EP1404964B1 - Injecteur de carburant a amenee de chambre de commande commutable - Google Patents

Injecteur de carburant a amenee de chambre de commande commutable Download PDF

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Publication number
EP1404964B1
EP1404964B1 EP02758062A EP02758062A EP1404964B1 EP 1404964 B1 EP1404964 B1 EP 1404964B1 EP 02758062 A EP02758062 A EP 02758062A EP 02758062 A EP02758062 A EP 02758062A EP 1404964 B1 EP1404964 B1 EP 1404964B1
Authority
EP
European Patent Office
Prior art keywords
valve
pressure
space
switching valve
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 - Lifetime
Application number
EP02758062A
Other languages
German (de)
English (en)
Other versions
EP1404964A2 (fr
Inventor
Friedrich Boecking
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 EP1404964A2 publication Critical patent/EP1404964A2/fr
Application granted granted Critical
Publication of EP1404964B1 publication Critical patent/EP1404964B1/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
    • F02M47/00—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure
    • F02M47/02—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure of accumulator-injector type, i.e. having fuel pressure of accumulator tending to open, and fuel pressure in other chamber tending to close, injection valves and having means for periodically releasing that closing pressure
    • F02M47/027—Electrically actuated valves draining the chamber to release the closing pressure
    • 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
    • F02M63/0012—Valves
    • F02M63/0031—Valves characterized by the type of valves, e.g. special valve member details, valve seat details, valve housing details
    • F02M63/004—Sliding valves, e.g. spool valves, i.e. whereby the closing member has a sliding movement along a seat for opening and closing
    • 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
    • F02M63/0012—Valves
    • F02M63/0031—Valves characterized by the type of valves, e.g. special valve member details, valve seat details, valve housing details
    • F02M63/0045—Three-way valves
    • 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
    • F02M63/0012—Valves
    • F02M63/0059—Arrangements of valve actuators
    • F02M63/0068—Actuators specially adapted for partial and full opening of the valves
    • 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
    • F02M2200/21—Fuel-injection apparatus with piezoelectric or magnetostrictive elements
    • 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
    • F02M2200/28—Details of throttles in fuel-injection apparatus

Definitions

  • DE 199 10 589 A1 refers to an injection valve for an internal combustion engine.
  • a servo valve which has a movable valve element.
  • the valve element comprises a throttle in the fuel path to the injection nozzle for the initial phase of the injection. Further, it has a piston-shaped shoulder over a groove which emerges from a bore in the main phase of injection and thereby releases a direct path for the fuel bypassing the throttle.
  • DE 197.44 518 A1 also relates to a fuel injection valve for internal combustion engines.
  • a valve body an axially displaceable valve member is arranged. This has at its the combustion chamber of the internal combustion engine facing the ends of a conical valve sealing surface, with which it has a conical valve seat surface in the valve body interacts.
  • the conical valve seat surface has on the valve member on a sealing edge forming annular edge.
  • at least one injection opening is provided in the combustion chamber of the internal combustion engine, in which, when the injection valve is closed, the region of the valve seat surface adjacent to the sealing edge is provided downstream.
  • the valve member has a guide bore, with which it is slidably guided on a pin of a stationary inserted in the valve body insert body.
  • a fuel injection valve in which a valve chamber of a three-way valve is selectively connected to a drain or a high-pressure line.
  • the high pressure line opens into a valve chamber of the switching valve.
  • valve member In this known from the prior art arrangement of a fuel injection valve very small actuating forces and thus very fast valve lift movements of the valve member of the injection valve are possible. These fast adjustment movements are made possible by the small hydraulically effective surfaces on the valve member and the small control volume, with only small moving masses are to be adjusted.
  • the valve member is provided with a guide bore, with which it is slidably guided on a pin of a stationary inserted into the valve body insert body.
  • a higher pressure rise speed can be achieved in the control chamber of the fuel injector.
  • a faster rise in pressure in the control chamber of the fuel injector causes a rapid movement of the nozzle needle from these and consequently a rapid closing of the injection openings at the combustion chamber end of the fuel injector.
  • the formation of soot in the combustion chamber of self-igniting internal combustion engines is significantly reduced.
  • a switching valve can be to increase the rate of pressure rise in the control chamber of the injector another, in addition to a permanently acting inlet throttle in a high pressure side inlet to the pressure build-up in the control room.
  • control chamber respectively associated permanent throttle pressure relief of the control chamber in the direction of flow of the fuel acts Leckagagereduplicd;
  • the throttling element provided in the discharge passage of the control space acts - in the opposite direction, i.e., in the opposite direction. seen in the direction of supply to the control room out - as inlet throttle for the control room.
  • the valve body of the switching valve can be in a switchable high-pressure side feed to the control room releasing or bring this closing position.
  • the nozzle needle / plunger arrangement in the injector body can be given a first or a second closing speed with which the injection chamber-side injection openings on the injector body are closed.
  • FIG. 1 is an injector with opening on the valve chamber of the switching valve, permanently effective high-pressure side inlet can be seen.
  • An injector body 1 of a fuel injector for injecting fuel into the combustion chamber of an internal combustion engine comprises a control chamber 2.
  • the control chamber 2 is delimited by a control chamber wall 3, a control chamber surface 4 and an end face 8 of a nozzle needle / plunger arrangement 6.
  • an outlet / inlet opening 9 surrounding a ring-shaped configured stop surface 5 is formed.
  • the nozzle needle / tappet arrangement 6 can be either a nozzle needle closing or releasing the injection openings at the combustion chamber end of the injector body 1, and also an indirect tappet actuating tappet.
  • the nozzle needle / plunger assembly 6 is imparted a movement according to the double arrow 7 in the injector body 1 of the fuel injector.
  • a flow channel 10 is the pressure-relieved or pressurizable, the nozzle needle / plunger assembly 6 actuated control chamber 2 in conjunction with a valve chamber 18 of a switching valve 16, which is preferably designed as a multi-way valve.
  • the flow channel 10 is formed in a cross section 15; in the flow channel 10, a first throttle element 13 is inserted.
  • the first throttle element 13 is formed in a substantially smaller cross section 14 in comparison to the cross sectional area 15 of the flow channel 10 Fig. 1 illustrated flow channel 10 is acted upon both in the inlet direction 11 of the fuel to the control chamber 2 and opposite thereto in the flow direction 12 of the fuel from the control chamber 2 to the valve chamber 18 of the switching valve 16.
  • the switching valve 16 preferably designed as a multi-way switching valve, is likewise integrated in the injector body 1.
  • the switching valve 16 comprises a valve body 17 which is surrounded by a valve chamber 18 in the injector body 1. Opposite one another, a first valve seat 19 and a second valve seat 20 are formed on the valve space.
  • the valve body 17 of the switching valve 16 is preferably formed as a spherically configured valve body and actuated via a transmission element 22 schematically indicated here.
  • the transmission element 22 is in operative connection with an actuator not shown here, be it a piezoelectric actuator or a mechanical-hydraulic translator, which the transmission element 22 a vertical movement corresponding double arrow 23 imparts, whereby the valve body 17 of the switching valve 16 respectively in the first valve seat 19 and ., the second valve seat 20 is adjustable.
  • an annular gap 21 is formed, from which at a branch point 25 is formed in the low pressure region of the fuel injection system extending drain 24.
  • a permanently acting high-pressure side inlet 28 Perpendicular to the direction of actuation 23 of the valve body 17 opens into the valve chamber 18 of the switching valve 16 is a permanently acting high-pressure side inlet 28, in the line cross section, a second throttle element 26 is integrated. Since this high-pressure side inlet is oriented perpendicular to the actuation direction of the valve body 17 in the valve chamber 18, the permanently acting high-pressure side inlet 28 is not closed upon actuation of the valve body 17 of the switching valve 16, so that the pending there pressure permanently on the flow channel 10 and thus in the control chamber 2 is present ,
  • the transmission element 22 opposite, opens in the region of the second valve seat 20 below the adjustable in the valve chamber 18 valve body 17, another high pressure side inlet 29 from a high pressure source, not shown here, be it a high-pressure pump or a high-pressure accumulator (common rail) with integrated third throttle element 27.
  • a high pressure source not shown here, be it a high-pressure pump or a high-pressure accumulator (common rail) with integrated third throttle element 27.
  • high-pressure side inlet is closed when placed in the second valve seat 20 valve body 17, so that the control chamber 2 in the inlet direction 11 only via the opening into the valve chamber 18 of the switching valve 16, permanently acting high pressure side inlet 28 with control volume is charged.
  • the underlying idea is a pressure relief of the control chamber 2 when placed in the second valve seat 20 valve body 17 of the switching valve 16 in flow direction 12 of the fuel from the control chamber 2.
  • the integrated into the flow channel 10 first throttle element 13 acts here as a drain throttle
  • a pressurization of the control chamber 2 via flow channel 10 can according to the embodiment in Fig. 1 either via the valve space 18 permanently acting on the high-pressure side inlet 28 with second throttle element 26 done so that adjusts a pressure build-up in the control chamber 2 in the inlet direction 11 of the fuel in the flow channel 10 via the then acting as inflow throttle element first throttle 13.

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

Claims (5)

  1. Injecteur de carburant pour des moteurs à combustion interne à injection directe comprenant un corps d'injecteur (1) avec une chambre de commande (2) qui actionne un dispositif aiguille d'injecteur/poussoir dans le corps d'injecteur par application de pression/décharge de pression,
    la chambre de commande (2) étant déchargée en pression par un canal de passage (10) équipé d'un premier organe d'étranglement (13) et reliée en permanence à une source de haute pression par une alimentation permanente (28) côté haute pression (12), avec un second organe d'étranglement (26), et le corps (1) de l'injecteur comporte une vanne de commutation (16) reliée à la chambre de commande (2) par le canal de passage (10),
    et pour rétablir la pression dans la chambre de commande (2) par la vanne de commutation (16), une autre alimentation (29) côté haute pression, munie d'un troisième organe d'étranglement (27) peut être branchée en parallèle avec l'alimentation permanente (28) côté haute pression, l'embouchure de l'autre alimentation (29) côté haute pression débouche dans la chambre (18) de la vanne de commutation (16) et elle est orientée vers un siège (20) d'un corps de vanne (17) dans la direction d'actionnement (23) de ce corps de vanne (17),
    caractérisé en ce que
    l'alimentation permanente (28) côté haute pression débouche dans la chambre (18) de la vanne de commutation (16).
  2. Injecteur de carburant selon la revendication 1,
    caractérisé en ce que
    le canal de passage (10), qui relie la chambre de commande (2) à la chambre (18) de la vanne de commutation (16), est traversée dans la direction de passage (11) du carburant vers la chambre de commande (2) ou dans la direction de sortie (12) du carburant quittant la chambre de commande (2) vers la chambre de vanne (18).
  3. Injecteur de carburant selon la revendication 1,
    caractérisé en ce que
    l'alimentation permanente (28) côté haute pression débouche dans la chambre (18) de la vanne de commutation (16) perpendiculairement à la direction d'actionnement (23) du corps (17) de la vanne de commutation (16).
  4. Injecteur de carburant selon la revendication 1,
    caractérisé en ce que
    le corps (17) de la vanne de commutation (16) a une forme de sphère et il est actionné par un élément de transmission (22) vers un premier siège de soupape (19) ou un second siège de soupape (20).
  5. Injecteur de carburant selon la revendication 4,
    caractérisé par
    un intervalle annulaire (21) réalisé entre l'élément de transmission (22) et le corps (1) de l'injecteur dans la chambre de vanne (18) et, en cas de décharge de pression de la chambre de commande (2), le volume de commande qui s'échappe, passe par une sortie (24).
EP02758062A 2001-06-29 2002-06-21 Injecteur de carburant a amenee de chambre de commande commutable Expired - Lifetime EP1404964B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10131618 2001-06-29
DE2001131618 DE10131618A1 (de) 2001-06-29 2001-06-29 Kraftstoffinjektor mit zuschaltbarem Steuerraumzulauf
PCT/DE2002/002292 WO2003004860A2 (fr) 2001-06-29 2002-06-21 Injecteur de carburant a amenee de chambre de commande commutable

Publications (2)

Publication Number Publication Date
EP1404964A2 EP1404964A2 (fr) 2004-04-07
EP1404964B1 true EP1404964B1 (fr) 2008-02-13

Family

ID=7690063

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02758062A Expired - Lifetime EP1404964B1 (fr) 2001-06-29 2002-06-21 Injecteur de carburant a amenee de chambre de commande commutable

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EP (1) EP1404964B1 (fr)
DE (2) DE10131618A1 (fr)
WO (1) WO2003004860A2 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007034319A1 (de) * 2007-07-24 2009-01-29 Robert Bosch Gmbh Injektor

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0976924A2 (fr) * 1998-07-31 2000-02-02 Siemens Aktiengesellschaft Servovalve pour un injecteur et injecteur
DE10055714A1 (de) * 1999-11-10 2001-06-13 Denso Corp Kraftstoffeinspritzventil
WO2001088366A1 (fr) * 2000-05-18 2001-11-22 Robert Bosch Gmbh Disposition d'injection pour un systeme d'injection de carburant a accumulateur dans un moteur a combustion interne

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT2110U3 (de) * 1997-06-16 1998-09-25 Avl List Gmbh Einspritzdüse
DE19744518A1 (de) 1997-10-09 1999-04-15 Bosch Gmbh Robert Kraftstoffeinspritzventil für Brennkraftmaschinen
DE19910589C2 (de) 1999-03-10 2002-12-05 Siemens Ag Einspritzventil für eine Brennkraftmaschine
JP3557996B2 (ja) * 1999-06-21 2004-08-25 トヨタ自動車株式会社 燃料噴射装置
JP3551898B2 (ja) * 2000-06-15 2004-08-11 トヨタ自動車株式会社 燃料噴射弁

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0976924A2 (fr) * 1998-07-31 2000-02-02 Siemens Aktiengesellschaft Servovalve pour un injecteur et injecteur
DE10055714A1 (de) * 1999-11-10 2001-06-13 Denso Corp Kraftstoffeinspritzventil
WO2001088366A1 (fr) * 2000-05-18 2001-11-22 Robert Bosch Gmbh Disposition d'injection pour un systeme d'injection de carburant a accumulateur dans un moteur a combustion interne

Also Published As

Publication number Publication date
DE10131618A1 (de) 2003-01-23
DE50211686D1 (de) 2008-03-27
WO2003004860A3 (fr) 2003-04-17
EP1404964A2 (fr) 2004-04-07
WO2003004860A2 (fr) 2003-01-16

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