EP0923672B1 - Ventil zum steuern von flüssigkeiten - Google Patents
Ventil zum steuern von flüssigkeiten Download PDFInfo
- Publication number
- EP0923672B1 EP0923672B1 EP98921340A EP98921340A EP0923672B1 EP 0923672 B1 EP0923672 B1 EP 0923672B1 EP 98921340 A EP98921340 A EP 98921340A EP 98921340 A EP98921340 A EP 98921340A EP 0923672 B1 EP0923672 B1 EP 0923672B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- piston
- valve
- pressure
- valve member
- actuator
- 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
Links
Images
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
- F02M63/0026—Valves characterised by the valve actuating means electrical, e.g. using solenoid using piezoelectric or magnetostrictive actuators
-
- 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
- F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
- F02M2200/03—Fuel-injection apparatus having means for reducing or avoiding stress, e.g. the stress caused by mechanical force, by fluid pressure or by temperature variations
-
- 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
- F02M2200/16—Sealing of fuel injection apparatus not otherwise provided for
-
- 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
- F02M2200/70—Linkage between actuator and actuated element, e.g. between piezoelectric actuator and needle valve or pump plunger
- F02M2200/703—Linkage between actuator and actuated element, e.g. between piezoelectric actuator and needle valve or pump plunger hydraulic
-
- 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 a valve for controlling liquids according to the preamble of claim 1.
- a valve for controlling liquids according to the preamble of claim 1.
- EP-A-0 816 670 such a valve is known.
- the actuating piston of the Valve member in a part of a smaller diameter Stepped bore arranged tightly displaceable, whereas an in Diameter of larger pistons that are moved with the piezo actuator, arranged in a larger diameter part of the stepped bore and is sealed to the outside by an elastic seal is.
- control valve according to the invention with the features of Characteristic of claim 1 has the opposite Advantage that the lekage is reduced.
- advantages are simplicity and value for money Solution.
- variety of Possible solutions to the proposal are the selection of those for the the cheapest variants for different applications.
- FIG. 1 shows a fuel injection valve in section
- Figure 2 a as a movable wall Coupling space working piston with an end 3 shows a piston arrangement on a coupling space
- Figure 4 shows a piston arrangement on another Coupling space
- Figure 5 is a differently shaped front Recess
- Figure 6 a piston with a pressed Ring
- Figure 7 shows another annular space arrangement on a piston
- Figure 8 shows another ring shape.
- the valve according to the invention is used in a Fuel injection valve, which in the main in Section is shown in Figure 1.
- This injector has a valve housing 1, in which in a longitudinal bore 2 a valve needle 3 is guided. On her one The end is the valve needle with a conical sealing surface 4 provided at the tip 5 projecting into the combustion chamber of the valve housing cooperates with a seat 6, of which lead out of injection openings that into the interior of the Injection valve, here with the valve needle 3 surrounding fuel-filled annular space under injection pressure 7 connect to the combustion chamber so as to close an injection complete when the valve needle is lifted from its seat Has.
- the annular space is connected to a further pressure space 8, who is constantly in connection with a pressure line 10 stands over which the fuel injector from one High-pressure fuel accumulator 9 Fuel under injection pressure is fed.
- This high fuel pressure also works in the pressure chamber 8 and there on a pressure shoulder 11, over the nozzle needle in a known manner at suitable Conditions can be lifted off their valve seat.
- valve needle At the other end of the valve needle is in a cylinder bore 12 out there and closes with its end face 14 a control pressure chamber 15, which via a throttle connection 16 with is constantly connected to an annular space 17 which like the pressure chamber 8 always with the high-pressure fuel reservoir communicates.
- Axial leads from the control pressure chamber 15 a throttle bore 19 to a valve seat 20 of a control valve 21.
- a valve seat 20 acts Valve member 22 of the control valve 21 together, which is lifted off State a connection between the control pressure chamber 15 and a relief room.
- valve member 22 is in the closing direction by a compression spring 24, So acted on the valve seat 20, so that in the normal position of the control valve this connection of Control pressure chamber 15 is closed. Because the front Area of the valve needle in the area of the control pressure chamber is larger than the area of the pressure shoulder 11, the holds same fuel pressure in the control pressure chamber that in the Pressure chamber 8 prevails, now the valve needle in the closed Position. If the valve member 22 is lifted, however the pressure in the control pressure chamber 15 is relieved due to the throttling effect of the throttle connection 16. In the now missing valve force opens the valve needle quickly and can, on the other hand, be brought into the closed position as soon as the valve member 22 comes back into the closed position. From at this point, the throttle 16 then builds up quickly the original high fuel pressure in the control pressure chamber 15 back on.
- the control valve has one to it Actuation determined piston 25 on the valve member 22 acts.
- the piston 25 is in a guide bore 28 tightly guided and limited with its end face 29 Coupling space 30, which on its opposite wall of completed an actuator piston 31 of larger diameter which is part of a piezo actuator 32. Both pistons 25 and 31 are tightly guided in their holes.
- the coupling space 30 serves because of the different piston surfaces two pistons 25 and 31 as a pressure booster chamber in which he a design-related small stroke of the piezo actuator piston 31 in a larger stroke of the control valve 21st actuating piston 25 translated.
- the pressure is present in the coupling space 30. From the pressure difference that results from outside and inside forces Expansion capacity of the piston depending on the Coupling space 30 prevailing pressure.
- Figure 2 is represented by vectors 36, as in the case of pressure the course of force takes place. It can be spotted, that in the area of the end face 29 the deformability of the Piston and thus one resulting from this deformation Widening of the piston is greatest. From the expansion the piston 25 results in a sealing force that is close the face where the greatest sealing problems occur, is greatest. The one widened by the pressure The outer surface of the piston 25 has the reference number 37 Mistake. It can be seen that with the help of the invention Contact pressure amplification device 35 a reliable Leka reduction is achieved.
- FIG. 3 shows the coupling space 30 with the two pistons 25 and 31, both with a blind bore 33 and 34, respectively are provided.
- the two pistons 33 and 34 are on the same axis 38.
- Figure 4 it is shown that the Axes of the two pistons can also be offset in parallel, to save overall height.
- a coupling room carries the Reference number 39.
- Figure 5 shows that it is also possible instead a cylindrical blind bore 33 or 34 as a contact pressure intensifying device 40 a concave version 41 in the To bring end face 29 of a piston 42.
- in 6 shows a piston type, in which a Piston 43 on its piston head 44 with a pressed-on, preferably shrunk ring 45 is equipped.
- This Ring 45 has a front internal recess 46 which is hollow cylindrical is formed so that an annular cylindrical Edge 47 arises in the manner of an annular sealing lip is relatively easy to expand. So here is one Contact pressure amplification device 48 created.
- Figure 8 finally treats one like a piston ring slotted ring 54 which is cylindrical on the outside and its Inner ring surface 55 one of a coupling space 56 to has increasing cross-section at the back, that is, conical is.
- the inner ring surface 55 here Contact pressure amplification device 57.
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
Description
Claims (8)
- Ventil zum Steuern von Flüssigkeiten mit einem Ventilglied (22), das einen zu seiner Betätigung bestimmten Kolben (25, 42, 43) aufweist, der von einer Druckfeder (24) in Schließrichtung des Ventilgliedes (22) zur Auflage auf einen Ventilsitz (20) beaufschlagt ist und der einen hydraulischen Kopplungsraum (30, 39, 53, 56) als bewegliche Wand abschließt, der andererseits von einem Aktorkolben (31, 59) eines Piezoaktors (32) begrenzt wird, durch dessen Arbeitshub eine Druckerhöhung im Kopplungsraum (30, 39, 53, 56) erzeugbar ist, durch die der Kolben (25, 42; 43) gegen die Kraft der Druckfeder (24) in Ventil-Öffnungsrichtung verstellbar ist, dadurch gekennzeichnet, daß der Aktorkolben und der das Ventilglied betätigende Kolben in Bohrungen (28) geführt sind, wobei die Führung einer Lekage unterliegt, und der zwischen dem Aktorkolben (31, 59) und dem das Ventilglied (22) betätigenden Kolben (25, 42, 43) eingeschlossene Kopplungsraum (30, 39, 53, 56) zumindest auf einer Seite mit einer am Aktorkolben (31, 59) und/oder am Kolben (25, 42, 43) vorgesehenen Anpressdruckverstärkungseinrichtung (35, 40, 48, 52, 57) ausgerüstet ist, die daraus besteht, daß am Aktorkolben und/oder dem das Ventilglied betätigende Kolben radial aufweitbare Teile vorgesehen sind, die einer Druckdiffenrenz zwischen dem im Kopplungsraum herrschenden Druck und dem zwischen der führenden Bohrung und dem Aktorkolben und/oder dem das Ventilglied betätigende Kolben herrschenden Druck ausgesetzt sind und sich unter der Druckdifferenz verformen, derart, daß der Anpreßdruck zwischen der jeweiligen Bohrung und dem Aktorkolben und/oder dem das Ventilglied betätigende Kolben erhöht wird.
- Ventil nach Anspruch 1, dadurch gekennzeichnet, daß die Anpressdruckverstärkungseinrichtung (35, 40) eine stirnseitig und konzentrisch in den Aktorkolben (31) und/oder in den das Ventilglied (22) betätigenden Kolben (25, 42) eingebrachte Sackbohrung (33, 34, 41) ist.
- Ventil nach Anspruch 2, dadurch gekennzeichnet, daß die Sackbohrung (33, 34) zylindrisch ist.
- Ventil nach Anspruch 2, dadurch gekennzeichnet, daß die Sackbohrung eine konkave Aushöhlung (41) ist.
- Ventil nach Anspruch 1, dadurch gekennzeichnet, daß die Anpressdruckverstärkungseinrichtung (53) durch einen am Kolbenkopf (44) festgespannten Ring (45, 54) mit einer stirnseitig angeordneten Innenaussparung (46) gebildet ist.
- Ventil nach Anspruch 5, dadurch gekennzeichnet, daß die Innenaussparung (46) des Ringes (45) hohlzylindrisch ist.
- Ventil nach Anspruch 5, dadurch gekennzeichnet, daß die Innenaussparung des Ringes (54) durch eine kegelige Innenringfläche (55) gebildet ist.
- Ventil nach Anspruch 7, dadurch gekennzeichnet, daß der Ring (54) wie ein Kolbenring geschlitzt ist.
Applications Claiming Priority (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19728077 | 1997-07-02 | ||
DE19728077 | 1997-07-02 | ||
DE19756669 | 1997-12-19 | ||
DE19756669A DE19756669A1 (de) | 1997-07-02 | 1997-12-19 | Ventil zum Steuern von Flüssigkeiten |
PCT/DE1998/000698 WO1999001662A1 (de) | 1997-07-02 | 1998-03-10 | Ventil zum steuern von flüssigkeiten |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0923672A1 EP0923672A1 (de) | 1999-06-23 |
EP0923672B1 true EP0923672B1 (de) | 2003-02-26 |
Family
ID=26037929
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP98921340A Expired - Lifetime EP0923672B1 (de) | 1997-07-02 | 1998-03-10 | Ventil zum steuern von flüssigkeiten |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP0923672B1 (de) |
JP (1) | JP2001500214A (de) |
CN (1) | CN1095035C (de) |
RU (1) | RU2200248C2 (de) |
WO (1) | WO1999001662A1 (de) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102007001363A1 (de) * | 2007-01-09 | 2008-07-10 | Robert Bosch Gmbh | Injektor zum Einspritzen von Kraftstoff in Brennräume von Brennkraftmaschinen |
JP6828443B2 (ja) * | 2017-01-10 | 2021-02-10 | 株式会社デンソー | 燃料噴射装置 |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0816670A1 (de) * | 1996-07-02 | 1998-01-07 | Siemens Automotive Corporation | Piezoelektrisch gesteuertes Einspritzventil mit hydraulischer Vergrösserung des Hubs |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH07117012B2 (ja) * | 1986-09-05 | 1995-12-18 | トヨタ自動車株式会社 | ユニツトインジエクタ |
ATE192263T1 (de) | 1990-09-25 | 2000-05-15 | Siemens Ag | Anordnung für einen in hubrichtung wirkenden adaptiven, mechanischen toleranzausgleich für den wegtransformator eines piezoelektrischen aktors |
DE4306072C2 (de) * | 1993-02-26 | 1994-12-08 | Siemens Ag | Vorrichtung zum Öffnen und Verschließen einer in einem Gehäuse vorhandenen Durchtrittsöffnung |
DE19646847A1 (de) * | 1996-11-13 | 1997-06-12 | Heinz Schmidt | Anordnung eines modularen hydraulischen Stellwegtransformators mit variierbarem Übersetzungsverhältnis zur Übersetzung von Stellwagen von Festkörperenergiewandlern oder dergleichen |
-
1998
- 1998-03-10 EP EP98921340A patent/EP0923672B1/de not_active Expired - Lifetime
- 1998-03-10 JP JP11506061A patent/JP2001500214A/ja active Pending
- 1998-03-10 WO PCT/DE1998/000698 patent/WO1999001662A1/de not_active Application Discontinuation
- 1998-03-10 CN CN98800915A patent/CN1095035C/zh not_active Expired - Fee Related
- 1998-03-10 RU RU99106405/06A patent/RU2200248C2/ru not_active IP Right Cessation
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0816670A1 (de) * | 1996-07-02 | 1998-01-07 | Siemens Automotive Corporation | Piezoelektrisch gesteuertes Einspritzventil mit hydraulischer Vergrösserung des Hubs |
Also Published As
Publication number | Publication date |
---|---|
EP0923672A1 (de) | 1999-06-23 |
WO1999001662A1 (de) | 1999-01-14 |
CN1231020A (zh) | 1999-10-06 |
JP2001500214A (ja) | 2001-01-09 |
RU2200248C2 (ru) | 2003-03-10 |
CN1095035C (zh) | 2002-11-27 |
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