公开(公告)号：EP0857966A3

公开(公告)日：2000-07-19

申请号：EP98102026.6

申请日：1998-02-05

申请人： NGK SPARK PLUG CO., LTD.

发明人： Tsuzuki, Masashi ,  Kawai, Takeshi

IPC分类号： G01N27/407

CPC分类号： G01N27/417

摘要： A gas sensor has a sensor cell unit which includes a detection member made up of an oxygen concentration cell, oxygen pump cell and a spacer interposed between the oxygen concentration cell and the oxygen pump cell to define therebetween a measurement gas chamber. The spacer has a pair of communicating holes for providing communication between the measurement gas chamber and the outside. Diffusion control layers made of porous material are formed within the communicating holes of the spacer so as to control flow of the detection gas into the measurement gas chamber, etc. The diffusion control layer is made of alumina and has on the outer surface thereof (i.e., on the inner peripheral surfaces thereof defining gas permeating pores) a thin Ca coating which inhibits formation of a substance which is in a liquid phase at a temperature range in which the gas sensor is used, due to reaction of the alumina forming the diffusion control layer with a suspended component of the detection gas such as phosphorus (P) in an engine exhaust gas.

摘要翻译： 气体传感器具有传感器单元单元，该传感器单元单元包括由氧气浓缩单元，氧气泵单元和介于氧气浓缩单元和氧气泵单元之间的间隔件构成的检测构件，以在其间限定测量气体室。 间隔件具有一对连通孔，用于提供测量气体室与外部之间的连通。 扩散控制层由间隔物的连通孔内形成，以控制检测气体进入测量气体室的流动等。扩散控制层由氧化铝制成并且在其外表面上具有（即 ，在其内周表面上限定气体渗透孔）中的薄Ca涂层，其由于形成扩散控制的氧化铝的反应而抑制在使用气体传感器的温度范围内形成处于液相的物质 在发动机废气中具有诸如磷（P）的检测气体的悬浮组分。

公开(公告)号：EP0828155A3

公开(公告)日：1999-10-06

申请号：EP97114940.6

申请日：1997-08-28

申请人： NGK Spark Plug Co. Ltd.

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

IPC分类号： G01N27/406

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 immediately 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.

公开(公告)号：EP0822326A3

公开(公告)日：1999-11-17

申请号：EP97113127.1

申请日：1997-07-30

申请人： NGK Spark Plug Co. Ltd.

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

IPC分类号： F02D41/14 ,  G01N27/406

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 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.

公开(公告)号：EP0857966A2

公开(公告)日：1998-08-12

申请号：EP98102026.6

申请日：1998-02-05

申请人： NGK SPARK PLUG CO., LTD.

发明人： Tsuzuki, Masashi ,  Kawai, Takeshi

IPC分类号： G01N27/407

CPC分类号： G01N27/417

摘要： A gas sensor has a sensor cell unit which includes a detection member made up of an oxygen concentration cell, oxygen pump cell and a spacer interposed between the oxygen concentration cell and the oxygen pump cell to define therebetween a measurement gas chamber. The spacer has a pair of communicating holes for providing communication between the measurement gas chamber and the outside. Diffusion control layers made of porous material are formed within the communicating holes of the spacer so as to control flow of the detection gas into the measurement gas chamber, etc. The diffusion control layer is made of alumina and has on the outer surface thereof (i.e., on the inner peripheral surfaces thereof defining gas permeating pores) a thin Ca coating which inhibits formation of a substance which is in a liquid phase at a temperature range in which the gas sensor is used, due to reaction of the alumina forming the diffusion control layer with a suspended component of the detection gas such as phosphorus (P) in an engine exhaust gas.

摘要翻译： 气体传感器具有传感器单元单元，其包括由氧浓度单元，氧气泵单元和插入在氧浓缩单元和氧气泵单元之间的间隔件构成的检测构件，以在其间限定测量气体室。 间隔件具有用于提供测量气体室与外部之间的连通的一对连通孔。 在间隔物的连通孔内形成由多孔材料构成的扩散控制层，以便控制检测气体流入测量气室等。扩散控制层由氧化铝制成，并在其外表面（即 在其内周表面上限定气体渗透孔）薄的Ca涂层，其抑制在使用气体传感器的温度范围内在液相中形成物质，由于形成扩散控制的氧化铝的反应 在发动机废气中具有诸如磷（P）的检测气体的悬浮组分的层。

公开(公告)号：EP0828155A2

公开(公告)日：1998-03-11

申请号：EP97114940.6

申请日：1997-08-28

申请人： NGK Spark Plug Co. Ltd.

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

IPC分类号： G01N27/406

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 immediately 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： 设置检测在宽范围空气燃料比传感器的激活状态的方法。 用这种方法，在发动机起动（S00）之后的电流到加热器的应用程序将立即开始。 然后，对于一个泵浦电流Icp经由到电动势小区（S10）通过。 的预定时刻Tin等待（S18）经过。 时刻Tin，Vs的跨越电极的电压被检测这两个电动势电池（S20），并标记为Vs0的（S22）时隔。 然后，电感的暂停应用程序（S30）和程序被保持在待机状态，直到25毫秒经过（S35）的时间。 在时间。当25毫秒的时间已经过去时的点，在电动势电池的相对侧电极间的电压进行检测（S40）和标记为VS1（S45）。 的电阻值Rs1的从Vs0的，VS1和ICP（S50）计算值。 电阻值Rs1的与之前已经准备了价值RSS（S55）进行比较，判断，当Rs1的比RSS是小，做的电动势电池已激活状态投入。 因此，用于检测一宽范围空气燃料比传感器的激活状态的装置。

公开(公告)号：EP0822326A2

公开(公告)日：1998-02-04

申请号：EP97113127.1

申请日：1997-07-30

申请人： NGK Spark Plug Co. Ltd.

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

IPC分类号： F02D41/14 ,  G01N27/406

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 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。 在开始施加电流之后，在预定时刻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，其不仅能够通过向电动势电池施加电流或电压来检测电动势电池的温度，而且可以检测泵电池的温度。

公开(公告)号：EP2141492B1

公开(公告)日：2018-09-26

申请号：EP09008774.3

申请日：2009-07-03

申请人： NGK Spark Plug Co., Ltd.

发明人： Kawai, Takeshi ,  Mori, Kentaro ,  Aoki, Ryohei

IPC分类号： G01N27/407

CPC分类号： G01N27/4071

摘要： A gas sensor including: a gas sensing element (200) including first and second ceramic layers (241, 221). The first ceramic layer has a first through hole (241h1) and a first through hole conductor (271) covering an inner surface thereof. The first ceramic layer includes a first conductor (247) which includes: a first peripheral conductive portion (247c) electrically connected to the first through hole conductor (271); a first lead portion (247b) that is narrower than the first peripheral conductive portion (247c); and a first contact conductive portion (247a) that is wider than the first lead portion (247b). The first peripheral conductive portion (247c), the first lead portion (247b) and the first contact conductive portion (247a) are integrally formed and arranged in this order in a longitudinal direction. The second ceramic layer (221) includes a second conductor (222) electrically connected to at least the first contact conductive portion (247a).

公开(公告)号：EP2490018A2

公开(公告)日：2012-08-22

申请号：EP12155963.7

申请日：2012-02-17

申请人： NGK Spark Plug Co., Ltd.

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

IPC分类号： G01N33/00

CPC分类号： G01N27/419

摘要： An apparatus and method for individually detecting NO and NO 2 concentrations as NO X 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 NO 2 /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 NO 2 /NO sensitivity ratios of the two detection elements, whereby an NO 2 concentration corresponding value is obtained. A value obtained by multiplying the NO 2 concentration corresponding value by the NO 2 /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.

摘要翻译： 用于将NO和NO 2浓度分别检测为目标气体的NO X成分的装置和方法。 从不具有还原部的第一检测元件获得NO浓度对应值。 从具有还原部分的第二检测元件获得NO浓度对应值，并且具有大于第一检测元件的NO 2 / NO灵敏度比的NO 2 / NO灵敏度比。 获得两个检测元件的NO浓度对应值之间的差“C”，除以两个检测元件的NO 2 / NO灵敏度比之间的差“S”，得到NO 2浓度对应值。 通过将NO 2浓度对应值乘以第二检测元件的NO 2 / NO灵敏度比而获得的值从第二检测元件的NO浓度对应值中减去，从而获得NO浓度对应值。

公开(公告)号：EP2141492A3

公开(公告)日：2012-05-23

申请号：EP09008774.3

申请日：2009-07-03

申请人： NGK Spark Plug Co., Ltd.

发明人： Kawai, Takeshi ,  Mori, Kentaro ,  Aoki, Ryohei

IPC分类号： G01N27/407

CPC分类号： G01N27/4071

摘要： A gas sensor including: a gas sensing element (200) including first and second ceramic layers (241, 221). The first ceramic layer has a first through hole (241h1) and a first through hole conductor (271) covering an inner surface thereof. The first ceramic layer includes a first conductor (247) which includes: a first peripheral conductive portion (247c) electrically connected to the first through hole conductor (271); a first lead portion (247b) that is narrower than the first peripheral conductive portion (247c); and a first contact conductive portion (247a) that is wider than the first lead portion (247b). The first peripheral conductive portion (247c), the first lead portion (247b) and the first contact conductive portion (247a) are integrally formed and arranged in this order in a longitudinal direction. The second ceramic layer (221) includes a second conductor (222) electrically connected to at least the first contact conductive portion (247a).

公开(公告)号：EP0841478A3

公开(公告)日：1999-10-06

申请号：EP97119445.1

申请日：1997-11-06

申请人： NGK Spark Plug Co. Ltd.

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

IPC分类号： F02D41/22 ,  F02D41/14

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 µs 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.