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公开(公告)号：US20180313739A1
公开(公告)日：2018-11-01
申请号：US15769797
申请日：2016-10-20
申请人： DENSO CORPORATION
发明人： Go MIYAGAWA , Masayuki TAMURA , Masahiro YAMAMOTO , Takashi ARAKI , Toshihiro SAKAWA , Masato KATSUNO , Manabu YOSHIDOME
摘要： An apparatus which detects particulate matter is provided. This apparatus estimates a volume of water inside an exhaust passage using estimation sections. When an estimated volume of water is larger than a water drainage threshold, an element portion is heated using a heater by the first temperature range controller, in a temperature range which resists water-induced cracking independent of a volume of water droplets. If the estimated volume of water is less than a water drainage threshold, the water drainage determination section determines that the water drainage of the exhaust passage is completed. Additionally, if it is estimated that the water drainage is completed, the element portion is heated by a second temperature controller at temperature lower than a starting temperature of combustion of particulate matter and in order to repel water adhered onto the element portion in a water-repellent temperature range for a predetermined period.
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公开(公告)号：US20170350300A1
公开(公告)日：2017-12-07
申请号：US15538796
申请日：2015-12-21
申请人： DENSO CORPORATION
CPC分类号： F01N11/007 , F01N3/00 , F01N3/023 , F01N13/008 , F01N2560/05 , F01N2560/12 , G01M15/102 , G01N15/0656 , G01N27/04
摘要： A particulate matter sensor detecting particulate matter in exhaust emissions is provided, which is resistant to having sensor surfaces buried by particulate matter residue. Detection electrodes are provided, with alternating polarity, laminated in a laminating direction, separated by insulation. Of the detection electrodes, first detection electrodes of one polarity and second detection electrodes of the other polarity are exposed perpendicular to the laminating direction. In the direction perpendicular to the laminating direction, the particulate matter sensor has target accumulating parts on which the particulate matter is accumulated. In the target accumulating parts, the thickness W1 of the first detection electrodes in the laminating direction is greater than the thickness W2 of the second detection electrodes in the laminating direction.
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公开(公告)号：US20180195933A1
公开(公告)日：2018-07-12
申请号：US15740507
申请日：2016-06-08
申请人： DENSO CORPORATION
发明人： Go MIYAGAWA , Kouji ANDOH , Masayuki TAMURA , Hirokatsu IMAGAWA , Takao MISHIMA , Hideki YAMADA , Masahiro YAMAMOTO
CPC分类号： G01M15/102 , F01N11/002 , G01M15/10 , G01N15/0606 , G01N15/0656 , G01N27/04 , G01N2015/0046
摘要： A particulate matter sensor and a particulate matter sensing system using such a sensor are provided which are capable of being produced at decreased cost and accurately measuring the temperature of a heater. The particulate matter sensor includes a deposition portion on which particulate matter contained in exhaust gas is accumulated, a pair of electrodes which are disposed on the deposition portion and separate from each other, a heater which heats the deposition portion, and a pair of heater leads which form a path through which electrical current is delivered to the heater. A sensing line is connected to at least one of the heater leads to measure a resistance of the heater lead.
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公开(公告)号：US20170322134A1
公开(公告)日：2017-11-09
申请号：US15524738
申请日：2015-09-08
申请人： DENSO CORPORATION
CPC分类号： G01N15/06 , G01B7/34 , G01M15/102 , G01N15/0606 , G01N15/0656 , G01N27/04 , G01N2015/0046
摘要： A particulate matter detection element 1 includes paired detection electrodes 12 for detecting particulate matter contained in exhaust gas discharged from an internal combustion engine, and insulating member 13 made of electrically insulating material. In the particulate matter detection element 1, at least part of the paired detection electrodes 12 is exposed from the insulating member 13 in the direction perpendicular to the lamination direction of the paired detection electrodes 1, to cause part of the particulate matter to deposit thereon. The surface roughness of at least the insulating member disposed between the paired detection electrodes is between 0.8 μm and 8.0 μm in 10-point average roughness.
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公开(公告)号：US20170131185A1
公开(公告)日：2017-05-11
申请号：US15319185
申请日：2015-06-02
申请人： DENSO CORPORATION
CPC分类号： G01N1/2252 , G01N15/0606 , G01N15/0656 , G01N27/04 , G01N2001/2223 , G01N2015/0046
摘要： A particulate matter detection sensor includes a particulate matter detection unit for changing the output of an electrical signal in accordance with change in the electrical characteristics due to the deposition of particulate matter contained in an exhaust gas G discharged from an internal combustion engine, and a cover member having a cylindrical cover wall and disposed to surround the particulate matter detection unit. The particulate matter detection unit includes a deposition portion on which a part of the particulate matter is deposited, and a plurality of detection electrodes disposed being spaced apart from each other on the deposition portion. The deposition portion of the particulate matter detection unit is arranged so as to be oriented towards the tip side of the cover member. The cover wall of the cover member includes a plurality of exhaust gas introduction holes formed at positions closer to the tip side than is the deposition portion.
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公开(公告)号：US20160018357A1
公开(公告)日：2016-01-21
申请号：US14793211
申请日：2015-07-07
发明人： Hiroki NISHIJIMA , Yoshiharu MIYAKE , Haruki KONDO , Makoto NAKAE , Tooru TAKEUCHI , Masayuki TAMURA , Atsushi MURAI
IPC分类号： G01N27/406 , G01N27/409 , G01N27/407
CPC分类号： G01N27/4067 , G01N27/4071 , G01N27/4077 , G01N27/409
摘要： A gas sensor element having a porous protective layer with excellent water repellency. Provided is a gas sensor element having a detection portion, which has a stack of a solid electrolyte body having a pair of electrodes on opposite sides thereof and a heat generating body including a heat generating source, and a porous protective layer formed around the detection portion. The porous protective layer has thermal conductivity λ in the range of 0.2 to 5 W/mK, and has λCpp, which is the product of the thermal conductivity λ(W/mK), density ρ(g/m3), and specific heat Cp(J/gK), in the range of 5.3×105 to 2.1×107 WJ/m4K2.
摘要翻译： 具有防水性优异的多孔保护层的气体传感器元件。 本发明提供一种具有检测部分的气体传感器元件，该检测部分具有在其相对侧上具有一对电极的固体电解质体的堆叠和包括发热源的发热体，以及形成在检测部分周围的多孔保护层 。 多孔保护层的热导率λ在0.2〜5W / mK的范围内，λCpp为导热系数λ（W / mK），密度（g / m3），比热 Cp（J / gK）在5.3×105〜2.1×107WJ / m4K2的范围内。
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公开(公告)号：US20180306087A1
公开(公告)日：2018-10-25
申请号：US15769801
申请日：2016-10-21
申请人： DENSO CORPORATION
发明人： Takashi ARAKI , Masayuki TAMURA , Masahiro YAMAMOTO , Go MIYAGAWA , Toshihiro SAKAWA , Masato KATSUNO , Manabu YOSHIDOME
CPC分类号： F01N11/00 , F01N3/00 , F01N3/023 , F01N3/18 , F01N9/002 , F01N2550/04 , F01N2900/14 , F01N2900/1602 , F01N2900/1606
摘要： A particulate matter detection apparatus is provided with an element portion onto which PM contained in exhaust gas of an engine adheres thereto. A heater which heats the element portion, a quantity detecting portion which detects a quantity of the PM based on electrical properties of the element portion and a temperature detecting portion which detects a temperature of the element portion. The apparatus is further provided with a first and second temperature controller. The first temperature controller heats the element portion using a heater in a first period, which excludes a period in which PM adheres to the element portion based on a detected temperature of the element portion. The element portion is heated in a first temperature range to combust soluble organic fractions contained in the PM and resist melting of ash components contained in the PM. The first period excludes a period in which PM adheres to the element portion. The second temperature controller heats the element portion in the second temperature range, which is higher than the first temperature range using the heater, such that ash is combusted, based on a detected temperature of the element portion.
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公开(公告)号：US20180266936A1
公开(公告)日：2018-09-20
申请号：US15759947
申请日：2016-09-14
申请人： DENSO CORPORATION
发明人： Masahiro YAMAMOTO , Masayuki TAMURA , Go MIYAGAWA , Toru KATAFUCHI , Takehito KIMATA , Yuto TAMEI
CPC分类号： G01N15/1031 , G01N15/0606 , G01N15/0656 , G01N27/045 , G01N2015/0046
摘要： A sensor element which has a pair of positive and negative detection electrodes disposed on a surface of an insulation body as a detecting portion and a cover body configured to cover an opening of a cylindrical housing. The cover body is provided with gas inlet and outlet holes via which the measuring gas is introduced and discharged. The pair of detection electrodes have a plurality of wire electrodes. The wire electrodes electrically connected to the positive electrode and the wire electrodes electrically connected to the negative electrode are alternately arranged in parallel. Any one of a first insulation layer which is a narrow electrode interval Dn and a second insulation layer which is a wide electrode interval Dw, arranged between adjacent wire electrodes, and the first insulation layer arranged in a center part of the detecting portion.
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公开(公告)号：US20180187623A1
公开(公告)日：2018-07-05
申请号：US15740919
申请日：2016-06-30
申请人： DENSO CORPORATION
摘要： A filter malfunction determination apparatus includes a calculator that calculates, upon determination that a rapid output increase has occurred, an amount of change of a parameter value output from a sensor before and after the rapid output increase. The calculator calculates, based on the calculated amount of change, a correction value for correcting at least one of the parameter value output from the sensor and a malfunction determination threshold. The filter malfunction determination apparatus includes an offset corrector configured to perform, based on the correction value, offset correction of at least one of the parameter value output from the sensor and the malfunction determination threshold after determination that the rapid output increase has occurred.
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10.发明申请公开(公告)号：US20190214795A1
公开(公告)日：2019-07-11
申请号：US16088971
申请日：2017-03-24
申请人： DENSO CORPORATION
发明人： Masayuki TAMURA , Nobuo ABE , Masamichi SHIBATA
摘要： An ignition plug for an internal combustion engine includes an electrode protrusion that protrudes from an electrode base material of a ground electrode toward a discharge gap. The electrode protrusion has a base part that is integrated with the electrode base material and a cover part that is joined to the base part and faces the discharge gap. The base part has an end surface facing a protrusion direction of the base part and a side peripheral surface. An outer edge of the end surface has a curved surface. The cover part is formed from a precious metal or a precious metal alloy having a lower linear expansion coefficient than that of a material for forming the base part and covers at least a part of the side peripheral surface and the end surface of the base part. While the ignition plug is attached to an internal combustion engine and the electrode protrusion is heated and then cooled, a projection is formed on an outer surface of a portion covering the side peripheral surface of the base part.
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