EP0947690B1 - Ventil zum Steuern von Flüssigkeiten - Google Patents
Ventil zum Steuern von Flüssigkeiten Download PDFInfo
- Publication number
- EP0947690B1 EP0947690B1 EP98123744A EP98123744A EP0947690B1 EP 0947690 B1 EP0947690 B1 EP 0947690B1 EP 98123744 A EP98123744 A EP 98123744A EP 98123744 A EP98123744 A EP 98123744A EP 0947690 B1 EP0947690 B1 EP 0947690B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- valve
- pressure
- piston
- control
- pressure chamber
- 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
- 239000012530 fluid Substances 0.000 title description 2
- 230000007704 transition Effects 0.000 claims description 7
- 239000007788 liquid Substances 0.000 claims description 6
- 230000006835 compression Effects 0.000 claims description 4
- 238000007906 compression Methods 0.000 claims description 4
- 239000000446 fuel Substances 0.000 description 10
- 238000002347 injection Methods 0.000 description 7
- 239000007924 injection Substances 0.000 description 7
- 238000010586 diagram Methods 0.000 description 6
- 239000012528 membrane Substances 0.000 description 4
- 238000002485 combustion reaction Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
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
- F02M2200/28—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
- F02M2200/70—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
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.
- Actuating piston of the valve member in one in diameter smaller part of a stepped bore is arranged so that it can be moved, whereas a piston with a larger diameter, with the piezo actuator is moved in a larger diameter Part of the stepped bore is arranged.
- a piston with a larger diameter, with the piezo actuator is moved in a larger diameter Part of the stepped bore is arranged.
- Between the two A hydraulic space is clamped in the piston, such that when the larger piston through the actuator by a certain Distance is moved, the actuating piston of the valve member one around the gear ratio of the stepped bore diameter enlarged stroke makes.
- the piston and the piezo actuator lie on a common axis behind each other.
- the valve according to the invention with the characteristic features of claim 1 has the advantage that the pressure chamber does not lose any liquid.
- A is disadvantageous change in length of the entire device avoided, even if the piezo actuator, the valve or the housing its length changes, for example, when heated.
- the facility has a simple structure, and it a safe and reliable seal is created.
- 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 from which Discharge injection openings that lead into the interior of the injection valve, here the valve needle 3 surrounding, below Injection standing fuel filled annular space 7 and connect it to the combustion chamber to create one To perform injection when the valve needle of her Has lifted the seat.
- the annulus is with another Pressure chamber 8 connected, which is constantly in connection with a Pressure line 10 is through which the fuel injector from a high-pressure fuel reservoir not shown Fuel is supplied under injection pressure.
- This high fuel pressure also acts in the pressure chamber 8 and there on a pressure shoulder 11, over which in known Way the valve needle in suitable conditions of their Valve seat can be lifted off.
- 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 is permanently connected to an annular space 17 which, like the pressure chamber 8, continuously with the high-pressure fuel accumulator communicates.
- Axial leads from the control pressure chamber 15 a throttle bore 19 from to a valve seat 20 of a control valve 21.
- the valve seat 20 acts Valve member 22 of the control valve 21 together, which is in the off State a connection between the control pressure chamber 15 and a spring chamber 18, which in turn constantly is connected to a relief room.
- valve member 22 loading in the closing direction Compression spring 23 arranged, the valve member 22 on the Valve seat 20 acted out so that in the normal position of the Control valve 21 this connection of the control pressure chamber 15th is closed. Because the face of the valve needle 3 in the area of the control pressure chamber 15 is greater than that Surface of the pressure shoulder 11 holds the same fuel pressure in the control pressure chamber, which also prevails in the pressure chamber 8, now the valve needle 3 in the closed position. If the valve member 22 is lifted off, however, the pressure in the control pressure chamber decoupled via the throttle connection 16 15 relieved. With the now missing closing force opens the valve needle 3 quickly and on the other hand can be in the closed position be brought as soon as the valve member 22 again comes into the closed position. From that point on, it builds up then quickly over the throttle 16 of the original high Fuel pressure in the control pressure chamber 15 again.
- the valve according to the invention has as an actuator a piezo actuator 24, which has a hydraulic Translator 25 with a hydraulic pressure chamber 26 engages on a shaft 27 of the valve member 22.
- the Pressure chamber 26 is on the one hand by a piston 28 of the piezo actuator 24 limited, on the other hand it has a piston 29 as movable wall that communicates with the valve member shaft 27 stands.
- control chamber 32 and 33 Seen from the pressure chamber 26 on the back 30 or 31 of each piston 28 and 29 form a control chamber 32 and 33, the actuator or valve side of a membrane 34 or 35 is tightly closed.
- the pressure chamber 26 is in the Work of the injector under high pressure, which over the Piston guides of the two pistons 28 and 29 a small Leakage oil flow in the control rooms 32 and 33 causes. Thereby these control rooms 32 and 33 are filled with leak oil, which but the pressure chamber 26 must be returned to the hydraulic translator 25 to keep constant length.
- each control room 32 or 33 there is one at its other Throttle bore 36 or 37 closed with a ball connected.
- the throttle bores 36 and 37 have over a drain hole 40 connection to a not shown Low pressure source.
- Each throttle bore 36 or 37 is in Relief direction with a sharp-edged transition 38 and provided with a rounded transition 39 in the filling direction. This measure ensures that a liquid flow, the entrance on the sharp-edged transition 38 hits, is throttled more than a liquid flow, the return flow over the rounded transition 39 flows, which means that a drain from the control rooms 32nd and 33 is more hampered than refilling the Pressure chamber 26 serving inflow.
- the piezo actuator stroke is smaller, it generates depending on the larger the valve lift.
- FIG. 5 shows an initial one using a pressure curve 41 great pressure in the control room 32, the one with the piezo stroke begins and then drops with the movement of the valve piston 29. If the piezo is switched off and thus enables one Return stroke, a pressure drop occurs at 42 until the Valve piston followed the piezo. About this pressure change the control chamber 32 is refilled.
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)
- Electrically Driven Valve-Operating Means (AREA)
- General Electrical Machinery Utilizing Piezoelectricity, Electrostriction Or Magnetostriction (AREA)
Description
- 1
- Ventilgehäuse
- 2
- Längsbohrung
- 3
- Ventilnadel
- 4
- Dichtfläche
- 5
- Spitze
- 6
- -
- 7
- Ringraum
- 8
- Druckraum
- 9
- -
- 10
- Druckleitung
- 11
- Druckschulter
- 12
- Zylinderbohrung
- 13
- -
- 14
- Stirnseite
- 15
- Steuerdruckraum
- 16
- Drosselverbindung
- 17
- Ringraum
- 18
- -
- 19
- Drosselbohrung
- 20
- Ventilsitz
- 21
- Steuerventil
- 22
- Ventilglied
- 23
- Druckfeder
- 24
- Piezoaktor
- 25
- hydraulischer Übersetzer
- 26
- Druckraum
- 27
- Schaft
- 28
- Kolben
- 29
- Kolben
- 30
- Rückseite
- 31
- Rückseite
- 32
- Steuerraum
- 33
- Steuerraum
- 34
- Membran
- 35
- Membran
- 36
- Drosselbohrung
- 37
- Drosselbohrung
- 38
- Übergang
- 39
- Übergang
- 40
- Leckölbohrung
- 41
- Druckkurve
- 42
- Tal
- 43
- Druckkurve
- 44
- Tal
Claims (2)
- Ventil zum Steuern von Flüssigkeiten mit einem über einen hydraulischen Übersetzer (25) betätigbaren Ventilglied (22), das von einer Druckfeder (23) in Schließrichtung auf seinen Ventilsitz (20) beaufschlagt ist, wobei der hydraulische Übersetzer (25) einen Druckraum (26) aufweist, der einerseits von einem Kolben (28) eines Piezoaktors (24) begrenzt wird, durch dessen Bewegung eine Druckveränderung im Druckraum (26) entsteht, die andererseits auf einen ebenfalls den Druckraum (26) begrenzenden Kolben (29) des Ventilgliedes (22) einwirkt, durch den das Ventilglied (22) gegen die Kraft der Druckfeder (23) in Öffnungsrichtung verstellbar ist, dadurch gekennzeichnet, daß auf der Rückseite mindestens des einen Kolbens (28 bzw. 29) ein Steuerraum (32 bzw. 33) gebildet ist, der aktor- und/oder ventilseitig von einer Membran (34 bzw. 35) dicht abgeschlossen ist und der mit Lecköl aus dem Druckraum (26) gefüllt ist, und daß in den Steuerraum (32 bzw. 33) eine Drosselbohrung (36 bzw. 37) einmündet, die an eine Niederdruckquelle angeschlossen ist,
- Ventil nach Anspruch 1, dadurch gekennzeichnet, daß die Drosselbohrung (36 bzw. 37) in Entlastungsrichtung einen scharfkantigen und in Füllrichtung einen gerundeten Übergang (38 und 39) aufweist.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19813983A DE19813983A1 (de) | 1998-03-28 | 1998-03-28 | Ventil zum Steuern von Flüssigkeiten |
DE19813983 | 1998-03-28 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0947690A2 EP0947690A2 (de) | 1999-10-06 |
EP0947690A3 EP0947690A3 (de) | 2002-06-12 |
EP0947690B1 true EP0947690B1 (de) | 2003-10-01 |
Family
ID=7862828
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP98123744A Expired - Lifetime EP0947690B1 (de) | 1998-03-28 | 1998-12-14 | Ventil zum Steuern von Flüssigkeiten |
Country Status (4)
Country | Link |
---|---|
US (1) | US6089529A (de) |
EP (1) | EP0947690B1 (de) |
JP (1) | JP2000046220A (de) |
DE (2) | DE19813983A1 (de) |
Families Citing this family (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19743669A1 (de) * | 1997-10-02 | 1999-04-08 | Bosch Gmbh Robert | Ventil zum Steuern von Flüssigkeiten |
DE19951964A1 (de) | 1999-10-28 | 2001-05-03 | Bosch Gmbh Robert | Kraftstoffeinspritzventil für Brennkraftmaschinen |
DE19954288A1 (de) | 1999-11-11 | 2001-05-17 | Bosch Gmbh Robert | Kraftstoffeinspritzventil für Brennkraftmaschinen |
DE10002270C1 (de) | 2000-01-20 | 2001-06-28 | Bosch Gmbh Robert | Ventil zum Steuern von Flüssigkeiten |
DE10007175B9 (de) * | 2000-02-17 | 2004-11-04 | Siemens Ag | Einspritzventil für die Einspritzung von Kraftstoff in eine Verbrennungskraftmaschine |
DE10006785A1 (de) * | 2000-02-18 | 2001-09-27 | Bosch Gmbh Robert | Einspritzeinrichtung, Steuerventil und Verfahren zum Einspritzen von Fluid |
DE10023952A1 (de) * | 2000-05-16 | 2001-11-29 | Bosch Gmbh Robert | Ventil zum Steuern von Flüssigkeiten |
DE10024702A1 (de) * | 2000-05-18 | 2001-11-22 | Bosch Gmbh Robert | Einspritzanordnung für ein Kraftstoff-Speichereinspritzsystem einer Verbrennungsmaschine |
DE10029297A1 (de) * | 2000-06-14 | 2001-10-18 | Bosch Gmbh Robert | Ventil zum Steuern von Flüssigkeiten |
DE10030232A1 (de) * | 2000-06-20 | 2002-01-17 | Siemens Ag | Vorrichtung zum Übertragen einer Bewegung mit Spielausgleich |
DE10037388A1 (de) * | 2000-08-01 | 2002-02-21 | Bosch Gmbh Robert | Ventilanordnung, insbesondere für ein Kraftstoffeinspritzsystem einer Verbrennungsmaschine |
DE10107222C1 (de) * | 2001-02-16 | 2002-08-29 | Bosch Gmbh Robert | Vorrichtung zum Steuern von Flüssigkeiten |
DE10230089A1 (de) * | 2002-07-04 | 2004-01-15 | Robert Bosch Gmbh | Brennstoffeinspritzventil |
DE102017202310A1 (de) * | 2017-02-14 | 2018-08-16 | Robert Bosch Gmbh | Drosselelement sowie Niederdruckkreislauf eines Kraftstoffeinspritzsystems mit einem Drosselelement |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62107265A (ja) * | 1985-11-02 | 1987-05-18 | Nippon Soken Inc | 電歪式油圧制御弁 |
JPH0656162B2 (ja) * | 1987-03-03 | 1994-07-27 | トヨタ自動車株式会社 | ストロ−ク可変装置 |
DE59010904D1 (de) * | 1990-09-25 | 2000-05-31 | 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 |
DE19519192C1 (de) * | 1995-05-24 | 1996-06-05 | Siemens Ag | Einspritzventil |
-
1998
- 1998-03-28 DE DE19813983A patent/DE19813983A1/de not_active Withdrawn
- 1998-12-14 EP EP98123744A patent/EP0947690B1/de not_active Expired - Lifetime
- 1998-12-14 DE DE59809801T patent/DE59809801D1/de not_active Expired - Fee Related
-
1999
- 1999-03-26 JP JP11084387A patent/JP2000046220A/ja active Pending
- 1999-03-29 US US09/280,687 patent/US6089529A/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
US6089529A (en) | 2000-07-18 |
DE59809801D1 (de) | 2003-11-06 |
DE19813983A1 (de) | 1999-09-30 |
EP0947690A3 (de) | 2002-06-12 |
EP0947690A2 (de) | 1999-10-06 |
JP2000046220A (ja) | 2000-02-18 |
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