EP1577540B1 - Steuerventil für ein Einspritzventil - Google Patents

Steuerventil für ein Einspritzventil Download PDF

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Publication number
EP1577540B1
EP1577540B1 EP04006631A EP04006631A EP1577540B1 EP 1577540 B1 EP1577540 B1 EP 1577540B1 EP 04006631 A EP04006631 A EP 04006631A EP 04006631 A EP04006631 A EP 04006631A EP 1577540 B1 EP1577540 B1 EP 1577540B1
Authority
EP
European Patent Office
Prior art keywords
valve needle
valve
control valve
piston
insert
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
EP04006631A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1577540A1 (de
Inventor
H. O. Dr. Geisser
Timo Hochholzer
Marcel Schenk
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.)
Dualon International Holding SA
Original Assignee
Dualon International Holding SA
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 Dualon International Holding SA filed Critical Dualon International Holding SA
Priority to EP04006631A priority Critical patent/EP1577540B1/de
Priority to DK04006631.8T priority patent/DK1577540T3/da
Priority to AT04006631T priority patent/ATE469298T1/de
Priority to DE502004011204T priority patent/DE502004011204D1/de
Publication of EP1577540A1 publication Critical patent/EP1577540A1/de
Application granted granted Critical
Publication of EP1577540B1 publication Critical patent/EP1577540B1/de
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
    • 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
    • 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

Definitions

  • the present invention relates to a control valve, in particular for injection valves for internal combustion engines, comprising a valve housing, an axially movable valve needle, which is arranged in a cylindrical guide, and a piston arranged in the movable valve needle.
  • a control valve for an injection valve in which a piston connected to the housing is provided inside the valve needle.
  • the valve needle is sleeve-shaped and the piston engages in the axial direction in the valve needle.
  • a disadvantage of this control valve is that the forces acting on the valve needle pressure forces are not compensated and thus the forces required for switching at high pressures are large. This leads to an extension of the switching time and thus to a limitation of the effectiveness of the injection.
  • a similar control valve is off DE 10103089 also known.
  • an insert is received in the valve housing, on which the piston is held within the valve needle.
  • the axial pressure forces acting through a fluid cancel each other. Because especially at high pressures, the axial compressive forces are responsible for the fact that high forces must be used to close and keep closed the valve. On the other hand, if the valve needle is not pressed substantially in one direction by axial pressure forces of a fluid, the switching forces can be minimized and, accordingly, the switching time can be made extremely short.
  • the insert surrounds the valve needle at least partially, so that the piston can also be accommodated within the insert.
  • a radial support may be provided when the valve needle has an opening and the piston bears against a support body which is fixed by the opening of the valve needle to the insert.
  • the opening may be formed as a slot to allow a certain relative movement of the valve needle to the support body for the circuit of the control valve.
  • the piston can be inserted into the sleeve-shaped valve needle.
  • the outer cylindrical guide which is formed in the insert.
  • a valve seat for the valve needle is preferably formed.
  • the flow cross-section expands externally adjacent to the valve seat. Because when opening the valve needle in a region adjacent to the sealing edge of the valve seat relatively high pressure forces would act in the axial direction, if the fluid can not flow off well on the valve needle.
  • a step may be formed at the front end portion of the valve needle radially outwardly adjacent to the sealing edge, so that widens the flow cross-section.
  • a valve for the intermittent liquid injection includes, inter alia, a valve housing 1 and a control valve.
  • the injection valve is known per se and can be designed as shown in the PCT application PCT / EP04 / 00434 is described.
  • the control valve comprises a cylindrical insert 2, in which a valve needle 3 is guided.
  • the valve needle 3 is sleeve-shaped and a cylindrical piston 4 is provided within the valve needle 3, which bears against a pin 5.
  • the piston 4 and the valve needle 3 are movable relative to each other for a switching operation.
  • the valve needle 3 is connected via an intermediate piece 9 with an armature 6 which is movable via a solenoid 7.
  • the solenoid attracts the armature 6 and the valve needle 3 connected thereto in response to an electrical pulse for a certain time to open the control valve.
  • the valve needle 3 is biased by a spring 8 which bears against the intermediate piece 9 in the closed position.
  • the valve needle 3, the piston 4, the intermediate piece 9 and the spring 8 are coaxially positioned about an axis 50.
  • the piston 4 is held by a pin 5, which is performed by a slot 10 formed as an opening in the valve needle 3.
  • a cylindrical guide 11 is formed in the insert 2, and further provided is a cylindrical guide between the pin 4 formed as a piston and the inner wall of the valve needle 3.
  • the valve needle 3 is movable relative to the stationarily arranged insert 2, the piston 4 and the pin 5.
  • a chamber 13 is provided, which is in communication with an emptying channel 14.
  • an inlet channel 15 filled with fluid at high pressure is formed in the valve housing 1 and the insert 2, from which a branch 16 designed as a throttle leads to a pressure chamber 17.
  • the pressure chamber 17 is arranged adjacent to a piston 18 which rests on the opposite side of the pressure chamber 17 at an extension of the valve needle 19 of the injection valve.
  • the piston 18 moves upwards together with the valve needle 19 of the injection valve, so that the injection valve moves a fluid, e.g. can inject into a combustion chamber.
  • the insert 2 As in FIG. 2 is shown in the insert 2 is a bore 20 in which the pin 5 is inserted, for example with a press fit. On the pin 5 is the piston 4, which is otherwise pressed by the pressure of the fluid in the figures upwards.
  • FIG. 3 the front portion of the control valve is shown enlarged, wherein the valve needle 3 is in the closed position.
  • a front end portion 21 of the valve needle 3 is frusto-conical and with a sealing edge 22, the valve needle 3 abuts against the valve seat 33 of the insert 2.
  • valve needle 3 has on the outside a pressure surface 23 delimited by the diameter D and the bore 25.
  • the fluid under pressure reaches an interior space and acts there on the valve needle 3, the area resulting from the axial force 24 and the piston 4, the cross-sectional area of diameter D, at the same diameter of the guide 12.
  • the valve needle 3 are considered. Since the axial compressive forces on the pressure surfaces 23 and 24 are almost equal and act in the opposite direction, they cancel each other out.
  • valve needle 3 In FIG. 4 the valve needle 3 is shown in the open position.
  • the fluid contained in the pressure chamber 17 can flow into the channel 14, so that the injection valve needle 19 is moved.
  • the solenoid 7 no longer lifts the valve needle 3, due to the force of the spring 8, the valve needle 3 is again pressed into the closed position and a corresponding pressure builds up in the pressure chamber 17 and also closes the injection valve needle 19 of the injection valve.
  • the front end portion of the valve needle 3 ' is slightly modified to reduce when opening the valve needle 3' occurring due to flow resistance axial forces.
  • a stepped free position is formed above the sealing edge 22 on the valve needle 3 ', which is composed of two conical surfaces 30 and 31 together.
  • the invention is not limited to the illustrated embodiment.
  • the geometry of the end section of the valve needle 3 can be varied in order to have defined flow conditions when the valve needle 3 is opened.
  • the angle W between the stepped portion 30 and a tapered portion 32 may be chosen so as to have optimum flow conditions.

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)
  • Magnetically Actuated Valves (AREA)
EP04006631A 2004-03-19 2004-03-19 Steuerventil für ein Einspritzventil Expired - Lifetime EP1577540B1 (de)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP04006631A EP1577540B1 (de) 2004-03-19 2004-03-19 Steuerventil für ein Einspritzventil
DK04006631.8T DK1577540T3 (da) 2004-03-19 2004-03-19 Styreventil til en brændstofindsprøjtningsventil
AT04006631T ATE469298T1 (de) 2004-03-19 2004-03-19 Steuerventil für ein einspritzventil
DE502004011204T DE502004011204D1 (de) 2004-03-19 2004-03-19 Steuerventil für ein Einspritzventil

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP04006631A EP1577540B1 (de) 2004-03-19 2004-03-19 Steuerventil für ein Einspritzventil

Publications (2)

Publication Number Publication Date
EP1577540A1 EP1577540A1 (de) 2005-09-21
EP1577540B1 true EP1577540B1 (de) 2010-05-26

Family

ID=34833653

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04006631A Expired - Lifetime EP1577540B1 (de) 2004-03-19 2004-03-19 Steuerventil für ein Einspritzventil

Country Status (4)

Country Link
EP (1) EP1577540B1 (da)
AT (1) ATE469298T1 (da)
DE (1) DE502004011204D1 (da)
DK (1) DK1577540T3 (da)

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE745480C (de) * 1941-05-03 1944-03-02 Concordia Maschinen Und Elek Z Elektromagnetisch betaetigtes Ventil
FR2068857A5 (da) * 1969-10-24 1971-09-03 Sofredi
DE19605277B4 (de) * 1995-02-15 2004-06-03 Nippon Soken, Inc., Nishio Magnetbetätigtes hydraulisches Steuerventil zur Verwendung im Kraftstoffeinspritzsystem eines Verbrennungsmotors
DE10066102B4 (de) * 2000-09-20 2004-12-16 L'orange Gmbh Steuerventil für einen Einspritzinjektor
DE10103089A1 (de) * 2001-01-24 2002-08-08 Bosch Gmbh Robert 3/2-Wegeventil
DE10111929A1 (de) * 2001-03-13 2002-10-02 Bosch Gmbh Robert Sitz/Schieber-Ventil mit Druckausgleichsstift

Also Published As

Publication number Publication date
DE502004011204D1 (de) 2010-07-08
ATE469298T1 (de) 2010-06-15
DK1577540T3 (da) 2010-09-13
EP1577540A1 (de) 2005-09-21

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