WO2002027178A1 - Soupape de servocommande pour injecteurs - Google Patents

Soupape de servocommande pour injecteurs Download PDF

Info

Publication number
WO2002027178A1
WO2002027178A1 PCT/EP2001/010817 EP0110817W WO0227178A1 WO 2002027178 A1 WO2002027178 A1 WO 2002027178A1 EP 0110817 W EP0110817 W EP 0110817W WO 0227178 A1 WO0227178 A1 WO 0227178A1
Authority
WO
WIPO (PCT)
Prior art keywords
servo control
valve body
valve according
control valve
counter
Prior art date
Application number
PCT/EP2001/010817
Other languages
German (de)
English (en)
Inventor
Wolfgang Scheibe
Original Assignee
L'orange 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 L'orange Gmbh filed Critical L'orange Gmbh
Priority to DE50109450T priority Critical patent/DE50109450D1/de
Priority to EP01967354A priority patent/EP1319125B1/fr
Priority to JP2002530523A priority patent/JP3768191B2/ja
Priority to KR1020037004015A priority patent/KR100621270B1/ko
Publication of WO2002027178A1 publication Critical patent/WO2002027178A1/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
    • 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
    • F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
    • 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
    • F02M47/00—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure
    • F02M47/04—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure using fluid, other than fuel, for injection-valve actuation
    • F02M47/043—Fluid pressure acting on injection-valve in the period of non-injection to keep it closed
    • 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
    • F02M63/0028—Valves characterised by the valve actuating means hydraulic
    • F02M63/0029—Valves characterised by the valve actuating means hydraulic using a pilot valve controlling a hydraulic chamber
    • 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
    • F02M63/0071—Details not provided for in, or of interest apart from, the apparatus of the groups F02M63/0014 - F02M63/0059 characterised by guiding or centering means in valves including the absence of any guiding means, e.g. "flying arrangements"
    • 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
    • F02M2547/006—Springs assisting hydraulic closing force

Definitions

  • the invention relates to a servo control valve for injection injectors of internal combustion engines, in particular internal combustion engines working with storage pressure injection and operated with diesel or heavy oil.
  • Such injection injectors are known from practice and usually comprise an injection nozzle, a control valve assigned to it, a servo control valve responding to the control valve and an axial actuator, usually in the form of a magnetic actuator.
  • a control valve assigned to it
  • a servo control valve responding to the control valve
  • an axial actuator usually in the form of a magnetic actuator.
  • Actuation of the control valve can hardly be applied, so that a servo control valve is interposed, which has a quasi amplifier function and works with a graduated throttle system, whereby the spring-loaded armature controls the discharge throttle cross-section, so that the actuating spring, which loads the magnet armature on its closed position, controls the Forces must be applied which, depending on the control oil pressure and the cross-section of the discharge throttle controlled by the magnet armature, are required to block the discharge cross-section when covered by the magnet armature.
  • Magnetic armature must be weaker with regard to the locking position of the spring than the lifting force to be applied by the magnet when energized.
  • the invention has for its object to provide a servo control valve for injection injectors which, despite predetermined restrictions with regard to the actuating forces applied via the axial actuator, in particular a magnetic actuator, enables high actuating speeds with the required relatively high actuating forces to be applied.
  • a servo control valve for injection injectors by an embodiment according to claim 1, according to which a 3/2-way valve is used as the servo control valve, which enables sufficiently large control cross sections and has a comparatively simple structure despite integration in the injection injector.
  • a valve guide insert which is from the injector housing is recorded and which has to be fixed tightly pressed into the injector housing, but at the same time enables the best prerequisites for high precision thanks to a cross-divided design, also with regard to fitting into the injector. At the same time, high positioning speeds can be achieved.
  • the configuration according to the invention through the transverse division of the valve guide insert and the guidance of its part serving as a counter-valve body on the control piston, also offers particularly favorable conditions to compensate for any tolerances in the alignment of the valve parts and their assignment to the control piston, as well as the channel paths within the servo control valve as well easy to design and with large cross-sections for the connections.
  • valves of the type described with a cross-divided valve guide insert can also be expedient in other ways, since by dividing the valve insert into a part leading to the control piston and into a part guided by the control piston, not only advantages in terms of the structure as a pressure-balanced valve, at with a radially protruding control collar designed control piston, can be reached in terms of construction and assembly, but if necessary, access to the inner parts of the valve is also facilitated for service purposes without having to relinquish or loosen its centering relative to the respective receiving part, since access is via the part of the valve insertion insert guided on the piston becomes possible.
  • Figure 1 in a highly schematic representation of a section of a
  • Injection injector this section being essentially limited to the representation of the servo control valve in section, which is addressed via an axial actuator in the form of a magnetic actuator and via which the pressurization for an actuating piston, preferably one
  • Control piston of a control valve is controlled, and Figure 2. an enlarged section corresponding to A in Figure 1.
  • the figures show a section of an injection injector 1, 2 being a partial area of a control valve 2, which is preceded by a servo control valve 3.
  • an axial actuator in the form of a schematically indicated magnetic actuator 4 with a magnet armature 5 which is loaded in the direction of the servo control valve 3 via a spring 6. If the magnet actuator 4 is energized, the magnet armature 5 is raised against the force of the spring 6.
  • the magnet armature 5 acts on a control piston 7, which is arranged in a valve guide insert 8, which is cross-divided in relation to the common escape axis 9 of the magnetic actuator 4, servo control valve 3 and control valve 2 and one part of which is a valve body 10 and the other part of which is a counter valve body 11 connect axially to each other and are supported against each other, the valve body 10 being axially pressed in a sealing housing for the servo control valve 3.
  • the housing region enclosing the valve guide insert 8 is designated by 12 and can be formed by a housing part of the injection injector 1.
  • valve body 10 and counter valve body 1 1 lies between the axially spaced sealing edges 14 and 15, of which the sealing edge 14 is assigned to the valve body 10 and the sealing edge 15 to the counter valve body 1 1, which enclose the valve chamber 16 between them.
  • the valve chamber 16 is assigned an annular collar 17 on the part of the control piston 7, which has control edges 18 and 19, which cooperate with the sealing edges 14 and 15 of the valve chamber 16 with a relatively small radial overlap of the annular collar 17 to the valve chamber 16, if in accordance with the axial adjustment path of the control piston 7 one or the other comes in their investment position.
  • the control piston 7 On both sides of the Ririgbundes 17, the control piston 7 has annular areas with reduced diameter as annular spaces 20 and 21, the annular chamber 21 being delimited in the area of the end of the control piston 7 in the counter-valve body 11 by a guide collar 22 on which, as a centering collar, the counter-valve body 11 is guided, the counter-valve body 11 having a cup-shaped design has a bottom zone 23 which engages under the control piston 7 and which supports a spring 24 forms, which is supported lying in an axial bore 25 of the control piston 7 against a shoulder 26 of the same.
  • the bottom zone 23 forms a support for a spring 27, which acts on a control piston 29, bridging a pressure chamber 28, which is axially displaceably assigned to the control valve 2 and is supported against its control piston.
  • the supply connection 30 is a high-pressure connection via which control oil is supplied. This occurs in the switching position of the servo control valve 3 shown, in which the armature 5 loads the control piston 7 via the spring 6 in the direction of the counter-valve body 11 and in which the sealing edge 15 cooperates sealingly with the control edge 19, passes over to the valve chamber 16, and passes from there via radial overflow cross sections 31 into the pressure chamber 28.
  • the radial overflow cross sections 31 are formed as annular gaps or the like, which are formed, for example, by spacing elements between the countervalve body 11 and the valve body 10 which are due to axial approaches on the valve body 10 and / or are formed on the counter valve body 1 1. If necessary, an annular insert can also be provided, which releases corresponding cross-sections 31.
  • the counter valve body 11 can lie radially spaced from the wall of the receiving bore 37 for the valve body 10 via the guide collar 22 or corresponding guide surfaces, so that axial flow paths 32 to the pressure chamber 28 result from the overflow cross sections 31.
  • the actuating piston 29 is pressurized via the high pressure supply connection 30 and its connection to the pressure chamber 28 in addition to the spring 27 and thus holds the control piston of the control valve, not shown, in a position corresponding to the closed position of the injection nozzle.
  • the control piston 7 is in the upper stop position, not shown, in which the sealing edge 14 interacts with the control edge 18. reversed, with the result that the pressure chamber 28 is connected to the return 36 via the overflow cross sections 31, the annular space 21 and an overflow cross section opening onto the axial bore 25.
  • the overflow cross section mentioned can, as shown in FIG. 2, be formed by radial bores 33 or also in that the annular collar has axial passage openings 34 which allow the piston 7 to pass into the axial bore 25 on the end face.
  • the axial bore 25, as indicated by the arrow 35, is connected to the return channel 36.
  • control valve construction according to the invention is designed in such a way that it can also be mastered well in terms of production technology, since the guide seat and stop surfaces for the Valve body 10 as well as for counter-valve body 11 could each be ground in one setting, so that close tolerances are possible. The same applies to the control piston with regard to its guide or centering surfaces and seat surfaces. In addition to inexpensive production, high precision must also be guaranteed.

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

Une soupape de servocommande (3) destinée à des injecteurs de moteurs thermiques, est selon l'invention réalisée sous la forme d'une soupape de distribution 3/2, un élément rapporté de guidage de soupape (8) à pas transversal étant utilisé, une partie dudit élément rapporté servant de guidage au piston (7) et l'autre partie (11) étant guidée sur le piston alors que lesdites parties prennent appui axialement l'une sur l'autre.
PCT/EP2001/010817 2000-09-20 2001-09-19 Soupape de servocommande pour injecteurs WO2002027178A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
DE50109450T DE50109450D1 (de) 2000-09-20 2001-09-19 Servosteuerventil für einspritzinjektoren
EP01967354A EP1319125B1 (fr) 2000-09-20 2001-09-19 Soupape de servocommande pour injecteurs
JP2002530523A JP3768191B2 (ja) 2000-09-20 2001-09-19 噴射インジェクタのためのサーボ制御弁
KR1020037004015A KR100621270B1 (ko) 2000-09-20 2001-09-19 인젝터용 서보 제어 밸브

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10046823A DE10046823B4 (de) 2000-09-20 2000-09-20 Servosteuerventil für Einspritzinjektoren
DE10046823.3 2000-09-20

Publications (1)

Publication Number Publication Date
WO2002027178A1 true WO2002027178A1 (fr) 2002-04-04

Family

ID=7657122

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2001/010817 WO2002027178A1 (fr) 2000-09-20 2001-09-19 Soupape de servocommande pour injecteurs

Country Status (6)

Country Link
EP (1) EP1319125B1 (fr)
JP (1) JP3768191B2 (fr)
KR (1) KR100621270B1 (fr)
AT (1) ATE322616T1 (fr)
DE (2) DE10046823B4 (fr)
WO (1) WO2002027178A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2604353A (en) * 2021-03-02 2022-09-07 Delphi Tech Ip Ltd Improved Injector

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6067955A (en) * 1997-09-24 2000-05-30 Robert Bosch Gmbh Fuel injection device for internal combustion engines
US6085719A (en) * 1998-04-11 2000-07-11 Robert Bosch Gmbh Fuel injection system for internal combustion engines
DE19941709A1 (de) * 1999-09-02 2001-03-15 Bosch Gmbh Robert Gebautes Steuerventil für einen Injektor eines Kraftstoffeinspritzsystems für Brennkraftmaschinen

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB9823134D0 (en) * 1998-10-23 1998-12-16 Lucas Ind Plc Valve

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6067955A (en) * 1997-09-24 2000-05-30 Robert Bosch Gmbh Fuel injection device for internal combustion engines
US6085719A (en) * 1998-04-11 2000-07-11 Robert Bosch Gmbh Fuel injection system for internal combustion engines
DE19941709A1 (de) * 1999-09-02 2001-03-15 Bosch Gmbh Robert Gebautes Steuerventil für einen Injektor eines Kraftstoffeinspritzsystems für Brennkraftmaschinen

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2604353A (en) * 2021-03-02 2022-09-07 Delphi Tech Ip Ltd Improved Injector
GB2604353B (en) * 2021-03-02 2024-05-29 Phinia Delphi Luxembourg Sarl Improved Injector

Also Published As

Publication number Publication date
KR100621270B1 (ko) 2006-09-13
EP1319125B1 (fr) 2006-04-05
EP1319125A1 (fr) 2003-06-18
JP2004510098A (ja) 2004-04-02
DE10046823B4 (de) 2004-07-15
DE10046823A1 (de) 2002-04-04
DE50109450D1 (de) 2006-05-18
KR20030036808A (ko) 2003-05-09
ATE322616T1 (de) 2006-04-15
JP3768191B2 (ja) 2006-04-19

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