claim 1.
  • a valve is also known, the solenoid of which is provided with a plastic coating and which is surrounded by the metal valve housing. Connection pins of the solenoid protrude from the valve housing and are enclosed by a plastic sheathing forming the connector.
  • valve according to the invention with the characterizing features of claim 1 has the advantage of simple manufacture and assembly, which allows inexpensive series production, since only one valve overmolding tool is required for various embodiments of the electrical connector. As a result, there is greater flexibility in assembly. Another advantage is that the magnetic coil is easy to handle and electrical connector existing plastic injection molding.
  • an axial gap is formed between the end face of the core end facing the armature and a shoulder of the intermediate part, in which, by clamping, a stroke which forms a residual air gap between the inlet-side end face of the armature and the core end, the stroke of the valve closing body during the opening process the valve-limiting non-magnetic stop disc is arranged.
  • the fuel inlet connector has a constant outer diameter over its entire length.
  • cylindrical valve seat body has a constant outer diameter.
  • a valve with the features of claim 6 enables a compact, short design of the valve.
  • FIG. 1 shows an exemplary embodiment of a valve designed according to the invention
  • FIG. 2 shows the independent plastic injection-molded part consisting of a magnetic coil and an electrical connector.
  • the electromagnetically actuated valve for example shown in FIG. 1, in the form of an injection valve for fuel injection systems of internal combustion engines, has a fuel inlet connection 1, which is surrounded by a magnet coil 4 and serves as the core, and which has a constant outer diameter, for example by means of centerless loops, over its entire length for the best possible use of space .
  • the magnet coil 4 with a coil body 2, as shown in FIG. 2 is provided with a plastic coating 7, at the same time an electrical connector plug 21 is also molded, so that there is an independent plastic injection part containing the magnet coil 4 and the connector plug 21.
  • the magnet coil 4 which has a stepped coil body 2 in the radial direction with a winding 13 which is stepped in the radial direction, in conjunction with the fuel inlet connector 1 having a constant outer diameter, enables a short and compact structure of the injection valve, as will be explained below.
  • a tubular metallic intermediate part 6 is connected by welding concentrically to a longitudinal valve axis 5 and partially overlaps the core end 3 with an upper cylinder section 41 axially.
  • the stepped bobbin 2 partially overlaps the fuel inlet connector 1 and, with a step 42 of larger diameter, the cylinder section 41 of the intermediate part 6.
  • the intermediate section 6 is provided at its end facing away from the fuel inlet connector 1 with a lower cylinder section 43 which engages over a tubular connecting part 14 and with it is tightly connected by welding.
  • a cylindrical valve seat body 8 is tightly mounted by welding. The lining up of fuel inlet connector 1, intermediate part 6, connecting part 14 and valve seat body 8 thus represents a rigid metal unit.
  • the valve seat body 8 has a constant outer diameter, for example formed by centerless grinding, so that the valve seat body 8 can be fully inserted into the connecting part 14 can and through the longer coverage better tightness between valve seat body 8 and the inner bore 30 of the connecting part 14 is achieved.
  • a tubular armature 12 is connected by welding, which is guided by a guide collar 15 of the intermediate part 6.
  • a valve closing body 10 which interacts with the valve seat 9 of the valve seat body 8, is connected to the latter, for example by soldering or welding, which is designed, for example, as a ball.
  • At least one spray opening 33 Downstream of the valve seat 9, at least one spray opening 33, for example formed by eroding, is formed in the valve seat body 8.
  • the weld seam 35 between the valve seat body 8 and the connecting part 14 is from the spray opening (s) 33 and relatively far away from the valve seat 9, so that an influence on quantity and leakage due to a distortion of the valve seat body 8 occurring due to the high temperatures occurring during welding is effectively prevented.
  • an axial gap 29 is formed, in which, by clamping, a residual air gap between the inlet-side end face 26 of the armature 12 and the end face 23 of the core end 3 forming, the stroke of the valve closing body 10 during the opening process of the valve limiting non-magnetic stop disc 27 is arranged.
  • the clamped stop disc 27 protects the end face 23 of the core end 3 because of its greater bending stiffness better from wear than a loose disc, in which there is a risk of tilting and uneven striking.
  • the magnet coil 4 is surrounded by at least one guide element 16, which is designed as a bracket in the exemplary embodiment and serves as a ferromagnetic element, which extends in the axial direction over the entire length of the magnet coil 4 and at least partially surrounds the magnet coil 4 in the circumferential direction and with one end thereof Fuel inlet connector 1 and with its other end on the connecting part 14 and z. B. is connected by welding.
  • a part of the valve is enclosed by a plastic sheathing 18, which extends axially from the fuel inlet connector 1, extends axially via the magnetic coil 4 with connector 21 and the at least one guide element 16, and thereby radially extending side faces of an annular groove provided on the circumference of the inlet-side end 44 of the fuel inlet connector 1 25 forms.
  • the bottom of the groove which for example has a sealing ring 45, has an annular groove 25 formed by the circumference of the fuel inlet port 1.
  • the plastic casing 18 engages in a holding groove 46 at the inlet end 44 of the fuel inlet connector 1.
  • the described plastic encapsulation 7 of the solenoid 4 in connection with the injection molded connector 21 allows a high degree of flexibility in the assembly of differently designed valves, since only one extrusion tool is required for connecting connectors 21 and solenoids 4 of different design to produce the plastic casing 18.
  • the magnet coil 4 which has the coil body 2 stepped in the radial direction with the winding 13 stepped in the radial direction, enables a compact and short design of the valve by projecting beyond the upper cylinder section 41 of the intermediate part 6 and thus causing the individual parts to be interleaved.

Abstract

Dans les soupapes à commande électromagnétique proposées comportant une tubulure d'admission du carburant entourée d'une bobine magnétique et servant de noyau, une partie au moins de la soupape est entourée d'un revêtement en matière plastique dans lequel est enrobée une prise de raccordement électrique. Selon la forme de la prise de raccordement électrique, différents outils de recouvrement de la soupape par extrusion sont cependant nécessaires. Avec la nouvelle soupape, on effectue, en même temps que le recouvrement par extrusion de la bobine magnétique (4), un moulage par injection de la prise de raccordement électrique (21) et on produit ainsi une pièce d'un seul tenant en matière plastique moulée par injection. Pour différentes formes de la prise de raccordement électrique, un seul outil de recouvrement de la soupape par extrusion suffit, ce qui permet une plus grande souplesse dans la chaîne de montage. La soupape peut être employée comme soupape d'injection pour les systèmes d'injection de carburant.

Claims (6)

  1. Soupape à commande électromagnétique, notamment soupape d'injection pour installation d'injection de carburant de moteurs à combustion interne, avec une tubulure d'admission de carburant (1) entourée par une bobine magnétique (4) et jouant le rôle de noyau, avec une armature (12) grâce à laquelle un corps de fermeture de soupape (10) coopérant avec un siège de soupape fixe (9) est susceptible d'être actionné, avec une partie métallique intermédiaire (6) en forme de tube qui, par une de ses extrémités est assemblée de façon étanche avec une extrémité (3), tournée vers l'armature (12), de la tubulure d'admission de carburant (1) et qui par son autre extrémité est assemblée de façon étanche avec une pièce d'assemblage (14) en forme de tube, avec un corps métallique de siège de soupape (8) comportant le siège de soupape fixe (9) et fixé à la partie d'assemblage (14) à l'extrémité de celle-ci opposée à la partie intermédiaire (6), avec au moins un élément conducteur (16) revêtant la forme d'une tôle recourbée et jouant le rôle d'élément ferromagnétique, qui s'étend en direction axiale au-delà de la longueur totale de bobine magnétique (4) et entoure cette bobine magnétique (4) au moins partiellement en direction périphérique, avec une enveloppe en matière plastique (18) entourant tout au moins une partie de la soupape, et avec une fiche de raccordement électrique (21), soupape caractérisée en ce que la bobine magnétique (4) est entourée par injection d'un revêtement en matière plastique (7) formant en même temps la fiche de raccordement électrique (21), de sorte que la bobine magnétique (4) conjointement avec la fiche de raccordement (21) est conçue sous la forme d'une pièce autonome moulée par injection et est en outre entourée par l'enveloppe (18) en matière plastique.
  2. Soupape selon la revendication 1, caractérisée en ce qu'à la périphérie de l'extrémité côté arrivée (44) de la tubulure d'admission de carburant (1), est prévue une gorge annulaire (25) dont les surfaces latérales s'étendant radialement sont formées par l'enveloppe en matière plastique (18) entourant une partie de la soupape, et dont le fond est formé par la périphérie de la tubulure d'admission de carburant (1).
  3. Soupape selon la revendication 1 ou la revendication 2, caractérisée en ce qu'entre une face frontale (23) de l'extrémité du noyau (3) tournée vers l'armature (12) et un épaulement (24) de la pièce intermédiaire (6) est ménagé un interstice axial (29) dans lequel est disposée par pincement une rondelle non magnétique de butée (27) formant un entrefer d'air résiduel entre la face frontale côté arrivée (26) de l'armature (12) et l'extrémité du noyau (3), et limitant la course du corps de fermeture de soupape (10) lors du processus d'ouverture de la soupape.
  4. Soupape selon une des revendications 1 à 3, caractérisée en ce que la tubulure d'admission de carburant (1) a sur toute sa longueur un diamètre externe constant.
  5. Soupape selon une des revendications 1 à 4, caractérisée en ce que le corps de siège de soupape (8) a un diamètre externe constant.
  6. Soupape selon la revendication 1, caractérisée en ce que la bobine magnétique (4) comporte un corps de bobine (2) étagé en direction radiale avec un enroulement (13) étagé en direction radiale.
EP91902298A 1990-02-03 1991-01-21 Soupape a commande electromagnetique Expired - Lifetime EP0513037B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP94101334A EP0602001B1 (fr) 1990-02-03 1991-01-21 Injecteur à commande électromagnétique

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4003228 1990-02-03
DE4003228A DE4003228A1 (de) 1990-02-03 1990-02-03 Elektromagnetisch betaetigbares ventil
PCT/DE1991/000050 WO1991011611A2 (fr) 1990-02-03 1991-01-21 Soupape a commande electromagnetique

Related Child Applications (1)

Application Number Title Priority Date Filing Date
EP94101334.4 Division-Into 1994-01-29

Publications (2)

Publication Number Publication Date
EP0513037A1 EP0513037A1 (fr) 1992-11-19
EP0513037B1 true EP0513037B1 (fr) 1994-09-28

Family

ID=6399369

Family Applications (2)

Application Number Title Priority Date Filing Date
EP94101334A Expired - Lifetime EP0602001B1 (fr) 1990-02-03 1991-01-21 Injecteur à commande électromagnétique
EP91902298A Expired - Lifetime EP0513037B1 (fr) 1990-02-03 1991-01-21 Soupape a commande electromagnetique

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP94101334A Expired - Lifetime EP0602001B1 (fr) 1990-02-03 1991-01-21 Injecteur à commande électromagnétique

Country Status (9)

Country Link
US (3) US5275341A (fr)
EP (2) EP0602001B1 (fr)
JP (2) JP2986542B2 (fr)
KR (1) KR0185731B1 (fr)
BR (1) BR9105985A (fr)
DE (3) DE4003228A1 (fr)
ES (2) ES2086971T3 (fr)
RU (1) RU2092735C1 (fr)
WO (1) WO1991011611A2 (fr)

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JPH10122085A (ja) 1998-05-12
ES2062761T3 (es) 1994-12-16
JPH05503976A (ja) 1993-06-24
US6341412B1 (en) 2002-01-29
EP0602001A2 (fr) 1994-06-15
KR0185731B1 (ko) 1999-03-20
DE59103119D1 (de) 1994-11-03
DE4003228C2 (fr) 1992-11-26
EP0602001B1 (fr) 1996-04-10
WO1991011611A3 (fr) 1991-09-19
JP2986542B2 (ja) 1999-12-06
RU2092735C1 (ru) 1997-10-10
ES2086971T3 (es) 1996-07-01
EP0513037A1 (fr) 1992-11-19
DE59107672D1 (de) 1996-05-15
US5580001A (en) 1996-12-03
WO1991011611A2 (fr) 1991-08-08
EP0602001A3 (fr) 1994-11-17
DE4003228A1 (de) 1991-08-22
BR9105985A (pt) 1992-11-10
KR920703997A (ko) 1992-12-18
US5275341A (en) 1994-01-04
JP3027353B2 (ja) 2000-04-04

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