EP2649374B1 - Glow plug having a graphite seal and an electric insulating layer - Google Patents
Glow plug having a graphite seal and an electric insulating layer Download PDFInfo
- Publication number
- EP2649374B1 EP2649374B1 EP11775780.7A EP11775780A EP2649374B1 EP 2649374 B1 EP2649374 B1 EP 2649374B1 EP 11775780 A EP11775780 A EP 11775780A EP 2649374 B1 EP2649374 B1 EP 2649374B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- glow
- glow tube
- tube
- pressed
- connection pin
- 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.)
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Links
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims description 28
- 229910002804 graphite Inorganic materials 0.000 title claims description 17
- 239000010439 graphite Substances 0.000 title claims description 17
- 238000007789 sealing Methods 0.000 claims description 40
- 239000002184 metal Substances 0.000 claims description 5
- 238000010438 heat treatment Methods 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 claims description 3
- 238000010292 electrical insulation Methods 0.000 description 11
- 238000002485 combustion reaction Methods 0.000 description 4
- 229920001971 elastomer Polymers 0.000 description 2
- 239000000806 elastomer Substances 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 1
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 1
- 239000012080 ambient air Substances 0.000 description 1
- 229910052796 boron Inorganic materials 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 150000004767 nitrides Chemical class 0.000 description 1
- 238000005121 nitriding Methods 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 239000008188 pellet Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 229910000679 solder Inorganic materials 0.000 description 1
- 238000007740 vapor deposition Methods 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23Q—IGNITION; EXTINGUISHING-DEVICES
- F23Q7/00—Incandescent ignition; Igniters using electrically-produced heat, e.g. lighters for cigarettes; Electrically-heated glowing plugs
- F23Q7/001—Glowing plugs for internal-combustion engines
Definitions
- the invention relates to a glow plug according to the preamble of claim 1 and a method for producing the glow plug.
- WO 2010/027697 It is known to use a metallic sealing ring as a sealing element between the glow tube and connecting bolt.
- a metallic sealing ring For electrical insulation of the metallic sealing ring of the connecting bolt is provided in the sealing area with an electrical insulating layer.
- the metallic sealing ring is used as a solder joint, welded joint or sintered metal powder.
- the glow plug according to the invention and the inventive method for producing the glow plug have the advantage that a safe and cost-effective radiator seal can be achieved, which withstands higher temperatures and manages without an additional cohesive connection.
- the seal is achieved in that the sealing element made of graphite in the form of a pre-pressed Grafitrings is pushed in the region of the sealing portion on an insulating layer formed on the connecting bolt and the glow tube is pressed in the sealing portion on the graphite ring.
- the pre-shredded graphite ring is much easier to reshape than a metal sealing ring and also adapts better to the adjacent forms of glow tube and connecting bolt.
- the electrical insulating layer is formed at least in the region of the sealing portion on the connecting bolt and / or at least in the region of the sealing portion in the opening on the inner wall of the glow tube.
- the press connection between glow tube, sealing element and connecting bolt is achieved by the glow tube at least in the region of the sealing portion has a diameter reduction, by means of which the sealing element is pressed as a graphite ring between the glow tube and connecting bolt.
- a diameter reduction of the glow tube carried out after the assembly of the pre-pressed graphics is suitable, whereby the glow tube is pressed onto the graphite ring by swaging.
- glow plug has a metallic housing 10 with a continuous longitudinal bore 12, in which a glow plug 14 is pressed as a radiator.
- the glow plug 14 consists of a metallic glow tube 16, in which an incandescent filament 18 is arranged, which is electrically contacted at one end with the glow tube 16 and at the other end with a terminal bolt 17.
- the connecting bolt 17, which is led out of the housing 10 at the opposite end to the glow plug 14 with a connection 21, is surrounded within the housing 10 by an annular space 13, which in turn is sealed off from the surroundings.
- the radiator seal 30 is formed by a sealing element 31 made of graphite and at least one electrical insulation.
- the sealing element 31 made of graphite is electrically insulated in a sealing section 23 between the glow tube 16 and the connecting bolt 17 and pressed there, wherein the electrical insulation, the sealing element 31 made of graphite at least in the region of the sealing portion 23 relative to the glow tube 16 and / or the connecting bolt 17th electrically isolated.
- the sealing element 31 made of graphite encloses with the inner surface of the connecting bolt 17.
- the electrical insulation is formed by an applied on the terminal bolt 17 electrical insulation layer 32.
- the sealing element 31 made of graphite is pressed between the insulating layer 32 and the glow tube 16.
- the electrical insulation is carried out by an electrical insulation layer 33 formed in the opening 22 in the region of the sealing section 23 on the inner wall of the glow tube 16.
- the sealing element 31 made of graphite is pressed between the insulating layer 33 and connecting bolt 17.
- connection bolt 17 and on the inner wall of the glow tube 16 in each case form an electrical insulation layer 32, 33 and then to compress the sealing element 31 made of graphite between the insulation layers.
- the electrical insulation layers 32 and 33 may be, for example, glass, silicate, boron or bosilicate glass, metal oxides, metal nitrides or metal oxynitrides, and are prepared by methods known per se, e.g. applied by vapor deposition on the connecting bolt 17 and / or on the inner wall of the glow tube 16.
- An effective radiator seal 30 between the glow tube 16 and terminal bolt 17 is realized by the sealing element 31 is pushed in the form of a pre-pressed Grafitrings on the connecting bolt 17 in the region of the electrical insulation layer 32, 33, so that the pre-pressed graphite ring in the opening 22 of the glow tube 16 is located in the region of the sealing portion 23.
- the glow tube 16 is reduced, for example, by swaging in diameter in the form of the diameter reduction 26, whereby the glow tube 16 presses in the region of the sealing portion 23 on the pre-pressed graphite ring.
- the pre-pressed graphite ring in the opening 22 of the glow tube 16 in the region of the sealing portion 23 between the glow tube 16 and terminal bolt 17 is pressed.
- the graphite ring used in vorgepresster form is deformed, thereby forming between the glow tube 16 and connecting bolt 17, the sealing element 31 made of graphite and thus the radiator seal 30 is formed.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Resistance Heating (AREA)
- Gasket Seals (AREA)
Description
Die Erfindung betrifft eine Glühkerze nach dem Oberbegriff des Anspruchs 1 sowie ein Verfahren zur Herstellung der Glühkerze.The invention relates to a glow plug according to the preamble of claim 1 and a method for producing the glow plug.
Die Glühkerzen des Standes der Technik weisen einen in ein metallisches Gehäuse eingesetzten Glühstift auf, der mit einem Glührohr und einer im Glührohr angeordneten Glühwendel ausgeführt ist. Die Glühwendel ist an einem Ende in einer Öffnung des Glührohres mit einem Anschlussbolzen und am anderen Ende mit dem metallischen Glührohr elektrisch kontaktiert. Die Öffnung des Glührohres ist zwischen Glührohr und Anschlussbolzen zum Schutz der Glühwendel mittels einer Heizkörperdichtung gegen Umgebungsluft abgedichtet. Damit zwischen dem Glührohr und Anschlussbolzen kein Kurzschluss entsteht ist die Heizkörperdichtung durch ein Dichtelement aus einem Elastomer ausgeführt. Die Maximaltemperatur für das Dichtelement aus Elastomer ist bei langfristigem Einsatz bei 200 °C auf 1000 Stunden beschränkt. Beim Einsatz in Verbrennungsmotoren spielt diese Einsatzgrenze eine untergeordnete Rolle, da der Zylinderkopf der Verbrennungsmotoren, in die Glühkerze mit dem Gehäuse eingeschraubt wird, unter 200 °C gekühlt wird.The glow plugs of the prior art have a glow plug inserted into a metallic housing, which is embodied with an incandescent tube and an incandescent tube arranged in the incandescent tube. The incandescent filament is electrically contacted at one end in an opening of the glow tube with a connecting bolt and at the other end with the metallic glow tube. The opening of the glow tube is sealed between glow tube and connecting bolt to protect the filament by means of a radiator seal against ambient air. So that no short circuit occurs between the glow tube and connecting bolt, the radiator seal is performed by a sealing element made of an elastomer. The maximum temperature for the elastomeric sealing element is limited to 1000 hours for long-term use at 200 ° C. When used in internal combustion engines, this use limit plays a minor role, since the cylinder head of the internal combustion engines, is screwed into the glow plug with the housing, cooled below 200 ° C.
Es ist auch denkbar, Glühkerzen außerhalb des gekühlten Motorblocks einzusetzen, z. B. im Abgasstrang eines Kraftfahrzeugs, in Injektionsbrennern zum Beheizen des Abgasstrangs, in Zuheizeinrichtungen für Kraftfahrzeuge oder für Anwendungsbereiche außerhalb von Kraftfahrzeugen, z. B. als Zündquelle für Pellet-Heizungen. Bei derartigen Anwendungen, in denen die Umgebung der Glühkerze nicht mehr gekühlt wird, kann ein Elastomer nicht mehr als Dichtelement eingesetzt werden.It is also conceivable to use glow plugs outside of the cooled engine block, z. B. in the exhaust system of a motor vehicle, in injection burners for heating the exhaust line, in Zuheizeinrichtungen for motor vehicles or for applications outside of motor vehicles, eg. B. as an ignition source for pellet heaters. In such applications where the environment of the Glow plug is no longer cooled, an elastomer can not be used as a sealing element.
Aus
Einen Glühstift mittels eines Dichtelements aus Grafit in einem Gehäuse der Glühkerze dicht aufzunehmen ist aus
Die erfindungsgemäße Glühkerze und das erfindungsgemäße Verfahren zur Herstellung der Glühkerze haben den Vorteil, dass eine sichere und kostengünstige Heizkörperdichtung erzielbar ist, die höheren Temperaturen standhält und ohne eine zusätzliche stoffschlüssige Verbindung auskommt. Die Abdichtung kommt dabei dadurch zustande, dass das Dichtelement aus Grafit in Form eines vorgepressten Grafitrings im Bereich des Dichtungsabschnitts auf eine am Anschlussbolzen ausgebildete Isolationsschicht aufgeschoben wird und das Glührohr im Bereich Dichtungsabschnitts auf den Grafitring aufgepresst wird. Der vorgespresste Grafitring lässt sich wesentlich einfacher umformen als ein metallischer Dichtring und passt sich außerdem besser an die angrenzenden Formen von Glührohr und Anschlussbolzen an.The glow plug according to the invention and the inventive method for producing the glow plug have the advantage that a safe and cost-effective radiator seal can be achieved, which withstands higher temperatures and manages without an additional cohesive connection. The seal is achieved in that the sealing element made of graphite in the form of a pre-pressed Grafitrings is pushed in the region of the sealing portion on an insulating layer formed on the connecting bolt and the glow tube is pressed in the sealing portion on the graphite ring. The pre-shredded graphite ring is much easier to reshape than a metal sealing ring and also adapts better to the adjacent forms of glow tube and connecting bolt.
Vorteilhafte Weiterbildungen der Erfindung sind durch die Merkmale der Unteransprüche möglich.Advantageous developments of the invention are possible by the features of the subclaims.
Zweckmäßigerweise wird die elektrische Isolierschicht zumindest im Bereich des Dichtungsabschnitts am Anschlussbolzen und/oder zumindest im Bereich des Dichtungsabschnitts in der Öffnung an der Innenwand des Glührohres ausgebildet. Die Pressverbindung zwischen Glührohr, Dichtelement und Anschlussbolzen wird dadurch erzielt, indem das Glührohr zumindest im Bereich des Dichtungsabschnittes eine Durchmesserreduzierung aufweist, mittels welcher das Dichtelement als Grafitring zwischen Glührohr und Anschlussbolzen verpresst wird.Advantageously, the electrical insulating layer is formed at least in the region of the sealing portion on the connecting bolt and / or at least in the region of the sealing portion in the opening on the inner wall of the glow tube. The press connection between glow tube, sealing element and connecting bolt is achieved by the glow tube at least in the region of the sealing portion has a diameter reduction, by means of which the sealing element is pressed as a graphite ring between the glow tube and connecting bolt.
Als zweckmäßiges Verfahren eignet sich eine nach der Montage des vorgepressten Grafitrings durchgeführte Durchmesserreduzierung des Glührohres, wodurch das Glührohr auf den Grafitring durch Rundkneten aufgepresst wird.As a suitable method, a diameter reduction of the glow tube carried out after the assembly of the pre-pressed graphics is suitable, whereby the glow tube is pressed onto the graphite ring by swaging.
Ausführungsbeispiele der Erfindung sind in der Zeichnung dargestellt und in der nachfolgenden Beschreibung näher erläutert.Embodiments of the invention are illustrated in the drawings and explained in more detail in the following description.
Es zeigen:
-
Figur 1 eine Schnittdarstellung durch eine Glühkerze, -
Figur 2 einen vergrößerten Abschnitt II der Glühkerze inFigur 1 mit einer ersten Ausführungsform einer Heizkörperdichtung und -
Figur 3 der vergrößerte Abschnitt II der Glühkerze inFigur 1 mit einer zweiten Ausführungsform einer Heizwendeldichtung.
-
FIG. 1 a sectional view through a glow plug, -
FIG. 2 an enlarged section II of the glow plug inFIG. 1 with a first embodiment of a radiator seal and -
FIG. 3 the enlarged section II of the glow plug inFIG. 1 with a second embodiment of a Heizwendeldichtung.
Die in
Das Glührohr 16 ist an dem in einen Brennraum einer Brennkraftmaschine weisenden Ende geschlossen und weist am dazu gegenüberliegenden Ende zum Ringraum 13 hin eine Öffnung 22 auf. Zur Kontaktierung der Glühwendel 18 ist gemäß
Wesentlich für die Lebensdauer der Glühwendel 18 ist, dass das Material der Glühwendel 18 gegenüber einer oxidierenden und nitrierenden Atmosphäre geschützt ist. Dazu ist der Innenraum des Glührohres 16 an der Öffnung 22 mit einer Heizkörperdichtung 30 verschlossen. Die Heizkörperdichtung 30 wird von einem Dichtelement 31 aus Grafit und mindestens einer elektrischen Isolierung gebildet. Das Dichtelement 31 aus Graphit ist in einem Dichtungsabschnitt 23 zwischen dem Glührohr 16 und dem Anschlussbolzen 17 elektrisch isoliert angeordnet und dort verpresst, wobei die elektrische Isolierung das Dichtelement 31 aus Grafit zumindest im Bereich des Dichtungsabschnitts 23 gegenüber dem Glührohr 16 und/oder dem Anschlussbolzen 17 elektrisch isoliert. Der Dichtelement 31 aus Grafit umschließt dabei mit der inneren Fläche den Anschlussbolzen 17. Auf die äußere Umfangsfläche des Dichtelements 31 aus Grafit wird das Glührohr 16 gepresst. Die elektrische Isolierung ist notwendig, weil Grafit elektrische leitend ist und ein Kurzschluss zwischen Glührohr 16 und Anschlussbolzen 17 vermieden werden muss. Zur Ausbildung der Heizkörperdichtung 30 weist das Glührohr 16 zumindest im Bereich des Dichtungsabschnitts 23 eine Durchmesserreduzierung 26 auf, mittels welcher das Dichtelement 31 aus Grafit zwischen Glührohr 16 und dem Anschlussbolzen 17 verpresst ist.Essential for the life of the
Beim Ausführungsbeispiel gemäß
Beim Ausführungsbeispiel gemäß
Es ist aber auch denkbar sowohl am Anschlussbolzen 17 als auch an der Innenwand des Glührohres 16 jeweils eine elektrische Isolationsschicht 32, 33 auszubilden und das Dichtelement 31 aus Grafit dann zwischen den Isolationsschichten zu verpressen.However, it is also conceivable both on the
Die elektrischen Isolationsschichten 32 und 33 können beispielsweise aus Glas, Silikat-, Bor- oder Bosilikatglas, Metalloxiden, Metallnitride oder Metalloxynitride bestehen und werden durch an sich bekannten Verfahren, z.B. mittels Gasphasenabscheidung auf den Anschlussbolzen 17 und/oder an der Innenwand des Glührohres 16 aufgebracht.The
Eine wirksame Heizkörperdichtung 30 zwischen Glührohr 16 und Anschlussbolzen 17 wird dadurch realisiert, indem das Dichtelement 31 im Form eines vorgepressten Grafitrings auf den Anschlussbolzen 17 im Bereich der elektrischen Isolationsschicht 32, 33 aufgeschoben wird, so dass sich der vorgepresste Grafitring in der Öffnung 22 des Glührohres 16 im Bereich des Dichtungsabschnitts 23 befindet. Nachfolgend wird das Glührohr 16 beispielsweise durch Rundkneten im Durchmesser in Form der Durchmesserreduzierung 26 reduziert, wodurch sich das Glührohr 16 im Bereich des Dichtungsabschnitts 23 auf den vorgepressten Grafitring presst. Dadurch wird der vorgepresste Grafitring in der Öffnung 22 des Glührohres 16 im Bereich des Dichtungsabschnitts 23 zwischen Glührohr 16 und Anschlussbolzen 17 verpresst. Der in vorgepresster Form eingesetzte Grafitring wird dabei verformt, wodurch sich zwischen Glührohr 16 und Anschlussbolzen 17 das Dichtelement 31 aus Grafit ausbildet und dadurch die Heizkörperdichtung 30 entsteht.An
Claims (7)
- Glow plug having a metal housing (10) which has an elongate hole (12) in which a glow pencil (14) is accommodated, the said glow pencil having a glow tube (16) and a glow coil (18) which is arranged in the glow tube (16), wherein the glow tube (16) makes electrical contact with one end of the glow coil (18) and a connection pin (17) makes electrical contact with the other end of the said glow coil, wherein the connection pin (17) projects into an axial opening (22) in the glow tube (16) and there is connected to the glow tube (16) in an electrically insulating manner in a seal section (23) by means of a heating element seal (30) which is designed with at least one electrical insulating layer (32, 33), characterized in that the heating element seal (30) is additionally designed with a graphite sealing element (31), and in that the glow tube (16) is pressed onto the connection pin (17) with the graphite sealing element (31).
- Glow plug according to Claim 1, characterized in that the electrical insulating layer (32) is formed on the connection pin (17) at least in the region of the seal section (23).
- Glow plug according to Claim 1, characterized in that the electrical insulating layer (33) is formed on the inner wall of the glow tube (16) at least in the region of the seal section (23).
- Glow plug according to Claim 1, characterized in that an electrical insulating layer (32, 33) is formed in each case on the connection pin (17) and on the inner wall of the glow tube (16) at least in the region of the seal section (23).
- Glow plug according to one of the preceding claims, characterized in that the glow tube (16) has a reduced diameter (26) at least in the region of the seal section (23), the graphite sealing element (31) being pressed with the connection pin (17) by means of the said reduced diameter.
- Method for producing the glow plug according to one of the preceding claims, characterized in that the sealing element (31) is arranged on the connection pin (17) in the region of the seal section (23) in the form of a pre-pressed graphite ring, and in that the pre-pressed graphite ring is then pressed between glow tube (16) and connection pin (17) in the opening (22) in the glow tube (16) in the seal section (23).
- Method according to Claim 6, characterized in that the glow tube (16) is given a reduced diameter (26) at least in the region of the seal section (23) by rotary swaging, the pre-pressed graphite ring being pressed between glow tube (16) and connection pin (17) by virtue of the said reduced diameter.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102010062438A DE102010062438A1 (en) | 2010-12-06 | 2010-12-06 | Glow plug and method for its production |
| PCT/EP2011/068708 WO2012076246A1 (en) | 2010-12-06 | 2011-10-26 | Glow plug having a graphite seal and an electric insulating layer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP2649374A1 EP2649374A1 (en) | 2013-10-16 |
| EP2649374B1 true EP2649374B1 (en) | 2014-10-08 |
Family
ID=44863035
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP11775780.7A Active EP2649374B1 (en) | 2010-12-06 | 2011-10-26 | Glow plug having a graphite seal and an electric insulating layer |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP2649374B1 (en) |
| CN (1) | CN103250002B (en) |
| DE (1) | DE102010062438A1 (en) |
| WO (1) | WO2012076246A1 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR3025153B1 (en) * | 2014-09-01 | 2016-12-09 | Bosch Gmbh Robert | GLOW PLUG |
| CN104439693A (en) * | 2014-12-08 | 2015-03-25 | 西安创新精密仪器研究所 | Rotary forging connection process for homogeneous or heterogeneous metal tubes and bars |
| DE102015205665A1 (en) * | 2015-03-30 | 2016-10-06 | Robert Bosch Gmbh | Glow plug with a glow plug and internal combustion engine |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1119597B (en) * | 1958-11-13 | 1961-12-14 | Bosch Gmbh Robert | Glow plug for internal combustion engines |
| DE4335292A1 (en) * | 1993-10-15 | 1995-04-20 | Beru Werk Ruprecht Gmbh Co A | Glow plug |
| IT235871Y1 (en) * | 1995-05-31 | 2000-07-18 | Cooper Ind Inc | SELF-CLEANING OSCILLATING GASKET FOR AN ARMORED RESISTANCE OF A PRE-HEATING CANDLE FOR DIESEL ENGINES |
| DE19914619A1 (en) * | 1999-03-31 | 2000-10-12 | Beru Ag | Method for sealing the connection-side end region of the glow tube of a glow plug and glow plugs with a closure according to the method |
| DE102004043874A1 (en) | 2004-09-10 | 2006-03-16 | Robert Bosch Gmbh | Device for detecting the pressure in a combustion chamber of an internal combustion engine |
| US20090184101A1 (en) * | 2007-12-17 | 2009-07-23 | John Hoffman | Sheathed glow plug |
| US20100059496A1 (en) | 2008-09-08 | 2010-03-11 | Federal-Mogul Ignition Company | Metal sheath glow plug |
-
2010
- 2010-12-06 DE DE102010062438A patent/DE102010062438A1/en not_active Withdrawn
-
2011
- 2011-10-26 CN CN201180058562.6A patent/CN103250002B/en not_active Expired - Fee Related
- 2011-10-26 EP EP11775780.7A patent/EP2649374B1/en active Active
- 2011-10-26 WO PCT/EP2011/068708 patent/WO2012076246A1/en active Application Filing
Also Published As
| Publication number | Publication date |
|---|---|
| CN103250002B (en) | 2015-04-01 |
| WO2012076246A1 (en) | 2012-06-14 |
| CN103250002A (en) | 2013-08-14 |
| DE102010062438A1 (en) | 2012-06-06 |
| EP2649374A1 (en) | 2013-10-16 |
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