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    • 75. 发明授权
    • Engine control system and method
    • 发动机控制系统及方法
    • US5941223A
    • 1999-08-24
    • US710730
    • 1996-09-20
    • Masahiko Kato
    • Masahiko Kato
    • F02D41/02F02B61/04F02B75/02F02B75/18F02B75/22F02D41/04F02D41/14
    • F02D41/1482F02B61/045F02D41/1477F02B2075/025F02B2075/1824F02B75/22F02D2400/04
    • A feedback control system and method for operating an internal combustion engine to provide the desired air/fuel ratio under all running conditions. The feedback control operates to modify the fuel/air ratio from that achieved by a basic setting that is derived from parameters of engine performance so as to maintain the desired ratio. The feedback control adjusts the air/fuel ratio in two different modes. In a first lean-set mode, when the air/fuel ratio is indicated to be lean, the feedback control adjusts the air/fuel mixture in a first large step and then a number of smaller incremental steps. In a second normal-operational mode, when adjustments to the air/fuel ratio is indicated to be rich, the feedback control adjusts the air/fuel mixture in a first large and then several smaller incremental steps, these steps being larger and more closely spaced in time than their respective counterpart steps in the lean-set mode.
    • 一种用于在所有运行条件下操作内燃机以提供所需空气/燃料比的反馈控制系统和方法。 反馈控制操作以通过从发动机性能参数导出的基本设置实现的燃料/空气比来改变燃料/空气比,以保持所需的比率。 反馈控制可以在两种不同的模式下调节空燃比。 在第一稀薄模式中,当空燃比指示为倾斜时,反馈控制在第一大步骤中然后多个较小的增量步骤调节空气/燃料混合物。 在第二正常操作模式中,当空气/燃料比的调节被指示为丰富时,反馈控制在第一大的然后几个较小的增量步骤中调节空气/燃料混合物,这些步骤是更大和更紧密的间隔 在时间上比他们在精益模式下的各自对应的步骤。
    • 79. 发明授权
    • Method and apparatus for detecting saturation gas amount absorbed by
catalytic converter
    • 用于检测催化转化器吸收的饱和气体量的方法和装置
    • US5622047A
    • 1997-04-22
    • US318599
    • 1994-10-05
    • Yukihiro YamashitaKenji IkutaShigenori Isomura
    • Yukihiro YamashitaKenji IkutaShigenori Isomura
    • F01N11/00F02D41/14F01N3/20
    • F02D41/1441F01N11/007F02D41/1477F01N2550/02F01N2900/0422Y02T10/47
    • In an apparatus for detecting a saturation gas amount absorbed by a catalytic converter disposed in an exhaust system of an engine, an air-to-fuel ratio detecting device is disposed in a region of the engine exhaust system downstream of the catalytic converter for monitoring exhaust gas, which has passed through the catalytic converter, to detect an air-to-fuel ratio of an air-fuel mixture causing the exhaust gas. An air-to-fuel ratio changing device serves to change an air-to-fuel ratio of an air-fuel mixture fed to the engine by a correction quantity in a given direction, and serves to maintain changing the air-to-fuel ratio during a correction time. A change increasing device serves to increase the correction quantity and/or the correction time by the air-to-fuel ratio changing device to execute an air-to-fuel ratio changing process again in cases where the air-to-fuel ratio detected by the air-to-fuel ratio detecting device does not vary even when the air-to-fuel ratio changing device executes changing the air-to-fuel ratio. A saturation gas amount calculating device serves to calculate a saturation gas amount absorbed by the catalytic converter on the basis of the correction quantity and the correction time in cases where the air-to-fuel ratio detected by the air-to-fuel ratio detecting device varies when the air-to-fuel ratio changing device executes changing the air-to-fuel ratio.
    • 在用于检测由设置在发动机的排气系统中的催化转化器吸收的饱和气体量的装置中,空气 - 燃料比检测装置设置在用于监测排气的催化转化器的下游的发动机排气系统的区域 已经通过催化转化器的气体检测引起废气的空气 - 燃料混合物的空燃比。 空燃比改变装置用于通过给定方向的校正量来改变供给发动机的空气燃料混合物的空燃比,并且用于维持空燃比的变化 在修正时间。 变化增加装置用于通过空燃比改变装置增加校正量和/或校正时间,以在由空气 - 燃料比变化装置检测到的空燃比的情况下再次执行空燃比变更处理 空燃比检测装置即使当空燃比改变装置执行改变空燃比时也不变化。 饱和气体量计算装置用于根据空气 - 燃料比检测装置检测到的空气燃料比,基于校正量和校正时间来计算由催化转化器吸收的饱和气体量 当空燃比改变装置执行改变空燃比时,会发生变化。