公开(公告)号：US07182846B2

公开(公告)日：2007-02-27

申请号：US10447303

申请日：2003-05-29

申请人： Keigo Mizutani ,  Masataka Naito ,  Daisuke Makino ,  Kazunori Suzuki

发明人： Keigo Mizutani ,  Masataka Naito ,  Daisuke Makino ,  Kazunori Suzuki

IPC分类号： G01N27/26

CPC分类号： G01N27/4074

摘要： A gas sensor element is provided which is designed to measure the concentration of hydrogen-containing gas accurately. The sensor element includes an oxygen pump cell working to keep the concentration of oxygen contained in measurement gasses entering a measurement gas chamber at a low concentration level and a hydrogen-containing gas measurement cell. The hydrogen-containing gas measurement cell is made up of a proton-conductive solid electrolyte body and a first and a second gas measurement electrode affixed to the proton-conductive solid electrolyte body. The first gas measurement electrode is exposed to the measurement gas chamber and serves to produce a signal between the first and second gas measurement electrodes as a function of the concentration of the hydrogen-containing gas.

摘要翻译： 提供了一种气体传感器元件，其设计用于精确测量含氢气体的浓度。 传感器元件包括氧气泵电池，其工作以保持测量气体中所含的氧浓度进入低浓度水平的测量气室和含氢气体测量池。 含氢气体测量单元由质子传导固体电解质体和固定在质子传导性固体电解质体上的第一和第二气体测量电极构成。 第一气体测量电极暴露于测量气体室，用于在第一和第二气体测量电极之间产生作为含氢气体浓度的函数的信号。

公开(公告)号：US6068747A

公开(公告)日：2000-05-30

申请号：US22485

申请日：1998-02-12

申请人： Senta Tojo ,  Makoto Saito ,  Keigo Mizutani ,  Hiroshi Mori ,  Yushi Fukuda

发明人： Senta Tojo ,  Makoto Saito ,  Keigo Mizutani ,  Hiroshi Mori ,  Yushi Fukuda

IPC分类号： G01N27/417 ,  G01N33/00 ,  G01N27/407

CPC分类号： G01N27/417 ,  G01N33/0037

摘要： A gas sensor using oxygen-ion-conductive solid electrolyte layers measures a concentration of a constituent gas such as NOx in a gas mixture such as an exhaust gas mixture of an internal combustion engine. The gas sensor includes a pair of oxygen pumping cells and a sensor cell. Before the constituent gas concentration is measured by the sensor cell, oxygen gas contained in the gas mixture has to be purged because the oxygen gas adversely affects the measurement of the constituent gas concentration. Two pumping cells disposed to face a chamber, into which the gas mixture is introduced, pump out the oxygen gas contained in the gas mixture so that the oxygen concentration is reduced substantially zero. Then, the gas mixture is diffused to the sensor cell where the constituent gas concentration is measured without the adverse influence of the oxygen gas. A marginal ion current which is proportional to the constituent gas concentration is measured by the sensor cell with a high accuracy and sensitivity.

摘要翻译： 使用氧离子传导固体电解质层的气体传感器测量诸如内燃机的排气混合物的气体混合物中的诸如NOx的组成气体的浓度。 气体传感器包括一对氧气泵浦单元和传感器单元。 在通过传感器单元测量构成气体浓度之前，由于氧气不利地影响构成气体浓度的测量，所以必须清除气体混合物中所含的氧气。 设置为面对引入气体混合物的室的两个泵送单元泵出包含在气体混合物中的氧气，使得氧浓度基本上降低为零。 然后，气体混合物扩散到测量组分气体浓度而不受氧气的不利影响的传感器单元。 与组成气体浓度成比例的边际离子电流由传感器单元以高精度和灵敏度测量。

公开(公告)号：US5985118A

公开(公告)日：1999-11-16

申请号：US958388

申请日：1997-10-27

申请人： Daisuke Makino ,  Keigo Mizutani ,  Hisayoshi Ohta ,  Yoshimasa Hijikata ,  Kanehito Nakamura ,  Hiroshi Mori

发明人： Daisuke Makino ,  Keigo Mizutani ,  Hisayoshi Ohta ,  Yoshimasa Hijikata ,  Kanehito Nakamura ,  Hiroshi Mori

IPC分类号： G01N27/416 ,  G01N27/407 ,  G01N27/26

CPC分类号： G01N27/4074

摘要： A gas concentration detector using solid electrolyte layers laminated measures a concentration of gas constituents in measuring gas such as exhaust gas of an internal combustion engine without being influenced by oxygen concentration in the measuring gas. The measuring gas is introduced into an inner cavity of the detector and outside air as a reference gas is introduced into an air passage in the detector. Oxygen concentration in the measuring gas in the inner cavity is maintained at a predetermined level by operation of an oxygen pumping cell constituted by an ion conductive solid electrolyte layer and a pair of electrodes formed on both surfaces of the layer. The oxygen concentration in the inner cavity is measured by an oxygen sensor cell having one electrode exposed to the inner cavity and the other electrode exposed to the reference gas. The concentration of the gas constituents in the measuring gas is measured in terms of ion current generated in a detector cell constituted by an ion conductive solid electrolyte layer and a pair of electrodes formed on both surfaces of the layer, one electrode being exposed to the measuring gas in the inner cavity and the other exposed to the reference gas in the air passage. Either one of the sensor cell and detector cell electrodes exposed to the measuring gas in the inner cavity is made of a material active to the gas constituents to be measured and the other electrode is made of a material inactive thereto.

摘要翻译： 使用固体电解质层层压的气体浓度检测器不受测量气体中的氧浓度的影响而测量诸如内燃机的废气的测量气体中的气体成分的浓度。 当检测器中的空气通道中引入参考气体时，测量气体被引入到检测器和外部空气的内腔中。 通过由离子传导固体电解质层和形成在该层的两个表面上的一对电极构成的氧抽吸电池的操作将内腔中的测量气体中的氧浓度保持在预定水平。 通过具有暴露于内腔的一个电极和暴露于参考气体的另一电极的氧传感器单元来测量内腔中的氧浓度。 测量气体中气体组分的浓度以离子导电固体电解质层和形成在该层的两个表面上的一对电极构成的检测器电池中产生的离子电流来测量，一个电极暴露于测量 内腔中的气体，另一个暴露于空气通道中的参考气体。 暴露于内腔中的测量气体的传感器单元和检测器单元电极中的任何一个由对待测量的气体成分有活性的材料制成，另一个电极由对其无活性的材料制成。