公开(公告)号：US5357750A

公开(公告)日：1994-10-25

申请号：US1225

申请日：1993-01-06

申请人： Yasuo Ito ,  Nobuhiro Hayakawa ,  Tessho Yamada

发明人： Yasuo Ito ,  Nobuhiro Hayakawa ,  Tessho Yamada

IPC分类号： F01N11/00 ,  F01N3/20

CPC分类号： F01N11/007 ,  F01N2550/02 ,  Y02T10/22 ,  Y02T10/47

摘要： The invention provides a method for accurately and precisely detecting deterioration of a catalyst and measuring a conversion efficiency of a catalyst for HC/CO/NOx by using an oxygen sensor and an air/fuel ratio sensor disposed on the upstream and downstream sides of the catalyst, respectively. The catalyst is determined to be deteriorating when an output amplitude of the air/fuel ratio sensor becomes greater than a predetermined value. The conversion efficiency of the catalyst is determined based on a predetermined relationship between the output amplitude and the mean converted rate of HC/CO/NOx.

摘要翻译： 本发明提供一种准确，准确地检测催化剂劣化的方法，并且通过使用设置在催化剂的上游侧和下游侧的氧传感器和空气/燃料比传感器来测量HC / CO / NO x催化剂的转化效率 ， 分别。 当空气/燃料比传感器的输出振幅变得大于预定值时，确定催化剂变质。 催化剂的转化效率基于HC / CO / NOx的输出振幅和平均转化率之间的预定关系来确定。

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。

公开(公告)号：US5174885A

公开(公告)日：1992-12-29

申请号：US596438

申请日：1990-10-12

申请人： Nobuhiro Hayakawa ,  Tessho Yamada

发明人： Nobuhiro Hayakawa ,  Tessho Yamada

IPC分类号： G01N27/26 ,  G01N27/406 ,  G01N27/417 ,  G01N27/419

CPC分类号： G01N27/417

摘要： The invention provides an air/fuel ratio sensor, including an electrochemical sensor cell and an electrochemical pump cell, which shows both a quick response and a stable limiting current. This is realized by limiting the ratio of the area a of a region A to the area b of a region B on the inner electrode of the electrochemical sensor within a specified range, 0

公开(公告)号：US5433830A

公开(公告)日：1995-07-18

申请号：US186650

申请日：1994-01-26

申请人： Takeshi Kawai ,  Nobuhiro Hayakawa ,  Tessho Yamada

发明人： Takeshi Kawai ,  Nobuhiro Hayakawa ,  Tessho Yamada

IPC分类号： G01N27/419 ,  G01N27/26

CPC分类号： G01N27/419

摘要： Activation treatment for a zirconia oxygen sensor is performed by applying alternately a treating voltage, which can make an oxygen partial pressure at the electrode-zirconia interface of a sensor equal to or higher than a critical oxygen partial pressure value (10.sup.-34 atm) not to cause blackening, between a pair of electrodes of the sensor at temperatures of 500.degree. to 800.degree. C. As a result, the treatment current flowing through the sensor can always be held below the critical level, whereby the sensor can be activated without causing blackening and other physical structural changes to occur in the zirconia sensing element. If the sensor is to be used in an A/F ratio control or the like on an internal combustion engine, it can be rendered active at all times by the activation treatment during or before or after the control.

摘要翻译： 氧化锆氧传感器的激活处理通过交替施加处理电压来进行，该处理电压可以使传感器的电极 - 氧化锆界面处的氧分压等于或高于临界氧分压值（10-34atm）而不是 在500〜800℃的温度下在传感器的一对电极之间引起黑化。结果，流过传感器的处理电流总是能够保持在临界水平以下，从而可以激活传感器而不引起 氧化锆感应元件中发生黑化和其他物理结构变化。 如果将传感器用于内燃机上的A / F比控制等，则可以通过在控制期间或控制之后或之后的激活处理始终使其变为活动状态。

公开(公告)号：US06344134B1

公开(公告)日：2002-02-05

申请号：US09232001

申请日：1999-01-15

申请人： Tessho Yamada ,  Noboru Ishida ,  Toshitaka Matsuura ,  Yoshiro Noda ,  Nobuhiro Hayakawa ,  Norihiko Nadanami ,  Satoshi Sugaya ,  Takaki Otsuka ,  Masashi Ando ,  Takafumi Oshima

发明人： Tessho Yamada ,  Noboru Ishida ,  Toshitaka Matsuura ,  Yoshiro Noda ,  Nobuhiro Hayakawa ,  Norihiko Nadanami ,  Satoshi Sugaya ,  Takaki Otsuka ,  Masashi Ando ,  Takafumi Oshima

IPC分类号： G01N27407

CPC分类号： G01N27/417

摘要： An apparatus and method using a two-serial space sensor (having first and second internal spaces 2,3) for accurately measuring NOx concentration in gas, e.g., exhausted from an internal combustion engine. Both NOx (nitrogen oxide) and oxygen are forced to be partially dissociated in the first space 2 to an oxygen concentration level of 2×10−7 to 2×10−10 atm by pumping out oxygen from the first space 2. The NOx concentration is determined based on the second current measured in the second space 4 and based on the NO dissociation percentage in the first chamber which is 0.5-50%, or preferably 2-20%. The NOx measurement accuracy is further improved when the above oxygen concentration level is maintained from 2×10−8 to 2×10−9 and the temperature drift of the sensor is maintained within ±5° C. under a sensor temperature range of 700-900° C.

摘要翻译： 一种使用两串联空间传感器（具有第一和第二内部空间2,3）的装置和方法，用于精确测量例如从内燃机排出的气体中的NOx浓度。 通过从第一空间2中抽出氧，迫使NOx（氮氧化物）和氧在第一空间2中部分地离解为2x10-7至2×10-10大气压的氧浓度水平。基于 在第二空间4中测量的第二电流，并且基于第一室中的NO解离百分比为0.5-50％，或优选2-20％。 在700-900℃的传感器温度范围内，当上述氧气浓度水平保持在2×10 -8至2×10 -9，并且传感器的温度漂移保持在±5℃以内时，NOx测量精度进一步提高。

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：US5157921A

公开(公告)日：1992-10-27

申请号：US683633

申请日：1991-04-11

申请人： Yasuo Ito ,  Nobuhiro Hayakawa

发明人： Yasuo Ito ,  Nobuhiro Hayakawa

IPC分类号： G01N27/00 ,  B01D53/86 ,  B01D53/94 ,  F01N3/20 ,  F01N11/00 ,  F02D45/00

CPC分类号： F01N11/007 ,  F01N2550/02 ,  Y02T10/22 ,  Y02T10/47

摘要： The invention provides a method for accurately and precisely measuring a converted rate of a catalyst for HC/CO/NOx, NOx, and HC/CO and detecting deterioration using two air/fuel ratio sensors disposed on the upstream and downstream sides of the catalyst. The converted rate of the catalyst is determined based on a predetermined relationship between the mean converted rate and a reduction ratio of output amplitudes of the downstream sensor to the upstream sensor. The catalyst is determined to be deteriorating when the reduction ratio becomes less than a predetermined value.

摘要翻译： 本发明提供一种准确且精确地测量HC / CO / NO x，NO x和HC / CO的催化剂的转化速率并使用设置在催化剂的上游和下游侧的两个空气/燃料比传感器来检测劣化的方法。 基于平均转换速率和下游传感器与上游传感器的输出振幅的减小比之间的预定关系来确定催化剂的转化速率。 当减速比变得小于预定值时，催化剂被确定为劣化。

公开(公告)号：US20120203471A1

公开(公告)日：2012-08-09

申请号：US13434185

申请日：2012-03-29

申请人： Tomohiro Hara ,  Shigehiro Nukatsuka ,  Akiyoshi Sato ,  Nobuhiro Hayakawa ,  Takeshi Adachi

发明人： Tomohiro Hara ,  Shigehiro Nukatsuka ,  Akiyoshi Sato ,  Nobuhiro Hayakawa ,  Takeshi Adachi

IPC分类号： G06F19/00

CPC分类号： G06Q50/06

摘要： A generation source estimation apparatus of a diffusion material is featured by including: an observation information acquisition section which acquires position information, and measured concentration information from each of the observers; a virtual grid setting section which sets virtual discharge points on a virtual grid; an influence function calculation section which calculates influence functions; a residual norm calculation section which calculates, for each of the virtual discharge points, a residual norm that is the sum of squares of a difference between the concentration information acquired from each of the observers, and the product of the influence function associating the virtual discharge point with each of the observers, and the discharge intensity at the virtual discharge point; and an estimation section which estimates, as a discharge point, the virtual discharge point corresponding to the residual norm smallest among the residual norms calculated respectively for all the virtual discharge points.

摘要翻译： 扩散材料的生成源估计装置的特征在于包括：观察信息获取部，其从各观察者获取位置信息和测量的浓度信息; 虚拟网格设置部，其在虚拟网格上设置虚拟放电点; 影响函数计算部，计算影响函数; 剩余范数计算部，针对每个虚拟放电点，计算作为从每个观察者获取的浓度信息之间的差的平方和的残差，以及与虚拟放电相关联的影响函数的乘积 每个观察者点和虚拟放电点的放电强度; 以及估计部分，作为放电点，估计对应于分别针对所有虚拟放电点计算的残差范数中的最小残留量的虚拟放电点。

公开(公告)号：US5279886A

公开(公告)日：1994-01-18

申请号：US645870

申请日：1991-01-25

申请人： Takeshi Kawai ,  Nobuhiro Hayakawa ,  Harumi Aiba

发明人： Takeshi Kawai ,  Nobuhiro Hayakawa ,  Harumi Aiba

IPC分类号： C04B35/111 ,  C04B35/119 ,  H01C7/00 ,  H05B3/14 ,  H05B3/28 ,  C01F17/00

CPC分类号： H05B3/283 ,  C04B35/119 ,  H05B3/14 ,  Y10S428/901 ,  Y10T428/24917 ,  Y10T428/24926

摘要： The present invention provides an improved alumina sintered body on which a heater electrode is printed and which is sintered simultaneously with the heater electrode at temperatures lower than the optimum value 1,520.degree. C. The alumina sintered body includes high purity of alumina and 2 through 18% by weight partially stabilized zirconia, which further contains 2 through 6 mole percent solid solution of an oxide or oxides selected from Y.sub.2 O.sub.3, Sc.sub.2 O.sub.3, and lanthanum series metal oxides. The high purity of alumina may contain 0.1% by weight alkaline metals and/or alkaline earth metals and 1.0% by weight SiO.sub.2 at most. In the alumina sintered body of the invention, segregation and migration of impurities and chipping are effectively prevented and hence the durability of the sintered body is highly improved. Use of the alumina sintered body of the invention as a heater base makes the durability of a heater much longer.

摘要翻译： 本发明提供了一种改进的氧化铝烧结体，其上印刷有加热器电极，并且在低于最佳值1520℃的温度下与加热器电极同时烧结。氧化铝烧结体包括高纯度的氧化铝和2至18％ 其还含有选自Y 2 O 3，Sc 2 O 3和镧系金属氧化物的氧化物或氧化物的2〜6摩尔％固溶体的部分稳定化的氧化锆。 氧化铝的高纯度最多可以含有0.1重量％的碱金属和/或碱土金属和1.0重量％的SiO 2。 在本发明的氧化铝烧结体中，有效地防止了杂质的偏析和迁移，并且因此高度提高了烧结体的耐久性。 使用本发明的氧化铝烧结体作为加热器基座使得加热器的耐久性更长。

公开(公告)号：US4935119A

公开(公告)日：1990-06-19

申请号：US832798

申请日：1986-02-25

申请人： Tetsusyo Yamada ,  Nobuhiro Hayakawa

发明人： Tetsusyo Yamada ,  Nobuhiro Hayakawa

IPC分类号： G01N27/419 ,  G01N27/12 ,  G01N27/407 ,  G01N27/417

CPC分类号： G01N27/417

摘要： An air/fuel ratio sensor is described, comprising an oxygen pump element composed of a solid electrolyte having a pair of electrodes on opposite sides thereof, a gas diffusing section section that is in contact with one electrode on said oxygen pump element and which accepts a limited inflow of a gas to be analyzed, and an oxygen gas detecting element that is based on a transition metal oxide disposed within said gas diffusing section, the resistance of which varies in proportion to the partial pressure of oxygen gas in the gas to be analyzed.

摘要翻译： 描述了一种空气/燃料比传感器，包括由在其相对侧上具有一对电极的固体电解质构成的氧气泵元件，与所述氧气泵元件上的一个电极接触并且接受 待分析气体的有限流入和基于设置在所述气体扩散部内的过渡金属氧化物的氧气检测元件，其电阻与待分析气体中的氧气分压成比例变化 。