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    • 41. 发明授权
    • Air-fuel ratio control system for internal combustion engine
    • 内燃机空燃比控制系统
    • US08726637B2
    • 2014-05-20
    • US13565291
    • 2012-08-02
    • Tooru SekiguchiAtsuhiro MiyauchiTakeshi AokiMichinori TaniSeiji Watanabe
    • Tooru SekiguchiAtsuhiro MiyauchiTakeshi AokiMichinori TaniSeiji Watanabe
    • F01N3/08F02D41/00
    • F02D41/0085F02D41/1408F02D41/1455F02D2041/288
    • An oscillation signal is generated to oscillate the air-fuel ratio with a set frequency which is different from a 0.5th-order frequency (half of the frequency corresponding to a rotational speed of the engine). Air-fuel ratio perturbation control is performed to oscillate the air-fuel ratio according to the oscillation signal. An intensity of the 0.5th-order frequency component and the set frequency component contained in the detected air-fuel ratio signal are calculated. A determination parameter applied to determining an imbalance degree of air-fuel ratios corresponding to the plurality of cylinders is calculated according to the two intensities and determines an imbalance failure that the imbalance degree of the air-fuel ratios exceeds an acceptable limit. A predicted imbalance value, indicative of a predicted value of the imbalance degree, is calculated, and an amplitude of the oscillation signal is set according to the predicted imbalance value.
    • 产生振荡信号,以与不同于0.5次频率(对应于发动机的转速的一半频率)的设定频率来振荡空燃比。 执行空燃比扰动控制,以根据振荡信号使空燃比振荡。 计算包含在检测的空燃比信号中的0.5次频率分量和设定频率分量的强度。 根据两个强度计算用于确定对应于多个气缸的空燃比的不平衡度的确定参数,并且确定空燃比的不平衡度超过可接受极限的失衡失效。 计算表示不平衡度的预测值的预测不平衡值,根据预测的不平衡值设定振动信号的振幅。
    • 43. 发明申请
    • STOP CONTROL SYSTEM AND METHOD FOR INTERNAL COMBUSTION ENGINE
    • 内燃机停止控制系统及方法
    • US20120130619A1
    • 2012-05-24
    • US13384744
    • 2010-07-30
    • Tomoharu HozumiAtsushi MitsuiTakeshi AokiHiroshi YataniKazuhiko Imamura
    • Tomoharu HozumiAtsushi MitsuiTakeshi AokiHiroshi YataniKazuhiko Imamura
    • F02D17/04
    • F02D41/042F02D41/0002F02D41/10F02N19/005F02N2019/008
    • A stop control system for an internal combustion engine, which is capable of accurately stopping a piston at a predetermined position during stoppage of the engine while preventing occurrence of untoward noise and vibration. After stopping the engine 3, the stop control system 1 for the engine 3 according to the present invention executes a first stage control (step 34) in which a throttle valve 13a is controlled to a first stage control target opening degree ICMDOFPRE smaller than a second predetermined opening degree ICMDOF2, in order to stop the piston at the predetermined position, before executing a second stage control (step 42) in which the throttle valve 13a is controlled to the second predetermined opening degree ICMDOF2. Further, the stop control system 1 stabilizes initial conditions at the start of the second stage control by setting a first stage control start rotational speed NEICOFPRE and a first stage control target opening degree ICMDOFPRE according to a change in a corrected target stop control start rotational speed NEICOFREFN (steps 71 and 85).
    • 一种用于内燃机的停止控制系统,其能够在发动机停止期间精确地停止在预定位置处的活塞,同时防止发生不利的噪音和振动。 在停止发动机3之后,根据本发明的发动机3的停止控制系统1执行第一级控制(步骤34),其中节流阀13a被控制到小于第二级的第一级控制目标开度ICMDOFPRE 在执行将节气门13a控制到第二预定开度ICMDOF2的第二级控制(步骤42)之前,为了将活塞停止在预定位置,预定开度ICMDOF2。 此外,停止控制系统1通过根据修正的目标停止控制开始转动的变化设定第一级控制开始转速NEICOFPRE和第一级控制对象开度ICMDOFPRE来稳定第二级控制开始时的初始状态 NEICOFREFN(步骤71和85)。