EP0246220A1 - Buse d'injection pour moteurs à combustion interne en particulier pour moteurs diesel - Google Patents

Buse d'injection pour moteurs à combustion interne en particulier pour moteurs diesel Download PDF

Info

Publication number
EP0246220A1
EP0246220A1 EP87890095A EP87890095A EP0246220A1 EP 0246220 A1 EP0246220 A1 EP 0246220A1 EP 87890095 A EP87890095 A EP 87890095A EP 87890095 A EP87890095 A EP 87890095A EP 0246220 A1 EP0246220 A1 EP 0246220A1
Authority
EP
European Patent Office
Prior art keywords
valve
valve stem
injection nozzle
projections
stem
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
EP87890095A
Other languages
German (de)
English (en)
Other versions
EP0246220B1 (fr
Inventor
Hans Dipl.-Ing.Dr. List
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.)
AVL List GmbH
Original Assignee
AVL List GmbH
AVL Gesellschaft fuer Verbrennungskraftmaschinen und Messtechnik mbH
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 AVL List GmbH, AVL Gesellschaft fuer Verbrennungskraftmaschinen und Messtechnik mbH filed Critical AVL List GmbH
Publication of EP0246220A1 publication Critical patent/EP0246220A1/fr
Application granted granted Critical
Publication of EP0246220B1 publication Critical patent/EP0246220B1/fr
Expired legal-status Critical Current

Links

Images

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
    • F02M61/04—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
    • F02M61/08—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 the valves opening in direction of fuel flow
    • 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
    • F02M61/165—Filtering elements specially adapted in fuel inlets to injector
    • 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
    • F02M61/20—Closing valves mechanically, e.g. arrangements of springs or weights or permanent magnets; Damping of valve lift

Definitions

  • the invention relates to an injection nozzle for internal combustion engines, in particular diesel engines, with a poppet valve which consists of a valve disk and valve stem and which opens due to the fuel pressure in the flow direction with a very small stroke, the stroke of the poppet valve being limited by a stop which is in the vicinity of the valve disk is provided.
  • Such an injection nozzle is used for the uniform distribution of the fuel along the circumference of an at least approximately rotationally shaped combustion chamber, the injection nozzle being arranged approximately in the axis of the combustion chamber.
  • the fuel emerges from the injection nozzle in the form of a cone jacket with a very small wall thickness; it offers the little moving combustion air in the combustion chamber a very large target. As it moves against the circumference of the combustion chamber at high speed during injection, there is a strong friction between the fuel and the air, which splits the fuel into tiny droplets. The air is accelerated by the impulse of the fuel moving at high speed in the direction of the circumference of the combustion chamber according to the impact laws, which creates flows in the combustion chamber which are directed from the injection nozzle to the circumference and then lead from the circumference against the injection nozzle.
  • the angle of the fuel jacket in the combustion chamber and this itself must be coordinated so that one is the same moderate mixture of fuel and air occurs.
  • the opening angle of the injected fuel cone jacket is at least 90 °, preferably 120 to 160 °.
  • the stroke of the valve plate is accordingly very small, approximately in the order of magnitude of one or several hundredths of a millimeter.
  • valve stem has an area with a smaller cross section than the rest of the valve stem, following the valve disk. This area is relatively short and the shoulder closing this area serves as a second valve and at the same time as a limitation for the opening path of the valve disk.
  • an injection nozzle was known from DE-OS 31 39 948, in which, however, the stop limiting the stroke of the valve plate is at a very considerable distance from the valve plate.
  • the valve plate has a larger diameter than the valve stem, which has an annular groove immediately above the valve plate, in which transverse bores end, which establish a connection to a central blind bores through which the fuel can be supplied.
  • the stop is formed by a sleeve held in the upper region of the valve stem, which is acted upon by a spring and is supported via intermediate elements on an O-ring held on the valve stem.
  • This injector also has the disadvantage that the valve is only accessible when the injector is practically completely disassembled, which results in a correspondingly high level of maintenance.
  • due to the relatively large distance between the stop and the Valve seat an undesirable considerable thermal influence on the largest opening gap of the valve.
  • the aim of the invention is to propose an injection nozzle of the type mentioned at the outset which, while ensuring the largest opening gap, is distinguished by a simple structure and by a high degree of ease of maintenance.
  • this is achieved in that in the vicinity of the valve plate there are projections in the valve housing inwards and projections on the outside of the valve stem and their facing contact surfaces project from one another by the desired maximum valve lift when the valve is closed.
  • the stop can be easily manufactured with the necessary accuracy. Different thermal expansions from the valve stem and valve housing can only have a minor effect on the maximum valve lift.
  • An embodiment is advantageous in which the projections extend diametrically opposite each other over less than 90 degrees of angle and the axial coverage of these projections is achieved by turning the valve stem. This results in a simple design and simple installation option.
  • a plate spring which is arranged coaxially to the valve stem and which is supported on the one hand on the valve housing and on the other hand on nuts screwed onto the valve stem can be provided on the end of the valve stem opposite the valve stem.
  • the plate spring can also be used to secure the valve stem against rotation by, after a Another feature of the invention, on the one hand the valve stem with a flat and the plate spring with a corresponding recess and on the other hand a pin is provided to prevent rotation of the plate spring relative to the valve housing.
  • a filter for the fuel can be provided between the access of the fuel to the valve and the exit from the valve, which filter retains at least dirt particles that are larger than the maximum valve lift. This prevents clogging of the very small valve gap.
  • the fuel filter can be formed by alternately starting from an upper and a lower annular groove and ending in front of the other annular groove on the valve stem and a play of the valve stem in the valve housing, which is smaller than the maximum valve lift.
  • the injection nozzle according to the invention shown in Figures 1 to 3 consists of the valve housing 1, in which the valve stem 2 is axially slidably mounted with play. At at its lower end, the valve stem 2 has a valve disk 3 with a conical seat surface 4, the cone angle of which is denoted by 5 and is approximately 140 ° in the present example.
  • the injection nozzle is designed so that it opens in the direction of flow due to the pressure of the fuel supplied.
  • a plate spring consisting of two similar parts 6 and 7, which is said to be generally very rigid.
  • the upper part 8 of the valve stem 2 is provided with a thread, preferably a fine thread, and two nuts 9.
  • the maximum stroke of the valve is very small, about one to several hundredths of a millimeter. It is illustrated schematically in the drawing by dimension 10.
  • the stop which limits the maximum stroke 10 is formed by the outward projections 11 on the stem 2, on the one hand, and the inward projections 12 in the valve housing 1, on the other hand.
  • the valve stem 2 can be inserted into the valve housing 1 through corresponding recesses 13, which must be slightly larger than the projections 11, so that the projections 11 come to rest on the side of the projections 12 facing away from the valve plate 3.
  • the valve stem is now rotated 2 and 90 °, so that the projections 11 on the valve stem 2 and the projections 12 in the valve housing 1 overlap in the axial direction and in this way result in the stroke limitation.
  • the plate spring 7 is used, which has an opening 14 for the flattened 15 upper part of the valve stem 2 and is also prevented by the pin 16 from rotating relative to the valve housing 1.
  • the pressure pipe coming from the injection pump, not shown, is connected in the bore 17, from there the fuel is supplied via the bore 18 of the ring groove 19, which is arranged in the valve stem 2.
  • the fuel is supplied to the annular groove 21 via the valve disk 3.
  • the number of grooves 20 to be carried out axially is to be selected so that the distribution on the circumference is sufficient.
  • the leak fuel is supplied to the leak fuel drain 24 via the bore 23.
  • FIG. 4 shows an embodiment according to the invention, in which the upper contour of the inlet into the valve gap is rounded in contrast to the embodiment according to FIG. 1. In this way, the location of the highest fuel speed is moved in the vicinity of the exit of the jet, as a result of which a larger part of the pressure energy is converted into kinetic energy of the jet.
  • valve stem 2 differs from that of Figure 1 in that the axially extending grooves between the annular grooves 19 and 25 are not continuous, but that axial grooves 26 and 27 are provided, which alternate from the upper annular groove 19 and go out of the lower annular groove 25 and each end before the other annular groove.
  • the fuel is forced to take the path via the clearance between the valve stem 2 and the valve housing 1.
  • This game is dimensioned smaller than the maximum valve lift 10, so that dirt particles are retained which could clog the valve gap.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)
EP19870890095 1986-05-13 1987-05-12 Buse d'injection pour moteurs à combustion interne en particulier pour moteurs diesel Expired EP0246220B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT127786A AT395638B (de) 1986-05-13 1986-05-13 Einspritzduese fuer brennkraftmaschinen, insbesondere dieselmotoren
AT1277/86 1986-05-13

Publications (2)

Publication Number Publication Date
EP0246220A1 true EP0246220A1 (fr) 1987-11-19
EP0246220B1 EP0246220B1 (fr) 1989-09-27

Family

ID=3510402

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19870890095 Expired EP0246220B1 (fr) 1986-05-13 1987-05-12 Buse d'injection pour moteurs à combustion interne en particulier pour moteurs diesel

Country Status (3)

Country Link
EP (1) EP0246220B1 (fr)
AT (1) AT395638B (fr)
DE (1) DE3760630D1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2668545A1 (fr) * 1990-10-27 1992-04-30 Mtu Friedrichshafen Gmbh Injecteur de carburant pour moteurs a combustion interne.
DE4322313A1 (de) * 1993-07-05 1995-01-12 Kanis Paul Gerhard Dipl Ing Schwingstößeldüse
FR2763101A1 (fr) * 1997-05-07 1998-11-13 Bosch Gmbh Robert Injecteur de carburant pour moteur a combustion interne
WO2008058634A1 (fr) * 2006-11-14 2008-05-22 Purem Abgassysteme Gmbh & Co. Kg Dispositif de dosage d'agent de réduction et injecteur pour dispositif de dosage d'agent de réduction

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB400539A (en) * 1932-05-21 1933-10-26 Bosch Robert Improvements in or relating to fuel injection nozzles for internal combustion engines
US1985289A (en) * 1932-07-18 1934-12-25 Aerol Engine Corp Injector for internal combustion engines
GB539856A (en) * 1940-02-19 1941-09-26 Ex Cell O Corp Improvements in or relating to fuel-injection nozzles for internal-combustion engines
US2263197A (en) * 1939-03-08 1941-11-18 Eisemann Magneto Corp Fuel injection nozzle
DE933003C (de) * 1954-03-19 1955-09-15 Rudolf Dipl-Ing Schenk Einspritzventil fuer Brennkraftmaschinen
FR1169811A (fr) * 1956-04-16 1959-01-06 Mowag Motorwagenfabrik Ag Gicleur
DE1086487B (de) * 1955-03-22 1960-08-04 Borg Warner Kraftstoffeinspritzduese

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE475116C (de) * 1925-01-21 1929-04-19 Deckel Friedrich Verfahren und Vorrichtung zum Einspritzen von Brennstoff in Verbrennungskraftmaschinen
DE3139948A1 (de) * 1981-10-08 1983-04-28 Robert Bosch Gmbh, 7000 Stuttgart Kraftstoff-einspritzduese fuer brennkraftmaschinen
DE3410476A1 (de) * 1983-08-13 1985-02-21 Robert Bosch Gmbh, 7000 Stuttgart Kraftstoff-einspritzduese fuer brennkraftmaschinen

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB400539A (en) * 1932-05-21 1933-10-26 Bosch Robert Improvements in or relating to fuel injection nozzles for internal combustion engines
US1985289A (en) * 1932-07-18 1934-12-25 Aerol Engine Corp Injector for internal combustion engines
US2263197A (en) * 1939-03-08 1941-11-18 Eisemann Magneto Corp Fuel injection nozzle
GB539856A (en) * 1940-02-19 1941-09-26 Ex Cell O Corp Improvements in or relating to fuel-injection nozzles for internal-combustion engines
DE933003C (de) * 1954-03-19 1955-09-15 Rudolf Dipl-Ing Schenk Einspritzventil fuer Brennkraftmaschinen
DE1086487B (de) * 1955-03-22 1960-08-04 Borg Warner Kraftstoffeinspritzduese
FR1169811A (fr) * 1956-04-16 1959-01-06 Mowag Motorwagenfabrik Ag Gicleur

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2668545A1 (fr) * 1990-10-27 1992-04-30 Mtu Friedrichshafen Gmbh Injecteur de carburant pour moteurs a combustion interne.
DE4322313A1 (de) * 1993-07-05 1995-01-12 Kanis Paul Gerhard Dipl Ing Schwingstößeldüse
FR2763101A1 (fr) * 1997-05-07 1998-11-13 Bosch Gmbh Robert Injecteur de carburant pour moteur a combustion interne
WO2008058634A1 (fr) * 2006-11-14 2008-05-22 Purem Abgassysteme Gmbh & Co. Kg Dispositif de dosage d'agent de réduction et injecteur pour dispositif de dosage d'agent de réduction

Also Published As

Publication number Publication date
DE3760630D1 (en) 1989-11-02
AT395638B (de) 1993-02-25
EP0246220B1 (fr) 1989-09-27
ATA127786A (de) 1992-06-15

Similar Documents

Publication Publication Date Title
EP1073838B1 (fr) Soupape d'injection de carburant
DE60106668T2 (de) Kraftstoffeinspritzventil zur Erzeugung von Turbulenzen durch eine Einzelplatte
DE69203197T2 (de) Elektromagnetisch betätigbares Kraftstoffzerstäubungs- und Dosierventil für eine Kraftstoffansaugvorrichtung einer Brennkraftmaschine.
EP0918927B1 (fr) Soupape d'injection, notamment pour injecter du carburant directement dans la chambre de combustion d'un moteur a combustion interne
DE2710138A1 (de) Mehrloch-einspritzduese
EP0354905B1 (fr) Injecteur de carburant pour moteurs a combustion interne
DE10049518B4 (de) Brennstoffeinspritzventil
DE3013694A1 (de) Elektromagnetische kraftstoffeinspritzeinrichtung
DE19827220A1 (de) Kraftstoffeinspritzventil für einen Verbrennungsmotor
EP0171031A2 (fr) Dispositif d'injection de carburant pour un moteur à combustion interne
EP0656474A1 (fr) Injecteur de carburant pour moteurs à combustion interne
EP0484681B1 (fr) Dispositif d'injection d'un mélange de gaz et de carburant
EP1073837A1 (fr) Soupape d'injection de carburant
DE68905502T2 (de) Brennstoffeinspritzventil.
DE932209C (de) Kraftstoffeinspritzventil
DE3035453A1 (de) Elektromagnetische kraftstoffeinspritzvorrichtung
DE2652584B2 (de) Sprühvorrichtung zur Erzeugung eines pulsierenden Flüssigkeitsstrahls
DE19623713B4 (de) Einspritzventil, insbesondere zum direkten Einspritzen von Kraftstoff in einen Brennraum eines Verbrennungsmotors
DE2658783A1 (de) Luftverdichtende, direkt einspritzende brennkraftmaschine
DE19827218B4 (de) Kraftstoffeinspritzventil für einen Verbrennungsmotor
EP0246220B1 (fr) Buse d'injection pour moteurs à combustion interne en particulier pour moteurs diesel
EP0262197B1 (fr) Soupape d'injection pour moteurs a combustion interne
EP0611885A1 (fr) Soupape-injecteur à combustible pour un moteur à combustion interne
DE102009041028A1 (de) Düsenbaugruppe für ein Einspritzventil und Einspritzventil
EP0413173B1 (fr) Injecteur de combustible pour moteurs à combustion interne

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: A1

Designated state(s): DE FR IT

ITCL It: translation for ep claims filed

Representative=s name: MODIANO & ASSOCIATI S.R.L.

17P Request for examination filed

Effective date: 19871007

EL Fr: translation of claims filed
17Q First examination report despatched

Effective date: 19880518

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE FR IT

ET Fr: translation filed
REF Corresponds to:

Ref document number: 3760630

Country of ref document: DE

Date of ref document: 19891102

ITF It: translation for a ep patent filed
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: FR

Payment date: 19920527

Year of fee payment: 6

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

Ref country code: FR

Effective date: 19940131

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

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

Ref country code: DE

Payment date: 19950821

Year of fee payment: 9

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

Ref country code: DE

Effective date: 19970201

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

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20050512