公开(公告)号：US4322383A

公开(公告)日：1982-03-30

申请号：US179222

申请日：1980-08-18

申请人： Eturo Yasuda ,  Susumu Sato ,  Yoshihiro Segawa ,  Tadashi Hattori ,  Keiji Aoki

发明人： Eturo Yasuda ,  Susumu Sato ,  Yoshihiro Segawa ,  Tadashi Hattori ,  Keiji Aoki

IPC分类号： G01N27/12 ,  G01N27/16 ,  G01N33/00 ,  H01C13/00

CPC分类号： H01C13/00 ,  G01N27/12 ,  G01N27/16 ,  G01N33/0031

摘要： A gas component detection apparatus comprises a first and a second gas sensing elements each composed of a metal oxide which exhibits variable electric resistances according to gaseous components and temperatures of gases to be detected. A catalyst is carried at least by the first sensing element for promoting oxidation reactions of the gaseous components of the gases. A first pair of electrodes are inserted into those portions of the first sensing element which are subjected to catalytic action of the catalyst. Into the portions of the second sensing element which are not subjected to catalytic action are inserted a second pair of electrodes. The first pair of electrodes sense a variation in electric resistances resulting from the gaseous components and temperatures of the gases, while the second pair of electrodes detect an electric resistance variation related mainly upon the gas temperatures. Consequently, an output signal reflecting substantially only the gaseous components of the gases is produced by offsetting both of the electric resistances separately sensed utilizing a suitable electric circuit.

摘要翻译： 气体成分检测装置包括第一和第二气体检测元件，每个气体检测元件由金属氧化物组成，金属氧化物根据气体成分和待检测气体的温度呈现可变的电阻。 催化剂至少由第一感测元件承载，用于促进气体的气体组分的氧化反应。 将第一对电极插入到受催化剂催化作用的第一感测元件的那些部分中。 在不进行催化作用的第二传感元件的部分插入第二对电极。 第一对电极感测由气体组分和气体温度导致的电阻变化，而第二对电极检测主要基于气体温度的电阻变化。 因此，基本上仅反映气体的气体成分的输出信号是通过使用合适的电路单独检测的两个电阻抵消而产生的。

公开(公告)号：US4066413A

公开(公告)日：1978-01-03

申请号：US662956

申请日：1976-03-01

申请人： Yoshihiro Segawa ,  Susumu Sato ,  Eturo Yasuda ,  Tadashi Hattori ,  Keiji Aoki

发明人： Yoshihiro Segawa ,  Susumu Sato ,  Eturo Yasuda ,  Tadashi Hattori ,  Keiji Aoki

IPC分类号： F02D41/14 ,  G01N27/12 ,  G01N27/16

CPC分类号： F02D41/1455 ,  G01N27/12

摘要： A gas component detection apparatus for detecting gas components contained in an exhaust gas from a combustion device and determining an air-fuel ratio of an air-fuel mixture supplied thereto. A gas component detecting element composed of a semiconductive metal oxide is contacted by the exhaust gas andexhibits variable electric resistances according to the concentrations of the gas components. The electric resistance is taken out as an electric signal through two electrodes disposed either on the surface of the detecting element exposed to the exhaust gas or within the detecting element adjacent that exposed surface. A porous coating layer having an exhaust gas permeability covers the surface of the detecting element exposed to the exhaust gas so as to prevent poisonous substances contained in the exhaust gas from depositing on that exposed surface of the detecting element. The coating layer is formed of a metal oxide having electrically insulating properties and carries therein a catalyst promoting an oxidation reaction of the exhaust gas. The detecting element exhibits an abruptly changed electric resistance when the actual air-fuel ratio of the air-fuel mixture supplied into the combustion device is deviated from a stoichiometrical air-fuel ratio, thereby enabling the control of the air-fuel ratio of the air-fuel mixture.

公开(公告)号：US4244918A

公开(公告)日：1981-01-13

申请号：US899397

申请日：1978-04-24

申请人： Eturo Yasuda ,  Susumu Sato ,  Yoshihiro Segawa ,  Tadashi Hattori ,  Keiji Aoki

发明人： Eturo Yasuda ,  Susumu Sato ,  Yoshihiro Segawa ,  Tadashi Hattori ,  Keiji Aoki

IPC分类号： G01N27/12 ,  G01N27/16 ,  G01N33/00 ,  H01C13/00

CPC分类号： H01C13/00 ,  G01N27/12 ,  G01N27/16 ,  G01N33/0031

摘要： A gas component detection apparatus comprises a first and a second gas sensing elements each composed of a metal oxide which exhibits variable electric resistances according to gaseous components and temperatures of gases to be detected. A catalyst is carried at least by the first sensing element for promoting oxidation reactions of the gaseous components of the gases. A first pair of electrodes are inserted into those portions of the first sensing element which are subjected to catalytic action of the catalyst. Into the portions of the second sensing element which are not subjected to catalytic action are inserted a second pair of electrodes. The first pair of electrodes sense a variation in electric resistances resulting from the gaseous components and temperatures of the gases, while the second pair of electrodes detect an electric resistance variation related mainly upon the gas temperatures. Consequently, an output signal reflecting substantially only the gaseous components of the gases is produced by offsetting both of the electric resistances separately sensed utilizing a suitable electric circuit.

摘要翻译： 气体成分检测装置包括第一和第二气体检测元件，每个气体检测元件由金属氧化物组成，金属氧化物根据气体成分和待检测气体的温度呈现可变的电阻。 催化剂至少由第一感测元件承载，用于促进气体的气体组分的氧化反应。 将第一对电极插入到受催化剂催化作用的第一感测元件的那些部分中。 在不进行催化作用的第二传感元件的部分插入第二对电极。 第一对电极感测由气体组分和气体温度导致的电阻变化，而第二对电极检测主要基于气体温度的电阻变化。 因此，基本上仅反映气体的气体成分的输出信号是通过使用合适的电路单独检测的两个电阻抵消而产生的。

公开(公告)号：US4099922A

公开(公告)日：1978-07-11

申请号：US751956

申请日：1976-12-17

申请人： Eturo Yasuda ,  Susumu Sato ,  Yoshihiro Segawa ,  Tadashi Hattori ,  Keiji Aoki

发明人： Eturo Yasuda ,  Susumu Sato ,  Yoshihiro Segawa ,  Tadashi Hattori ,  Keiji Aoki

IPC分类号： G01N27/12 ,  G01N27/16

CPC分类号： G01N27/12

摘要： A gas component detection apparatus for detecting gaseous components of exhaust gases from a combustion device. There is provided a gas component detecting element composed of semiconductive metal oxides and having its outer surface partly exposed to the exhaust gases. A catalyst layer is carried on the larger part of the latter outer surface of the detecting element. A pair of electrodes are provided for sensing the electric resistance exhibited at the portion of the detecting element which carries the catalyst layer. Also another electrode is provided for cooperating with one of the above pair of electrodes to detect the electric resistance exhibited at the portion of the detecting element which does not carry the catalyst layer. The former portion of the detecting element exhibits variable electric resistances resulting from concentrations of the gaseous components and the temperatures of the exhaust gases, while the latter portion thereof exhibits variable electric resistances related mainly upon the temperatures of the exhaust gases. Consequently, an output signal reflecting substantially only the gaseous components of the exhaust gases is produced by offsetting both of the electric resistances separately sensed utilizing a suitable electric circuit.

摘要翻译： 一种用于检测来自燃烧装置的废气的气体成分的气体成分检测装置。 提供了由半导体金属氧化物构成的气体成分检测元件，其外表面部分地暴露于废气中。 催化剂层承载在检测元件的后一个外表面的较大部分上。 提供一对电极用于感测在携带催化剂层的检测元件的部分处呈现的电阻。 还提供另一个电极，用于与上述一对电极中的一个电极配合，以检测在不携带催化剂层的检测元件的部分处呈现的电阻。 检测元件的前一部分呈现由气体组分的浓度和废气的温度导致的可变电阻，而后者部分呈现出与废气温度有关的可变电阻。 因此，基本上仅反映废气的气体成分的输出信号是通过使用合适的电路单独感测的两个电阻来抵消而产生的。

公开(公告)号：US4346585A

公开(公告)日：1982-08-31

申请号：US213104

申请日：1980-12-04

申请人： Eturo Yasuda ,  Yoshihiro Segawa ,  Minoru Ohta

发明人： Eturo Yasuda ,  Yoshihiro Segawa ,  Minoru Ohta

IPC分类号： G01N27/12 ,  G01N27/04

CPC分类号： G01N27/12

摘要： A gas detector used with an automobile exhaust gas purifier system is disclosed, in which that part of the gas detector element of a sintered metal oxide which is located between electrodes for picking up a detected output has the thickness of 0.1 mm to 0.6 mm.

摘要翻译： 公开了一种与汽车废气净化器系统一起使用的气体检测器，其中位于用于拾取检测输出的电极之间的金属氧化物烧结体的气体检测元件的部分的厚度为0.1mm至0.6mm。

公开(公告)号：US4294801A

公开(公告)日：1981-10-13

申请号：US169162

申请日：1980-07-15

申请人： Yoshihiro Segawa ,  Minoru Ohta ,  Eturo Yasuda

发明人： Yoshihiro Segawa ,  Minoru Ohta ,  Eturo Yasuda

IPC分类号： G01N27/12 ,  G01N27/04

CPC分类号： G01N27/12 ,  Y10T436/205831 ,  Y10T436/214 ,  Y10T436/22

摘要： A gas component detector for detecting a gas component in the exhaust gases includes a detector element of a metal oxide whose electrical resistance value varies suddenly depending on the gas component. The detector element is held on an electrically insulating and heat-resistant holding body and furthermore, the detector element is enclosed by a catalyst carrier body which is fixed to the holding body by an inorganic bonding adhesive. Since the catalyst carrier body is of a porous heat-resistant metal oxide, the exhaust gases to be detected are permitted to pass through the catalyst carrier body and the gas component is oxidated by the aid of a catalyst material carried on the carrier body. The environment of the detector element thus becomes a weak reducing environment thereby preventing the detector element from being reduced and deteriorated.

摘要翻译： 用于检测废气中的气体成分的气体成分检测器包括金属氧化物的检测元件，其电阻值根据气体成分突然变化。 检测器元件保持在电绝缘和耐热的保持体上，此外，检测器元件由通过无机粘合粘合剂固定到保持体的催化剂载体主体包围。 由于催化剂载体为多孔耐热金属氧化物，因此允许检测的废气通过催化剂载体，借助载体上携带的催化剂材料使气体成分氧化。 因此，检测器元件的环境变成弱的还原环境，从而防止检测器元件的减少和劣化。

公开(公告)号：US4287751A

公开(公告)日：1981-09-08

申请号：US958681

申请日：1978-11-08

申请人： Eturo Yasuda ,  Yoshihiro Segawa ,  Minoru Ohta

发明人： Eturo Yasuda ,  Yoshihiro Segawa ,  Minoru Ohta

IPC分类号： G01N27/12 ,  G01N27/04

CPC分类号： G01N27/12

摘要： A gas detector used with an automobile exhaust gas purifier system is disclosed, in which that part of the gas detector element of a sintered metal oxide which is located between electrodes for picking up a detected output has the thickness of 0.1 mm to 0.6 mm.

摘要翻译： 公开了一种与汽车废气净化器系统一起使用的气体检测器，其中位于用于拾取检测输出的电极之间的金属氧化物烧结体的气体检测元件的部分的厚度为0.1mm至0.6mm。

公开(公告)号：US4236138A

公开(公告)日：1980-11-25

申请号：US19402

申请日：1979-03-12

申请人： Yoshihiro Segawa ,  Minoru Ohta ,  Eturo Yasuda

发明人： Yoshihiro Segawa ,  Minoru Ohta ,  Eturo Yasuda

IPC分类号： G01N27/04 ,  G01N27/12 ,  H01L7/00

CPC分类号： G01N27/12

摘要： A gas component detector has a detector element of a metal oxide held on one end of a ceramic body. The detector element is exposed to the gases to be detected and the electrical resistance value thereof is varied depending on the component of the gases. An electrical signal representing an electrical resistance value of the detector element is delivered through a pair of electrodes connected to the detector element and further through a pair of sub-lead-lines connected to the electrodes. The pairs of electrodes and sub-lead-lines are inserted in a pair of penetrating holes of the ceramic body after the electrodes and sub-lead-lines have been welded to each other. The ceramic body is inserted in a metal tube and the ceramic body and the metal tube are fixed to each other either by a tight surface contact or an adhesive. The openings of the pair of penetrating holes of the ceramic body at the opposite end with respect to the detector element are closed by a sealing material of an electrically insulating metal oxide.

摘要翻译： 气体成分检测器具有保持在陶瓷体一端的金属氧化物的检测元件。 检测器元件暴露于要检测的气体，并且其电阻值根据气体的成分而变化。 表示检测器元件的电阻值的电信号通过连接到检测器元件的一对电极进一步通过连接到电极的一对副引线来传送。 在电极和副引线彼此焊接之后，将电极对和副引线对插入陶瓷体的一对穿透孔中。 将陶瓷体插入金属管中，陶瓷体和金属管通过紧密的表面接触或粘合剂彼此固定。 相对于检测器元件的相对端的陶瓷体的一对穿透孔的开口由电绝缘金属氧化物的密封材料封闭。

公开(公告)号：US4260978A

公开(公告)日：1981-04-07

申请号：US40874

申请日：1979-05-21

申请人： Eturo Yasuda ,  Yoshihiro Segawa ,  Minoru Ohta

发明人： Eturo Yasuda ,  Yoshihiro Segawa ,  Minoru Ohta

IPC分类号： G01N27/12 ,  H01L7/00

CPC分类号： G01N27/12

摘要： A gas detector element comprising a sintered material of a metal oxide, the electric resistivity of which varies depending on an oxidative atmosphere or a reductive atmosphere of the inflammable gas composition, said gas detector element being characterized in that the size of the composing particles of said sintered material is in the range from 0.5.mu. to 5.mu. in an equivalent circle diameter.

摘要翻译： 一种气体检测元件，其特征在于，所述气体检测元件包括金属氧化物的烧结材料，所述金属氧化物的电阻率根据所述易燃气体组合物的氧化气氛或还原气氛而变化，其特征在于，所述气体检测元件的所述组成粒子的尺寸 烧结材料的当量圆直径为0.5〜5μm。

公开(公告)号：US4258563A

公开(公告)日：1981-03-31

申请号：US953955

申请日：1978-10-23

申请人： Eturo Yasuda ,  Yoshihiro Segawa ,  Minoru Ohta

发明人： Eturo Yasuda ,  Yoshihiro Segawa ,  Minoru Ohta

IPC分类号： F02D41/14 ,  G01N27/04 ,  G01N27/12

CPC分类号： F02D41/1455 ,  G01N27/122

摘要： A gas sensor including a gas sensing element whose electrical resistance varies in accordance with the gas composition in the exhaust gas, especially the oxygen content in the exhaust gas, and a reference resistor connected in series with the gas sensing element. A predetermined voltage is applied across the series circuit of the gas sensing element and the reference resistor to detect the gas composition in the exhaust gas by a voltage at the junction point of the gas sensing element and the reference resistor. The gas sensor further comprises a circuit for monitoring the voltage at the junction point and another circuit responsive to the monitoring circuit to change the resistance of the reference resistor so that when the voltage at the junction point exceeds the predetermined range, the resistance of the reference resistor is changed such that the voltage at the junction point may change within the predetermined range in the state after the reference resistor is changed to ensure that the voltage at the junction point properly indicates the gas composition even if the resistance of the gas sensing element changes with the operating temperature of the gas sensing element or with time.

摘要翻译： 一种气体传感器，其包括气体传感元件，其电阻根据排气中的气体组成，特别是废气中的氧含量而变化，以及与气体感测元件串联连接的参考电阻。 在气体感测元件和参考电阻器的串联电路之间施加预定电压，以通过气体感测元件和参考电阻器的接合点处的电压来检测排气中的气体成分。 气体传感器还包括用于监测接合点处的电压的电路和响应于监视电路的另一电路，以改变参考电阻器的电阻，使得当接合点处的电压超过预定范围时，参考电阻 改变电阻器，使得在参考电阻器改变之后的状态下，接合点处的电压可能在预定范围内改变，以确保即使气体感测元件的电阻改变，接合点处的电压也适当地指示气体组成 与气体感测元件的工作温度或时间。