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：US07573275B2

公开(公告)日：2009-08-11

申请号：US11509566

申请日：2006-08-25

申请人： Hiroshi Inagaki ,  Yuji Oi

发明人： Hiroshi Inagaki ,  Yuji Oi

IPC分类号： G01R27/08

CPC分类号： G01K7/24 ,  G01K2205/04

摘要： A temperature sensor control apparatus includes a reference potential section, a driving potential section set to a driving electric potential, a temperature sensor configured to vary a resistance in accordance with a temperature, and disposed between the reference potential section and the driving potential section, a conduction path, two reference resistance elements each connected in series with the temperature sensor, a potential controlled point disposed in the conduction path between the reference resistance elements, a potential setting section configured to set an electric potential of the potential controlled point to the driving electric potential; and a resistance switching control section configured to control the potential setting section to switch the electric potential of the potential controlled point, and to switch each of the reference resistance elements to one of an energized state and a deenergized state.

摘要翻译： 温度传感器控制装置包括参考电位部分，设置为驱动电位的驱动电位部分，配置为根据温度改变电阻并设置在参考电位部分和驱动电位部分之间的温度传感器， 导通路径，与温度传感器串联连接的两个参考电阻元件，设置在参考电阻元件之间的导通路径中的电位受控点，被配置为将电势受控点的电势设定为驱动电 潜在; 以及电阻切换控制部，被配置为控制所述电位设定部切换所述电位受控点的电位，并将所述基准电阻元件切换为通电状态和断电状态。

公开(公告)号：US07416649B2

公开(公告)日：2008-08-26

申请号：US10802716

申请日：2004-03-18

申请人： Norikazu Ieda ,  Yuji Oi

发明人： Norikazu Ieda ,  Yuji Oi

IPC分类号： G01N27/41

CPC分类号： G01N27/4175 ,  F02D41/1495

摘要： An oxygen concentration detection system including an oxygen sensor which outputs a plurality of types of measurement signals and anomaly detection means and modification means. The anomaly detection means detects a sensor anomaly by determining whether the respective levels of the plurality of types of measurement signals fall within predetermined ranges. When a sensor anomaly is not detected, the modification means outputs the plurality of types of measurement signals as is. When a sensor anomaly is detected, the modification means outputs at least one of the plurality of types of measurement signals at a level outside the corresponding range within which the level of the measurement signal varies in a normal state.

摘要翻译： 一种氧浓度检测系统，包括输出多种测量信号的氧传感器和异常检测装置和修改装置。 异常检测装置通过确定多个类型的测量信号的各个电平是否落在预定范围内来检测传感器异常。 当未检测到传感器异常时，修改装置原样输出多种类型的测量信号。 当检测到传感器异常时，修正装置在正常状态下测量信号的电平变化的对应范围之外的电平输出多种类型的测量信号中的至少一种。

公开(公告)号：US20070046419A1

公开(公告)日：2007-03-01

申请号：US11509566

申请日：2006-08-25

申请人： Hiroshi Inagaki ,  Yuji Oi

发明人： Hiroshi Inagaki ,  Yuji Oi

IPC分类号： H01C7/00 ,  H05B3/02

CPC分类号： G01K7/24 ,  G01K2205/04

摘要： A temperature sensor control apparatus includes a reference potential section, a driving potential section set to a driving electric potential, a temperature sensor configured to vary a resistance in accordance with a temperature, and disposed between the reference potential section and the driving potential section, a conduction path, two reference resistance elements each connected in series with the temperature sensor, a potential controlled point disposed in the conduction path between the reference resistance elements, a potential setting section configured to set an electric potential of the potential controlled point to the driving electric potential; and a resistance switching control section configured to control the potential setting section to switch the electric potential of the potential controlled point, and to switch each of the reference resistance elements to one of an energized state and a deenergized state.

摘要翻译： 温度传感器控制装置包括参考电位部分，设置为驱动电位的驱动电位部分，配置为根据温度改变电阻并设置在参考电位部分和驱动电位部分之间的温度传感器， 导通路径，与温度传感器串联连接的两个参考电阻元件，设置在参考电阻元件之间的导通路径中的电位受控点，被配置为将电势受控点的电势设定为驱动电 潜在; 以及电阻切换控制部，被配置为控制所述电位设定部切换所述电位受控点的电位，并将所述基准电阻元件切换为通电状态和断电状态。