公开(公告)号：US20130054112A1

公开(公告)日：2013-02-28

申请号：US13473593

申请日：2012-05-17

申请人： Seiji WATANABE ,  Tooru SEKIGUCHI ,  Hiroyuki ANDO ,  Atsuhiro MIYAUCHI ,  Takeshi AOKI ,  Michinori TANI ,  Soichiro GOTO

发明人： Seiji WATANABE ,  Tooru SEKIGUCHI ,  Hiroyuki ANDO ,  Atsuhiro MIYAUCHI ,  Takeshi AOKI ,  Michinori TANI ,  Soichiro GOTO

IPC分类号： F02D41/26

CPC分类号： F02D41/1456 ,  F02D41/1495 ,  F02D2041/288

摘要： An apparatus for controlling an air-fuel ratio of an internal-combustion engine includes an air-fuel ratio detector, a fluctuation signal generating device, an air-fuel ratio fluctuation device, a 0.5th-order frequency component strength calculator, a fluctuation frequency component strength calculator, a reference component strength calculator, and an imbalance fault determining device. The reference component strength calculator is configured to calculate strength of a reference component in accordance with strength of a first frequency component and strength of a second frequency component. The imbalance fault determining device is configured to make a determination of an imbalance fault in which air-fuel ratios of a plurality of cylinders vary beyond a tolerance limit on a basis of a relative relationship between strength of the 0.5th-order frequency component and the strength of the reference component.

摘要翻译： 用于控制内燃机的空燃比的装置包括空燃比检测器，变动信号发生装置，空燃比变动装置，0.5次频率分量强度计算器，波动频率 分量强度计算器，参考分量强度计算器和不平衡故障确定装置。 参考分量强度计算器被配置为根据第一频率分量的强度和第二频率分量的强度来计算参考分量的强度。 不平衡故障确定装置被配置为基于0.5次频率分量的强度与第5级频率分量的相对关系来确定多个气缸的空燃比变化超过公差极限的不平衡故障 参考组件的强度。

公开(公告)号：US20120310512A1

公开(公告)日：2012-12-06

申请号：US13436996

申请日：2012-04-02

申请人： Takeshi AOKI ,  Atsuhiro MIYAUCHI ,  Michinori TANI ,  Seiji WATANABE ,  Tooru SEKIGUCHI ,  Hiroyuki ANDO

发明人： Takeshi AOKI ,  Atsuhiro MIYAUCHI ,  Michinori TANI ,  Seiji WATANABE ,  Tooru SEKIGUCHI ,  Hiroyuki ANDO

IPC分类号： F02D41/26 ,  F02D28/00

CPC分类号： F02D41/1495 ,  F02D41/123 ,  F02D41/126

摘要： An abnormality determining apparatus includes an air-fuel ratio controller, an output change period parameter calculator, an output change amount extremum calculator, and an abnormality determining device. The abnormality determining device is configured to determine an abnormality of an air-fuel ratio sensor based on a relationship between an output change period parameter and an output change amount extremum.

摘要翻译： 异常判定装置包括空燃比控制器，输出变化周期参数运算器，输出变化量极值计算器和异常判定装置。 异常判定装置基于输出变化周期参数和输出变化量极值之间的关系来确定空燃比传感器的异常。

公开(公告)号：US20130061581A1

公开(公告)日：2013-03-14

申请号：US13565291

申请日：2012-08-02

申请人： Tooru SEKIGUCHI ,  Atsuhiro Miyauchi ,  Takeshi Aoki ,  Michinori Tani ,  Seiji Watanabe

发明人： Tooru SEKIGUCHI ,  Atsuhiro Miyauchi ,  Takeshi Aoki ,  Michinori Tani ,  Seiji Watanabe

IPC分类号： F02D41/00 ,  F01N3/08

CPC分类号： F02D41/0085 ,  F02D41/1408 ,  F02D41/1455 ,  F02D2041/288

摘要： 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.

摘要翻译： 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。