公开(公告)号：US06210552B1

公开(公告)日：2001-04-03

申请号：US09199319

申请日：1998-11-25

申请人： Akio Mizutani ,  Teppei Okawa ,  Hiroshi Isomura ,  Hiroshi Kubota ,  Seiichi Hosogai ,  Hiroyuki Fujita

发明人： Akio Mizutani ,  Teppei Okawa ,  Hiroshi Isomura ,  Hiroshi Kubota ,  Seiichi Hosogai ,  Hiroyuki Fujita

IPC分类号： G01N27407

CPC分类号： G01N27/4071

摘要： 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.

摘要翻译： 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。

公开(公告)号：US4825683A

公开(公告)日：1989-05-02

申请号：US139295

申请日：1987-12-29

申请人： Akio Takami ,  Ken Minoha ,  Mineji Nasu ,  Toshifumi Sekiya ,  Toshitaka Matsuura ,  Akio Mizutani ,  Noriaki Kondo

发明人： Akio Takami ,  Ken Minoha ,  Mineji Nasu ,  Toshifumi Sekiya ,  Toshitaka Matsuura ,  Akio Mizutani ,  Noriaki Kondo

IPC分类号： G01N27/409 ,  G01N27/04 ,  G01N27/26 ,  G01N33/00 ,  G01D18/00

CPC分类号： G01N33/007 ,  G01N33/0006

摘要： An apparatus for evaluating an oxygen sensor includes a device for mixing a fuel and an oxygen-containing gas in an appropriate ratio to prepare a fuel mixture. A burner is connected to the mixing device for burning the fuel mixture to produce a gaseous combustion product. A tubular member extends from the burner for supplying the combustion product. A nozzle is connected to the tubular member for introducing a fuel and an oxygen-containing gas into the tubular member so that the combustion product is of a desired excess air ratio (air-fuel ratio) and a mounting device for the sensor to be evaluated is disposed on the tubular member, downstream of the nozzle.

公开(公告)号：US4932238A

公开(公告)日：1990-06-12

申请号：US247344

申请日：1988-09-21

申请人： Hideji Yoshida ,  Nobuhiro Hayakawa ,  Akio Mizutani ,  Tessho Yamada

发明人： Hideji Yoshida ,  Nobuhiro Hayakawa ,  Akio Mizutani ,  Tessho Yamada

IPC分类号： G05B6/02 ,  F02D41/14 ,  G01N27/00 ,  G01N27/04 ,  G01N27/12 ,  G01N27/26 ,  G01N27/419 ,  G05B5/01

CPC分类号： F02D41/1454 ,  G05B5/01 ,  F02D2041/281

摘要： A control system has a controlled element, such as an element for sensing an air/fuel ratio of an internal combustion engine, having a high order lag, a controller element connected with the controlled element to form a closed path, and a third element connected with the controlled element and controller element for modifying an output signal of the controlled element in accordance with an output signal of the controller element so that a phase angle in a frequency response of a loop transfer function of the controlled and controller elements does not reach -180.degree..

摘要翻译： 控制系统具有诸如用于感测具有高阶滞后的内燃机的空气/燃料比的元件的受控元件，与受控元件连接以形成闭合路径的控制器元件和连接到第三元件的第三元件 控制元件和控制器元件用于根据控制器元件的输出信号修改受控元件的输出信号，使得受控元件和控制器元件的环路传递函数的频率响应中的相位角未达到 - 180度。

公开(公告)号：US20070146960A1

公开(公告)日：2007-06-28

申请号：US11607004

申请日：2006-12-01

申请人： Toru Furuichi ,  Makoto Fukagai ,  Akio Mizutani

发明人： Toru Furuichi ,  Makoto Fukagai ,  Akio Mizutani

IPC分类号： H01H47/12

CPC分类号： G01N27/4118

摘要： A gas sensor and method of producing the same, the gas sensor including a sensor element extending along a longitudinal axis of the gas sensor; a metal shell surrounding the sensor element; and a protector fixed on a front portion of the metal shell and covering a front portion of the sensor element which projects from the front end of the metal shell, wherein an oil agent is present on one or both of an inner gas-receiving surface of the metal shell and an inner peripheral surface of the protector in a total amount of less than 0.7 mg.

摘要翻译： 一种气体传感器及其制造方法，所述气体传感器包括沿着所述气体传感器的纵向轴线延伸的传感器元件; 围绕传感器元件的金属壳; 以及固定在所述金属壳的前部上并覆盖从所述金属壳的前端突出的所述传感器元件的前部的保护器，其中在所述金属壳的内部气体接收表面的一个或两个上存在油剂 金属壳和保护膜的内周面总量小于0.7mg。

公开(公告)号：US6071554A

公开(公告)日：2000-06-06

申请号：US199551

申请日：1998-11-25

申请人： Hiroshi Isomura ,  Yukichika Ito ,  Akio Mizutani ,  Nobuhiro Hayakawa

发明人： Hiroshi Isomura ,  Yukichika Ito ,  Akio Mizutani ,  Nobuhiro Hayakawa

IPC分类号： G01N27/409 ,  C23C18/44 ,  G01N27/407 ,  B05D5/12

CPC分类号： C23C18/44 ,  G01N27/407 ,  G01N27/4075

摘要： Disclosed is a process for the formation of an electrode for sensor element which comprises the formation of a platinum electrode on a solid electrolyte formed in a predetermined shape as a sensor element by electroless plating, wherein said electroless plating is effected in a platinum (II) complex solution as a plating solution on which a reducing agent for reducing said platinum (II) complex is acted.

摘要翻译： 公开了一种用于形成传感器元件的电极的方法，其包括通过化学镀在形成为预定形状的固体电解质上形成铂电极作为传感器元件，其中所述无电镀在铂（II）中进行， 复合溶液作为其上用于还原所述铂（II）络合物的还原剂的电镀溶液。

公开(公告)号：US07467538B2

公开(公告)日：2008-12-23

申请号：US11607004

申请日：2006-12-01

申请人： Toru Furuichi ,  Makoto Fukagai ,  Akio Mizutani

发明人： Toru Furuichi ,  Makoto Fukagai ,  Akio Mizutani

IPC分类号： G01N37/00 ,  B05D1/18

CPC分类号： G01N27/4118

摘要： A gas sensor and method of producing the same, the gas sensor including a sensor element extending along a longitudinal axis of the gas sensor; a metal shell surrounding the sensor element; and a protector fixed on a front portion of the metal shell and covering a front portion of the sensor element which projects from the front end of the metal shell, wherein an oil agent is present on one or both of an inner gas-receiving surface of the metal shell and an inner peripheral surface of the protector in a total amount of less than 0.7 mg.

摘要翻译： 一种气体传感器及其制造方法，所述气体传感器包括沿着所述气体传感器的纵向轴线延伸的传感器元件; 围绕传感器元件的金属壳; 以及固定在所述金属壳的前部上并覆盖从所述金属壳的前端突出的所述传感器元件的前部的保护器，其中在所述金属壳的内部气体接收表面的一个或两个上存在油剂 金属壳和保护膜的内周面总量小于0.7mg。

公开(公告)号：US06182498B2

公开(公告)日：2001-02-06

申请号：US09236336

申请日：1999-01-25

申请人： Akio Mizutani ,  Teppei Okawa ,  Hiroshi Kubota ,  Seiichi Hosogai ,  Hiroyuki Fujita

发明人： Akio Mizutani ,  Teppei Okawa ,  Hiroshi Kubota ,  Seiichi Hosogai ,  Hiroyuki Fujita

IPC分类号： G01N1910

CPC分类号： G01N27/4077

摘要： An oxygen sensor is disposed behind an exhaust gas purifying catalyst for an internal combustion engine and which suppresses the influence of unburnt hydrocarbon on the output voltage. A sensor element 1 is provided with a detection electrode 4 on the outer face of a zirconia ceramic body 2, a reference electrode 3 on the inner face of the ceramic body 2 and a spinel protective layer 5 on the outer surface of the detection electrode 4. The tip end of the sensor element 1 is covered with a protective cover 10 which is provided with an outer partition wall 11 having through holes 11a and an inner partition wall 12 having through holes 12a. In a case where the pressure difference between the inside and outside of the protective cover 10 is &Dgr;P(atm) when the atmospheric air with a volume flow rate Q(L/min) is passed into the protective cover 10 from the outside, the ratio &Dgr;P/Q2 is 3.2×10−5 (atm·min2·L−2). When the surface temperature of the sensor element 1 is changed in a range of sensor active temperature, the reversing time is substantially constant. Therefore, the catalyst deterioration can be detected by the oxygen sensor with high accuracy.

摘要翻译： 氧传感器设置在用于内燃机的废气净化催化剂的后面，并且抑制未燃烧的碳氢化合物对输出电压的影响。 传感器元件1在氧化锆陶瓷体2的外表面上设置有检测电极4，陶瓷体2的内表面上的参考电极3和检测电极4的外表面上的尖晶石保护层5 传感器元件1的前端用保护盖10覆盖，保护盖10设有具有通孔11a的外分隔壁11和具有通孔12a的内分隔壁12。 在体积流量Q（L / min）从外部进入保护罩10的大气中，保护罩10的内外压差为DELTAP（atm）的情况下， DELTAP / Q2为3.2×10-5（atm.min2.L-2）。 当传感器元件1的表面温度在传感器有效温度的范围内变化时，反转时间基本上是恒定的。 因此，可以通过氧传感器高精度地检测催化剂劣化。

公开(公告)号：US5288389A

公开(公告)日：1994-02-22

申请号：US32187

申请日：1993-03-15

申请人： Tessho Yamada ,  Akio Mizutani ,  Nobuhiro Hayakawa

发明人： Tessho Yamada ,  Akio Mizutani ,  Nobuhiro Hayakawa

IPC分类号： F02B75/02 ,  G01N27/407 ,  G01N27/417 ,  G01N27/419

CPC分类号： G01N27/4073 ,  G01N27/4071 ,  G01N27/417 ,  F02B2075/027

摘要： An oxygen sensor including, at least, a) an oxygen pump element having a solid electrolyte plate and two porous electrodes, one on each surface of the solid electrolyte plate, b) a gas diffusion chamber facing one of the porous electrodes, and c) a gas diffusion path connecting the gas diffusion chamber and the ambience of the oxygen sensor, is defined its thickness between 0.7 to 1.25 mm, and its width between 2.8 to 4.0 mm. The restricted size renders higher resistance against repeated thermal shocks, and shorter warming-up time, which leads to greater accuracy and higher responsiveness in the oxygen content measurement.

摘要翻译： 一种氧传感器，至少包括a）具有固体电解质板和两个多孔电极的氧气泵元件，在所述固体电解质板的每个表面上一个，b）朝向所述多孔电极之一的气体扩散室，以及c） 连接气体扩散室的气体扩散路径和氧传感器的气氛被定义为其在0.7至1.25mm之间的厚度，其宽度在2.8至4.0mm之间。 受限制的尺寸对反复的热冲击具有更高的阻力，并且更短的预热时间，这导致更高的精度和更高的氧含量测量的响应性。