EP2898212B1 - Soupape d'injection de carburant - Google Patents

Soupape d'injection de carburant Download PDF

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Publication number
EP2898212B1
EP2898212B1 EP13739736.0A EP13739736A EP2898212B1 EP 2898212 B1 EP2898212 B1 EP 2898212B1 EP 13739736 A EP13739736 A EP 13739736A EP 2898212 B1 EP2898212 B1 EP 2898212B1
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EP
European Patent Office
Prior art keywords
actuator
stroke
nozzle needle
compensation device
nozzle
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
Application number
EP13739736.0A
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German (de)
English (en)
Other versions
EP2898212A1 (fr
Inventor
Hans-Christoph Magel
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP2898212A1 publication Critical patent/EP2898212A1/fr
Application granted granted Critical
Publication of EP2898212B1 publication Critical patent/EP2898212B1/fr
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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
    • 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 fuel injection valve, in particular an injector for fuel injection systems of air-compressing, self-igniting internal combustion engines. Specifically, the invention relates to the field of fuel injector injectors having a fuel rail that stores high pressure fuel and distributes it to a plurality of fuel injectors.
  • an injector with a directly driven register nozzle needle for fuel injection into an internal combustion engine is known.
  • the register nozzle needle is arranged in an axial bore of a nozzle body. In the non-activated state, the register nozzle needle closes spray holes of the nozzle body by means of a pressure spring.
  • a piezoelectric actuator arranged above the register nozzle needle is directly mechanically coupled to the register nozzle needle.
  • a deflection device with levers which are supported against the nozzle body is provided. The levers are actuated by a sleeve which is connected to the movable end of the actuator. In addition, the levers press from below against a colored plate of the register nozzle needle.
  • the from the DE 102 54 186 A1 known injector has the disadvantage that it comes due to temperature changes occurring during operation to length changes of the individual components, which do not compensate. This concerns, for example, a steel housing and a piezoelectric actuator. Furthermore, there is the disadvantage that production-related tolerances adversely affect the function, which leads to increased production costs.
  • a fuel injector with a longitudinally displaceably arranged in a housing valve needle known which closes in a closed position at least one arranged in a high-pressure chamber of the housing injection hole and in an open position releases the at least one injection hole for dispensing fuel into a combustion chamber of an internal combustion engine.
  • the valve needle is subjected to force by means of at least one compression spring in the direction of its closed position, wherein an actuator for actuating the valve needle is provided, which is connected to the valve needle via a mechanically acting coupling device.
  • the valve needle is formed in the closed position as at least almost force-balanced valve needle.
  • the actuator is designed as a magnetic actuator.
  • the magnetic actuator acts directly on the mechanically acting coupler.
  • the mechanically acting coupler includes rocker arms, one end portions of which are disposed in abutting engagement with a bottom surface of a coupler sleeve, while the other end portions of the rocker arms cooperate with the underside of the end portion of the valve needle.
  • a fuel injection valve in particular an injector for fuel injection systems of air-compressing, self-igniting internal combustion engines, in which an actuator, a nozzle needle and a mechanical translator are provided, wherein the mechanical translator translates a stroke of the actuator into a stroke of the nozzle needle, wherein a hydraulic Temperature compensation device provided and wherein, when translating the stroke of the actuator into the stroke of the nozzle needle, the actuator acts via the hydraulic temperature compensation device on the mechanical translator.
  • the hydraulic temperature compensation device is formed in the high pressure region and arranged between the actuator and the mechanical translator. As a result, the entire actuator force must be transmitted through the hydraulic temperature compensation device.
  • the from the DE102005020366 known fuel injector shows that by means of a lever mechanism of the booster piston and thus also the nozzle needle are coupled in the opposite direction with the piezoelectric actuator. Via a coupling space filled with fuel, the nozzle needle is hydraulically coupled with the booster piston.
  • the fuel injection valve according to the invention with the features of claim 1 has the advantage that an improved design is possible. Specifically, a temperature and / or tolerance compensation can be realized in an improved manner.
  • the hydraulic compensation device is arranged between the mechanical translator and the nozzle needle.
  • the preferably already reduced by the translation actuator power must be transmitted.
  • an advantageous ratio of, for example, two to five the transmission losses and the gap losses compared to a configuration in which the entire actuator force must be transmitted through the hydraulic device, thereby significantly reduced.
  • the compensation device between the mechanical translator and the nozzle needle is located.
  • the mechanical translator has at least one lever element
  • the compensation device has a base body, wherein when the stroke of the actuator is translated into the stroke of the nozzle needle, the at least one lever element acts on the base body.
  • the base body of the compensating device on a transmission part and a plate-shaped lifting part, acts on the at least one lever element when translating the stroke of the actuator in the stroke of the nozzle needle.
  • a stationary arranged to a housing plate is provided, wherein the transmission part of the compensation device extends through the plate.
  • the plate can create a certain spatial separation between a fuel space in which the mechanical translator is arranged and a fuel space in which the compensation device and, if appropriate, the nozzle needle are arranged.
  • the plate has a guide bore, in which the transmission part of the compensation device is axially guided.
  • the plate it is also possible for the plate to have a passage opening through which the transmission part extends with radial play. As a result, a guide on the plate can be avoided. As a result, an overdetermination can be avoided in particular.
  • a sealing sleeve is provided, which is acted upon by a spring element against a nozzle distal end of the nozzle needle side facing the plate, that within the sealing sleeve a compensation chamber of the compensation device is formed and that the nozzle-distal end of the nozzle needle and the nozzle distant End of the nozzle needle facing end face of the transmission part limit the expansion chamber.
  • a compensation chamber of the compensation device is formed and that the nozzle-distal end of the nozzle needle and the nozzle distant End of the nozzle needle facing end face of the transmission part limit the expansion chamber.
  • the mechanical translator has an actuating part, by means of which the actuator actuates the at least one lever element when translating the stroke of the actuator into the stroke of the nozzle needle, and that a prestressed rest position spring element is provided, on the one hand the actuating part of the mechanical translator and on the other hand supported on the lifting part of the base body of the compensating device.
  • the prestressed rest position spring element causes a play-free rest position of the transmission components, in particular of the actuating part of the mechanical translator, the at least one lever element of the mechanical translator and the base body of the compensating device.
  • the mechanical translator allows a fixed or variable stroke ratio of the stroke of the actuator in an x-fold stroke of the nozzle needle, wherein x is greater than one or not less than two or from a range of about two to about five.
  • x is greater than one or not less than two or from a range of about two to about five.
  • a force acting on the mechanical translator with respect to the force of the actuator can thus be reduced.
  • Loss of actuator force due to an optionally limited hydraulic stiffness of the hydraulic Compensation device can thus be reduced.
  • clearance losses in the hydraulic balancer that require refilling may be reduced due to reduced forces relative to the force of the actuator.
  • the preferred stroke ratio which can be in particular in the range of about two to about five, the transmission losses and the gap losses of the hydraulic balancer can be significantly reduced.
  • a body component which separates an actuator space in which the actuator is arranged from a fuel space in which the mechanical translator is arranged, that the body component has a through hole in which a transmission pin is guided, and that the actuator acts by means of the transmission pin on an actuating part of the mechanical translator.
  • a high-pressure-tight guide of the transmission pin can be provided in the body component, so that the actuator lies in the low-pressure region.
  • the actuator can be suitably protected against the fuel.
  • the actuator can be designed as a wet actuator in the low-pressure region or as a dry actuator by means of a corresponding seal, for example by means of a metal sleeve and membrane.
  • a biasing spring is provided for the actuator, which may be formed, for example, as the actuator surrounding pipe spring.
  • Fig. 1 shows a non-inventive fuel injection valve 1 in a schematic, partial sectional view.
  • the fuel injection valve 1 can serve in particular as an injector for fuel injection systems of air-compressing, self-igniting internal combustion engines.
  • a preferred use of the fuel injector 1 is for a fuel injection system having a fuel rail that stores diesel fuel under high pressure and distributes it to a plurality of fuel injectors 1.
  • the fuel injection valve 1 according to the invention is also suitable for other applications in a correspondingly modified embodiment.
  • the fuel injection valve 1 comprises a multi-part housing 2 with a holding body 3, a nozzle body 4 and a clamping nut 5.
  • a nozzle needle 6 is arranged in the nozzle body 4.
  • the nozzle needle 6 may be axially guided in the nozzle body 4 along an axis 7 of the nozzle needle 6.
  • the nozzle needle 6 is designed as an inwardly opening nozzle needle 6.
  • an actuator chamber 8 is configured, which is relieved of pressure via a low-pressure line 9.
  • an actuator 10 is arranged, which is designed in this embodiment as a piezoelectric actuator 10.
  • the actuator 10 is supported on the one hand via an actuator base 11 on the holding body 3.
  • an actuator head 12 is attached to the actuator 10.
  • the actuator head 12 and the actuator base 11 are interconnected by a component 13. If the actuator 10 is designed as a dry actuator 10, then a seal relative to the actuator chamber 8 can be achieved in that the component 13 is designed as a sealing sleeve 13. It can also be a bias of the actuator 10 can be achieved in that the component 13 is designed as a surrounding the actuator 10 Bourdon tube 13.
  • a fuel chamber 14 is also provided, which can be filled via a high-pressure line 15 with fuel under high pressure.
  • a body component 16 of the holding body 3 separates the actuator space
  • a biasing spring is arranged for biasing the actuator 10 in a correspondingly modified embodiment between the body member 16 and the actuator head 12.
  • the body member 16 is configured in this embodiment 16 as a plate-shaped body member 16.
  • the body member 16 has a through hole 17 through which a transmission pin 18 extends.
  • the transfer pin 18 is here guided in the through hole 17, in particular guided pressure-tight.
  • a mechanical translator 19 is arranged in the fuel chamber 14.
  • the mechanical translator 19 has an actuating part 20 and lever elements 21, 22.
  • the actuator 10 acts via the transmission pin 18 on the actuating part 20 of the mechanical translator 19 a.
  • a compensation device 30 is provided, which in this embodiment has a base body 31 with a transmission part 32, a lifting part 33 and a guide part 34.
  • the compensation device 30 is located in the chain of action from the actuator 10 to the nozzle needle 6.
  • the compensation device 30 is in the chain of effects from the actuator 10 to the nozzle needle 6 between the mechanical translator 19 and the nozzle needle. 6
  • the mechanical translator 19 translates a stroke of the actuator 10 into a stroke of the nozzle needle 6.
  • the compensation device 30 is already subjected to the translated stroke.
  • the stroke of the balancing device 30 thus coincides with the stroke of the nozzle needle 6.
  • the fuel injection valve 1 also has a plate 35 which is arranged fixedly relative to the housing 2 and through which the transmission part 32 of the main body 31 of the compensation device 30 extends.
  • a through hole 36 of the plate 35, through which the transmission part 32 extends be designed as a guide bore 36, in which the transmission part 32 is axially guided.
  • the through-bore 36 can also be designed as a passage opening 36, through which the transmission part 32 extends with radial play.
  • the nozzle needle 6 can be guided axially within the nozzle body 4.
  • a further fuel chamber 37 is configured, in which the nozzle needle 6 is arranged.
  • the plate-shaped lifting part 33 of the main body 31 is located in the fuel chamber 14.
  • the guide part 34 of the main body 31 is located in the further fuel chamber 37.
  • the transmission part 32 of the main body 31 extends from the fuel chamber 14 into the further fuel chamber 37 and connects the lifting part 33 with the guide member 34.
  • the guide member 34 has a blind hole-shaped guide bore 38 in which a nozzle distal end 39 of the nozzle needle 6 is arranged.
  • the nozzle-distal end 39 of the nozzle needle 6 bounded in the blind hole-shaped guide bore 38 a compensation chamber 40 of the hydraulic balancer 30.
  • the compensation chamber 40 is filled in operation via the smallest possible leakage between the guide member 34 and the nozzle needle 6 with high pressure fuel.
  • the nozzle needle 6 may be guided in a shaft of the nozzle body 4, wherein in the guide region, a flow connection is provided. Via a nozzle closing spring 41 arranged in the fuel chamber 37, a closing of the nozzle needle 6 is made possible and a closed position predetermined. Due to the hydraulic compensation chamber 40 of the hydraulic compensation device 30 tolerances and occurring during operation, temperature expansions between the nozzle needle 6 and the actuator 10 can be compensated. In particular, different thermal length changes between the housing 2 and the actuator 10, the nozzle needle 6 and the individual components in the chain of effects between the actuator 10 and the nozzle needle 6 can be compensated for in this way.
  • the lever elements 21, 22 are on the one hand in contact with the actuating part 20 and on the other hand with the base body 31, wherein the lever elements 21, 22 are supported on the plate 35.
  • a biased rest-bearing spring element which causes a play-free rest position of the transmission components, especially the lever members 21, 22 of the base body 31 and the actuating member 20 between the actuating member 20 and the plate-shaped lifting part 33 of the base body 31.
  • the actuating member 20 for this purpose a blind hole-shaped recess which receives the rest position spring element 45 partially.
  • the transfer pin 18 is guided high pressure-tight and has a small diameter. As a result, the pressure force on the actuator 10 is kept low.
  • the actuator 10 is charged in this embodiment, whereby it expands.
  • the lever elements 21, 22 are actuated, so that in turn the main body 31 is actuated.
  • This requires a reversal of movement.
  • the pressure in the expansion chamber 40 drops and the nozzle needle 6 opens.
  • the mechanical translator 19 may be configured with a fixed or a variable Hubüber GmbH.
  • the mechanical translator 19 preferably translates the stroke of the actuator 10 into an x-fold stroke of the nozzle needle 6, where x is greater than one.
  • x is not less than two, that is greater than or equal to two.
  • x is from a range of about two to about five. Transmission losses and gap losses of the hydraulic balancing device 30 can thereby be kept low.
  • the actuator 10 is discharged in this embodiment, causing it to contract again.
  • no force is exerted on the actuating part 20, so that the lever elements 21, 22 are relieved by the operating part 20.
  • the nozzle needle 6 is then closed by the nozzle closing spring 41.
  • Fig. 2 shows an embodiment of a fuel injection valve 1 according to the invention in a schematic, excerpted sectional view.
  • the transmission part 32 is in this case guided in the guide bore 36 designed as a through hole 36.
  • the nozzle needle 6 is guided in the nozzle body 4.
  • a sealing sleeve 50 is provided in the fuel chamber 37.
  • the sealing sleeve 50 is in this case arranged at the nozzle-distal end 39 of the nozzle needle 6.
  • the sealing sleeve 50 has a sealing edge 51, with which the sealing sleeve 50 bears against the plate 35.
  • a compensation chamber 40 of the compensation device 30 is formed in this embodiment, which is enclosed by the sealing sleeve 50.
  • the sealing sleeve 50 is acted upon by the nozzle closing spring 41 against the plate 35.
  • the transmission part 32 protrudes into the inner region of the sealing sleeve 50, whereby the sealing sleeve 50 effectively separates the compensation chamber 40 in its interior from the outer part of the further fuel chamber 37.
  • the compensation chamber 40 is limited in this embodiment by the nozzle-distal end 39 of the nozzle needle 6, a nozzle-distal end 39 facing end face 52 of the transmission part 32 and the sealing sleeve 50.
  • a diameter of the transmission part 32 is smaller than a diameter of the nozzle-distal end 39 of the nozzle needle 6.
  • other embodiments are possible.

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 (4)

  1. Soupape d'injection de carburant (1), en particulier injecteur pour des installations d'injection de carburant de moteurs à combustion interne à compression d'air et auto-allumage, comprenant un actionneur (10), un pointeau de buse (6) et un multiplicateur mécanique (19), le multiplicateur mécanique (19) multipliant une course de l'actionneur (10) en une course du pointeau de buse (6),
    un dispositif d'équilibrage hydraulique (30) étant prévu, et lors de la multiplication de la course de l'actionneur (10) en la course du pointeau de buse (6), l'actionneur (10) agissant par le biais du multiplicateur mécanique (19) sur le dispositif d'équilibrage (30) et le multiplicateur mécanique (19) agissant par le biais du dispositif d'équilibrage (30) sur le pointeau de buse (6),
    le multiplicateur mécanique (19) présentant au moins un élément de levier (21, 22), le dispositif d'équilibrage (30) présentant un corps de base (31) et lors de la multiplication de la course de l'actionneur (10) dans la course du pointeau de buse (6), l'au moins un élément de levier (21, 22) agissant sur le corps de base (31),
    le corps de base (31) du dispositif d'équilibrage (30) présentant une partie de transmission (32) et une partie de course en forme de plaque (33) sur laquelle agit l'au moins un élément de levier (21, 22) lors de la multiplication de la course de l'actionneur (10) dans la course du pointeau de buse (6),
    et une plaque (35) disposée fixement par rapport à un boîtier (2) étant prévue et la partie de transmission (32) du dispositif d'équilibrage (30) s'étendant à travers la plaque (35), et la plaque (35) présentant un alésage de guidage (36) dans lequel la partie de transmission (32) du dispositif d'équilibrage (30) est guidée axialement,
    caractérisée en ce
    qu'une douille d'étanchéité (50) est prévue, laquelle est sollicitée par un élément de ressort (41) vers un côté de la plaque (35) tourné vers une extrémité (39) éloignée de la buse du pointeau de buse (6), en ce qu'à l'intérieur de la douille d'étanchéité (50) est formé un espace d'équilibrage (40) du dispositif d'équilibrage (30) et en ce que l'extrémité (39) éloignée de la buse du pointeau de buse (6) et un côté frontal (52) de la partie de transmission (32) tourné vers l'extrémité (39) éloignée de la buse du pointeau de buse (6) délimitent l'espace d'équilibrage (40).
  2. Soupape d'injection de carburant selon la revendication 1,
    caractérisée en ce que
    le multiplicateur mécanique (19) présente une partie d'actionnement (20) par le biais de laquelle l'actionneur (10), lors de la multiplication de la course de l'actionneur (10) dans la course du pointeau de buse (6), actionne l'au moins un élément de levier (21, 22), et en ce qu'un élément de ressort de position de repos précontraint (45) est prévu, lequel s'appuie d'une part contre la partie d'actionnement (20) du multiplicateur mécanique (19) et d'autre part contre la partie de course (33) du corps de base (31) du dispositif d'équilibrage (30).
  3. Soupape d'injection de carburant selon la revendication 1 ou 2, caractérisée en ce que le multiplicateur mécanique (19) permet une multiplication de course fixe ou variable de la course de l'actionneur (10) en une course multipliée par x du pointeau de buse (6), x étant supérieur à un ou n'étant pas inférieur à deux ou étant compris dans une plage d'environ deux à environ cinq.
  4. Soupape d'injection de carburant selon l'une quelconque des revendications 1 à 3,
    caractérisée en ce
    qu'un composant de corps (16) est prévu, lequel sépare un espace d'actionneur (8) dans lequel est disposé l'actionneur (10), d'une chambre de combustion (14) dans laquelle est disposé le multiplicateur mécanique (19), en ce que le composant corporel (16) présente un alésage traversant (17) dans lequel est guidée une goupille de transmission (18), et en ce que l'actionneur (10) agit au moyen de la goupille de transmission (18) sur une partie d'actionnement (20) du multiplicateur mécanique (19).
EP13739736.0A 2012-09-18 2013-07-24 Soupape d'injection de carburant Active EP2898212B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102012216688.2A DE102012216688A1 (de) 2012-09-18 2012-09-18 Brennstoffeinspritzventil
PCT/EP2013/065594 WO2014044437A1 (fr) 2012-09-18 2013-07-24 Soupape d'injection de carburant

Publications (2)

Publication Number Publication Date
EP2898212A1 EP2898212A1 (fr) 2015-07-29
EP2898212B1 true EP2898212B1 (fr) 2016-06-08

Family

ID=48832944

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13739736.0A Active EP2898212B1 (fr) 2012-09-18 2013-07-24 Soupape d'injection de carburant

Country Status (4)

Country Link
EP (1) EP2898212B1 (fr)
CN (1) CN104641100B (fr)
DE (1) DE102012216688A1 (fr)
WO (1) WO2014044437A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102014206969A1 (de) * 2014-04-10 2015-10-15 Robert Bosch Gmbh Kraftstoffinjektor
CN108035812B (zh) * 2017-11-03 2019-11-26 中国航发北京航科发动机控制系统科技有限责任公司 一种可调节距的变比例温度补偿装置及方法

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10254186A1 (de) 2002-11-20 2004-06-17 Siemens Ag Injektor mit einer direkt angetriebenen Register-Düsennadel für die Kraftstoffeinspritzung in einen Verbrennungsmotor
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
DE102006031567A1 (de) * 2006-07-07 2008-01-10 Siemens Ag Einspritzsystem und Verfahren zum Herstellen eines Einspritzsystems
DE102007036571B3 (de) * 2007-08-03 2009-04-02 Continental Automotive Gmbh Injektor und Vorrichtung mit einem Gefäß und einem das Gefäß umschließenden Gehäuse
DE102007040510A1 (de) * 2007-08-28 2009-03-05 Robert Bosch Gmbh Aktorkopf für ein Piezoaktormodul und Piezoaktormodul
DE102011076956A1 (de) 2011-06-06 2012-12-06 Robert Bosch Gmbh Kraftstoffinjektor
KR101382282B1 (ko) 2012-02-29 2014-04-08 현대자동차(주) 엔진의 가변 흡기계 장치
DE102012211233A1 (de) 2012-06-29 2014-01-02 Robert Bosch Gmbh Brennstoffeinspritzventil

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
DE102012216688A1 (de) 2014-03-20
WO2014044437A1 (fr) 2014-03-27
CN104641100B (zh) 2017-10-13
EP2898212A1 (fr) 2015-07-29
CN104641100A (zh) 2015-05-20

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