EP1383999B1 - Dispositif d'injection de carburant pour moteur a combustion - Google Patents

Dispositif d'injection de carburant pour moteur a combustion Download PDF

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Publication number
EP1383999B1
EP1383999B1 EP02740251A EP02740251A EP1383999B1 EP 1383999 B1 EP1383999 B1 EP 1383999B1 EP 02740251 A EP02740251 A EP 02740251A EP 02740251 A EP02740251 A EP 02740251A EP 1383999 B1 EP1383999 B1 EP 1383999B1
Authority
EP
European Patent Office
Prior art keywords
section
accumulator piston
accumulator
space
fuel injection
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
EP02740251A
Other languages
German (de)
English (en)
Other versions
EP1383999A2 (fr
Inventor
Gérard Duplat
Raphael Pourret
Peter Voigt
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 EP1383999A2 publication Critical patent/EP1383999A2/fr
Application granted granted Critical
Publication of EP1383999B1 publication Critical patent/EP1383999B1/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
    • F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
    • F02M59/20—Varying fuel delivery in quantity or timing
    • F02M59/36—Varying fuel delivery in quantity or timing by variably-timed valves controlling fuel passages to pumping elements or overflow passages
    • F02M59/366—Valves being actuated 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
    • 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
    • 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
    • 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
    • F02M57/02—Injectors structurally combined with fuel-injection pumps
    • F02M57/022—Injectors structurally combined with fuel-injection pumps characterised by the pump drive
    • F02M57/023—Injectors structurally combined with fuel-injection pumps characterised by the pump drive mechanical
    • 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
    • F02M61/205—Means specially adapted for varying the spring tension or assisting the spring force to close the injection-valve, e.g. with damping of valve lift
    • 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
    • F02M2200/30—Fuel-injection apparatus having mechanical parts, the movement of which is damped
    • F02M2200/304—Fuel-injection apparatus having mechanical parts, the movement of which is damped using hydraulic 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
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/40—Fuel-injection apparatus with fuel accumulators, e.g. a fuel injector having an integrated fuel accumulator
    • 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
    • F02M2200/50—Arrangements of springs for valves used in fuel injectors or fuel injection pumps
    • F02M2200/505—Adjusting spring tension by sliding spring seats

Definitions

  • the pump working chamber 22 is supplied with fuel from a fuel reservoir 24 during the suction stroke of the pump piston 18, for example by means of a feed pump.
  • the pump working space 22 has a connection with a discharge space, for example, can serve as the fuel tank 24, and which is controlled by an electrically controlled valve 23.
  • the electrically controlled valve 23 is connected to a control device 25.
  • the fuel injection valve 12 has a valve body 26, which may be designed in several parts, and which is connected to the pump body 14.
  • an injection valve member 28 is guided longitudinally displaceably in a bore 30.
  • the bore 30 extends at least approximately parallel to the cylinder 16 of the pump body 14, but may also extend inclined thereto.
  • the valve body 26 has at its end facing the combustion chamber of the cylinder of the internal combustion engine at least one, preferably a plurality of injection openings 32.
  • the injection valve member 28 has at its end region facing the combustion chamber, for example, a conical sealing surface 34 which cooperates with a in the valve body 26 in the end region facing the combustion chamber, for example, also approximately conical valve seat 36, from or after the discharge the injection ports 32.
  • the accumulator piston 50 is activated by the force the closing spring 44 is held in its initial position against the pressure prevailing in the pump working chamber 22 when the force exerted by the pressure in the pump working chamber 22 on the accumulator piston 50 is less than the force of the closing spring 44.
  • the accumulator piston 50 is shown in its initial position in FIG.

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 (6)

  1. Installation d'injection de carburant pour un moteur à combustion interne comprenant :
    - une pompe à carburant haute pression (10) et un injecteur de carburant (12) pour un cylindre du moteur à combustion interne, la pompe à carburant haute pression (10) présentant un piston de pompe (18) entraîné par le moteur à combustion interne et délimitant une chambre de travail de pompe (22),
    - une soupape à commande électrique (23) commandant une communication de la chambre de travail de pompe (22) avec une chambre de détente (24),
    - l'injecteur de carburant (12) ayant un organe d'injection (28) commandant au moins un orifice d'injection (32) et mobile dans une direction d'ouverture par la pression régnant dans une chambre de pression (40) communiquant avec la chambre de travail de pompe (22) contre la force d'un ressort de fermeture (44),
    - le ressort de fermeture (44) s'appuyant d'une part au moins indirectement sur l'organe d'injection (28) et d'autre part au moins indirectement sur un piston d'accumulation coulissant (50), qui est soumis à la pression régnant dans la chambre de travail de pompe (22) sur sa face située à l'opposé du ressort de fermeture (44),
    - le piston d'accumulation (50) mobile dans une chambre d'accumulation (54) contre la force du ressort de fermeture (44), à partir d'une position initiale, ayant son mouvement de course d'évitement dans la chambre d'accumulateur (54) limité par une butée (53), et le piston d'accumulation (50) présentant une partie de tige (62) guidée dans un alésage de communication entre la chambre d'accumulation (54) et la chambre de travail de pompe (22), et une zone (55) disposée dans la chambre d'accumulation (54) avec une section transversale plus grande que la partie de tige (62), et
    - un amortissement du mouvement de course du piston d'accumulation (50) provoqué par une fente (68) entre la partie de tige (62) et l'alésage de communication (56),
    caractérisée en ce que
    la partie de tige (62) du piston d'accumulation (50) présente un segment de tige (64) avec une section transversale plus petite dans sa position initiale dans l'alésage de communication (56), et un segment de tige (63) avec une section transversale plus grande à l'extérieur de l'alésage de communication (56) en direction de la chambre de travail de pompe (22), et lors du mouvement de course d'évitement du piston d'accumulation (50) dans la chambre d'accumulation (54), son segment de tige (63) avec la section transversale plus grande plonge dans l'alésage de communication (56).
  2. Installation d'injection de carburant selon la revendication 1,
    caractérisée en ce que
    le segment de tige (63) dont la section transversale est plus grande ne plonge dans l'alésage de communication (56) qu'après une course d'évitement partielle (h1) du piston d'accumulation (50).
  3. Installation d'injection de carburant selon la revendication 1 ou 2,
    caractérisée en ce que
    lors du mouvement de course d'évitement du piston d'accumulation (50), la zone (55) du piston d'accumulation (50) disposée dans la chambre d'accumulation (54) est soumise à la pression aussi longtemps que le segment de tige (63) de section transversale plus grande est à l'extérieur de l'alésage de communication (56), et lorsque le segment de tige (63) de section transversale plus grande plonge dans l'alésage de communication (56), seule sa face de section transversale est soumise à la pression régnant dans la chambre de travail de pompe (22).
  4. Installation d'injection de carburant selon l'une quelconque des revendications 1 à 3,
    caractérisée en ce que
    la transition du segment de tige (63) de section transversale plus grande au segment de tige (64) de section transversale plus petite se produit sur une arête de commande (66) se terminant sur la surface latérale de la partie de tige (62).
  5. Installation d'injection de carburant selon l'une quelconque des revendications précédentes,
    caractérisée en ce que
    le segment de tige (64) de section transversale plus petite du piston d'accumulation (50) est formé, à partir du segment de tige (63) de section transversale plus grande, par au moins une partie aplatie (65) à la périphérie de la partie de tige (62).
  6. Installation d'injection de carburant selon la revendication 5,
    caractérisée en ce que
    le segment de tige (63) de section transversale plus grande du piston d'accumulation (50) a une forme au moins approximativement cylindrique.
EP02740251A 2001-04-21 2002-04-12 Dispositif d'injection de carburant pour moteur a combustion Expired - Lifetime EP1383999B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10119603A DE10119603A1 (de) 2001-04-21 2001-04-21 Kraftsotffeinspritzeinrichtung für eine Brennkraftmaschine
DE10119603 2001-04-21
PCT/DE2002/001367 WO2002086305A2 (fr) 2001-04-21 2002-04-12 Dispositif d'injection de carburant pour moteur a combustion

Publications (2)

Publication Number Publication Date
EP1383999A2 EP1383999A2 (fr) 2004-01-28
EP1383999B1 true EP1383999B1 (fr) 2006-06-14

Family

ID=7682229

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02740251A Expired - Lifetime EP1383999B1 (fr) 2001-04-21 2002-04-12 Dispositif d'injection de carburant pour moteur a combustion

Country Status (7)

Country Link
US (1) US6889661B2 (fr)
EP (1) EP1383999B1 (fr)
JP (1) JP2004519588A (fr)
DE (2) DE10119603A1 (fr)
HU (1) HUP0301200A2 (fr)
PL (1) PL359100A1 (fr)
WO (1) WO2002086305A2 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7900604B2 (en) * 2005-06-16 2011-03-08 Siemens Diesel Systems Technology Dampening stop pin
US7850580B2 (en) * 2007-12-07 2010-12-14 Johnson Health Tech Co., Ltd. Resistance exercise apparatus

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3041018C2 (de) * 1980-10-31 1986-03-20 Daimler-Benz Ag, 7000 Stuttgart Kraftstoffeinspritzeinrichtung für eine luftverdichtende Einspritzbrennkraftmaschine
DE3521428A1 (de) * 1985-06-14 1986-12-18 Robert Bosch Gmbh, 7000 Stuttgart Kraftstoffeinspritzvorrichtung fuer brennkraftmaschinen
DE3900762A1 (de) 1989-01-12 1990-07-19 Voest Alpine Automotive Kraftstoffeinspritzduese mit hohlem ausweichkolben
DE3900763C2 (de) * 1989-01-12 1994-05-19 Robert Bosch Ag Wien Kraftstoffeinspritzdüse, insbesondere Pumpedüse, für eine Brennkraftmaschine
WO1990008256A1 (fr) 1989-01-12 1990-07-26 Voest-Alpine Automotive Gesellschaft M.B.H. Injecteur de carburant
DE3907569A1 (de) * 1989-03-09 1990-09-13 Bosch Gmbh Robert Kraftstoff-einspritzduese fuer brennkraftmaschinen
DE4421714A1 (de) * 1994-06-21 1996-01-04 Bosch Gmbh Robert Kraftstoffeinspritzsystem
DE19940558C2 (de) * 1998-09-16 2003-11-20 Siemens Ag Vorrichtung zum Verzögern des Auslenkens der Düsennadel eines Kraftstoffeinspritzventils
DE10032924A1 (de) * 2000-07-06 2002-01-24 Bosch Gmbh Robert Kraftstoffeinspritzvorrichtung für Brennkraftmaschinen
DE20110130U1 (de) * 2001-06-19 2002-10-24 Bosch Gmbh Robert Kraftstoffeinspritzeinrichtung für eine Brennkraftmaschine

Also Published As

Publication number Publication date
DE10119603A1 (de) 2002-10-24
US20040025840A1 (en) 2004-02-12
WO2002086305A2 (fr) 2002-10-31
EP1383999A2 (fr) 2004-01-28
WO2002086305A3 (fr) 2003-01-03
DE50207204D1 (de) 2006-07-27
US6889661B2 (en) 2005-05-10
PL359100A1 (en) 2004-08-23
JP2004519588A (ja) 2004-07-02
HUP0301200A2 (en) 2003-08-28

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