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    • 5. 发明公开
    • INTERNAL COMBUSTION ENGINE CONTROL APPARATUS
    • 内燃机控制装置
    • EP2685071A1
    • 2014-01-15
    • EP11860368.7
    • 2011-03-10
    • TOYOTA JIDOSHA KABUSHIKI KAISHA
    • SUZUKI, KenjiOKAZAKI Shuntaro
    • F02D41/02
    • F01N3/08F02D41/0032F02D41/0045F02D41/0295F02D41/1441
    • An embodiment (control apparatus) for an internal combustion engine according to the present invention determines, based on an output value Voxs of the downstream air-fuel ratio sensor 67 disposed downstream of a three-way catalyst 43, determines which air-fuel ratio request, a rich request or a lean request, is occurring. The control apparatus sets a target upstream air-fuel ratio abyfr to a target rich air-fuel ratio afRich when the rich request is occurring, and sets the target upstream air-fuel ratio abyfr to a target lean air-fuel ratio afLean when the lean request is occurring. Each of the target rich air-fuel ratio afRich and the target lean air-fuel ratio afLean is varied depending on an intake air amount Ga. Further, the control apparatus increases a purge amount of an evaporated fuel as a magnitude (air-fuel ratio change amount ΔAF, | afLean - afRich | ) of a difference between the target rich air-fuel ratio afRich and the target lean air-fuel ratio afLean becomes larger.
    • 根据本发明的用于内燃机的实施例(控制装置)基于设置在三元催化剂43下游的下游空燃比传感器67的输出值Voxs来确定哪个空燃比请求 ,丰富的请求或精益请求正在发生。 控制装置在发生浓空燃比要求的情况下,将目标上游侧空燃比abyfr设定为目标浓空燃比afRich,将稀空燃比abyfr设定为目标稀空燃比afLean 请求正在发生。 目标浓空燃比afRich和目标稀空燃比afLean中的每一个都根据进气量Ga而变化。此外,控制装置将蒸发燃料的清除量增加为大小(空燃比 目标浓空燃比afRich与目标稀空燃比afLean之差的变化量ΔAF,| afLean-afRich |)变大。