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21. 发明申请

US20100318260A1 ABNORMALITY DETECTION APPARATUS AND ABNORMALITY DETECTION METHOD FOR AIR/FUEL RATIO SENSOR 有权
标题翻译：空气/燃料比传感器的异常检测装置和异常检测方法
公开(公告)号：US20100318260A1
公开(公告)日：2010-12-16
申请号：US12775872
申请日：2010-05-07
申请人： Takeo Ogiso , Keiko Okamoto , Yuya Yoshikawa , Hiroaki Tsuji
发明人： Takeo Ogiso , Keiko Okamoto , Yuya Yoshikawa , Hiroaki Tsuji
IPC分类号： G01M17/00
CPC分类号： G01M15/104
摘要： An abnormality detection apparatus includes: an air/fuel ratio control portion that controls of fluctuating the air/fuel ratio; a data acquisition portion that acquires a responsiveness parameter during change of output of the sensor between rich and lean peaks; and a abnormality determination portion that when the number of acquisitions reaches or exceeds a first set number, the presence/absence of sensor abnormality based on the average value and the criterion-value is determined, if the average value is not in a pending region; however, if the average value is in the pending region, the data acquisition is performed until the number of acquisitions performed during a large-amount-of-intake-air state of the engine reaches a second set number, and the presence/absence of sensor abnormality based on the average value of the data acquired by the second set number of acquisitions and the criterion-value is determined.
摘要翻译：异常检测装置包括：空气/燃料比控制部，其控制空燃比的波动; 数据采集部，其在丰富峰和所述贫峰之间的所述传感器的输出变化期间获取响应性参数; 以及异常判定部，当获取次数达到或超过第一设定数时，如果平均值不在未决区域，则确定基于平均值和标准值的传感器异常的存在/不存在; 然而，如果平均值处于未决区域，则执行数据采集，直到在发动机的大量进气 - 空气状态期间执行的获取次数达到第二设定数，并且存在/不存在确定基于由第二设定采集次数获得的数据的平均值和标准值的传感器异常。

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