公开(公告)号：US10082480B2

公开(公告)日：2018-09-25

申请号：US15597826

申请日：2017-05-17

Applicant: NGK SPARK PLUG CO., LTD.

Inventor： Satoru Abe ,  Tomonori Uemura ,  Tetsuya Ito ,  Satoshi Teramoto

IPC: G01N27/409 ,  G01N27/407 ,  G01N33/00

CPC classification number: G01N27/409 ,  F02D41/1446 ,  F02D41/1456 ,  G01N27/4073 ,  G01N33/0036

Abstract: A gas concentration detection device for detecting a gas concentration using a limiting current type gas concentration sensor. In an application voltage line set to pass through a plurality of limiting current regions for different values of gas concentration, a ratio for lean is set as a ratio of change in current with respect to a change in voltage when an air/fuel ratio corresponding to the gas concentration is lean, and a ratio of rich different from the ratio for lean is set when the air/fuel ratio is rich.

公开(公告)号：US09080964B2

公开(公告)日：2015-07-14

申请号：US13665731

申请日：2012-10-31

Applicant: NGK SPARK PLUG CO., LTD.

Inventor： Sigehiro Otsuka ,  Masaki Onkawa ,  Toru Iwano ,  Satoshi Teramoto ,  Kuniharu Tanaka ,  Takeshi Mitsuoka

IPC: G01N27/407 ,  G01N33/00

CPC classification number: G01N27/4077 ,  G01N33/0014 ,  G01N33/0037 ,  Y02A50/245

Abstract: A gas sensor element (100) includes a laminate of a detection element (300) and a heater (200), and a porous protection layer (20) covering a forward end portion thereof. The laminate has a measuring chamber (107c) into which a gas-to-be-measured is introduced via a diffusion resistor (115). The porous protection layer includes an inner porous layer (21), and an outer porous layer (23). The inner porous layer has a higher porosity than the outer porous layer and the diffusion resistor. As viewed in a plurality of 100 μm×100 μm regions a1 to a3 and b1 to b3 on sections of the inner porous layer and the diffusion resistor, respectively, a pore diameter greater than the greatest pore diameter CDIF in the regions of the diffusion resistor exists in each of the regions of the inner porous layer.

Abstract translation: 气体传感器元件（100）包括检测元件（300）和加热器（200）的层叠体，以及覆盖其前端部的多孔保护层（20）。 层压体具有经由扩散电阻器（115）引入待测气体的测量室（107c）。 多孔保护层包括内多孔层（21）和外多孔层（23）。 内部多孔层具有比外部多孔层和扩散电阻器更高的孔隙率。 从内部多孔层和扩散电阻的各部分的多个100μm×100μm的区域a1〜a3，b1〜b3分别观察到，扩散电阻区域的孔径大于最大孔径CDIF 存在于内部多孔层的每个区域中。

公开(公告)号：US10509009B2

公开(公告)日：2019-12-17

申请号：US15062596

申请日：2016-03-07

Applicant: NGK SPARK PLUG CO., LTD.

Inventor： Dai Nishijima ,  Satoshi Teramoto

IPC: G01N27/419 ,  G01N33/00

Abstract: A sensor control apparatus for a gas sensor which detects a particular gas component contained in a gas under measurement. In the case where humidity detection is performed using an electromotive-force-type gas sensor, a sensor control apparatus changes a target voltage of an electromotive force cell to a second target voltage for humidity detection and then to a third target voltage which is lower than a first target voltage which is a target voltage used for detecting the concentration of the particular gas component. In the case where humidity detection is performed using a limiting-current-type gas sensor, the sensor control apparatus changes the voltage applied to a pump cell to a second application voltage for humidity detection and then to a third application voltage which is lower than a first application voltage which is an application voltage used for detecting the concentration of the particular gas component.

公开(公告)号：US20180321183A1

公开(公告)日：2018-11-08

申请号：US16033106

申请日：2018-07-11

Applicant: NGK SPARK PLUG CO., LTD.

Inventor： Dai NISHIJIMA ,  Satoshi Teramoto

IPC: G01N27/419

CPC classification number: G01N27/419 ,  G01N33/006

Abstract: A sensor control apparatus for a gas sensor which detects a particular gas component contained in a gas under measurement. In the case where humidity detection is performed using an electromotive-force-type gas sensor, a sensor control apparatus changes a target voltage of an electromotive force cell to a second target voltage for humidity detection and then to a third target voltage which is lower than a first target voltage which is a target voltage used for detecting the concentration of the particular gas component. In the case where humidity detection is performed using a limiting-current-type gas sensor, the sensor control apparatus changes the voltage applied to a pump cell to a second application voltage for humidity detection and then to a third application voltage which is lower than a first application voltage which is an application voltage used for detecting the concentration of the particular gas component.

公开(公告)号：US20140291150A1

公开(公告)日：2014-10-02

申请号：US14355457

申请日：2012-11-20

Applicant: NGK SPARK PLUG CO. LTD.

Inventor： Shigehiro Otsuka ,  Masaki Onkawa ,  Toru Iwano ,  Satoshi Teramoto ,  Kuniharu Tanaka ,  Takeshi Mitsuoka

IPC: G01N27/407

CPC classification number: G01N27/4077 ,  G01N27/4118

Abstract: A gas sensor element (100) including a detection portion (150) including a solid electrolyte body (105) and a pair of electrodes (104) and (106) disposed on the solid electrolyte body; and a porous protection layer (20) covering the detection portion. The porous protection layer includes an inner porous layer (21) and an outer porous layer (23); the inner porous layer is higher in porosity than the outer porous layer; the inner porous layer contains, as main components, ceramic particles (21a), and ceramic fiber filaments (21b) which are mainly formed of a ceramic material and which have a mean fiber length of 70 to 200 μm; and the amount of the ceramic fiber filaments is 25 to 75 vol % on the basis of the total amount of the ceramic particles and the ceramic fiber filaments, the total amount being taken as 100 vol %.

Abstract translation: 一种气体传感器元件（100），包括：检测部（150），其包括固体电解质体（105）和设置在所述固体电解质体上的一对电极（104）和（106） 以及覆盖所述检测部的多孔保护层（20）。 多孔保护层包括内部多孔层（21）和外部多孔层（23）; 内多孔层的孔隙率高于外多孔层; 内部多孔层含有主要由陶瓷材料形成且平均纤维长度为70〜200μm的陶瓷粒子（21a）和陶瓷纤维丝（21b）， 以陶瓷粒子和陶瓷纤维丝的总量计，陶瓷纤维长丝的量为25〜75体积％，总量为100体积％。

公开(公告)号：US09310331B2

公开(公告)日：2016-04-12

申请号：US14080444

申请日：2013-11-14

Applicant: NGK SPARK PLUG CO., LTD.

Inventor： Hirotaka Onogi ,  Yuichi Ishida ,  Satoshi Teramoto

IPC: G01N27/407 ,  G01N33/00

CPC classification number: G01N27/407 ,  G01N27/419 ,  G01N33/0037

Abstract: An NOx detection apparatus does not always perform correction processing, but it determines whether to perform the correction processing on the basis of the result of a determination of whether a first Nox concentration is higher than a predetermined specific concentration. The first NOx concentration NOxpo calculated from a second pumping current Ip2 which changes with the actual NOx concentration. Therefore, the NOx detection apparatus can determine whether to correct the first NOx concentration NOxpo in accordance with the actual NOx concentration. Accordingly, the NOx detection apparatus can suppress a decrease in gas detection accuracy even in the case where the gas detection value based on the sensor output involves an error in a specific concentration range (concentration range of 90 ppm or higher).

Abstract translation: NOx检测装置不总是执行校正处理，而是基于第一Nox浓度是否高于预定的特定浓度的结果来确定是否执行校正处理。 从实际NOx浓度变化的第二泵浦电流Ip2计算出的第一NOx浓度NOxpo。 因此，NOx检测装置可以根据实际的NOx浓度来确定是否校正第一NOx浓度NOxpo。 因此，即使在基于传感器输出的气体检测值涉及特定浓度范围（浓度范围为90ppm以上）的情况下，NOx检测装置也能够抑制气体检测精度的降低。

公开(公告)号：US09291525B2

公开(公告)日：2016-03-22

申请号：US13907230

申请日：2013-05-31

Applicant: NGK SPARK PLUG CO., LTD.

Inventor： Shigehiro Otsuka ,  Masaki Onkawa ,  Toru Iwano ,  Satoshi Teramoto ,  Kuniharu Tanaka ,  Takeshi Mitsuoka

IPC: G01N27/407 ,  G01M15/10

CPC classification number: G01M15/102 ,  G01N27/4077

Abstract: A gas sensor element and a gas sensor incorporating the gas sensor element. The gas sensor element (100) includes a detection portion (150) including a solid electrolyte body (105) and a pair of electrodes (104) and (106) disposed on the solid electrolyte body; and a porous protection layer (20) covering the detection portion. The porous protection layer includes an inner porous layer (21) and an outer porous layer (23). The inner porous layer has a higher porosity than the outer porous layer. Further, the inner porous layer contains, as main components, ceramic particles (21a), and ceramic fiber filaments (21b), and the amount of the ceramic fiber filaments is 25 to 75 vol % based on the total amount of the ceramic particles and the ceramic fiber filaments taken as 100 vol %.

Abstract translation: 气体传感器元件和结合有气体传感器元件的气体传感器。 气体传感器元件（100）包括：固体电解质体（105）和配置在固体电解质体上的一对电极（104）和（106）的检测部（150） 以及覆盖所述检测部的多孔保护层（20）。 多孔保护层包括内部多孔层（21）和外部多孔层（23）。 内部多孔层的孔隙率高于外层多孔层。 此外，内部多孔层含有陶瓷粒子（21a）和陶瓷纤维丝（21b）作为主要成分，陶瓷纤维丝的量相对于陶瓷粒子的总量为25〜75体积％， 陶瓷纤维长丝为100体积％。

公开(公告)号：US09631999B2

公开(公告)日：2017-04-25

申请号：US14080494

申请日：2013-11-14

Applicant: NGK SPARK PLUG CO., LTD.

Inventor： Hirotaka Onogi ,  Kenji Kato ,  Satoshi Teramoto

IPC: G01L27/00 ,  G01N27/417

CPC classification number: G01L27/005 ,  G01N27/4175

Abstract: An NOx detection apparatus computes a first NOx concentration NOxpo on the basis of a second pumping current Ip2, and sets correction coefficients a, b (concentration variation correction information) on the basis of the first NOx concentration NOxpo. Therefore, the NOx detection apparatus can set the correction coefficients a, b in accordance with the concentration of NOx actually contained in a to-be-measured gas. Since the NOx detection apparatus uses Equation 3, determined by the correction coefficients a, b, for correction of the first NOx concentration NOxpo, the NOx detection apparatus can correct the first NOx concentration NOxpo in accordance with the state of change of the NOx concentration even when the magnitude of an output variation caused by a pressure change changes depending on the NOx concentration.

公开(公告)号：US09234870B2

公开(公告)日：2016-01-12

申请号：US14355457

申请日：2012-11-20

Applicant: NGK SPARK PLUG CO. LTD.

Inventor： Shigehiro Otsuka ,  Masaki Onkawa ,  Toru Iwano ,  Satoshi Teramoto ,  Kuniharu Tanaka ,  Takeshi Mitsuoka

IPC: G01N27/407 ,  G01N27/411

CPC classification number: G01N27/4077 ,  G01N27/4118

Abstract: A gas sensor element (100) including a detection portion (150) including a solid electrolyte body (105) and a pair of electrodes (104) and (106) disposed on the solid electrolyte body; and a porous protection layer (20) covering the detection portion. The porous protection layer includes an inner porous layer (21) and an outer porous layer (23); the inner porous layer is higher in porosity than the outer porous layer; the inner porous layer contains, as main components, ceramic particles (21a), and ceramic fiber filaments (21b) which are mainly formed of a ceramic material and which have a mean fiber length of 70 to 200 μm; and the amount of the ceramic fiber filaments is 25 to 75 vol % on the basis of the total amount of the ceramic particles and the ceramic fiber filaments, the total amount being taken as 100 vol %.

Abstract translation: 一种气体传感器元件（100），包括：检测部（150），其包括固体电解质体（105）和设置在所述固体电解质体上的一对电极（104）和（106） 以及覆盖所述检测部的多孔保护层（20）。 多孔保护层包括内部多孔层（21）和外部多孔层（23）; 内多孔层的孔隙率高于外多孔层; 内部多孔层含有主要由陶瓷材料形成且平均纤维长度为70〜200μm的陶瓷粒子（21a）和陶瓷纤维丝（21b）， 以陶瓷粒子和陶瓷纤维丝的总量计，陶瓷纤维长丝的量为25〜75体积％，总量为100体积％。