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1. 发明申请

US20090241925A1 Air/Fuel Imbalance Monitor Using an Oxygen Sensor 有权
标题翻译：使用氧传感器的空气/燃料不平衡监测器
公开(公告)号：US20090241925A1
公开(公告)日：2009-10-01
申请号：US12055111
申请日：2008-03-25
申请人： Ken John Behr , Has R. Patel , Michael Igor Kluzner , Bob Roy Jentz
发明人： Ken John Behr , Has R. Patel , Michael Igor Kluzner , Bob Roy Jentz
IPC分类号： F02D41/00
CPC分类号： F02D41/0082 , F02D41/0085 , F02D41/1443 , F02D41/1456 , F02D41/187
摘要： Air/fuel imbalance monitoring systems and methods for monitoring air/fuel ratio imbalance of an internal combustion engine having a plurality of engine cylinders are provided herein. An example of the method may include routing exhaust gas from a first group of cylinders to an exhaust gas oxygen sensor, and during selected operating conditions, indicating that air/fuel of at least one cylinder in the first group is imbalanced based on a response of the exhaust gas oxygen sensor at frequencies at or above firing frequency of the cylinders in the first group. An example of the system may include an exhaust gas oxygen sensor positioned in such a way that exhaust gas from the group of engine cylinders are routed to the exhaust gas oxygen sensor, and a controller configured to during selected operating conditions, indicate that air/fuel of at least one cylinder in the group is imbalanced based on a response of the exhaust gas oxygen sensor at frequencies at or above firing frequency of the cylinders in the group.
摘要翻译：本文提供了用于监测具有多个发动机气缸的内燃机的空气/燃料不平衡监测系统和用于监测空/燃比不平衡的方法。该方法的示例可以包括将废气从第一组气缸排向排气氧传感器，并且在选定的操作条件期间，指示第一组中的至少一个气缸的空气/燃料基于排气氧传感器在第一组中的气缸的点火频率以上的频率。系统的示例可以包括排气氧传感器，其被定位成使得来自一组发动机气缸的排气被引导到排气氧传感器，并且配置成在选择的操作条件期间的控制器指示空气/燃料该组中的至少一个气缸基于排气氧传感器在组中的气缸的点火频率以上的频率的响应而不平衡。

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