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。

公开(公告)号：US5047137A

公开(公告)日：1991-09-10

申请号：US915839

申请日：1986-10-06

申请人： Tetsusyo Yamada ,  Takao Kojima ,  Hiroyuki Ishiguro ,  Yoshihide Kami

发明人： Tetsusyo Yamada ,  Takao Kojima ,  Hiroyuki Ishiguro ,  Yoshihide Kami

IPC分类号： G01N27/41 ,  F02D41/14 ,  G01N27/403 ,  G01N27/406 ,  G01N27/407 ,  G01N27/409 ,  G01N27/416 ,  G01N27/417

CPC分类号： G01N27/417 ,  G01N27/4065

摘要： An air/fuel ratio sensor with a solid electrolyte oxygen pump and oxygen sensor defining a closed space therebetween. At least in the oxygen pump, porous electrodes sandwich an ionic oxygen conductive solid electrolyte. The voltage impressed on the electrodes of the pump is limited to a predetermined level, e.g., 6 V, in order to prevent blackening and cracking.

摘要翻译： 具有固体电解质氧气泵和氧气传感器的空气/燃料比传感器，其间限定了它们之间的封闭空间。 至少在氧气泵中，多孔电极夹着离子导电固体电解质。 为了防止黑化和破裂，施加在泵的电极上的电压被限制在预定水平，例如6V。

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。

公开(公告)号：US5849165A

公开(公告)日：1998-12-15

申请号：US408132

申请日：1995-03-21

申请人： Takao Kojima ,  Hiroyuki Ishiguro ,  Masaru Yamano ,  Toshiki Sawada ,  Kazuo Taguchi ,  Masahiko Yamada ,  Noriaki Kondo

发明人： Takao Kojima ,  Hiroyuki Ishiguro ,  Masaru Yamano ,  Toshiki Sawada ,  Kazuo Taguchi ,  Masahiko Yamada ,  Noriaki Kondo

IPC分类号： G01N27/407 ,  G01N27/416 ,  G01N27/12 ,  G01N27/409 ,  G01N27/41

CPC分类号： G01N27/4075 ,  G01N27/4077

摘要： Oxygen sensor element (ZrO.sub.2 solid electrolyte etc) for detecting oxygen concentration in an exhaust gas has a protective layer which is made of a heat-resistant metal oxide and which carries a component of a IIa subgroup element (Ca, Mg etc) on the side exposed to the exhaust gas of the sensor element, at least a part of the protective layer being present as a nonstoichiometric compound (Ti oxide etc) with respect to the heat-resistant metal oxide. Si-poisoning is prevented. Heater for heating the sensor element is provided for preventing Si-poisoning at low temperatures.

摘要翻译： 用于检测排气中的氧浓度的氧传感器元件（ZrO 2固体电解质等）具有由耐热性金属氧化物构成的保护层，该保护层在侧面具有IIa族成分元素（Ca，Mg等）的成分 暴露于传感器元件的废气中，保护层的至少一部分作为非化学计量的化合物（Ti氧化物等）相对于耐热金属氧化物存在。 预防中毒。 提供用于加热传感器元件的加热器用于在低温下防止Si中毒。

公开(公告)号：US4806739A

公开(公告)日：1989-02-21

申请号：US136438

申请日：1987-12-17

申请人： Takao Kojima ,  Hiroyuki Ishiguro ,  Yoshiki Kawachi ,  Tetsusyo Yamada

发明人： Takao Kojima ,  Hiroyuki Ishiguro ,  Yoshiki Kawachi ,  Tetsusyo Yamada

IPC分类号： H05B3/20 ,  H05B3/28 ,  H05B3/26

CPC分类号： H05B3/283

摘要： A heater including an electron-conductive pattern designed to generate heat, which has a partially and/or entirely stabilized ZrO.sub.2 -base substrate, an Al.sub.2 O.sub.3 -base coating layer disposed on the surface of the substrate, and an electron-conductive pattern to generate heat disposed on the coating layer.

摘要翻译： 一种包括设计成产生热量的电子传导图案的加热器，其具有部分和/或完全稳定的ZrO 2基底基板，设置在基板表面上的Al 2 O 3基涂层以及产生热量的电子传导图案 设置在涂层上。

公开(公告)号：US4733056A

公开(公告)日：1988-03-22

申请号：US896863

申请日：1986-08-15

申请人： Takao Kojima ,  Hiroyuki Ishiguro

发明人： Takao Kojima ,  Hiroyuki Ishiguro

IPC分类号： H05B3/12 ,  F01N3/027 ,  H01C7/00 ,  H05B3/16 ,  H05B3/28 ,  H01C1/012

CPC分类号： H05B3/283 ,  F01N3/027

摘要： A heater backed with a ceramic substrate having a ceramic substrate as a base plate and heating element formed thereon, which comprises a conductor for retaining ionized elements, said conductor branching from a terminal lead portion of the minus side connected to the heater element under an applied electric current and extending at the back side of the base plate, along the heating element pattern at least partly thereof. A protecting layer may be provided on the surface of said conductor. The conductor is connected with the lead portion through a conducting through hole.

摘要翻译： 背衬有陶瓷基板的加热器，其具有陶瓷基板作为基板和形成在其上的加热元件，该陶瓷基板包括用于保持电离元件的导体，所述导体从负侧的端子引线部分分支，连接到加热元件， 电流，并且在基板的背面沿其加热元件图案至少部分延伸。 可以在所述导体的表面上设置保护层。 导体通过导电孔与引线部分连接。

公开(公告)号：US5443711A

公开(公告)日：1995-08-22

申请号：US997137

申请日：1992-12-22

申请人： Takao Kojima ,  Hiroyuki Ishiguro ,  Masaru Yamano ,  Noriaki Kondo ,  Masahiko Yamada ,  Toshiki Sawada

发明人： Takao Kojima ,  Hiroyuki Ishiguro ,  Masaru Yamano ,  Noriaki Kondo ,  Masahiko Yamada ,  Toshiki Sawada

IPC分类号： G01N27/409 ,  G01N27/406 ,  G01N27/407 ,  G01N27/41 ,  G01N27/417

CPC分类号： G01N27/4075 ,  G01N27/4077

摘要： Oxygen-sensor element comprises reference-gas-side and detection-gas-side electrodes on both surfaces of a solid-electrolyte body, and a porous protective layer on the surface of the detection-gas-side electrode, wherein at least a part (including at least a surface layer) of said porous protective layer is formed by a granular texture of a grain size of 0.1 to 0.5 .mu.m formed mainly of a nonstoichiometric compound of a transition metal oxide (TiO.sub.x), and a catalyst for having gas components of the gas to be measured react is carried in at least a part (including at least a surface layer) of the porous protective layer. Oxidation reaction of gas components is improved to prevent deterioration of the responsive property.

摘要翻译： 氧传感器元件包括在固体电解质体的两个表面上的参考气体侧和检测气体侧电极，以及在检测气体侧电极的表面上的多孔保护层，其中至少一部分 所述多孔保护层的至少包含表面层的至少一个表面层由主要由过渡金属氧化物（TiOx）的非化学计量化合物形成的粒径为0.1〜0.5μm的颗粒结构形成，以及具有气体成分的催化剂 被测量的气体在多孔保护层的至少一部分（包括至少表面层）中进行反应。 提高了气体成分的氧化反应，防止了反应性的劣化。

公开(公告)号：US5160598A

公开(公告)日：1992-11-03

申请号：US479695

申请日：1990-02-14

申请人： Toshiki Sawada ,  Masaru Yamano ,  Kazuo Taguchi ,  Takao Kojima ,  Hiroyuki Ishiguro ,  Masahiko Yamada

发明人： Toshiki Sawada ,  Masaru Yamano ,  Kazuo Taguchi ,  Takao Kojima ,  Hiroyuki Ishiguro ,  Masahiko Yamada

IPC分类号： B41M1/34 ,  C04B35/49 ,  C04B41/87 ,  C04B41/88 ,  C23C4/10 ,  C23C24/08 ,  G01N27/407 ,  G01N27/416 ,  G01N27/417

CPC分类号： G01N27/4075 ,  G01N27/407 ,  G01N27/4077 ,  G01N27/4078

摘要： Oxygen sensor for air-fuel ratio control is provided with a sensor element having an oxygen ion-conductive main body and electrodes on both sides thereof, and at least one porous protective layer covering the electrode on the exhaust gas side. The protective layer includes an oxygen storage component OSC without copresence of a noble metal catalyst. The protective layer is intermeshingly connected to the main body via spherical protrusions of the main body. Double-layered protective layer structure includes OSC noncontaining layer (optionally containing catalyst) and OSC containing layer, as inner and outer protective layer or vice versa. OSC containing layer is formed by impregnation with OSC-solution through immersing the respective porous protective layer, or by cosintering the OSC containing green coating layer. By impregnation 0.2 -8 wt %, or by cosintering 0.2-30 wt %, of OSC metal element is containable. The outer protective layer is thinner and more porous than the inner protective layer. Any of the protective layers can be formed by flame spraying.

摘要翻译： 用于空燃比控制的氧传感器设置有具有氧离子传导主体和两侧的电极的传感器元件和覆盖排气侧的电极的至少一个多孔保护层。 保护层包括没有贵金属催化剂共存的储氧组分OSC。 保护层通过主体的球形突起与主体啮合连接。 双层保护层结构包括OSC不含层（任选地含有催化剂）和含有OSC的层，作为内部和外部保护层，反之亦然。 通过浸渍相应的多孔保护层或通过使包含OSC的绿色涂层进行同步化而通过用OSC溶液浸渍形成含OSC层。 通过浸渍0.2-8重量％，或通过0.2-30重量％的OSC金属元素的串联连接是可含有的。 外保护层比内保护层薄且多孔。 可以通过火焰喷涂形成任何保护层。

公开(公告)号：US4629549A

公开(公告)日：1986-12-16

申请号：US751269

申请日：1985-07-02

申请人： Takao Kojima ,  Yutaka Nakayama ,  Hiroyuki Ishiguro ,  Tetsusyo Yamada

发明人： Takao Kojima ,  Yutaka Nakayama ,  Hiroyuki Ishiguro ,  Tetsusyo Yamada

IPC分类号： G01N27/41 ,  G01N27/406 ,  G01N27/409 ,  G01N27/413 ,  G01N27/417 ,  G01N27/419 ,  G01N27/58

CPC分类号： G01N27/417 ,  G01N27/4065

摘要： In an oxygen sensor which is provided with an oxygen pump element having electrodes on both front and rear surfaces of a solid electrolyte plate with oxygen ion conductive property, voltage from an external power source is applied between the electrodes and a pumping current flows between the electrodes. Thereby oxygen is pumped out of ambient gases to be measured through a member including a gap with oxygen diffusion limiting property. The limit value of the pumping current accompanied by the oxygen pumping is determined or the oxygen concentration difference produced before and after the diffusive motion of oxygen through the member or oxygen concentration produced after the diffusive motion of oxygen through the member is measured. Thereby the oxygen concentration of the ambient gases is calculated. The oxygen sensor comprises a heater unit installed on the solid electrolyte plate of the oxygen pump element through an electric insulation layer, and a lead wire unit of one electrode of the oxygen pump element connected at one end to the heater unit. Thus the oxygen sensor is excellent in energy saving, detection accuracy, and reduction of use amount of electrode lead wires.

摘要翻译： 在具有氧气泵元件的氧气传感器中，在具有氧离子传导性的固体电解质板的前表面和后表面上具有电极，在电极之间施加来自外部电源的电压，并且在电极之间流过泵浦电流 。 因此，氧被从包括具有氧扩散限制性能的间隙的构件中被泵出待测量的环境气体。 确定伴随氧气泵送的泵送电流的极限值，或测量通过构件的氧扩散运动之前和之后产生的氧浓度差异或氧气通过构件的扩散运动后产生的氧浓度。 由此计算环境气体的氧气浓度。 氧传感器包括通过电绝缘层安装在氧泵元件的固体电解质板上的加热器单元，一端连接到加热器单元的氧气泵元件的一个电极的引线单元。 因此，氧传感器具有优异的节能性，检测精度和电极引线的使用量的减少。

公开(公告)号：US5326597A

公开(公告)日：1994-07-05

申请号：US840829

申请日：1992-02-25

申请人： Toshiki Sawada ,  Masaru Yamano ,  Kazuo Taguchi ,  Takao Kojima ,  Hiroyuki Ishiguro ,  Masahiko Yamada

发明人： Toshiki Sawada ,  Masaru Yamano ,  Kazuo Taguchi ,  Takao Kojima ,  Hiroyuki Ishiguro ,  Masahiko Yamada

IPC分类号： B41M1/34 ,  C04B35/49 ,  C04B41/87 ,  C04B41/88 ,  C23C4/10 ,  C23C24/08 ,  G01N27/407 ,  G01N27/416 ,  G01N27/417 ,  B05D1/00 ,  B05D1/18 ,  B05D1/36 ,  B05D5/12

CPC分类号： G01N27/4075 ,  G01N27/407 ,  G01N27/4077 ,  G01N27/4078

摘要： Oxygen sensor for air-fuel ratio control is provided with a sensor element having an oxygen ion-conductive main body and electrodes on both sides thereof, and at least one porous protective layer covering the electrode on the exhaust gas side. The protective layer includes an oxygen storage component OSC without copresence of a noble metal catalyst. The protective layer is intermeshingly connected to the main body via spherical protrusions of the main body. Double-layered protective layer structure includes OSC noncontaining layer (optionally containing catalyst) and OSC containing layer, as inner and outer protective layer or vice versa. OSC containing layer is formed by impregnation with OSC-solution through immersing the respective porous protective layer, or by cosintering the OSC containing green coating layer. By impregnation 0.2-8 wt %, or by cosintering 0.2-30 wt %, of OSC metal element is containable. The outer protective layer is thinner and more porous than the inner protective layer. Any of the protective layers can be formed by flame spraying.

摘要翻译： 用于空燃比控制的氧传感器设置有具有氧离子传导主体和两侧的电极的传感器元件和覆盖排气侧的电极的至少一个多孔保护层。 保护层包括没有贵金属催化剂共存的储氧组分OSC。 保护层通过主体的球形突起与主体啮合连接。 双层保护层结构包括OSC不含层（任选地含有催化剂）和含有OSC的层，作为内部和外部保护层，反之亦然。 通过浸渍相应的多孔保护层或通过使包含OSC的绿色涂层进行同步化而通过用OSC溶液浸渍形成含OSC层。 通过浸渍0.2-8wt％，或通过0.2-30wt％的OSC金属元素的串联连接是可含有的。 外保护层比内保护层薄且多孔。 可以通过火焰喷涂形成任何保护层。