EP0399991B1 - Verfahren und Vorrichtung zur Steuerung des Hubes eines hydraulisch betätigbaren Ventiles - Google Patents

Verfahren und Vorrichtung zur Steuerung des Hubes eines hydraulisch betätigbaren Ventiles Download PDF

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Publication number
EP0399991B1
EP0399991B1 EP90890140A EP90890140A EP0399991B1 EP 0399991 B1 EP0399991 B1 EP 0399991B1 EP 90890140 A EP90890140 A EP 90890140A EP 90890140 A EP90890140 A EP 90890140A EP 0399991 B1 EP0399991 B1 EP 0399991B1
Authority
EP
European Patent Office
Prior art keywords
valve
pressure
chamber
actuating
generating unit
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
EP90890140A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0399991A1 (de
Inventor
Diethard Dipl.-Ing. Plohberger
Volker Dipl.-Ing. Pichl
Herwig Dipl.-Ing. Dr. Ofner
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.)
AVL List GmbH
Original Assignee
AVL Gesellschaft fuer Verbrennungskraftmaschinen und Messtechnik mbH
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 AVL Gesellschaft fuer Verbrennungskraftmaschinen und Messtechnik mbH filed Critical AVL Gesellschaft fuer Verbrennungskraftmaschinen und Messtechnik mbH
Publication of EP0399991A1 publication Critical patent/EP0399991A1/de
Application granted granted Critical
Publication of EP0399991B1 publication Critical patent/EP0399991B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L9/00—Valve-gear or valve arrangements actuated non-mechanically
    • F01L9/10—Valve-gear or valve arrangements actuated non-mechanically by fluid means, e.g. hydraulic
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/0318—Processes

Definitions

  • the invention relates to a method and a device for controlling the stroke of a hydraulically actuated valve with a drive element which delimits a drive chamber in the valve housing and is pressure or spring-loaded in the closing direction and a pressure generating unit.
  • a device of this type has become known, for example, from EP-A-0328602, in which a gas exchange chamber is controlled by a valve of an injection valve that opens outward into the cylinder of an internal combustion engine. Compressed gases are removed from the cylinder during a work cycle, stored temporarily and blown into the cylinder of the internal combustion engine together with the fuel introduced into the valve-side gas exchange chamber in the following cycle.
  • a piston is used as the drive element of the valve needle, which has a shoulder that forms an annular space with the housing of the valve.
  • System pressure from a metering device is applied to this annular space via a check valve.
  • the piston of the injection valve moves downwards and the valve opens, the annulus is reduced, the fuel is displaced from it and injected into the valve-side gas exchange chamber via a check valve.
  • the valve of the injection valve opens only to the extent that it corresponds to the injection quantity conveyed by the metering device, as a result of which an amount of valve lift that increases with increasing engine load can be realized. With this simultaneous control, the needle stroke of the injection valve is therefore proportional to the amount of fuel injected.
  • the object of the invention is to propose a method and a device with which the stroke of a hydraulically actuated valve can be varied continuously for each individual working cycle independently of the valve's control times, production-related tolerances and temperature-related changes in length on the valve or on the valve housing having no influence should have on the valve stroke.
  • a flying adjustment piston guided in a cylinder which delimits a pressure chamber in the cylinder and separates the pressure chamber from the drive chamber in the valve housing, and that the pressure generating unit has a high-pressure line leading from a valve into the pressure chamber and a has a low-pressure line which is controlled by a further valve and leads into the drive chamber, the adjusting piston abutting a stop in the cylinder when the valve is at maximum stroke.
  • a drive chamber located between a drive element of the valve and a flying adjusting piston is acted upon with low pressure, so that the adjusting piston lifts off a stop until a valve controlling the low pressure is closed, as a result of which a certain stroke is defined that the adjusting piston is acted upon by valve under high pressure, whereby the adjusting piston up to its stop moved and the valve is opened due to the incompressible medium in the drive chamber, and that the valve controlling the low pressure is opened, whereby the drive chamber is emptied and the valve is closed by the closing force applied to the drive member.
  • the opening and closing times of the valve and independently of its stroke can be steplessly controlled via the valves in the high-pressure line and in the low-pressure line.
  • Both a piston guided in a cylinder and a diaphragm which is pressure or spring-loaded in the closing direction of the valve are conceivable as the drive element for the valve.
  • valve housing and the cylinder containing the adjusting piston are made in one piece, the valve axis and the axis of the adjusting piston coinciding.
  • other design variants are also conceivable, it only being necessary to ensure that the adjusting piston is arranged between the drive chamber and the pressure chamber and the volume of the drive chamber can be varied by the adjusting piston.
  • an electromagnetically operable two-way valve is arranged in the low-pressure line connected to the pressure generating unit via a reducing valve, a return line with a pressure-maintaining device being arranged between the reducing valve and two-way valve. Via the return line arranged between the reducing valve and the two-way valve, the excess fuel which is present after an opening and closing operation of the valve can be returned from the drive space into the fuel tank.
  • the pressure maintaining device is designed as a bladder accumulator. In all versions there must be a low pressure part and a high part pressure part of the pressure generating unit only a pressure difference overcoming the closing force of the valve is present.
  • an electromagnetically actuated three-way valve is arranged in the high-pressure line, one output of which is connected to the pressure chamber and the other output of which leads to a return line in which a throttle is arranged.
  • the pressure chamber is pressurized with high pressure, whereby the valve is opened due to the incompressible medium between the flying piston and the drive element of the valve, or the pressure chamber is relieved into a fuel tank.
  • a particularly advantageous application of the invention is the control of an injection valve of an internal combustion engine, the outward opening valve controlling a gas exchange chamber which is arranged in the valve housing and which is connected to the pressure generating unit via a metering device.
  • the metering of the fuel quantity injected into the gas exchange chamber can thus take place completely independently of the valve control.
  • Another advantageous application of the device according to the invention in an injection valve of an internal combustion engine provides that the inward opening valve controls a fuel chamber arranged in the valve housing, which is connected to the pressure generating unit via a pressure line.
  • the device for controlling the stroke of a valve shown in FIG. 1 shows a blow-in valve 1, the outward opening valve 2 of which can be actuated via a web 3 with a drive member or piston 4 which is spring-loaded in the closing direction.
  • a cylinder 6, in which a flying adjusting piston 7 is guided, is formed in one piece with the valve housing 5.
  • the adjusting piston 7, which is axially freely movable up to a stop 8 in the cylinder 6, separates a drive chamber 9, limited by the piston 4, in the valve housing 5 from the pressure chamber 10 in the cylinder 6.
  • the valve axis 2 'and the axis 7' of the adjusting piston 7 coincide in this embodiment variant.
  • the valve 2 is closed here by a spring 11, however, in the sense of the invention, the space 12 accommodating the spring 11 could also be pressurized.
  • the pressure generating unit 13 of the device has a high-pressure pump 15 connected to a fuel tank 14, the pressure of which can be adjusted via a throttle valve 16. Excess fuel is fed into the fuel tank 14 via a return 17.
  • the pressure generating unit 13 has a high-pressure line 18 which supplies the pressure chamber 10 in the cylinder 5 via an electromagnetically actuated three-way valve 19. In a switching position of the three-way valve 19, the pressure chamber 10 can be relieved into the fuel tank 14 via a return 29 with a throttle 30.
  • the pressure generating unit supplies a low-pressure line 21 via a one-way reducing valve 20, which is connected to the drive chamber 9 via an electromagnetically actuated two-way valve 22.
  • a return line 23 with a pressure maintaining device which is designed here as a pressure maintaining valve 24 and has a connecting line 25 to the fuel tank 14.
  • a line 26 branching off from the pressure line 18 leads to a metering device 27, with which the fuel is metered for the gas exchange chamber 28 arranged in the valve housing 5.
  • FIGS. 1 and 4 shows the control diagram of the device.
  • the considered points in time 0 to 5 are on the The abscissa of the diagram is shown.
  • Curve I represents the stroke of the injection valve
  • curve II represents the stroke of the adjusting piston 7 from the stop 8
  • curve III the switching of the three-way valve 19, the pressure chamber being acted upon with high pressure in the position H and being relieved in the R position.
  • Curve IV represents the switching positions of the two-way valve 22, where O means open and S means closed.
  • the two-way valve 22 and the three-way valve 19 are switched in such a way that the high pressure (20 to 100 bar) generated by the pump 15 is still applied to the pressure chamber 10 and is therefore in contact with the flying adjusting piston 7, which thereby rests on its stop 8 is held.
  • the injection valve 2 is already closed by the force of the spring 11.
  • the three-way valve 19 is switched so that the connection between the pressure chamber 10 and the pump 15 is interrupted and the return 29 for the fuel still in the pressure chamber 10 is released into the fuel tank 14 via the throttle 30.
  • the pressure in the pressure chamber 10 drops, so that the pressure (2 to 10 bar) present in the drive chamber 9 on the lower side of the flying adjusting piston 7 comes into play and this begins to lift up from the stop 8.
  • the amount of fuel required for this flows through the one-way reducing valve 20, the high pressure generated by the pump 15 being reduced to the low pressure mentioned. It should be noted that the pressure control valve 24 in the return line 23 should be set so that it is not yet opened when the low pressure is present.
  • the two-way valve 22 opens.
  • the fuel located in the drive chamber 9 can flow out via the pressure-maintaining valve 24.
  • the piston 4 While the high-pressure adjusting piston 7 maintains its position, the piston 4 is moved upwards by the spring 11 and the injection valve 1 is thereby closed.
  • the pressure-maintaining valve 24 is opened by the fuel pressure generated by the valve spring in the low-pressure line 21, and thus the fuel displaced by the piston 4 is discharged into the fuel tank 14.
  • valve 2 After valve 2 is closed, a cycle is completed and the initial state (time 0) is restored, so that the next cycle can begin.
  • FIG. 2 differs from that of FIG. 1 only in that the pressure maintaining device is designed as a bladder accumulator 31.
  • the bladder accumulator 31 supplies the amount of fuel required to raise the adjusting piston 7 at the time 1.
  • the pressure reducing valve 20 opens only when the amount of fuel in the bladder accumulator 31, and thus the pressure in the low-pressure part, drops below a certain minimum value as a result of leaks in the low-pressure part.
  • the spring 11 overcomes the counterpressure of the bladder accumulator 31 at time 4 and the displaced fuel volume is absorbed by the latter.
  • the device for controlling the valve lift is used in an injection valve 32. 1 and 2 corresponding components are provided with the same reference numerals.
  • An inward opening valve 2 is provided here, which controls a fuel chamber 33 arranged in the valve housing 5.
  • a connection to the pressure generating unit 13 is established via the line 26.
  • the pressure chamber 10 is arranged between the drive chamber 9 and the fuel chamber 33, as a result of which the adjusting piston 7, which can move up to the stop 8, must have a passage 34 for the web 3 of the valve 2.
  • FIG. 3a an embodiment variant according to FIG. 3a is also conceivable, in which the cylinder 6 with the adjusting piston 7 is arranged laterally on the valve housing 5, as a result of which the bushing 34 is omitted.
  • the axis of the adjusting piston 7 'and the valve axis 2' are arranged normal to each other here.
  • the stop 8 for the adjusting piston 7 can be formed directly by the wall of the valve housing 5.
  • the amount of fuel injected is advantageously determined via the opening duration and the stroke of the valve.
  • a smaller stroke results in smaller injection quantities better atomization, with longer injection times, better fuel processing can be achieved.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)
  • Fluid-Driven Valves (AREA)
  • Actuator (AREA)
  • Road Repair (AREA)
EP90890140A 1989-05-24 1990-05-08 Verfahren und Vorrichtung zur Steuerung des Hubes eines hydraulisch betätigbaren Ventiles Expired - Lifetime EP0399991B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT0126789A AT410124B (de) 1989-05-24 1989-05-24 Vorrichtung zur steuerung des hubes eines hydraulisch betätigbaren ventiles
AT1267/89 1989-05-24

Publications (2)

Publication Number Publication Date
EP0399991A1 EP0399991A1 (de) 1990-11-28
EP0399991B1 true EP0399991B1 (de) 1991-12-11

Family

ID=3510188

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90890140A Expired - Lifetime EP0399991B1 (de) 1989-05-24 1990-05-08 Verfahren und Vorrichtung zur Steuerung des Hubes eines hydraulisch betätigbaren Ventiles

Country Status (6)

Country Link
US (1) US5058614A (ja)
EP (1) EP0399991B1 (ja)
JP (1) JPH0670419B2 (ja)
AT (1) AT410124B (ja)
DE (1) DE59000019D1 (ja)
ES (1) ES2027072T3 (ja)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5148987A (en) * 1990-07-05 1992-09-22 Yamaha Hatsudoki Kabushiki Kaisha High pressure fuel injection device for engine
JP3400557B2 (ja) * 1994-08-10 2003-04-28 大阪瓦斯株式会社 弁駆動装置
AT408138B (de) * 1995-02-23 2001-09-25 Avl Verbrennungskraft Messtech Einrichtung zum einbringen von kraftstoff in den brennraum einer brennkraftmaschine
DE19604455B4 (de) * 1996-02-08 2006-10-05 Ivan Kunz Pneumatische Ventilsteuerung für Verbrennungskraftmaschinen
DE19946827C1 (de) * 1999-09-30 2001-06-21 Bosch Gmbh Robert Ventil zum Steuern von Flüssigkeiten
US6347619B1 (en) 2000-03-29 2002-02-19 Deere & Company Exhaust gas recirculation system for a turbocharged engine
US6520150B1 (en) * 2000-08-23 2003-02-18 Detroit Diesel Corporation Fuel injector assembly and internal combustion engine including same
DE10111293B4 (de) * 2001-03-09 2008-11-20 Robert Bosch Gmbh Kraftstoffeinspritzvorrichtung für Brennkraftmaschinen
US6584885B2 (en) * 2001-06-12 2003-07-01 Visteon Global Technologies, Inc. Variable lift actuator
US7010829B2 (en) 2003-06-05 2006-03-14 James Roger Harman Retractable hose central vacuum cleaning system apparatus and method
FR2878559B1 (fr) * 2004-11-30 2009-07-03 Renault Sas Dispositif d'actionnement des soupapes d'un moteur thermique sans arbre a cames et piston de soupape en deux parties
SE536106C2 (sv) * 2008-03-04 2013-05-07 Volvo Lastvagnar Ab Bränsleinsprutningssystem för en förbränningsmotor och fordon innefattande ett sådant bränsleinsprutningssystem
US8479353B2 (en) 2008-07-23 2013-07-09 Rod Drivstuen Hose valve apparatus and method for retractable hose vaccum systems
CN101571154B (zh) * 2009-06-04 2011-01-26 中国航空工业第一集团公司北京航空制造工程研究所 一种线性摩擦焊液压缸精确回零装置
KR101251522B1 (ko) * 2011-05-04 2013-04-05 현대자동차주식회사 유압 밸브 장치
CA3045082A1 (en) 2018-06-04 2019-12-04 Robert Lee Rawls Hose valve sub-assembly apparatus and method for retractable hose vacuum systems

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0328602A1 (de) * 1987-08-12 1989-08-23 AVL Gesellschaft für Verbrennungskraftmaschinen und Messtechnik mbH.Prof.Dr.Dr.h.c. Hans List Einrichtung zur einbringung des kraftstoffes in den brennraum einer brennkraftmaschine

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1321539A (fr) * 1962-02-07 1963-03-22 Soc Es Energie Sa Perfectionnements apportés aux moteurs à combustion interne, notamment aux machines à pistons libres, à injection de combustible gazeux
US3753426A (en) * 1971-04-21 1973-08-21 Physics Int Co Balanced pressure fuel valve
JPS4816079U (ja) * 1971-07-05 1973-02-23
JPS5425222Y2 (ja) * 1976-08-04 1979-08-23
DE2658927A1 (de) * 1976-12-24 1978-07-06 Maschf Augsburg Nuernberg Ag Bremseinrichtung fuer viertakt-hubkolbenbrennkraftmaschinen
FR2480854A1 (fr) * 1980-04-22 1981-10-23 Renault Commande de soupapes de moteurs a combustion interne par distributeur hydraulique a faible consommation de puissance
JPS57165661A (en) * 1981-04-04 1982-10-12 Diesel Kiki Co Ltd Fuel injection nozzle
JPS57193403U (ja) * 1981-06-01 1982-12-08
JPS5983878A (ja) * 1982-11-04 1984-05-15 Toshiba Mach Co Ltd 流量調整弁
DE3308928A1 (de) * 1983-03-12 1984-09-13 L. & C. Steinmüller GmbH, 5270 Gummersbach Hydraulik- oder pneumatikzylinder mit kontinuierlicher druckfluessigkeitsgesteuerter hublaengenverstellung
JPS6153457A (ja) * 1984-08-20 1986-03-17 Fuji Heavy Ind Ltd 燃料噴射弁
AT384079B (de) * 1985-06-07 1987-09-25 Avl Verbrennungskraft Messtech Zweitakt-brennkraftmaschine mit gleichstromspuelung

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0328602A1 (de) * 1987-08-12 1989-08-23 AVL Gesellschaft für Verbrennungskraftmaschinen und Messtechnik mbH.Prof.Dr.Dr.h.c. Hans List Einrichtung zur einbringung des kraftstoffes in den brennraum einer brennkraftmaschine

Also Published As

Publication number Publication date
US5058614A (en) 1991-10-22
ES2027072T3 (es) 1992-05-16
JPH0320104A (ja) 1991-01-29
ATA126789A (de) 2002-06-15
DE59000019D1 (de) 1992-01-23
JPH0670419B2 (ja) 1994-09-07
EP0399991A1 (de) 1990-11-28
AT410124B (de) 2003-02-25

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