JP4773517B2 - 煤を検出するためのセンサおよび作動方法 - Google Patents
煤を検出するためのセンサおよび作動方法 Download PDFInfo
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- 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
- G01N15/0656—Investigating concentration of particle suspensions using electric, e.g. electrostatic methods or magnetic methods
-
- 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
-
- 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
- F02D41/1438—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor
- F02D41/1444—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases
- F02D41/1466—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases the characteristics being a soot concentration or content
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
- G01N27/04—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance
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Description
Claims (20)
- 煤検出センサにおいて、
測定ガスに晒される非導電性の表面をもつセラミック基板(1)と、
該基板の表面に形成され導電性を測定する複数の電極(3)を備えた電極構造体と、
前記基板に取り付けられ250°C〜450°Cの動作温度を生じさせる加熱素子(2)と、
少なくとも1つの温度測定装置が設けられており、
前記複数の電極(3)の間における導電性を測定することにより、発生した煤の堆積が検出され、
互いに接触状態にはない複数の導電性粒子が、前記基板表面において前記複数の電極(3)間にまえもって付着されており、該複数の導電性粒子により、前記基板表面において前記複数の電極(3)間の非導電性区間の全長が低減されることを特徴とする、
煤検出センサ。 - 請求項1記載のセンサにおいて、
前記基板表面は煤燃焼のための触媒特性を有することを特徴とするセンサ。 - 請求項1または2記載のセンサにおいて、
前記複数の電極は交差指型に配置されていることを特徴とするセンサ。 - 請求項1から3のいずれか1項記載のセンサにおいて、
少なくとも1つの第2の同種のセンサと同時に使用するように構成されていることを特徴とするセンサ。 - 請求項1から4のいずれか1項記載のセンサにおいて、
安定性を高めるため前記電極は薄い層または細かい多孔性の層により覆われていることを特徴とするセンサ。 - 請求項1から5のいずれか1項記載のセンサにおいて、
前記セラミック基板に電気的に良好な絶縁性の層が付加的に設けられており、該層は同時に排気ガスに対し耐性があることを特徴とするセンサ。 - 請求項1から6のいずれか1項記載のセンサにおいて、
前記基板または該基板の上に取り付けられた電気的に高い絶縁性の層の上に、酸化触媒が分散液としてばらばらの領域にコーティングされていることを特徴とするセンサ。 - 請求項1から7のいずれか1項記載のセンサにおいて、
前記加熱素子は同時に温度センサとして作動されることを特徴とするセンサ。 - 請求項1から8のいずれか1項記載のセンサにおいて、
前記加熱素子および/または前記温度センサは、表面実装の場合には保護層によって覆われ、または多層構造の場合にはセンサ基体内部に取り付けられていることを特徴とするセンサ。 - 請求項1から9のいずれか1項記載のセンサにおいて、
前記基板表面または該基板表面の上に設けられた層はまえもって定められた基本導電率を有し、該導電率により、前記基板表面に煤が堆積していないときの抵抗値が規定されていることを特徴とするセンサ。 - 請求項1から10のいずれか1項記載の煤検出センサの作動方法において、
測定フェーズのためにセンサにおいて第1の動作温度を生じさせて、基板表面上に煤を堆積させることができるが煤測定を妨害する他の堆積を阻止するステップと、
測定開始から複数の電極間の導電性が上昇するまでの時間を測定するステップと、
再生フェーズのためにセンサにおいて第2の動作温度を生じさせて、堆積した煤を測定ガス中に存在する酸素とともに燃やすステップが設けられていることを特徴とする、
煤検出センサの作動方法。 - 請求項11記載の方法において、
少なくとも2つのセンサを使用して、互いに逆の動作を交互に行わせることにより少なくとも1つのセンサが測定フェーズにおかれることを特徴とする方法。 - 請求項11または12記載の方法において、
前記第1の動作温度は250〜450°Cの間にあることを特徴とする方法。 - 請求項11または13記載の方法において、
前記第2の動作温度は500〜800°Cの範囲にあることを特徴とする方法。 - 請求項11から14のいずれか1項記載の方法において、
前記第1の温度の選定により、基板表面における水分、酸化窒素または二酸化硫黄の堆積が阻止されることを特徴とする方法。 - 請求項11から15のいずれか1項記載の方法において、
前記測定フェーズの時間は30〜300秒の範囲にあり、前記再生フェーズの時間は10〜40秒の範囲にあることを特徴とする方法。 - 請求項1から10のいずれか1項記載の煤検出センサの作動方法において、
センサにおいて一定の動作温度を生じさせ、煤を基板表面に堆積させて導電率を高め、基板表面におけるまえもって定められた触媒活性度により煤成分の継続的な燃焼を行わせるステップと、
発生した導電性に基づき測定信号を形成するステップが設けられていることを特徴とする、
煤検出センサの作動方法。 - 請求項17記載の方法において、
前記一定の動作温度は350〜500°Cの間にあることを特徴とする方法。 - 請求項17または18記載の方法において、
温度制御により導電率を一定に保持したときの温度変化に基づき、発生した煤の堆積を測定することを特徴とする方法。 - 請求項17から19のいずれか1項記載の方法において、
前記基板表面は、該基板表面に煤が堆積していないときに規定の抵抗値を有しており、該抵抗値に基づき自己監視を行うためのセンサ機能が設けられることを特徴とする方法。
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102005030134.7 | 2005-06-28 | ||
DE102005030134A DE102005030134A1 (de) | 2005-06-28 | 2005-06-28 | Sensor und Betriebsverfahren zur Detektion von Ruß |
PCT/EP2006/063570 WO2007000446A1 (de) | 2005-06-28 | 2006-06-27 | SENSOR UND BETRIEBSVERFAHREN ZUR DETEKTION VON RUß |
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JP2008547032A JP2008547032A (ja) | 2008-12-25 |
JP4773517B2 true JP4773517B2 (ja) | 2011-09-14 |
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JP2008518813A Expired - Fee Related JP4773517B2 (ja) | 2005-06-28 | 2006-06-27 | 煤を検出するためのセンサおよび作動方法 |
Country Status (7)
Country | Link |
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US (1) | US8033159B2 (ja) |
EP (1) | EP1896838B1 (ja) |
JP (1) | JP4773517B2 (ja) |
KR (1) | KR101279746B1 (ja) |
CN (1) | CN101208597B (ja) |
DE (1) | DE102005030134A1 (ja) |
WO (1) | WO2007000446A1 (ja) |
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DE102006040351A1 (de) * | 2006-08-29 | 2008-03-06 | Robert Bosch Gmbh | Sensor zur resistiven Bestimmung von Konzentrationen leitfähiger Partikel in Gasgemischen |
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CN101208597B (zh) | 2011-12-14 |
US20090126458A1 (en) | 2009-05-21 |
KR20080031033A (ko) | 2008-04-07 |
WO2007000446A1 (de) | 2007-01-04 |
DE102005030134A1 (de) | 2007-01-04 |
JP2008547032A (ja) | 2008-12-25 |
CN101208597A (zh) | 2008-06-25 |
EP1896838A1 (de) | 2008-03-12 |
KR101279746B1 (ko) | 2013-06-27 |
EP1896838B1 (de) | 2018-01-10 |
US8033159B2 (en) | 2011-10-11 |
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