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公开(公告)号：US20150041334A1
公开(公告)日：2015-02-12
申请号：US14454792
申请日：2014-08-08
Applicant: DENSO CORPORATION
Inventor： Mikiyasu MATSUOKA , Shingo NAKATA , Takao MISHIMA
IPC: G01N27/407
CPC classification number: G01N27/407 , F01N3/101 , F01N13/008 , F01N2560/02 , F01N2900/1621 , F02D41/0235 , F02D41/1441 , F02D41/1454 , F02D41/1456 , F02D41/1476 , F02D41/1495 , F02D2250/36
Abstract: A catalytic conversion characteristic of a catalyst, which indicates a relationship between an air-to-fuel ratio and a catalytic conversion efficiency of the catalyst, includes a second air-to-fuel ratio point, which is a point of starting an outflow of NOx from the catalyst and is located on a rich side of a first air-to-fuel ratio point that forms an equilibrium point for a rich component and oxygen. A constant current circuit, which induces a flow of an electric current from an exhaust side electrode to an atmosphere side electrode through a solid electrolyte layer in a sensor element, is connected to the sensor element. A microcomputer controls a current value of the electric current, which is induced by the constant current circuit, based on a difference between the first air-to-fuel ratio point and the second air-to-fuel ratio point at the catalyst.
Abstract translation: 催化剂的催化转化特性，其表示空燃比与催化剂的催化转化效率之间的关系，包括第二空燃比点，其是开始NOx流出的点 并且位于形成富成分和氧的平衡点的第一空气 - 燃料比点的富侧。 传感器元件连接有恒定电流电路，其通过传感器元件中的固体电解质层引起从排气侧电极到大气侧电极的电流。 微型计算机基于第一空气燃料比点与催化剂的第二空气 - 燃料比点之间的差异来控制由恒流电路感应出的电流的电流值。
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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
Applicant: DENSO CORPORATION
Inventor： Go MIYAGAWA , Kouji ANDOH , Masayuki TAMURA , Hirokatsu IMAGAWA , Takao MISHIMA , Hideki YAMADA , Masahiro YAMAMOTO
CPC classification number: G01M15/102 , F01N11/002 , G01M15/10 , G01N15/0606 , G01N15/0656 , G01N27/04 , G01N2015/0046
Abstract: 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：US20150041319A1
公开(公告)日：2015-02-12
申请号：US14454769
申请日：2014-08-08
Applicant: DENSO CORPORATION
Inventor： Yuji YAMADA , Mikiyasu MATSUOKA , Kenichi ONO , Takamasa OGURI , Takao MISHIMA
IPC: G01N27/407
CPC classification number: G01N27/407 , F01N3/101 , F01N11/00 , F01N13/0093 , F01N2550/00 , F01N2560/025 , F01N2570/14 , Y02T10/22 , Y02T10/47
Abstract: An O2 sensor has a sensor element, which includes a solid electrolyte layer and a pair of electrodes. The solid electrolyte layer is held between the electrodes, which includes an atmosphere side electrode and an exhaust side electrode. A constant current circuit is installed in an electric path, which connects between the atmosphere side electrode and a ground, to induce a flow of a predetermined constant electric current between the electrodes through the solid electrolyte layer. When the sensor element generates an electromotive force, the constant current circuit conducts an electric current, which is generated while using the electromotive force of the sensor element as an electric power source, to induce the flow of the predetermined constant electric current between the electrodes in an electromotive force range, which is equal to or larger than an electromotive force of the sensor element generated at a stoichiometric air-to-fuel ratio.
Abstract translation: O2传感器具有传感器元件，其包括固体电解质层和一对电极。 固体电解质层保持在包括大气侧电极和排气侧电极的电极之间。 恒流电路安装在连接在大气侧电极和地之间的电路中，以通过固体电解质层引起电极之间的预定恒定电流的流动。 当传感器元件产生电动势时，恒流电路传导使用传感器元件的电动势作为电源产生的电流，以引起电极之间的预定恒定电流的流动 电动势范围等于或大于以理论空燃比产生的传感器元件的电动势。
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公开(公告)号：US20180050307A1
公开(公告)日：2018-02-22
申请号：US15553699
申请日：2016-02-12
Applicant: DENSO CORPORATION
Inventor： Shingo NAKATA , Takao MISHIMA
CPC classification number: B01D53/9454 , B01D39/20 , B01D46/2418 , B01D53/94 , B01D2279/30 , B01J35/04 , B01J37/0217 , F01N3/022 , F01N3/0222 , F01N3/023 , F01N3/035 , F01N3/101 , F01N3/24 , F01N3/28 , F01N2330/30 , F02D41/029 , F02D41/1446 , Y02T10/22
Abstract: An exhaust purification device purifies an exhaust gas exhausted from an internal combustion engine. The exhaust purification device has a three-way catalytic agent that is located in an exhaust passage of the internal combustion engine and a particulate filter that is located downstream of the three-way catalytic agent in the exhaust passage and that collects an exhaust particulate. The particulate filter is provided with cells that includes sealed-inlet cells of which upstream ends are sealed and through cells through which an upstream side and a downstream side of the particulate filter communicate with each other. The particulate filter is arranged at a location where a temperature of the exhaust gas reaching an upstream end of the particulate filter is higher than or equal to a combustion temperature of the exhaust particulate, when the three-way catalytic agent is in an active state and when the internal combustion engine is operated.
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公开(公告)号：US20170138890A1
公开(公告)日：2017-05-18
申请号：US15417304
申请日：2017-01-27
Applicant: DENSO CORPORATION
Inventor： Mikiyasu MATSUOKA , Shingo NAKATA , Takao MISHIMA
IPC: G01N27/407 , F01N13/00 , F01N3/10
CPC classification number: G01N27/407 , F01N3/101 , F01N13/008 , F01N2560/02 , F01N2900/1621 , F02D41/0235 , F02D41/1441 , F02D41/1454 , F02D41/1456 , F02D41/1476 , F02D41/1495 , F02D2250/36
Abstract: A catalytic conversion characteristic of a catalyst, which indicates a relationship between an air-to-fuel ratio and a catalytic conversion efficiency of the catalyst, includes a second air-to-fuel ratio point, which is a point of starting an outflow of NOx from the catalyst and is located on a rich side of a first air-to-fuel ratio point that forms an equilibrium point for a rich component and oxygen. A constant current circuit, which induces a flow of an electric current from an exhaust side electrode to an atmosphere side electrode through a solid electrolyte layer in a sensor element, is connected to the sensor element. A microcomputer controls a current value of the electric current, which is induced by the constant current circuit, based on a difference between the first air-to-fuel ratio point and the second air-to-fuel ratio point at the catalyst.
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Patent Agency Ranking
公开(公告)号：US20170138284A1
公开(公告)日：2017-05-18
申请号：US15335121
申请日：2016-10-26
Applicant: HONDA MOTOR CO., LTD. , DENSO CORPORATION
Inventor： Tatsuya UCHIMOTO , Ken OGAWA , Hiroshi AMAIKE , Shinichi OKUNISHI , Takehito KIMATA , Takao MISHIMA
CPC classification number: F02D41/0235 , B01D53/9431 , B01D53/9445 , B01D53/9495 , B01D2255/91 , B01D2258/012 , F01N3/0814 , F01N3/0842 , F01N3/0885 , F01N3/101 , F01N3/36 , F01N11/00 , F01N2550/03 , F01N2560/026 , F01N2570/14 , F01N2610/03 , F01N2900/0404 , F01N2900/0416 , F01N2900/0422 , F01N2900/1402 , F02D41/0275 , F02D41/1463 , F02D41/1475 , F02D41/26 , Y02A50/2344 , Y02T10/22 , Y02T10/47
Abstract: An exhaust gas purifying apparatus for an internal combustion engine, in which a NOx absorbing catalyst and a NOx concentration sensor for detecting a NOx concentration in exhaust gases of the engine, are provided in an exhaust passage of the engine. A rich spike for temporarily enriching the air-fuel ratio is performed, and an execution timing of the rich spike is determined based on a detected output from the NOx concentration sensor. Performing the rich spike is determined to be unnecessary during a reducing state period from the time the rich spike ends to the time a preset time period has elapsed, and is also determined to be unnecessary when a change tendency of the detected output is determined to be an output decreasing state where the detected output is decreasing. The execution timing of the rich spike is determined using the detected output when the change tendency is determined to be an output staying/increasing state where the detected output is staying at a constant value or increasing after the end timing of the reducing state period.
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公开(公告)号：US20160230686A1
公开(公告)日：2016-08-11
申请号：US15023441
申请日：2014-09-25
Applicant: DENSO CORPORATION
Inventor： Takao MISHIMA , Mikiyasu MATSUOKA , Shingo NAKATA
IPC: F02D41/14 , F01N13/00 , G01N27/406 , G01N27/409 , G01N27/416 , G01N27/417
CPC classification number: F02D41/1455 , F01N13/008 , F02D41/064 , F02D41/123 , F02D41/1454 , F02D41/1494 , G01N27/4065 , G01N27/407 , G01N27/409 , G01N27/4161 , G01N27/4175
Abstract: An O2 sensor includes a sensor element using a solid electrolyte layer and a pair of electrodes placed at a position to interpose the solid electrolyte layer, detects an exhaust gas from an internal combustion engine as an object of a detection, and outputs an electromotive force signal depending on an air-fuel ratio of the exhaust gas. The sensor element is connected with a constant current circuit supplying a constant current that is prescribed. A microcomputer calculates a resistance value (element resistance) of the sensor element, and performs a restriction on the constant current supplied by the constant current circuit on the basis of the element resistance.
Abstract translation: O2传感器包括使用固体电解质层的传感器元件和置于固体电解质层的位置的一对电极，检测作为检测对象的来自内燃机的废气，并输出电动势信号 取决于废气的空燃比。 传感器元件与提供规定的恒定电流的恒流电路连接。 微计算机计算传感器元件的电阻值（元件电阻），并根据元件电阻对恒流电路提供的恒定电流进行限制。
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公开(公告)号：US20170354911A1
公开(公告)日：2017-12-14
申请号：US15542215
申请日：2016-01-05
Applicant: DENSO CORPORATION
Inventor： Hironori NIWA , Syusaku YAMAMURA , Mikio ISHIHARA , Takao MISHIMA , Shingo NAKATA , Hiroaki FUJII , Kouta YAMAKOSHI , Akira MIYASHITA
CPC classification number: B01D46/247 , B01D39/2068 , B01D46/2429 , B01D46/2459 , B01D2046/2481 , B01D2046/2485 , B01D2046/2496 , B01D2279/30 , F01N3/022 , F01N3/0222 , F01N2330/00 , F01N2330/06 , F01N2330/34 , F01N2330/48 , Y02T10/20
Abstract: An exhaust gas filter purifies exhaust gas containing particulate matter emitted from an engine. The filter has cell walls and cells surrounded by the cell walls. Through pores formed in the cell walls, adjacent cells are communicated. The cells have open cells opening along an axial direction of the filter, and plugged cells. An upstream end part of the plugged cell is plugged by a plug member. On a cross section perpendicular to the axial direction, a flow-passage sectional area of the plugged cells is larger than a flow-passage sectional area of the open cells. A total length of the filter is not less than a first standard value and is not more than a critical length Lm determined by respective predetermined equations.
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公开(公告)号：US20160209352A1
公开(公告)日：2016-07-21
申请号：US15023446
申请日：2014-09-25
Applicant: DENSO CORPORATION
Inventor： Takao MISHIMA , Shingo NAKATA , Mikiyasu MATSUOKA , Tomoo KAWASE , Yuuji YAMADA
IPC: G01N27/406 , G01N27/41 , G01N27/407
CPC classification number: G01N27/4065 , F02D41/064 , F02D41/123 , F02D41/1456 , F02D41/1494 , F02D41/2432 , F02D41/2474 , G01N27/4067 , G01N27/4071 , G01N27/41
Abstract: An O2 sensor includes a sensor element using a solid electrolyte layer and a pair of electrodes placed at a position to interpose the solid electrolyte layer, detects an exhaust gas from an internal combustion engine as an object of a detection, and outputs an electromotive force signal depending on an air-fuel ratio of the exhaust gas. The sensor element is connected with a constant current circuit supplying a constant current that is prescribed. A microcomputer calculates an element resistance, determines whether the air-fuel ratio is at least rich, lean, or stoichiometric, on the basis of a comparison between an electromotive force output of the electrogenic cell and a prescribed threshold. Further, the microcomputer controls the constant current supplied by the constant current circuit on the basis of the element resistance.
Abstract translation: O2传感器包括使用固体电解质层的传感器元件和置于固体电解质层的位置的一对电极，检测作为检测对象的来自内燃机的废气，并输出电动势信号 取决于废气的空燃比。 传感器元件与提供规定的恒定电流的恒流电路连接。 微计算机基于电致电池的电动势输出与规定的阈值之间的比较来计算元件电阻，确定空燃比是否至少为浓，稀，或化学计量。 此外，微计算机基于元件电阻来控制由恒流电路提供的恒定电流。
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公开(公告)号：US20150041320A1
公开(公告)日：2015-02-12
申请号：US14455089
申请日：2014-08-08
Applicant: DENSO CORPORATION
Inventor： Yuji YAMADA , Mikiyasu MATSUOKA , Takamasa OGURI , Takao MISHIMA
IPC: G01N27/407 , F01N11/00
CPC classification number: G01N27/407 , F01N3/101 , F01N11/007 , F01N2560/025 , F01N2560/14 , F01N2900/0416 , F01N2900/1402 , F01N2900/1621 , F02D41/1454 , F02D41/1495 , G01N27/4065 , Y02T10/22 , Y02T10/47
Abstract: An O2 sensor has a sensor element, which includes a solid electrolyte layer and a pair of electrodes. The solid electrolyte layer is held between the electrodes, which includes an atmosphere side electrode and an exhaust side electrode. A constant current circuit is installed in an electric path, which connects between the atmosphere side electrode and a ground, to induce a flow of a predetermined constant electric current between the electrodes through the solid electrolyte layer. A voltage circuit is installed in an electric path, which connects between the exhaust side electrode and a ground, to increase an electric potential of the exhaust side electrode by a predetermined amount relative to an electric potential at an output side of the constant current circuit, from which the electric current flows out of the constant current circuit.
Abstract translation: O2传感器具有传感器元件，其包括固体电解质层和一对电极。 固体电解质层保持在包括大气侧电极和排气侧电极的电极之间。 恒流电路安装在连接在大气侧电极和地之间的电路中，以通过固体电解质层引起电极之间的预定恒定电流的流动。 电压电路安装在连接在排气侧电极和地之间的电路中，相对于恒流电路的输出侧的电位使排气侧电极的电位增加预定量， 电流从恒流电流流出。
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