EP2075857B1 - Aktuatoranordnung und Einspritzventil - Google Patents
Aktuatoranordnung und Einspritzventil Download PDFInfo
- Publication number
- EP2075857B1 EP2075857B1 EP20070025217 EP07025217A EP2075857B1 EP 2075857 B1 EP2075857 B1 EP 2075857B1 EP 20070025217 EP20070025217 EP 20070025217 EP 07025217 A EP07025217 A EP 07025217A EP 2075857 B1 EP2075857 B1 EP 2075857B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- solid state
- state actuator
- unit
- actuator unit
- damping 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.)
- Active
Links
- 238000002347 injection Methods 0.000 title claims description 23
- 239000007924 injection Substances 0.000 title claims description 23
- 239000007787 solid Substances 0.000 claims description 83
- 238000013016 damping Methods 0.000 claims description 41
- 230000036316 preload Effects 0.000 claims description 9
- 239000004033 plastic Substances 0.000 claims description 5
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 3
- 229910052710 silicon Inorganic materials 0.000 claims description 3
- 239000010703 silicon Substances 0.000 claims description 3
- 239000012530 fluid Substances 0.000 description 17
- 239000000446 fuel Substances 0.000 description 6
- 238000002485 combustion reaction Methods 0.000 description 5
- 238000003466 welding Methods 0.000 description 5
- 239000004020 conductor Substances 0.000 description 4
- 230000008901 benefit Effects 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000004323 axial length Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000004044 response 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
- 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
-
- 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
- F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
- F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
- F02M61/167—Means for compensating clearance or thermal expansion
-
- 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
- F02M2200/30—Fuel-injection apparatus having mechanical parts, the movement of which is damped
- F02M2200/306—Fuel-injection apparatus having mechanical parts, the movement of which is damped using mechanical means
-
- 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
Definitions
- the invention relates to an actuator arrangement and injection valve.
- Actuator arrangements are in wide spread use, in particular injection valves for instance for internal combustion engines comprise actuator arrangements, which comprise solid state actuator units.
- the solid state actuator unit is energized so that a fluid flow through the fluid outlet portion of the injection valve is enabled, as disclosed in EP 1 741 922 A1 .
- the respective injection valve may be suited to dose fluids under very high pressures.
- the pressures may be in case of a gasoline engine, for example in a range of up to 200 bar or in the case of diesel engines in a range of up to 2,000 bar.
- electric energy needs to be transmitted to or from the actuator arrangement in a very fast way.
- the object of the invention is to create an actuator arrangement that is simply to be manufactured and which enables reliable operation.
- the invention is distinguished by an actuator arrangement, comprising a solid state actuator unit with a longitudinal axis comprising electric pins being electrically coupable to a power supply and a piston, wherein the solid state actuator unit comprises a first axial end area designed to act as drive side and a second axial end area facing away from the first axial end area, a compensator unit being arranged facing the second axial end area of the solid state actuator unit along the longitudinal axis of the solid state actuator unit and being in contact with the solid state actuator unit via the piston, and a damping element being designed and arranged in-between the compensator unit and the solid state actuator unit facing the second axial end area of the solid state actuator unit, the damping element being preloaded by the compensator unit and the solid state actuator unit.
- the damping element is preloaded with an axial preload force in the range of 10 N.
- the damping element comprises a silicon base. This has the advantage that the damping of the actuator arrangement is especially reliable.
- the damping element comprises a plastic.
- the damping element comprises rubber.
- the invention is distinguished by an injection valve with a valve assembly within a recess of a housing body and an actuator arrangement of the first aspect of the invention, comprising a solid state actuator unit within the recess, wherein the solid state actuator unit is being designed for acting on the valve assembly.
- Figure 1 shows an actuator arrangement 10 comprising a solid state actuator unit 12, a compensator unit 14 and a damping element 16.
- the solid state actuator unit 12 has a longitudinal axis A and comprises a piston 18 and electric pins 20 being electrically coupable to a power supply.
- the electric pins 20 might be coupled by weldings, in particular resistance weldings, or soldered connections to an electric conductor 66 ( figure 2 ), which is supplied with electric energy.
- injection valves for instance for internal combustion engines may comprise the actuator arrangement 10.
- the solid state actuator unit 12 comprises a solid state actuator 22.
- the solid state actuator 22 changes its length in axial direction depending on a control signal applied to it such as electric energy supplied to it.
- the solid state actuator unit 12 is typically a piezo actuator unit. It may however also be any other solid state actuator unit known to the person skilled in the art such as a magnetostrictive actuator unit.
- the solid state actuator unit 12 comprises a first axial end area 24 designed to act as drive side and a second axial end area 26, which is facing away from the first axial end area 24, in particular facing the damping element 16.
- actuating elements are arranged such as a valve needle or a rotor.
- the compensator unit 14 is arranged facing the second axial end area 26 of the solid state actuator unit 12 along the longitudinal axis A of the solid state actuator unit 12 and is mechanically coupled to the piston 18 of the solid state actuator unit 12.
- the compensator unit 14 enables to set an axial preload force on the solid state actuator unit 12 via the piston 18 of the solid state actuator unit 12.
- the compensator unit 14 is a thermal compensator unit, which is enabled to compensate temperature changes.
- the damping element 16 is arranged in-between the compensator unit 14 and the solid state actuator unit 12 facing the second axial end area 26 of the solid state actuator unit 12.
- the damping element 16 is preloaded by the compensator unit 14 and the solid state actuator unit 12.
- the damping element 16 is preloaded with an axial preload force in the range of 10 N.
- the electric pins 20 of the solid state actuator unit 12 can be arranged in optional direction, for instance in axial direction of the solid state actuator unit 12 or perpendicular to it.
- the electric pins 20 protrude in the damping element 16.
- the piston 18 of the solid state actuator unit 12 protrudes in the damping element 16.
- the energizing of the solid state actuator unit 12 may cause undesired movements and vibrations within the actuator arrangement 10, which for example might stress weldings.
- the damping element 16 which is mechanically coupled to the solid state actuator unit 12, undesired movements of the solid state actuator unit 12 can be prevented and vibrations within the second axial end area 24 of the actuator arrangement 10 can be limited.
- electric connections and resistance weldings between the electric pins 20 of the solid state actuator unit 12 and the power supply can be protected against undesired movements and vibrations.
- the damping element 16 may comprise for example a silicon base or a plastic such as rubber. Therefore, some kind of elasticity for damping may be provided. And by this, the damping element 16 is simply to be manufactured.
- FIG. 2 shows an injection valve 28 that may be used as a fuel injection valve for an internal combustion engine.
- the injection valve 28 comprises a valve assembly 30, the actuator arrangement 10 and a connector 32.
- the actuator arrangement 10 comprises the solid state actuator unit 12.
- the injection valve 28 has a two-part housing body 34, 36 with a tubular shape with the central longitudinal axis A.
- the housing body 34, 36 of the injection valve 28 comprises a recess 38 which is axially led through the housing body 34, 36.
- the solid state actuator unit 12 is arranged within the recess 38 of the housing body 34, 36 and comprises the electric pins 20 being electrically coupable to a power supply.
- An actuator housing enclosing the solid state actuator 22 of the solid state actuator unit 12 may comprise a spring tube 40, a top cap 42 and a bottom cap 44. Part of the top cap 42 may form at least part of the second axial end area 26. Part of the bottom cap 44 may form at least part of the first axial end area 24 comprising the drive side of the solid state actuator unit 12.
- the solid state actuator unit 12 further comprises the piston 18, which is coupled to the top cap 42 or may in one piece form part of the top cap 42. It may apply an axial preload force on the solid state actuator unit 12.
- the valve assembly 30 comprises a valve body 46 and a valve needle 48.
- the valve body 46 has a valve body spring rest 50 and the valve needle 48 comprises a valve needle spring rest 52, both spring rests 50, 52 supporting a spring 54 arranged between the valve body 46 and the valve needle 48.
- a bellow 56 is arranged, which is sealingly coupling the valve body 46 with the valve needle 48. By this a fluid flow between the recess 38 and a chamber 58 is prevented.
- the bellow 56 is formed and arranged in a way that the valve needle 48 is actuable by the solid state actuator unit 12.
- a fluid outlet portion 60 is closed or open depending on the axial position of a valve needle 48.
- the solid state actuator 22 can exert a force to the valve needle 48.
- the force from the solid state actuator 22 being exerted to the valve needle 48 in an axial direction allows or prevents a fluid flow through the fluid outlet portion 60.
- the injection valve 28 has a fluid inlet portion 62, which is arranged in the housing body 34, 36 and which for instance is coupled to a not shown fuel connector.
- the fuel connector is designed to be connected to a high pressure fuel chamber of an internal combustion engine, the fuel is stored under high pressure, for example, under the pressure above 200 bar.
- the valve assembly 30 is arranged in the injection valve 28 facing the first axial end area 24 on the drive side of the solid state actuator unit 12 in a part of the recess 38 of the housing body 34 of the injection valve 28 along the longitudinal axis A.
- the compensator unit 14 which is in this example a thermal compensator unit, is arranged facing the second axial end area 26 of the solid state actuator unit 12 and facing the damping element 16 and is mechanically coupled to the piston 18 of the solid state actuator unit 12.
- the compensator unit 14 enables to set an axial preload force on the solid state actuator unit 12 via the piston 18 to compensate changes of the fluid flow through the fluid outlet portion 60 in the case of temperature changes of the injection valve 28.
- the injection valve 28 further comprises the connector 32 with a non-conductive connector body 64 in which an electric conductor 66 is arranged. Electric energy can be supplied to the electric conductor 66 of the connector 32.
- the solid state actuator unit 12 comprises an adapter 68 consisting of terminal elements 70. The electric conductor 66 of the connector 32 is electrically coupled to one of the terminal elements 70 of the adapter 68 which is electrically coupled to another of the terminal elements 70 which on its part is electrically coupled to the electric pins 20 of the solid state actuator 22. Consequently, electric energy can be simply supplied to the solid state actuator 22 via the connector 32.
- the damping element 16 is arranged in-between the solid state actuator unit 12 and the compensator unit 14, wherein the damping element 16 may be conterminous to a spring rest of the compensator unit 14.
- the damping element 16 may be designed not to be conterminous to the housing body 36 of the injection valve 28.
- the damping element 16 is arranged in-between the solid state actuator unit 12 and the compensator unit 14 without being in contact with further parts of the injection valve 28. In this case, especially reliable damping of undesired movements of the solid state actuator unit 12 and vibrations within the second axial end area 26 of the actuator arrangement 10 is accomplished.
- the damping element 16 may be pre-arranged in-between the compensator unit 14 and the solid state actuator unit 12 to enable the correct arrangement.
- the damping element 16 is preloaded by the compensator unit 14 and the solid state actuator unit 12 to provide an axial preload force. By this, especially reliable damping of undesired movements of the solid state actuator unit 12 and vibrations within the second axial end area 26 of the actuator arrangement 10 can be accomplished.
- the damping element 16 is preloaded with an axial preload force in the range of 10 N.
- the valve needle 48 prevents a fluid flow through the fluid outlet portion 60 in the valve body 46 in a closing position of the valve needle 48. Outside of the closing position of the valve needle 48, the valve needle 48 enables the fluid flow through the fluid outlet portion 60.
- the solid state actuator 22 may change its axial length if it is energized. By changing its length the solid state actuator 22 may exert a force on the valve needle 48.
- the valve needle 48 is able to move in axial direction out of the closing position. Outside the closing position of the valve needle 48 there is a gap between the valve body 46 and the valve needle 48 at the first axial end area 24 of the injection valve 28 facing away from the solid state actuator 22.
- the spring 54 can force the valve needle 48 via the valve needle spring rest 52 towards the solid state actuator 22. In the case the solid state actuator 22 is de-energized, the solid state actuator 22 shortens its length.
- the spring 54 can force the valve needle 48 to move in axial direction in its closing position. It is depending on the force balance between the force on the valve needle 48 caused by the solid state actuator 22 and the force on the valve needle 48 caused by the spring 54 whether the valve needle 48 is in its closing position or not.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fuel-Injection Apparatus (AREA)
Claims (6)
- Aktuatoranordnung (10), umfassend- eine Festkörper-Aktuatoreinheit (12) mit einer Längsachse (A), umfassend elektrische Stifte (20), die elektrisch an eine Stromversorgung gekoppelt werden können, wobei die Festkörper-Aktuatoreinheit (12) einen ersten axialen Endbereich (24) umfasst, der ausgestaltet ist, als Antriebsseite zu wirken, und einen zweiten axialen Endbereich (26), der von dem ersten axialen Endbereich (24) abgewandt ist,- eine Kompensatoreinheit (14), die so angeordnet ist, dass sie dem zweiten axialen Endbereich (26) der Festkörper-Aktuatoreinheit (12) entlang der Längsachse (A) der Festkörper-Aktuatoreinheit (12) zugewandt ist, dadurch gekennzeichnet, dass die Kompensatoreinheit (14) über einen Kolben (18) in Kontakt mit der Festkörper-Aktuatoreinheit (12) steht, und- ein Dämpfungselement (16), das zwischen der Kompensatoreinheit (14) und der Festkörper-Aktuatoreinheit (12) ausgestaltet und angeordnet ist, das dem zweiten axialen Endbereich (26) der Festkörper-Aktuatoreinheit (12) zugewandt ist, wobei das Dämpfungselement (16) durch die Festkörper-Aktuatoreinheit (12) und die Kompensatoreinheit (14) vorgespannt ist.
- Aktuatoranordnung (10) nach Anspruch 1, wobei das Dämpfungselement (16) mit einer axialen Vorspannungskraft im Bereich von 10 Newton vorgespannt ist.
- Aktuatoranordnung (10) nach einem der vorhergehenden Ansprüche, wobei das Dämpfungselement (16) eine Siliziumbasis umfasst.
- Aktuatoranordnung (10) nach einem der vorhergehenden Ansprüche, wobei das Dämpfungselement (16) einen Kunststoff umfasst.
- Aktuatoranordnung (10) nach Anspruch 4, wobei der Kunststoff Gummi ist.
- Einspritzventil (28) mit einer Ventilbaugruppe (30) innerhalb einer Aussparung (38) eines Gehäusekörpers (34, 36) und eine Aktuatoranordnung (10) nach einem der vorhergehenden Ansprüche, umfassend eine Festkörper-Aktuatoreinheit (12) innerhalb der Aussparung (38), wobei die Festkörper-Aktuatoreinheit (12) ausgestaltet ist, auf die Ventilbaugruppe (30) zu wirken.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP20070025217 EP2075857B1 (de) | 2007-12-28 | 2007-12-28 | Aktuatoranordnung und Einspritzventil |
DE200760013435 DE602007013435D1 (de) | 2007-12-28 | 2007-12-28 | Aktuatoranordnung und Einspritzventil |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP20070025217 EP2075857B1 (de) | 2007-12-28 | 2007-12-28 | Aktuatoranordnung und Einspritzventil |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2075857A1 EP2075857A1 (de) | 2009-07-01 |
EP2075857B1 true EP2075857B1 (de) | 2011-03-23 |
Family
ID=39402700
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP20070025217 Active EP2075857B1 (de) | 2007-12-28 | 2007-12-28 | Aktuatoranordnung und Einspritzventil |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP2075857B1 (de) |
DE (1) | DE602007013435D1 (de) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102748179B (zh) * | 2012-08-01 | 2016-03-09 | 袁辉 | 喷油器 |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2002031349A1 (en) * | 2000-10-11 | 2002-04-18 | Siemens Vdo Automotive Corporation | Compensator assembly having a pressure responsive valve for a solid state actuator of a fuel injector |
DE10057495B4 (de) * | 2000-11-20 | 2005-08-04 | Siemens Ag | Injektorgehäuse mit einer Aktoreinheit |
DE102004050224A1 (de) * | 2004-10-15 | 2006-04-20 | Robert Bosch Gmbh | Aktormodul |
DE102005029976A1 (de) * | 2005-06-28 | 2007-01-11 | Robert Bosch Gmbh | Brennstoffeinspritzventil |
-
2007
- 2007-12-28 DE DE200760013435 patent/DE602007013435D1/de active Active
- 2007-12-28 EP EP20070025217 patent/EP2075857B1/de active Active
Also Published As
Publication number | Publication date |
---|---|
EP2075857A1 (de) | 2009-07-01 |
DE602007013435D1 (de) | 2011-05-05 |
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