公开(公告)号：US20100186491A1

公开(公告)日：2010-07-29

申请号：US12666238

申请日：2008-06-19

申请人： Daisuke Shibata ,  Hiroshi Sawada ,  Yasuyuki Yokokawa

发明人： Daisuke Shibata ,  Hiroshi Sawada ,  Yasuyuki Yokokawa

IPC分类号： G01M15/10

CPC分类号： F02D41/221 ,  F02D41/1495 ,  F02D41/1498 ,  F02D2041/1431 ,  F02D2041/228 ,  Y02T10/40

摘要： An abnormality diagnosis device according to the present invention can calculate a calculation air-fuel ratio A/Fk based upon a fuel injection quantity and an intake air quantity, and determine the abnormality of the air-fuel ratio sensor based upon the calculation air-fuel ratio and an actual air-fuel ratio detected by an air-fuel ratio sensor, when an operating condition in the internal combustion engine relatively rapidly changes according to an engine operating demand and thereby the calculation air-fuel ratio relatively rapidly changes. Since the air-fuel ratio is not forcibly changed and fluctuated, deterioration of the exhaust emission and the combustion state, and deterioration of the vibration and the noise at abnormality diagnosing can be certainly prevented.

摘要翻译： 根据本发明的异常诊断装置可以基于燃料喷射量和进气量计算计算空燃比A / Fk，并且基于计算空气燃料来确定空燃比传感器的异常 当内燃机的运转状态相对快速地根据发动机运转要求而变化时，空燃比传感器检测出的实际空燃比相对快速变化。 由于空燃比没有强制变化和波动，所以可以可靠地防止排气排放和燃烧状态的劣化，异常诊断时的振动和噪声的劣化。

公开(公告)号：US08234916B2

公开(公告)日：2012-08-07

申请号：US12666238

申请日：2008-06-19

申请人： Daisuke Shibata ,  Hiroshi Sawada ,  Yasuyuki Yokokawa

发明人： Daisuke Shibata ,  Hiroshi Sawada ,  Yasuyuki Yokokawa

IPC分类号： G01M15/04

CPC分类号： F02D41/221 ,  F02D41/1495 ,  F02D41/1498 ,  F02D2041/1431 ,  F02D2041/228 ,  Y02T10/40

摘要： An abnormality diagnosis device according to the present invention can calculate a calculation air-fuel ratio A/Fk based upon a fuel injection quantity and an intake air quantity, and determine the abnormality of the air-fuel ratio sensor based upon the calculation air-fuel ratio and an actual air-fuel ratio detected by an air-fuel ratio sensor, when an operating condition in the internal combustion engine relatively rapidly changes according to an engine operating demand and thereby the calculation air-fuel ratio relatively rapidly changes. Since the air-fuel ratio is not forcibly changed and fluctuated, deterioration of the exhaust emission and the combustion state, and deterioration of the vibration and the noise at abnormality diagnosing can be certainly prevented.

摘要翻译： 根据本发明的异常诊断装置可以基于燃料喷射量和进气量计算计算空燃比A / Fk，并且基于计算空气燃料来确定空燃比传感器的异常 当内燃机的运转状态相对快速地根据发动机运转要求而变化时，空燃比传感器检测出的实际空燃比相对快速变化。 由于空燃比没有强制变化和波动，所以可以可靠地防止排气排放和燃烧状态的劣化，异常诊断时的振动和噪声的劣化。