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1. 发明公开

EP0896220A1 Oxygen sensor 有权
标题翻译：氧传感器
公开(公告)号：EP0896220A1
公开(公告)日：1999-02-10
申请号：EP98114866.1
申请日：1998-08-07
申请人： NGK SPARK PLUG CO., LTD , HONDA MOTOR COMPANY LTD.
发明人： Matsuzaki, Hiroshi , Suzuki, Keiji , Ookawa, Teppei , Kubota, Hiroshi , Hosogai, Seiichi , Fujita, Hiroyuki , Nakamura, Katsunori
IPC分类号： G01N27/407
CPC分类号： G01N27/407
摘要： An oxygen sensor is disposed downstream from a catalyst for purifying exhaust gas from an internal combustion engine and which can suppress an influence of unburnt hydrocarbon on an output voltage. After forming a platinum thin film on the outer periphery of a zirconia ceramic body, only a detection electrode of the ceramic body is dipped in a silver nitrate aqueous solution of 0.1 mol/l, and the silver nitrate is pyrolyzed through a heat treatment. Subsequently, a platinum reference electrode is formed on the inner periphery of the ceramic body. To protect the silver-doped detection electrode, a protective layer is formed on the surface of the detection electrode. By the exposure to combustion gas and through aging, a detection element is formed, and set into a metal case together with a cylindrical heater, to complete an oxygen sensor to be disposed downstream from a CNG engine catalyst.
摘要翻译：氧传感器设置在用于净化来自内燃机的排气的催化剂的下游，并且能够抑制未燃碳氢化合物对输出电压的影响。在氧化锆陶瓷体的外周上形成铂薄膜之后，仅将陶瓷体的检测电极浸入0.1摩尔/升的硝酸银水溶液中，并通过热处理使硝酸银热解。随后，在陶瓷体的内周上形成铂参考电极。为了保护银掺杂的检测电极，在检测电极的表面上形成保护层。通过暴露于燃烧气体和老化，形成检测元件，并将其与圆柱形加热器一起设置到金属壳体中，以完成将氧气传感器布置在CNG发动机催化剂的下游。

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