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    • 19. 发明申请
    • Air bypass valve failure detection device in supercharging device for engine
    • 发动机增压装置中的旁通阀故障检测装置
    • US20080022968A1
    • 2008-01-31
    • US11878117
    • 2007-07-20
    • Atsuhiro MiyauchiHirofumi HaraKazuhiko ImamuraYoshinori Andou
    • Atsuhiro MiyauchiHirofumi HaraKazuhiko ImamuraYoshinori Andou
    • F02D41/00
    • F02D41/221F02B37/16F02D41/0007F02D2200/0406Y02T10/144
    • An air bypass valve failure detecting device outputs an opening command to an air bypass valve when a throttle valve suddenly closes, thereby prevent surging from occurring in a second intake passage between a turbocharger and a throttle valve. When the opening command is outputted to the air bypass valve, failure detection for the air bypass valve is permitted only if an intake air quantity of an engine immediately before a closing command is changed to the opening command is equal to or larger than a predetermined value. Thus, it is possible to prevent the failure detecting device from erroneously determining that the air bypass valve is normal although valve closing failure of the air bypass valve has occurred. This is because, when the intake air quantity is smaller than the predetermined value, surging does not occur in the second intake passage even if the valve closing failure of the airy bypass valve has occurred.
    • 当节气门突然闭合时,空气旁通阀故障检测装置向空气旁通阀输出打开命令,从而防止在涡轮增压器和节流阀之间的第二进气通道中发生喘振。 当打开命令被输出到空气旁通阀时,只有紧接关闭命令之前的发动机的进气量改变为打开命令,才允许空气旁通阀的故障检测等于或大于预定值 。 因此,尽管发生了空气旁通阀的关闭故障,但是可以防止故障检测装置错误地确定空气旁通阀是正常的。 这是因为,当进气量小于预定值时,即使发生通风旁通阀的关闭故障,也不会在第二进气通道中产生喘振。