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：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：US20140191773A1

公开(公告)日：2014-07-10

申请号：US14138433

申请日：2013-12-23

Applicant: DENSO CORPORATION

Inventor： Masaki SAIJOH ,  Takamasa OGURI ,  Kouji MORISHITA

IPC: G01R35/00 ,  G01N27/04

CPC classification number: G01N27/4175

Abstract: A control device for controlling an oxygen concentration sensor includes: a voltage sweeping unit for applying a voltage to the sensor for a time interval during an impedance detection process; a pre-sweeping voltage memory for storing a terminal voltage of the sensor as an initial terminal voltage just before applying the voltage; an impedance detection unit for detecting an element impedance; a voltage returning unit for returning the terminal voltage to the initial terminal voltage after a predetermined time interval has elapsed; a monitoring unit for monitoring the terminal voltage after the voltage returning unit starts returning the terminal voltage; a determination unit for determining whether a monitored terminal voltage of the sensor reaches a stored terminal voltage in the memory; and a stop unit for stopping a returning operation of the voltage returning unit when the monitored terminal voltage reaches the stored terminal voltage.

Abstract translation: 用于控制氧浓度传感器的控制装置包括：电压扫描单元，用于在阻抗检测过程期间以一段时间间隔向传感器施加电压; 用于在施加电压之前将传感器的端子电压存储为初始端电压的预扫描电压存储器; 用于检测元件阻抗的阻抗检测单元; 电压返回单元，用于在经过预定时间间隔之后将端子电压返回到初始端子电压; 监视单元，用于在电压返回单元开始返回端子电压之后监视端子电压; 确定单元，用于确定所述传感器的被监控终端电压是否达到所述存储器中存储的终端电压; 以及停止单元，用于当所监视的端子电压达到所存储的端子电压时停止所述电压返回单元的返回操作。