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    • 3. 发明授权
    • Resistance probe for determining gas compositions and method of
producing it
    • 用于确定气体成分的电阻探针及其制备方法
    • US5334350A
    • 1994-08-02
    • US861810
    • 1992-06-19
    • Karl-Hermann FrieseWerner GruenwaldHans-Martin WiedenmannGerhard Hoetzel
    • Karl-Hermann FrieseWerner GruenwaldHans-Martin WiedenmannGerhard Hoetzel
    • G01N27/12G01N33/00G01N27/04H01C1/02H01C7/00
    • G01N27/12
    • A resistance probe is proposed for detecting gas compositions, particularly in the exhaust gases of internal combustion engines. This resistance probe has the advantage over prior art resistance probes that, with a short response time, it is considerably more aging resistant. This is accomplished in that the resistance layer configured as a semiconductor layer is introduced or sintered into recesses or slits provided for this purpose in the prefabricated sensor carrier body and above it is applied a porous, electrically non-conductive engobe or a protective layer structure in the form of a grid or raster. These measures enable the measuring gas to gain access to the semiconductor layer, but the semiconductor layer is simultaneously protected against corrosive, erosive and/or cavitative attacks from the exhaust gas.
    • PCT No.PCT / DE90 / 00909 Sec。 371日期:1992年6月19日 102(e)日期1992年6月19日PCT提交1990年11月24日PCT公布。 出版物WO91 / 09301 日期:1991年6月27日。提出了用于检测气体组成的电阻探针,特别是在内燃机的废气中。 该电阻探针具有优于现有技术的电阻探针的优点,其具有较短的响应时间,其耐老化性更强。 这是通过将构造为半导体层的电阻层引入或烧结到预制传感器载体本体中为此而设置的凹部或狭缝中,并且在其上施加多孔,非导电性或者保护层结构 网格或栅格的形式。 这些措施使得测量气体能够进入半导体层,但同时保护半导体层免受来自废气的腐蚀性,侵蚀性和/或空穴化攻击。
    • 4. 发明授权
    • Method for determining gas components and/or gas concentrations of gas
mixture
    • 气体混合物气体组分和/或气体浓度的测定方法
    • US5595647A
    • 1997-01-21
    • US290703
    • 1995-01-19
    • Gerhard HoetzelHarald NeumannJohann Riegel
    • Gerhard HoetzelHarald NeumannJohann Riegel
    • G01N27/419G01N27/12G01N27/407G01N27/41
    • G01N27/407G01N27/4074
    • A method of determining at least one of gas constituents and gas concentrations of a gas mixture such as exhaust gas from an internal combustion engine includes producing a change in gas concentration of the gas mixture at a semiconductor gas sensor by pumping a variable supply of oxygen to the semiconductor gas sensor by means of a solid electrolyte pumping cell; detecting at least one reaction speed selected from the group consisting of adsorption speed and desorption speed caused by the change in gas concentration as a signal from the semiconductor gas sensor which is a reply function; evaluating the signal from the semiconductor gas sensor over time to provide a time response of the reply function; and comparing the time response of the reply function with a stored, standardized time response of different gas constituents whereby at least one of the gas constituents and the gas concentrations of the gas mixture are determined.
    • PCT No.PCT / DE94 / 00188 Sec。 371日期1995年1月19日 102(e)日期1995年1月19日PCT 1994年2月19日PCT PCT。 公开号WO94 / 22007 日期1994年9月29日一种确定气体混合物(例如来自内燃机的废气)的气体组分和气体浓度中的至少一种的方法包括通过泵送一个半导体气体传感器来产生气体混合物的气体浓度的变化 通过固体电解质泵送单元向半导体气体传感器供应氧气; 检测从由作为回复功能的半导体气体传感器的信号的气体浓度的变化引起的吸附速度和解吸速度中选择的至少一个反应速度; 评估来自半导体气体传感器的信号随时间提供回复功能的时间响应; 以及将回复函数的时间响应与不同气体成分的存储的,标准化的时间响应进行比较,由此确定气体混合物的气体成分和气体浓度中的至少一种。
    • 6. 发明授权
    • Sensor element for limiting current sensors for determination of the
.lambda. value of gas mixtures
    • 用于限制用于确定气体混合物((LAMBDA))值的电流传感器的传感器元件
    • US5137615A
    • 1992-08-11
    • US566376
    • 1990-08-30
    • Karl-Hermann FrieseGerhard Hoetzel
    • Karl-Hermann FrieseGerhard Hoetzel
    • G01N27/41B41M1/12B81B1/00C04B35/00F02D41/00F02D41/14G01N27/00G01N27/12G01N27/407G01N27/416G01N27/417H01L49/00
    • G01N27/4071G01N27/4072
    • A sensor element for limiting current sensors for determination of the .lambda.-value of gas mixtures is proposed, which has at least one outer pumping electrode and one inner pumping electrode, on a solid electrolyte in platelet or foil form, conducting O.sup.2- ions, of which the inner pumping electrode is arranged in a diffusion channel for the measuring gas. It consists of a porous three-dimensional precious metal electrode having a supporting structure, the thickness of which electrode corresponds to the height of the diffusion channel. Characteristic of the inner pumping electrode is a greatly improved load-bearing capacity in comparison with electrodes of sheet-like design, whereby the service life of the sensor element is increased. A further advantage of the three-dimensional design of the inner pumping electrode is that it takes on a supporting function during lamination in the production of the sensor element by ceramic foil and screen printing techniques.
    • PCT No.PCT / DE89 / 00102 Sec。 371日期1990年8月30日第 102(e)1990年8月30日PCT PCT 1989年2月23日提交PCT。 出版物WO89 / 08840 日本1989年9月21日提出了一种用于限制用于确定气体混合物的λ值的电流传感器的传感器元件,其具有至少一个外部泵浦电极和一个内部泵浦电极,在片状或箔形式的固体电解质上 ,其中内部泵浦电极布置在用于测量气体的扩散通道中的O2-离子。 它由具有支撑结构的多孔三维贵金属电极组成,其电极的厚度对应于扩散通道的高度。 与片状设计的电极相比,内部泵送电极的特性是大大改善的承载能力,从而传感器元件的使用寿命增加。 内部泵送电极的三维设计的另一优点在于,通过陶瓷箔和丝网印刷技术在传感器元件的制造中层压期间它具有支撑功能。
    • 7. 发明授权
    • Method and arrangement for analyzing exhaust gas from an internal combustion engine
    • 用于分析来自内燃机的废气的方法和装置
    • US06192738B1
    • 2001-02-27
    • US09244933
    • 1999-02-04
    • Roland StahlDietrich AdolphGerhard HoetzelJohann Riegel
    • Roland StahlDietrich AdolphGerhard HoetzelJohann Riegel
    • G01N700
    • G01N33/0013
    • In order to provide a method and arrangement for analytical determination of the relative amounts of exhaust gas components, except for water, but including hydrogen in the rich range or oxygen in the lean range, and for determining a &lgr; value, in which the exhaust gas sample can be taken at any arbitrary location, an arrangement is provided in which at least one portion of the exhaust gas is passed through a catalytic reactor (2, 22), a condenser (3,23) connected to the catalytic reactor to receive the gas passed through it, and, after passing through the condenser, the gas passes through an IR spectrometer and by a &lgr;-sensor. The oxidizable and reducible components of the exhaust gas are reacted with each other in the catalytic reactor which is heated to temperatures greater than 450° C. The relative amounts of CO2, hydrocarbons and, if present, CO are measured with the IR spectrometer and either the relative amount of hydrogen in the rich range or of O2+½ NO in the lean range is determined with the help of the signal (Ip) from the &lgr;-sensor. A &lgr; value is calculated from the measured exhaust gas component concentrations or relative amounts.
    • 为了提供除了水以外的排气组分的相对量的分析确定方法和装置,但是包括富含范围内的氢或贫浓范围的氧,并且用于确定l值,其中废气 可以在任何任意位置取样,其中提供排气的至少一部分通过催化反应器(2,22)的排列,连接到催化反应器的冷凝器(3,23),以接收 气体通过它,并且在通过冷凝器之后,气体通过IR光谱仪和羔羊传感器。 废气中的可氧化和可还原的组分在催化反应器中彼此反应,催化反应器被加热至高于450℃。如果使用红外光谱仪测量CO 2,烃和CO(如果存在的话)的相对量, 借助于来自羔羊传感器的信号(Ip)来确定浓范围中的氢的相对量或在稀疏范围内的O2 +½NO的相对量。 从测量的废气组分浓度或相对量计算羔羊值。
    • 9. 发明授权
    • Gas sensor
    • 气体传感器
    • US5880353A
    • 1999-03-09
    • US945297
    • 1997-12-14
    • Theodor GraserGerhard HoetzelJohann WehrmannHeinz Eisenschmid
    • Theodor GraserGerhard HoetzelJohann WehrmannHeinz Eisenschmid
    • G01N27/409G01N27/407G01N27/413B60H1/32H01L7/00
    • G01N27/4078G01N27/4077
    • A gas sensor having a sensor element which is immobilized in gas-tight fashion in a metal housing. The gas sensor has a double-walled protective tube with an outer protective sleeve and an inner protective sleeve, each of which possesses openings for the entry and/or exit of gas. The inner protective sleeve forms a gas space into which the sensor element projects with a section at the measurement-gas end. The outer protective sleeve is a sleeve having a closed enveloping surface, the openings for the entry and/or exit of gas being arranged in the cavity at the end face of the sleeve. The gas space formed by the inner protective sleeve has, perpendicular to the extension direction of the sensor element, a rectangular cross section.
    • PCT No.PCT / DE96 / 02210 Sec。 371日期1997年10月14日第 102(e)1997年10月14日PCT PCT 1996年11月20日PCT公布。 出版物WO97 / 33165 日期1997年9月12日一种具有传感器元件的气体传感器,其以气密方式固定在金属壳体中。 气体传感器具有双壁保护管,其具有外部保护套和内部保护套,每个保护套具有用于进入和/或排出气体的开口。 内部保护套形成气体空间,传感器元件在测量气体端部与部分一起突出。 外保护套是具有封闭的包络表面的套筒,用于气体的进入和/或排出的开口布置在套筒的端面处的空腔中。 由内保护套筒形成的气体空间垂直于传感器元件的延伸方向具有矩形截面。
    • 10. 发明授权
    • Method and a device for detecting the oxygen content in gases
    • 用于检测气体中氧含量的方法和装置
    • US5632883A
    • 1997-05-27
    • US545848
    • 1995-11-13
    • Gerhard Hoetzel
    • Gerhard Hoetzel
    • G01N27/409G01N27/419G01N27/407
    • G01N27/419
    • The invention relates to a device for detecting the oxygen content in a gas to be measured, wherein the device comprises at least one concentration cell which includes a measuring electrode, a solid electrolyte and a reference electrode. The measuring electrode communicates with the gas to be measured and is connected via the solid electrolyte to the reference electrode, which communicates with a reference gas volume. The reference gas volume is separated from the gas to be measured in such a way that a particle exchange between the reference gas volume and the gas to be measured is at least impeded. The output voltage of the concentration cell, which voltage can be tapped off between the measuring electrode and the reference electrode, represents a measure of the difference in the oxygen concentrations in the gas to be measured and in the reference gas volume. The device further comprises a current source which can be coupled in between the reference electrode and the measuring electrode in such a way that in the coupled-in state a current flow results which is directed such that oxygen is transported in the solid electrolyte from the measuring electrode to the reference electrode. The device further comprises switching means which, in a first switching state, couples the current source to the concentration cell and which, in a second switching state, decouples the current source from the concentration cell, so that the voltage between the measuring electrode and the reference electrode in the decoupled state is not affected by the current source.
    • PCT No.PCT / DE95 / 00258 Sec。 371日期:1995年11月13日 102(e)1995年11月13日,PCT提交1995年2月28日PCT公布。 WO95 / 24643 PCT出版物 日期1995年9月14日本发明涉及一种用于检测待测气体中的氧含量的装置,其中该装置包括至少一个浓度池,其包括测量电极,固体电解质和参比电极。 测量电极与待测气体连通,并通过固体电解质与参比电极连接,参比电极与参考气体体积连通。 将参考气体体积与待测量的气体以至少阻碍参考气体体积和被测量气体之间的颗粒交换的方式分离。 可以在测量电极和参比电极之间抽出电压的浓度单元的输出电压表示待测气体和参考气体体积中的氧气浓度差的度量。 该装置还包括电流源,其可以以这样的方式耦合在参考电极和测量电极之间,使得在耦合状态下导致电流流动导致氧气在固体电解质中从测量 电极到参比电极。 该装置还包括开关装置,其在第一开关状态下将电流源耦合到浓度电池,并且在第二开关状态下,将电流源与浓度电池分离,使得测量电极和 解耦状态的参比电极不受电流源的影响。