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    • 34. 发明授权
    • Failure diagnosis apparatus for exhaust pressure sensor
    • 排气压力传感器故障诊断装置
    • US08190397B2
    • 2012-05-29
    • US12566257
    • 2009-09-24
    • Yoshiki Kurokawa
    • Yoshiki Kurokawa
    • G06F11/30
    • F02D41/222F01N2550/00F01N2560/08F02D41/0055F02D41/1448F02D2200/703F02M26/05F02M26/47F02M26/49Y02T10/40
    • A failure diagnosis apparatus for an exhaust pressure sensor for detecting the exhaust pressure in an exhaust gas recirculation passage which connects an exhaust passage and an intake passage of an internal combustion engine. A first preliminary determination that the exhaust pressure sensor is normal, is made when the engine is in a predetermined low load operating condition and a difference between the detected exhaust pressure and the atmospheric pressure is equal to or less than a first determination threshold value. A second preliminary determination that the exhaust pressure sensor is normal, is made when the engine is in a predetermined high load operating condition and the difference between the exhaust pressure detected by the exhaust pressure sensor and the atmospheric pressure is equal to or greater than a second determination threshold value. A final determination that the exhaust pressure sensor is normal, is made when both of the first and second preliminary determinations are made.
    • 一种用于检测连接内燃机的排气通道和进气通道的排气再循环通道中的排气压力的排气压力传感器故障诊断装置。 当发动机处于预定的低负荷运行状态并且检测到的排气压力和大气压力之间的差值等于或小于第一确定阈值时,进行排气压力传感器正常的第一初步判定。 当发动机处于预定的高负荷运行状态并且由排气压力传感器检测到的排气压力与大气压之间的差异等于或大于第二个时,进行排气压力传感器正常的第二初步判定 确定阈值。 排气压力传感器正常的最终确定是在进行第一和第二初步测定时进行的。