EP0188746B1 - Dispositif pour l'injection de carburant dans une chambre de combustion d'un moteur à combustion interne - Google Patents

Dispositif pour l'injection de carburant dans une chambre de combustion d'un moteur à combustion interne Download PDF

Info

Publication number
EP0188746B1
EP0188746B1 EP85115989A EP85115989A EP0188746B1 EP 0188746 B1 EP0188746 B1 EP 0188746B1 EP 85115989 A EP85115989 A EP 85115989A EP 85115989 A EP85115989 A EP 85115989A EP 0188746 B1 EP0188746 B1 EP 0188746B1
Authority
EP
European Patent Office
Prior art keywords
contact
nozzle
ring
injection
check nut
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
Application number
EP85115989A
Other languages
German (de)
English (en)
Other versions
EP0188746A3 (en
EP0188746A2 (fr
Inventor
Bernhard Dipl.-Ing. Kaczynski
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 EP0188746A2 publication Critical patent/EP0188746A2/fr
Publication of EP0188746A3 publication Critical patent/EP0188746A3/de
Application granted granted Critical
Publication of EP0188746B1 publication Critical patent/EP0188746B1/fr
Expired legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23Q—IGNITION; EXTINGUISHING-DEVICES
    • F23Q7/00—Incandescent ignition; Igniters using electrically-produced heat, e.g. lighters for cigarettes; Electrically-heated glowing plugs
    • F23Q7/001—Glowing plugs for internal-combustion engines
    • 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
    • F02M53/00—Fuel-injection apparatus characterised by having heating, cooling or thermally-insulating means
    • F02M53/04—Injectors with heating, cooling, or thermally-insulating means
    • F02M53/06—Injectors with heating, cooling, or thermally-insulating means with fuel-heating means, e.g. for vaporising
    • 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
    • F02M57/00—Fuel-injectors combined or associated with other devices

Definitions

  • the invention relates to a device according to the preamble of the main claim.
  • the contact element is designed as a soldering point on a nozzle holder or a union nut of the injection nozzle or as a bare wire end or as a cable lug of a cable tail and connected to a conductor leading to the incandescent body, which is pressure-tight passed through the union nut or through a flange part carrying the incandescent body and clamped between the injection nozzle and a shoulder of the machine housing and to which a connection end of the incandescent body is soldered directly or via a further contact element.
  • the arrangement of a soldering support has the disadvantage that when removing the injection nozzle for the purpose of replacing the nozzle body or adjusting the injection pressure must be soldered.
  • a cable tail on the injection nozzle or a flange part carrying the incandescent body complicates the assembly if it emerges from the side of the union nut or the flange part and has to be passed through a bore in the machine housing.
  • the contact element is attached to an end face of a support element in the immediate vicinity of a fuel connection piece.
  • the power supply to the glow plug must be routed through the entire injection nozzle.
  • the direct juxtaposition of fuel and heating current connection can complicate assembly.
  • the arrangement according to the invention with the characterizing features of the main claim has the advantage that both a soldering point and a cable tail on the injection nozzle or on a flange part carrying the glow element is omitted and the external heating current supply by simple screwing, clamping or the like Contact ring trained contact element can be connected.
  • the contact ring is attached to the union nut upstream of a screw-in thread.
  • the contact ring is accessible from all sides even when the injector is installed, so that its entire contact surface can be used to make contact by using clamps or the like.
  • the mating contact element connected to the external heating current supply can be a contact pin, which is arranged radially to the injection nozzle in a bore in the machine housing and which presses resiliently or clamped against the contact ring.
  • the contact ring is expediently provided with a contact tab which projects into the area of a wall opening in the union nut and is connected there to a conductor element leading to the incandescent body.
  • FIG. 1 shows an enlarged partial longitudinal section through the injection nozzle of the first exemplary embodiment
  • FIG. 2 shows an enlarged partial longitudinal section through the second exemplary embodiment.
  • the injection nozzle according to FIG. 1 has a nozzle body 10, in which, as is known, a valve seat is formed and a valve needle is displaceably mounted.
  • the nozzle body 10 and an intermediate disk 12 limiting the stroke of the valve needle are clamped by a union nut 14 to a nozzle holder 16, in which u. a. a closing spring pressing the valve needle against the valve seat is accommodated.
  • the nozzle body 10 is provided with a conical wall section 18 which merges into a flat end wall 20.
  • the union nut 14 is extended on the combustion chamber side beyond the nozzle body 10 and is provided downstream of its end wall 20 with an inner support shoulder 22, against which an annealing insert, designated as a whole by reference number 24, bears.
  • this has a glow body 26 designed as a wire coil, which forms a passage 28 for the spray jets 30.
  • the incandescent body 26 is dimensioned such that the spray jets 30 the incandescent body by 26 do not wet, but cause an injector effect, through which air is sucked out of the combustion chamber into the interior of the incandescent body 26 or into the edge zones of the spray jets passing through the incandescent body 26.
  • the incandescent body 26 is surrounded by a metallic bush 32, which is fitted into a bore 34 of the union nut 14 and is provided with a flange 36 which bears against the support shoulder 22.
  • the bushing 32 has a flanged collar 38 which is folded outwards and holds the bushing 32 in the bore 34 without play.
  • the bushing 32 has an inwardly directed annular collar 40, which is provided with bores 42 and holds the end of the incandescent body 26 centered on the combustion chamber.
  • a first insulating body 44, a contact washer 46, a second insulating body 48 and a metallic holding washer 50 are successively attached to the flange 36 of the bushing 32 by gluing or soldering, an auxiliary tool centering the parts mutually.
  • the contact disk 46 is provided with bores 52 and an inner flanged collar 54 which contacts the upstream end of the incandescent body 26 and holds it in a centered manner.
  • the outer ring edge portion 50 of the contact disk 46 is drawn conically (cone 55) upwards.
  • a heat protection ring 56 is clamped, the conically raised outer ring edge 58 of which rests on the conical wall section 18 of the nozzle body 10.
  • the spray jets 30 passing through the incandescent body 26 produce an injector effect, through which air is sucked in from the combustion chamber through the bores 42 into an annular space 60 surrounding the incandescent body 26 and from there into the peripheral zones of the spray jets, in cooperation with the heating the glow body 26 gives a good mixture preparation.
  • a conductor element designated as a whole by reference number 62, which connects the contact disk 46 to a contact ring 64, which is fastened on the union nut 14 above a screw thread 66.
  • the conductor element 62 is formed over part of its length as a sleeve 68, the downstream edge section 69 of which is drawn in conically inwards in accordance with the design of the contact disk 46.
  • the sleeve 68 extends in an annular gap 74 which is formed between a section of the nozzle body 10 which is smaller in diameter and the wall of a first bore section 76 of the union nut 14. At a clamping shoulder 78, this merges into a second bore section 80, which comprises a larger diameter section of the nozzle body 10 with an annular gap 82, in which the contact tongues 72 extend.
  • the sleeve 68 and the contact tongues 72 are provided on the inside and outside with an insulating coating 84.
  • a pressure ring 88 is arranged, via which the union nut 14 clamps the nozzle body 10 and the washer 12 against the nozzle holder 16.
  • the pressure ring 88 three recesses 90 are provided, which are offset by 120 ° to each other, through which the contact tongues 72 with their bent portions 92 pass in an isolated manner.
  • the contact tongues 72 are connected to a ring web 94, which also has an insulating coating, and which extends over two 120 ° divisions. B. is recessed over the length of the third 120 ° division.
  • One of the contact tongues 72 corresponds to a wall opening 96 of the union nut 14, into which the free end of the contact tongue 72, which is slightly bent outwards, projects.
  • the contact ring 64 is molded into a ring sleeve 98 made of insulating material, which in turn is positively fastened on the union nut 14 above the screw thread 66.
  • a contact tab 99 is formed on the contact ring 64, which protrudes into the wall opening 96 of the union nut 14 and is soldered there to the one contact tongue 72 of the conductor element 62.
  • the contact ring 64 can also be provided with two or three contact tabs 99, which are connected to contact tongues 72 of the conductor element 62 in the region of further wall openings in the union nut 14.
  • the glow insert 24 When assembling the injection nozzle according to FIG. 1, the glow insert 24 is first prefabricated and connected to the conductor element 62 by soldering. Thereafter, the pressure ring 88 is inserted into the conductor element 62, temporarily widening the contact tongue ring until it bears against the bends 92. Subsequently, the glow insert 24 together with the conductor element 62 and the pressure ring 88 is inserted into the union nut 14, the flange collar 38 of the socket 32 is folded over and the contact tongue 72 is connected to the contact tab 99 of the contact ring 64. Through these operations, one connection end of the filament 26 is connected to the contact ring 64 and the other connection end of the filament 26 is contacted with ground.
  • the heat protection ring 56 is placed on the nozzle body 10 and then the union nut 14 'is put on the parts and screwed onto the nozzle holder 16. In this case, the heat protection ring 56 is clamped and the nozzle body 10 and the intermediate disk 12 are firmly connected to the nozzle holder 16 via the pressure ring 88.
  • the heat protection ring 56 seals the installation space of the incandescent body 26 against the annular gap 74, so that no additional sealing elements and measures have to be provided for this.
  • the conductor element 62 is an inherently rigid structure de that it can be handled well and integrated into the production process.
  • the annular web 94 gives the conductor element 62 a sufficiently high rigidity in the area of the contact tongues 72, without making the insertion of the pressure ring 88 noticeably more difficult.
  • the arrangement of the pressure ring 88 eliminates cutouts in the ring shoulder 78 for the passage of the contact tongues 72, which would require increased production costs.
  • the conductor element 62 can be connected to the glow insert 24 before it is installed in the union nut 14 and the forces exerted by the tensioned heat protection ring 56 on the glow insert 24 are received in a dimensionally stable manner by the support shoulder 22 of the union nut 14.
  • a contact pin 120 is provided, which is seated in a clamping nut 122, which is screwed into a threaded bore arranged radially to the receiving bore for the injection nozzle in the cylinder head 124 of the machine.
  • the contact pin 120 has an annular collar 126 which bears against an annular shoulder 130 of the clamping nut 122 with the interposition of an insulating disk 128.
  • an insulating bush 132 bears against the collar 126, against which a threaded piece 134 screwed into the head of the clamping nut 122 presses.
  • the contact pin 120 is fixed in the clamping nut 122 in an insulated manner via the threaded piece 134, and the necessary contact pressure between the contact pin 120 and the contact ring 106 is generated by tightening the clamping nut 122.
  • the heating current supply can be fastened to the end section of the contact pin 120 which projects freely from the clamping nut 122 by means of known connecting elements.

Landscapes

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

Claims (4)

1. Dispositif d'injection de carburant dans la chambre de combustion d'un moteur à combustion interne comportant un injecteur, qui possède un corps d'injecteur (10), lequel est serré par une bague de raccordement (14, 102) et, branché après l'injecteur, un élément incandescent (26) du passage pour le jet d'injection (30) entourant une des structures chauffables et dont une extrémité de liaison est reliée à une pièce de contact (64) isolée de la masse, qui sert au branchement d'une amenée de courant externe, caractérisé en ce que la pièce de contact est sous forme d'une bague de contact (64, 106) fixée à la périphérie de l'enveloppe de la bague de raccordement (14, 102) de préférence coaxialement à l'injecteur.
2. Dispositif selon la revendication 1, caractérisé en ce que le corps incandescent (26) est intégré dans la bague de raccordement (14, 102) prolongée vers l'extérieur par l'extrémité frontale du côté de la chambre de combustion du corps d'injecteur (10), et que la bague de contact (64, 106) est fixée sur la zone de la bague de raccordement (14, 102) entourant radialement le corps d'injecteur (10), (figure 2).
3. Dispositif selon la revendication 1, caractérisé en ce que la bague de contact (64) est fixée en amont d'un filetage (66) sur la bague de raccordement (14), (figure 1).
4. Dispositif selon l'une des revendications précédentes, caractérisé en ce que la bague de contact (64, 106) est munie d'une lamelle de contact (99, 110) qui pénètre à l'intérieur de la zone d'une brèche de paroi (96, 112) de la bague de raccordement (14, 102) et là, est reliée à un élément conducteur (46, 116) conduisant au corps incandescent (26).
EP85115989A 1985-01-23 1985-12-14 Dispositif pour l'injection de carburant dans une chambre de combustion d'un moteur à combustion interne Expired EP0188746B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19853502112 DE3502112A1 (de) 1985-01-23 1985-01-23 Einrichtung zum einspritzen von kraftstoff in einen brennraum einer brennkraftmaschine
DE3502112 1985-01-23

Publications (3)

Publication Number Publication Date
EP0188746A2 EP0188746A2 (fr) 1986-07-30
EP0188746A3 EP0188746A3 (en) 1987-04-15
EP0188746B1 true EP0188746B1 (fr) 1989-04-26

Family

ID=6260527

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85115989A Expired EP0188746B1 (fr) 1985-01-23 1985-12-14 Dispositif pour l'injection de carburant dans une chambre de combustion d'un moteur à combustion interne

Country Status (3)

Country Link
EP (1) EP0188746B1 (fr)
JP (1) JPS61169658A (fr)
DE (2) DE3502112A1 (fr)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DD228598A1 (de) * 1984-05-11 1985-10-16 Karl Marx Stadt Automobilbau Gluehkerzenanordnung, vorzugsweise fuer vorkammer-verbrennungsmotoren
DE3502098A1 (de) * 1985-01-23 1986-07-24 Robert Bosch Gmbh, 7000 Stuttgart Kraftstoff-einspritzduese fuer brennkraftmaschinen
DE3502109A1 (de) * 1985-01-23 1986-07-24 Robert Bosch Gmbh, 7000 Stuttgart Kraftstoff-einspritzduese fuer brennkraftmaschinen
DE3615635A1 (de) * 1986-05-09 1987-11-12 Bosch Gmbh Robert Kraftstoff-einspritzduese fuer brennkraftmaschinen
DE3615634A1 (de) * 1986-05-09 1987-11-12 Bosch Gmbh Robert Einrichtung zum einspritzen von kraftstoff in einen brennraum einer brennkraftmaschine
DE3617354A1 (de) * 1986-05-23 1987-11-26 Bosch Gmbh Robert Einrichtung zum einspritzen von kraftstoff in einen brennraum einer brennkraftmaschine
JP2801003B2 (ja) * 1987-06-26 1998-09-21 株式会社日立製作所 有機物除去装置
DE3731231A1 (de) * 1987-09-17 1989-03-30 Bosch Gmbh Robert Einrichtung zum einspritzen von kraftstoff in den brennraum einer brennkraftmaschine

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3307109A1 (de) * 1982-08-14 1984-03-15 Robert Bosch Gmbh, 7000 Stuttgart Einrichtung zum einspritzen von kraftstoff in brennraeume von insbesondere selbstzuendenen brennkraftmaschinen

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4245589A (en) * 1978-07-18 1981-01-20 Ryan Joseph C Exothermic injector adapter
GB2131539B (en) * 1982-12-02 1986-04-16 Lucas Ind Plc Electric starting aids for internal combustion engines

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3307109A1 (de) * 1982-08-14 1984-03-15 Robert Bosch Gmbh, 7000 Stuttgart Einrichtung zum einspritzen von kraftstoff in brennraeume von insbesondere selbstzuendenen brennkraftmaschinen

Also Published As

Publication number Publication date
DE3502112A1 (de) 1986-07-24
EP0188746A3 (en) 1987-04-15
EP0188746A2 (fr) 1986-07-30
JPS61169658A (ja) 1986-07-31
DE3569783D1 (en) 1989-06-01

Similar Documents

Publication Publication Date Title
EP0278229B1 (fr) Dispositif pour le contact électrique d'injecteurs de carburant à commande électromagnétique
EP0269641B1 (fr) Injecteur de carburant pour moteurs a combustion interne
EP0188746B1 (fr) Dispositif pour l'injection de carburant dans une chambre de combustion d'un moteur à combustion interne
EP0188744B1 (fr) Injecteur de combustible pour moteurs à combustion interne
EP0068339B1 (fr) Buse d'injection de carburant pour moteurs à combustion interne
EP0294586B1 (fr) Buse d'injection de combustible pour moteurs à combustion interne
EP0188745B1 (fr) Injecteur de carburant pour moteurs à combustion interne
EP0298962B1 (fr) Systeme d'injection de carburant dans des chambres de combustion d'un moteur a combustion interne
DE3502110C2 (fr)
EP1563519B1 (fr) Mise en contact electrique de fils laques fins d'enroulements secondaires de bobines d'allumage
DE3404710A1 (de) Einrichtung zum einspritzen von kraftstoff in brennraeume von brennkraftmaschinen
EP0267199B1 (fr) Dispositif d'injection de carburant dans la chambre de combustion d'un moteur a combustion interne
EP0981714B1 (fr) Bougie-crayon de prechauffage
DE3819974C1 (en) Standard unit with multipart housing body, especially fuel injection nozzle for internal combustion engines
DE19850519A1 (de) Zündvorrichtung für eine Brennkraftmaschine
DE102006042457A1 (de) Ausgerichtete Zündkerze
EP0266361B1 (fr) Methode de production d'un dispositif d'injection de carburant dans la chambre de combustion d'un moteur a combustion
DE3731231C2 (fr)
DE3725980C2 (de) Vorrichtung zur elektrischen Kontaktierung von elektromagnetisch betätigbaren Kraftstoffeinspritzventilen
DE3831989A1 (de) Einrichtung zum einspritzen von kraftstoff in den brennraum einer selbstzuendenden brennkraftmaschine
DE3502113A1 (de) Kraftstoff-einspritzduese fuer brennkraftmaschinen
EP0447659B1 (fr) Connecteur pour bougie d'allumage
DE3937750A1 (de) Kraftstoff-einspritzduese fuer brennkraftmaschinen
DE937261C (de) Befestigung einer aus mindestens zwei Teilen bestehenden Mittelelektrode von Zuendkerzen fuer Brennkraftmaschinen
DE8708226U1 (de) Kraftstoff-Einspritzdüse für Brennkraftmaschinen

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): DE FR GB IT

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): DE FR GB IT

17P Request for examination filed

Effective date: 19871006

17Q First examination report despatched

Effective date: 19880126

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE FR GB IT

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)
REF Corresponds to:

Ref document number: 3569783

Country of ref document: DE

Date of ref document: 19890601

ET Fr: translation filed
ITF It: translation for a ep patent filed

Owner name: STUDIO JAUMANN

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
ITTA It: last paid annual fee
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 19911203

Year of fee payment: 7

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 19911230

Year of fee payment: 7

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19920228

Year of fee payment: 7

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Effective date: 19921214

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 19921214

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Effective date: 19930831

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Effective date: 19930901

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST