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1. 发明授权

US06334946B1 Method of stabilizing pump current in gas sensor 有权
标题翻译：稳定气体传感器泵浦电流的方法
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。

2. 发明授权

US07964073B2 Air fuel ratio detection apparatus 有权
标题翻译：空燃比检测装置
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。

3. 发明申请

US20070119437A1 Air fuel ratio detection apparatus 有权
标题翻译：空燃比检测装置
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。

4. 发明授权

US5976350A Method of and apparatus for detecting an activated condition of a wide range air-fuel ratio sensor 失效
标题翻译：用于检测大范围空燃比传感器的激活状态的方法和装置
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。

5. 发明授权

US08513961B2 Detection method for defect of sensor 有权
标题翻译：传感器缺陷检测方法
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。

6. 发明申请

US20100225339A1 DETECTION METHOD FOR DEFECT OF SENSOR 有权
标题翻译：传感器缺陷检测方法
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。

7. 发明授权

US6099717A Method of and apparatus for detecting a deteriorated condition of a wide range air-fuel ratio sensor 失效
标题翻译：用于检测大范围空燃比传感器劣化状况的方法和装置
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。

8. 发明授权

US6120677A Temperature control for all range oxygen sensor 失效
标题翻译：所有范围氧传感器的温度控制
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。

9. 发明授权

US09823220B2 NOx concentration detection apparatus and NOx concentration detection method 有权
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.

10. 发明授权

US08877024B2 Sensor control device and sensor control method 有权
标题翻译：传感器控制装置和传感器控制方法
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。

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