公开(公告)号：US09719449B2

公开(公告)日：2017-08-01

申请号：US14900645

申请日：2013-06-26

申请人： Hiroshi Miyamoto ,  Keiichiro Aoki ,  Yasushi Iwazaki

发明人： Hiroshi Miyamoto ,  Keiichiro Aoki ,  Yasushi Iwazaki

IPC分类号： F01N3/00 ,  F02D41/14 ,  F02D41/12 ,  F01N11/00 ,  F01N3/10 ,  F02D41/02 ,  F02D41/22 ,  F01N13/00

CPC分类号： F02D41/1495 ,  F01N3/10 ,  F01N11/007 ,  F01N13/009 ,  F01N2550/02 ,  F01N2900/0416 ,  F01N2900/1624 ,  F02D41/0295 ,  F02D41/123 ,  F02D41/1441 ,  F02D41/1454 ,  F02D2041/228 ,  F02D2200/0814 ,  F02D2200/0816 ,  Y02T10/47

摘要： An internal combustion engine comprises an exhaust purification catalyst arranged in an exhaust passage of the internal combustion engine and being able to store oxygen in inflowing exhaust gas and an air-fuel ratio sensor arranged at a downstream side of the exhaust purification catalyst in a direction of exhaust flow and detecting an air-fuel ratio of exhaust gas flowing out from the exhaust purification catalyst and stops or decreases a feed of fuel to a combustion chamber as fuel cut control. The abnormality diagnosis system calculates a characteristic of change of an air-fuel ratio based on an output air-fuel ratio output from the air-fuel ratio sensor at the time when the output air-fuel ratio first passes a part of an air-fuel ratio region of a stoichiometric air-fuel ratio or more after an end of the fuel cut control, and diagnoses abnormality of the air-fuel ratio sensor based on the characteristic of change of the air-fuel ratio. As a result, the diagnosis system can diagnose the abnormality of deterioration of response of the downstream side air-fuel ratio sensor when necessary without fail when performing fuel cut control.

公开(公告)号：US08833348B2

公开(公告)日：2014-09-16

申请号：US13194923

申请日：2011-07-30

申请人： Yasushi Iwazaki ,  Hiroshi Miyamoto

发明人： Yasushi Iwazaki ,  Hiroshi Miyamoto

IPC分类号： F02D41/14 ,  F02D41/00 ,  F02D41/18 ,  F02D41/24 ,  F02D41/30 ,  G01N27/00

CPC分类号： F02D41/1456 ,  F02D41/0085 ,  F02D41/1401 ,  F02D41/1441 ,  F02D41/182 ,  F02D41/2454 ,  F02D2041/1432 ,  F02D2200/101

摘要： A fuel injection amount control system acquires a pre-correction air-fuel ratio imbalance index value that increases as the degree of ununiformity in the air-fuel ratio among cylinders increases, based on an output value of an upstream air-fuel ratio sensor, and obtains a value (intake air amount correlation value) corresponding to the intake air amount and a value (engine speed correlation value) corresponding to the engine speed over a period in which the pre-correction air-fuel ratio imbalance index value is acquired. Also, a post-correction air-fuel ratio imbalance index value is acquired by correcting the pre-correction air-fuel ratio imbalance index value based on the intake air amount correlation value and the engine speed correlation value, and the air-fuel ratio of the engine is controlled based on the post-correction air-fuel ratio imbalance index value.

摘要翻译： 燃料喷射量控制系统获取基于上游空燃比传感器的输出值随着气缸中的空燃比的不均匀度增加而增加的预校正空燃比不平衡指数值，以及 获取与获取预校正空燃比不平衡指数值的期间对应的与进气量对应的值（进气量相关值）和与发动机转速对应的值（发动机转速相关值）。 此外，通过基于进气量相关值和发动机转速相关值校正预校正空燃比不平衡指数值来获取校正后空燃比不平衡指数值，并且， 基于校正后的空燃比不平衡指数值来控制发动机。

公开(公告)号：US08700290B2

公开(公告)日：2014-04-15

申请号：US13185015

申请日：2011-07-18

申请人： Hiroshi Miyamoto ,  Yasushi Iwazaki

发明人： Hiroshi Miyamoto ,  Yasushi Iwazaki

IPC分类号： F02D41/30 ,  F02D28/00 ,  F02D19/02

CPC分类号： F02D41/1495 ,  F02D41/0037 ,  F02D41/0085 ,  F02D41/1441 ,  F02D41/1456 ,  F02D41/2441 ,  F02D41/2454

摘要： When the ratio of the amount of vaporized fuel (purge amount) to be introduced into an intake passage of an engine from a fuel tank through a purge passage pipe, a purge control valve, etc. to the total amount of fuel (total fuel amount) to be supplied to the engine is large, an abnormality determination system acquires, as a parameter Pon, the air-fuel ratio imbalance index value that increases as the difference between the air-fuel ratios of the respective cylinders increases. When the purge amount is small relative to the total fuel amount, the determination system acquires the air-fuel ratio imbalance index value as a parameter Poff. When the difference between the parameters Pon and Poff is less than a predetermined value and at least one of these parameters is greater than a predetermined threshold value, the determination system determines that an inter-cylinder air intake amount variation abnormality is occurring.

摘要翻译： 当要从燃料箱通过吹扫通道管，净化控制阀等引入发动机的进气通道中的汽化燃料量（吹扫量）与燃料总量的比例（总燃料量 ），异常判定系统作为参数Pon获取随着各气缸的空燃比的差增大而增加的空燃比不平衡指数值。 当清除量相对于总燃料量小时，确定系统获取作为参数Poff的空燃比不平衡指数值。 当参数Pon和Poff之间的差小于预定值并且这些参数中的至少一个大于预定阈值时，确定系统确定发生了气缸间进气量变化异常。

公开(公告)号：US08670917B2

公开(公告)日：2014-03-11

申请号：US13500543

申请日：2009-10-06

申请人： Keiichiro Aoki ,  Yasushi Iwazaki

发明人： Keiichiro Aoki ,  Yasushi Iwazaki

IPC分类号： F02D41/26

CPC分类号： F02D41/1454 ,  F02D41/0085 ,  F02D41/1456 ,  F02D41/1486

摘要： An inter-cylinder air-fuel-ratio imbalance determination apparatus includes an air-fuel-ratio sensor in an exhaust passage of an engine. The air-fuel-ratio sensor functions as a limiting-current-type wide range air-fuel-ratio sensor when a voltage is applied, and functions as a concentration-cell-type oxygen concentration sensor when no voltage is applied. The determination apparatus causes the air-fuel-ratio sensor to function as the limiting-current-type wide range air-fuel-ratio sensor, and executes air-fuel ratio feedback control on the basis of the output value of the air-fuel-ratio sensor. When an imbalance determination parameter is obtained, the determination apparatus causes the air-fuel-ratio sensor to function as the concentration-cell-type oxygen concentration sensor, and obtains, as the imbalance determination parameter, a value corresponding to the differentiated value of the output value of the air-fuel-ratio sensor. The determination apparatus determines an inter-cylinder air-fuel-ratio imbalance state, when the absolute value of the imbalance determination parameter is greater than an imbalance determination threshold value.

摘要翻译： 气缸内空气比不平衡确定装置包括在发动机的排气通道中的空燃比传感器。 当施加电压时，空燃比传感器用作限流型宽范围空燃比传感器，并且当不施加电压时用作浓度电池型氧浓度传感器。 判定装置使空燃比传感器作为极限电流型宽范围空燃比传感器发挥作用，并且基于空燃比传感器的输出值来执行空燃比反馈控制， 比传感器 当获得不平衡确定参数时，确定装置使空燃比传感器用作浓度单元型氧浓度传感器，并且获得与不平衡确定参数对应的值 空燃比传感器的输出值。 当不平衡确定参数的绝对值大于不平衡确定阈值时，确定装置确定气缸间空燃比不平衡状态。

公开(公告)号：US20130253802A1

公开(公告)日：2013-09-26

申请号：US13827660

申请日：2013-03-14

申请人： Hiroshi Miyamoto ,  Kenji Suzuki ,  Yasushi Iwazaki ,  Takanori Sasaki

发明人： Hiroshi Miyamoto ,  Kenji Suzuki ,  Yasushi Iwazaki ,  Takanori Sasaki

IPC分类号： F02D43/04

CPC分类号： F02D43/04 ,  F02D41/008 ,  F02D41/1456 ,  F02D41/1495 ,  F02D2041/001 ,  F02D2250/34

摘要： An air-fuel ratio imbalance detection apparatus includes an air-fuel ratio sensor that is arranged in an exhaust passage of an internal combustion engine and that includes an electrode and a diffusion layer provided on the electrode; an estimating unit configured to estimate or detect an output variation amount that is an amount of variation in an output of the air-fuel ratio sensor due to an influence of a pressure pulsation of exhaust gas from the internal combustion engine; and a determination unit configured to determine whether there is an air-fuel ratio imbalance among cylinders of the internal combustion engine, on the basis of the output variation amount and a determination value based on the output of the air-fuel ratio sensor.

摘要翻译： 空燃比不平衡检测装置包括：空燃比传感器，其设置在内燃机的排气通路中，并且包括设置在电极上的电极和扩散层; 估计单元，其被配置为估计或检测作为所述空燃比传感器的输出的变化量的输出变化量，所述输出变化量是由于来自所述内燃机的废气的压力脉动的影响; 以及确定单元，被配置为基于所述输出变化量和基于所述空燃比传感器的输出的确定值来确定所述内燃机的气缸中是否存在空燃比不平衡。

公开(公告)号：US07751966B2

公开(公告)日：2010-07-06

申请号：US12003021

申请日：2007-12-19

申请人： Yasushi Iwazaki

发明人： Yasushi Iwazaki

IPC分类号： G06F19/00 ,  G06G7/70

CPC分类号： G01M15/104

摘要： In an abnormality diagnostic device and an abnormality diagnostic device for an air-fuel ratio sensor that detects the air-fuel ratio of exhaust gas of an internal combustion engine, a system extending from a fuel injection valve to the air-fuel ratio sensor is model by a first order response delay, and a parameter in the first order response delay is identified based on an input air-fuel ratio that is given to the air-fuel ratio sensor and an output air-fuel ratio that is output from the air-fuel ratio sensor. Then, the presence/absence of abnormality regarding a predetermined characteristic of the air-fuel ratio sensor is determined based on the parameter identified. Thus, abnormality is diagnosed regarding individual characteristics of the air-fuel ratio sensor.

摘要翻译： 在检测内燃机的排气的空燃比的空燃比传感器的异常诊断装置和异常诊断装置中，从燃料喷射阀向空燃比传感器延伸的系统为型 通过一阶响应延迟，并且基于给予空燃比传感器的输入空燃比和从空燃比传感器输出的输出空燃比来识别一阶响应延迟中的参数， 燃油比传感器 然后，基于所确定的参数来确定关于空燃比传感器的预定特性的异常的存在/不存在。 因此，关于空燃比传感器的个体特性来诊断异常。

公开(公告)号：US07725247B2

公开(公告)日：2010-05-25

申请号：US12068322

申请日：2008-02-05

申请人： Yasushi Iwazaki

发明人： Yasushi Iwazaki

IPC分类号： G06F19/00 ,  G06G7/70

CPC分类号： F02D41/1495 ,  F02D41/123 ,  F02D41/1454 ,  F02D41/1458 ,  F02D41/222 ,  F02D2041/1433 ,  G01M15/10

摘要： A system extending from a fuel injection valve to an air-fuel ratio sensor is modeled by using a first order response delay element. Parameters of the first order response delay element T, k are identified based on an input u(t) based on an input air-fuel ratio that occurs when the input air-fuel ratio is relatively sharply changed in accordance with an engine operation requirement, and an output y(t) of the air-fuel ratio sensor that changes in response to a change in the input air-fuel ratio. Then, an abnormality of characteristics (response rate and output) of the air-fuel ratio sensor is determined based on the identified parameter.

摘要翻译： 从燃料喷射阀延伸到空燃比传感器的系统通过使用一阶响应延迟元件来建模。 基于根据发动机运转要求输入空燃比相对急剧变化时的输入空燃比，基于输入u（t）来识别一阶响应延迟元件T，k的参数， 以及响应于输入空燃比的变化而变化的空燃比传感器的输出y（t）。 然后，基于所识别的参数来确定空燃比传感器的特性（响应率和输出）的异常。

公开(公告)号：US20080251057A1

公开(公告)日：2008-10-16

申请号：US12078627

申请日：2008-04-02

申请人： Yasushi Iwazaki

发明人： Yasushi Iwazaki

IPC分类号： F02D41/00

CPC分类号： F02D41/1495 ,  F01N3/101 ,  F01N13/009 ,  F01N2560/025 ,  F01N2560/14 ,  F02D41/1454 ,  F02D41/1458 ,  Y02T10/22

摘要： An abnormality diagnostic device for an air-fuel ratio sensor that detects the air-fuel ratio of exhaust gas of an internal combustion engine is provided. The abnormality diagnostic device includes: a device that an device that models a system extending from a fuel injection valve to the air-fuel ratio sensor by using a first order response delay element and a waste time element, and that identifies at least a waste time of the waste time element based on an input given to the air-fuel ratio sensor and an output obtained from the air-fuel ratio sensor; and another device that performs determination about an abnormality of the waste time based on the identified waste time.

摘要翻译： 提供一种用于检测内燃机的排气的空燃比的空燃比传感器的异常诊断装置。 异常诊断装置包括：装置，其通过使用一级响应延迟元件和废物时间元素对从燃料喷射阀延伸到空燃比传感器的系统进行建模，并且至少识别废物时间 基于对空燃比传感器的输入和从空燃比传感器获得的输出的废物时间要素; 以及基于所识别的浪费时间来执行关于废弃时间的异常的确定的另一装置。

公开(公告)号：US09194316B2

公开(公告)日：2015-11-24

申请号：US13612310

申请日：2012-09-12

申请人： Hiroshi Miyamoto ,  Yasushi Iwazaki ,  Shuntaro Okazaki ,  Kenji Suzuki

发明人： Hiroshi Miyamoto ,  Yasushi Iwazaki ,  Shuntaro Okazaki ,  Kenji Suzuki

IPC分类号： G06F7/00 ,  G06F17/00 ,  F02D41/00 ,  F02D41/14

CPC分类号： F02D41/0085 ,  F02D41/1443 ,  F02D41/1454 ,  F02D41/1456 ,  F02D41/1495

摘要： An inter-cylinder air-fuel ratio imbalance determining apparatus for an internal combustion engine includes an air-fuel ratio sensor; fuel injection valves; an instructed fuel injection amount control unit; and an imbalance determination unit configured: to acquire a time-differential-value corresponding value that is an amount of change per predetermined time in an output value of the sensor or a detected air-fuel ratio represented by the output value; to acquire a positive gradient corresponding value based on a positive value of the time-differential-value corresponding value; to acquire a negative gradient corresponding value based on a negative value of the time-differential-value corresponding value; to determine an imbalance determination threshold based on a magnitude of a ratio of the negative gradient corresponding value to the positive gradient corresponding value; and to determine whether inter-cylinder air-fuel ratio imbalance has occurred by comparing a magnitude of the negative gradient corresponding value with the imbalance determination threshold.

摘要翻译： 用于内燃机的气缸间空燃比不平衡确定装置包括空燃比传感器; 燃油喷射阀; 指示燃料喷射量控制单元; 以及不平衡确定单元，被配置为获取作为所述传感器的输出值中的每预定时间的变化量的时间微分值对应值或由所述输出值表示的检测到的空燃比; 基于时间微分值对应值的正值来获取正梯度对应值; 基于时间 - 微分值对应值的负值来获取负梯度对应值; 基于负梯度对应值与正梯度对应值的比值的大小来确定不平衡确定阈值; 并且通过将负梯度对应值的大小与不平衡确定阈值进行比较来确定是否发生了缸间空燃比不平衡。

公开(公告)号：US20140309907A1

公开(公告)日：2014-10-16

申请号：US14223418

申请日：2014-03-24

申请人： Yasushi Iwazaki ,  Kenji Suzuki

发明人： Yasushi Iwazaki ,  Kenji Suzuki

IPC分类号： F02D41/30

CPC分类号： F02D41/1454 ,  F02D41/0085

摘要： When two abnormal cylinders are causing variation abnormality, these abnormal cylinders are identified. A parameter correlated with a degree of fluctuation of output from an air-fuel ratio sensor installed in an exhaust passage common to a plurality of cylinders is calculated. Based on the calculated parameter, inter-cylinder air-fuel ratio variation abnormality is detected. The following steps are carried out: (A) a step of forcibly changing amounts of fuel injected for two of the plurality of cylinders and calculating the parameter, (B) a step of changing the two cylinders to other two cylinders and repeating the step (A), and (C) a step of identifying two cylinders causing variation abnormality based on a plurality of the parameters calculated in the steps (A) and (B).

摘要翻译： 当两个异常气缸引起变异异常时，会识别这些异常气瓶。 计算与安装在多个气缸共用的排气通道中的空燃比传感器的输出的波动程度相关的参数。 基于计算出的参数，检测到缸间空燃比变化异常。 执行以下步骤：（A）强制改变为多个气缸中的两个气缸喷射的燃料量并计算参数的步骤，（B）将两个气缸改变为其他两个气缸的步骤，并重复步骤 （A）和（C）基于在步骤（A）和（B）中计算出的多个参数来识别引起变异异常的两个气缸的步骤。