• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    An improved lambda sensor is disclosed for the measurement of the oxygen content in the exhaust gas of internal combustion engines in which the sensor element is provided with a gas permeable wrapping coated with a catalyst. The sensor delivers a clear well defined signal in the so-called rich exhaust gas, which makes possible a more precise adjustment of the fuel-air mixture fed to the internal combustion engine.
    公开号:SU1080761A3
    申请号:SU802931102
    申请日:1980-06-05
    公开日:1984-03-15
    发明作者:Боцон Альфред；Коберштайн Эдгар；Плетка Ханс-Дитер；Фелькер Херберт
    申请人:Дегусса Аг (Фирма)；
    IPC主号:
    专利说明:

    2. The probe according to claim 1, is distinguished by the fact that the measuring sensor or the protective jacket surrounding it is provided with openings and is surrounded by layers of sieve cloth made of descaling heat-resistant steel coated with a catalyst-impregnated material.
    3. A probe according to Claim 2, characterized in that the catalyst material is deposited on the sieve cloth.
    f. Probe pop 2 characterized in that the catalyst material is deposited on the intermediate layer of metal oxide required for catalysis, placed on the sieve fabric.
    5. Probe according to claim 4, characterized in that the intermediate layer required for catalysis is made of active alumina.
    6. The probe on PP. 2-5, characterized in that the platinum group metals are used as the catalyst material.
    7. Probe on PP. 1-6, characterized in that the platinum group metals in combination with non-precious metals are used as the catalyst material.
    8. Probe on PP. 6-7, characterized in that the platinum (rhodium) composition is used as the catalyst material.
    9. Probe nos. 6-8, characterized in that the platinum (rhodium) -aluminum composition is used as the catalyst material.
    10. The probe on PP. 1-9, characterized in that the shell is made of stainless steel containing aluminum.
    11. Probe according to claims 1-10, characterized in that the shell consists of an alloy containing iron, chromium, aluminum, in the following proportions, by weight%:
    Chrome13-15
    Aluminum 3.5-5 Iron Else
    The invention relates to probes for measuring the oxygen content in the exhaust gas of an internal combustion engine, which allows to obtain the exact signal necessary for good control of the mixture.
    A probe is known for measuring the oxygen content in the exhaust gas of an internal combustion engine, containing solid electrolyte and measuring electrodes ij.
    This device is characterized by insufficient measurement accuracy.
    The closest fto of the technical invention to the invention is an e .® probe for measuring the oxygen content in the exhaust gas of internal combustion engines, containing an electrolyte measuring sensor with solid electrolyte, ignited by exhaust gas and serving as an electrical signal generator of the probe. .
    The disadvantage of the sensor is that it does not provide sufficient
    measurement accuracy in the analysis of exhaust gas internal combustion engines.
     The purpose of the invention is to increase the measurement accuracy.
    The goal is achieved by the fact that in the probe for measuring the oxygen content in the exhaust gas of internal combustion engines containing a gas washed by a cotton gas and serving as a generator electric signal of a probe, a solid electrolyte measuring sensor is placed in the protective jacket surrounding it, the measuring sensor is equipped with a non-contacting with it, a catalytically active multilayer gastight shell. Moreover, the enveloping protective jacket is provided with holes and is surrounded by layers of sieve cloth from purified scale of heat-resistant steel coated or impregnated with a catalyst material; or the catalyst material is deposited on the sieve cloth; - or the catalyst material is deposited on the intermediate metal oxide layer needed for catalysis, placed on the sieve cloth, and the intermediate layer necessary for catalysis is made of active alumina; moreover, platinum group metals are used as the catalyst material; or as a catalyst material, platinum troupe metals were used in combination with base metals; or platinum (rhodium) composition was used as a catalyst material; or as a catalyst material used composition of platinum frodi) -aluminum; and the shell is made of an alloy of stainless steel containing aluminum. In addition, the shell consists of an alloy of containing iron, chromium, aluminum in the following quantitative ratios, may.%: Chrom13-15 Aluminum 3.5-5. Iron Else The drawing shows a probe for measuring the oxygen content in the exhaust gas of internal combustion engines. In probe body 1, which is screwed like a candle into a cutting hole, in the exhaust gas channel, there is a solid zirconia electrolyte 2 covered in a gun and inside with platinum and a spinel protective layer that covers a cylindrical heat-resistant metal 3 jacket. Adjacent to the longitudinal part of the protective jacket, three layers of sieve cloth 4 are wound one on another from scaled heat-resistant steel, coated or impregnated with catalyst material. The sieve fabric can be made of wire with a diameter of 0.07 mm and 0.1 ”holes, all of which are covered with a catalyst material. In the integral material of the protective sheath and the head of the probe 1, a pin 6 is drilled in the middle. A pin 6 drilled in the middle is laid over it Stainless steel, heat-resistant metal, which covers layers of sieve 4 at the other inner end. The cap is screwed to the probe head; a nut 7. Directly to the thread of the plug of the probe body 1 a holder 8 is attached, to cover the upper end of the sieve fabric 4 layers. The probe works as follows. Multicomponent catalysts, most often three-component catalysts, are used to neutralize the exhaust gases of internal combustion engines. These three-component catalysts have the ability to simultaneously oxidize harmful substances with CO, HC, and NO in a certain area of the composition of the exhaust gases. In order to maintain this composition of exhaust gases in automobiles, catalysts are used together with a controlled carburetor for gas cleaning. In this case, using the probe to measure the oxygen content in the exhaust gas of the internal combustion engines, the so-called β-probe, determine the content of Oj in the exhaust gases. With the help of the probe, a voltage up to 800 mV corresponding to the oxygen pressure of the exhaust gases is obtained. This voltage is enhanced and controlled through the regulator by the formation of a mixture in the carburetor, the regulation is carried out in such a way that the composition of the injected gases of the mixture within the narrowest limits always makes possible the optimal, simultaneous sour. CO, PS and NO2. Catalyst material can be deposited directly on the shell or on the intermediate layer of metal oxide required for the catalyst, which in turn is applied to the shell. In the case of a particularly advantageous embodiment of the invention, an intermediate layer of transition alumina necessary for catalysis is used. This alumina may contain additional additives of oxides of cerium, zirconium, iron, nickel, tin, zinc, molybdenum, rare earth elements, as well as calcium, strontium and barium, or a mixture of these elements. The transitional alumina should be understood as active, i.e. alumina required for catalysis, which may contain the following phases which can be determined crystallographically 2-,., J-Q or X or. With the improvement in accordance with the invention of conventional oxygen measuring probes, a simple and cheap way to improve the system of a controlled mixture of internal combustion engines is shown by the ratio of regulation. By precise regulation, along with fuel economy, a significantly better emission value is achieved first of all, since the three-component optimum operating point: The catalyst used in the system can be more precisely provided. Another advantage is that the shell is coated with aluminum oxide or another substance with a high surface activity simultaneously acts as a filter and protects the measuring sensor - probe from contamination by combustion products. This allows an increase in the duration of operation from existing at the present time. The catalyst material may consist of platinum group metals, if appropriate in combination with adverse metals such as aluminum or nickel. Platinum group metals include platinum, ruthenium, palladium, iridium and rhodium, mixtures or additives to these mixtures, for example, platinum-palladium, platinum-rhodium / platinum / palladium / rhodium, platinum / iridium, platinum-pal- chadium iridium. Preferred are platinum-rhodium or platinum / rhodium / aluminum. If a lot of catalyst materials are used, they can be separated or simultaneously deposited on a carrier. The amount of platinum group metal as a catalytically active element in the shell of the probe should not exceed 15% by weight for economic reasons and may be 0.01-12% by weight, preferably 110% by weight. If a component of the platinum group of the shell contains more than one such metal, then the weight ratio between platinum and ordinary metals of the platinum group of this component lies in the range from 1: 3 to 20 :. The amount of one or more common metals in total can be several times more than the amount of platinum group metal. The application of catalytically active components on the skeleton of the base metal of the sieve can be carried out using known methods, for example by impregnation. It is also possible to precipitate a noble metal by electroplating on a metal surface or to evaporate it on a metal surface. As a material for the probe sheath, a non-scale, heat-resistant stainless steel alloy containing aluminum was a sieve. Such materials consist of an alloy containing, for example, iron, chromium, aluminum, and in the corresponding case cerium lux yttrium. The amplitude values of the signals mV for a known zone (A) and for a probe (C) are represented in accordance with the invention, where} 1 is the interval that is the same for both probes. The amplitude of the signal in mV of the normal probe (A) and the probe improved (in accordance with the invention (example 2) probe (C) Probe A Probe C and, 9755 20590 0.9876 70660 1.0028 250640 1.0112 270630 1.0213 320600 In the case of a probe (C) in accordance with the invention, there is also a clear advantage in comparison with conventional (known) -oxygen measuring probes. But the difference here is pronounced and the amplitude of the probe signal (C) can be viewed throughout the entire interval as linearly variable, hence providing the best signal for optimal control of the system, which is necessary for forming a mixture of internal combustion engines.
    权利要求:
    Claims (11)
    [1]
    1. PROBE FOR MEASURING OXYGEN CONTENT IN EXHAUST GAS OF INTERNAL COMBUSTION ENGINES, containing a measuring probe with solid electrolyte washed by the exhaust gas and serving as a probe electric signal generator, placed in a protective jacket covering it distinguishing with the fact that, in order to increase the accuracy of measurement, the measuring sensor is equipped with a catalytically active multilayer gas-tight shell non-contacting it.
    In ή
    zzzzi
    SU < i , 1080761
    [2]
    2. The probe according to π. 1, it is distinguished by the fact that the measuring sensor or the protective jacket covering it is provided with openings and surrounded by layers of sieve cloth of scale-free heat-resistant steel coated with impregnated catalytic material.
    [3]
    3. The probe according to p. 2, characterized in that the catalyst material is deposited on the shell of the sieve fabric.
    [4]
    4. Probe pop. 2 L, characterized in that the catalyst material is deposited on the intermediate layer of metal oxide necessary for catalysis, placed on a sieve cloth. '
    [5]
    5. Probe pop. 4, characterized in that the intermediate layer necessary for catalysis is made of active alumina.
    [6]
    6. The probe according to paragraphs. 2-5, characterized in that the platinum group metals are used as the catalyst material.
    [7]
    7. The probe according to paragraphs. 1-6, characterized in that the platinum group metals in combination with base metals are used as the catalyst material.
    [8]
    8. The probe according to paragraphs. 6-7, characterized in that the composition of platinum (rhodium) is used as the catalyst material.
    [9]
    9. Probe ίο pp, 6-8, characterized in that the composition of platinum (rhodium) -aluminium is used as a catalyst material.
    [10]
    10. The probe according to paragraphs. 1-9, characterized in that the shell is made of stainless steel containing aluminum.
    [11]
    11. The probe according to claims 1 to 10, characterized in that the shell consists of an alloy containing iron, chromium, aluminum, in the following quantitative proportions, wt.%:
    Chrome 13-15
    Aluminum 3,5-5
    Iron Else
    类似技术:
    公开号 | 公开日 | 专利标题
    SU1080761A3|1984-03-15|Probe for measuring oxygen content of exhaust gas of interal combustion engine
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    US4957896A|1990-09-18|Catalyst for purification of exhaust gases
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    WO1999014584A1|1999-03-25|Gas sensor
    EP0019731A1|1980-12-10|Polarographic sensor for the determination of the oxygen content in gases, especially in exhaust gases of internal-combustion engines
    DE4432749B4|2005-06-23|Oxygen concentration detector and method for its production
    RU97111884A|1999-06-10|METHOD FOR MEASURING GAS CONCENTRATION IN A GAS MIXTURE, AND ALSO AN ELECTROCHEMICAL SENSITIVE ELEMENT FOR DETERMINING GAS CONCENTRATION
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    EP0923724B1|2005-12-28|Measuring arrangement for the determination of gas components in gas mixtures
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    DE102004015783A1|2005-10-06|Sensor for determining the oxygen concentration in the exhaust gas of internal combustion engines
    EP0589169B1|1996-02-21|Device to monitor the operation of exhaust gas catalytic converters
    JPS61207961A|1986-09-16|Oxygen sensor
    Summers et al.1979|Modes of catalyst deactivation in stoichiometric automobile exhaust
    US20030011374A1|2003-01-16|Sensor for the monitoring of an NOx catalyst
    JPH05322844A|1993-12-07|Hydrogen carbide concentration measuring method and device
    Shi-Yao et al.1996|Study on non-noble metal catalysts for automotive emission control
    DE3938056C2|1994-11-10|Oxygen sensor
    US11255812B2|2022-02-22|Gas sensor element, heater and gas sensor
    同族专利:
    公开号 | 公开日
    SE449794B|1987-05-18|
    US4362605A|1982-12-07|
    CA1150355A|1983-07-19|
    DE2937802C2|1987-02-19|
    JPS56100355A|1981-08-12|
    PL226809A1|1981-05-22|
    DD152997A5|1981-12-16|
    FR2465878A1|1981-03-27|
    IT1128943B|1986-06-04|
    GB2059072B|1983-10-19|
    NL8003050A|1981-03-23|
    GB2059072A|1981-04-15|
    BR8005884A|1981-03-24|
    SE8006561L|1981-03-20|
    DE2937802A1|1981-04-09|
    FR2465878B1|1983-05-27|
    PL131055B1|1984-09-29|
    IT8068147D0|1980-07-17|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
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    JPS5033892A|1973-07-24|1975-04-01|
    DE2416629C2|1974-04-05|1983-10-27|Robert Bosch Gmbh, 7000 Stuttgart|Measuring device for determining the oxygen content in exhaust gases, mainly from internal combustion engines|
    US4132615A|1974-04-05|1979-01-02|Robert Bosch Gmbh|Internal combustion engine exhaust gas oxygen sensor and catalyzer combination|
    JPS5748736B2|1975-03-26|1982-10-18|
    JPS5297789A|1976-02-11|1977-08-16|Nippon Soken|Oxygen concentration detector|
    JPS5922900B2|1976-10-29|1984-05-29|Ngk Insulators Ltd|
    JPS5381191A|1976-12-25|1978-07-18|Toyota Motor Co Ltd|Oxygen concentration sensor|
    JPS5712002B2|1977-07-08|1982-03-08|
    JPS5425888U|1977-07-25|1979-02-20|
    US4151060A|1978-02-01|1979-04-24|Westinghouse Electric Corp.|Solid state filter for gas sensors|
    US4199425A|1978-11-30|1980-04-22|General Motors Corporation|Solid electrolyte exhaust gas sensor with increased NOx sensitivity|
    DE2852647C2|1978-12-06|1986-04-30|Robert Bosch Gmbh, 7000 Stuttgart|Process for the production of a layer system on solid electrolytes for electrochemical applications|DE3743295C1|1987-12-19|1988-07-07|Daimler Benz Ag|Device for prolonging the service life and improving the measurement presence of a lambda probe installed in the exhaust gas flow of an internal combustion engine|
    US5271816A|1988-11-18|1993-12-21|Mitsubishi Jidosha Kogyo Kabushiki Kaisha|Oxygen sensor|
    US4903648A|1989-04-14|1990-02-27|Outboard Marine Corporation|Engine with improved exhaust gas sensing|
    JPH0331546A|1989-06-27|1991-02-12|Mitsubishi Motors Corp|Air-fuel ratio controller for internal combustion engine|
    US5083427A|1990-02-12|1992-01-28|Ford Motor Company|Apparatus and method to reduce automotive emissions using filter catalyst interactive with uego|
    JP2989929B2|1991-05-13|1999-12-13|株式会社デンソー|Air-fuel ratio control device for internal combustion engine|
    US5535135A|1993-08-24|1996-07-09|Motorola, Inc.|State estimator based exhaust gas chemistry measurement system and method|
    DE4330749C2|1993-09-10|1995-07-06|Siemens Ag|Device for measuring the partial pressure of oxygen in a gas mixture|
    DE4334672C2|1993-10-12|1996-01-11|Bosch Gmbh Robert|Sensor for the detection of nitrogen oxide|
    JPH07333192A|1994-06-07|1995-12-22|Nippondenso Co Ltd|Oxygen sensor|
    WO1998013687A1|1996-09-24|1998-04-02|Rosemount Analytical Inc.|Passive cell protection for solid electrolyte gas analyzer|
    FR2762045B1|1997-04-10|1999-06-04|Renault|EXHAUST DEVICE FOR INTERNAL COMBUSTION ENGINE AND ITS MANUFACTURING PROCESS|
    US6551498B2|2001-02-13|2003-04-22|Delphi Technologies, Inc.|Lower protective shield for an exhaust sensor and method for making the same|
    DE10153735B4|2001-10-31|2007-12-13|Robert Bosch Gmbh|probe|
    FR2854923B1|2003-05-12|2006-06-23|Peugeot Citroen Automobiles Sa|SYSTEM FOR AIDING THE REGENERATION OF A NOx TRAP|
    JP4932350B2|2006-06-29|2012-05-16|株式会社吉野工業所|Hinge cap|
    JP4950113B2|2007-06-05|2012-06-13|日本特殊陶業株式会社|Sensor|
    WO2012057786A1|2010-10-29|2012-05-03|Utc Fire & Security Corporation|Oxygen measuring apparatuses|
    JP5126420B2|2010-12-24|2013-01-23|トヨタ自動車株式会社|Cylinder air-fuel ratio variation abnormality detection device and method|
    JP2014215069A|2013-04-23|2014-11-17|株式会社日本自動車部品総合研究所|Gas sensor|
    JP2014215230A|2013-04-26|2014-11-17|株式会社日本自動車部品総合研究所|Gas sensor element|
    US11193853B2|2019-01-28|2021-12-07|Cummins Emission Solutions Inc.|Remanufacturable sensing assemblies and methods of remanufacture|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    DE2937802A|DE2937802C2|1979-09-19|1979-09-19|
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