JP6208192B2 - 排気ガス処理装置 - Google Patents
排気ガス処理装置 Download PDFInfo
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- JP6208192B2 JP6208192B2 JP2015199917A JP2015199917A JP6208192B2 JP 6208192 B2 JP6208192 B2 JP 6208192B2 JP 2015199917 A JP2015199917 A JP 2015199917A JP 2015199917 A JP2015199917 A JP 2015199917A JP 6208192 B2 JP6208192 B2 JP 6208192B2
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- 238000012545 processing Methods 0.000 claims description 12
- 239000002184 metal Substances 0.000 claims description 11
- 239000000376 reactant Substances 0.000 claims description 8
- 238000000465 moulding Methods 0.000 claims description 6
- 238000002485 combustion reaction Methods 0.000 claims description 5
- 238000003466 welding Methods 0.000 claims description 5
- 239000003638 chemical reducing agent Substances 0.000 claims description 4
- 238000003780 insertion Methods 0.000 claims description 2
- 230000037431 insertion Effects 0.000 claims description 2
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- 230000002093 peripheral effect Effects 0.000 claims 1
- 239000007789 gas Substances 0.000 description 50
- 238000000034 method Methods 0.000 description 9
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 9
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical group N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 8
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 6
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 4
- 229910021529 ammonia Inorganic materials 0.000 description 4
- 238000011161 development Methods 0.000 description 4
- 230000018109 developmental process Effects 0.000 description 4
- 230000003197 catalytic effect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 229910052757 nitrogen Inorganic materials 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- WTHDKMILWLGDKL-UHFFFAOYSA-N urea;hydrate Chemical compound O.NC(N)=O WTHDKMILWLGDKL-UHFFFAOYSA-N 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 229910002092 carbon dioxide Inorganic materials 0.000 description 2
- 239000001569 carbon dioxide Substances 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 230000001419 dependent effect Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000004080 punching Methods 0.000 description 2
- 238000007493 shaping process Methods 0.000 description 2
- 238000005979 thermal decomposition reaction Methods 0.000 description 2
- 238000010531 catalytic reduction reaction Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
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- 230000005855 radiation Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Images
Classifications
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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
- F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
- F01N13/18—Construction facilitating manufacture, assembly, or disassembly
-
- 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
- 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
- F01N3/2066—Selective catalytic reduction [SCR]
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
- B01F25/40—Static mixers
- B01F25/42—Static mixers in which the mixing is affected by moving the components jointly in changing directions, e.g. in tubes provided with baffles or obstructions
- B01F25/43—Mixing tubes, e.g. wherein the material is moved in a radial or partly reversed direction
- B01F25/431—Straight mixing tubes with baffles or obstructions that do not cause substantial pressure drop; Baffles therefor
- B01F25/4316—Straight mixing tubes with baffles or obstructions that do not cause substantial pressure drop; Baffles therefor the baffles being flat pieces of material, e.g. intermeshing, fixed to the wall or fixed on a central rod
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
- B01F25/40—Static mixers
- B01F25/42—Static mixers in which the mixing is affected by moving the components jointly in changing directions, e.g. in tubes provided with baffles or obstructions
- B01F25/43—Mixing tubes, e.g. wherein the material is moved in a radial or partly reversed direction
- B01F25/431—Straight mixing tubes with baffles or obstructions that do not cause substantial pressure drop; Baffles therefor
- B01F25/43197—Straight mixing tubes with baffles or obstructions that do not cause substantial pressure drop; Baffles therefor characterised by the mounting of the baffles or obstructions
- B01F25/431974—Support members, e.g. tubular collars, with projecting baffles fitted inside the mixing tube or adjacent to the inner wall
-
- 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
- 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
- F01N3/24—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 constructional aspects of converting apparatus
- F01N3/28—Construction of catalytic reactors
- F01N3/2892—Exhaust flow directors or the like, e.g. upstream of catalytic device
-
- 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
- F01N2240/00—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being
- F01N2240/20—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being a flow director or deflector
-
- 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
- F01N2610/00—Adding substances to exhaust gases
- F01N2610/02—Adding substances to exhaust gases the substance being ammonia or urea
-
- 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
- F01N2610/00—Adding substances to exhaust gases
- F01N2610/14—Arrangements for the supply of substances, e.g. conduits
- F01N2610/1453—Sprayers or atomisers; Arrangement thereof in the exhaust apparatus
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Dispersion Chemistry (AREA)
- Exhaust Gas After Treatment (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
Description
Claims (10)
- 内燃機関の排気系統用の排気ガス処理装置であって、
排気ガス流路(3)が形成されたハウジング(2)と、
前記排気ガス流路(3)に沿って流れる排気ガス流に還元剤を注入するために前記ハウジング(2)に設けられたインジェクター(4)と、
反応物質と前記排気ガス流を相互混合するため前記ハウジング(2)に設けられたミキサー(7)とを備え、
前記ミキサー(7)は、前記排気ガス流が流れるミキサー断面空間(10)を囲む殻体(8)を備え、
前記ミキサー(7)は、前記殻体(8)の殻体内壁(12)から前記ミキサー断面空間(10)内部に向かって突出する複数のガイドブレード(11)を備え、
前記ミキサー(7)は、前記殻体(8)の殻体外表面(14)からそれぞれ外部に突出し、前記ハウジング(2)に形成されたストラップ孔(16)に挿通されてハウジング壁体(15)を貫通する複数のストラップ(13)を備え、
前記ミキサー(7)は、前記殻体(8)と、前記ガイドブレード(11)と、前記ストラップ(13)とを含む単体シートメタル片(20)から形成される成形シートメタル部材(19)として構成され、
前記ミキサー(7)はその殻体外表面(14)において、前記ハウジング壁体(15)の内壁(23)に形成された複数の支持部(22)を介して径方向に支持され、
前記支持部(22)はそれぞれ前記殻体(8)の円周方向にたがいに離間して配置され、
前記ストラップ(13)が前記ストラップ孔(16)に挿通されて形成された差し込み接続部と前記支持部(22)の箇所では、前記殻体外表面(14)と前記ハウジング内壁(23)とが接触し、当該箇所を除いて、径方向における前記殻体外表面(14)と前記ハウジング内壁(23)との間に空隙(24)が形成され、
前記支持部(22)はそれぞれ、前記ストラップ(13)の領域において、前記ハウジング壁体(15)から突出させた隆起部(25)として形成され、前記ストラップ(13)及び前記ストラップ孔(16)が前記支持部(22)内に位置し、前記支持部(22)の中央部において前記ストラップ(13)と前記ストラップ孔(16)とが係合している排気ガス処理装置。 - 前記ストラップ(13)はそれぞれ、前記ハウジング(2)に外部から溶接部(17)によって接合され、当該溶接部(17)はそれぞれ対応する前記ストラップ孔(16)を閉塞する請求項1に記載の排気ガス処理装置。
- 前記支持部(22)は隆起部(25)として、前記ハウジング壁体(15)のみまたは前記殻体(8)のみから、もしくは前記ハウジング壁体(15)と前記殻体(8)の双方から成形加工により一体的に形成される請求項1又は請求項2に記載の排気ガス処理装置。
- 前記ハウジング(2)は少なくとも前記ミキサー(7)を収容するハウジング断面(26)において二段殻体構造を有し、前記殻体外表面(14)が第1の円周部(30)において第1のハウジング殻体(27)に沿って延伸するとともに、第2の円周部(31)において第2のハウジング殻体(28)に沿って延伸している請求項1から請求項3のいずれか1項に記載の排気ガス処理装置。
- 前記支持部(22)はそれぞれ、前記第1のハウジング殻体(27)の領域と前記第2のハウジング殻体(28)の領域とに形成されている請求項4に記載の排気ガス処理装置。
- 少なくとも一つのストラップ孔(16)が、前記第1のハウジング殻体(27)および前記第2のハウジング殻体(28)にそれぞれ形成されている請求項4または請求項5に記載の排気ガス処理装置。
- 前記ミキサー(7)はその幅(32)がその高さ(33)より大きく形成され、前記ミキサー断面空間(10)が扁平形状とされている請求項1から請求項6のいずれか1項に記載の排気ガス処理装置。
- 前記ガイドブレード(11)は直線状にかつ互いに平行に形成されている請求項1から請求項7のいずれか1項に記載の排気ガス処理装置。
- 前記ガイドブレード(11)はそれぞれ、一端側が前記殻体(8)に固定され他端側が自立した形状となっている請求項1から請求項8のいずれか1項に記載の排気ガス処理装置。
- 流入側のミキサー領域(36)および/または流出側のミキサー領域(37)の前記殻体(8)は、たがいに対向して配置された第1の円周部(30)と第2の円周部(31)とを備え、
前記第1の円周部(30)は、該第1の円周部(30)から前記第2の円周部(31)に向かって突出する複数のガイドブレード(11)を備え、
前記第2の円周部(31)は、該第2の円周部(31)から前記第1の円周部(30)に向かって突出する複数のガイドブレード(11)を備え、
前記第1の円周部(30)の前記ガイドブレード(11)は、前記排気ガス流の流れ方向(35)において前記第2の円周部(31)の前記ガイドブレード(11)から位置をずらして配置されている請求項1から請求項9のいずれか1項に記載の排気ガス処理装置。
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102014222296.6A DE102014222296A1 (de) | 2014-10-31 | 2014-10-31 | Abgasbehandlungseinrichtung |
DE102014222296.6 | 2014-10-31 |
Publications (2)
Publication Number | Publication Date |
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JP2016089823A JP2016089823A (ja) | 2016-05-23 |
JP6208192B2 true JP6208192B2 (ja) | 2017-10-04 |
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ID=54360301
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Application Number | Title | Priority Date | Filing Date |
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JP2015199917A Active JP6208192B2 (ja) | 2014-10-31 | 2015-10-08 | 排気ガス処理装置 |
Country Status (5)
Country | Link |
---|---|
US (1) | US9765679B2 (ja) |
EP (1) | EP3015672B1 (ja) |
JP (1) | JP6208192B2 (ja) |
CN (1) | CN105569785B (ja) |
DE (1) | DE102014222296A1 (ja) |
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10179315B2 (en) | 2015-06-12 | 2019-01-15 | Donaldson Company, Inc. | Exhaust treatment device |
CN107461239A (zh) * | 2016-06-03 | 2017-12-12 | 天纳克(苏州)排放系统有限公司 | 混合腔组件 |
EP3379046B1 (en) * | 2017-03-24 | 2020-09-09 | Volvo Car Corporation | Exhaust gas aftertreatment system |
DE102018104599B4 (de) | 2018-02-28 | 2021-06-10 | Tenneco Gmbh | Niederdruck EGR-System mit Turbo-Bypass |
DE102019103780B4 (de) * | 2019-02-14 | 2024-01-25 | Friedrich Boysen Gmbh & Co. Kg | Mischer |
CN109931133A (zh) * | 2019-02-19 | 2019-06-25 | 北汽福田汽车股份有限公司 | 混合腔组件、尾气后处理装置和车辆 |
DE102019109983A1 (de) * | 2019-04-16 | 2020-10-22 | Eberspächer Exhaust Technology GmbH & Co. KG | Mischer |
BR112022000146A2 (pt) | 2019-07-11 | 2022-02-22 | Donaldson Co Inc | Disposições de conduto de dosagem para sistema de pós-tratamento de escape |
DE112019007549T5 (de) * | 2019-07-15 | 2022-04-07 | Cummins Emission Solutions Inc. | Systeme und Verfahren zum Bereitstellen eines gleichförmigen Abgasflusses gegenüber einer Nachbehandlungskomponente |
EP3792462A1 (en) | 2019-09-13 | 2021-03-17 | Donaldson Company, Inc. | Dosing and mixing assemblies for exhaust aftertreatment system |
DE102019128193A1 (de) * | 2019-10-18 | 2021-04-22 | Eberspächer Exhaust Technology GmbH | Mischeranordnung |
Family Cites Families (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3934805B2 (ja) * | 1998-11-18 | 2007-06-20 | 株式会社ユタカ技研 | 二通路排気管 |
GB0113226D0 (en) * | 2001-06-01 | 2001-07-25 | Nelson Burgess Ltd | Catalytic converter |
JP2005155404A (ja) * | 2003-11-25 | 2005-06-16 | Komatsu Ltd | 内燃機関の排気ガス浄化装置 |
DE102007021598B4 (de) * | 2007-05-08 | 2022-10-20 | Bayerische Motoren Werke Aktiengesellschaft | Vorrichtung zum Verteilen von fließfähigen Zusatzstoffen in Abgasanlagen |
DE102007048558A1 (de) * | 2007-10-09 | 2009-04-16 | Audi Ag | Statischer Mischer für eine Abgasanlage eines brennkraftmaschinenbetriebenen Fahrzeugs, insbesondere eines Kraftfahrzeugs |
EP2098697B2 (en) * | 2008-02-12 | 2015-05-20 | Magneti Marelli S.p.A. | Exhaust system of an internal combustion engine |
DE102008028626B4 (de) * | 2008-04-21 | 2011-05-19 | Heinrich Gillet Gmbh | Mischer |
US8939638B2 (en) * | 2008-04-21 | 2015-01-27 | Tenneco Automotive Operating Company Inc. | Method for mixing an exhaust gas flow |
DE102008054268B4 (de) * | 2008-10-31 | 2016-02-25 | Eberspächer Exhaust Technology GmbH & Co. KG | Misch- und/oder Verdampfungseinrichtung |
DE102009014433A1 (de) * | 2009-03-26 | 2010-09-30 | J. Eberspächer GmbH & Co. KG | Abgasbehandlungseinrichtung |
JP2011099359A (ja) * | 2009-11-04 | 2011-05-19 | Mitsubishi Fuso Truck & Bus Corp | 排気浄化装置用フィン装置 |
JP2011111927A (ja) * | 2009-11-25 | 2011-06-09 | Honda Motor Co Ltd | 内燃機関の排気浄化装置 |
KR101664494B1 (ko) * | 2010-07-08 | 2016-10-13 | 두산인프라코어 주식회사 | 요소 수용액과 엔진 배기가스의 혼합을 위한 정적 혼합기 |
DE102011077645A1 (de) * | 2011-06-16 | 2012-12-20 | Bosch Emission Systems Gmbh & Co. Kg | Statischer Mischer |
DE102011083636B4 (de) * | 2011-09-28 | 2016-11-10 | Eberspächer Exhaust Technology GmbH & Co. KG | Misch- und/oder Verdampfungseinrichtung |
WO2014025538A1 (en) * | 2012-08-10 | 2014-02-13 | Tenneco Automotive Operating Company Inc. | Method for mixing an exhaust gas flow |
DE102012016423B3 (de) * | 2012-08-21 | 2014-02-27 | Eberspächer Exhaust Technology GmbH & Co. KG | Abgasanlage mit Misch- und oder Verdampfungseinrichtung |
DE202012011764U1 (de) | 2012-12-07 | 2013-01-30 | Eberspächer Catem Gmbh & Co. Kg | Mischer zur Nachbehandlung von Abgasen |
-
2014
- 2014-10-31 DE DE102014222296.6A patent/DE102014222296A1/de not_active Withdrawn
-
2015
- 2015-10-08 JP JP2015199917A patent/JP6208192B2/ja active Active
- 2015-10-15 CN CN201510666822.8A patent/CN105569785B/zh active Active
- 2015-10-27 EP EP15191660.8A patent/EP3015672B1/de active Active
- 2015-10-30 US US14/927,599 patent/US9765679B2/en active Active
Also Published As
Publication number | Publication date |
---|---|
CN105569785A (zh) | 2016-05-11 |
US20160123212A1 (en) | 2016-05-05 |
CN105569785B (zh) | 2018-06-22 |
EP3015672B1 (de) | 2017-08-09 |
JP2016089823A (ja) | 2016-05-23 |
EP3015672A1 (de) | 2016-05-04 |
DE102014222296A1 (de) | 2016-05-04 |
US9765679B2 (en) | 2017-09-19 |
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