公开(公告)号：US06957563B2

公开(公告)日：2005-10-25

申请号：US10857957

申请日：2004-06-02

申请人： Kazutaka Hattori

发明人： Kazutaka Hattori

IPC分类号： F01N13/00 ,  F01N99/00 ,  F02D41/04 ,  F02D41/14 ,  F02D41/22 ,  F02D45/00 ,  G01M99/00 ,  G01N7/00 ,  G01N21/00 ,  G01N27/417 ,  G01N33/496

CPC分类号： G01N27/4175 ,  F02D41/042 ,  F02D41/1495 ,  F02D41/1496

摘要： A novel abnormality detection device for an air-fuel ratio sensor able to more accurately detect an abnormality, provided with an air-fuel ratio sensor arranged in an exhaust passage of an internal combustion engine for detecting an air-fuel ratio based on a current generated in accordance with a concentration of oxygen in the exhaust gas along with application of voltage and an air-fuel ratio sensor activating means for activating the air-fuel ratio sensor, wherein the activity of the air-fuel ratio sensor is maintained even after the internal combustion engine is stopped and an abnormality of the air-fuel ratio sensor is detected based on an output of the air-fuel ratio sensor upon and/or after the elapse of a first predetermined time after the internal combustion engine is stopped.

摘要翻译： 一种用于能够更准确地检测异常的空燃比传感器的新型异常检测装置，其具有布置在内燃机的排气通道中的空燃比传感器，用于基于产生的电流检测空燃比 根据排气中的氧浓度以及施加电压，以及用于启动空燃比传感器的空燃比传感器启动装置，其中空燃比传感器的活动即使在内部 在内燃机停止之后的第一预定时间过去和/或之后，基于空燃比传感器的输出来检测内燃机停止并且检测到空燃比传感器的异常。

公开(公告)号：US06818120B2

公开(公告)日：2004-11-16

申请号：US09995677

申请日：2001-11-29

申请人： Masaki Nakamichi ,  Ryoichi Hanazaki

发明人： Masaki Nakamichi ,  Ryoichi Hanazaki

IPC分类号： G01N27407

CPC分类号： F02D41/1496 ,  F02D41/1454 ,  F02D41/1474 ,  F02D41/1476 ,  F02D41/148 ,  F02D41/1495 ,  F02D41/187 ,  F02D41/222 ,  F02D2041/228 ,  G01N27/4175 ,  G01N33/007

摘要： An O2-sensor fault diagnosis apparatus and method therefor, which are capable of detecting wire breaking of an O2-sensor with reliability and successively performing fault diagnosis with minimal effect on an exhaust gas. An O2-sensor 19 detects concentration of oxygen contained in an exhaust gas of an engine 1. An ECU 20 controls a quantity of fuel supplied to the engine 1 through feedback control according to an output signal of the O2-sensor. A fault diagnosis portion changes an input resistance value of an input circuit that is connected to the O2-sensor 19 and constitutes the ECU 20 each time a control condition for determining that the O2-sensor 19 is in an inactive state is satisfied, determines that wire breaking occurs in the O2-sensor 19 only if the output voltage of the O2-sensor 19 exceeds a predetermined voltage, and activates an informing portion to send a notice showing that there is a fault in the O2-sensor 19.

摘要翻译： 一种O2传感器故障诊断装置及其方法，其能够可靠地检测O2传感器的断线，并且连续执行故障诊断，对排气的影响最小。 O2传感器19检测发动机1的排气中所含的氧的浓度。ECU20通过根据O2传感器的输出信号的反馈控制来控制供给发动机1的燃料量。 每当满足用于确定O2传感器19处于非活动状态的控制条件时，故障诊断部分改变连接到O 2传感器19并构成ECU 20的输入电路的输入电阻值，确定 只有在O2传感器19的输出电压超过预定电压的情况下，O2传感器19才发生断线，并且激活通知部分发送表示O2传感器19中存在故障的通知。

公开(公告)号：US20040095153A1

公开(公告)日：2004-05-20

申请号：US10294380

申请日：2002-11-14

发明人： Kevin M. Gertiser ,  James A. Kinley ,  Ashraf K. Kamel ,  Gregory J. Manlove

IPC分类号： G01R027/08

CPC分类号： F02D41/1441 ,  F02D41/1479 ,  F02D41/1495 ,  F02D41/1496 ,  F02D41/2474 ,  F02D2041/2075 ,  F02D2041/2089 ,  F02D2041/2093 ,  F02D2200/503

摘要： An oxygen sensor interface circuit is configurable on the fly by an electronic controller such as an engine controller to support oxygen sensors having unique interface requirements, to reliably identify various oxygen sensor faults, and to enable rapid detection of a warmed up sensor. The interface circuit is configurable in a first respect to enable operation with any of a number of different sensors, and in a second respect to enable more reliable fault detection, including measurement of leakage to ground or battery.

公开(公告)号：US06578563B2

公开(公告)日：2003-06-17

申请号：US10202865

申请日：2002-07-26

申请人： Satoshi Hada ,  Eiichi Kurokawa

发明人： Satoshi Hada ,  Eiichi Kurokawa

IPC分类号： F02D4100

CPC分类号： F02D41/1496 ,  F02D41/1494 ,  F02D2041/1409 ,  F02D2041/1422 ,  F02D2041/2027 ,  G01N27/4067

摘要： A heater power supply control system is provided for controlling the temperature of a heater used to heat a solid electrolyte-made sensor element of a gas concentration sensor up to a desired activation temperature. The heater power supply control system measures a resistance value of the sensor element and controls an electric power supply to the heater using a PI control function. The heater power supply control system works to limit the value of an integral term of the PI control function in the course of activation of the sensor element, thereby avoiding overshoot of the resistance value of the sensor element, which avoids thermal damage of the sensor element.

公开(公告)号：US06571602B2

公开(公告)日：2003-06-03

申请号：US09879996

申请日：2001-06-14

申请人： Shigeo Ohkuma

发明人： Shigeo Ohkuma

IPC分类号： G01N33497

CPC分类号： F02D41/1496 ,  F01N11/005 ,  F02D41/1441 ,  F02D2200/0804 ,  G01K7/42 ,  Y02T10/47

摘要： The present invention is to detect a temperature of an exhaust gas purification catalyst in order to determined an air-fuel ratio feedback control start time of an internal combustion engine, wherein the temperature of the exhaust gas purification catalyst is detected by estimation and computation based on an element impedance of an air-fuel ratio sensor.

公开(公告)号：US20030089358A1

公开(公告)日：2003-05-15

申请号：US10290250

申请日：2002-11-08

申请人： HITACHI UNISIA AUTOMOTIVE, LTD.

发明人： Shigeo Ohkuma ,  Futoshi Ichiyanagi

IPC分类号： F02D041/14

CPC分类号： F02D41/1486 ,  F02D41/1456 ,  F02D41/1496

摘要： A temperature of an oxygen concentration detector generating an electromotive force according to a difference between oxygen concentration in an engine exhaust gas and oxygen concentration in the atmosphere, is detected, and coefficients in a transformation for converting the electromotive force to a value having a characteristic linear to an air-fuel ratio is modified according to the temperature.

摘要翻译： 检测根据发动机排气中的氧浓度与大气中的氧浓度之间的差产生电动势的氧浓度检测器的温度，将电动势变换为具有特征线性的值的变换中的系数 空燃比根据温度而变化。

公开(公告)号：US20030049176A1

公开(公告)日：2003-03-13

申请号：US10234247

申请日：2002-09-05

申请人： HONDA GIKEN KOGYO KABUSHIKI KAISHA

发明人： Masahiro Sato ,  Takashi Haga ,  Norihito Watanabe ,  Kenji Abe ,  Tetsuo Endo

IPC分类号： G01N029/02 ,  B32B027/12 ,  B32B005/02

CPC分类号： F01N3/0835 ,  F01N3/0814 ,  F01N3/0878 ,  F01N3/101 ,  F01N11/00 ,  F01N11/002 ,  F01N13/009 ,  F01N13/0093 ,  F01N13/0097 ,  F01N2550/03 ,  F01N2560/028 ,  F02D41/0275 ,  F02D41/1446 ,  F02D41/1495 ,  F02D41/1496 ,  F02D2200/0418 ,  Y02T10/22 ,  Y02T10/47

摘要： An adsorbent deterioration determining apparatus can accurately determine a deterioration of an adsorbent in a relatively simple configuration. The adsorbent deterioration determining apparatus determines a deterioration of an adsorbent arranged in an exhaust system of an internal combustion engine for purifying exhaust gases. The adsorbent is capable of adsorbing hydrocarbons and moisture in exhaust gases. The adsorbent deterioration determining apparatus comprises a humidity sensor arranged at a location downstream of the adsorbent in the exhaust system for detecting the humidity of exhaust gases, and an ECU for determining a deterioration of the adsorbent in accordance with a detected output of the humidity sensor at the time a predetermined time has elapsed from a start of the internal combustion engine.

摘要翻译： 吸附剂劣化判定装置能够以比较简单的结构精确地确定吸附剂的劣化。 吸附剂劣化判定装置判定配置在用于净化废气的内燃机的排气系统中的吸附剂的劣化。 吸附剂能够吸附废气中的碳氢化合物和水分。 吸附剂劣化判定装置包括布置在排气系统中用于检测废气湿度的吸附剂下游位置的湿度传感器，以及用于根据湿度传感器的检测输出来确定吸附剂的劣化的ECU 从内燃机开始经过预定时间的时间。

公开(公告)号：US20020175086A1

公开(公告)日：2002-11-28

申请号：US09995677

申请日：2001-11-29

申请人： MITSUBISHI DENKI KABUSHIKI KAISHA

发明人： Masaki Nakamichi ,  Ryoichi Hanazaki

IPC分类号： G01N027/407

CPC分类号： F02D41/1496 ,  F02D41/1454 ,  F02D41/1474 ,  F02D41/1476 ,  F02D41/148 ,  F02D41/1495 ,  F02D41/187 ,  F02D41/222 ,  F02D2041/228 ,  G01N27/4175 ,  G01N33/007

摘要： An O2-sensor fault diagnosis apparatus and method therefor, which are capable of detecting wire breaking of an O2-sensor with reliability and successively performing fault diagnosis with minimal effect on an exhaust gas. An O2-sensor 19 detects concentration of oxygen contained in an exhaust gas of an engine 1. An ECU 20 controls a quantity of fuel supplied to the engine 1 through feedback control according to an output signal of the O2-sensor. A fault diagnosis portion changes an input resistance value of an input circuit that is connected to the O2-sensor 19 and constitutes the ECU 20 each time a control condition for determining that the O2-sensor 19 is in an inactive state is satisfied, determines that wire breaking occurs in the O2-sensor 19 only if the output voltage of the O2-sensor 19 exceeds a predetermined voltage, and activates an informing portion to send a notice showing that there is a fault in the O2-sensor 19.

摘要翻译： 一种O2传感器故障诊断装置及其方法，其能够可靠地检测O2传感器的断线，并且连续执行故障诊断，对排气的影响最小。 O2传感器19检测发动机1的排气中所含的氧的浓度。ECU20通过根据O2传感器的输出信号的反馈控制来控制供给发动机1的燃料量。 每当满足用于确定O2传感器19处于非活动状态的控制条件时，故障诊断部分改变连接到O 2传感器19并构成ECU 20的输入电路的输入电阻值，确定 只有在O2传感器19的输出电压超过预定电压的情况下，O2传感器19才发生断线，并且激活通知部分发送表示O2传感器19中存在故障的通知。

公开(公告)号：US06382015B1

公开(公告)日：2002-05-07

申请号：US09290039

申请日：1999-04-12

申请人： Keiichiro Aoki

发明人： Keiichiro Aoki

IPC分类号： G01N33497

CPC分类号： G01N27/4067 ,  F02D41/1456 ,  F02D41/1496 ,  F02D41/2441 ,  F02D41/2451 ,  F02D41/2454 ,  F02D41/2474

摘要： An apparatus for detecting a resistance of an air-fuel ratio sensor has an air-fuel ratio sensor element, a heater for activating the sensor element, an air-fuel ratio detecting device for detecting an air-fuel ratio in a detection object gas detected by the sensor element, a gas condition detecting device for detecting a gas detection of the detection-object gas, a device for detecting an impedance of the sensor element and a device for correcting the impedance of the sensor element in accordance with the gas condition. A cumulative amount of electric power supplied to the heater during a predetermined period of time is calculated. Based on the calculated cumulative amount of electric power, the impedance of the sensor element is corrected. In accordance with the cumulative amount of electric power supplied to the heater, it is determined whether the sensor element has a failure and an element temperature control target learned value is determined. A target impedance is calculated by correcting the learned value in accordance with the gas condition. Based on the calculated target value, the heater is controlled to prevent overheating of the sensor element and the heater.

摘要翻译： 用于检测空燃比传感器的电阻的装置具有空燃比传感器元件，用于启动传感器元件的加热器，用于检测检测到的检测对象气体中的空燃比的空燃比检测装置 通过传感器元件，用于检测检测对象气体的气体检测的气体状况检测装置，用于检测传感器元件的阻抗的装置和根据气体条件校正传感器元件的阻抗的装置。 计算在预定时间段期间提供给加热器的累积电力量。 基于计算的累积电力量，校正传感器元件的阻抗。 根据供给到加热器的累积电力量，确定传感器元件是否有故障，并且确定元件温度控制目标学习值。 通过根据气体条件校正学习值来计算目标阻抗。 基于计算出的目标值，控制加热器以防止传感器元件和加热器过热。

公开(公告)号：US6084418A

公开(公告)日：2000-07-04

申请号：US38005

申请日：1998-03-11

申请人： Masayuki Takami ,  Tomomichi Mizoguchi ,  Satoshi Haseda ,  Kazuhiro Okazaki ,  Koji Jono

发明人： Masayuki Takami ,  Tomomichi Mizoguchi ,  Satoshi Haseda ,  Kazuhiro Okazaki ,  Koji Jono

IPC分类号： F02D41/14 ,  G01N27/406 ,  G01N33/00 ,  G01N27/04 ,  G01N27/419 ,  G01R27/08 ,  G01R27/22

CPC分类号： G01N27/4067 ,  F02D41/1494 ,  F02D41/1496 ,  F02D41/1456

摘要： An air-fuel ratio sensor generates linear air-fuel ratio detection signals proportional to concentration of oxygen in exhaust gas from an engine in response to a command voltage from a microprocessor. A bias command signal generated by the microprocessor is provided to a D/A converter which converts it to an analog signal. Thereafter, the signal is provided to an LPF for removing the high frequency components of the analog signal. Output voltage of the LPF is provided to a bias control circuit. A single AC signal which has a predetermined frequency and which is provided with a predetermined time constant (about 159 .mu.s) by the LPF is applied to the air-fuel ratio sensor. Element resistance of the air-fuel ratio sensor is detected based on the voltage of the AC signal and the change in the current level of the air-fuel ratio sensor caused by the application of the AC signal.

摘要翻译： 空燃比传感器响应于来自微处理器的命令电压产生与来自发动机的废气中的氧浓度成比例的线性空燃比检测信号。 由微处理器产生的偏置指令信号被提供给将其转换为模拟信号的D / A转换器。 此后，将信号提供给LPF，以去除模拟信号的高频分量。 LPF的输出电压被提供给偏置控制电路。 具有预定频率并且由LPF提供预定时间常数（约159μs）的单个AC信号被施加到空燃比传感器。 基于交流信号的电压和由于施加交流信号引起的空燃比传感器的当前电平的变化来检测空燃比传感器的元件电阻。