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公开(公告)号：US08983754B2
公开(公告)日：2015-03-17
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
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。
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公开(公告)号：US20130047969A1
公开(公告)日：2013-02-28
申请号：US13527408
申请日：2012-06-19
申请人： Tooru Sekiguchi , Atsuhiro Miyauchi , Takeshi Aoki , Michinori Tani , Takashi Yanagiura , Seiji Watanabe
发明人： Tooru Sekiguchi , Atsuhiro Miyauchi , Takeshi Aoki , Michinori Tani , Takashi Yanagiura , Seiji Watanabe
IPC分类号： F02D41/00
CPC分类号： F02D41/1408 , F02D41/1495 , F02D41/22 , F02D2041/288 , Y02T10/40
摘要： An air-fuel ratio control system for an internal combustion engine has a perturbation control which oscillates the air-fuel ratio with a first frequency. A first difference signal is generated indicative of a difference between a present value and a first past value from an air-fuel ratio sensor detected at a timing of a first specific period which is set to reduce a specific frequency component corresponding to a specific frequency different from the first frequency. A first frequency component is extracted. A second difference signal is generated indicative of a difference between a present value and a second past value detected at a timing of a second specific period which is set to reduce the first frequency component. The specific frequency component is extracted. A failure of the control system is determined by a relationship between intensities of the first frequency component and the specific frequency component.
摘要翻译： 用于内燃机的空燃比控制系统具有以第一频率振荡空燃比的扰动控制。 产生第一差分信号，其指示在第一特定周期的定时检测到的空燃比传感器的当前值和第一过去值之间的差，其被设置为减小对应于特定频率不同的特定频率分量 从第一个频率。 提取第一频率分量。 产生指示在设定为减少第一频率分量的第二特定周期的定时检测到的当前值和第二过去值之间的差的第二差分信号。 提取特定频率分量。 控制系统的故障由第一频率分量和特定频率分量的强度之间的关系确定。
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公开(公告)号：US08965662B2
公开(公告)日：2015-02-24
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
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。
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公开(公告)号：US20130061581A1
公开(公告)日：2013-03-14
申请号：US13565291
申请日：2012-08-02
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。
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公开(公告)号：US09057337B2
公开(公告)日：2015-06-16
申请号：US13527408
申请日：2012-06-19
申请人： Tooru Sekiguchi , Atsuhiro Miyauchi , Takeshi Aoki , Michinori Tani , Takashi Yanagiura , Seiji Watanabe
发明人： Tooru Sekiguchi , Atsuhiro Miyauchi , Takeshi Aoki , Michinori Tani , Takashi Yanagiura , Seiji Watanabe
CPC分类号： F02D41/1408 , F02D41/1495 , F02D41/22 , F02D2041/288 , Y02T10/40
摘要： An air-fuel ratio control system for an internal combustion engine has a perturbation control which oscillates the air-fuel ratio with a first frequency. A first difference signal is generated indicative of a difference between a present value and a first past value from an air-fuel ratio sensor detected at a timing of a first specific period which is set to reduce a specific frequency component corresponding to a specific frequency different from the first frequency. A first frequency component is extracted. A second difference signal is generated indicative of a difference between a present value and a second past value detected at a timing of a second specific period which is set to reduce the first frequency component. The specific frequency component is extracted. A failure of the control system is determined by a relationship between intensities of the first frequency component and the specific frequency component.
摘要翻译： 用于内燃机的空燃比控制系统具有以第一频率振荡空燃比的扰动控制。 产生第一差分信号，其指示在第一特定周期的定时检测到的空燃比传感器的当前值和第一过去值之间的差，其被设置为减小对应于特定频率不同的特定频率分量 从第一个频率。 提取第一频率分量。 产生指示在设定为减少第一频率分量的第二特定周期的定时检测到的当前值和第二过去值之间的差的第二差分信号。 提取特定频率分量。 控制系统的故障由第一频率分量和特定频率分量的强度之间的关系决定。
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公开(公告)号：US08726637B2
公开(公告)日：2014-05-20
申请号：US13565291
申请日：2012-08-02
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。
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7.发明授权公开(公告)号：US09523318B2
公开(公告)日：2016-12-20
申请号：US13557221
申请日：2012-07-25
CPC分类号： F02D41/0085 , F02D41/1401 , F02D41/1456 , F02D41/1495 , F02D2041/288
摘要： An air-fuel ratio control apparatus includes an air-fuel ratio detector, an oscillation signal generator, an air-fuel ratio oscillation device, a sum/difference frequency component intensity calculator, a decision parameter calculator, and an imbalance failure determination device. The sum/difference frequency component intensity calculator is configured to calculate, while the air-fuel ratio oscillation device is in operation, at least one of a component intensity of a difference frequency and a component intensity of a sum frequency. The decision parameter calculator is configured to calculate, according to at least one of the component intensity of the difference frequency and the component intensity of the sum frequency, a decision parameter to determine a degree of imbalance of an air-fuel ratio. The imbalance failure determination device is configured to determine an imbalance failure in which the degree of imbalance of the air-fuel ratio exceeds an allowable limit using the decision parameter.
摘要翻译： 空燃比控制装置包括空燃比检测器，振荡信号发生器，空燃比振荡装置，和/差频分量强度计算器，判定参数计算器和不平衡失效判定装置。 总和/差分分量强度计算器构成为在空燃比振荡装置工作时计算差频的分量强度和和频分量强度中的至少一个。 决策参数计算器被配置为根据差频的分量强度和和频的分量强度中的至少一个来计算用于确定空燃比的不平衡程度的判定参数。 不平衡失效判定装置被构造成使用判定参数来确定空燃比的不平衡度超过允许极限的不平衡故障。
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8.发明申请AIR-FUEL RATIO CONTROL APPARATUS FOR INTERNAL COMBUSTION ENGINE AND METHOD FOR CONTROLLING AIR-FUEL RATIO 有权用于内燃机的空燃比比控制装置及控制空燃比的方法公开(公告)号：US20130090834A1
公开(公告)日：2013-04-11
申请号：US13557221
申请日：2012-07-25
IPC分类号： F02D41/26
CPC分类号： F02D41/0085 , F02D41/1401 , F02D41/1456 , F02D41/1495 , F02D2041/288
摘要： An air-fuel ratio control apparatus includes an air-fuel ratio detector, an oscillation signal generator, an air-fuel ratio oscillation device, a sum/difference frequency component intensity calculator, a decision parameter calculator, and an imbalance failure determination device. The sum/difference frequency component intensity calculator is configured to calculate, while the air-fuel ratio oscillation device is in operation, at least one of a component intensity of a difference frequency and a component intensity of a sum frequency. The decision parameter calculator is configured to calculate, according to at least one of the component intensity of the difference frequency and the component intensity of the sum frequency, a decision parameter to determine a degree of imbalance of an air-fuel ratio. The imbalance failure determination device is configured to determine an imbalance failure in which the degree of imbalance of the air-fuel ratio exceeds an allowable limit using the decision parameter.
摘要翻译： 空燃比控制装置包括空燃比检测器，振荡信号发生器，空燃比振荡装置，和/差频分量强度计算器，判定参数计算器和不平衡失效判定装置。 总和/差分分量强度计算器构成为在空燃比振荡装置工作时计算差频的分量强度和和频分量强度中的至少一个。 决策参数计算器被配置为根据差频的分量强度和和频的分量强度中的至少一个来计算用于确定空燃比的不平衡程度的判定参数。 不平衡失效判定装置被构造成使用判定参数来确定空燃比的不平衡度超过允许极限的不平衡故障。
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公开(公告)号：US08818690B2
公开(公告)日：2014-08-26
申请号：US13174653
申请日：2011-06-30
CPC分类号： F02D41/1454 , F02D41/1402 , F02D41/1403 , F02D41/1441 , F02D2041/1409 , F02D2200/021
摘要： An air-fuel ratio control apparatus for an internal combustion engine includes an air-fuel ratio sensor having an output characteristic which is nonlinear with respect to the air-fuel ratio of exhaust gas. An output deviation converter is configured to convert an output deviation to a first predetermined value if an output value of the air-fuel ratio sensor is on a richer side of a predetermined target value and to a second predetermined value if the output value is on a leaner side of the target value. A control input calculator is configured to calculate a control input to feedback-control the output value of the air-fuel ratio sensor such that the output deviation converted by the output deviation converter is to be zero. An air-fuel ratio controller is configured to control the air-fuel ratio of exhaust gas using the control input calculated by the control input calculator.
摘要翻译： 用于内燃机的空燃比控制装置包括具有相对于排气的空燃比为非线性的输出特性的空燃比传感器。 如果空燃比传感器的输出值处于预定目标值的较浓侧，则输出偏差转换器被配置为将输出偏差转换为第一预定值，并且如果输出值为 目标价值的一方较瘦。 控制输入计算器被配置为计算控制输入以反馈控制空燃比传感器的输出值，使得由输出偏差转换器转换的输出偏差为零。 空燃比控制器使用由控制输入计算器计算出的控制输入来控制排气的空燃比。
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公开(公告)号：US09249712B2
公开(公告)日：2016-02-02
申请号：US13158192
申请日：2011-06-10
CPC分类号： F01N11/00 , F01N2560/025 , F02D41/1403 , F02D41/1441 , F02D41/1482 , F02D41/149 , F02D41/2454 , Y02T10/47
摘要： An air-fuel ratio control system for an internal combustion engine, which, at the resumption of air-fuel ratio feedback control, is capable of setting the initial value of an integral term of the feedback control to a value properly learned in preceding feedback control, thereby enabling improvement of control accuracy. To feedback-control the output value of an O2 sensor to a target value, a target air-fuel ratio is calculated. During the feedback control, when it is determined that a predetermined condition in which it is estimated that exhaust gas air-fuel ratio upstream of the catalyst is excellently reflected on an exhaust gas air-fuel ratio at a location midway or downstream of the catalyst is satisfied, an adaptive law input calculated immediately before interruption of the feedback control is updated and stored as the initial value of an integral term for the following execution of the feedback control.
摘要翻译： 一种用于内燃机的空燃比控制系统，其在恢复空燃比反馈控制时能够将反馈控制的积分项的初始值设定为在先前的反馈控制中正确学习的值 从而能够提高控制精度。 为了将O2传感器的输出值反馈到目标值，计算目标空燃比。 在反馈控制期间，当确定在催化剂上游或下游位置处的排气气体排放气体空气燃料比优异地反映催化剂上游的排气空燃比的预定条件是， 满足于在反馈控制中断之前计算的自适应法则输入被更新并存储为用于随后执行反馈控制的积分项的初始值。
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