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    • 1. 发明授权
    • Oxygen sensor
    • 氧传感器
    • US06210552B1
    • 2001-04-03
    • US09199319
    • 1998-11-25
    • Akio MizutaniTeppei OkawaHiroshi IsomuraHiroshi KubotaSeiichi HosogaiHiroyuki Fujita
    • Akio MizutaniTeppei OkawaHiroshi IsomuraHiroshi KubotaSeiichi HosogaiHiroyuki Fujita
    • G01N27407
    • G01N27/4071
    • 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 &mgr;m. 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.
    • 公开了使用H / C比为3以上的烃类燃料的发动机的排气净化催化剂之前设置的氧传感器。 氧传感器1设置有固体电解体2,其可以产生与参考气体和测量气体的氧浓度差,形成在固体电解体2的内表面和外表面上的参考电极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仅由促进甲烷的氧化反应的具有1〜2μm厚度的金属Pt形成。 在保护层5中,仅第二保护层5b携带促进氢的氧化反应的Pt催化剂6,并且所携带的催化剂的量相对于整个第二保护层5b为0.5〜7摩尔%。 根据氧传感器1,即使例如从CNG发动机排出大量的氢,即使大量的甲烷被排出,也能够实现良好的发动机控制。
    • 2. 发明授权
    • Gas sensor
    • 气体传感器
    • US07036352B2
    • 2006-05-02
    • US10879727
    • 2004-06-30
    • Hiroshi IsomuraShoji AkatsukaOsamu Shinkai
    • Hiroshi IsomuraShoji AkatsukaOsamu Shinkai
    • G01N27/26
    • G01N27/4077
    • A gas sensor comprising: a gas sensor element extending in an axial direction; a cylindrical metal shell enclosing said gas sensor element such that a leading end portion of said gas sensor element protrudes from its own leading end; and a protector fixed on said metal shell and covering said leading end portion of said gas sensor element, wherein said protector includes: a cylindrical outer cover portion fixed on said metal shell and having gas introducing apertures; and a cylindrical inner cover portion arranged on an inner side of said outer cover portion and having elastic portions being capable of being elastically deformed by a pushing force acting in an axial direction, and said inner cover portion is so clamped between said metal shell and said outer cover portion that said elastic portions are elastically deformed by said axial pushing force.
    • 一种气体传感器,包括:沿轴向延伸的气体传感器元件; 围绕所述气体传感器元件的圆柱形金属壳,使得所述气体传感器元件的前端部分从其自身的前端突出; 以及固定在所述金属壳上并覆盖所述气体传感器元件的前端部分的保护器,其中所述保护器包括:固定在所述金属壳上并具有气体引入孔的圆柱形外盖部分; 以及设置在所述外盖部分的内侧上并具有能够通过沿轴向作用的推力弹性变形的弹性部分的圆柱形内盖部分,并且所述内盖部分夹紧在所述金属壳体与所述 所述弹性部分通过所述轴向推力弹性变形的外壳部分。
    • 6. 发明授权
    • Gas sensor
    • 气体传感器
    • US08567231B2
    • 2013-10-29
    • US13582952
    • 2011-05-19
    • Hiroshi IsomuraAya SatoTakayoshi Atsumi
    • Hiroshi IsomuraAya SatoTakayoshi Atsumi
    • G01N7/00
    • G01N27/4067
    • A gas sensor includes an inner electrode formed on an inner surface of a base body. The inner electrode has an inner sensing portion formed in a gas contact inner region such that the inner sensing portion is located on the whole of a heat-facing area of the gas contact inner region facing a heating portion in a radial direction of the base body, a terminal contact portion formed in a rear end region such that the terminal contact portion is located in at least a part of the rear end region in a circumferential direction of the base body and a lead portion formed only on a part of the inner surface of the base body in the circumferential direction of the base body so as to connect the inner sensing portion and the terminal contact portion to each other.
    • 气体传感器包括形成在基体的内表面上的内电极。 内部电极具有形成在气体接触内部区域中的内部感测部分,使得内部感测部分位于与基体的径向方向上的加热部分相对的气体接触内部区域的整个面向热的区域的整体上 形成在后端区域中的端子接触部分,使得端子接触部分位于沿着基体的圆周方向的后端区域的至少一部分中,以及仅形成在内表面的一部分上的引线部分 在基体的圆周方向上形成基体,以将内部感测部和端子接触部彼此连接。
    • 8. 发明授权
    • Oxygen sensor and manufacturing method of sensor element
    • 氧传感器及传感器元件的制造方法
    • US06672137B1
    • 2004-01-06
    • US09869263
    • 2001-09-27
    • Hiroshi IsomuraTakayoshi AtsumiKoji ShionoMasamine Takagi
    • Hiroshi IsomuraTakayoshi AtsumiKoji ShionoMasamine Takagi
    • G01N900
    • G01N27/4077G01N33/0039Y02A50/247
    • The oxygen sensor of the present invention has excellent durability capable of effectively preventing contamination with lead or the like for a detection electrode even in low temperature exhaust gases, and having stable response over a long period of time. The contamination preventive layer provided in the sensor device comprises composite powders having coarse powders covered therearound with fine powders, and hollows not filled with fine powders are scattered in gaps among the composite powders. Both the coarse and fine powders comprise ceramic powders. Further, it is particularly preferred that the ceramic powders are powders of a titania powder having a peak at 1 &mgr;m or less and a composite ceramic powder containing alumina such as spinel having a peak at 10 &mgr;m or more. The contamination preventive layer can be formed by coating a slurry containing ceramic powders of different specific surface areas, an organic binder and a solvent such as methanol on the surface of the electrode protection layer followed by drying.
    • 本发明的氧传感器具有优异的耐久性,即使在低温废气中也能够有效地防止铅等检测电极的污染,并且长期稳定的响应。 设置在传感器装置中的防污染层包括具有细粉末的粗粉末的复合粉末,并且未填充有细粉末的中空部分散布在复合粉末之间的间隙中。 粗粉末和细粉末都包括陶瓷粉末。 此外,特别优选的是,陶瓷粉末是具有1mum以下的峰值的二氧化钛粉末的粉末,以及含有10个以上的峰值的尖晶石等的氧化铝的复合陶瓷粉末。 防污层可以通过在电极保护层的表面上涂布含有不同比表面积的陶瓷粉末,有机粘合剂和溶剂如甲醇的浆料,然后干燥而形成。