公开(公告)号：US20050204805A1

公开(公告)日：2005-09-22

申请号：US11050828

申请日：2005-01-27

申请人： Keiji Wakahara ,  Hirofumi Shoda

发明人： Keiji Wakahara ,  Hirofumi Shoda

IPC分类号： F01L1/34 ,  F01L13/00 ,  F02D13/02 ,  F02D41/00 ,  F02D41/22 ,  F02D41/34 ,  G01M15/09 ,  G01M99/00 ,  G01M19/00

CPC分类号： F02D13/0207 ,  F01L1/34 ,  F01L13/0015 ,  F01L2800/00 ,  F01L2800/12 ,  F02D13/0226 ,  F02D41/0082 ,  F02D41/1454 ,  F02D41/1458 ,  F02D41/221 ,  F02D2041/001 ,  F02D2041/1416 ,  F02D2041/1417 ,  G01M15/09 ,  Y02T10/18

摘要： ECU calculates variations of air-fuel ratios of respective cylinders and variations of air-fuel ratios of all the cylinders in variable intake valve lift devices of two cylinder groups. Presence and absence of an abnormality is determined on the basis of whether ratios of variations of air-fuel ratios of respective cylinders to variations of air-fuel ratios of all the cylinders are less than an abnormality threshold. Whether which of variable intake valve lift devices of the cylinder groups is abnormal is determined from control modes of the variable intake valve lift devices of the respective cylinder groups, and the relationship between that cylinder group, to which a cylinder being maximum in air-fuel ratio belongs, and cylinder group, to which a cylinder being minimum in air-fuel ratio belongs.

摘要翻译： ECU计算两个气缸组的可变进气门提升装置中各气缸的空燃比变化和所有气缸的空燃比变化。 基于各气缸的空燃比的变化率与所有气缸的空燃比的变化率是否小于异常阈值来确定是否存在异常。 气缸组的可变进气门提升装置中的哪一个是不正常的，由各气缸组的可变进气门提升装置的控制模式以及气缸组之间的关系，气缸组在空气燃料 比例属于，空气燃料比最小的气缸组属于气缸组。

公开(公告)号：US07146851B2

公开(公告)日：2006-12-12

申请号：US11050828

申请日：2005-01-27

申请人： Keiji Wakahara ,  Hirofumi Shoda

发明人： Keiji Wakahara ,  Hirofumi Shoda

IPC分类号： G01M15/00

CPC分类号： F02D13/0207 ,  F01L1/34 ,  F01L13/0015 ,  F01L2800/00 ,  F01L2800/12 ,  F02D13/0226 ,  F02D41/0082 ,  F02D41/1454 ,  F02D41/1458 ,  F02D41/221 ,  F02D2041/001 ,  F02D2041/1416 ,  F02D2041/1417 ,  G01M15/09 ,  Y02T10/18

摘要： ECU calculates variations of air-fuel ratios of respective cylinders and variations of air-fuel ratios of all the cylinders in variable intake valve lift devices of two cylinder groups. Presence and absence of an abnormality is determined on the basis of whether ratios of variations of air-fuel ratios of respective cylinders to variations of air-fuel ratios of all the cylinders are less than an abnormality threshold. Whether which of variable intake valve lift devices of the cylinder groups is abnormal is determined from control modes of the variable intake valve lift devices of the respective cylinder groups, and the relationship between that cylinder group, to which a cylinder being maximum in air-fuel ratio belongs, and cylinder group, to which a cylinder being minimum in air-fuel ratio belongs.

摘要翻译： ECU计算两个气缸组的可变进气门提升装置中各气缸的空燃比变化和所有气缸的空燃比变化。 基于各气缸的空燃比的变化率与所有气缸的空燃比的变化率是否小于异常阈值来确定是否存在异常。 气缸组的可变进气门提升装置中的哪一个是不正常的，由各气缸组的可变进气门提升装置的控制模式以及气缸组之间的关系，气缸组在空气燃料 比例属于，空气燃料比最小的气缸组属于气缸组。

公开(公告)号：US07954364B2

公开(公告)日：2011-06-07

申请号：US12365302

申请日：2009-02-04

申请人： Hirofumi Shoda

发明人： Hirofumi Shoda

IPC分类号： G01M15/10

CPC分类号： G01M15/102

摘要： A malfunction diagnosis apparatus diagnoses a malfunction of an exhaust gas sensor provided on a downstream side of a catalyst. A dead time determination unit determines a dead time between a first time point, at which fuel cut of the internal combustion engine is started, and a second time point, at which the fuel cut starts exerting effect on an output of the exhaust gas sensor. An output change time measurement unit measures an output change time between the first time point and a third time point, at which the output of the exhaust gas sensor changes to a leaner side than a threshold. A malfunction determination unit determines whether a malfunction is caused in the exhaust gas sensor on the basis of a response time of the exhaust gas sensor obtained by subtracting the dead time from the output change time.

摘要翻译： 故障诊断装置诊断设置在催化剂下游侧的废气传感器的故障。 死区时间确定单元确定在内燃机的燃料切断开始的第一时间点和燃料切断开始对排气传感器的输出施加效果的第二时间点之间的死区时间。 输出改变时间测量单元测量在第一时间点和第三时间点之间的输出改变时间，在该时间点，排气传感器的输出变为比阈值更稀的侧。 故障确定单元基于通过从输出改变时间减去死区时间而获得的排气传感器的响应时间来确定是否在排气传感器中引起故障。

公开(公告)号：US20090229355A1

公开(公告)日：2009-09-17

申请号：US12365302

申请日：2009-02-04

申请人： Hirofumi Shoda

发明人： Hirofumi Shoda

IPC分类号： G01M15/10

CPC分类号： G01M15/102

摘要： A malfunction diagnosis apparatus diagnoses a malfunction of an exhaust gas sensor provided on a downstream side of a catalyst. A dead time determination unit determines a dead time between a first time point, at which fuel cut of the internal combustion engine is started, and a second time point, at which the fuel cut starts exerting effect on an output of the exhaust gas sensor. An output change time measurement unit measures an output change time between the first time point and a third time point, at which the output of the exhaust gas sensor changes to a leaner side than a threshold. A malfunction determination unit determines whether a malfunction is caused in the exhaust gas sensor on the basis of a response time of the exhaust gas sensor obtained by subtracting the dead time from the output change time.

摘要翻译： 故障诊断装置诊断设置在催化剂下游侧的废气传感器的故障。 死区时间确定单元确定在内燃机的燃料切断开始的第一时间点和燃料切断开始对排气传感器的输出施加效果的第二时间点之间的死区时间。 输出改变时间测量单元测量在第一时间点和第三时间点之间的输出改变时间，在该时间点，排气传感器的输出变为比阈值更稀的侧。 故障确定单元基于通过从输出改变时间减去死区时间而获得的排气传感器的响应时间来确定是否在排气传感器中引起故障。