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    Oxygen sensor
    3.
    发明公开
    Oxygen sensor 失效
    氧传感器。

    公开(公告)号：EP0121905A1

    公开(公告)日：1984-10-17

    申请号：EP84103756.7

    申请日：1984-04-05

    申请人： HITACHI, LTD.

    发明人： Sasayama, Takao ,  Suzuki, Seikoh ,  Suzuki, Toshitaka ,  Miki, Masayuki ,  Ueno, Sadayasu

    IPC分类号： G01N27/56

    CPC分类号： G01N27/4071 ,  G01N27/4065

    摘要： An oxygen sensor is disclosed in which an airtight reference chamber (32) isolated from a surrounding space is formed on one main surface of a solid electrolyte (10), a current is supplied to the solid electrolyte to pump out oxygen from the reference chamber in such a manner that oxygen in the reference chamber is ionized and then passes through the solid electrolyte, means is provided for transferring oxygen from the surrounding space to the reference chamber in such a manner that oxygen in the surrounding space is ionized and then passes through the solid electrolyte, and the oxygen concentration in the surrounding space is detected on the basis of the current supplied to the solid electrolyte.

    Apparatus for measuring oxygen concentration and method of producing the appartus
    4.
    发明公开
    Apparatus for measuring oxygen concentration and method of producing the appartus 失效
    设备，用于测量氧浓度和它们的制备方法。

    公开(公告)号：EP0144057A2

    公开(公告)日：1985-06-12

    申请号：EP84114331.6

    申请日：1984-11-27

    申请人： HITACHI, LTD.

    发明人： Suzuki, Seikoh ,  Miki, Masayuki ,  Sasayama, Takao ,  Suzuki, Toshitaka ,  Ueno, Sadayasu

    IPC分类号： G01N27/417

    CPC分类号： G01N27/4071 ,  G01N33/0011

    摘要： An oxygen concentration measuring apparatus having two electrodes (12, 13) formed on respective sides of a thin plate of a solid electrolyte (11), one of the electrodes (12) being exposed to a diffusion chamber (16) having a diffusion aperture. The diffusion chamber (16) has a very small depth (h) and the diffusion aperture (24, 25) has a slit-like form extending laterally from the diffusior chamber (16), thereby attaining a good response characteristics of the oxygen concentration measuring apparatus Disclosed also is a method of producing this oxygen concentration measuring apparatus.

    摘要翻译： 氧浓度测量具有两个电极上的固体电解质（11）的薄板形成respectivement侧装置（12，13），电极（12）中的一个被暴露于具有一个扩散孔扩散室（16）。 扩散室（16）具有一个非常小的深度（h）和所述扩散孔（24，25）具有狭缝状的形状从扩散室（16）延伸尾盘反弹，从而获得氧浓度测量的良好的响应特性 设备。 因此本发明公开了生产该氧浓度测定装置的方法。

    Air-fuel ratio sensor used to control an internal combustion engine
    5.
    发明公开
    Air-fuel ratio sensor used to control an internal combustion engine 失效
    用于控制内燃机的空燃比传感器

    公开(公告)号：EP0140295A3

    公开(公告)日：1985-06-05

    申请号：EP84112572

    申请日：1984-10-18

    申请人： HITACHI, LTD.

    发明人： Miki, Masayuki ,  Suzuki, Seikoh ,  Sasayama, Takao ,  Suzuki, Toshitaka

    IPC分类号： G01N27/56

    CPC分类号： G01N27/4065 ,  G01N27/4072

    摘要： 0 An air-fuel ratio sensor installed in exhaust gas emitted by an internal combustion engine for detecting from the exhaust composition on the air-fuel ratio in the engine becoming equal to a stoichiometric air-fuel ratio. The sensor comprises a solid electrolytic layer of zirconia (10), a pair of electrodes (20, 30) formed on both sides of the electrolytic layer, and a cover (70) provided over the electrolytic layer to enclose one of the electrodes, with a diffusion room formed between the cover and the electrolytic layer and with a gas diffusion hole (5) formed to communicate the diffusion room with the outside of the sensor. The electrode (20) in the diffusion room works as a positive electrode, while another electrode (30) works as a negative electrode to conduct a current (lp) between these electrodes so as to control the oxygen concentration in the diffusion room as a reference oxygen concentration. The fact that the air-fuel ratio has become equal to the stoichiometric air-fuel ratio is detected from a voltage (Eo) appearing between the electrodes.

    Method of operating an air-fuel ratio sensor
    6.
    发明公开
    Method of operating an air-fuel ratio sensor 失效
    Verfahren zum Betreiben einesFühlersfürLuftkraftstoff-Verhältnisse。

    公开(公告)号：EP0140295A2

    公开(公告)日：1985-05-08

    申请号：EP84112572.7

    申请日：1984-10-18

    申请人： HITACHI, LTD.

    发明人： Miki, Masayuki ,  Suzuki, Seikoh ,  Sasayama, Takao ,  Suzuki, Toshitaka

    IPC分类号： G01N27/56

    CPC分类号： G01N27/4065 ,  G01N27/4072

    摘要： 0 An air-fuel ratio sensor installed in exhaust gas emitted by an internal combustion engine for detecting from the exhaust composition on the air-fuel ratio in the engine becoming equal to a stoichiometric air-fuel ratio. The sensor comprises a solid electrolytic layer of zirconia (10), a pair of electrodes (20, 30) formed on both sides of the electrolytic layer, and a cover (70) provided over the electrolytic layer to enclose one of the electrodes, with a diffusion room formed between the cover and the electrolytic layer and with a gas diffusion hole (5) formed to communicate the diffusion room with the outside of the sensor. The electrode (20) in the diffusion room works as a positive electrode, while another electrode (30) works as a negative electrode to conduct a current (lp) between these electrodes so as to control the oxygen concentration in the diffusion room as a reference oxygen concentration. The fact that the air-fuel ratio has become equal to the stoichiometric air-fuel ratio is detected from a voltage (Eo) appearing between the electrodes.

    摘要翻译： 安装在由内燃机排出的排气中的空燃比传感器，用于根据发动机的空燃比检测排气组成，等于理论空燃比。 所述传感器包括氧化锆（10）的固体电解质层，形成在所述电解质层两侧的一对电极（20,30），以及设置在所述电解质层上以封闭其中一个所述电极的盖（70） 形成在盖和电解质层之间的扩散室，以及形成为使扩散室与传感器的外部连通的气体扩散孔（5）。 扩散室中的电极（20）作为正极工作，而另一个电极（30）用作负极以在这些电极之间传导电流（Ip），以便控制扩散室中的氧浓度作为参考 氧浓度。 从出现在电极之间的电压（Eo）检测空燃比变得等于理论空燃比的事实。

    Air-fuel ratio detector
    10.
    发明公开
    Air-fuel ratio detector 失效
    感测所述空气 - 燃料比。

    公开(公告)号：EP0173157A1

    公开(公告)日：1986-03-05

    申请号：EP85110101.4

    申请日：1985-08-12

    申请人： HITACHI, LTD.

    发明人： Suzuki, Seiko ,  Miki, Masayuki ,  Sasayama, Takao ,  Suzuki, Toshitaka ,  Satou, Nobuo ,  Ueno, Sadayasu ,  Ikegami, Akira

    IPC分类号： G01N27/56

    CPC分类号： G01N27/4065

    摘要： An air-fuel ratio in the lean range is detected by measuring a limiting current when oxygen diffused to a first electrode (123; 2; 51) is pumped to a second electrode (124; 3; 52) via a solid electrolyte. A stoichiometric air-fuel ratio is detected from electromotive force between first (123; 2; 51) and third electrodes (126; 6; 53) when oxygen is pumped from the first electrode (123; 2; 51) to the third electrode (126; 6; 53). The invention is characterized by use of such three electrodes. Furthermore, an air-fuel ratio in a rich range is detected by either sending oxygen from the first electrode (123; 2; 51) to the third electrode (126; 6; 53) via the solid electrolyte (127; 1; 50) and measuring a current when the electromotive force between the first and third electrodes is controlled to be constant, or measuring a current when the air-fuel ratio range is judged as "rich" from this electromotive force and the polarity of the impressed voltage at the time of lean detection is reversed.