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    • 6. 发明申请
    • INTERNAL COMBUSTION ENGINE AND METHOD OF CONTROLLING THE SAME
    • 内燃机及其控制方法
    • WO2007069032A2
    • 2007-06-21
    • PCT/IB2006003566
    • 2006-12-12
    • TOYOTA MOTOR CO LTDHOKUTO HIROYUKI
    • HOKUTO HIROYUKI
    • F02D41/00F02D41/14F02M25/08
    • F02D41/1443F02D41/0045F02M25/089
    • The cylinders of an internal combustion engine are divided into at least two cylinder groups. First air-fuel ratio sensors (11, 12) are disposed in each exhaust branch pipe (5, 6) connected to the cylinder groups, and a second air-fuel ratio sensor (13) is disposed in a common exhaust pipe (7) upstream from the catalyst (10). When a vapor amount introduced into an intake passage (4) during purge control is determined, the vapor amount is determined during normal operation using the output values from the first air-fuel ratio sensors (11, 12) and the value of vapor amount learned during normal operation. During rich-lean operation, the vapor amount is determined using the output value from the second air-fuel ratio sensor (13) and the value of vapor amount learned during rich-lean operation. By doing this, the vapor amount introduced into the intake passage (4) when a switch is made from normal to rich-lean operation of the internal combustion engine is accurately determined.
    • 内燃机的气缸被分成至少两个气缸组。 第一空燃比传感器(11,12)设置在与气缸组连接的每个排气支管(5,6)中,并且第二空燃比传感器(13)设置在公共排气管(7)中, 在催化剂(10)的上游。 当确定净化控制期间引入进气通道(4)中的蒸气量时,使用第一空燃比传感器(11,12)的输出值和所获得的蒸汽量的值在正常操作期间确定蒸气量 在正常操作期间。 在浓空燃比运转时,使用第二空燃比传感器13的输出值和浓空燃比运转时的蒸气量的值来决定蒸气量。 通过这样做,准确地确定了当从内燃机的正常到浓 - 稀操作切换时引入到进气通道(4)中的蒸汽量。