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    • 1. 发明公开
    • 내연 기관용 공연비 제어 장치
    • 用于内燃机的空燃比控制装置
    • KR1020080063416A
    • 2008-07-03
    • KR1020087012378
    • 2006-11-13
    • 도요타지도샤가부시키가이샤
    • 오까자끼슌따로오가또오나오또
    • F01N11/00F02D41/14
    • F02D41/1456F01N3/101F01N13/009F01N13/0093F01N2560/025F02D41/1441F02D41/1483F02D41/1487F02D2041/1409Y02A50/2324Y02T10/22
    • The air-fuel-ratio control apparatus for an internal combustion engine obtains a composite air-fuel ratio abyfs from a downstream-side correction value Vafsfb(k) based upon an output value Voxs from a downstream air-fuel-ratio sensor 67 and an output value Vabyfs from an upstream air-fuel-ratio sensor 66, and obtains an upstream-side feedback correction value DFi on the basis of the composite air-fuel ratio abyfs. A fuel injection quantity Fi is determined to a value obtained by adding the upstream-side correction value DFi to a control-use base fuel injection quantity Fbasec (= base fuel injection quantity Fbase . coefficient Ksub). The coefficient Ksub is determined on the basis of the downstream-side feedback correction value Vafsfb(k) in such a manner that the control-use base fuel injection quantity Fbasec (accordingly, the fuel injection quantity Fi) is determined such that the output value Vabyfs from the upstream air-fuel-ratio sensor 66 changes in the direction of canceling the change in the downstream-side feedback correction value Vafsfb(k).
    • 用于内燃机的空燃比控制装置根据来自下游空燃比传感器67的输出值Voxs和下游侧空燃比传感器67的输出值Voxs,从下游侧校正值Vafsfb(k)获得复合空燃比abyfs 从上游空燃比传感器66输出的输出值Vabyfs,基于复合空燃比abyfs求出上游侧反馈修正值DFi。 燃料喷射量Fi被确定为通过将上游侧校正值DFi加到控制用基础燃料喷射量Fbasec(=基础燃料喷射量Fbase。系数Ksub)而获得的值。 基于下游侧反馈校正值Vafsfb(k)来确定系数Ksub,使得控制用基础燃料喷射量Fbasec(相应地,燃料喷射量Fi)被确定为使得输出值 来自上游空燃比传感器66的Vabyfs在抵消下游侧反馈校正值Vafsfb(k)的变化的方向上变化。