DE102010035186A1 - Valve train for use in internal combustion engine, has actuator associated to sensors and arranged on axial region for detecting instantaneous axial positions, where actuator is exactly assigned to cam pieces - Google Patents
Valve train for use in internal combustion engine, has actuator associated to sensors and arranged on axial region for detecting instantaneous axial positions, where actuator is exactly assigned to cam pieces Download PDFInfo
- Publication number
- DE102010035186A1 DE102010035186A1 DE102010035186A DE102010035186A DE102010035186A1 DE 102010035186 A1 DE102010035186 A1 DE 102010035186A1 DE 102010035186 A DE102010035186 A DE 102010035186A DE 102010035186 A DE102010035186 A DE 102010035186A DE 102010035186 A1 DE102010035186 A1 DE 102010035186A1
- Authority
- DE
- Germany
- Prior art keywords
- actuator
- cam
- axial
- cam piece
- sensor
- 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.)
- Ceased
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Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
- G01B7/02—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L13/00—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations
- F01L13/0015—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque
- F01L13/0036—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque the valves being driven by two or more cams with different shape, size or timing or a single cam profiled in axial and radial direction
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L13/00—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations
- F01L13/0015—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque
- F01L13/0036—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque the valves being driven by two or more cams with different shape, size or timing or a single cam profiled in axial and radial direction
- F01L2013/0052—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque the valves being driven by two or more cams with different shape, size or timing or a single cam profiled in axial and radial direction with cams provided on an axially slidable sleeve
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L13/00—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations
- F01L2013/10—Auxiliary actuators for variable valve timing
- F01L2013/101—Electromagnets
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L2820/00—Details on specific features characterising valve gear arrangements
- F01L2820/04—Sensors
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Valve Device For Special Equipments (AREA)
Abstract
Description
Die Erfindung betrifft einen Ventiltrieb einer Brennkraftmaschine mit variabler Gaswechselventilbetätigung, mit einer Nockenwelle, die eine Trägerwelle und ein oder mehrere darauf drehfest und zwischen Axialpositionen verschiebbar angeordnete Nockenstücke umfasst, die jeweils eine Nockengruppe unmittelbar benachbarter Nocken unterschiedlicher Erhebungen und eine Axialkulisse aufweisen, und mit einem oder mehreren Aktuatoren, denen die Nockenstücke zugeordnet sind und die jeweils einen in die zugeordnete Axialkulisse einkoppelbaren Betätigungsstift zum Verschieben des Nockenstücks in eine der Axialpositionen umfassen, wobei zum Detektieren der momentanen Axialposition zumindest einer der Aktuatoren einen im axialen Bereich der zugeordneten Axialkulisse angeordneten Sensor umfasst und das diesem Aktuator zugeordnete Nockenstück ein für dessen Axialpositionen jeweils charakteristisches Signal am Sensor erzeugt.The invention relates to a valve train of an internal combustion engine with variable gas exchange valve actuation, with a camshaft comprising a support shaft and one or more non-rotatably mounted thereon and axially displaceable between axial cam pieces, each having a cam group immediately adjacent cams of different elevations and an axial slide, and with one or a plurality of actuators, which are assigned to the cam pieces and each include an engageable in the associated Axialkulisse actuating pin for moving the cam piece in one of the axial positions, wherein for detecting the current axial position of at least one of the actuators comprises a arranged in the axial region of the associated Axialkulisse sensor and the associated with this actuator cam piece generates a characteristic of the axial position of each signal on the sensor.
Hintergrund der ErfindungBackground of the invention
Variable Ventiltriebe mit axial verschiebbaren Nockenstücken sind grundsätzlich und beispielsweise aus der
Um den Verschiebevorgang des Nockenstücks von einer ersten in eine zweite Axialposition zu überwachen, ist es im Stand der Technik bereits vorgeschlagen, die Funktion des Aktuators nicht auf das Verschieben des Nockenstücks mittels des in die Axialkulisse einkoppelnden Betätigungsstifts zu beschränken, sondern um das Detektieren der momentanen Axialposition des Nockenstücks zu erweitern. So ist in der
In der als gattungsbildend betrachteten
Aufgabe der ErfindungObject of the invention
Der vorliegenden Erfindung liegt die Aufgabe zu Grunde, einen Ventiltrieb der eingangs genannten Art anzugeben, der konstruktiv möglichst einfach gestaltet ist.The present invention is based on the object to provide a valve train of the type mentioned, which is structurally designed as simple as possible.
Zusammenfassung der ErfindungSummary of the invention
Die Lösung dieser Aufgabe ergibt sich aus den kennzeichnenden Merkmalen des Anspruchs 1, während vorteilhafte Weiterbildungen und Ausgestaltungen der Erfindung den Unteransprüchen entnehmbar sind. Demnach soll jedem der Aktuatoren genau ein Nockenstück zugeordnet sein. Mit anderen Worten soll jeder der Aktuatoren, der mit einem Sensor ausgestattet ist, d. h. jeder Sensor-Aktuator die Axialposition von lediglich einem, nämlich diesem Aktuator zugeordneten Nockenstück und – in konstruktiv vereinfachender Weise – unabhängig von der Axialposition des benachbarten Nockenstücks detektieren. Es können wahlweise lediglich ein, mehrere oder alle Aktuatoren des Ventiltriebs mit einem Sensor ausgestattet sein.The solution of this problem arises from the characterizing features of
Bei dem Sensor handelt es sich zweckmäßigerweise um einen Hall-Sensor und besonders bevorzugt um einen Differenzial-Hall-Sensor mit zwei Hall-Sensoren, die in Differenzialschaltung weitgehend unempfindlich auf Störgrößen wie Temperaturänderungen oder externe Magnetfelder reagieren und sich folglich durch hohe Genauigkeit auszeichnen.The sensor is expediently a Hall sensor and particularly preferably a differential Hall sensor with two Hall sensors, which react in differential circuit largely insensitive to disturbance variables such as temperature changes or external magnetic fields and are therefore characterized by high accuracy.
In einer konstruktiven Ausgestaltung sollen der oder die Sensor-Aktuatoren jeweils einen im Bereich des Hall-Sensors angeordneten Permanentmagneten umfassen, wobei die für die Axialpositionen der jeweils zugeordneten Nockenstücke charakteristischen Sensorsignale durch Aussparungen erzeugt werden, die mit und/oder bei unterschiedlichen Winkeln am Umfang der Nockenstücke positioniert sind. „Mit unterschiedlichen Umfangswinkeln” bedeutet, dass die Bogenlängen der Aussparungen in den einzelnen Axialpositionen voneinander verschieden sind. „Bei unterschiedlichen Umfangswinkeln” bedeutet, dass die auf einen Referenzwinkel bezogenen Winkelpositionen der Aussparungen in den einzelnen Axialpositionen voneinander verschieden sind.In a constructional embodiment, the sensor actuator (s) should each comprise a permanent magnet arranged in the region of the Hall sensor, wherein the sensor signals characteristic of the axial positions of the respectively assigned cam pieces are produced by recesses which coincide with and / or at different angles on the circumference Cam pieces are positioned. "With different circumferential angles" means that the arc lengths of the recesses differ from each other in the individual axial positions are. "At different circumferential angles" means that the angular positions of the recesses in the individual axial positions relative to a reference angle are different from one another.
In einer dazu alternativen konstruktiven Ausgestaltung soll der im Bereich des Hall-Sensors angeordnete Permanentmagnet durch permanentmagnetische Abschnitte ersetzt werden, die mit und/oder bei unterschiedlichen Winkeln am Umfang des Nockenstücks (und nicht wie vorstehend im Aktuatorgehäuse) positioniert sind. Bei den permanentmagnetischen Abschnitten kann es sich einerseits um Permanentmagnete, die in das Nockenstück an dessen Umfang eingesetzt sind, und andererseits um lokale Aufmagnetisierungen des Nockenstückumfangs handeln.In an alternative structural design of the arranged in the Hall sensor permanent magnet is to be replaced by permanent magnetic sections that are positioned with and / or at different angles on the circumference of the cam piece (and not as above in the actuator housing). The permanent-magnetic sections may be, on the one hand, permanent magnets inserted into the cam piece on its circumference and, on the other hand, local magnetizations of the cam piece circumference.
Als weitere Bauarten berührungsloser Sensoren seien Reedkontakte, Induktivgeber oder magnetoresistive Sensoren genannt. Je nach Ausgestaltung des Aktuator-Sensors und der am Sensor erzeugten Signale können diese auch einen Drehwinkelgeber der Nockenwelle ersetzen.Other types of non-contact sensors are reed contacts, inductive sensors or magnetoresistive sensors. Depending on the configuration of the actuator sensor and the signals generated on the sensor, these can also replace a rotary encoder of the camshaft.
Kurze Beschreibung der ZeichnungenBrief description of the drawings
Weitere Merkmale der Erfindung ergeben sich aus der nachfolgenden Beschreibung und aus den Zeichnungen, in denen ein Ausführungsbeispiel der Erfindung dargestellt ist. Sofern nicht anders erwähnt, sind dabei gleiche oder funktionsgleiche Merkmale oder Bauteile mit gleichen Bezugszahlen versehen. Es zeigen:Further features of the invention will become apparent from the following description and from the drawings, in which an embodiment of the invention is shown. Unless otherwise stated, the same or functionally identical features or components are provided with the same reference numbers. Show it:
Ausführliche Beschreibung der ZeichnungenDetailed description of the drawings
Die Erfindung sei zum besseren Verständnis ausgehend von
Zur Verschiebung des Nockenstücks
Der Mittenabstand der Betätigungsstifte
Nachfolgend ist das Zusammenspiel der beiden Betätigungsstifte
Ein Verschieben des Nockenstücks
Das nach Abschluss eines Verschiebevorgangs des Nockenstücks
Die
Wie aus
Für den Fall, dass sich das Nockenstück
Für den Fall, dass sich das Nockenstück
Für den Fall, dass sich das Nockenstück
BezugszeichenlisteLIST OF REFERENCE NUMBERS
- 11
- Trägerwellecarrier wave
- 22
- Nockenstückcam piece
- 33
- Nockencam
- 44
- Nockencam
- 55
- Nockenfolgercam follower
- 66
- zylindrischer Abschnittcylindrical section
- 77
- NockenwellenlagerstelleCamshaft bearing
- 88th
- Axialkulisseaxial slotted
- 99
- eine Kulissenbahna slide track
- 1010
- andere Kulissenbahnother slide track
- 1111
- Betätigungsstiftactuating pin
- 1212
- Betätigungsstiftactuating pin
- 1313
- Aktuatoractuator
- 1414
- KugelBullet
- 15 15
- Sperrstiftlocking pin
- 1616
- Elektromagnetelectromagnet
- 1717
- Aktuatorgehäuseactuator housing
- 1818
- Hall-SensorHall sensor
- 1919
- Permanentmagnetpermanent magnet
- 2020
- Aussparungrecess
- 2121
- Aussparungrecess
- 2222
- Winkel der AussparungAngle of the recess
- 2323
- Winkel der AussparungAngle of the recess
ZITATE ENTHALTEN IN DER BESCHREIBUNG QUOTES INCLUDE IN THE DESCRIPTION
Diese Liste der vom Anmelder aufgeführten Dokumente wurde automatisiert erzeugt und ist ausschließlich zur besseren Information des Lesers aufgenommen. Die Liste ist nicht Bestandteil der deutschen Patent- bzw. Gebrauchsmusteranmeldung. Das DPMA übernimmt keinerlei Haftung für etwaige Fehler oder Auslassungen.This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.
Zitierte PatentliteraturCited patent literature
- EP 0798451 B1 [0002] EP 0798451 B1 [0002]
- DE 102006035225 A1 [0003] DE 102006035225 A1 [0003]
- DE 102008024086 A1 [0003] DE 102008024086 A1 [0003]
- DE 102008049103 A1 [0004] DE 102008049103 A1 [0004]
Claims (7)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102010035186A DE102010035186A1 (en) | 2010-08-24 | 2010-08-24 | Valve train for use in internal combustion engine, has actuator associated to sensors and arranged on axial region for detecting instantaneous axial positions, where actuator is exactly assigned to cam pieces |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102010035186A DE102010035186A1 (en) | 2010-08-24 | 2010-08-24 | Valve train for use in internal combustion engine, has actuator associated to sensors and arranged on axial region for detecting instantaneous axial positions, where actuator is exactly assigned to cam pieces |
Publications (1)
Publication Number | Publication Date |
---|---|
DE102010035186A1 true DE102010035186A1 (en) | 2012-03-01 |
Family
ID=45565806
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE102010035186A Ceased DE102010035186A1 (en) | 2010-08-24 | 2010-08-24 | Valve train for use in internal combustion engine, has actuator associated to sensors and arranged on axial region for detecting instantaneous axial positions, where actuator is exactly assigned to cam pieces |
Country Status (1)
Country | Link |
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DE (1) | DE102010035186A1 (en) |
Cited By (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2013159937A1 (en) * | 2012-04-28 | 2013-10-31 | Audi Ag | Valve drive of an internal combustion engine |
DE102012011116A1 (en) * | 2012-06-05 | 2013-12-05 | Audi Ag | Method for operating a valve train of an internal combustion engine and corresponding valve train |
DE102012016030A1 (en) * | 2012-08-13 | 2014-05-15 | Audi Ag | Method for operating valve drive of internal combustion engine, involves driving actuator at camshaft angle for pushing driver, which lies in sliding camshaft angle range or ejection camshaft angle range |
DE102013201308A1 (en) * | 2013-01-28 | 2014-07-31 | Schaeffler Technologies Gmbh & Co. Kg | Actuator for sliding cam system of engine, has control pin that is actuated by electromagnet unit, so that pin is guided in pressure plate axially displaceably and form-locking counter to force direction of springs in their movement |
DE102013210487A1 (en) * | 2013-06-06 | 2014-12-24 | Schaeffler Technologies Gmbh & Co. Kg | Sliding cam system with position detection |
DE102014203001B3 (en) * | 2014-02-19 | 2015-08-06 | Schaeffler Technologies AG & Co. KG | Hubvariabler valve drive of an internal combustion engine |
DE102015011908A1 (en) | 2015-09-11 | 2016-04-14 | Daimler Ag | Valve train device and internal combustion engine with a valve drive device |
DE102016006491A1 (en) * | 2016-05-25 | 2017-11-30 | Audi Ag | Method for operating an internal combustion engine and corresponding internal combustion engine |
WO2018077452A1 (en) * | 2016-10-29 | 2018-05-03 | Daimler Ag | Valve train device |
DE102019106365A1 (en) * | 2019-03-13 | 2020-09-17 | Eto Magnetic Gmbh | Electromagnetic actuator assembly |
DE102020201694A1 (en) | 2020-02-11 | 2021-08-12 | Volkswagen Aktiengesellschaft | Adjusting device for an actuator pin of a machine part with a sliding groove and camshaft adjusting device with such an adjusting device |
DE102021214169A1 (en) | 2021-12-11 | 2023-06-15 | Volkswagen Aktiengesellschaft | Slider cam assembly with sensor for detecting the position of the slide cams |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0798451B1 (en) | 1996-03-25 | 1999-04-21 | Dr.Ing.h.c. F. Porsche Aktiengesellschaft | Valve control of an internal combustion engine |
DE102006035225A1 (en) | 2005-07-26 | 2007-02-01 | Eto Magnetic Kg | Electromagnetic actuator, evaluates signal from signal detectors which detect voltage across coil when in non-energized state to determine armature movement |
DE102008024086A1 (en) | 2008-05-17 | 2009-11-19 | Daimler Ag | Valve drive device |
DE102008049103A1 (en) | 2008-09-26 | 2010-04-01 | Daimler Ag | Valve train device, particularly for internal combustion engine, has two cam elements which are axially adjusted by shifting gate, and sensor unit |
-
2010
- 2010-08-24 DE DE102010035186A patent/DE102010035186A1/en not_active Ceased
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0798451B1 (en) | 1996-03-25 | 1999-04-21 | Dr.Ing.h.c. F. Porsche Aktiengesellschaft | Valve control of an internal combustion engine |
DE102006035225A1 (en) | 2005-07-26 | 2007-02-01 | Eto Magnetic Kg | Electromagnetic actuator, evaluates signal from signal detectors which detect voltage across coil when in non-energized state to determine armature movement |
DE102008024086A1 (en) | 2008-05-17 | 2009-11-19 | Daimler Ag | Valve drive device |
DE102008049103A1 (en) | 2008-09-26 | 2010-04-01 | Daimler Ag | Valve train device, particularly for internal combustion engine, has two cam elements which are axially adjusted by shifting gate, and sensor unit |
Cited By (21)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104271903A (en) * | 2012-04-28 | 2015-01-07 | 奥迪股份公司 | Valve drive of an internal combustion engine |
WO2013159937A1 (en) * | 2012-04-28 | 2013-10-31 | Audi Ag | Valve drive of an internal combustion engine |
CN104271903B (en) * | 2012-04-28 | 2016-04-27 | 奥迪股份公司 | The distribution device of internal-combustion engine |
US9228456B2 (en) | 2012-04-28 | 2016-01-05 | Audi Ag | Valve drive of an internal combustion engine |
US9611765B2 (en) | 2012-06-05 | 2017-04-04 | Audi Ag | Method for operating a valve train of an internal combustion engine and corresponding valve train |
DE102012011116A1 (en) * | 2012-06-05 | 2013-12-05 | Audi Ag | Method for operating a valve train of an internal combustion engine and corresponding valve train |
DE102012016030A1 (en) * | 2012-08-13 | 2014-05-15 | Audi Ag | Method for operating valve drive of internal combustion engine, involves driving actuator at camshaft angle for pushing driver, which lies in sliding camshaft angle range or ejection camshaft angle range |
DE102013201308A1 (en) * | 2013-01-28 | 2014-07-31 | Schaeffler Technologies Gmbh & Co. Kg | Actuator for sliding cam system of engine, has control pin that is actuated by electromagnet unit, so that pin is guided in pressure plate axially displaceably and form-locking counter to force direction of springs in their movement |
DE102013210487A1 (en) * | 2013-06-06 | 2014-12-24 | Schaeffler Technologies Gmbh & Co. Kg | Sliding cam system with position detection |
DE102014203001B3 (en) * | 2014-02-19 | 2015-08-06 | Schaeffler Technologies AG & Co. KG | Hubvariabler valve drive of an internal combustion engine |
DE102015011908A1 (en) | 2015-09-11 | 2016-04-14 | Daimler Ag | Valve train device and internal combustion engine with a valve drive device |
DE102016006491B4 (en) * | 2016-05-25 | 2019-03-07 | Audi Ag | Method for operating an internal combustion engine and corresponding internal combustion engine |
DE102016006491A1 (en) * | 2016-05-25 | 2017-11-30 | Audi Ag | Method for operating an internal combustion engine and corresponding internal combustion engine |
WO2018077452A1 (en) * | 2016-10-29 | 2018-05-03 | Daimler Ag | Valve train device |
DE102019106365A1 (en) * | 2019-03-13 | 2020-09-17 | Eto Magnetic Gmbh | Electromagnetic actuator assembly |
WO2020182400A1 (en) * | 2019-03-13 | 2020-09-17 | Eto Magnetic Gmbh | Electromagnetic actuator arrangement |
CN113631800A (en) * | 2019-03-13 | 2021-11-09 | Eto电磁有限责任公司 | Electromagnetic actuator structure |
US11923137B2 (en) | 2019-03-13 | 2024-03-05 | Eto Magnetic Gmbh | Electromagnetic actuator arrangement |
CN113631800B (en) * | 2019-03-13 | 2024-09-20 | Eto电磁有限责任公司 | Electromagnetic actuator structure |
DE102020201694A1 (en) | 2020-02-11 | 2021-08-12 | Volkswagen Aktiengesellschaft | Adjusting device for an actuator pin of a machine part with a sliding groove and camshaft adjusting device with such an adjusting device |
DE102021214169A1 (en) | 2021-12-11 | 2023-06-15 | Volkswagen Aktiengesellschaft | Slider cam assembly with sensor for detecting the position of the slide cams |
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R081 | Change of applicant/patentee |
Owner name: SCHAEFFLER TECHNOLOGIES AG & CO. KG, DE Free format text: FORMER OWNER: SCHAEFFLER TECHNOLOGIES GMBH & CO. KG, 91074 HERZOGENAURACH, DE Effective date: 20150407 |
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R016 | Response to examination communication | ||
R002 | Refusal decision in examination/registration proceedings | ||
R003 | Refusal decision now final |