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    • 3. 发明授权
    • Abnormality detection apparatus and abnormality detection method for air/fuel ratio sensor
    • 空气/燃料比传感器异常检测装置和异常检测方法
    • US08485167B2
    • 2013-07-16
    • US12785816
    • 2010-05-24
    • Takeo OgisoHiroaki TsujiYuya YoshikawaKeiko Okamoto
    • Takeo OgisoHiroaki TsujiYuya YoshikawaKeiko Okamoto
    • F02D41/00
    • F02D41/222F02D41/1495Y02T10/40
    • An abnormality detection apparatus includes: an air/fuel ratio control portion that performs a control of fluctuating the air/fuel ratio between rich and lean states; a data acquisition portion that acquires, as data for detecting abnormality, a parameter that corresponds to responsiveness during change of output of the A/F sensor between rich and lean peaks during the control; a straight line setting portion that sets a straight line that represents a tendency of change of the parameter relative to change in intake air amount of the engine based on the data acquired by performing acquisition of the data a plurality of times; and an abnormality determination portion that determines the presence/absence of abnormality of the A/F sensor based on comparison between the gradient of the set straight line and an abnormality criterion value.
    • 一种异常检测装置,包括:空燃比控制部,其对丰富状态和稀薄状态之间的空燃比进行波动控制; 数据获取部,其作为用于检测异常的数据,在所述控制期间获取与所述A / F传感器在丰富峰和所述贫峰之间的输出变化期间的响应性相对应的参数; 基于通过多次获取数据而获取的数据,设定表示参数相对于发动机的进气量的变化的变化趋势的直线的直线设定部; 以及异常判定部,其基于所设定的直线的斜率与异常判别值的比较来判定A / F传感器的异常的有无。
    • 6. 发明申请
    • ABNORMALITY DETECTION APPARATUS AND ABNORMALITY DETECTION METHOD FOR AIR/FUEL RATIO SENSOR
    • 空气/燃料比传感器的异常检测装置和异常检测方法
    • US20100318260A1
    • 2010-12-16
    • US12775872
    • 2010-05-07
    • Takeo OgisoKeiko OkamotoYuya YoshikawaHiroaki Tsuji
    • Takeo OgisoKeiko OkamotoYuya YoshikawaHiroaki Tsuji
    • G01M17/00
    • G01M15/104
    • 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.
    • 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。
    • 10. 发明授权
    • Abnormality detection apparatus and abnormality detection method for air/fuel ratio sensor
    • 空气/燃料比传感器异常检测装置和异常检测方法
    • US08245569B2
    • 2012-08-21
    • US12775872
    • 2010-05-07
    • Takeo OgisoKeiko OkamotoYuya YoshikawaHiroaki Tsuji
    • Takeo OgisoKeiko OkamotoYuya YoshikawaHiroaki Tsuji
    • G01M15/04
    • G01M15/104
    • 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.
    • 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。