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公开(公告)号：US11840949B2
公开(公告)日：2023-12-12
申请号：US17487254
申请日：2021-09-28
申请人： DENSO CORPORATION
发明人： Kazuhiko Koike , Keisuke Mizutani , Kana Asaoku
CPC分类号： F01N3/0222 , B01D39/2068 , B01D46/2429 , B01D46/24491 , B01D46/24492 , B01D53/94 , B01J35/04
摘要： An exhaust gas purification filter includes a honeycomb structure part and sealing parts. The honeycomb structure part has a porous partition wall and a plurality of cells defined by the partition wall to form exhaust gas flow paths. The sealing parts seal alternately a gas inflow-side end face or a gas outflow-side end face of the cells. The exhaust gas purification filter includes fine pores with diameters of 10 μm or less measured by the mercury intrusion method that account for 5% or more of all pores by volume in the honeycomb structure part. The partition wall has a plurality of communication pores communicating between the cells adjacent to the partition wall and has constricted communication pore of which a largest diameter Φ1 and a smallest diameter Φ2 satisfy relationships Φ1≥50, 100×Φ2/Φ1≤20.
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公开(公告)号：US11231354B2
公开(公告)日：2022-01-25
申请号：US16687737
申请日：2019-11-19
申请人： DENSO CORPORATION
发明人： Kazuhiko Koike , Hirokatsu Imagawa
摘要： A method of manufacturing a particulate matter detection element for detecting particulate matter in a gas to be measured includes manufacturing flat-shaped conductor layers, flat-shaped insulating layers, a laminated structure in which the conductor layers and the insulating layers are alternately laminated, and a detecting unit having the conductor layers of different polarities as a pair of detection electrodes on a cross section of the laminated structure. The conductor layers each have a constant thickness, and include conductor layer planar portions having a stripped-pattern cross section, and tapered conductor layer end edge portions each having a triangular cross section, provided on both sides of the respective conductor layer planar portions.
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公开(公告)号：US10520415B2
公开(公告)日：2019-12-31
申请号：US15110447
申请日：2015-01-09
申请人： DENSO CORPORATION
发明人： Kazuhiko Koike , Hirokatsu Imagawa
摘要： A particulate matter detection element for detecting particulate matter in a gas to be measured includes flat-shaped conductor layers, flat-shaped insulating layers, a laminated structure in which the conductor layers and the insulating layers are alternately laminated, and a detecting unit having the conductor layers of different polarities as a pair of detection electrodes on a cross section of the laminated structure. The conductor layers each have a constant thickness, and include conductor layer planar portions having a stripped-pattern cross section, and tapered conductor layer end edge portions each having a triangular cross section, provided on both sides of the respective conductor layer planar portions.
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公开(公告)号：US11230960B2
公开(公告)日：2022-01-25
申请号：US16713787
申请日：2019-12-13
申请人： DENSO CORPORATION
发明人： Kensuke Takizawa , Kazuhiko Koike , Go Miyagawa
摘要： Failure detection apparatus for a particulate filter includes: a sensor having a particulate matter detection unit that outputs a signal corresponding to the amount of accumulated PM, and a heater unit that heats the particulate matter detection unit; a regeneration control unit that causes the heater unit to heat the particulate matter detection unit to a regeneration temperature allowing the particulate matter to be burned off; a start detection unit that determines the start of the internal combustion engine; failure determination unit that determines whether exhaust gas contains water droplets while the engine is in operation; a heating control unit that causes the heater unit to heat the particulate matter detection unit to a first temperature allowing the accumulated particulate matter to remain and the moisture included in the particulate matter to be removed; and failure determination unit that determines whether the filter has failure based on a sensor output value.
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公开(公告)号：US10946369B2
公开(公告)日：2021-03-16
申请号：US16831947
申请日：2020-03-27
申请人： DENSO CORPORATION
发明人： Kazuhiko Koike , Keisuke Mizutani , Hiroaki Kayama
摘要： A honeycomb structure body has a skin part of a cylindrical shape and a honeycomb structural part formed with the skin part together in a monolithic body. The skin part and the honeycomb structural part have partition walls of a porous structure. The cells have first cells arranged adjacent to the skin part and second cells arranged adjacent to the first cells. The skin part, the first cells and the second cells form an outer peripheral section. A central section is arranged inside the outer peripheral section. The honeycomb structure body satisfies a relationship in which a thermal expansion coefficient of the outer peripheral section is greater than a thermal expansion coefficient of the central section.
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公开(公告)号：US10352226B2
公开(公告)日：2019-07-16
申请号：US15538796
申请日：2015-12-21
申请人： DENSO CORPORATION
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：US11767779B2
公开(公告)日：2023-09-26
申请号：US17451823
申请日：2021-10-22
申请人： DENSO CORPORATION
发明人： Hiroaki Kayama , Kazuhiko Koike
CPC分类号： F01N3/10 , B01J35/04 , B01J35/1033 , B01J35/1076 , F01N2570/12
摘要： Provided is an exhaust gas purifying filter used with a HC purifying catalyst supported thereon. Numerous pores are formed in partitions of the exhaust gas purifying filter. In a cross-section of the partition, pores are open at a passage surface, having an open end of which the opening diameter is 50 μm or larger. In the cross-section of the partitions, the partitions include a narrow part where a pore diameter is 5 μm or more and the pore diameter becomes a minimum in a region. In the cross-section of the partitions, the region is positioned between a pair of virtual lines L1 and L2 extending from opposing sides of the opening end to a passage surface positioned opposite to the opening end along the wall thickness direction X, Z. The pore diameter at the narrow part is 6% or more and less than or equal to 20% of the opening diameter.
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公开(公告)号：US10890517B2
公开(公告)日：2021-01-12
申请号：US16086391
申请日：2017-02-09
申请人： DENSO CORPORATION
发明人： Kazuhiko Koike , Masahiro Yamamoto
摘要： A particulate matter detection device includes a sensor unit which has a detection unit provided with a pair of electrodes and a heater unit provided with a heater electrode and which is configured to output a signal corresponding to the amount of particulate matter, and a sensor control unit which detects the number of particles of the particulate matter. The sensor control unit has a capture control unit, a heating control unit to heat the detection unit to a first temperature at which a SOF is volatilizable and a second temperature at which soot is burnable, an output changing ratio calculation unit to calculate a ratio between a first output value at the first temperature and a second output value as the maximum output upon heating to the second temperature, and a particle number calculation unit to estimate the average particle diameter of the particulate matter from a value corrected based on the temperature of the sensor unit at the second output value to calculate the number of particles.
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公开(公告)号：US11878263B2
公开(公告)日：2024-01-23
申请号：US17487111
申请日：2021-09-28
申请人： DENSO CORPORATION
发明人： Keisuke Mizutani , Kazuhiko Koike , Mikio Ishihara
CPC分类号： B01D46/2429 , B01D46/249 , B01D46/24492 , F01N3/022 , B01D2279/30 , F01N2330/06 , F01N2330/32
摘要： An exhaust gas purification filter is configured to he disposed in an exhaust passage in a gasoline engine. The exhaust gas purification filter includes partition walls including a plurality of pores, a plurality of cells partitioned by the partition walls, and sealing portions alternately sealing ends of a plurality of the cells in the exhaust gas purification filter. The partition walls each have an average pore diameter of more than 16 μm and less than 21 μm, and have a ratio of an average surface opening diameter of the pores in a partition wall surface to the average pore diameter of the partition wall of 0.66 or more and 0.94 or less.
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公开(公告)号：US10578518B2
公开(公告)日：2020-03-03
申请号：US15516163
申请日：2015-10-02
申请人： DENSO CORPORATION
IPC分类号： G01M15/10 , G01N15/02 , F02D41/14 , F02D41/02 , G01N15/06 , G01N1/22 , G01N35/00 , G01N27/04 , F01N3/021 , F01N11/00 , G01N15/08
摘要： A control unit (6) estimates an output value of a PM sensor (S2) located at a downstream side of a DPF used as a reference filter, and detects whether the estimated output value exceeds a predetermined value (S3). When the estimated output value exceeds the predetermined value (YES in S3), the control unit detects an output value of the PM sensor (S4), and a heater heats the PM sensor (S5). The control unit detects an output value of the PM sensor (S6) after the PM sensor is heated, and calculates a change ratio of the output values of the PM sensor before and after heating (S7). The control unit estimates an average particle size of PM based on the calculated change ratio (S8), and detects whether the DPF has failed based on a comparison result of a corrected output value of the PM sensor with a threshold value.
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