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WO2008049666A1 - Injecteur doté d'une soupape de commande comportant une surface de butée de course conique - Google Patents

Injecteur doté d'une soupape de commande comportant une surface de butée de course conique Download PDF

Info

Publication number
WO2008049666A1
WO2008049666A1 PCT/EP2007/058921 EP2007058921W WO2008049666A1 WO 2008049666 A1 WO2008049666 A1 WO 2008049666A1 EP 2007058921 W EP2007058921 W EP 2007058921W WO 2008049666 A1 WO2008049666 A1 WO 2008049666A1
Authority
WO
WIPO (PCT)
Prior art keywords
valve
injector
injector according
pressure
hubanschlagsfläche
Prior art date
Application number
PCT/EP2007/058921
Other languages
German (de)
English (en)
Inventor
Hans-Christoph Magel
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 WO2008049666A1 publication Critical patent/WO2008049666A1/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
    • 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
    • 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
    • F02M63/007—Details not provided for in, or of interest apart from, the apparatus of the groups F02M63/0014 - F02M63/0059
    • F02M63/0078—Valve member details, e.g. special shape, hollow or fuel passages in the valve member
    • F02M63/008—Hollow valve members, e.g. members internally guided
    • 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
    • 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
    • F02M2547/00—Special features for fuel-injection valves actuated by fluid pressure
    • F02M2547/003—Valve inserts containing control chamber and valve piston

Definitions

  • the invention relates to an injector according to the preamble of claim 1.
  • EP 1 612 403 A1 describes a common-rail injector with a pressure-balanced control valve in the axial direction for blocking and opening a fuel discharge path from a control chamber.
  • the fuel pressure can be influenced within the control chamber, wherein the control chamber is supplied via a pressure channel (throttle bore) with fuel from an annular chamber connected to a high-pressure fuel storage.
  • a nozzle needle is moved between an open position of a closed position, wherein the nozzle needle in its open position releases the fuel flow into the combustion chamber of an internal combustion engine.
  • the axial travel of the valve sleeve is limited on the one hand by a stationary valve seat surface and on the other hand by a Hubanschlags phenomenon.
  • the Hubanschlags simulation is formed by a flat annular surface of a locking ring which is received in a circumferential groove of a valve sleeve passing through the pin.
  • the switching behavior of the control valve is affected by abutment bouncers of the valve sleeve on the flat Hubanschlagsthesis.
  • the anchor surfaces of a Valve sleeve actuated solenoid drive form as large as possible. In this case, however, there are large tolerance problems caused by the non-negligible influences of the fuel temperature, the air content and the return pressure. Furthermore, large-surface anchor surfaces cause a delay in the closing movement, which has a negative effect on the switching times and thus on the multiple injection capability of the injector.
  • the invention is therefore based on the object to propose an injector in which abutment bumpers of the valve sleeve on the lifting stop surface are damped in a simple manner with minimized negative effects on the switching time.
  • the invention is based on the idea, instead of a flat Hubanschlags simulation a conically shaped Huban- strike surface to provide, which cooperates with a corresponding counter-cone of the valve sleeve or a fixedly connected to the valve sleeve member.
  • a conical stroke stop makes a good stop achieved damping and effectively prevents abutment bounce.
  • only a small radial Hubanschlags phenomenon is advantageously required to realize a large hydraulic and mechanical stop damping.
  • the control valve is preferably a pressure-balanced valve in the axial direction.
  • a pressure-balanced control valve in the axial direction no or only minimal pressure forces in the axial direction act on the valve piston when the control valve is closed.
  • a realization of such an axially pressure compensated control valve can be realized in a simple manner by using a valve sleeve with a sleeve bore, wherein the sleeve bore has the same diameter as the valve seat.
  • the valve sleeve is preferably with its inner diameter sealingly against the valve seat surface.
  • a bolt For receiving the pressure forces acting in the axial direction, a bolt is advantageously provided, which is received in the axial direction within the valve sleeve.
  • This bolt transmits the pressure forces to an injector body.
  • the bolt can either be firmly connected to the injector body or formed integrally therewith. It is also conceivable that the bolt has no fixed connection to the injector body, but is supported only on this. In this case, the bolt is pressed against the injector body, for example, by the fuel pressure acting on it.
  • valve sleeve preferably high pressure-tight
  • the valve sleeve is guided with its inner circumferential surface on the outer surface of the bolt.
  • a damping chamber is provided which is bounded on the one hand by the valve sleeve and on the other hand, by the end face of the bolt.
  • a damping chamber is provided which is bounded on the one hand by the valve sleeve and on the other hand, by the end face of the bolt.
  • the damping property of the damping chamber is advantageously connected hydraulically via at least one throttle with a valve seat chamber, wherein the valve seat chamber is in turn connected hydraulically to the control chamber. Via the valve seat chamber, fuel can flow out of the control chamber with the control valve open in a region with low fuel pressure.
  • the actuator is designed as an electromagnetic drive, wherein at least one anchor plate is provided which is fixed to the valve piston, in particular the valve sleeve, connected or formed integrally therewith, to the valve piston when energized Electromagnetic actuator to adjust in the axial direction.
  • the actuator is designed as an electromagnetic drive, wherein at least one anchor plate is provided which is fixed to the valve piston, in particular the valve sleeve, connected or formed integrally therewith, to the valve piston when energized Electromagnetic actuator to adjust in the axial direction.
  • a piezoelectric actuator instead of an electromagnetic drive.
  • valve piston in particular on its upper, the valve seat surface facing away from an inner cone, which cooperates with an outer cone (Hubanschlags #2).
  • inner cone and outer cone are formed congruent with each other.
  • valve piston has an outer cone and cooperates with a shape-congruent inner cone-shaped Hubanschlags colour, for example, on the injector body or on a component connected thereto, in particular a bolt.
  • FIG. 1 shows a highly schematized injector with a control valve, the valve sleeve of which is provided with an inner cone which cooperates with a cone-shaped lifting stop surface.
  • an injector 1 is shown.
  • the injector 1 has an injector body 2, a nozzle body 3 and a throttle plate 4 accommodated between the nozzle body 3 and the injector body 2.
  • a nozzle retaining nut 5 is screwed to the injector body 2 and thus clamps the nozzle body 3 and the throttle plate 4 against the injector body 2.
  • the nozzle retaining nut 5 coaxially surrounds the throttle plate 4 and partially the injector body 2 and the nozzle body 3.
  • the nozzle body 3 passes in the axial direction through a through hole 6 of the nozzle retaining nut fifth
  • a guide bore 7 is formed, in which an elongated, in this embodiment, one-piece nozzle needle 8 is guided axially movable.
  • a multi-part nozzle needle can be used, wherein the individual parts are operatively connected to each other.
  • the nozzle needle 8 has a closing surface 10 with which it can be brought into tight contact with a needle seat 11 formed inside the nozzle body 3.
  • the nozzle needle 8 When the nozzle needle 8 abuts the needle seat 11, ie, is in a closed position, the fuel outlet from a nozzle hole arrangement 12 is blocked. If, on the other hand, it is raised by the needle seat 11, fuel can flow from a high-pressure space 13 formed between the nozzle needle 8 and the peripheral jacket of the guide bore 7 and an annular space 14 arranged below it in the direction of flow to the needle. delsitz 11 flow to the nozzle hole assembly 12 and there are injected substantially under the high pressure (rail pressure) standing in a combustion chamber.
  • the high-pressure chamber 13 is hydraulically connected via a supply line 15 to a high-pressure fuel accumulator 16, which is supplied with fuel, for example via a radial piston pump, not shown.
  • the nozzle needle 8 is biased by a biasing spring 17 in the direction of its closed position.
  • the biasing spring 17 is supported at one end on a held on the outer circumference of the nozzle needle 8 retaining ring 18 and the other end on a sleeve-shaped member 19, which in turn is supported on the throttle plate 4.
  • the component 19 and the throttle plate 4 may also be integrally formed.
  • a control chamber 20 is arranged, which is supplied via a pressure channel 21 with inlet throttle 22 with fuel under high pressure.
  • the pressure channel 21 connects the control chamber 20 with an annular space 23 within the nozzle body 3, wherein the annular space 23 is connected via a supply line 24 to the high-pressure fuel reservoir 16.
  • the nozzle needle 8 projects through a bore 25 in the component 19 with its upper end face 26 into the control chamber 20, so that the fuel pressure within the control chamber 20 acts on the nozzle needle 8 in the axial direction.
  • the control chamber 20 is provided with a flow restrictor 27 equipped with a drain hole 28, which is both the component 19 as well as the throttle plate 4 passes through, connected to a Kraftstoffablweg 29.
  • a pressure-balanced control valve 31 in the axial direction can block the fuel flow to the outflow line 29.
  • the flow cross-sections of the inlet throttle 22 and the outlet throttle 27 are coordinated so that the inflow through the pressure channel 21 is weaker than the outflow through the drain hole 28 and thus results in open control valve 31, a net outflow of fuel.
  • the resulting pressure drop in the control chamber Mer 15 causes the amount of closing force drops below the amount of the opening force and the nozzle needle 8 lifts from the needle seat 11.
  • the low-pressure space 33 is bounded radially on the outside by an armature stroke adjusting ring 34, via which the actuator 30 is supported on the throttle plate 4.
  • the control valve 31 comprises a valve sleeve 36 (valve piston) which can be displaced in the axial direction and which is firmly connected to an anchor plate 37 or formed integrally therewith.
  • the armature plate 37 cooperates with an electromagnet 38 of the electromagnetic actuator 30 and is received radially within the Ankerhubeinstellrings 34.
  • valve sleeve 31 is supported on the injector body 2 by a coil spring 39 and is urged by the coil spring 39 in the direction of its closed position, i. Federkraftbeaufschlagt in the direction of a valve seat surface 40.
  • the coil spring 39 is received in a through hole 41 within the actuator 30.
  • a bolt 42 is arranged, which is supported with its upper surface 43 in the plane of the drawing on the injector 2. With a lower portion 44 of the bolt 42 is received within the valve sleeve 36, wherein the valve sleeve 36 is guided high pressure-tight in the axial direction at the lower portion 44.
  • the lower portion 44 is in its upper end in the drawing plane via a conically shaped shoulder 45 in an upper portion 46 with a larger Diameter over.
  • the two cylindrical sections 44, 46 are connected to one another via the conical shoulder 45 that tapers in the direction of the needle point 9, preferably in one piece.
  • the outer surface of the conical shoulder 45 forms a Hubanschlags phenomenon 47 for abutment of an inner cone 48 which is provided on the plane of the drawing in the upper portion of the valve sleeve 36.
  • the inner cone 48 is made by chamfering the sleeve bore 49.
  • Inner cone 48 and paragraph 45 are formed congruent with each other and are in the open position of the control valve 31, so lifted at the valve seat surface 40 valve sleeve 36 to each other and thus dampen Auflaufpreller between the valve sleeve 36 and bolt 42nd
  • the lower end face 50 of the bolt 42 delimits a damping chamber 51 within the valve sleeve 36.
  • the damping chamber 51 is connected to a valve seat chamber 54 via a throttle bore 52 within the throttle chamber bottom 53.
  • the control valve 31 is, as mentioned, a pressure balanced in the axial direction valve.
  • the valve sleeve 36 abuts with its inner contour 35 on the annular valve seat surface 40.
  • the diameter The lower portion 44 of the bolt 42 corresponds to the inner diameter of the valve seat chamber 54 and the inner diameter of the damping chamber 51. To optimize the valve design of the lower portion 44 of the bolt 42 may also have a slightly smaller diameter than the valve seat surface 40th

Landscapes

  • 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)

Abstract

L'invention concerne un injecteur (1) pour injecter du carburant dans des espaces de combustion de moteurs à combustion interne, en particulier un injecteur à rampe commune, avec un actionneur (30) qui est disposé entre une surface de siège de soupape (40) et une surface de butée de course (47) située en face et qui actionne axialement un piston de soupape (36) d'une soupape de commande (31) à compensation de pression axiale. La soupape de commande (31) permet d'influencer la pression dans une chambre de commande (20), donc de modifier le réglage d'une aiguille d'injecteur (8) entre une position ouverte, qui libère le flux de carburant, et une position fermée. L'invention est conçue de telle manière que la surface de butée de course (47) a une forme conique.
PCT/EP2007/058921 2006-10-24 2007-08-28 Injecteur doté d'une soupape de commande comportant une surface de butée de course conique WO2008049666A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200610050032 DE102006050032A1 (de) 2006-10-24 2006-10-24 Injektor mit einem eine konische Hubanschlagfläche aufweisenden Steuerventil
DE102006050032.6 2006-10-24

Publications (1)

Publication Number Publication Date
WO2008049666A1 true WO2008049666A1 (fr) 2008-05-02

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ID=38752468

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2007/058921 WO2008049666A1 (fr) 2006-10-24 2007-08-28 Injecteur doté d'une soupape de commande comportant une surface de butée de course conique

Country Status (2)

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DE (1) DE102006050032A1 (fr)
WO (1) WO2008049666A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008128884A1 (fr) * 2007-04-19 2008-10-30 Robert Bosch Gmbh Injecteur de carburant avec électrovanne
EP1967727B1 (fr) * 2007-03-08 2011-08-24 Robert Bosch Gmbh Injecteur de carburant doté d'un équipement amélioré d'une soupape de commande pour la commande d'une aiguille d'injection
CN113250878A (zh) * 2021-06-18 2021-08-13 中国北方发动机研究所(天津) 一种共轨喷油器控制柱塞部件

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008001600A1 (de) * 2008-05-06 2009-11-12 Robert Bosch Gmbh Kraftstoff-Injektor mit einem eine Druckstufe aufweisenden Steuerventil
DE102008001822A1 (de) * 2008-05-16 2009-11-19 Robert Bosch Gmbh Magnetventil mit Ankerschlitzung
DE102008002146A1 (de) * 2008-06-02 2009-12-03 Robert Bosch Gmbh Kraftstoffinjektor mit Sitzlochdüse
DE102008040454A1 (de) 2008-07-16 2010-01-21 Robert Bosch Gmbh Kraftstoffeinspritzventileinrichtung
DE102016224208A1 (de) * 2016-12-06 2018-06-07 Robert Bosch Gmbh Elektromagnetisch betätigbares Steuerventil für einen Kraftstoffinjektor, Kraftstoffinjektor

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5564394A (en) * 1993-11-05 1996-10-15 Lucas Industries Public Limited Company Control valve
EP0781913A2 (fr) * 1995-12-23 1997-07-02 LUCAS INDUSTRIES public limited company Dispositif de soupape
DE19643430A1 (de) * 1996-10-22 1998-04-30 Man B & W Diesel Gmbh Steuerventil
WO2003004861A1 (fr) * 2001-07-04 2003-01-16 Robert Bosch Gmbh Injecteur de carburant a soupape de commande a equilibrage des forces

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5564394A (en) * 1993-11-05 1996-10-15 Lucas Industries Public Limited Company Control valve
EP0781913A2 (fr) * 1995-12-23 1997-07-02 LUCAS INDUSTRIES public limited company Dispositif de soupape
DE19643430A1 (de) * 1996-10-22 1998-04-30 Man B & W Diesel Gmbh Steuerventil
WO2003004861A1 (fr) * 2001-07-04 2003-01-16 Robert Bosch Gmbh Injecteur de carburant a soupape de commande a equilibrage des forces

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1967727B1 (fr) * 2007-03-08 2011-08-24 Robert Bosch Gmbh Injecteur de carburant doté d'un équipement amélioré d'une soupape de commande pour la commande d'une aiguille d'injection
WO2008128884A1 (fr) * 2007-04-19 2008-10-30 Robert Bosch Gmbh Injecteur de carburant avec électrovanne
CN113250878A (zh) * 2021-06-18 2021-08-13 中国北方发动机研究所(天津) 一种共轨喷油器控制柱塞部件

Also Published As

Publication number Publication date
DE102006050032A1 (de) 2008-04-30

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