公开(公告)号：US07122103B2

公开(公告)日：2006-10-17

申请号：US10401560

申请日：2003-03-31

申请人： Shigeo Isitani ,  Futoshi Ichiyanagi ,  Yasuji Orimo ,  Chiharu Katsuyama

发明人： Shigeo Isitani ,  Futoshi Ichiyanagi ,  Yasuji Orimo ,  Chiharu Katsuyama

IPC分类号： G01N27/41

CPC分类号： G01N27/419

摘要： The invention relates to an air/fuel ratio detection apparatus for a gas. This apparatus includes (a) a heater portion having an elongate cylindrical shape; (b) a solid electrolyte layer surrounding the heater portion and activated by heat to conduct oxygen ions therethrough; (c) a first electrode positioned between the heater portion and the solid electrolyte layer; (d) second and third electrodes in contact with an outer surface of the solid electrolyte layer and away from each other; (e) a first voltage applying device for applying a first voltage between the first and second electrodes; (f) a second voltage applying device for applying a second voltage between the first and third electrodes, the second voltage being higher than the first voltage; and (g) a diffusion layer made of a porous material and covering the second electrode to adjust transmission of the gas to the second electrode.

公开(公告)号：US07258771B2

公开(公告)日：2007-08-21

申请号：US10217534

申请日：2002-08-14

申请人： Shigeo Isitani ,  Yasuji Orimo ,  Chiharu Katsuyama ,  Futoshi Ichiyanagi

发明人： Shigeo Isitani ,  Yasuji Orimo ,  Chiharu Katsuyama ,  Futoshi Ichiyanagi

IPC分类号： G01N27/41

CPC分类号： G01N27/4118

摘要： The invention relates to an air/fuel ratio detection apparatus. This apparatus includes (a) a heater portion having an elongate cylindrical shape and heating by applying electricity thereto from outside; (b) a solid electrolyte layer surrounding the heater portion and being activated by heat to conduct oxygen ions therethrough; (c) first and second electrodes in contact with the solid electrolyte layer and being away from each other such that pumping voltage is applied by the first and second electrodes to the solid electrolyte layer; (d) a reference electrode for outputting an air/fuel ratio detection signal, the reference electrode being formed on the solid electrolyte layer and being away from the first and second electrodes; and (e) a diffusion layer made of a porous material and surrounding periphery of the solid electrolyte layer to cover the first and second electrodes and the reference electrode.

摘要翻译： 本发明涉及一种空燃比检测装置。 该装置包括（a）具有细长圆柱形状的加热器部分和从外部向其施加电力的加热; （b）固体电解质层，其围绕加热器部分并通过热量活化以使氧离子通过其中; （c）与固体电解质层接触并彼此远离的第一和第二电极，使得第一和第二电极向固体电解质层施加泵送电压; （d）用于输出空燃比检测信号的参考电极，所述参考电极形成在所述固体电解质层上并远离所述第一和第二电极; 和（e）由多孔材料制成的扩散层，并且围绕固体电解质层的周边覆盖第一和第二电极和参考电极。

公开(公告)号：US4471648A

公开(公告)日：1984-09-18

申请号：US386356

申请日：1982-06-08

申请人： Masaaki Uchida ,  Shigeo Isitani ,  Kohki Sone

发明人： Masaaki Uchida ,  Shigeo Isitani ,  Kohki Sone

IPC分类号： G01N27/12 ,  G01N27/409 ,  G05D23/24 ,  G01N27/26

CPC分类号： G01N27/12 ,  G05D23/2401

摘要： A temperature control system is disclosed wherein a heater of a gas sensor and a plurality of reference resistors cooperate to form a bridge circuit. The temperature control system comprises a comparator means for monitoring a balancing voltage of the bridge circuit and generating a control signal indicative of the balancing voltage and an electric power amplifier means responsive to the control signal for varying a voltage applied to the bridge circuit in such a manner to reduce the balancing voltage. The gas sensor has mounted therein at least one of the plurality of reference resistors, which reference resistor having a resistance resulting from multiplying the resistance of the heater with a constant.

摘要翻译： 公开了一种温度控制系统，其中气体传感器和多个参考电阻器的加热器协作以形成桥接电路。 温度控制系统包括比较器装置，用于监测桥接电路的平衡电压并产生指示平衡电压的控制信号;以及电功率放大器装置，响应控制信号改变施加在这种电路中的桥接电路的电压 降低平衡电压的方式。 气体传感器在其中安装有多个参考电阻器中的至少一个参考电阻器，其参考电阻器具有由加热器的电阻乘以常数而产生的电阻。

公开(公告)号：US4464244A

公开(公告)日：1984-08-07

申请号：US386427

申请日：1982-06-08

申请人： Masaaki Uchida ,  Shigeo Isitani

发明人： Masaaki Uchida ,  Shigeo Isitani

IPC分类号： G01N27/409 ,  G01N27/406 ,  G01N27/407 ,  G01N27/416 ,  G01N27/46

CPC分类号： G01N27/4071 ,  G01N27/4065 ,  G01N27/4067

摘要： A device for detecting concentrations of oxygen in gases by using an oxygen sensor element having a substrate provided with a heater and a concentration cell part in the form of a laminate including a solid electrolyte layer supported on the substrate. The device has a power supply circuit to apply a controlled voltage to the heater to keep it at a constant temperature by controlling its resistance to a constant value, and a current supply circuit which forces a controlled DC current to flow through the solid electrolyte layer in the sensor element to thereby maintain a reference oxygen partial pressure in the sensor element. The current supply circuit is electrically associated with the power supply circuit so as to vary the intensity of the current in inverse proportion to the voltage applied to the heater for the purpose of maintaining the reference oxygen partial presure constant even when the temperature of the concentration cell part of the sensor element varies depending on the temperature of the gas subject to measurement.

摘要翻译： 一种用于通过使用具有设置有加热器的基板的氧传感器元件和包括支撑在基板上的固体电解质层的层压体形式的浓缩单元部分来检测气体中的氧浓度的装置。 该装置具有电源电路，以通过控制其恒定值的电阻将受控电压施加到加热器以将其保持在恒定温度;以及电流供应电路，其强制受控直流电流流过固体电解质层 传感器元件，从而在传感器元件中保持参考氧分压。 电流供应电路与电源电路电连接，以便与施加到加热器的电压成反比地改变电流强度，以便即使当浓度电池的温度保持参考氧部分压力时， 传感器元件的一部分根据待测气体的温度而变化。