EP2771564A1 - Dispositif à levier et injecteur - Google Patents
Dispositif à levier et injecteurInfo
- Publication number
- EP2771564A1 EP2771564A1 EP12816266.6A EP12816266A EP2771564A1 EP 2771564 A1 EP2771564 A1 EP 2771564A1 EP 12816266 A EP12816266 A EP 12816266A EP 2771564 A1 EP2771564 A1 EP 2771564A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- lever
- housing
- coupled
- injection valve
- recess
- 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.)
- Granted
Links
- 238000002347 injection Methods 0.000 title claims abstract description 39
- 239000007924 injection Substances 0.000 title claims abstract description 39
- 239000000446 fuel Substances 0.000 title abstract description 5
- 230000008878 coupling Effects 0.000 claims abstract description 40
- 238000010168 coupling process Methods 0.000 claims abstract description 40
- 238000005859 coupling reaction Methods 0.000 claims abstract description 40
- 230000009471 action Effects 0.000 claims description 12
- 239000012530 fluid Substances 0.000 claims description 6
- 230000000284 resting effect Effects 0.000 abstract 1
- 238000002485 combustion reaction Methods 0.000 description 4
- 238000005096 rolling process Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
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
- 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
- F02M63/0031—Valves characterized by the type of valves, e.g. special valve member details, valve seat details, valve housing details
- F02M63/0033—Lift valves, i.e. having a valve member that moves perpendicularly to the plane of the valve seat
-
- 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
- F02M2200/701—Linkage between actuator and actuated element, e.g. between piezoelectric actuator and needle valve or pump plunger mechanical
- F02M2200/702—Linkage between actuator and actuated element, e.g. between piezoelectric actuator and needle valve or pump plunger mechanical with actuator and actuated element moving in different directions, e.g. in opposite directions
Definitions
- the invention relates to a lever device for an injection valve, comprising a housing, at least one lever element, a drive element and an output element.
- the invention further relates to an injection valve for an internal combustion engine of a motor vehicle, which has the lever device and a valve needle which is coupled to the output element or which forms the output element.
- Injection valves for an internal combustion engine of a motor vehicle may have actuators which are designed in particular as piezoactuators. Such actuators have a piezoceramic material. Such actuators may change their longitudinal extent depending on an electric field acting in the piezoceramic material. Piezoelectric actuators, which are used as actuators, in particular in injection valves for internal combustion engines in motor vehicles, are arranged in a housing so that they can perform a lifting movement in the axial direction. The actuator may in particular be coupled to a lever device by means of which the stroke of the actuator can be translated.
- the object of the invention is to provide a lever device for an injection valve, which is permanently reliable.
- the object is also to provide an injection valve, which has a long life.
- the invention is characterized by a lever device for an injection valve, comprising a housing having a housing recess, at least one lever element which is arranged in the housing recess and has a coupling portion which is coupled to a portion of the housing Drive element which is arranged in the housing recess and is coupled to the at least one lever element for acting on the at least one lever element in the direction of a force action axis, and arranged in the housing recess output element which is coupled to the at least one lever element such that the output element of the at least one lever element is movable in the direction of the force action axis.
- the coupling portion of the lever member has at least one recess, by means of which at least two contact surfaces of the coupling portion are formed, which are spaced apart and bear against the portion of the housing.
- the lever element in a region between the contact surfaces of the coupling portion can achieve a low rigidity. It can thus be achieved that mechanical irregularities on the at least one lever element and / or on the section of the housing only slightly influence the movement of the lever element and thus changes in the injection quantities can be small or avoided. As a result, a long-term reliable operation of the lever device and thus of the injection valve can be made possible.
- the at least two contact surfaces of the coupling portion are formed as convex curved surfaces. This has the advantage that the friction and the wear of the lever element can be very small. For example, a rolling rolling of the lever element keep the load on the contact surfaces low relative to the section of the housing. This can be made possible by the at least one lever element permanently reliable operation of the lever device.
- the invention is characterized by an injection valve, which comprises the lever device and a valve needle.
- the valve needle is coupled to the output element or forms the output element.
- the drive element and the valve needle are coupled to each other via the lever device, that the valve needle in a
- FIG. 1 shows a schematic representation of an injection valve
- FIG. 3 shows a plan view of a lever element of the lever device
- FIG. 4 shows a side view of the lever element
- FIG. 5 shows a longitudinal section through the lever element
- FIG. 6 shows a further view of the lever element
- 7 shows a longitudinal section through the lever element and a portion of a housing of the injection valve
- Figure 8 is a longitudinal section through the lever member and the portion of the housing
- FIG. 9 shows a further plan view of the lever element.
- FIG. 1 shows a valve, in particular an injection valve 10 for an internal combustion engine in a motor vehicle.
- the injection valve 10 has a housing 12.
- the housing 12 has a plurality of sections 12a, 12b.
- the housing 12 has, in particular, a disc-shaped section 12 a, which is arranged between two tubular sections 12 b of the housing 12.
- the disc-shaped portion 12 a and the two tubular portions 12 b are fixedly coupled together and together form the housing 12.
- a housing recess 14 with a fluid inlet 16 and a fluid outlet 18 is formed. Via a connection, not shown, which is hydraulically coupled to the housing recess 14, fuel can be supplied to the injection valve 10 in the region of the fluid inlet 16.
- a valve needle 20 is arranged axially movable, which closes an injection nozzle 22 in a closed position and otherwise allows fuel flow through the injection nozzle 22.
- the injection valve 10 includes a piezoelectric actuator 24.
- the piezoelectric actuator 24 may also be be provided other actuator, such as a magnetostrictive actuator or an electromagnetic actuator.
- the injector 10 further includes a drive element 26 coupled to the actuator 24.
- the drive element 26 preferably includes a pin or rod that transmits the stroke and a drive force of the actuator 24.
- the actuator 24 and the drive element 26 are coupled together in the axial direction.
- a stroke of the drive element 26 is dependent on an axial extent of the piezoelectric actuator 24, which depends on a
- Control signal is that can be supplied to the piezoelectric actuator 24.
- the drive element 26 further comprises a preferably bell-shaped component 27.
- a lever device 28 is further arranged.
- the lever device 28 comprises the drive element 26 and a lever element 30 or a plurality of lever elements 30.
- the lever device 28 has two lever elements 30 (see also FIG. 2).
- the lever elements 30 are coupled to the drive element 26. Further, the lever members 30 with a
- Output element 32 coupled.
- the output element 32 is arranged in the housing recess 14.
- the output element 32 is preferably coupled to the valve needle 20.
- the valve needle 20 may also form the output element 32.
- the drive member 26, the lever member 30 and the output member 32 cooperate such that the stroke of the drive member 26 is transmitted to the valve needle 20 and that the valve needle 20 is thus moved to its closed position or to an open position.
- a force action axis A of a drive force of the drive member 26 passes through the drive member 26 and as a force action axis of a driven force further through the Output element 32.
- the force action axis is offset by the drive element 26 to the force action axis by the output element 32.
- Figure 2 shows an embodiment of the lever device 28 in a cross section.
- the lever elements 30 each have a coupling region 134. In the embodiment shown in FIG.
- Output element 32 two planar wall sections 136.
- the planar wall sections 136 are opposite to each other with respect to the force action axis A of the output element 32.
- the coupling regions 134 of the lever elements 30 each have a planar wall section 138.
- the planar wall sections 138 of the lever elements 30 are assigned to the planar wall sections 136 of the output element 32.
- one of the planar wall sections 138 of the lever element 30 is opposite to a planar wall section 136 of the output element 32.
- the planar wall portions 136 of the output member 32 cooperate with the planar wall portions 138 of the lever member 30, and thus allow the lever members 30 with the
- Output element 32 rotatably with respect to the force axis A are coupled. It can thus be achieved that the lever elements 30 can no longer rotate with respect to the valve needle 20. Thus, the conditions in the injection of the injection valve 10 can be kept constant over many injection events.
- the coupling regions 134 of the lever elements 30 have planar wall sections 138.
- the housing recess 14 of the housing 12 has two planar wall sections 140, which lie opposite one another with respect to the force action axis A.
- one of the planar wall sections 138 of one of the lever elements 30 acts with one of plan wall portions 140 of the housing recess 14 together. It can thereby be achieved that the lever element 30 is coupled to the housing 12 in a rotationally fixed manner with respect to the force action axis A.
- the rotationally fixed coupling of the lever members 30 to the housing 12 it is possible that the contact conditions between the lever members 30 and the housing 12 can be kept constant over a long period of time.
- the injection behavior of the injection valve 10 can be kept constant over a long period of time.
- FIGS. 3 to 6 show an embodiment of the lever element 30 in various views.
- the lever member 30 has a coupling portion 34.
- the coupling portion 34 is coupled to the disk-shaped portion 12a of the housing 12 (see also Fig. 1).
- the coupling portion 34 has a recess 36.
- the recess 36 is formed such that on the coupling portion 34, two contact surfaces 38 are formed, which are spaced apart.
- the two contact surfaces 38 of the coupling portion 34 abut against a contact surface 40 of the disk-shaped portion 12 a of the housing 12.
- the contact surface 40 of the disk-shaped portion 12a of the housing 12 has a surface normal which is parallel to the force action axis A.
- the two contact surfaces 38 of the coupling section 34 are designed as convexly curved surfaces. It can thus be achieved that the lever element 30 can roll over the disk-shaped section 12a of the housing 12 in a rolling manner.
- the mode of operation of the lever element 30 with the recess 36 of the coupling section 34 will be explained with reference to FIGS. 7 and 8:
- the disk-shaped section 12a of the housing 12 has an elevation 44 which lies between the contact surfaces 38 of the coupling section 34 in the region the recess 36 of the coupling portion 34 is located.
- the lever element 30 can be supported without influencing by the elevation 44 with respect to the disk-shaped portion 12a of the housing 12.
- a movement of the lever member 30 relative to the disk-shaped portion 12a of the housing 12 via the contact surfaces 38 of the coupling portion 34 and the contact surface 40 can be done so undisturbed by the survey 44.
- the disc-shaped section 12a of the housing 12 has a further elevation 44a, which lies in the region of one of the contact surfaces 38 of the coupling section 34. Due to the formation of the recess 36 of the coupling portion 34, the lever member 30 in the region of the recess 36 has a low rigidity. It can thereby be achieved that upon movement of the lever element 30 relative to the disk-shaped section 12a of the housing 12, the lever element 30 can yield in the region of the recess 36. It can thereby be achieved that the further elevation 44a has only a slight influence on the movement of the lever element 30 and thus the movement of the output element 32.
- the lever element 30 has further coupling sections 42a, 42b (FIG. 9).
- One of the further coupling sections 42a is coupled to the output element 32.
- Another of the further coupling sections 42b is coupled to the bell-shaped component 27 of the drive element 26 (see FIG. 1).
- the further coupling section 42a which is coupled to the output element 32, is arranged opposite the further coupling section 42b, which is coupled to the drive element 26, such that the greatest possible distance between the further coupling sections 42a, 42b on the lever element 30 is reached.
- the lever element 30 can have a lower rigidity in the area between the further coupling sections 42a, 42b than in the region of the further coupling sections 42a, 42b.
- the lever elements 30 can also interact with the disk-shaped section 12a of the housing 12 via a multiplicity of injection processes without changing the transmission behavior between the lever elements 30 and 30 the disc-shaped portion 12a of the housing 12 changed significantly.
- stable injection conditions of the injection valve 10 can be achieved via a multiplicity of injection processes of the injection valve 10. It can thereby be achieved that component tolerances, in particular of the lever element 30 and / or the disk-shaped portion 12a of the housing 12, such as by the elevations 44, 44a only to a small extent or not at all affect the injection quantities of the injection valve 10.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102011090200A DE102011090200A1 (de) | 2011-12-30 | 2011-12-30 | Hebelvorrichtung und Einspritzventil |
PCT/EP2012/076158 WO2013098155A1 (fr) | 2011-12-30 | 2012-12-19 | Dispositif à levier et injecteur |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2771564A1 true EP2771564A1 (fr) | 2014-09-03 |
EP2771564B1 EP2771564B1 (fr) | 2015-10-14 |
Family
ID=47563354
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP12816266.6A Active EP2771564B1 (fr) | 2011-12-30 | 2012-12-19 | Dispositif à levier et injecteur |
Country Status (4)
Country | Link |
---|---|
US (1) | US9376993B2 (fr) |
EP (1) | EP2771564B1 (fr) |
DE (1) | DE102011090200A1 (fr) |
WO (1) | WO2013098155A1 (fr) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102011090196A1 (de) | 2011-12-30 | 2013-07-04 | Continental Automotive Gmbh | Hebelvorrichtung und Einspritzventil |
DE102011090200A1 (de) | 2011-12-30 | 2013-07-04 | Continental Automotive Gmbh | Hebelvorrichtung und Einspritzventil |
JP6443109B2 (ja) | 2015-02-17 | 2018-12-26 | 株式会社Soken | 燃料噴射弁 |
Family Cites Families (25)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1470525A (en) * | 1973-08-29 | 1977-04-14 | Girling Ltd | Abutment assemblies for internal shoe drum brakes |
DE3311690C2 (de) * | 1983-03-30 | 1985-05-30 | Heilmeier & Weinlein Fabrik für Oel-Hydraulik GmbH & Co KG, 8000 München | Elektromagnetisch betätigbares Ventil |
US5121730A (en) * | 1991-10-11 | 1992-06-16 | Caterpillar Inc. | Methods of conditioning fluid in an electronically-controlled unit injector for starting |
US6607178B1 (en) * | 1997-09-29 | 2003-08-19 | Siemens Aktiengesellschaft | Thrust device, fuel injection valve having such a device, and method for manufacturing a thrust transfer element |
DE19757659C1 (de) * | 1997-12-23 | 1999-06-17 | Siemens Ag | Einspritzventil mit einer Ausgleichsfläche |
DE19857615C1 (de) * | 1998-12-14 | 2000-07-13 | Siemens Ag | Hebelübersetzer |
DE19921242C1 (de) * | 1999-05-07 | 2000-10-26 | Siemens Ag | Verfahren zum Positionieren des Stellantriebs in einem Kraftstoffinjektor und Vorrichtung zur Durchführung des Verfahrens |
DE10002720A1 (de) * | 1999-08-20 | 2001-03-29 | Bosch Gmbh Robert | Ventil zum Steuern von Flüssigkeiten |
JP2003507679A (ja) * | 1999-08-20 | 2003-02-25 | ローベルト ボツシユ ゲゼルシヤフト ミツト ベシユレンクテル ハフツング | 液体を制御するための弁 |
DE10101799A1 (de) | 2001-01-17 | 2002-07-18 | Bosch Gmbh Robert | Ventil zum Steuern von Flüssigkeiten |
WO2002086982A1 (fr) * | 2001-04-20 | 2002-10-31 | Siemens Aktiengesellschaft | Dispositif pour transmettre la deviation d'un actionneur, et son procede de production |
US6595436B2 (en) * | 2001-05-08 | 2003-07-22 | Cummins Engine Company, Inc. | Proportional needle control injector |
DE10304240A1 (de) * | 2003-02-03 | 2004-10-28 | Volkswagen Mechatronic Gmbh & Co. Kg | Vorrichtung zum Übertragen einer Auslenkung eines Aktors |
DE10308613A1 (de) | 2003-02-27 | 2004-09-16 | Siemens Ag | Ventil mit einem Hebel, Hebel und Verfahren zur Herstellung eines Hebels |
DE10326707B3 (de) * | 2003-06-11 | 2005-01-27 | Westport Germany Gmbh | Ventilvorrichtung und Verfahren zum Einblasen von gasförmigem Kraftstoff |
DE102005020366A1 (de) * | 2005-05-02 | 2006-11-09 | Robert Bosch Gmbh | Kraftstoffeinspritzdüse mit Bewegungsumkehr für einen piezoelektrischen Aktor |
DE102005024707A1 (de) * | 2005-05-30 | 2006-12-07 | Robert Bosch Gmbh | Kraftstoffeinspritzdüse |
DE102006017034B4 (de) | 2006-04-11 | 2008-01-24 | Siemens Ag | Piezo-Aktor, Verfahren zum Herstellen eines Piezo-Aktors und Einspritzsystem mit einem solchen |
DE102006031567A1 (de) * | 2006-07-07 | 2008-01-10 | Siemens Ag | Einspritzsystem und Verfahren zum Herstellen eines Einspritzsystems |
DE102009018289B3 (de) * | 2009-04-21 | 2010-06-17 | Continental Automotive Gmbh | Verfahren und Vorrichtung zum Betreiben eines Einspritzventils |
DE102010044285B4 (de) * | 2010-09-03 | 2014-02-27 | Continental Automotive Gmbh | Verfahren und Vorrichtung zum Einstellen eines Leerhubs eines Stellantriebs eines Einspritzventils und Injektorbaugruppe |
DE102011075732B4 (de) * | 2011-05-12 | 2021-02-11 | Vitesco Technologies GmbH | Regelverfahren für ein Einspritzventil und Einspritzsystem |
US8844842B2 (en) * | 2011-08-12 | 2014-09-30 | Caterpillar Inc. | Three-way needle control valve and dual fuel injection system using same |
DE102011090196A1 (de) | 2011-12-30 | 2013-07-04 | Continental Automotive Gmbh | Hebelvorrichtung und Einspritzventil |
DE102011090200A1 (de) | 2011-12-30 | 2013-07-04 | Continental Automotive Gmbh | Hebelvorrichtung und Einspritzventil |
-
2011
- 2011-12-30 DE DE102011090200A patent/DE102011090200A1/de not_active Ceased
-
2012
- 2012-12-19 WO PCT/EP2012/076158 patent/WO2013098155A1/fr active Application Filing
- 2012-12-19 EP EP12816266.6A patent/EP2771564B1/fr active Active
- 2012-12-19 US US14/369,837 patent/US9376993B2/en active Active
Non-Patent Citations (1)
Title |
---|
See references of WO2013098155A1 * |
Also Published As
Publication number | Publication date |
---|---|
US20150021418A1 (en) | 2015-01-22 |
EP2771564B1 (fr) | 2015-10-14 |
WO2013098155A1 (fr) | 2013-07-04 |
DE102011090200A1 (de) | 2013-07-04 |
US9376993B2 (en) | 2016-06-28 |
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Inventor name: WECHLER, WOLFGANG Inventor name: HANNICH, MANUEL Inventor name: KOHN, STEFAN Inventor name: WICKE, MATTHIAS Inventor name: FEIGL, ROLAND Inventor name: FREUDENBERG, HELLMUT Inventor name: KUCHLER, ROBERT Inventor name: LEHMANN, STEFAN |
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