EP1601943A1 - Detecteur optique auto-nettoyeur - Google Patents

Detecteur optique auto-nettoyeur

Info

Publication number
EP1601943A1
EP1601943A1 EP04719345A EP04719345A EP1601943A1 EP 1601943 A1 EP1601943 A1 EP 1601943A1 EP 04719345 A EP04719345 A EP 04719345A EP 04719345 A EP04719345 A EP 04719345A EP 1601943 A1 EP1601943 A1 EP 1601943A1
Authority
EP
European Patent Office
Prior art keywords
sensor
heating
combustion chamber
tip
lens
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.)
Withdrawn
Application number
EP04719345A
Other languages
German (de)
English (en)
Inventor
Dieter Karst
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kistler Holding AG
Original Assignee
Kistler Holding AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Kistler Holding AG filed Critical Kistler Holding AG
Publication of EP1601943A1 publication Critical patent/EP1601943A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M15/00—Testing of engines
    • G01M15/04—Testing internal-combustion engines
    • G01M15/10—Testing internal-combustion engines by monitoring exhaust gases or combustion flame

Definitions

  • the invention relates to an optical sensor for detecting the light intensity of combustion processes in a combustion chamber.
  • Optical sensors are used in combustion engines, for example in gasoline engines or diesel engines, to examine the combustion.
  • the temporal recording of the light intensity in a combustion chamber provides important data as boundary conditions for computer models, since the temperature can be inferred from the light intensity.
  • the soot concentration in the combustion chamber can be inferred when determining the light intensity. Due to the increasingly strict regulations of exhaust gas legislation, great efforts are being made to reduce the formation of soot during combustion in engines. Optical sensors provide valuable data for these developments.
  • optical sensors which have a detection angle of up to 130 ° and such a small diameter that they can be installed in a spark plug or glow plug.
  • the object of the present invention is to describe an optical sensor for detecting combustion processes in a combustion chamber, which is not impaired by soot deposits on the side facing the combustion chamber.
  • Fig. 1 shows an embodiment of an optical sensor according to the invention
  • FIG. 2 shows a detailed view of a sensor tip of an optical sensor according to the invention
  • This sensor 1 shows an optical sensor 1.
  • This sensor 1 has one or more lenses 2 on the side facing the combustion chamber 7.
  • the light incident through the lenses 2 is passed on by means of a light guide running in the center of the sensor 1 and then processed for evaluation.
  • the foremost surface of the lens 2 of the sensor 1 is soiled during a measurement by soot from the combustion chamber 7.
  • This exemplary embodiment according to the invention has a heater 4 at the tip of the sensor 1, in the area of the foremost lens 2.
  • the invention consists in that the sensor tip can be heated by means of this heater 4 to a temperature at which the soot is burned on the foremost lens 2. As a result, the sensor 1 can remain clean and functional for the entire desired measuring period.
  • the heater 4 consists of a heating coil.
  • a temperature sensor 6 attached to sensor 1 is used for temperature control.
  • FIG. 2 shows the tip of an exemplary embodiment according to the invention of an optical sensor 1 with lenses 2 and with the subsequent light guide 3.
  • the invention described here can also be used with other optical sensors. This figure is not intended to be limiting.
  • the heating wire 4 was wound several times around the lenses 2. Windings between 1 and 8 turns, in particular 2 to 4 turns, are preferred. A heating wire 4 with a cross section between 0.25 and 1 mm is preferably used.
  • the power with which the heating wire 4 is heated is preferably between 10 and 70 watts, in particular between 15 and 40 watts.
  • the heater 4 is brought to the desired temperature before use of a measurement, which is necessary to keep the surface of the foremost lens 2 always clean.
  • the temperature required for this is about 400 ° C, preferably about 600 ° C at the sensor tip. Soot, which would settle on the surface of the foremost lens 2, is immediately burned at these temperatures.
  • the heating system ensures a clean lens 2 during the entire measurement and therefore reliable measurements in this regard.
  • the required heating can also be generated by supplying energy in the form of electromagnetic waves. This energy can be generated by a laser, for example.
  • the light can be directed onto the lens via the light guide 3. Deposits on the lens 2 absorb the incident energy and are burned as a result.
  • One difference of this arrangement is that the heater cannot be in operation during the measurement. The measurement must therefore be interrupted and cleaned again after sooting again.
  • lines or channels can be provided next to the lenses, which are filled with a fluid.
  • This fluid is heated to the desired temperature in a suitable manner and brought to the sensor tip in lines or channels provided for this purpose. The release of heat in this area of the sensor tip in turn causes the soot to be burned on the foremost lens.
  • the advantage of heating the sensor tip is that the measurement can be carried out at any operating point, irrespective of the degree of sooting, especially in the case of diesel engine combustion. Another advantage is that no complex calibration has to be carried out and that the sensor does not have to be removed.
  • heating e.g. heating coil

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Photometry And Measurement Of Optical Pulse Characteristics (AREA)
  • Testing Of Engines (AREA)
  • Combined Controls Of Internal Combustion Engines (AREA)
  • Radiation Pyrometers (AREA)
  • Control Of Combustion (AREA)

Abstract

L'invention concerne un détecteur optique (1) pour la détection de l'émission lumineuse de processus de combustion dans un espace de combustion (7), présentant au moins une lentille (2) à la pointe du détecteur, tournée vers ledit espace de combustion. La surface avant du détecteur (1) est encrassée, lors d'une mesure, par la suie provenant de l'espace de combustion (7). Le détecteur (1) selon l'invention présente, en pointe, dans la zone de la lentille avant (2), des moyens de chauffage (4). Grâce à l'invention, la pointe du détecteur peut être chauffée par lesdits moyens de chauffage (4), et portée à une température à laquelle la suie sur la lentille avant (2) est brûlée. De cette façon, le détecteur (1) reste propre et apte à fonctionner pendant toute la durée voulue de la mesure.
EP04719345A 2003-03-13 2004-03-11 Detecteur optique auto-nettoyeur Withdrawn EP1601943A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
CH4162003 2003-03-13
CH4162003 2003-03-13
PCT/CH2004/000142 WO2004081511A1 (fr) 2003-03-13 2004-03-11 Detecteur optique auto-nettoyeur

Publications (1)

Publication Number Publication Date
EP1601943A1 true EP1601943A1 (fr) 2005-12-07

Family

ID=32968390

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04719345A Withdrawn EP1601943A1 (fr) 2003-03-13 2004-03-11 Detecteur optique auto-nettoyeur

Country Status (4)

Country Link
US (1) US7375314B2 (fr)
EP (1) EP1601943A1 (fr)
JP (2) JP4980050B2 (fr)
WO (1) WO2004081511A1 (fr)

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JP5012689B2 (ja) * 2008-06-24 2012-08-29 株式会社デンソー 自動洗浄式光センサ
JP2010008077A (ja) * 2008-06-24 2010-01-14 Denso Corp 自動洗浄式光センサ
US8648322B2 (en) * 2008-10-31 2014-02-11 Cummins Inc. Optical sensing in an adverse environment
US9194273B2 (en) 2008-10-31 2015-11-24 Cummins Inc. Apparatus, system, and method for aftertreatment control and diagnostics
DE102010003413B4 (de) * 2010-03-29 2016-12-22 Von Ardenne Gmbh Verfahren zur Reinigung eines optischen Positionsmesssystems, optisches Positionsmesssystem und Beschichtungsanlage
US8218147B2 (en) 2010-06-18 2012-07-10 Cummins Inc. Apparatus, system, and method for detecting engine fluid constituents
DE102011112698A1 (de) 2011-06-21 2012-12-27 Von Ardenne Anlagentechnik Gmbh Optische Kontrolle für die Vakuumbehandlung
US9417122B2 (en) 2012-06-15 2016-08-16 Empire Technology Development Llc Self-cleaning lens
US9816915B2 (en) 2013-10-11 2017-11-14 Fireye, Inc. Couplings for flame observation devices
CN104864411B (zh) * 2015-03-17 2017-06-23 厦门奥普拓自控科技有限公司 一种层燃锅炉熄灭界限的智能检测系统
EP3107156B1 (fr) 2015-06-16 2018-04-18 Kistler Holding AG Dispositif de demontage d'un cable, procede de demontage d'un cable a l'aide du dispositif de demontage et cable utilise dans le procede

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DE2905506A1 (de) * 1979-02-14 1980-09-04 Bosch Gmbh Robert Zuendbeginnsensor, insbesondere bei brennkraftmaschinen
US4358952A (en) * 1980-03-26 1982-11-16 Robert Bosch Gmbh Optical engine knock sensor
US4409815A (en) * 1980-11-11 1983-10-18 Robert Bosch Gmbh Combustion process sensor arrangement
US4419212A (en) * 1981-02-07 1983-12-06 Robert Bosch Gmbh Combination gas oxygen concentration and combustion light sensor
US4412446A (en) * 1981-03-20 1983-11-01 Robert Bosch Gmbh Optical combustion sensor, particularly for use with internal combustion engines
DE3321028A1 (de) * 1982-06-17 1983-12-22 Smiths Industries Public Ltd. Co., London Optisches bauteil
US4572119A (en) * 1983-04-28 1986-02-25 Toyota Jidosha Kabushiki Kaisha Ignition timing sensor for diesel engine
JPS59201934A (ja) * 1983-04-28 1984-11-15 Toyota Motor Corp 着火時期センサの付着物除去装置
JPS59221468A (ja) * 1983-05-31 1984-12-13 Toyota Motor Corp デイ−ゼルエンジンの燃焼光検出装置異常時復帰処理方法
JPS6022116A (ja) * 1983-07-18 1985-02-04 Fuji Xerox Co Ltd 光センサの汚れ清掃装置
JPS62234887A (ja) * 1986-04-04 1987-10-15 株式会社日立製作所 汚損抑止式燃焼センサ
JPS6345497A (ja) * 1986-08-12 1988-02-26 Kubota Ltd 空気混入式揚砂装置の空気吸込方法
JPS6345467A (ja) * 1986-08-13 1988-02-26 Hitachi Ltd 燃焼炎検出機能付点火装置
JPS63118623A (ja) * 1986-11-07 1988-05-23 Nippon Soken Inc 着火時期センサ
JPH0194237A (ja) * 1987-10-06 1989-04-12 Mazda Motor Corp エンジンの燃焼検出装置
JP2595629B2 (ja) * 1988-03-10 1997-04-02 トヨタ自動車株式会社 着火時期センサ
JPH0794814B2 (ja) * 1989-03-18 1995-10-11 株式会社日立製作所 エンジンの点火制御装置
AT2910U1 (de) * 1998-07-09 1999-06-25 Avl List Gmbh Optoelektronische messeinrichtung zur erfassung von verbrennungsvorgängen
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See also references of WO2004081511A1 *

Also Published As

Publication number Publication date
JP2006526142A (ja) 2006-11-16
WO2004081511A1 (fr) 2004-09-23
JP4980050B2 (ja) 2012-07-18
US7375314B2 (en) 2008-05-20
US20070068495A1 (en) 2007-03-29
JP2012150119A (ja) 2012-08-09

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