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    Apparatus for sensing air-fuel ratio
    2.
    发明授权
    Apparatus for sensing air-fuel ratio 失效
    用于检测空燃比的装置

    公开(公告)号：US4863584A

    公开(公告)日：1989-09-05

    申请号：US190144

    申请日：1988-05-04

    申请人： Takao Kojima ,  Hiroyuki Ishiguro ,  Yoshihide Kami

    发明人： Takao Kojima ,  Hiroyuki Ishiguro ,  Yoshihide Kami

    IPC分类号： G01N27/419 ,  F02D41/14 ,  F02D41/22 ,  G01N27/30 ,  G01N27/406 ,  G01N27/407 ,  G01N27/416

    CPC分类号： G01N27/4071 ,  F02D41/1454 ,  G01N27/4065

    摘要： An apparatus for sensing air-fuel ratio of the present invention is capable of measuring an air-fuel ratio of the air-fuel combustion mixture by sensing a partial pressure of oxygen in the exhaust gas. This apparatus forms a gas regulation chamber by arranging oxygen ion conductive solid electrolytes opposite to each other through a gap. In the gas regulation chamber, diffusion of exhaust gas is regulated. Porous electrodes are formed on both sides of the solid electrolytes. One sensor element formed by one of the solid electrolytes is operated as an oxygen concentration cell element, while the other sensor element formed by the other solid electrolyte is operated as an oxygen pump element. Moreover, the sensor elements are heated in order to activate such elements by heaters provided separately. A constant current is supplied to the oxygen concentration cell element in such a direction as pumping the oxygen into the gas regulation chamber. Supply of a constant current to the oxygen concentration cell element allows existence of a fixed output voltage from the oxygen concentration cell element even when the heater voltage changes. Accordingly, an air-fuel ration can be sensed accurately, independent of change in heater voltage which has been considered as a cause of problem, by controlling a supply current to the oxygen pump element so that an output voltage of the oxygen concentration cell element becomes the fixed voltage and then sensing the air-fuel ratio from such current value.

    摘要翻译： 本发明的感测空燃比的装置能够通过感测排气中的氧分压来测定空燃比燃烧混合气体的空燃比。 该装置通过将氧离子传导性固体电解质通过间隙相互相对设置而形成气体调节室。 在气体调节室中，废气的扩散被调节。 多孔电极形成在固体电解质的两侧。 由固体电解质之一形成的一个传感器元件作为氧浓度电池元件操作，而由另一固体电解质形成的另一个传感器元件作为氧气泵元件操作。 此外，传感器元件被加热以通过单独提供的加热器激活这些元件。 将恒定电流沿着将氧气泵入气体调节室的方向供给氧浓度电池元件。 向氧浓度电池元件供给恒定电流即使在加热器电压变化时也允许存在来自氧浓度电池元件的固定输出电压。 因此，通过控制对氧泵元件的供给电流，氧浓度电池元件的输出电压变为 固定电压，然后从该电流值感测空燃比。

    Air/fuel ratio sensor
    3.
    发明授权
    Air/fuel ratio sensor 失效
    空/燃比传感器

    公开(公告)号：US4747930A

    公开(公告)日：1988-05-31

    申请号：US68293

    申请日：1987-07-01

    申请人： Takao Kojima ,  Hiroyuki Ishiguro ,  Yoshihide Kami

    发明人： Takao Kojima ,  Hiroyuki Ishiguro ,  Yoshihide Kami

    IPC分类号： G01N27/419 ,  B41M1/34 ,  C04B35/00 ,  C23C4/12 ,  C23C14/22 ,  C25D5/00 ,  F02D41/18 ,  G01N27/12 ,  G01N27/407 ,  G01N27/409 ,  G01N27/416 ,  G01N27/417 ,  G01N27/58

    CPC分类号： G01N27/4073 ,  G01N27/4071

    摘要： An air-fuel ratio sensor including a box member having a wall made of oxygen ion-conductive electrolyte having a pair of porous electrodes on opposite sides and a diffusion-limiting portion providing communication between the inside and outside of the box member, and an oxygen gas sensing element formed within the box member by injection and firing. The oxygen gas sensing element has a resistance which varies in accordance with the oxygen partial pressure of the atmosphere in which the sensor is immersed.

    摘要翻译： 一种空燃比传感器，包括具有由氧离子传导性电解质构成的壁的箱体构件，所述壁由相对侧的一对多孔电极和设置在所述盒构件的内部和外部之间的连通的扩散限制部，以及氧 气体传感元件通过注射和点火形成在箱体内。 氧气检测元件具有根据传感器浸入的大气的氧分压而变化的电阻。

    Gas sensor having hermetic and electrically insulating seal in housing
    4.
    发明授权
    Gas sensor having hermetic and electrically insulating seal in housing 失效
    气体传感器在外壳中具有密封和电绝缘密封

    公开(公告)号：US5228975A

    公开(公告)日：1993-07-20

    申请号：US598018

    申请日：1990-10-11

    申请人： Tatsuya Yamada ,  Toshiya Koide ,  Yoshihide Kami

    发明人： Tatsuya Yamada ,  Toshiya Koide ,  Yoshihide Kami

    IPC分类号： G01N27/12 ,  G01N27/04 ,  G01N27/407

    CPC分类号： G01N27/407 ,  G01N27/4077 ,  G01N27/4078

    摘要： The invention relates to a gas sensor using a known gas sensitive element which provides an electrical output signal. For example, the sensitive element has a zirconia solid electrolyte sensitive to oxygen. The gas sensitive element is mounted on a ceramic substrate, and the substrate is partly inserted in a tubular housing, and a hermetic and electrically insulating seal column is formed in the housing to tightly hold the substrate. Lead wires protruding from the substrate are connected to external leads within the housing, and the joints are buried in the seal column. According to the invention, the seal column is formed of a glass-ceramic origitated from a glass which is composed of ZnO, B.sub.2 O.sub.3, SiO.sub.2 and MgO and has a crystallizing temperature of 740.degree.-900.degree. C. The glass-ceramic has a linear expansion coefficient smaller than that of the housing by 3.times.10.sup.-6 /.degree.C. at the most. Preferably alumina ceramic is used as the housing material. The glass-ceramic seal column is high in heat resistance and remains sufficiently airtight and electrically insulating even when its temperature exceeds 500.degree. C.

    摘要翻译： 本发明涉及一种使用提供电输出信号的已知气体敏感元件的气体传感器。 例如，敏感元件具有对氧敏感的氧化锆固体电解质。 气体敏感元件安装在陶瓷基板上，并且基板部分地插入管状壳体中，并且在壳体中形成密封且电绝缘的密封柱以紧密地保持基板。 从基板突出的引线与壳体内的外部引线相连，接头被埋在密封柱中。 根据本发明，密封柱由来自由ZnO，B2O3，SiO2和MgO组成的玻璃的玻璃陶瓷形成，结晶温度为740-900℃。玻璃陶瓷具有线性 最大膨胀系数小于住房的3×10 -6 /℃。 优选使用氧化铝陶瓷作为外壳材料。 玻璃陶瓷密封柱的耐热性高，即使温度超过500℃也保持充分的气密性和电绝缘性。