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    Oxygen sensor
    2.
    发明公开
    Oxygen sensor 有权
    氧传感器

    公开(公告)号：EP0933630A1

    公开(公告)日：1999-08-04

    申请号：EP99101267.5

    申请日：1999-01-23

    申请人： NGK SPARK PLUG CO., LTD ,  HONDA MOTOR COMPANY LTD.

    发明人： Mizutani, Akio ,  Okawa, Teppei ,  Kubota, Hiroshi ,  Hosogai, Seiichi ,  Fujita, Hiroyuki

    IPC分类号： G01N27/407

    CPC分类号： G01N27/4077

    摘要： An oxygen sensor is disposed behind an exhaust gas purifying catalyst for an internal combustion engine and which suppresses the influence of unburnt hydrocarbon on the output voltage. A sensor element 1 is provided with a detection electrode 4 on the outer face of a zirconia ceramic body 2, a reference electrode 3 on the inner face of the ceramic body 2 and a spinel protective layer 5 on the outer surface of the detection electrode 4. The tip end of the sensor element 1 is covered with a protective cover 10 which is provided with an outer partition wall 11 having through holes 11a and an inner partition wall 12 having through holes 12a. In a case where the pressure difference between the inside and outside of the protective cover 10 is ΔP(atm) when the atmospheric air with a volume flow rate Q(l/min) is passed into the protective cover 10 from the outside, the ratio ΔP/Q 2 is 3.2×10 -5 (atm·min 2 ·1 -2 ). When the surface temperature of the sensor element 1 is changed in a range of sensor active temperature, the reversing time is substantially constant. Therefore, the catalyst deterioration can be detected by the oxygen sensor with high accuracy.

    摘要翻译： 氧传感器配置在内燃机的废气净化催化剂的后方，抑制未燃烧的碳氢化合物对输出电压的影响。 传感器元件1在氧化锆陶瓷体2的外表面上设置有检测电极4，在陶瓷体2的内表面上的参考电极3和在检测电极4的外表面上的尖晶石保护层5 传感器元件1的前端被设置有具有通孔11a的外部分隔壁11和具有通孔12a的内部分隔壁12的保护盖10覆盖。 当体积流量Q（l / min）的大气从外部流入保护罩10时，在保护罩10的内外的压力差为ΔP（atm）的情况下， ΔP/ Q2为3.2×10-5（atm·min2·1-2）。 当传感器元件1的表面温度在传感器活性温度的范围内变化时，反转时间基本恒定。 因此，氧传感器能够高精度地检测催化剂劣化。

    Oxygen Sensor
    3.
    发明公开
    Oxygen Sensor 审中-公开
    氧传感器

    公开(公告)号：EP0919807A1

    公开(公告)日：1999-06-02

    申请号：EP98122361.3

    申请日：1998-11-25

    申请人： NGK Spark Plug Co. Ltd. ,  HONDA MOTOR COMPANY LTD.

    发明人： Mizutani, Akio ,  Okawa, Teppei ,  Isomura, Hiroshi ,  Kubota, Hiroshi, c/o Honda Motor Co., Ltd. ,  Hosogai,Seiichi, c/o Honda Motor Co., Ltd. ,  Fujita, Hiroyuki, c/o Honda Motor Co., Ltd.

    IPC分类号： G01N27/407

    CPC分类号： G01N27/4071

    摘要： There is disclosed an oxygen sensor disposed before an exhaust gas purifying catalyst of an engine which uses a hydrocarbon containing fuel with a H/C ratio of three or more. An oxygen sensor 1 is provided with a solid electrolytic body 2 which can generate a difference in oxygen concentration with reference gas and measured gas, a reference electrode 3 and a detection electrode 4 formed on inner and outer surfaces of the solid electrolytic body 2, and a porous protective layer 5 for covering the detection electrode 4. The detection electrode 4 is formed only of a metal like Pt which promotes oxidizing reaction of methane to have a thickness of 1 to 2 µm. In the protective layer 5, only a second protective layer 5b carries Pt catalyst 6 which promotes oxidizing reaction of hydrogen, and the amount of carried catalyst is in the range of 0.5 to 7 mol% relative to the whole of the second protective layer 5b. According to the oxygen sensor 1, even if a large amount of hydrogen is exhausted, for example, from CNG engine, or even if a large amount of methane is exhausted, an excellent engine control can be realized.

    摘要翻译： 公开了一种配置在使用H / C比为3以上的含烃燃料的发动机的废气净化催化剂之前的氧传感器。 氧气传感器1具有能够产生与参考气体和测量气体的氧浓度差的固体电解质体2，形成在固体电解质体2的内表面和外表面上的参比电极3和检测电极4，以及 用于覆盖检测电极4的多孔保护层5.检测电极4仅由像Pt那样的促进甲烷氧化反应的金属形成以具有1至2μm的厚度。 在保护层5中，仅第二保护层5b承载促进氢的氧化反应的Pt催化剂6，并且承载催化剂的量相对于整个第二保护层5b在0.5至7mol％的范围内。 根据氧传感器1，即使例如来自CNG发动机的大量氢被耗尽，或者即使大量甲烷耗尽，也可以实现优异的发动机控制。

    Process for forming an electrode for a ceramic sensor element by electroless plating
    4.
    发明公开
    Process for forming an electrode for a ceramic sensor element by electroless plating 有权
    一种用于通过非电解镀技术制造用于陶瓷传感器元件的电极的过程

    公开(公告)号：EP0927775A2

    公开(公告)日：1999-07-07

    申请号：EP98309641.3

    申请日：1998-11-25

    申请人： NGK Spark Plug Co. Ltd.

    发明人： Isomura, Hiroshi ,  Ito, Yukichika ,  Mizutani, Akio ,  Hayakawa, Nobuhiro

    IPC分类号： C23C18/44 ,  G01N27/407

    CPC分类号： C23C18/44 ,  G01N27/407 ,  G01N27/4075

    摘要： Disclosed is a process for the formation of an electrode for sensor element which comprises the formation of a platinum electrode on a solid electrolyte formed in a predetermined shape as a sensor element by electroless plating, wherein said electroless plating is effected in a platinum (II) complex solution as a plating solution on which a reducing agent for reducing said platinum (II) complex is acted.

    摘要翻译： 公开了一种用于形成用于传感器元件的电极的方法，包括在一预定的形状，通过无电解电镀的传感器元件形成的固体电解质的铂电极的形成的过程中，worin所述电解镀敷在铂实现（II） 复合物溶液作为在其用于降低所述铂（II）络合物还原剂作用的镀敷液。

    Gas sensor
    5.
    发明公开
    Gas sensor 审中-公开
    气体传感器

    公开(公告)号：EP1109013A3

    公开(公告)日：2004-10-20

    申请号：EP00127539.5

    申请日：2000-12-15

    申请人： NGK SPARK PLUG CO., LTD

    发明人： Isomura, Hiroshi ,  Mizutani, Akio ,  Yamada, Daisuke

    IPC分类号： G01N27/407

    CPC分类号： G01N27/4077

    摘要： A gas sensor (1) comprises: a pair of porous electrode layers (2b and 2c); a detector element (2) between the porous electrode layers (2b and 2c), wherein the detecting element (2) comprises an oxygen ion conductive solid electrolyte comprising zirconium oxide as a major component, and one of the porous electrode layers is a detecting-side electrode (2b) to be exposed to a gas to be measured; and a ceramic protecting layer (2p) covering the surface of the detecting-side electrode (2b), wherein the ceramic protecting layer (2p) comprises a magnesia·alumina spinel component, an excess magnesium oxide component not involved in the magnesia·alumina spinel component, and a zirconium oxide component.

    摘要翻译： 一种气体传感器（1）包括：一对多孔电极层（2b和2c）; 在所述多孔电极层（2b和2c）之间的检测元件（2），其中所述检测元件（2）包括含有氧化锆作为主要成分的氧离子导电固体电解质，并且所述多孔电极层之一是检测元件 （2b）暴露于待测气体中; 和覆盖所述检测侧电极（2b）的表面的陶瓷保护层（2p），其中，所述陶瓷保护层（2p）包括氧化镁·氧化铝尖晶石组分，氧化镁·氧化铝尖晶石中不涉及的过量氧化镁组分 组分和氧化锆组分。

    Gas sensor
    7.
    发明公开
    Gas sensor 审中-公开
    Gassensor

    公开(公告)号：EP1109013A2

    公开(公告)日：2001-06-20

    申请号：EP00127539.5

    申请日：2000-12-15

    申请人： NGK SPARK PLUG CO., LTD

    发明人： Isomura, Hiroshi ,  Mizutani, Akio ,  Yamada, Daisuke

    IPC分类号： G01N27/407

    CPC分类号： G01N27/4077

    摘要： A gas sensor (1) comprises: a pair of porous electrode layers (2b and 2c); a detector element (2) between the porous electrode layers (2b and 2c), wherein the detecting element (2) comprises an oxygen ion conductive solid electrolyte comprising zirconium oxide as a major component, and one of the porous electrode layers is a detecting-side electrode (2b) to be exposed to a gas to be measured; and a ceramic protecting layer (2p) covering the surface of the detecting-side electrode (2b), wherein the ceramic protecting layer (2p) comprises a magnesia·alumina spinel component, an excess magnesium oxide component not involved in the magnesia·alumina spinel component, and a zirconium oxide component.

    摘要翻译： 气体传感器（1）包括：一对多孔电极层（2b和2c）; 多孔电极层（2b和2c）之间的检测元件（2），其中所述检测元件（2）包括氧化锆作为主要成分的氧离子导电固体电解质，并且所述多孔电极层中的一个是检测元件， 侧面电极（2b）暴露于待测气体; 以及覆盖所述检测侧电极（2b）的表面的陶瓷保护层（2p），其中，所述陶瓷保护层（2p）包含氧化镁·尖晶石成分，不包含在所述氧化镁·氧化铝尖晶石中的过量的氧化镁成分 组分和氧化锆组分。