公开(公告)号：US07943024B2

公开(公告)日：2011-05-17

申请号：US11451825

申请日：2006-06-13

申请人： Kunihiko Nakagaki ,  Hideyuki Suzuki ,  Sang Jae Lee

发明人： Kunihiko Nakagaki ,  Hideyuki Suzuki ,  Sang Jae Lee

IPC分类号： G01N27/407

CPC分类号： G01N27/4075 ,  G01N27/4045

摘要： A technology which makes it possible to prolong the service life of a porous electrode constituted by a sintered body of an electrode metal material and a ceramic material, and the service life of an NOx sensor element having the porous electrode. The porous electrode is produced so as to have a total pore volute of at least 0.013 ml/g and a peak pore diameter of at least 0.31 μm as measured by mercury penetration method, by a process wherein a composition which includes the electrode material and the ceramic material and to which a vanishable solid material that vanishes by firing is formed into a thin film, which is then fired to form the sintered body which consists of the electrode material and the ceramic material and which has a multiplicity of pores formed as a result of vanishing of the vanishable solid material.

摘要翻译： 能够延长由电极金属材料和陶瓷材料的烧结体构成的多孔电极的使用寿命以及具有多孔电极的NOx传感器元件的使用寿命的技术。 通过以下方法制造多孔电极，使其具有至少0.013ml / g的总孔径和通过汞渗透法测量的至少0.31μm的峰值孔径，其中包括电极材料和 陶瓷材料，通过烧成而消失的可消除的固体材料形成为薄膜，然后将其烧制以形成由电极材料和陶瓷材料组成并且具有多个孔的结构的烧结体 消失的固体物质消失。

公开(公告)号：US07153402B2

公开(公告)日：2006-12-26

申请号：US10419392

申请日：2003-04-21

申请人： Kunihiko Nakagaki ,  Hideyuki Suzuki ,  Sang Jae Lee ,  Osamu Nakasone

发明人： Kunihiko Nakagaki ,  Hideyuki Suzuki ,  Sang Jae Lee ,  Osamu Nakasone

IPC分类号： G01N27/30 ,  G01N27/407

CPC分类号： G01N33/0037 ,  G01N27/4074 ,  Y02A50/245

摘要： A detecting electrode comprises a first cermet electrode layer formed directly on a solid electrolyte layer and a second cermet electrode layer formed on the first cermet electrode layer. The ratio between Pt and Rh in the first cermet electrode layer ranges from 100:0 to 25:75 by weight. The ratio between Pt and Rh in the second cermet electrode layer ranges from 25:75 to 0:100 by weight.

公开(公告)号：US07156966B2

公开(公告)日：2007-01-02

申请号：US10419391

申请日：2003-04-21

申请人： Kunihiko Nakagaki ,  Hideyuki Suzuki ,  Sang Jae Lee ,  Osamu Nakasone

发明人： Kunihiko Nakagaki ,  Hideyuki Suzuki ,  Sang Jae Lee ,  Osamu Nakasone

IPC分类号： G01N27/30 ,  G01N27/407

CPC分类号： B01D53/32 ,  B01D2257/404 ,  G01N27/419 ,  G01N33/0037 ,  Y02A50/245

摘要： A detecting electrode comprises a first cermet electrode layer formed directly on a solid electrolyte layer and a second cermet electrode layer formed on the first cermet electrode layer. A ratio between an alloy of Pt—Rh and ZrO2 in the first cermet electrode layer ranges from 20:80 to 50:50 by volume ratio. On the other hand, a ratio between an alloy of Pt—Rh and ZrO2 in the second cermet electrode layer ranges from 60:40 to 50:50 by volume ratio.

摘要翻译： 检测电极包括直接形成在固体电解质层上的第一金属陶瓷电极层和形成在第一金属陶瓷电极层上的第二金属陶瓷电极层。 第一金属陶瓷电极层中的Pt-Rh和ZrO 2的合金的比例为20:80至50:50（体积比）。 另一方面，第二金属陶瓷电极层中的Pt-Rh与ZrO 2的合金的比例为60:40〜50:50的体积比。

公开(公告)号：US07527718B2

公开(公告)日：2009-05-05

申请号：US11091349

申请日：2005-03-28

申请人： Kunihiko Nakagaki ,  Sang Jae Lee ,  Hiroyuki Shindo

发明人： Kunihiko Nakagaki ,  Sang Jae Lee ,  Hiroyuki Shindo

IPC分类号： G01N27/26

CPC分类号： G01N27/4074 ,  G01N27/419 ,  Y10T29/49002

摘要： A method of treating a gas sensor element for improving measurement characteristics thereof, including: heating the gas sensor element at a temperature of 600-1000° C. for 3-24 hours in a treatment atmosphere in which an oxygen concentration is regulated to be not higher than 0.2% and in which are included: (A) not lower than 1000 ppm of an adsorptive gas component wherein an adsorptive capable of being adsorbed on the measuring electrode is bound to oxygen; and (B) a combustible gas in an amount that can be substantially stoichiometrically oxidized by oxygen that is generated upon reduction or decomposition of the adsorptive gas component, so that the adsorptive gas component is reduced or decomposed for permitting the adsorptive in the adsorptive gas component to be adsorbed on the measuring electrode, and so that the noble metal material of the measuring electrode is reduced.

摘要翻译： 一种处理气体传感器元件以改善其测量特性的方法，包括：在氧浓度不被调节的处理气氛中，在600-1000℃的温度下加热气体传感器元件3-24小时 高于0.2％，其中包括：（A）不低于1000ppm的能够吸附在测量电极上的吸附剂与吸附气体组分结合; 和（B）可吸收气体组分被还原或分解后产生的氧气基本上化学计量氧化的可燃气体，使得吸附气体组分被还原或分解，以吸附吸附气体组分 被吸附在测量电极上，使得测量电极的贵金属材料减少。

公开(公告)号：US08409414B2

公开(公告)日：2013-04-02

申请号：US12349707

申请日：2009-01-07

申请人： Takeya Miyashita ,  Sang Jae Lee ,  Kunihiko Nakagaki

发明人： Takeya Miyashita ,  Sang Jae Lee ,  Kunihiko Nakagaki

IPC分类号： G01N27/26

CPC分类号： G01N27/4077 ,  G01N27/4072 ,  G01N27/417

摘要： A gas sensor and nitrogen oxide sensor, which, when fitted to the exhaust system of an internal combustion engine, can suppress the influence of harmful substances contained in a measurement gas and can prevent the reduction in sensitivity over time. A harmful substance-trapping layer is formed at a gas inlet for introducing a to-be-measured gas from an external space into an internal space, and in a buffering space formed between diffusion resistance portions. In a trap-formed portion of a gas passage in which the harmful substance-trapping layer is formed, the measurement gas can pass in an amount of 80% or more of when the harmful substance-trapping layer is not formed in the trap-formed portion. A diffusion resistance is attained in the diffusion resistance portions; a harmful substance is trapped in the harmful substance-trapping layer; and the measurement gas is allowed to flow into a detection electrode side.

摘要翻译： 一种气体传感器和氮氧化物传感器，当装配到内燃机的排气系统时，可以抑制测量气体中所含的有害物质的影响，并且可以防止随时间的灵敏度降低。 在气体入口形成有害物质捕获层，用于将待测气体从外部空间引入内部空间，并形成在扩散阻力部分之间形成的缓冲空间中。 在其中形成有害物质捕获层的气体通道的陷阱形成部分中，当陷阱形成的有害物质捕获层未形成时，测量气体可以通过80％以上的量 一部分。 在扩散电阻部分中获得扩散电阻; 有害物质被捕获在有害物质捕获层中; 使测定气体流入检测电极侧。

公开(公告)号：US06857316B2

公开(公告)日：2005-02-22

申请号：US10854728

申请日：2004-05-26

申请人： Hiroshi Kurachi ,  Nobukazu Ikoma ,  Sang Jae Lee

发明人： Hiroshi Kurachi ,  Nobukazu Ikoma ,  Sang Jae Lee

IPC分类号： G01N27/409 ,  F16J15/08 ,  G01N27/407 ,  G01N27/416 ,  G01N33/00 ,  G01N7/00 ,  G01D11/24

CPC分类号： G01N33/0037 ,  G01N27/4074 ,  Y02A50/245

摘要： A gas sensor includes a sensor element having a specific function, and a housing containing the sensor element therein and including a thread section, and a sealing surface which forms a sealing section together with an installation section at a position deeper than the thread section in a direction in which the sensor element is inserted. When the housing is screwed into the installation section, the release torque of the housing at 850° C. (1123 K) is 9 N·m or more, and an estimated value of a gap formed between the sealing surface and the installation section at 850° C. (1123 K) that is calculated according to a specific equation is 31 μm or less.

摘要翻译： 一种气体传感器包括具有特定功能的传感器元件和在其中容纳传感器元件并且包括螺纹部分的壳体，以及密封表面，其与安装部分一起形成在比螺纹部分更深的位置处的密封部分 传感器元件插入的方向。 当壳体拧入安装部分时，壳体在850℃（1123K）下的释放扭矩为9Nm或更大，并且密封表面和安装部分之间在850°处形成的间隙的估计值 根据特定方程式计算的C.（1123K）为31μm以下。

公开(公告)号：US08584504B2

公开(公告)日：2013-11-19

申请号：US12835946

申请日：2010-07-14

申请人： Takashi Ito ,  Sang Jae Lee

发明人： Takashi Ito ,  Sang Jae Lee

IPC分类号： G01N1/24 ,  G01N27/26

CPC分类号： G01N27/4077 ,  G01N27/4074 ,  G01N33/0054 ,  Y02A50/246

摘要： An ammonia concentration detection sensor 100, has: a sensor element 110 capable of detecting the ammonia concentration of a measurement target gas; and a protective cover 120 that regulates the inflow of the measurement target gas into the sensor element 110 and protects the sensor element 110. The protective cover 120 is coated with a coating layer.

摘要翻译： 氨浓度检测传感器100具有：能够检测测定对象气体的氨浓度的传感器元件110; 以及保护盖120，其调节测量目标气体流入传感器元件110中并保护传感器元件110.保护盖120涂覆有涂层。

公开(公告)号：US20110083490A1

公开(公告)日：2011-04-14

申请号：US12902458

申请日：2010-10-12

申请人： Mika MURAKAMI ,  Hiroki Fujita ,  Sumiko Horisaka ,  Takashi Ito ,  Sang Jae Lee

发明人： Mika MURAKAMI ,  Hiroki Fujita ,  Sumiko Horisaka ,  Takashi Ito ,  Sang Jae Lee

IPC分类号： G01N33/00

CPC分类号： G01N27/419 ,  G01N27/4071

摘要： A gas sensor includes an internal space, diffusion control part, pumping cell, and measuring cell. The diffusion control part communicates with the internal space and has a slit-like shape with a smaller thickness than that of the internal space. The pumping cell pumps out oxygen from the internal space when voltage is applied between a first electrode formed on a surface of the internal space and a second electrode formed outside the internal space. The measuring cell measures a current flowing between a third and fourth electrodes when a voltage is applied between the third and fourth electrodes. The third electrode is formed in the diffusion control part, and can reduce an oxide gas component in a predetermined gas component to which a predetermined diffusion resistance has been applied by the diffusion control part. The fourth electrode is formed in a part different from the diffusion control part.

摘要翻译： 气体传感器包括内部空间，扩散控制部分，泵浦单元和测量单元。 扩散控制部与内部空间连通，具有比内部空间小的狭缝形状。 当在形成在内部空间的表面上的第一电极和形成在内部空间外部的第二电极之间施加电压时，泵送单元从内部空间泵出氧气。 当在第三和第四电极之间施加电压时，测量单元测量在第三和第四电极之间流动的电流。 第三电极形成在扩散控制部分中，并且可以通过扩散控制部分减少已经施加预定扩散电阻的预定气体成分中的氧化物气体成分。 第四电极形成在与扩散控制部分不同的部分中。

公开(公告)号：US20110036715A1

公开(公告)日：2011-02-17

申请号：US12853527

申请日：2010-08-10

申请人： Sumiko HORISAKA ,  Sang Jae Lee ,  Kosuke Nakagawa

发明人： Sumiko HORISAKA ,  Sang Jae Lee ,  Kosuke Nakagawa

IPC分类号： G01N27/407

CPC分类号： G01N27/4071 ,  G01N27/419

摘要： A gas sensor having a sensor element that includes an inner space for introducing a measurement gas therein from an external space and a pump cell which has a first electrode formed on a surface of the inner space and a second electrode formed in a space different from the inner space and is provided to pump oxygen out of the inner space by applying a predetermined voltage between the first electrode and the second electrode. Assuming that the length of the inner space in a short-side direction of the sensor element as viewed from the front end portion side thereof is x1 and the length of the inner space in a longitudinal direction of the sensor element as viewed from the front end portion side thereof is x2, the following inequality is satisfied: 0.05≦x1/x2≦0.25.

摘要翻译： 一种具有传感器元件的气体传感器，该传感器元件包括用于从外部空间引入测量气体的内部空间和具有形成在所述内部空间的表面上的第一电极的泵电池和形成在与所述内部空间不同的空间中的第二电极 内部空间并且被提供以通过在第一电极和第二电极之间施加预定电压将氧气输送出内部空间。 假设从前端部侧观察传感器元件的短边方向的内部空间的长度为从前端观察时的传感器元件的长度方向的内部空间的长度 其部分侧为x2，满足以下不等式：0.05＆nlE; x1 / x2＆nlE; 0.25。

公开(公告)号：US08464573B2

公开(公告)日：2013-06-18

申请号：US12927886

申请日：2010-11-29

申请人： Takayuki Sekiya ,  Kei Kosaka ,  Sang Jae Lee

发明人： Takayuki Sekiya ,  Kei Kosaka ,  Sang Jae Lee

IPC分类号： G01N7/00 ,  G01N27/26

CPC分类号： G01N27/4077

摘要： A flow path from outer gas introduction apertures 144a to inner gas introduction apertures 134a has a narrower-width flow passage formed by an inner wall member 150. This structure effectively lowers the probability that a liquid, such as water, entering from the outer gas introduction apertures 144a passes through a gas inflow chamber 122 and reaches a sensor element 110, compared with a structure without the inner wall member 150. The inner wall member 150 is formed as a solid member that is capable of storing the surrounding heat. Even if there is a certain event that has the potential of causing a temperature decrease of the sensor element 110, for example, an abrupt change in flow rate of an object gas, the heat stored in the inner wall member 150 effectively prevents a temperature decrease of the sensor element 110. This structure prevents the occurrence of cracking in the sensor element 110, compared with a conventional sensor structure having a double-layered protective cover.

摘要翻译： 从外部气体引入孔144a到内部气体导入孔134a的流路具有由内壁构件150形成的较窄宽度的流路。该结构有效地降低了从外部气体导入口 与没有内壁构件150的结构相比，孔144a穿过气体流入室122并到达传感器元件110.内壁构件150形成为能够存储周围热量的实心构件。 即使存在导致传感器元件110的温度降低的可能性的某些事件，例如，目标气体的流量的突然变化，存储在内壁部件150中的热也有效地防止了温度降低 与具有双层保护罩的常规传感器结构相比，该结构防止了传感器元件110中的裂纹的发生。