WO2011026689A1 - Dispositif d'injection de carburant - Google Patents

Dispositif d'injection de carburant Download PDF

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Publication number
WO2011026689A1
WO2011026689A1 PCT/EP2010/060609 EP2010060609W WO2011026689A1 WO 2011026689 A1 WO2011026689 A1 WO 2011026689A1 EP 2010060609 W EP2010060609 W EP 2010060609W WO 2011026689 A1 WO2011026689 A1 WO 2011026689A1
Authority
WO
WIPO (PCT)
Prior art keywords
valve
fuel injection
injection device
shoulder
fuel
Prior art date
Application number
PCT/EP2010/060609
Other languages
German (de)
English (en)
Inventor
Nadja Eisenmenger
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 WO2011026689A1 publication Critical patent/WO2011026689A1/fr

Links

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
    • 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
    • F02M61/168—Assembling; Disassembling; Manufacturing; Adjusting
    • 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
    • F02M63/0014—Valves characterised by the valve actuating means
    • F02M63/0015—Valves characterised by the valve actuating means electrical, e.g. using solenoid
    • 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
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/80—Fuel injection apparatus manufacture, repair or assembly
    • F02M2200/8076—Fuel injection apparatus manufacture, repair or assembly involving threaded members

Definitions

  • the invention relates to a fuel injection device for injecting fuel into a combustion chamber of an internal combustion engine, comprising a control valve, which comprises a valve piece having a central through hole with a throttle point and is clamped by means of a valve clamping screw against a housing body.
  • the object of the invention is to further improve a fuel injection device according to the term of claim 1 in terms of strength under higher pressures.
  • a fuel injection device for injecting fuel into a combustion chamber of an internal combustion engine, with a control valve comprising a valve piece having a central through hole with a throttle point and is clamped by means of a valve clamping screw against a housing body, achieved in that the valve piece has a sloping shoulder against which abuts a complementary clamping shoulder of the valve clamping screw.
  • a control valve comprising a valve piece having a central through hole with a throttle point and is clamped by means of a valve clamping screw against a housing body, achieved in that the valve piece has a sloping shoulder against which abuts a complementary clamping shoulder of the valve clamping screw.
  • European Patent Application EP 0 890 734 A2 discloses a fuel injection valve with an annular shoulder which is curved on its side facing an annular shoulder such that a ring-shaped bearing point results at a predetermined distance from a valve member axis, on which the conical annular shoulder in the assembled state is applied.
  • European Patent Application EP 0 569 727 A1 discloses a fuel injection nozzle with a pipe socket, which has a convex cone at an outlet end and a convex shoulder in the middle region, against which a hollow cap screw presses.
  • a preferred embodiment of the fuel injection device is characterized in that the oblique shoulder is designed as a chamfer radially outward at a combustion chamber remote end of the valve piece. At an end near the combustion chamber, the valve piece has a planar end face, with which the valve piece bears against the housing body of the fuel injection device.
  • Another preferred embodiment of the fuel injector is characterized in that the oblique shoulder includes a helix angle of 15 to 70 degrees to a transverse plane that is perpendicular to a longitudinal axis of the fuel injector. The helix angle is more preferably 15 to 45 degrees. In the context of the present invention, a helix angle of about 30 degrees has proved to be particularly advantageous.
  • valve clamping screw has an external thread with which the valve clamping screw is screwed into a housing of the fuel injection device.
  • a further preferred embodiment of the fuel injection device is characterized in that the oblique shoulder is arranged in the vicinity of the throttle point.
  • the oblique shoulder is arranged on the valve piece, preferably radially outside the throttle point.
  • FIG. 2 shows a simplified representation of an enlarged section of a valve piece with a valve clamping screw from FIG. 1.
  • FIG. 1 shows a section of a fuel injection device 1 designed as a common-rail injector, which is also referred to as an injector, for injecting fuel into a combustion chamber of an internal combustion engine of a motor vehicle.
  • a high-pressure pump 2 delivers fuel from a reservoir 3 into a high pressure fuel accumulator 4. In this fuel, especially diesel or gasoline, under high pressure, stored in this embodiment about 2000 bar.
  • the injector 1 is next to other, not shown, injectors via a supply line 5 an closed.
  • the supply line 5 opens into a pressure chamber 6 of the injector 1 and flows from there in an injection process directly into the combustion chamber of the internal combustion engine.
  • the injector 1 is connected via an injector return valve 7 to a return line 8, which leads to the reservoir 3. Through the return line 8, a later to be explained control amount of fuel flow from the injector 1 to the reservoir 3 and are fed from there from the high pressure circuit again.
  • an injection valve element 10 which is integral in this exemplary embodiment and which may also be designed in several parts, can be adjusted in the axial direction.
  • the injection valve element 10 is guided within a nozzle body, not shown, clamped to the housing part 9 on its outer periphery.
  • This nozzle body, not shown, is preferably clamped by means of a union nut, also not shown, with the housing part 9.
  • the injection valve element 10 has at its (lower) tip (not shown) a closing surface with which the injection valve element 10 can be brought into tight engagement with an injection valve element seat (not shown) formed within the nozzle body.
  • a control chamber 14 is limited, via a radially in the sleeve-shaped portion 12 of the valve body 13 extending inlet throttle 15 is supplied with high-pressure fuel from the pressure chamber 6 h.
  • the sleeve-shaped section 12 with the control chamber 14 enclosed therein is radially outward of The high-pressure fuel enclosed, so that an annular guide gap 16 is comparatively fuel-tight radially between the sleeve-shaped portion 12 and the injection valve member 10.
  • the control chamber 14 is connected via a arranged in the valve body 13 drain passage 17 with outlet throttle 18 hydraulically connected to a valve chamber 19 which is bounded radially outwardly by an axially adjustable valve sleeve 20 of a pressure-balanced in the axial direction of the control valve 21.
  • the axial pressure balance of the control valve 21 is achieved in that the inner guide diameter D- ⁇ the valve sleeve
  • valve 20 corresponds at least approximately to the diameter D 2 of an annular sealing line, by means of which the valve sleeve 20 in the closed state rests against a control valve seat 22 which is formed on the valve body 13. From the valve chamber 19 fuel can then flow into a low-pressure region 23 of the injector 1 and from there to the injector return port 7, when the valve sleeve 20, which is formed integrally with an anchor plate 24 in the embodiment shown, from its formed on the valve body 20 control valve seat 22nd is lifted, that is, the control valve 21 is open.
  • an electromagnet arrangement 25 is provided, which has an electromagnet 26, which is held in a holding body 27.
  • the electromagnet 26 interacts with the armature plate 24, which is arranged in an armature space 28, wherein the armature space 28 via a ring member 29 of an axially adjacent to the armature space 28 arranged annular space 30, the lower the valve sleeve 20 in a plane in the drawing Section radially outwardly encloses, is separated. Due to the one-piece design of armature plate 24 and valve sleeve 20 or alternatively by a firm connection between the armature plate 24 and the valve sleeve 20, lifts the valve sleeve 20 when energized electromagnet arrangement25 of its arranged on the valve body 13, formed in this embodiment as a flat seat, Control valve seat 22 from.
  • the flow cross sections of the inlet throttle 15 and the outlet throttle 18 are matched to one another such that when the control valve 24 is open, a net outflow of fuel from the control chamber 14 via the valve chamber 19 in the low pressure region 23, more precisely in the annular space 30, the injector 1 and from there to the injector return port 7 and through the return line 8 in the Vor- storage tank 3 flows.
  • the pressure in the control chamber 14 decreases rapidly, whereby the injection valve element 10 lifts off from its injection valve element seat, so that fuel can subsequently flow out of the pressure chamber 6 through the nozzle yoke arrangement into the combustion chamber.
  • the energization of the solenoid assembly 25 is interrupted, whereby the valve sleeve 20 by means of a support plate 24 supported on the control closing spring 31, which is mostly within a centrally disposed within the solenoid assembly 25, spring chamber 32 is included in the drawing level down on its control valve seat 22 is adjusted.
  • the fuel flowing in through the inlet throttle 15 into the control chamber 14 ensures a rapid increase in pressure in the control chamber 14 and thus for a force acting on the injection valve element
  • Closing force The resulting closing movement of the injection valve element 10 is assisted by a closing spring (not shown), which is supported at one circumferential collar of the injection valve element 10 and at the other end at a lower, not shown end side of the valve body 13.
  • the fuel injection device 1 shown in Figure 1 has a longitudinal axis 101 along which the injection valve element 10 is movable back and forth.
  • the valve body 13, also referred to as valve piece, is braced against the housing body 9 with the aid of a valve clamping screw 40.
  • the drainage channel 17 with the outlet throttle 18 represents a central through hole which runs along the longitudinal axis 101.
  • a valve clamping screw 102 is shown in fragmentary and greatly simplified in half section with a valve member 104.
  • the valve piece 104 has a central through-hole 105, which corresponds to the outlet channel 17 with the outlet throttle 18 in FIG.
  • the central through-hole 105 has a throttle point 106.
  • a helical shoulder 108 is formed on the valve piece 104 in the vicinity of the throttle point 106, against which a clamping shoulder 109 of the valve clamping screw 102 bears under tension.

Landscapes

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

Abstract

L'invention concerne un dispositif d'injection de carburant pour l'injection de carburant dans une chambre de combustion d'un moteur à combustion interne, avec une soupape de commande, qui comporte une pièce de soupape (104) qui présente un trou de passage central (105) avec un point d'étranglement et est tendue à l'aide d'une vis de serrage de soupape (102) contre un corps de boîtier. Afin d'améliorer encore un dispositif d'injection de carburant par rapport à la résistance à des pressions supérieures, la pièce de soupape (104) présente un épaulement incliné (108), sur lequel s'applique un épaulement de serrage (109) complémentaire de la vis de serrage de soupape (102).
PCT/EP2010/060609 2009-09-02 2010-07-22 Dispositif d'injection de carburant WO2011026689A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200910029116 DE102009029116A1 (de) 2009-09-02 2009-09-02 Kraftstoffeinspritzvorrichtung
DE102009029116.4 2009-09-02

Publications (1)

Publication Number Publication Date
WO2011026689A1 true WO2011026689A1 (fr) 2011-03-10

Family

ID=42711932

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2010/060609 WO2011026689A1 (fr) 2009-09-02 2010-07-22 Dispositif d'injection de carburant

Country Status (2)

Country Link
DE (1) DE102009029116A1 (fr)
WO (1) WO2011026689A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023001154A1 (fr) 2021-07-20 2023-01-26 广州爱思迈生物医药科技有限公司 Anticorps b7-h3 et son utilisation

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0569727A1 (fr) 1992-05-09 1993-11-18 Robert Bosch Gmbh Arrangement d'alimentation en combustible pour un injecteur
EP0890734A2 (fr) 1997-07-11 1999-01-13 Robert Bosch Gmbh Soupape d'injection de combustible
WO2007128612A1 (fr) * 2006-05-10 2007-11-15 Robert Bosch Gmbh Injecteur de carburant comportant une soupape de commande à compensation de pression
DE102007047152A1 (de) 2007-10-02 2009-04-09 Robert Bosch Gmbh Injektor mit einem Ringraum getrennten Ankerraum
DE102008005523A1 (de) * 2008-01-23 2009-07-30 Robert Bosch Gmbh Kraftstoffinjektor
DE202008009036U1 (de) * 2008-07-04 2009-11-12 Robert Bosch Gmbh Ventilspannmutter

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0569727A1 (fr) 1992-05-09 1993-11-18 Robert Bosch Gmbh Arrangement d'alimentation en combustible pour un injecteur
EP0890734A2 (fr) 1997-07-11 1999-01-13 Robert Bosch Gmbh Soupape d'injection de combustible
WO2007128612A1 (fr) * 2006-05-10 2007-11-15 Robert Bosch Gmbh Injecteur de carburant comportant une soupape de commande à compensation de pression
DE102007047152A1 (de) 2007-10-02 2009-04-09 Robert Bosch Gmbh Injektor mit einem Ringraum getrennten Ankerraum
DE102008005523A1 (de) * 2008-01-23 2009-07-30 Robert Bosch Gmbh Kraftstoffinjektor
DE202008009036U1 (de) * 2008-07-04 2009-11-12 Robert Bosch Gmbh Ventilspannmutter

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023001154A1 (fr) 2021-07-20 2023-01-26 广州爱思迈生物医药科技有限公司 Anticorps b7-h3 et son utilisation

Also Published As

Publication number Publication date
DE102009029116A1 (de) 2011-03-03

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