EP1144845B1 - Vorrichtung zum übertragen einer aktorauslenkung auf ein stellglied und einspritzventil mit einer solchen vorrichtung - Google Patents
Vorrichtung zum übertragen einer aktorauslenkung auf ein stellglied und einspritzventil mit einer solchen vorrichtung Download PDFInfo
- Publication number
- EP1144845B1 EP1144845B1 EP99962111A EP99962111A EP1144845B1 EP 1144845 B1 EP1144845 B1 EP 1144845B1 EP 99962111 A EP99962111 A EP 99962111A EP 99962111 A EP99962111 A EP 99962111A EP 1144845 B1 EP1144845 B1 EP 1144845B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- actuator
- valve
- pressure chamber
- recess
- female element
- 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
- 238000002347 injection Methods 0.000 title claims description 25
- 239000007924 injection Substances 0.000 title claims description 25
- 238000006073 displacement reaction Methods 0.000 title abstract 2
- 239000000446 fuel Substances 0.000 claims description 7
- 238000002485 combustion reaction Methods 0.000 claims description 4
- 230000007935 neutral effect Effects 0.000 claims 2
- 230000005540 biological transmission Effects 0.000 abstract description 38
- 230000000284 resting effect Effects 0.000 abstract 1
- 235000001674 Agaricus brunnescens Nutrition 0.000 description 9
- 239000012528 membrane Substances 0.000 description 8
- 238000000034 method Methods 0.000 description 7
- 239000012530 fluid Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 230000003111 delayed effect Effects 0.000 description 3
- 230000004913 activation Effects 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 230000006735 deficit Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000002828 fuel tank Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 230000001960 triggered effect Effects 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
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/20—Adjusting or compensating clearance
- F01L1/22—Adjusting or compensating clearance automatically, e.g. mechanically
- F01L1/24—Adjusting or compensating clearance automatically, e.g. mechanically by fluid means, e.g. hydraulically
-
- 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
- F02M51/00—Fuel-injection apparatus characterised by being operated electrically
- F02M51/06—Injectors peculiar thereto with means directly operating the valve needle
- F02M51/0603—Injectors peculiar thereto with means directly operating the valve needle using piezoelectric or magnetostrictive operating means
Definitions
- the invention relates to a device for transmission a movement of an actuator according to the preamble of the claim 1 and in particular an injection valve with a such device.
- a device - in the further also referred to as a transmission module - is from DE 197 08 304 A1 known.
- the actuator in the injection valve usually actuates a servo valve that hydraulically presses a nozzle needle controls in the injector.
- a servo valve that hydraulically presses a nozzle needle controls in the injector.
- a transmission module that is substantially cylindrical is formed and has a pressure chamber which of a flexible membrane is limited. At this flexible The drive stamp of the servo valve lies against the membrane.
- the pressure chamber of the transmission module is through a connection hole with throttling effect with another, inside the Transmission module provided compensation chamber connected, the pressure chamber and the compensation chamber with a hydraulic fluid are filled.
- the in pressure of the hydraulic fluid prevailing in the compensation chamber transferred to the pressure chamber so that the flexible membrane always on the drive stamp of the servo valve, too if due to thermal effects or aging processes Shifts in the arrangement of the individual components in the Injector result.
- the actuator is actuated the deflection of this actuator via the transmission module in the essentially unchanged on the drive stamp of the servo valve transfer.
- the connecting hole between the Pressure chamber and the compensation chamber is designed so that due to the activation times in the range of milliseconds essentially no hydraulic fluid from the Pressure chamber can drain.
- the object of the present invention is a transmission module ready to provide high reliability and long service life and a subdued Transfer of actuator deflection to an actuator allows.
- the transmission module according to the invention is preferably used in an injection valve for Internal combustion engines applied.
- a transmission module is distinguished by a piston element and a receiving element, which is telescopic interlock and a pressure chamber with the Enclose hydraulic medium.
- the piston element and that Receiving elements are designed to be axially displaceable relative to one another, with an actuator deflection from a rest position, where a connection between the pressure chamber and one compensation chamber is completely open, in a second Position in which the connection between the pressure chamber and the compensation chamber is essentially interrupted become.
- the transmission module according to the invention stands out by a simple structure, with component changes due to manufacturing tolerances, temperature fluctuations and wear effects are reliably balanced and bridged become. Furthermore, the hydraulic medium is in the Transmission module not under an increased pressure, which too a liquid leakage and thus an impairment the functionality of the transmission module.
- the transmission module according to the invention enables a damped and delayed transmission the actuator deflection on an actuator. This will make the Dynamic of the actuator is reduced when opening, so that e.g. a combustion-technically favorable course when opening of an injection valve can be adjusted.
- the cross section shown in Fig. 1 by an actuator an injection valve consists essentially of a Valve housing 1 with a step-like inner bore 11, a piezoelectric actuator 2 and a servo valve 3.
- the piezoelectric actuator 2 is preferred from several stacked piezoelectric Elements built up in a tube spring designed Hollow body 22 are arranged. This hollow body 22 is with a head plate 23 and a bottom plate 24, wherein the piezoelectric actuator 2 with a defined force of preferably 800 to 1000 N is biased.
- the piezoelectric Actuator 2 is conductive via protruding from the top plate 23 Contact pins connected to an actuator connection 4, voltage across the actuator via the actuator connection Actuator 2 created and so a longitudinal expansion of the piezoelectric Actuator is caused.
- the piezoelectric actuator 2 is further in an actuator housing 25 arranged at the upper end of the stepped Inner bore 11 firmly clamped in the valve housing 1 is, the actuator housing 25 to an annular circumferential Washer 8 is pressed against a paragraph in the Inner bore 11 of the valve housing 1 is supported.
- the actuator housing 25 is also held by a hollow screw 7, the one around the actuator housing 25 Tension ring 26 attacks and screwed to the valve housing 1 is.
- the bottom plate 24 of the piezoelectric actuator 2 is provided with a preferably circular attachment 241 in the center, on which a disc-shaped membrane 6 is arranged, extending from the base plate 24 to the inner wall of the valve housing 1 extends.
- the membrane 6 in her Outside area between the support plate 8 and the actuator housing 25 captured.
- the membrane 6 serves the piezoelectric Actuator 2 before a fuel leak from the injection valve to protect.
- the deflection of the piezoelectric generated by electrostriction Actuator 2 is operated by a transmission module 5 transferred to the servo valve 3.
- the transmission module 5 exists essentially from a piston element 51, hereinafter also referred to as a drive piston, and a receiving element 52.
- the drive piston 51 has essentially in cross section T-shape and is with its foot 511 in a central position in the base plate 24 inner bore screwed in and preferably additionally glued.
- the drive piston is also located 51 with the back of its substantially cylindrical Plates 512 on top 241 of the base plate 24 of the actuator 2, with the disc-shaped membrane 6 with their interior between the attachment 241 and the plate 512 is clamped.
- the receiving element 52 of the transmission module 5 has in its cross section is also essentially T-shaped and is in one piece with one in the inner bore 11 of the valve housing 1 arranged valve piston 31 connected.
- This valve piston 31 is part of the servo valve 3.
- the servo valve 3 further comprises a valve mushroom 32, on which the valve piston 23 rests, the valve mushroom 32 being at rest by a valve spring 33 pressed onto a valve seat 111 in valve housing 1 becomes.
- the receiving element 52 essentially has cylindrical plate 521 a cylindrical axial recess 522, the inside diameter of which is somewhat larger is designed as the outer diameter of the drive piston plate 512.
- the drive piston 51 extends with his plate 512 into the recess in the plate 521 of the receiving element 52, with a distance ⁇ s between an end face 513 of the drive piston 51 and a stop surface 523 is provided in the recess 522 of the receiving element 52.
- the drive piston 51 and the receiving element 52 form a telescopic arrangement that is pushed together by the distance ⁇ s can be.
- the one Form pressure chamber 91 In the end face 513 of the plate 512 in the drive piston 51 and in the stop surface 523 of the recess 522 in Recessing element 52, recesses are provided, the one Form pressure chamber 91. Pressure chamber 91 is preferred radially symmetrical about the longitudinal axis of the transmission module 5 educated.
- a spring element 53 is located in the pressure chamber 91 arranged, preferably in the form of a spiral spring, the Drive piston 51 and the receiving element 52 in the axial direction Press apart. The spring element 53 causes the valve piston 31 even in idle state regardless of longitudinal tolerances, thermal changes in length or wear always backlash-free on both with the piezoelectric actuator 2 connected drive piston 51 as well as on the valve mushroom 32 of the servo valve 3 is present.
- a compensation chamber 92 is formed in the inner bore 11 between the transmission module 5 and the valve housing 1, delimited by the membrane 6, in addition, a compensation chamber 92 is formed. Operational is both the pressure chamber 91 in the transmission module 5 and the compensation chamber 92 around the transmission module 5 with filled with a hydraulic medium.
- the hydraulic medium is preferably the fuel for the respective engine. It is not necessary that the hydraulic Medium in the compensation chamber 92 under an increased pressure stands.
- the compensation chamber 92 can therefore, if the hydraulic Medium is the fuel, e.g. with one essentially unpressurized fuel return line from the injection valve are connected to a vehicle fuel tank.
- the Compensation chamber 92 can also be through diaphragm, sealing washers etc. be completed externally.
- the actuator shown in Fig. 1 for an injection valve with the transmission module 5 works as follows:
- the Pressure chamber 91 At rest, i.e. with the injector closed and not driven piezoelectric actuator 2, is the Pressure chamber 91 over the distance ⁇ s between the end face 513 of the plate 511 in the drive piston 51 and the stop surface 523 of the recess 522 in the receiving element 52 is formed, as well as a gap between the cylindrical Outer wall of plate 512 in drive piston 51 and the cylindrical inner wall of the recess 522 of the Receiving part 52 is formed with the compensation chamber 92nd connected so that hydraulic medium between the pressure chamber 91 and the compensation chamber 92 can be replaced. It is therefore in the idle state in the pressure chamber 91 of the same pressure as in the compensation chamber 92, preferably a depressurized state is set.
- the space between the plate 512 of the drive piston 51 and the plate 521 of the receiving element 52 is in Hibernate designed so that the deflection of the Drive piston 51 of the transmission module 5 caused Pressure increase always starts with some hydraulic medium the pressure chamber 91 presses into the compensation chamber 92. This causes the piezoelectric actuator 2 on the drive piston 51 transmitted force damped on the receiving element 52 of the transmission module 5 and thus above the valve piston 31 transferred to the valve mushroom 32 of the servo valve 3 becomes.
- valve mushroom 32 from the deflection of the Transmission module 5 with a time delay, based on the actuator control, opened because of the outflow of the hydraulic medium from the pressure chamber 91 at the beginning the actuation process of the drive piston 51 itself Rest position, in which the face 513 of his plate 512 of the stop surface 523 in the recess 522 of the receiving element 51 is spaced apart by the distance ⁇ s, deeper in the recess 512 is advanced, to the extent that is possible until the end face 513 abuts the stop face 523.
- the additional recesses are as concentric grooves 514 transverse to the direction of flow of the hydraulic Medium trained. Similar grooves can be found in the stop surface 523 of the receiving element 52 his. However, the grooves 514 are preferably in the end face 513 of the drive piston 51 is formed.
- the inventive design of the transmission module 5, a simple structure is guaranteed. They are just three simply designed parts necessary.
- the drive piston 51 which is fixed to the piezoelectric actuator 2 of the injection valve is attached, alternatively to that in Fig. 1 solution shown, the drive piston 51 also in one piece the bottom plate 24 of the actuator can be formed; the receiving element 52, which is integral with the valve piston 31 of the Servo valve 3 is formed, but also alternatively e.g. via a screw or adhesive connection with the valve piston 31 can be connected; and the spring element 53 which between the drive piston 51 and the receiving element 52 is.
- the pressure chamber 91 formed in the transmission module 5 can - as shown in Fig.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
Description
Claims (10)
- Vorrichtung zum Übertragen einer Auslenkung eines piezoelektrischen Aktors (2) auf ein Stellglied (3) mit
einem Übertragungsmodul (5), das eine Wirkverbindung zwischen dem Aktor und dem Stellglied herstellt und eine Druckkammer (91) und eine Ausgleichskammer (92) festlegt, die mit einem hydraulischen Medium mindestens teilweise gefüllt und über eine Verbindung miteinander in Kontakt stehen,
dadurch gekennzeichnet, daß
das Übertragungsmodul ein Kolbenelement (51) und ein Aufnahmeelement (52) aufweist, die teleskopartig ineinandergreifen, wobei zwischen dem Kolbenelement und dem Aufnahmeelement die Druckkammer (91) ausgebildet ist und das Kolbenelement und das Aufnahmeelement durch die Auslenkung des Aktors axial zueinander verschiebbar sind aus seiner ersten Ruhestellung, bei der die Verbindung zwischen der Druckkammer und der Ausgleichskammer (92) völlig offen ist, in eine zweite Stellung, bei der die Verbindung zwischen der Druckkammer und der Ausgleichskammer im wesentlichen unterbrochen ist. - Vorrichtung gemäß Anspruch 1, dadurch gekennzeichnet, daß zwischen dem Kolbenelement (51) und dem Ausnahmeelement (52) ein Federelement (53) angeordnet ist, das das Kolbenelement und das Aufnahmeelement in der ersten Ruhestellung hält.
- Vorrichtung gemäß Anspruch 1 oder 2, dadurch gekennzeichnet, daß das Aufnahmeelement (52) eine Vertiefung (522) aufweist, in die das Kolbenelement (51) hineinragt, wobei ein Spalt zwischen der Außenwandung des Kolbenelements und der Innenwandung der Vertiefung im Aufnahmeelement vorgesehen ist, und daß das Kolbenelement durch die Auslenkung des Aktors (2) mit einer Stirnfläche (513) auf eine Anschlagfläche (523) in der Vertiefung im Aufnahmeelement zu bewegt wird.
- Vorrichtung gemäß einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß in der Stirnfläche (513) des Kolbenelements (51) und/oder in der Anschlagfläche (523) der Vertiefung (522) im Aufnahmeelement (52) Aussparungen vorgesehen sind.
- Vorrichtung gemäß Anspruch 4, dadurch gekennzeichnet, daß diese Aussparungen als konzentrische Rillen (514) ausgebildet sind.
- Vorrichtung gemäß einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß die Druckkammer (91) durch eine Vertiefung in dem Kolbenelement (51) und/oder dem Aufnahmeelement (52) gebildet wird.
- Vorrichtung gemäß einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß das Kolbenelement (51) fest mit dem Aktor (2) verbunden ist.
- Vorrichtung gemäß einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, daß das Aufnahmeelement (52) mit einem Ventilkolben (31), der auf einen Ventilpilz (32) einwirkt, fest verbunden und einstückig damit ausgebildet ist.
- Einspritzventil zum Einspritzen von Kraftstoff in einem Verbrennungsmotor, dadurch gekennzeichnet, daß das Einspritzventil eine Vorrichtung nach einem der Ansprüche 1 bis 8 umfaßt, wobei die Vorrichtung zwischen einem piezoelektrischen Aktor (2) und einem Ventilkolben (31) eines Servoventils (3) angeordnet ist.
- Einspritzventil nach Anspruch 9, dadurch gekennzeichnet, daß das hydraulische Medium der für den Motor verwendete Kraftstoff ist.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19858476A DE19858476B4 (de) | 1998-12-17 | 1998-12-17 | Vorrichtung zum Übertragen einer Aktorauslenkung auf ein Stellglied und Einspritzventil mit einer solchen Vorrichtung |
| DE19858476 | 1998-12-17 | ||
| PCT/DE1999/003847 WO2000036293A1 (de) | 1998-12-17 | 1999-12-01 | Vorrichtung zum übertragen einer aktorauslenkung auf ein stellglied und einspritzventil mit einer solchen vorrichtung |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1144845A1 EP1144845A1 (de) | 2001-10-17 |
| EP1144845B1 true EP1144845B1 (de) | 2002-10-23 |
Family
ID=7891561
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP99962111A Expired - Lifetime EP1144845B1 (de) | 1998-12-17 | 1999-12-01 | Vorrichtung zum übertragen einer aktorauslenkung auf ein stellglied und einspritzventil mit einer solchen vorrichtung |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP1144845B1 (de) |
| DE (2) | DE19858476B4 (de) |
| WO (1) | WO2000036293A1 (de) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1325224B1 (de) | 2000-10-11 | 2006-05-03 | Siemens VDO Automotive Corporation | Druckempfindliches ventil für eine ausgleichsvorrichtung in ein piezo-elektrisches betätigungselement |
| US6991187B2 (en) | 2000-11-13 | 2006-01-31 | Siemens Automotive Corporation | Magneto-hydraulic compensator for a fuel injector |
| DE10118563A1 (de) | 2001-04-14 | 2002-11-07 | Bosch Gmbh Robert | Piezoelektrisches Aktormodul |
| US6749127B2 (en) | 2002-02-11 | 2004-06-15 | Siemens Vdo Automotive Corporation | Method of filling fluid in a thermal compensator |
| DE10344061A1 (de) * | 2003-09-23 | 2005-04-28 | Siemens Ag | Einspritzventil mit einem hydraulischen Ausgleichselement |
| DE102004046095B4 (de) * | 2004-09-23 | 2018-02-15 | Robert Bosch Gmbh | Brennstoffeinspritzventil |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3509858A (en) * | 1968-05-20 | 1970-05-05 | Gen Motors Corp | Overhead cam valve lifter |
| EP0030781B1 (de) * | 1979-12-05 | 1989-12-13 | Eaton Corporation | Hydraulischer Ventilstössel für eine direkt angetriebene Ventilsteuerung |
| DE3742241A1 (de) * | 1987-02-14 | 1988-08-25 | Daimler Benz Ag | Piezosteuerventil zur steuerung der kraftstoffeinspritzung ueber ein einspritzventil bei brennkraftmaschinen |
| US4913106A (en) * | 1989-08-28 | 1990-04-03 | Rhoads Jack L | Variable duration valve lifter improvements |
| DE19500706C2 (de) * | 1995-01-12 | 2003-09-25 | Bosch Gmbh Robert | Zumeßventil zur Dosierung von Flüssigkeiten oder Gasen |
| DE19627982A1 (de) * | 1996-07-11 | 1998-01-15 | Schaeffler Waelzlager Kg | Hydraulisches Spielausgleichselement |
| DE19708304C2 (de) * | 1997-02-28 | 1999-09-30 | Siemens Ag | Vorrichtung zur Übertragung einer Bewegung und Einspritzventil mit einer Vorrichtung zur Übertragung einer Bewegung |
-
1998
- 1998-12-17 DE DE19858476A patent/DE19858476B4/de not_active Expired - Fee Related
-
1999
- 1999-12-01 EP EP99962111A patent/EP1144845B1/de not_active Expired - Lifetime
- 1999-12-01 DE DE59903211T patent/DE59903211D1/de not_active Expired - Fee Related
- 1999-12-01 WO PCT/DE1999/003847 patent/WO2000036293A1/de not_active Ceased
Also Published As
| Publication number | Publication date |
|---|---|
| EP1144845A1 (de) | 2001-10-17 |
| DE19858476A1 (de) | 2000-06-29 |
| WO2000036293A1 (de) | 2000-06-22 |
| DE59903211D1 (de) | 2002-11-28 |
| DE19858476B4 (de) | 2006-07-27 |
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