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公开(公告)号：US20170336342A1
公开(公告)日：2017-11-23
申请号：US15597826
申请日：2017-05-17
发明人： Satoru ABE , Tomonori UEMURA , Tetsuya ITO , Satoshi TERAMOTO
IPC分类号： G01N27/409 , G01N33/00 , G01N27/407
CPC分类号： G01N27/409 , F02D41/1446 , F02D41/1456 , G01N27/4073 , G01N33/0036
摘要： 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.
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公开(公告)号：US20140131200A1
公开(公告)日：2014-05-15
申请号：US14080444
申请日：2013-11-14
发明人： Hirotaka ONOGI , Yuichi ISHIDA , Satoshi TERAMOTO
IPC分类号： G01N27/48
CPC分类号： G01N27/407 , G01N27/419 , G01N33/0037
摘要： 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).
摘要翻译： 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。
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公开(公告)号：US20140136136A1
公开(公告)日：2014-05-15
申请号：US14080494
申请日：2013-11-14
发明人： Hirotaka ONOGI , Kenji KATO , Satoshi TERAMOTO
CPC分类号： G01L27/005 , G01N27/4175
摘要： 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.
摘要翻译： NOx检测装置基于第二泵浦电流Ip2计算第一NOx浓度NOxpo，并且基于第一NOx浓度NOxpo设定校正系数a，b（浓度变化校正信息）。 因此，NOx检测装置可以根据被测量气体中实际含有的NOx的浓度来设定校正系数a，b。 由于NOx检测装置使用由用于校正第一NOx浓度NOxpo的校正系数a，b确定的等式3，所以NOx检测装置可以根据NOx浓度的变化的状态来校正第一NOx浓度NOxpo 当由压力变化引起的输出变化的大小根据NOx浓度而变化时。
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公开(公告)号：US20180299404A1
公开(公告)日：2018-10-18
申请号：US15953051
申请日：2018-04-13
IPC分类号： G01N27/416 , G01N27/406 , G01N27/407 , G01N27/41 , G01N27/12
摘要： A sensor control apparatus (1) calculates the concentration of oxygen using a gas sensor (3) including a sensor element (11) and a heater (12). The sensor control apparatus (1) repeatedly obtains internal resistance data representing an internal resistance value Rpvs of an oxygen-ion-conductive solid electrolyte body (14) and pump current data representing the value of pump current Ip which flows between a pair of pump electrodes (15) and (16) and whose value varies with the concentration of oxygen. The sensor control apparatus (1) corrects the value of the pump current Ip based on the internal resistance value Rpvs, a target internal resistance value, and a derivative value dRpvs/dt calculated based on a plurality of the repeatedly obtained internal resistance values Rpvs.
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公开(公告)号：US20170336344A1
公开(公告)日：2017-11-23
申请号：US15598800
申请日：2017-05-18
发明人： Tomonori UEMURA , Satoru ABE , Tetsuya ITO , Satoshi TERAMOTO
IPC分类号： G01N27/41 , G01N27/407 , G01N33/22
CPC分类号： G01N27/41 , G01N27/4071 , G01N27/4073 , G01N27/4075 , G01N33/225
摘要： 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, the voltage set by the application voltage line is an identical first voltage value used when an air/fuel ratio corresponding to the gas concentration is in a predetermined first range, is an identical second voltage value different from the first voltage value used when the air/fuel ratio is in a second range adjacent to the first range, and the first voltage value and the second voltage value are switched between the first range and the second range.
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公开(公告)号：US20190107505A1
公开(公告)日：2019-04-11
申请号：US16132558
申请日：2018-09-17
发明人： Takanori NUNOME , Tomomi IMAIDA , Satoshi TERAMOTO
IPC分类号： G01N27/407 , G01N27/406 , G01N27/419
摘要： Disclosed is a sensor control device for controlling a gas sensor of the type having a sensor element, in which a pair of electrodes are arranged on a solid electrolyte body to cause a concentration detection current between the electrodes, and a heater. The sensor control device includes a temperature detection portion for detecting a temperature value of the solid electrolyte body and a control portion for performing feedback control on a heat generation amount of the heater based on a predetermined feedback condition. The feedback condition is set such that, when an evaluation gas simulating an engine exhaust gas discharged by combustion of a stoichiometric air-fuel ratio mixture is supplied as the gas under measurement at 25° C. while switching a gas flow rate of the evaluation gas between 10 m/s and 60 m/s every 10 seconds, a variation width of the concentration detection current is 1.6 μA or smaller.
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公开(公告)号：US20140130572A1
公开(公告)日：2014-05-15
申请号：US13907230
申请日：2013-05-31
发明人： Shigehiro OTSUKA , Masaki ONKAWA , Toru IWANO , Satoshi TERAMOTO , Kuniharu TANAKA , Takeshi MITSUOKA
IPC分类号： G01M15/10
CPC分类号： G01M15/102 , G01N27/4077
摘要： 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 %.
摘要翻译： 气体传感器元件和包含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％。
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公开(公告)号：US20160266062A1
公开(公告)日：2016-09-15
申请号：US15062596
申请日：2016-03-07
发明人： Dai NISHIJIMA , Satoshi TERAMOTO
IPC分类号： G01N27/41 , G01N27/419 , G01N27/406 , G01N27/407
摘要： 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.
摘要翻译： 一种用于气体传感器的传感器控制装置，其检测包含在被测气体中的特定气体成分。 在使用电动势型气体传感器进行湿度检测的情况下，传感器控制装置将电动势单元的目标电压变更为第二目标电压，进行湿度检测，然后将其变为低于 第一目标电压，其是用于检测特定气体成分的浓度的目标电压。 在使用极限电流型气体传感器进行湿度检测的情况下，传感器控制装置将施加于泵电池的电压变更为第二施加电压进行湿度检测，然后变为低于 第一施加电压，其是用于检测特定气体成分的浓度的施加电压。
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公开(公告)号：US20130104625A1
公开(公告)日：2013-05-02
申请号：US13665731
申请日：2012-10-31
发明人： Sigehiro OTSUKA , Masaki ONKAWA , Toru IWANO , Satoshi TERAMOTO , Kuniharu TANAKA , Ken MITSUOKA , Takeshi Mitsuoka
IPC分类号： G01N33/00
CPC分类号： G01N27/4077 , G01N33/0014 , G01N33/0037 , Y02A50/245
摘要： 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.
摘要翻译： 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100mum×100mum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。
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