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：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：US20160084812A1

公开(公告)日：2016-03-24

申请号：US14849910

申请日：2015-09-10

Applicant: DENSO CORPORATION

Inventor： Satoshi NISHIMOTO ,  Masafumi UMENO ,  Yuji YAMADA

IPC: G01N33/00 ,  G01N27/04

CPC classification number: G01N33/0073 ,  G01N27/028 ,  G01N27/045

Abstract: A control apparatus that controls a gas concentration sensor includes a sweep circuit, a current detection resistor, and a calculation portion. The sweep circuit supplies the gas concentration sensor with a sweep current. The calculation portion calculates impedance of the gas concentration sensor. The gas concentration sensor and the current detection resistor are sequentially connected in series along a direction from the sweep circuit to a reference voltage. The sweep circuit has a constant voltage circuit and a reference resistor. An increasing and decreasing tendency of a manufacturing variation of the reference resistor and an increasing and decreasing tendency of a manufacturing variation of the current detection resistor are identical. The calculation portion divides a product of a resistance value of the current detection resistor and a time variation of applied voltage to the gas concentration sensor by a time variation of applied voltage to the current detection resistor.

Abstract translation: 控制气体浓度传感器的控制装置包括扫描电路，电流检测电阻和计算部。 扫描电路为气体浓度传感器提供扫描电流。 计算部分计算气体浓度传感器的阻抗。 气体浓度传感器和电流检测电阻器沿着从扫描电路到参考电压的方向依次串联连接。 扫描电路具有恒压电路和参考电阻。 参考电阻的制造变化的增加和减少的趋势以及电流检测电阻器的制造变化的增加和减少的趋势是相同的。 计算部通过对电流检测电阻器的施加电压的时间变化，将电流检测电阻器的电阻值和施加电压的时间变化量乘以气体浓度传感器。

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。