JP6210704B2 - 車両のlnt制御方法 - Google Patents
車両のlnt制御方法 Download PDFInfo
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N9/00—Electrical control of exhaust gas treating apparatus
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- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
- F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
- F01N3/20—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
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- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/0807—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents
- F01N3/0828—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents characterised by the absorbed or adsorbed substances
- F01N3/0842—Nitrogen oxides
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- F01N11/00—Monitoring or diagnostic devices for exhaust-gas treatment apparatus, e.g. for catalytic activity
- F01N11/007—Monitoring or diagnostic devices for exhaust-gas treatment apparatus, e.g. for catalytic activity the diagnostic devices measuring oxygen or air concentration downstream of the exhaust apparatus
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- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/021—Introducing corrections for particular conditions exterior to the engine
- F02D41/0235—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus
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- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/021—Introducing corrections for particular conditions exterior to the engine
- F02D41/0235—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus
- F02D41/027—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus to purge or regenerate the exhaust gas treating apparatus
- F02D41/0275—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus to purge or regenerate the exhaust gas treating apparatus the exhaust gas treating apparatus being a NOx trap or adsorbent
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- F01N2550/00—Monitoring or diagnosing the deterioration of exhaust systems
- F01N2550/03—Monitoring or diagnosing the deterioration of exhaust systems of sorbing activity of adsorbents or absorbents
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2560/00—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics
- F01N2560/02—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics the means being an exhaust gas sensor
- F01N2560/025—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics the means being an exhaust gas sensor for measuring or detecting O2, e.g. lambda sensors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2560/00—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics
- F01N2560/14—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics having more than one sensor of one kind
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2900/00—Details of electrical control or of the monitoring of the exhaust gas treating apparatus
- F01N2900/06—Parameters used for exhaust control or diagnosing
- F01N2900/08—Parameters used for exhaust control or diagnosing said parameters being related to the engine
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2900/00—Details of electrical control or of the monitoring of the exhaust gas treating apparatus
- F01N2900/06—Parameters used for exhaust control or diagnosing
- F01N2900/16—Parameters used for exhaust control or diagnosing said parameters being related to the exhaust apparatus, e.g. particulate filter or catalyst
- F01N2900/1614—NOx amount trapped in catalyst
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2900/00—Details of electrical control or of the monitoring of the exhaust gas treating apparatus
- F01N2900/06—Parameters used for exhaust control or diagnosing
- F01N2900/16—Parameters used for exhaust control or diagnosing said parameters being related to the exhaust apparatus, e.g. particulate filter or catalyst
- F01N2900/1618—HC-slip from catalyst
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/14—Introducing closed-loop corrections
- F02D41/1401—Introducing closed-loop corrections characterised by the control or regulation method
- F02D2041/1433—Introducing closed-loop corrections characterised by the control or regulation method using a model or simulation of the system
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2200/00—Input parameters for engine control
- F02D2200/02—Input parameters for engine control the parameters being related to the engine
- F02D2200/08—Exhaust gas treatment apparatus parameters
- F02D2200/0811—NOx storage efficiency
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2200/00—Input parameters for engine control
- F02D2200/50—Input parameters for engine control said parameters being related to the vehicle or its components
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2200/00—Input parameters for engine control
- F02D2200/50—Input parameters for engine control said parameters being related to the vehicle or its components
- F02D2200/501—Vehicle speed
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/40—Engine management systems
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- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
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- Toxicology (AREA)
- Exhaust Gas After Treatment (AREA)
Description
リッチモード必要判断段階は、LNT触媒に吸着されたNOxの量をモデリングした値を基準として設定されたNOxファクターと、車速とギア段数を基準として設定された車速&ギアファクターと、を乗じて、所定のリッチ安全ファクターと比較してLNTリッチモードの必要可否を判断し、
NOxファクターは、LNT触媒が劣化していない通常の状態について定められたノーマルNOxファクターと、LNT触媒が劣化している状態について別途に定められたエイジドNOxファクターと、から構成され、車速&ギアファクターは、LNT触媒が劣化していない通常の状態について定められたノーマル車速&ギアファクターと、LNT触媒が劣化している状態について別途に定められたエイジド車速&ギアファクターと、から構成され、リッチモード必要判断段階では、前記劣化判断段階の結果によって、前記ノーマルNOxファクター又は前記エイジドNOxファクターのうちの一つと、前記ノーマル車速&ギアファクター又は前記エイジド車速&ギアファクターのうちの一つと、を選択し、これらを乗じて前記リッチ安全ファクターと比較することを特徴とする。
図1は、本発明による車両のLNT制御方法を説明したブロック図である
図1に示すように、本発明の車両のLNT制御方法の実施例は、LNT触媒の劣化有無を判断する劣化判断段階S10と、劣化判断段階S10の遂行結果、LNT触媒が劣化していると判断した場合に、劣化していない場合に比べて更に多い回数のリッチモードを実行するように判断するリッチモード必要判断段階S20と、を含んで構成される。
エンジンから排出されるNOxをモデリングしてLNT触媒に吸着されたNOxの量を計算し、このようなNOxの量に従って、図2に例示するようにNOxファクターを設定し、車速&ギアファクターも車速とギア段数に従って図3に例示したように設定して予め入力しておくのである。
図4に示すように、従来はLNT触媒の劣化の有無と関係なく、他の諸条件に従ってリッチモードに進入するか否かを決定したことにより、LNT触媒が劣化している状態では十分なNOx浄化を期待することができず、規制値を満足することができない場合が発生することがあり得た。これに備えるためにLNT触媒が劣化していない状態で不必要にリッチモード回数をふやすようにすれば、燃料の不必要な消耗により燃費に悪影響を与えるようになった。
本発明は、図4に例示されるように、LNT触媒が劣化した場合にはリッチモードを多く遂行してNOx規制値を満足することができるようにし、LNT触媒が劣化していない場合には、相対的に少ない回数のリッチモードを実行することにより車両の燃費向上に寄与することができるようにするものである。
S20 リッチモード必要判断段階
S30 最終決定段階
Claims (5)
- LNT触媒の劣化有無を判断する劣化判断段階と、
前記劣化判断段階の遂行結果、LNT触媒が劣化しているものと判断した場合に、劣化していない場合に比べて、更に多い回数のリッチモードを実行するように判断するリッチモード必要判断段階と、
を含み、
前記リッチモード必要判断段階は、LNT触媒に吸着されたNOxの量をモデリングした値を基準として設定されたNOxファクターと、車速とギア段数を基準として設定された車速&ギアファクターと、を乗じて、所定のリッチ安全ファクターと比較してLNTリッチモードの必要可否を判断し、
前記NOxファクターは、LNT触媒が劣化していない通常の状態について定められたノーマルNOxファクターと、LNT触媒が劣化している状態について別途に定められたエイジドNOxファクターと、から構成され、
前記車速&ギアファクターは、LNT触媒が劣化していない通常の状態について定められたノーマル車速&ギアファクターと、LNT触媒が劣化している状態について別途に定められたエイジド車速&ギアファクターと、から構成され、
前記リッチモード必要判断段階では、前記劣化判断段階の結果によって、前記ノーマルNOxファクター又は前記エイジドNOxファクターのうちの一つと、前記ノーマル車速&ギアファクター又は前記エイジド車速&ギアファクターのうちの一つと、を選択し、これらを乗じて前記リッチ安全ファクターと比較することを特徴とする車両のLNT制御方法。 - 前記リッチモード必要判断段階では、前記NOxファクターと前記車速&ギアファクターの積に、更に、LNT触媒の温度によって決められるLNT温度ファクターを乗じて前記リッチ安全ファクターと比較し、その比較結果、前記NOxファクター、前記車速&ギアファクター、及び前記LNT温度ファクターの積が前記リッチ安全ファクター以上になればLNTリッチモードが必要な状態と判断するように構成されたことを特徴とする請求項1に記載の車両のLNT制御方法。
- 前記NOxファクターは、吸着されたNOxの量が増加するに従って大きさが増加する傾向を有し、前記エイジドNOxファクターは、吸着されたNOxの量が増加するに従って、前記ノーマルNOxファクターに比べて更に大きさが増加する傾向に設定され、
前記車速&ギアファクターは、車速とギア段数が増加するに従って大きさが増加する傾向を有し、前記エイジド車速&ギアファクターは、車速とギア段数が増加するに従って、前記ノーマル車速&ギアファクターに比べて更に大きさが増加する傾向に設定されることを特徴とする請求項1に記載の車両のLNT制御方法。 - 前記リッチモード必要判断段階の遂行結果、LNTリッチモード実行が必要であると判断された場合に、大気圧、冷却水温、燃料温度、加速ペダル信号、及びエンジン運転領域のうち少なくとも一つ以上の条件を更に判断して、LNTリッチモードを実行するか否かを決定する最終決定段階を更に含んで構成されたことを特徴とする請求項1に記載の車両のLNT制御方法。
- 前記劣化判断段階では、LNT触媒の前端及び後端のラムダセンサの信号を利用してNOx還元に消費された還元剤の量と、スリップされる還元剤の量と、を検出してスリップ比を算出し、前記スリップ比が所定の臨界値を超過する場合にLNT触媒の劣化と判断することを特徴とする請求項1に記載の車両のLNT制御方法。
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KR1020120147882A KR101406495B1 (ko) | 2012-12-17 | 2012-12-17 | 차량의 lnt 제어방법 |
KR10-2012-0147882 | 2012-12-17 |
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DE102014224578A1 (de) * | 2014-12-02 | 2016-06-02 | Robert Bosch Gmbh | Verfahren und Einrichtung zum Betrieb eines Kraftstoffzumesssystems einer Brennkraftmaschine |
KR101703611B1 (ko) | 2015-09-15 | 2017-02-07 | 현대자동차 주식회사 | 린 녹스 트랩과 선택적 환원 촉매를 구비한 배기 가스 정화 장치에서 린 녹스 트랩의 재생 방법 및 배기 가스 정화 장치 |
US20180274464A1 (en) * | 2017-03-27 | 2018-09-27 | GM Global Technology Operations LLC | Motor vehicle including a lean nox trap regeneration system and method for regeneration |
KR102394630B1 (ko) | 2017-12-12 | 2022-05-06 | 현대자동차주식회사 | 엔진온도 연계방식 촉매퍼지제어 방법 및 차량 |
DE102018202458A1 (de) * | 2018-02-19 | 2019-08-22 | Robert Bosch Gmbh | Verfahren zur Überwachung eines Stickoxid-Speicherkatalysators |
KR102660502B1 (ko) * | 2019-04-18 | 2024-04-24 | 현대모비스 주식회사 | 자동차용 배터리 관리 방법 및 장치 |
CN114837783B (zh) * | 2021-06-18 | 2023-09-29 | 长城汽车股份有限公司 | 一种对lnt状态的检测方法、装置、电子设备及车辆 |
KR102576109B1 (ko) | 2021-11-05 | 2023-09-06 | 주식회사 현대케피코 | 엔진 시스템의 lnt 재생을 위한 제어 장치 및 방법 |
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DE19800665C1 (de) * | 1998-01-10 | 1999-07-01 | Degussa | Verfahren zum Betreiben eines Stickoxid-Speicherkatalysators |
JP4186259B2 (ja) * | 1998-07-17 | 2008-11-26 | 株式会社デンソー | 内燃機関の排ガス浄化装置 |
DE19843871B4 (de) * | 1998-09-25 | 2005-05-04 | Robert Bosch Gmbh | Diagnose eines NOx-Speicherkatalysators mit nachgeschaltetem NOx-Sensor |
DE10019245A1 (de) * | 1999-05-19 | 2000-11-30 | Ford Global Tech Inc | Verfahren und System zur Regelung des Regenerierzyklus eines Mager-NOx-Auffanggefässes |
JP3624815B2 (ja) * | 2000-02-18 | 2005-03-02 | トヨタ自動車株式会社 | 内燃機関の排気浄化装置 |
US6463733B1 (en) * | 2001-06-19 | 2002-10-15 | Ford Global Technologies, Inc. | Method and system for optimizing open-loop fill and purge times for an emission control device |
DE10202521A1 (de) * | 2002-01-24 | 2003-09-04 | Bayerische Motoren Werke Ag | Verfahren und Vorrichtung zum abgasnormkonformen Betreiben von NO¶x¶-Speicherkatalysatoren und zur Alterungsdiagnose derselben |
US7137252B2 (en) * | 2003-02-13 | 2006-11-21 | Jidosha Denki Kogyo Co., Ltd. | Variable nozzle control apparatus of turbocharger |
DE102004022814B4 (de) * | 2004-05-08 | 2010-06-10 | Audi Ag | Verfahren zum Betreiben einer magerlauffähigen Brennkraftmaschine eines Fahrzeuges, insbesondere eines Kraftfahrzeuges |
FR2879656B1 (fr) * | 2004-12-22 | 2007-04-13 | Peugeot Citroen Automobiles Sa | Systeme de declenchement d'une purge de moyens de depollution comportant un piege a nox |
FR2894286B1 (fr) * | 2005-12-01 | 2010-10-29 | Peugeot Citroen Automobiles Sa | Systeme de determination du niveau d'empoisonnement en soufre de moyens de depollution integres dans une ligne d'echappement d'un moteur de vehicule automobile. |
JP5022997B2 (ja) * | 2008-06-12 | 2012-09-12 | 本田技研工業株式会社 | 触媒の劣化判定装置 |
KR101500349B1 (ko) | 2009-12-04 | 2015-03-10 | 현대자동차 주식회사 | Lnt촉매의 열화 감지장치 및 방법 |
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2012
- 2012-12-17 KR KR1020120147882A patent/KR101406495B1/ko active IP Right Grant
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2013
- 2013-04-05 US US13/857,840 patent/US20140165538A1/en not_active Abandoned
- 2013-04-08 EP EP13162681.4A patent/EP2743484B1/en active Active
- 2013-04-10 JP JP2013082346A patent/JP6210704B2/ja not_active Expired - Fee Related
- 2013-05-10 CN CN201310173327.4A patent/CN103867271B/zh active Active
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CN103867271A (zh) | 2014-06-18 |
KR101406495B1 (ko) | 2014-06-27 |
US20140165538A1 (en) | 2014-06-19 |
CN103867271B (zh) | 2017-09-15 |
EP2743484A1 (en) | 2014-06-18 |
EP2743484B1 (en) | 2020-04-22 |
JP2014118965A (ja) | 2014-06-30 |
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