EP0028288B1 - Kraftstoffeinspritzdüse für Brennkraftmaschinen - Google Patents

Kraftstoffeinspritzdüse für Brennkraftmaschinen Download PDF

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Publication number
EP0028288B1
EP0028288B1 EP80104128A EP80104128A EP0028288B1 EP 0028288 B1 EP0028288 B1 EP 0028288B1 EP 80104128 A EP80104128 A EP 80104128A EP 80104128 A EP80104128 A EP 80104128A EP 0028288 B1 EP0028288 B1 EP 0028288B1
Authority
EP
European Patent Office
Prior art keywords
nozzle
pressure
valve slide
inflow line
fuel
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
EP80104128A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0028288A1 (de
Inventor
Ewald Dr. Dipl.-Ing. Eblen
Odon Dipl.-Ing. Kopse
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 AT80104128T priority Critical patent/ATE10666T1/de
Publication of EP0028288A1 publication Critical patent/EP0028288A1/de
Application granted granted Critical
Publication of EP0028288B1 publication Critical patent/EP0028288B1/de
Expired 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
    • F02M61/04—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
    • F02M61/10—Other injectors with elongated valve bodies, i.e. of needle-valve type
    • 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
    • F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
    • 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
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/44—Valves, e.g. injectors, with valve bodies arranged side-by-side
    • 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
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/46—Valves, e.g. injectors, with concentric valve bodies
    • 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
    • F02M45/00—Fuel-injection apparatus characterised by having a cyclic delivery of specific time/pressure or time/quantity relationship
    • F02M45/02—Fuel-injection apparatus characterised by having a cyclic delivery of specific time/pressure or time/quantity relationship with each cyclic delivery being separated into two or more parts
    • F02M45/04—Fuel-injection apparatus characterised by having a cyclic delivery of specific time/pressure or time/quantity relationship with each cyclic delivery being separated into two or more parts with a small initial part, e.g. initial part for partial load and initial and main part for full load
    • F02M45/08—Injectors peculiar thereto
    • F02M45/086—Having more than one injection-valve controlling discharge orifices

Definitions

  • the invention relates to a fuel injector according to the preamble of the main claim.
  • the actuator which is movable by an external force, is designed as a rotatably mounted cam disk, which acts mechanically on the nozzle needle via tappets and blocks one of the nozzle needles in the closed position in the end positions.
  • the stroke of the nozzle needles is limited in the intermediate positions of the cam disk, which is not desirable in all cases.
  • the known mechanical solution is subject to a large number of tolerances, so that an increased production outlay is necessary if the cam disk is also to be adjustable into an exactly defined intermediate position.
  • the fuel is conveyed from the injection pump to the two pressure spaces in the injection nozzle via two separate pressure lines.
  • the actuator for controlling the two pressure lines is arranged in the injection pump and is designed as a rotary slide valve which is displaceably but non-rotatably coupled to the pump piston. This design is complex because of the two pressure lines and also does not provide an intermediate position of the actuator designed as a rotary slide valve, in which both pressure chambers of the nozzle needles are connected to the pump pressure chamber without throttling.
  • the fuel injection nozzle according to the invention with the characterizing features of the main claim has the advantage over a known injection nozzle of the generic type that an exact, fast closing of the nozzle needles is ensured by the pressure relief of the pressure chambers practically simultaneously with the blocking. It is also advantageous that the actuator designed as a valve slide can be assigned a defined intermediate position, so that the actuator can unthrottled connect the two pressure spaces to the fuel supply line in one of its three defined positions, both nozzle needles being able to carry out their full stroke.
  • a short design of the injection nozzle results if the axis of the valve slide is arranged perpendicular to the axes of the nozzle needles and a connection for the inflow line.
  • FIG. 1 shows a fuel injection nozzle with the usual structure of nozzle holder 1, intermediate plate 2, nozzle body 3, union nut 4 and nozzle needles 5.
  • the nozzle needles 5 are loaded via spring plates 6 by closing springs 7.
  • the space 8 accommodating the spring 7 is relieved of pressure via a channel 9.
  • the invention relates to an injection nozzle with two nozzle needles 5 and correspondingly two closing springs 7, but only one spring space 8.
  • pressure spaces 11 are provided in the area of the pressure shoulder 10 of the nozzle needle, which have inflow channels 12 and 13 in the nozzle holder 1 are connected, which can be connected via a slide valve 14 to an inflow line 15, via which the fuel under high pressure is fed to the injection nozzle.
  • the upper part of the nozzle holder 1 is drawn rotated by 90 ° with respect to the lower part, in order to be able to show the pressure chambers 11 in the nozzle body 3 or the closing springs 7 in section and the inflow channels 12 and 13.
  • the slide valve 14 works with a slide 16 which is displaceable against the force of a return spring 17 by pressure fluid located in a space 18.
  • the pressure fluid is controlled depending on the engine parameters by means not shown, for example a solenoid valve, and supplied to the space 18 via a nipple 19.
  • the slide 16 is displaced more or less against the spring 17 and thereby creates various connections between the inflow line 15 and the inflow channels 12 and 13.
  • the reference numbers of the parts corresponding to the first exemplary embodiment are provided with two dashes as an index.
  • the two nozzle needles are arranged coaxially with one another, one nozzle needle 31 being received by a hollow needle 32.
  • the nozzle needle 31 has a pressure space 33 arranged between the needles
  • the hollow needle 32 has a pressure space 34 arranged between the hollow needle and the nozzle body 3 ".
  • the pressure space 34 is connected directly to the inlet channel 12", it serves as a connection between the inlet channel 13 "and the pressure chamber 33 has an annular groove 35 ′′ arranged in the nozzle body 3 ′′ and radial bores 36 arranged in the hollow needle 32, which connect the ring groove 35 to the pressure chamber 33.
  • the compression springs acting on the nozzle needles 31 and 32 are connected in parallel as in the first embodiment.
  • the closing spring 37 of the hollow needle 32 has a much larger diameter than the closing spring 38 of the inner needle 31, since the surface acting on the hollow needle 32 in the opening direction, which is acted upon by the supplied fuel, is, by design, considerably larger than that on the inner needle 31.
  • the pressure chambers 33 and 34 or the inflow channels 12 ′′ and 13 ′′ are hydraulically completely separated from one another.
  • the slide valve 14 "works in principle like the valve shown in the first exemplary embodiment. In contrast to this, however, it is arranged coaxially to the injector axis, since the fuel pressure connection is connected to the fuel supply line 15" transversely to the nozzle axis. In addition to the advantage of the small diameter of this exemplary embodiment, fewer channels are required for the leakage drainage, since the space 25 "receiving the spring 17" of the slide 16 "is connected directly to the spring space 8" via a bore 39. In contrast to the first exemplary embodiment, after a first stroke has been covered, the slide 16 "encounters a stop 42 loaded by a spring 41. Only when the pressure in the chamber 18" increases further (force) is the force of the spring 41 overcome and the slide 16 "now counteracts the force of both springs 17 "and 41 shifted into its end position.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)
EP80104128A 1979-10-31 1980-07-16 Kraftstoffeinspritzdüse für Brennkraftmaschinen Expired EP0028288B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT80104128T ATE10666T1 (de) 1979-10-31 1980-07-16 Kraftstoffeinspritzduese fuer brennkraftmaschinen.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19792943896 DE2943896A1 (de) 1979-10-31 1979-10-31 Kraftstoffeinspritzduese fuer brennkraftmaschinen
DE2943896 1979-10-31

Publications (2)

Publication Number Publication Date
EP0028288A1 EP0028288A1 (de) 1981-05-13
EP0028288B1 true EP0028288B1 (de) 1984-12-05

Family

ID=6084777

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80104128A Expired EP0028288B1 (de) 1979-10-31 1980-07-16 Kraftstoffeinspritzdüse für Brennkraftmaschinen

Country Status (5)

Country Link
US (1) US4356976A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
EP (1) EP0028288B1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
JP (1) JPS5675960A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
AT (1) ATE10666T1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
DE (2) DE2943896A1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Families Citing this family (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3266767D1 (en) * 1981-05-20 1985-11-14 Bosch Gmbh Robert Fuel injection nozzle for internal-combustion engines
DE3214040A1 (de) * 1982-04-16 1983-10-20 Volkswagenwerk Ag, 3180 Wolfsburg Kraftstoffeinspritzduese, insbesondere fuer einen schnellaufenden fahrzeug-dieselmotor
DE3151293A1 (de) * 1981-12-24 1983-07-07 Robert Bosch Gmbh, 7000 Stuttgart Kraftstoffeinspritzsystem fuer kraftstoffdirekteinspritzung bei brenn-kraftmaschinen
DE3236046C2 (de) * 1982-09-29 1986-03-20 Daimler-Benz Ag, 7000 Stuttgart Kraftstoffeinspritzdüse für Brennkraftmaschinen
DE3330774A1 (de) * 1983-08-26 1985-03-14 Robert Bosch Gmbh, 7000 Stuttgart Kraftstoffeinspritzeinrichtung mit vor- und haupteinspritzung bei brennkraftmaschinen
DE3425460A1 (de) * 1983-08-26 1985-03-07 Robert Bosch Gmbh, 7000 Stuttgart Kraftstoffeinspritzeinrichtung zur definierten vor- und haupteinspritzung bei brennkraftmaschinen
NL8500339A (nl) * 1985-02-07 1986-09-01 Philips Nv Adaptief responderend systeem.
DE4115477C2 (de) * 1990-05-17 2003-02-06 Avl Verbrennungskraft Messtech Einspritzdüse für eine Brennkraftmaschine
DE4115478C2 (de) * 1990-05-17 1999-05-12 Avl Verbrennungskraft Messtech Einspritzdüse für eine Brennkraftmaschine
DE4432686C2 (de) * 1994-09-14 1996-09-05 Man B & W Diesel Ag Querschnittgesteuerte Einspritzdüse
AT408132B (de) * 1995-09-14 2001-09-25 Avl Verbrennungskraft Messtech Speichereinspritzsystem für eine brennkraftmaschine
DE19630204B4 (de) * 1996-07-26 2005-04-14 Man B & W Diesel Ag Kraftstoffeinspritzvorrichtung
DE10040738B4 (de) * 1999-08-19 2012-12-13 Avl List Gmbh Einspritzeinrichtung für eine Brennkraftmaschine mit einer als Doppelnadeldüse ausgeführten Einspritzdüse
GB9920144D0 (en) * 1999-08-26 1999-10-27 Lucas Industries Ltd Fuel injector
DE10141678A1 (de) * 2001-08-25 2003-05-08 Bosch Gmbh Robert Kraftstoffeinspritzeinrichtung für eine Brennkraftmaschine
DE10357769B4 (de) 2003-12-10 2007-06-21 Siemens Ag Kraftstoffeinspritzventil
US8069835B2 (en) * 2005-03-09 2011-12-06 Caterpillar Inc. Internal combustion engine and operating method therefor
FI119030B (fi) * 2005-04-28 2008-06-30 Waertsilae Finland Oy Polttomoottorin polttoaineen syöttölaitteiston ohjausjärjestelmä
US7556017B2 (en) * 2006-03-31 2009-07-07 Caterpillar Inc. Twin needle valve dual mode injector
FR2913465B1 (fr) * 2007-03-07 2009-11-20 Peugeot Citroen Automobiles Sa Injecteur de carburant et procede de mise en oeuvre de l'injecteur.
FI20115418A0 (fi) * 2011-05-03 2011-05-03 Waertsilae Finland Oy Polttoaineenruiskutusyksikkö ja-järjestelmä
FI123474B (en) * 2012-01-19 2013-05-31 Waertsilae Finland Oy Fuel injection system
US9046067B2 (en) * 2012-09-28 2015-06-02 Caterpillar Inc. Dual fuel injector with off set check biasing springs
US9175651B2 (en) * 2013-08-19 2015-11-03 Caterpillar Inc. Dual fuel system for internal combustion engine and leakage limiting seal strategy for same
US20140346254A1 (en) * 2014-08-07 2014-11-27 Caterpillar Inc. Fuel injector for gaseous injection

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE724535C (de) * 1938-04-24 1942-08-28 Kloeckner Humboldt Deutz Ag Brennstoff-Einspritzvorrichtung
US2727498A (en) * 1953-02-25 1955-12-20 Cummins Engine Co Inc Fuel supply apparatus for an internal combustion engine
DE1808650A1 (de) * 1968-11-13 1970-06-18 Bosch Gmbh Robert Kraftstoffeinspritzvorrichtung
DE2121121C3 (de) * 1971-04-29 1979-01-25 Robert Bosch Gmbh, 7000 Stuttgart Kraftstoffeinspritzdüse für Brennkraftmaschinen
JPS545813Y2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) * 1971-05-26 1979-03-15
FR2145080A5 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) * 1971-07-08 1973-02-16 Peugeot & Renault
DE2325822A1 (de) * 1972-05-30 1973-12-13 List Hans Einspritzduese fuer brennkraftmaschinen
DD102198A1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) * 1973-02-02 1973-12-05
DE2513588A1 (de) * 1975-03-27 1976-10-07 Daimler Benz Ag Einspritzduese fuer eine luftverdichtende brennkraftmaschine mit direkteinspritzung
DE2656276A1 (de) * 1976-12-11 1978-06-15 Orange Gmbh & Co Kg L Einspritzsystem fuer selbstzuendende brennkraftmaschinen
CH623114A5 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) * 1977-09-01 1981-05-15 Sulzer Ag

Also Published As

Publication number Publication date
ATE10666T1 (de) 1984-12-15
DE2943896A1 (de) 1981-05-14
JPH0154550B2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1989-11-20
EP0028288A1 (de) 1981-05-13
US4356976A (en) 1982-11-02
JPS5675960A (en) 1981-06-23
DE3069751D1 (en) 1985-01-17

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