公开(公告)号：US09823220B2

公开(公告)日：2017-11-21

申请号：US13398095

申请日：2012-02-16

申请人： Kenji Kato ,  Kouji Shiotani ,  Takeshi Kawai ,  Satoshi Teramoto

发明人： Kenji Kato ,  Kouji Shiotani ,  Takeshi Kawai ,  Satoshi Teramoto

IPC分类号： G01N27/419

CPC分类号： G01N27/419

摘要： An apparatus and method for individually detecting NO and NO2 concentrations as NOX components of an object gas. An NO concentration corresponding value is obtained from a first detection element not having a reduction section. An NO concentration corresponding value is obtained from a second detection element having a reduction section, and having an NO2/NO sensitivity ratio greater than that of the first detection element. The difference ΔC between the NO concentration corresponding values of the two detection elements is obtained, and divided by the difference ΔS between the NO2/NO sensitivity ratios of the two detection elements, whereby an NO2 concentration corresponding value is obtained. A value obtained by multiplying the NO2 concentration corresponding value by the NO2/NO sensitivity ratio of the second detection element is subtracted from the NO concentration corresponding value of the second detection element, whereby an NO concentration corresponding value is obtained.

公开(公告)号：US07964073B2

公开(公告)日：2011-06-21

申请号：US11604218

申请日：2006-11-27

申请人： Masamichi Hiraiwa ,  Takeshi Kawai ,  Satoshi Teramoto ,  Shigeki Mori ,  Hiroshi Inagaki

发明人： Masamichi Hiraiwa ,  Takeshi Kawai ,  Satoshi Teramoto ,  Shigeki Mori ,  Hiroshi Inagaki

IPC分类号： G01N27/419

CPC分类号： G01N27/419

摘要： Using a gas detection voltage Vs output from a terminal CU, a determination is made at to whether, after startup of an air-fuel ratio detection apparatus (1), a full-range air-fuel ratio sensor (10) has reached a semi-activated state in which a determination can be made as to whether the air-fuel ratio is on the rich or lean side based on a change in a gas detection signal Vic. After determining that the sensor has reached the semi-activated state, the signal Vic is compared with a threshold to determine whether the air-fuel ratio is on the rich or lean side. In the apparatus (1), the potential difference between an outer pump electrode of a pump cell (14) and a reference electrode of an oxygen concentration measurement cell (24) is obtained via a first differential amplification circuit (53) as the gas detection signal Vic, the signal Vic being highly responsive to a change in air-fuel ratio of exhaust gas.

摘要翻译： 使用从端子CU输出的气体检测电压Vs，判定在空燃比检测装置（1）启动后，全范围空燃比传感器（10）到达半空 基于气体检测信号Vic的变化，能够进行空燃比是富气还是偏侧的判定。 在确定传感器已经达到半激活状态之后，将信号Vic与阈值进行比较，以确定空燃比是富有还是偏侧。 在装置（1）中，通过作为气体检测器的第一差分放大电路（53）获得泵电池（14）的外泵电极与氧浓度测定电池（24）的参比电极之间的电位差 信号Vic，信号Vic对废气的空燃比变化高度响应。

公开(公告)号：US20070119437A1

公开(公告)日：2007-05-31

申请号：US11604218

申请日：2006-11-27

申请人： Masamichi Hiraiwa ,  Takeshi Kawai ,  Satoshi Teramoto ,  Shigeki Mori ,  Hiroshi Inagaki

发明人： Masamichi Hiraiwa ,  Takeshi Kawai ,  Satoshi Teramoto ,  Shigeki Mori ,  Hiroshi Inagaki

IPC分类号： G01N27/41

CPC分类号： G01N27/419

摘要： Using a gas detection voltage Vs output from a terminal CU, a determination is made at to whether, after startup of an air-fuel ratio detection apparatus (1), a full-range air-fuel ratio sensor (10) has reached a semi-activated state in which a determination can be made as to whether the air-fuel ratio is on the rich or lean side based on a change in a gas detection signal Vic. After determining that the sensor has reached the semi-activated state, the signal Vic is compared with a threshold to determine whether the air-fuel ratio is on the rich or lean side. In the apparatus (1), the potential difference between an outer pump electrode of a pump cell (14) and a reference electrode of an oxygen concentration measurement cell (24) is obtained via a first differential amplification circuit (53) as the gas detection signal Vic, the signal Vic being highly responsive to a change in air-fuel ratio of exhaust gas.

摘要翻译： 使用从端子CU输出的气体检测电压Vs，判定在空燃比检测装置（1）启动后，全范围空燃比传感器（10）到达半空 基于气体检测信号Vic的变化，能够进行空燃比是富气还是偏侧的判定。 在确定传感器已经达到半激活状态之后，将信号Vic与阈值进行比较，以确定空燃比是富有还是偏侧。 在装置（1）中，通过作为气体检测器的第一差分放大电路（53）获得泵电池（14）的外泵电极与氧浓度测定电池（24）的参比电极之间的电位差 信号Vic，信号Vic对废气的空燃比变化高度响应。

公开(公告)号：US08877024B2

公开(公告)日：2014-11-04

申请号：US12957641

申请日：2010-12-01

申请人： Takeshi Kawai ,  Hiroshi Inagaki ,  Koji Shiotani ,  Hirotaka Onogi ,  Satoshi Teramoto

发明人： Takeshi Kawai ,  Hiroshi Inagaki ,  Koji Shiotani ,  Hirotaka Onogi ,  Satoshi Teramoto

IPC分类号： G01N27/409 ,  G01N27/417

CPC分类号： G01N27/419 ,  F02D41/1454 ,  F02D41/146 ,  F02D41/1494 ,  F02D41/2432 ,  F02D41/2474 ,  G01N27/407

摘要： [Objective] An object is to provide a sensor control apparatus and a sensor-control-apparatus control method which can reduce variation in startup time among a plurality of times of execution of detection processing, in consideration of variation in output characteristic among a plurality of gas sensors.[Means for Solution] In a sensor control apparatus, before drive control (S55 to S80) is started, preliminary control is executed so as to supply a constant current to a second oxygen pump cell over a constant time, to thereby control to a constant level the amount of oxygen pumped from a second measurement chamber to the outside of the second measurement chamber (S40 to 50). The preliminary control is executed under control conditions of the sensor control apparatus which are determined for each gas sensor and are associated with the amount of oxygen pumped from the second measurement chamber to the outside thereof. The control conditions bring into a target range the concentration correspondence value calculated after start of the drive control which is started after the preliminary control is executed in a state in which a reference gas having a known concentration is introduced into the gas sensor.

摘要翻译： [目的]本发明的目的是提供一种传感器控制装置和传感器控制装置控制方法，其可以在多次执行检测处理之间减少启动时间的变化，考虑到多个 气体传感器。 [解决方案]在传感器控制装置中，在开始驱动控制（S55〜S80）之前，执行预备控制，以便在恒定时间内向第二氧泵单元提供恒定电流，从而控制为恒定 将从第二测量室泵送的氧气量调整到第二测量室外（S40至50）。 在对于每个气体传感器确定的传感器控制装置的控制条件下执行预备控制，并且与从第二测量室泵送到其外部的氧气量相关联。 控制条件使目标范围成为在将具有已知浓度的参考气体引入气体传感器的状态下进行预控制之后开始的驱动控制开始后计算出的浓度对应值。

公开(公告)号：US08513961B2

公开(公告)日：2013-08-20

申请号：US12688956

申请日：2010-01-18

申请人： Tomohisa Fujita ,  Takeshi Kawai ,  Satoshi Teramoto ,  Shigeki Mori

发明人： Tomohisa Fujita ,  Takeshi Kawai ,  Satoshi Teramoto ,  Shigeki Mori

IPC分类号： G01R27/08

CPC分类号： G01N27/4067 ,  G01N27/407

摘要： A defect detection method for a sensor in which a fixing member provides a seal between a sensor element and tubular metallic members, the method being capable of detecting breakage of a conductor caused by breakage of the element.

摘要翻译： 一种用于传感器的缺陷检测方法，其中定影构件在传感器元件和管状金属构件之间提供密封，该方法能够检测由元件断裂引起的导体断裂。

公开(公告)号：US20100225339A1

公开(公告)日：2010-09-09

申请号：US12688956

申请日：2010-01-18

申请人： Tomohisa Fujita ,  Takeshi Kawai ,  Satoshi Teramoto ,  Shigeki Mori

发明人： Tomohisa Fujita ,  Takeshi Kawai ,  Satoshi Teramoto ,  Shigeki Mori

IPC分类号： G01R27/08

CPC分类号： G01N27/4067 ,  G01N27/407

摘要： A defect detection method for a sensor in which a fixing member provides a seal between a sensor element and tubular metallic members, the method being capable of detecting breakage of a conductor caused by breakage of the element.

摘要翻译： 一种用于传感器的缺陷检测方法，其中定影构件在传感器元件和管状金属构件之间提供密封，该方法能够检测由元件断裂引起的导体断裂。

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：US09201040B2

公开(公告)日：2015-12-01

申请号：US13176106

申请日：2011-07-05

申请人： Yuichi Yamada ,  Takahiro Akiyama ,  Takuya Saito ,  Makoto Kume ,  Satoshi Teramoto ,  Noboru Matsui ,  Hiroshi Inagaki ,  Takeshi Kawai ,  Shinichiro Iwama

发明人： Yuichi Yamada ,  Takahiro Akiyama ,  Takuya Saito ,  Makoto Kume ,  Satoshi Teramoto ,  Noboru Matsui ,  Hiroshi Inagaki ,  Takeshi Kawai ,  Shinichiro Iwama

IPC分类号： G01M15/10 ,  G01N27/407

CPC分类号： G01N27/4078

摘要： A gas sensor including coating layers (64) and (69) of fluorine or a fluorine compound formed on the surface of a separator (60), including a front separator (61) and a rear separator (66), disposed inside a sheath (30). The coating layers (64) and (69) have water impermeability and water repellency. Even in the case where moisture contained in the atmosphere within a sheath (30) forms dew on the surface of the separator (60), the coating layers (64) and (69) prevent soaking of moisture into the separator (60), to thereby secure the insulation property of the separator (60). Also, the coating layers (64) and (69) having water repellency prevent a water droplet from spreading on the surface of the separator (60) with resultant formation of a film of water, to thereby prevent flow of leakage current via a film of water.

摘要翻译： 一种气体传感器，包括在隔膜（60）的表面上形成的氟或氟化合物的涂层（64）和（69），其包括前隔板（61）和后隔板（66） 30）。 涂层（64）和（69）具有防水性和防水性。 即使在护套（30）内的气氛中含有的水分在隔膜（60）的表面上形成露点的情况下，涂层（64）和（69）也防止水分进入隔板（60），使 从而确保隔板（60）的绝缘性。 此外，具有防水性的涂层（64）和（69）防止水滴在隔膜（60）的表面上扩散，从而形成水膜，从而防止泄漏电流通过膜 水。

公开(公告)号：US07084379B2

公开(公告)日：2006-08-01

申请号：US11082902

申请日：2005-03-18

申请人： Takuya Saito ,  Takeshi Kawai ,  Satoshi Teramoto

发明人： Takuya Saito ,  Takeshi Kawai ,  Satoshi Teramoto

IPC分类号： H05B1/02

CPC分类号： F02D41/1494 ,  G01N33/007

摘要： A control apparatus for a gas sensor, wherein a microcomputer 44, which is connected to an oxygen sensor 30 including a detection element 12 and a heater 14, detects the cooling water temperature Tw of the engine. The control apparatus determines that condensation water within the exhaust pipe is being generated when the cooling water temperature Tw is equal to or lower than 0° C. When equal to or lower than 0° C., the microcomputer 44 supplies to the heater 14 electrical power for maintaining the temperature of the detection element 12 within the range of 100° C. to a splash-water-cracking generation temperature (e.g., about 300° C.) at or above which cracking can occur in a laminated-type oxygen sensor element 10 due to splash of condensation water. Electrical power is supplied to the heater 14 such that a pulse signal Sh is output from the microcomputer 44, and the heater 14 is pulse-driven by use of a heater electrification control circuit 34.

摘要翻译： 一种用于气体传感器的控制装置，其中连接到包括检测元件12和加热器14的氧传感器30的微计算机44检测发动机的冷却水温度Tw。 当冷却水温度Tw等于或低于0℃时，控制装置确定排气管内的冷凝水正在产生。当等于或低于0℃时，微计算机44向加热器14供应电 用于将检测元件12的温度保持在100℃的范围内的功率达到或高于其中的飞溅水裂解发生温度（例如，约300℃），其中层压型氧传感器 元素10由于冷凝水溅出。 向加热器14提供电力，使得从微计算机44输出脉冲信号Sh，并且通过使用加热器通电控制电路34对加热器14进行脉冲驱动。

公开(公告)号：US06334946B1

公开(公告)日：2002-01-01

申请号：US09321568

申请日：1999-05-28

申请人： Tomohiro Mabuchi ,  Shigeki Mori ,  Satoshi Teramoto ,  Takeshi Kawai

发明人： Tomohiro Mabuchi ,  Shigeki Mori ,  Satoshi Teramoto ,  Takeshi Kawai

IPC分类号： G01N2741

CPC分类号： G01N27/407

摘要： A method of stabilizing pump current in a gas sensor through suppression of oscillations of the pump current which result from pulsations of measured gas is provided. The gas sensor includes an oxygen pump element, an oxygen concentration cell element and a measurement gap between the oxygen pump element and the oxygen concentration cell element, and is operative to control the pump current through the oxygen pump element so that an output voltage of the oxygen concentration cell element is constant in order that an oxygen concentration in the measurement gap is maintained constant and detect an oxygen concentration in the measured gas on the basis of the pump current. The method comprising adjusting an activity of electrodes of an oxygen pump element so as to change a responsiveness in control of the pump current and thereby reduce an amplitude of the oscillations of the pump current. There is also provided the above described type gas sensor wherein the activity of the electrodes of the oxygen pump element is adjusted so as to change a responsiveness in control of the pump current and thereby reduce the oscillations of the pump current.

摘要翻译： 提供了通过抑制由测量气体的脉动引起的泵浦电流的振荡来稳定气体传感器中的泵电流的方法。 气体传感器包括氧气泵元件，氧浓度电池元件和氧气泵元件和氧浓度电池元件之间的测量间隙，并且可操作以控制通过氧气泵元件的泵浦电流，使得输出电压 氧浓度电池元件是恒定的，以便测量间隙中的氧浓度保持恒定，并且基于泵电流检测测量气体中的氧浓度。 所述方法包括调节氧气泵元件的电极的活性，以便改变控制泵电流的响应性，从而减小泵电流振荡的幅度。 还提供了上述类型的气体传感器，其中氧气泵元件的电极的活性被调节以改变控制泵浦电流的响应性，从而减少泵电流的振荡。