公开(公告)号：US20080060939A1

公开(公告)日：2008-03-13

申请号：US11884262

申请日：2006-02-16

申请人： Yoshinori Inoue ,  Norikazu Ieda ,  Masahiro Tanaka ,  Reina Fukagai

发明人： Yoshinori Inoue ,  Norikazu Ieda ,  Masahiro Tanaka ,  Reina Fukagai

IPC分类号： G01N27/28

CPC分类号： G01N27/4175

摘要： To provide a malfunction diagnosing method and apparatus capable of reliably determining a malfunction even where the malfunction occurs in a common wire connecting a gas sensor and a control circuit for driving it. In a gas concentration measurement unit 1 having a sensor control circuit 50 which is connected to a sensor element 10 including an oxygen pump cell 14 and an oxygen concentration detection cell 24 and controls and drives this sensor element 10, a variation state of a terminal voltage at one connecting point (specifically, a Vs+ terminal) other than connecting points between electrodes facing a measurement chamber of each cell 14 and 24 and a common wire 24 is detected by a malfunction detection circuit 53 and an arithmetic processor 54. Based on this variation state of the terminal voltage, diagnosis of malfunction in the common wire 42 is executed. When the common wire 42 is broken, the terminal voltage at the Vs+ terminal varies with oscillations. Therefore, the malfunction detection circuit 53 and the arithmetic processor 54 detect this voltage variation with oscillations to output a malfunction determination signal to a CPU.

摘要翻译： 提供即使在连接气体传感器和用于驱动气体传感器的控制电路的公共线中发生故障的情况下也能够可靠地确定故障的故障诊断方法和装置。 在具有传感器控制电路50的气体浓度测量单元1中，传感器控制电路50连接到包括氧气泵室14和氧浓度检测单元24的传感器元件10，并且控制和驱动该传感器元件10，端子电压的变化状态 在面对每个单元14和24的测量室的电极和公共线24之间的连接点之外的一个连接点（具体地，Vs +端子）由故障检测电路53和运算处理器54检测。基于该变化 执行端子电压的状态，执行公共线42中的故障诊断。 当公共线42断开时，Vs +端子的端子电压随振荡而变化。 因此，故障检测电路53和算术处理器54通过振荡检测该电压变化，向CPU输出故障判定信号。

公开(公告)号：US07850840B2

公开(公告)日：2010-12-14

申请号：US11884262

申请日：2006-02-16

申请人： Yoshinori Inoue ,  Norikazu Ieda ,  Masahiro Tanaka ,  Reina Fukagai

发明人： Yoshinori Inoue ,  Norikazu Ieda ,  Masahiro Tanaka ,  Reina Fukagai

IPC分类号： G01N27/41

CPC分类号： G01N27/4175

摘要： To provide a malfunction diagnosing method and apparatus capable of reliably determining a malfunction even where the malfunction occurs in a common wire connecting a gas sensor and a control circuit for driving it. In a gas concentration measurement unit 1 having a sensor control circuit 50 which is connected to a sensor element 10 including an oxygen pump cell 14 and an oxygen concentration detection cell 24 and controls and drives this sensor element 10, a variation state of a terminal voltage at one connecting point (specifically, a Vs+ terminal) other than connecting points between electrodes facing a measurement chamber of each cell 14 and 24 and a common wire 24 is detected by a malfunction detection circuit 53 and an arithmetic processor 54. Based on this variation state of the terminal voltage, diagnosis of malfunction in the common wire 42 is executed. When the common wire 42 is broken, the terminal voltage at the Vs+ terminal varies with oscillations. Therefore, the malfunction detection circuit 53 and the arithmetic processor 54 detect this voltage variation with oscillations to output a malfunction determination signal to a CPU.

摘要翻译： 提供即使在连接气体传感器和用于驱动气体传感器的控制电路的公共线中发生故障的情况下也能够可靠地确定故障的故障诊断方法和装置。 在具有传感器控制电路50的气体浓度测量单元1中，传感器控制电路50连接到包括氧气泵室14和氧浓度检测单元24的传感器元件10，并且控制和驱动该传感器元件10，端子电压的变化状态 在面对每个单元14和24的测量室的电极和公共线24之间的连接点之外的一个连接点（具体地，Vs +端子）由故障检测电路53和运算处理器54检测。基于该变化 执行端子电压的状态，执行公共线42中的故障诊断。 当公共线42断开时，Vs +端子的端子电压随振荡而变化。 因此，故障检测电路53和算术处理器54通过振荡检测该电压变化，向CPU输出故障判定信号。

公开(公告)号：US07614392B2

公开(公告)日：2009-11-10

申请号：US12033525

申请日：2008-02-19

申请人： Reina Fukagai ,  Norikazu Ieda ,  Masahiro Tanaka ,  Hiroshi Inagaki ,  Kunihiko Takamatsu ,  Masaki Hirata ,  Takahiro Suzuki

发明人： Reina Fukagai ,  Norikazu Ieda ,  Masahiro Tanaka ,  Hiroshi Inagaki ,  Kunihiko Takamatsu ,  Masaki Hirata ,  Takahiro Suzuki

IPC分类号： F02D41/22

CPC分类号： F02D41/1456 ,  F02D41/123 ,  F02D41/126 ,  F02D41/1495 ,  F02D2250/14 ,  G01N27/4175

摘要： A gas sensor diagnostic method includes: a fuel supply detecting step of detecting an interruption of a fuel supply to the internal combustion engine, and a restart of the fuel supply after the interruption of the fuel supply; a response time period accumulating step of determining a response time period by accumulating a first time period that the sensor output value reaches from a first threshold value to a second threshold value after the detection of the interruption of the fuel supply, and a second time period that the sensor output value reaches from a third threshold value to a fourth threshold value after the detection of the restart of the fuel supply after the interruption of the fuel supply; and an abnormal state diagnosing section of determining an abnormal state of the gas sensor when the response time period is greater than a predetermined time period.

摘要翻译： 一种气体传感器诊断方法，包括：燃料供给检测步骤，检测对内燃机的燃料供给的中断，以及在燃料供给中断之后重新启动燃料供给; 响应时间累积步骤，通过在检测到燃料供给中断之后，将传感器输出值从第一阈值到达第一阈值的第一时间段确定为响应时间段，以及第二时间段 在燃料供应中断之后检测到燃料供应的重新启动之后，传感器输出值从第三阈值到达第四阈值; 以及异常状态诊断部，其在所述响应时间段大于预定时间段时确定所述气体传感器的异常状态。

公开(公告)号：US07779669B2

公开(公告)日：2010-08-24

申请号：US12033633

申请日：2008-02-19

申请人： Reina Fukagai ,  Norikazu Ieda ,  Masahiro Tanaka ,  Hiroshi Inagaki ,  Masaki Hirata ,  Takahiro Suzuki

发明人： Reina Fukagai ,  Norikazu Ieda ,  Masahiro Tanaka ,  Hiroshi Inagaki ,  Masaki Hirata ,  Takahiro Suzuki

IPC分类号： G01N33/22 ,  G01M15/10

CPC分类号： F02D41/1495 ,  F02D41/1456 ,  F02D41/1474 ,  F02D41/1494 ,  F02D2041/1432

摘要： A gas sensor diagnostic method includes the steps of counting the reversal number of times that a target air-fuel ratio for an air-fuel mixture to be supplied to an internal combustion engine reverses from a rich side to a lean side or from the lean side to the rich side through a specific air-fuel ratio defined as a boundary of the rich and lean sides; obtaining a detection signal of a gas sensor at constant time intervals during a diagnosis period between a timing when the count for the reversal number is started and a timing when the reversal number reaches a predetermined number; calculating a moderated signal by applying a moderation calculation using a predetermined moderation coefficient to the obtained detection signal; calculating a deviation between the obtained detection signal and the calculated moderated signal; and determining whether the gas sensor is in an abnormal state or not on the basis of the deviation.

摘要翻译： 气体传感器诊断方法包括以下步骤：计算供给内燃机的空气燃料混合物的目标空燃比从富侧向稀侧反转的倾倒次数 通过定义为富边和贫边的边界的特定空燃比向富地提供; 在开始反转次数的定时与反转次数达到预定次数的定时之间的诊断期间，以恒定的时间间隔获取气体传感器的检测信号; 通过对所获得的检测信号应用使用预定调节系数的调节计算来计算调节信号; 计算所获得的检测信号与计算的调节信号之间的偏差; 并且基于偏差确定气体传感器是否处于异常状态。

公开(公告)号：US07636624B2

公开(公告)日：2009-12-22

申请号：US12033614

申请日：2008-02-19

申请人： Reina Fukagai ,  Norikazu Ieda ,  Masahiro Tanaka ,  Hiroshi Inagaki ,  Masaki Hirata ,  Takahiro Suzuki

发明人： Reina Fukagai ,  Norikazu Ieda ,  Masahiro Tanaka ,  Hiroshi Inagaki ,  Masaki Hirata ,  Takahiro Suzuki

IPC分类号： G06F19/00 ,  G01N27/404

CPC分类号： F02D41/1454 ,  F02D41/123 ,  F02D41/1495 ,  G01N27/4175

摘要： A gas sensor diagnostic method (or apparatus) is arranged to periodically obtain sensor output values of a gas sensor such as an oxygen sensor for an internal combustion engine, and to determine local extreme values from the sensor output values obtained during a period of interruption of fuel supply to the engine. Moreover, the local extreme values are compared with a first predetermined threshold level. When the number of the local extreme values reaches a predetermined first number, a diagnosis is performed to determine whether the gas sensor is in an improper condition or not, in accordance with results of the comparison of the local extreme values with the first threshold level.

摘要翻译： 气体传感器诊断方法（或装置）被布置成周期性地获得诸如用于内燃机的氧传感器的气体传感器的传感器输出值，并且从在中断期间获得的传感器输出值确定局部极值 向发动机供油。 此外，将局部极值与第一预定阈值水平进行比较。 当本地极值的数量达到预定的第一数量时，根据局部极值与第一阈值水平的比较结果，执行诊断以确定气体传感器是否处于不正确的状态。

公开(公告)号：US07596993B2

公开(公告)日：2009-10-06

申请号：US12283440

申请日：2008-09-12

申请人： Reina Fukagai ,  Norikazu Ieda ,  Masahiro Tanaka ,  Hiroshi Inagaki ,  Masaki Hirata ,  Takahiro Suzuki

发明人： Reina Fukagai ,  Norikazu Ieda ,  Masahiro Tanaka ,  Hiroshi Inagaki ,  Masaki Hirata ,  Takahiro Suzuki

IPC分类号： G01M15/04

CPC分类号： F02D41/1474 ,  F02D41/1456 ,  F02D41/1494 ,  F02D41/1495 ,  F02D2041/1432 ,  G01N27/4175

摘要： A gas sensor diagnostic method includes the steps of counting the reversal number of times that a target air-fuel ratio for an air-fuel mixture to be supplied to an internal combustion engine reverses from a rich side to a lean side or from the lean side to the rich side through a specific air-fuel ratio defined as a boundary of the rich and lean sides; obtaining a detection signal of gas sensor at constant time intervals during a diagnosis period between a timing when the count for the reversal number is started and a timing when the reversal number reaches a predetermined number; calculating a first moderated signal by applying a first moderation calculation to the detection signal, and a second moderated signal by applying a second moderation calculation to the detection signal; calculating a deviation between the first and second moderated signals; and determining whether the gas sensor is in the abnormal state on the basis of the deviation obtained during the diagnosis period.

摘要翻译： 气体传感器诊断方法包括以下步骤：计算供给内燃机的空气燃料混合物的目标空燃比从富侧向稀侧反转的倾倒次数 通过定义为富边和贫边的边界的特定空燃比向富地提供; 在开始反转次数的定时与反转次数达到预定次数的定时之间的诊断期间，以恒定的时间间隔获取气体传感器的检测信号; 通过对所述检测信号应用第一审核计算来计算第一调节信号，以及通过对所述检测信号应用第二审核计算来计算第二调节信号; 计算第一和第二调节信号之间的偏差; 并基于在诊断期间获得的偏差来确定气体传感器是否处于异常状态。

公开(公告)号：US20080196490A1

公开(公告)日：2008-08-21

申请号：US12033633

申请日：2008-02-19

申请人： Reina Fukagai ,  Norikazu Ieda ,  Masahiro Tanaka ,  Hiroshi Inagaki ,  Masaki Hirata ,  Takahiro Suzuki

发明人： Reina Fukagai ,  Norikazu Ieda ,  Masahiro Tanaka ,  Hiroshi Inagaki ,  Masaki Hirata ,  Takahiro Suzuki

IPC分类号： G01M15/04

CPC分类号： F02D41/1495 ,  F02D41/1456 ,  F02D41/1474 ,  F02D41/1494 ,  F02D2041/1432

摘要： A gas sensor diagnostic method includes the steps of counting the reversal number of times that a target air-fuel ratio for an air-fuel mixture to be supplied to an internal combustion engine reverses from a rich side to a lean side or from the lean side to the rich side through a specific air-fuel ratio defined as a boundary of the rich and lean sides; obtaining a detection signal of a gas sensor at constant time intervals during a diagnosis period between a timing when the count for the reversal number is started and a timing when the reversal number reaches a predetermined number; calculating a moderated signal by applying a moderation calculation using a predetermined moderation coefficient to the obtained detection signal; calculating a deviation between the obtained detection signal and the calculated moderated signal; and determining whether the gas sensor is in an abnormal state or not on the basis of the deviation.

摘要翻译： 气体传感器诊断方法包括以下步骤：计算供给内燃机的空气燃料混合物的目标空燃比从富侧向稀侧反转的倾倒次数 通过定义为富边和贫边的边界的特定空燃比向富地提供; 在开始反转次数的定时与反转次数达到预定次数的定时之间的诊断期间，以恒定的时间间隔获取气体传感器的检测信号; 通过对所获得的检测信号应用使用预定调节系数的调节计算来计算调节信号; 计算所获得的检测信号与计算的调节信号之间的偏差; 并且基于偏差确定气体传感器是否处于异常状态。

公开(公告)号：US20080196489A1

公开(公告)日：2008-08-21

申请号：US12033614

申请日：2008-02-19

申请人： Reina Fukagai ,  Norikazu Ieda ,  Masahiro Tanaka ,  Hiroshi Inagaki ,  Masaki Hirata ,  Takahiro Suzuki

发明人： Reina Fukagai ,  Norikazu Ieda ,  Masahiro Tanaka ,  Hiroshi Inagaki ,  Masaki Hirata ,  Takahiro Suzuki

IPC分类号： G01M15/04

CPC分类号： F02D41/1454 ,  F02D41/123 ,  F02D41/1495 ,  G01N27/4175

摘要： A gas sensor diagnostic method (or apparatus) is arranged to periodically obtain sensor output values of a gas sensor such as an oxygen sensor for an internal combustion engine, and to determine local extreme values from the sensor output values obtained during a period of interruption of fuel supply to the engine. Moreover, the local extreme values are compared with a first predetermined threshold level. When the number of the local extreme values reaches a predetermined first number, a diagnosis is performed to determine whether the gas sensor is in an improper condition or not, in accordance with results of the comparison of the local extreme values with the first threshold level.

摘要翻译： 气体传感器诊断方法（或装置）被布置成周期性地获得诸如用于内燃机的氧传感器的气体传感器的传感器输出值，并且从在中断期间获得的传感器输出值确定局部极值 向发动机供油。 此外，将局部极值与第一预定阈值水平进行比较。 当本地极值的数量达到预定的第一数量时，根据局部极值与第一阈值水平的比较结果，执行诊断以确定气体传感器是否处于不正确的状态。

公开(公告)号：US20090084172A1

公开(公告)日：2009-04-02

申请号：US12283440

申请日：2008-09-12

申请人： Reina Fukagai ,  Norikazu Ieda ,  Masahiro Tanaka ,  Hiroshi Inagaki ,  Masaki Hirata ,  Takahiro Suzuki

发明人： Reina Fukagai ,  Norikazu Ieda ,  Masahiro Tanaka ,  Hiroshi Inagaki ,  Masaki Hirata ,  Takahiro Suzuki

IPC分类号： G01M15/04

CPC分类号： F02D41/1474 ,  F02D41/1456 ,  F02D41/1494 ,  F02D41/1495 ,  F02D2041/1432 ,  G01N27/4175

摘要： A gas sensor diagnostic method includes the steps of counting the reversal number of times that a target air-fuel ratio for an air-fuel mixture to be supplied to an internal combustion engine reverses from a rich side to a lean side or from the lean side to the rich side through a specific air-fuel ratio defined as a boundary of the rich and lean sides; obtaining a detection signal of gas sensor at constant time intervals during a diagnosis period between a timing when the count for the reversal number is started and a timing when the reversal number reaches a predetermined number; calculating a first moderated signal by applying a first moderation calculation to the detection signal, and a second moderated signal by applying a second moderation calculation to the detection signal; calculating a deviation between the first and second moderated signals; and determining whether the gas sensor is in the abnormal state on the basis of the deviation obtained during the diagnosis period.

公开(公告)号：US20080196702A1

公开(公告)日：2008-08-21

申请号：US12033525

申请日：2008-02-19

申请人： Reina Fukagai ,  Norikazu Ieda ,  Masahiro Tanaka ,  Hiroshi Inagaki ,  Kunihiko Takamatsu ,  Masaki Hirata ,  Takahiro Suzuki

发明人： Reina Fukagai ,  Norikazu Ieda ,  Masahiro Tanaka ,  Hiroshi Inagaki ,  Kunihiko Takamatsu ,  Masaki Hirata ,  Takahiro Suzuki

IPC分类号： F02D41/22 ,  F02D35/00 ,  F01N11/00

CPC分类号： F02D41/1456 ,  F02D41/123 ,  F02D41/126 ,  F02D41/1495 ,  F02D2250/14 ,  G01N27/4175

摘要： A gas sensor diagnostic method includes: a fuel supply detecting step of detecting an interruption of a fuel supply to the internal combustion engine, and a restart of the fuel supply after the interruption of the fuel supply; a response time period accumulating step of determining a response time period by accumulating a first time period that the sensor output value reaches from a first threshold value to a second threshold value after the detection of the interruption of the fuel supply, and a second time period that the sensor output value reaches from a third threshold value to a fourth threshold value after the detection of the restart of the fuel supply after the interruption of the fuel supply; and an abnormal state diagnosing section of determining an abnormal state of the gas sensor when the response time period is greater than a predetermined time period.

摘要翻译： 一种气体传感器诊断方法，包括：燃料供给检测步骤，检测对内燃机的燃料供给的中断，以及在燃料供给中断之后重新启动燃料供给; 响应时间累积步骤，通过在检测到燃料供给中断之后，将传感器输出值从第一阈值到达第一阈值的第一时间段确定为响应时间段，以及第二时间段 在燃料供应中断之后检测到燃料供应的重新启动之后，传感器输出值从第三阈值到达第四阈值; 以及异常状态诊断部，其在所述响应时间段大于预定时间段时确定所述气体传感器的异常状态。