公开(公告)号：US5976350A

公开(公告)日：1999-11-02

申请号：US920722

申请日：1997-08-29

申请人： Tessho Yamada ,  Takeshi Kawai ,  Yuji Oi ,  Shigeki Mori ,  Satoshi Teramoto ,  Toshiya Matsuoka

发明人： Tessho Yamada ,  Takeshi Kawai ,  Yuji Oi ,  Shigeki Mori ,  Satoshi Teramoto ,  Toshiya Matsuoka

IPC分类号： G01N27/419 ,  F02D41/14 ,  G01N27/406 ,  G01N27/407

CPC分类号： F02D41/1494 ,  G01N27/4065

摘要： A method of detecting an activated condition of a wide range air-fuel ratio sensor is provided. With this method, application of a current to a heater is started idiately after an engine is started (S00). Then, a current Icp for pumping is passed through an electromotive force cell (S10). A lapse of a predetermined time Tin is waited for (S18). After a lapse of time Tin, a voltage Vs across both electrodes of the electromotive force cell is detected (S20) and labeled as Vs0 (S22). Then, application of Icp is suspended (S30) and a routine is held on standby until a time of 25 ms elapses (S35). At the point of time when the time of 25 ms has elapsed, the voltage across the electrodes on the opposite sides of the electromotive force cell is detected (S40) and labeled as Vs1 (S45). A resistance value Rs1 is calculated from Vs0, Vs1 and Icp (S50). The resistance value Rs1 is compared with a value Rss which has been prepared previously (S55) and it is judged, when Rs1 is smaller than Rss, that the electromotive force cell has been put into an activated condition. An apparatus for detecting an activated condition of a wide range air-fuel ratio sensor is also provided.

摘要翻译： 提供一种检测大范围空燃比传感器的激活状态的方法。 利用这种方法，在发动机启动之后，将电流施加到加热器（S00）。 然后，使电流Icp通过电动势电池（S10）。 等待经过预定时间锡（S18）。 经过一段时间后，检测到电动势单元的两个电极之间的电压Vs（S20）并标记为Vs0（S22）。 然后，停止应用Icp（S30），并且程序保持待机直到25ms的时间过去（S35）。 在经过25ms的时间的时刻，检测到电动势单元的相对侧的电极两端的电压（S40），标记为Vs1（S45）。 从Vs0，Vs1和Icp计算电阻值Rs1（S50）。 将电阻值Rs1与先前准备的值Rss进行比较（S55），当Rs1小于Rss时，判断为电动势单元已经处于激活状态。 还提供了用于检测大范围空燃比传感器的激活状态的装置。

公开(公告)号：US6099717A

公开(公告)日：2000-08-08

申请号：US965420

申请日：1997-11-06

申请人： Tessho Yamada ,  Takeshi Kawai ,  Yuji Oi ,  Shigeki Mori ,  Satoshi Teramoto ,  Toshiya Matsuoka

发明人： Tessho Yamada ,  Takeshi Kawai ,  Yuji Oi ,  Shigeki Mori ,  Satoshi Teramoto ,  Toshiya Matsuoka

IPC分类号： F02D41/14 ,  G01N27/407

CPC分类号： F02D41/1495 ,  F02D41/1474 ,  F02D41/1476

摘要： A method of detecting a deteriorated condition of a wide range air-fuel ratio sensor is provided. Firstly, a current is applied to an electromotive force cell to detect a voltage Vs0 across electrodes on opposite side surfaces of the cell. Application of the current is suspended, and a voltage drop Vsd1 across the electrodes is detected after lapse of a time ranging from 10 .mu.s to 1 ms after the application of the current is suspended. Based on the voltage drop Vsd1 is detected a first resistance value Rvs1 equated to the temperature of the electromotive force cell. Further, after lapse of a time ranging from 10 ms to 50 ms after the application of the current to the electromotive force cell is suspended, a voltage drop Vsd2 across the electrodes of the electromotive force cell is detected. Based on the voltage drop Vsd2 is detected a second resistance value Rvs2 equated to an internal resistance of the electromotive force cell including a resistance component resulting from deterioration. By comparison of the resistance values Rvs1 and Rvs2, the deteriorated condition of the wide range air-fuel ratio is detected. An apparatus for carrying out such a method is also provided.

摘要翻译： 提供了一种检测宽范围空燃比传感器劣化状况的方法。 首先，将电流施加到电动势单元以检测电池的相对侧表面上的电极之间的电压Vs0。 电流的施加被暂停，在暂停施加电流之后经过10μs至1ms的时间之后，检测电极两端的电压降Vsd1。 基于电压降Vsd1，检测到等于电动势单元的温度的第一电阻值Rvs1。 此外，在将电流施加到电动势电池之后经过了10ms至50ms的时间之后，检测到电动势单元的电极两端的电压降Vsd2。 基于电压降Vsd2，检测到等于包括由劣化导致的电阻分量的电动势单元的内部电阻的第二电阻值Rvs2。 通过比较电阻值Rvs1和Rvs2，检测宽范围空燃比的恶化条件。 还提供了一种用于执行这种方法的设备。

公开(公告)号：US6120677A

公开(公告)日：2000-09-19

申请号：US903940

申请日：1997-07-31

申请人： Tessho Yamada ,  Takeshi Kawai ,  Yuji Oi ,  Shigeki Mori ,  Satoshi Teramoto ,  Toshiya Matsuoka

发明人： Tessho Yamada ,  Takeshi Kawai ,  Yuji Oi ,  Shigeki Mori ,  Satoshi Teramoto ,  Toshiya Matsuoka

IPC分类号： F02D41/14 ,  G01N27/406 ,  G01N27/407

CPC分类号： G01N27/4065 ,  F02D41/1494

摘要： A constant current Iconst is applied to an electromotive force cell which is interposed between a gap (measurement chamber) of a fixed atmosphere and an oxygen reference chamber of a constant oxygen content, for measurement of a resistance value of the electromotive force cell, whereby the resistance value can be measured accurately irrespective of an oxygen content in an atmosphere to be measured by an oxygen sensor element or cell unit. The resistance value of the electromotive force cell is measured at a predetermined timing T2 after application of a current is started, so that a measure resistance value is free of a variation of a resistance value due to deterioration of porous electrodes of an electromotive force cell, such a variation being included in the measured resistance value in case the measurement is done by using an AC current, and therefore accurate measurement can be attained. A temperature control methods and a temperature control apparatus for an oxygen sensor, capable of detecting the temperature accurately without suspending measurement of an oxygen content for a long period of time are also provided. Further, a temperature control method and a temperature control apparatus for an oxygen sensor, capable of detecting not only the temperature of the electromotive force cell but the temperature of the pump cell by applying a current or voltage to the electromotive force cell are provided.

摘要翻译： 将恒定电流Iconst应用于介于固定气氛的间隙（测量室）和恒定氧含量的氧气参考室之间的电动势单元，用于测量电动势单元的电阻值，由此 可以精确地测量电阻值，而不管氧传感器元件或电池单元测量的气氛中的氧含量如何。 在施加电流开始之后，在预定定时T2测量电动势电池的电阻值，使得测量电阻值不会由于电动势电池的多孔电极的劣化而导致的电阻值的变化， 在通过使用AC电流进行测量的情况下，这种变化被包括在测量的电阻值中，因此可以获得精确的测量。 还提供了一种用于氧传感器的温度控制方法和温度控制装置，其能够准确地检测温度而不长时间地测量氧气含量。 此外，提供了一种用于氧传感器的温度控制方法和温度控制装置，其不仅可以通过向电动势单元施加电流或电压来检测电动势单元的温度，而且可以检测泵室的温度。

公开(公告)号：US5700367A

公开(公告)日：1997-12-23

申请号：US636401

申请日：1996-04-23

申请人： Tessho Yamada ,  Katsuhisa Yabuta ,  Takeshi Kawai ,  Hideki Toyoda

发明人： Tessho Yamada ,  Katsuhisa Yabuta ,  Takeshi Kawai ,  Hideki Toyoda

IPC分类号： F02D41/14 ,  G01N27/406 ,  G01N27/419 ,  G01N27/409

CPC分类号： G01N27/419 ,  F02D41/1494 ,  G01N27/4065

摘要： An oxygen sensor according to the present invention has battery element and a pump element in each of which porous electrodes are disposed on both faces of a solid electrolyte substrate. A minute current is supplied to the battery element after the start of energizing a heater and the activation of the sensor elements are judged on the basis of an interelectrode voltage generated at this energizing. A heater voltage is set to be 12V at the start of energizing. When the time period necessary for the interelectrode voltage to reach a predetermined voltage is short, the applied voltage is lowered to 11V. As a result, the time period necessary for judging the sensor elements to be activated can be made substantially constant irrespective of variations in sensor characteristics. After the activation judgment, the variation of the temperature of the sensor element is monitored on the basis of the interelectrode voltage. When the element temperature is varied, the heater voltage is raised or lowered so that the element temperature is stabilized.

摘要翻译： 根据本发明的氧传感器具有电池元件和泵元件，其中每个多孔电极设置在固体电解质基板的两个面上。 在开始加热加热器之后，向电池元件供给微小的电流，并且基于在该通电时产生的电极间电压来判断传感器元件的启动。 在通电开始时，加热器电压设定为12V。 当电极间电压达到预定电压所需的时间段短时，施加的电压降低到11V。 结果，无论传感器特性的变化如何，可以使用于判断要激活的传感器元件所需的时间段基本上是恒定的。 在激活判断之后，基于电极间电压来监测传感器元件的温度变化。 当元件温度变化时，加热器电压升高或降低，使元件温度稳定。

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：US6010366A

公开(公告)日：2000-01-04

申请号：US14619

申请日：1998-01-28

申请人： Fumiyoshi Tanigawa ,  Tessho Yamada ,  Yoshihide Kami

发明人： Fumiyoshi Tanigawa ,  Tessho Yamada ,  Yoshihide Kami

IPC分类号： H01R13/66 ,  H01R43/24

CPC分类号： H01R13/6608 ,  H01R43/24 ,  Y10S439/907

摘要： A branch metal terminal has a branch lead terminal portion with a branch wire connected to this terminal portion through a branch female metal terminal. The branch wire is connected to a female-side wire connected to a mold-type electronic part.

摘要翻译： 分支金属端子具有分支引线端子部分，其分支线通过分支母金属端子连接到该端子部分。 分支线连接到连接到模具型电子部件的阴侧线。

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：US4808269A

公开(公告)日：1989-02-28

申请号：US142298

申请日：1988-01-04

申请人： Tomohiko Kawanabe ,  Masahiko Asakura ,  Noritaka Kushida ,  Hiroshi Hasebe ,  Tessho Yamada

发明人： Tomohiko Kawanabe ,  Masahiko Asakura ,  Noritaka Kushida ,  Hiroshi Hasebe ,  Tessho Yamada

IPC分类号： G01N27/419 ,  G01N27/27 ,  G01N27/406 ,  G01N27/409 ,  G01N27/46

CPC分类号： G01N27/4065

摘要： A method of controlling an oxygen concentration sensor of the type having oxygen pump and sensor cell elements spaced from each other to form a gap or a restricted region both of which are to be placed in some gases containing an oxygen component, and a heater element for heating said oxygen pump and sensor cell elements under energization of a heater current supplied thereto.A pump current is supplied to the oxygen pump element as long as the heater current is supplied to the heater element. However, the initiation of the supply of the pump current is somewhat delayed at the initial stage of the supply of the heater current in order to avoid incorrect operation due to the unstable cool state of the sensor, and to present possible flow of excessive pump current through the pump element which would cause deterioration of the oxygen pump element.

摘要翻译： 一种控制氧浓度传感器的方法，所述氧浓度传感器具有彼此间隔开的氧气泵和传感器单元元件，以形成间隙或受限制的区域，两者都被放置在含有氧组分的一些气体中，以及用于 在供给其的加热器电流的通电下加热所述氧气泵和传感器电池元件。 只要将加热器电流提供给加热器元件，泵电流就被供应给氧气泵元件。 然而，在供电加热器电流的初始阶段，启动泵电流的供应有些延迟，以避免由于传感器的不稳定的冷却状态引起的不正确的操作，并且提供过大的泵电流的可能的流量 通过泵元件，这将导致氧气泵元件的劣化。

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。