JP5628818B2 - フィルタにおける保留物を計測するシステムおよび方法 - Google Patents
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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
- F01N9/002—Electrical control of exhaust gas treating apparatus of filter regeneration, e.g. detection of clogging
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/06—Investigating concentration of particle suspensions
- G01N15/0606—Investigating concentration of particle suspensions by collecting particles on a support
- G01N15/0618—Investigating concentration of particle suspensions by collecting particles on a support of the filter type
-
- 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
- F01N2560/05—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics the means being a particulate sensor
-
- 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
- F01N2560/12—Other sensor principles, e.g. using electro conductivity of substrate or radio frequency
-
- 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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N2015/0042—Investigating dispersion of solids
- G01N2015/0046—Investigating dispersion of solids in gas, e.g. smoke
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N22/00—Investigating or analysing materials by the use of microwaves or radio waves, i.e. electromagnetic waves with a wavelength of one millimetre or more
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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
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- Y02T10/10—Internal combustion engine [ICE] based vehicles
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Description
本願は、米国仮特許出願第11/741,832号(2007年4月30日出願)の一部継続出願であり、この出願は米国仮特許出願第60/746,081号(2006年5月1日出願)の利益を主張し、これらの出願の開示は、その全体が本明細書に参考として援用される。
本発明は、フィルタ上の汚染物質目詰まり(loading)の決定に関し、より具体的には、目詰まりを決定するための無線周波数の使用に関する。
各モードiに対する同じ信号パラメータの偏差Deviが同様の場合、フィルタ24の目詰まりは均一である。しかしながら、各モードに対する同じ信号パラメータの偏差が、1つ以上のモードの偏差から有意に異なる場合、煤の目詰まりは不均一であり得る。
Am=fm(α1,α2,...,αn)
fm=Gm(α1,α2,...,αn)
Qm=Hm(α1,α2,...,αn)
であり、式中、(α1,α2,...,αn)は、種1、2、...、nの目詰まりである。異なる種は、概して、誘電率の実数部および虚数部の異なる値を有し(周波数シフトは大部分が誘電率の実数部に依存し、振幅比およびクオリティファクタは虚数部により依存する)、実数部および虚数部は、また、周波数と共に変動するので、Am、fmおよびQmの異なる量の依存性は、異なる種に対して異なる機能的依存性を有する。エキスパートシステムを使用する等、標準的な手段を介して、異種の内容の近似値を提供することが可能である。外部の較正は、逆アルゴリズムが要求され得る。信号の数が大きくなればなるほど、種の数は小さくなり、評価が改善される。成分の評価を向上するために、この方法と共に他の搭載された診断を使用することが可能である。
α2=Ψ(A1,A2...,Ap,f1,f2,...,fp,Q1,Q2,...,Qp)
…
αn=Z(A1,A2...,Ap,f1,f2,...,fp,Q1,Q2,...,Qp)
アルゴリズムはまた、予想および実際の目詰まりからの偏差の評価を提供することができる。図8および11に示されるように、1つ以上の共振モードの振幅、周波数、または幅等の他のパラメータが使用されてもよいが、一実施例において、目詰まりは、Qに対して反比例する。このため、式の形式は、代替的に以下であり得る。
α2=Ψ(A1,A2...,Ap,f1,f2,...,fP,1/Q1,1/Q2,...,1/QP)
…
αn=Z(A1,A2...,Ap,f1,f2,...,fP,1/Q1,1/Q2,...,1/QP)
さらに、以下の形式の式によって、各モードのキャビティ因子の依存性を決定することが有利である。
fm=Gm(α1,α2,...,αn)
1/Qm=H’m(α1,α2,...,αn)
アルゴリズムのこの行列の逆は、Hmを使用する一組の式を逆にするよりもロバストである。
Am=F* m(α1,α2,...,αn,β1,β2,...,βn,...,)
fm=G* m(α1,α2,...,αn,β1,β2,...,βn,...,)
1/Qm=H* m(α1,α2,...,αn,β1,β2,...,βn,...,)
となる。
Claims (14)
- 共振キャビティを形成する金属製容器内に含有されるフィルタの汚染物質目詰まり及び汚染物質空間分布を決定する方法にして、前記フィルタが第1誘電率を有し、前記汚染物質が前記第1誘電率とは異なる第2誘電率を有する方法であって、
複数のキャビティ共振モードを含むように該キャビティ内にマイクロ波エネルギーを確立するステップと、
前記複数のキャビティ共振モードにおいてキャビティマイクロ波応答の変化を監視するステップと、
前記複数のキャビティ共振モードの各々での前記キャビティマイクロ波応答の変化に基づいて、前記フィルタの前記汚染物質の目詰まりを決定するステップを含み、
前記フィルタの前記汚染物質の目詰まりを決定するステップが、前記フィルタの前記汚染物質の空間分布を決定することを含む、方法。 - 前記キャビティマイクロ波応答の変化は、前記複数のキャビティ共振モードのうちの1つのQの変化を含む、請求項1に記載の方法。
- 前記キャビティマイクロ波応答の変化は、前記複数のキャビティ共振モードのうちの1つの振幅の変化を含む、請求項1に記載の方法。
- 前記キャビティマイクロ波応答の変化は、前記複数のキャビティ共振モードのうちの1つの周波数の変化を含む、請求項1に記載の方法。
- 前記キャビティ共振モードと前記フィルタの前記汚染物質の前記空間分布の相関関係を構築するステップと、
前記相関関係に基づいて前記汚染物質の蓄積領域を決定するステップを更に含む、請求項1に記載の方法。 - 前記汚染物質の目詰まりに基づくフィルタ再生の開始のステップを更に含む、請求項1に記載の方法。
- 前記汚染物質が煤である請求項1に記載の方法であって、
前記複数のキャビティ共振モードの各々での前記キャビティマイクロ波応答の変化に基づいて前記フィルタ内の灰の量を決定するステップを更に含む、請求項1に記載の方法。 - 1つのアンテナが、反射モードで使用されることにより、前記キャビティへマイクロ波エネルギーを伝送し、前記キャビティからマイクロ波エネルギーを受信する、請求項1に記載の方法。
- 2つのアンテナが伝送モードで使用され、一方のアンテナは、前記キャビティへマイクロ波エネルギーを伝送し、他方のアンテナは、前記キャビティからマイクロ波エネルギーを受信する、請求項1に記載の方法。
- 前記2つのアンテナの各々が反射モードでも使用される、請求項9に記載の方法であって、
前記伝送アンテナ、前記受信アンテナ、および使用されるモードに基づく結合行列を作成するステップを更に含む、方法。 - フィルタの汚染物質目詰まり及び汚染物質空間分布を決定するシステムにして、その汚染物質が前記フィルタの第1誘電率とは異なる誘電率を有する、システムであって、
フローから前記汚染物質を除去するように適合されるフィルタと、
共振キャビティを形成する金属製容器であって、前記フィルタを収納する金属製容器と、
前記キャビティの複数の共振モードを包含するように周波数範囲内で信号を出力する信号発生装置と、
前記信号発生装置から前記キャビティの中へ前記信号を伝送する少なくとも1つのアンテナと、
前記キャビティから伝送された前記信号を受信する少なくとも1つのアンテナと、
前記受信した信号のパラメータを基準と比較し、当該比較に基づいて前記汚染物質の目詰まりを決定するように構成される制御装置を備え、
前記制御装置が、前記フィルタの前記汚染物質の空間分布も決定する、システム。 - 前記基準は、以前に受信された信号を含む、請求項11に記載のシステム。
- 前記基準は、記憶された値を含む、請求項11に記載のシステム。
- 前記パラメータは、振幅、周波数、およびクオリティファクタから成る群より選択される、請求項11に記載のシステム。
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US11096508P | 2008-11-03 | 2008-11-03 | |
US61/110,965 | 2008-11-03 | ||
PCT/US2009/062782 WO2010074812A1 (en) | 2008-11-03 | 2009-10-30 | System and method for measuring retentate in filters |
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EP (1) | EP2344732A4 (ja) |
JP (1) | JP5628818B2 (ja) |
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KR101775018B1 (ko) * | 2015-09-18 | 2017-09-19 | 세종공업 주식회사 | Dpf 재생시점 진단장치 |
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US8283930B2 (en) * | 2009-09-29 | 2012-10-09 | General Electric Company | Method and system for compensating for variation in attenuation measurements caused by changes in ambient temperature |
US9062576B2 (en) * | 2010-12-22 | 2015-06-23 | Caterpillar Inc. | Exhaust particulate filter system and operating method therefor |
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