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    • 3. 发明公开
    • INTERNAL COMBUSTION ENGINE
    • VERBRENNUNGSMOTOR
    • EP3088712A2
    • 2016-11-02
    • EP16166965.0
    • 2016-04-26
    • Toyota Jidosha Kabushiki Kaisha
    • KAYANUMA, RyosukeYAMAGUCHI, YujiSUZUKI, KazuyaMIYOSHI, YujiHOSHI, Koichi
    • F02D41/00F02D41/14F02D41/30F02D41/02F02D41/34
    • F02D9/02F02B75/10F02B75/18F02D41/0082F02D41/025F02D41/0255F02D41/028F02D41/1408F02D41/1441F02D41/1454F02D41/3094F02D41/345Y02T10/26
    • An internal combustion engine which has a plurality of cylinders comprises port fuel injectors (12), cylinder fuel injectors (11), an exhaust purification catalyst (20) arranged at an engine exhaust passage, a downstream side air-fuel ratio sensor (41), and a control device (31) controlling a combustion air-fuel ratio and a ratio of feed of fuel from two fuel injectors, wherein the control device (31) is configured to be able to perform average air-fuel ratio control where it alternately controls an average air-fuel ratio to a rich air-fuel ratio and a lean air-fuel ratio and inter-cylinder air-fuel ratio control where it controls the combustion air-fuel ratios of the cylinders so that the combustion air-fuel ratios of the cylinders become richer and leaner than the average air-fuel ratio. The control device 31 controls the feed ratio so that an amount of fuel feed from the port fuel injectors (12) becomes greater than an amount of fuel feed from the cylinder fuel injectors (11) for cylinders where the combustion air-fuel ratio is made leaner than the average air-fuel ratio when the inter-cylinder air-fuel ratio control is being performed.
    • 具有多个气缸的内燃机包括端口燃料喷射器(12),气缸燃料喷射器(11),布置在发动机排气通道处的排气净化催化剂(20),下游侧空燃比传感器(41) ,以及控制燃料空燃比和来自两个燃料喷射器的燃料供给量的控制装置(31),其中,所述控制装置(31)构成为能够进行交替地进行的平均空燃比控制 将平均空燃比控制在浓空燃比和稀空燃比和气缸间空燃比控制中,其中其控制气缸的燃烧空燃比使得燃烧空燃比 的气缸变得比平均空燃比更浓和更浓。 控制装置31控制进给比,使得从端口燃料喷射器(12)的燃料供给量变得大于来自用于燃烧空燃比的气缸的气缸燃料喷射器(11)的燃料供给量 比进行缸内空燃比控制时的平均空燃比更精细。