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    • 9. 发明公开
    • METHOD AND ARRANGEMENT FOR CONTROLLING AIR TO FUEL RATIO IN AN INTERNAL COMBUSTION ENGINE
    • 方法和系统,用于控制内燃发动机空燃比
    • EP3114342A1
    • 2017-01-11
    • EP14712697.3
    • 2014-03-07
    • Wärtsilä Finland Oy
    • KAAS, TomÖSTMAN, Fredrik
    • F02D41/10F02D41/14F02D41/00
    • F02D41/0007F02D41/10F02D41/1401F02D2041/1409F02D2041/1432Y02T10/144
    • An AFR control system for controlling air to fuel ratio in an internal combustion engine, comprising: - a feedback controller (402) configured to compare a measured air amount in-dicator to a setpoint value (410) and to produce a feedback control output (403), - a setpoint selector (404) configured to select a steady-state setpoint value (405) on the basis of known requirements of operation, - a first transient controller (407) configured to produce a transient setpoint off-set (408) as a response to a change in fuel demand of said internal combustion en- gine, and - a second transient controller (411, 811) configured to produce a transient output offset (412, 812) as a re- sponse to a change in either said steady-state setpoint value (405) or said setpoint value (410); wherein said setpoint value (410) is a combination of said steady-state setpoint value (405) and said transi- ent setpoint offset (408), and wherein an output (414) of the AFR control system is a combination of said feedback control output (403) and said transient output offset (412, 812).
    • (A反馈控制器(402),配置成在-dicator一个测得的空气量进行比较,以设定点值(410),并产生一个反馈控制输出 - :用于在内燃机中,包括控制空气燃料比的AFR控制系统 403), - 设定点选择器(404)被配置为选择的操作的已知的需求,在此基础上的稳态设定点值(405) - )配置成产生瞬时设定值的第一瞬态控制器(407抵销(408 ),作为对在所述内燃烯gine的燃料需求的变化的响应,以及 - 配置成产生瞬态输出偏移(412,812),作为对在变化的响应的第二过渡控制部(411,811) 任一所述的稳态设定点值(405)或所述设定点值(410); worin所述设定点值(410)是偏离所述稳态设定点值(405)和所述transis- ENT设定值的组合(408),和worin到AFR控制系统的输出(414)是所述反馈控制的组合 输出(403)和所述瞬态输出偏移(412,812)。