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。

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。

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。

公开(公告)号：US20150041318A1

公开(公告)日：2015-02-12

申请号：US14455051

申请日：2014-08-08

Applicant: DENSO CORPORATION

Inventor： Yuji YAMADA ,  Mikiyasu MATSUOKA ,  Kenichi ONO ,  Takamasa OGURI ,  Takao MISHIMA

IPC: G01N27/409

CPC classification number: G01N27/409 ,  F01N3/101 ,  F01N11/007 ,  F01N2900/1402 ,  Y02T10/22

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. The electrodes include an atmosphere side electrode, which becomes a positive side at a time of outputting an electromotive force from the sensor element, and an exhaust side electrode, which becomes a negative side at the time of outputting the electromotive force from the sensor element. A resistor is provided in an electric path that connects between the atmosphere side electrode and a ground. When the sensor element generates the electromotive force, the resistor conducts an electric current, which is generated while using the electromotive force as an electric power source, to induce a change in an output characteristic of the O2 sensor.

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电极之间。 电极包括在从传感器元件输出电动势时成为正侧的气氛侧电极和在从传感器元件输出电动势时变为负侧的排气侧电极。 在连接大气侧电极和地之间的电路中设置电阻器。 当传感器元件产生电动势时，电阻器传导在使用电动势作为电源时产生的电流，以引起O2传感器的输出特性的变化。

公开(公告)号：US20160201540A1

公开(公告)日：2016-07-14

申请号：US14910781

申请日：2014-07-31

Applicant: DENSO CORPORATION

Inventor： Mikiyasu MATSUOKA ,  Yasuo MUKAI ,  Shingo NAKATA ,  Yuji YAMADA

IPC: F01N11/00 ,  F01N13/00 ,  G01M15/10

CPC classification number: F01N11/007 ,  F01N11/002 ,  F01N13/008 ,  F01N2550/02 ,  G01M15/102 ,  G01N27/26 ,  G01N27/4065 ,  G01N27/409 ,  G01N33/007

Abstract: An O2 sensor has a sensor element, which includes a solid electrolyte layer and a pair of electrodes, while the solid electrolyte layer is interposed between the electrodes. The O2 sensor outputs an electromotive force signal in response to an air-to-fuel ratio of exhaust gas of an engine, which serves as a sensing subject. A constant current circuit, which induces a flow of a predetermined constant electric current between the pair of electrodes of a sensor element, and a current sensing arrangement, which senses a current value of an actual electric current that is conducted through the sensor element, are provided. A microcomputer determines whether an abnormality of the constant current circuit is present based on the current value of the electric current, which is sensed with the current sensing arrangement, in a case where the constant current is induced by 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，而固体电解质层介于电极之间。 O2传感器响应作为感测对象的发动机的排气的空燃比而输出电动势信号。 在传感器元件的一对电极之间引起预定恒定电流流动的恒流电路和感测通过传感器元件传导的实际电流的电流值的电流检测装置是 提供。 在由恒流电路引起的恒定电流的情况下，微型计算机基于在电流检测装置感测到的电流的当前值来判定是否存在恒流电路的异常。

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。

公开(公告)号：US20130206596A1

公开(公告)日：2013-08-15

申请号：US13761542

申请日：2013-02-07

Applicant: DENSO CORPORATION

Inventor： Hiroshi KATSURAHARA ,  Shingo NAKATA ,  Mikiyasu MATSUOKA

IPC: G01N27/407

CPC classification number: G01N27/407 ,  F01N11/007 ,  F01N2550/02 ,  F01N2560/025 ,  F01N2900/1402 ,  F02D41/0235 ,  F02D41/123 ,  F02D41/1441 ,  F02D41/1454 ,  F02D41/1474 ,  F02D41/1495 ,  Y02T10/47

Abstract: A deterioration diagnosis device, which performs a deterioration diagnosis of a catalyst, includes an exhaust-gas sensor provided downstream of the catalyst in a flow direction of exhaust gas such that an output value of the exhaust-gas sensor is used at least in the deterioration diagnosis. The deterioration diagnosis device further includes the constant current supply portion which applies a voltage to a sensor element of the exhaust-gas sensor to change an output characteristic of the exhaust-gas sensor, a response-time detection portion which detects a response time required for the output value of the exhaust-gas sensor to change from a rich threshold to a lean threshold, a response-time correction portion which controls the constant current supply portion to change the output characteristic of the exhaust-gas sensor so as to shorten the response time when the response time is longer than a predetermined reference time.

Abstract translation: 执行催化剂劣化诊断的劣化诊断装置包括排气传感器，其设置在排气的流动方向上的催化剂下游，使得废气传感器的输出值至少使用在劣化中 诊断。 劣化诊断装置还包括对排气传感器的传感器元件施加电压以改变排气传感器的输出特性的恒流供给部，响应时间检测部，其检测所需的响应时间 排气传感器的输出值从丰富阈值变化到稀薄阈值;响应时间校正部，其控制恒流供给部，改变排气传感器的输出特性，以缩短响应 当响应时间长于预定的参考时间时。

公开(公告)号：US20160202210A1

公开(公告)日：2016-07-14

申请号：US15023435

申请日：2014-09-25

Applicant: DENSO CORPORATION

Inventor： Shingo NAKATA ,  Mikiyasu MATSUOKA ,  Yasuo MUKAI

IPC: G01N27/416 ,  G01N27/407 ,  G01N33/00

CPC classification number: G01N27/4163 ,  F02D41/123 ,  F02D41/1454 ,  F02D41/1495 ,  G01N27/4065 ,  G01N27/4071 ,  G01N27/409 ,  G01N33/007 ,  G01N33/0073

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 conducts an abnormality diagnosis of an output response of the sensor element on the basis of a state of variation in an electromotive force output. Further, when the microcomputer conducts the abnormality diagnosis, the microcomputer restricts a supply of the constant current by the constant current circuit before conducting the abnormality diagnosis.

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。 微型计算机基于电动势输出的变化状态对传感器元件的输出响应进行异常诊断。 此外，当微计算机执行异常诊断时，微机在进行异常诊断之前，通过恒流电路限制恒定电流的供给。

公开(公告)号：US20130192211A1

公开(公告)日：2013-08-01

申请号：US13752791

申请日：2013-01-29

Applicant: DENSO CORPORATION

Inventor： Kosuke NAKANO ,  Shingo NAKATA ,  Mikiyasu MATSUOKA

IPC: F01N9/00

CPC classification number: F01N9/005 ,  F02D41/1441 ,  F02D41/1454 ,  F02D2041/1431

Abstract: An emission control system for an engine includes a catalyst and an exhaust-gas sensor provided downstream of the catalyst in a flow direction of exhaust gas. The exhaust-gas sensor includes a sensor element that includes a pair of electrodes and a solid electrolyte body located between the electrodes. The emission control system further includes a constant current supply portion that changes an output characteristic of the exhaust-gas sensor by applying a constant current between the electrodes, a catalytic-state determination portion which determines a rich/lean state of the catalyst, a rich direction control portion which performs and terminates a rich direction control depending on the rich/lean state of the catalyst, a lean direction control portion which performs a lean direction control after the rich direction control, and a characteristic control portion which performs a lean responsiveness control at least during the lean direction control.

Abstract translation: 发动机的排放控制系统包括催化剂和排气传感器，其设置在排气的流动方向上的催化剂下游。 排气传感器包括传感器元件，其包括一对电极和位于电极之间的固体电解质体。 排放控制系统还包括通过在电极之间施加恒定电流来改变排气传感器的输出特性的恒定电流供给部，确定催化剂的富/贫状态的催化态判定部，富 方向控制部分，其根据催化剂的浓/贫状态执行和终止丰富方向控制;在丰富方向控制之后进行瘦方向控制的瘦方向控制部分，以及执行精益响应控制的特性控制部分 至少在倾向控制期间。

公开(公告)号：US20210363910A1

公开(公告)日：2021-11-25

申请号：US17392774

申请日：2021-08-03

Applicant: DENSO CORPORATION

Inventor： Mikiyasu MATSUOKA ,  Tomoo KAWASE ,  Toshiyuki ISHII

IPC: F01N11/00 ,  F01N9/00

Abstract: A particulate matter sensor includes a sensor element that includes a measurement member and a heater. An anomaly determiner performs determination that there is a break fault in a signal path of the measurement signal in response to both
(1) A first determiner, which determines whether a first measurement value of the measurement signal is higher than or equal to a predetermined normal determination threshold while the measurement voltage is applied between the measurement electrodes and the temperature of the measurement member is controlled at a first determination temperature, making a negative determination
(2) A second determiner performing negative determination while the measurement voltage is applied between the measurement electrodes and the temperature of the measurement member is controlled within a predetermined temperature range that is higher than the first determination temperature and lower than a second determination temperature, making a negative determination