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1. 发明申请

US20110054761A1 CYLINDER-TO-CYLINDER AIR/FUEL RATIO IMBALANCE DETERMINATION SYSTEM OF INTERNAL COMBUSTION ENGINE 有权
标题翻译：内燃机气缸排气量/燃油比重测定系统
公开(公告)号：US20110054761A1
公开(公告)日：2011-03-03
申请号：US12847300
申请日：2010-07-30
申请人： Hiroshi SAWADA , Yasushi Iwazaki , Hiroshi Miyamoto , Fumihiko Nakamura
发明人： Hiroshi SAWADA , Yasushi Iwazaki , Hiroshi Miyamoto , Fumihiko Nakamura
IPC分类号： F02D41/30
CPC分类号： F02D41/0085 , F02D41/1441 , F02D41/1475
摘要： A cylinder-to-cylinder air/fuel ratio imbalance determination system obtains an imbalance determination parameter that increases or decreases as a difference between the air/fuel ratios of different cylinders increases, based on output values of an air/fuel ratio sensor, and makes a cylinder-to-cylinder A/F imbalance determination, based on the result of comparison between the imbalance determination parameter and a threshold value for imbalance determination. The determination system changes the amount of fuel injected into one or more of the cylinders so as to create a forced imbalance condition in which the air/fuel ratio of a particular cylinder deviates from the air/fuel ratio of the remaining cylinders, and obtains an air/fuel ratio sensor evaluation parameter (e.g., rate of change ΔAF of the detected air/fuel ratio) in this condition. Then, the determination system determines whether the air/fuel ratio sensor is adequate for making a cylinder-to-cylinder A/F imbalance determination, by comparing the evaluation parameter with a reference parameter (an evaluation parameter obtained based on output values of a reference air/fuel ratio sensor in the same forced imbalance condition).
摘要翻译：基于空/燃比传感器的输出值，气缸对气缸空气/燃料比不平衡确定系统获得不同气缸的空气/燃料比之间的差异增大或减小的不平衡确定参数，并且基于不平衡确定参数和不平衡确定的阈值之间的比较结果，确定缸到缸的A / F不平衡。确定系统改变喷射到一个或多个气缸中的燃料量，以产生特定气缸的空气/燃料比偏离剩余气缸的空气/燃料比的强制不平衡状态，并获得在这种情况下，空气/燃料比传感器评估参数（例如，检测到的空气/燃料比的变化率和Dgr; AF）。然后，判定系统通过将评价参数与参考参数（基于参考的输出值获得的评估参数）进行比较来判定空气/燃料比传感器是否足以进行气缸到气缸A / F不平衡的确定空气/燃料比传感器处于相同的强制不平衡状态）。

2. 发明申请

US20100211290A1 ABNORMALITY DIAGNOSTIC DEVICE AND ABNORMALITY DIAGNOSTIC METHOD FOR MULTICYLINDER INTERNAL COMBUSTION ENGINE 审中-公开
标题翻译：非线性诊断装置和多中心内燃机异常诊断方法
公开(公告)号：US20100211290A1
公开(公告)日：2010-08-19
申请号：US12706464
申请日：2010-02-16
申请人： Toru KIDOKORO , Hiroshi SAWADA , Yasushi IWAZAKI , Koichi KIMURA , Hiroshi MIYAMOTO , Fumihiko NAKAMURA , Keiji IMAMURA
发明人： Toru KIDOKORO , Hiroshi SAWADA , Yasushi IWAZAKI , Koichi KIMURA , Hiroshi MIYAMOTO , Fumihiko NAKAMURA , Keiji IMAMURA
IPC分类号： F02D41/30
CPC分类号： F02D41/1495 , F02D41/1408 , F02D41/1474 , F02D41/222
摘要： A fuel injection amount from fuel injection valves is actively controlled and an input air-fuel ratio is caused forcibly to oscillate. A system from the fuel injection valves to the air-fuel ratio sensor is simulated by a first order delay system, and a gain and time constant are identified on the basis of the input air-fuel ratio relating to the model and an output air-fuel ratio obtained from the air-fuel ratio sensor. The presence of an air-fuel ratio abnormal variation is diagnosed on the basis of whether or not the identified values of the gain and the time constant are less than a first and second predetermined values respectively.
摘要翻译：主动地控制来自燃料喷射阀的燃料喷射量，并且强制地引起输入空燃比的振荡。从燃料喷射阀到空燃比传感器的系统由一阶延迟系统模拟，并且基于与模型相关的输入空燃比和输出空气 - 燃料比传感器来识别增益和时间常数，从空燃比传感器获得的燃料比。基于增益和时间常数的识别值是否小于第一和第二预定值来诊断空燃比异常变化的存在。

3. 发明申请

US20090260347A1 APPARATUS AND METHOD FOR DETECTING ABNORMAL AIR-FUEL RATIO VARIATION AMONG CYLINDERS OF MULTI-CYLINDER INTERNAL COMBUSTION ENGINE 有权
标题翻译：用于检测多缸内燃机缸体异常空气 - 燃料比变化的装置和方法
公开(公告)号：US20090260347A1
公开(公告)日：2009-10-22
申请号：US12416262
申请日：2009-04-01
申请人： Yasushi IWAZAKI , Toru KIDOKORO , Hiroshi SAWADA , Keiji IMAMURA , Fumihiko NAKAMURA
发明人： Yasushi IWAZAKI , Toru KIDOKORO , Hiroshi SAWADA , Keiji IMAMURA , Fumihiko NAKAMURA
IPC分类号： F01N11/00 , F01N3/10
CPC分类号： F01N11/00 , F01N3/10 , F01N2550/02 , F01N2560/06 , Y02T10/47
摘要： An apparatus and a method for detecting abnormal air-fuel ratio variation among cylinders of a multi-cylinder internal combustion engine are provided. The apparatus includes: a catalyst that is provided in an exhaust passage of the multi-cylinder internal combustion engine; a catalyst temperature detection unit that detects a temperature of the catalyst; a catalyst temperature estimation unit that estimates a temperature of the catalyst based on an engine operating state; and an abnormality detection unit that determines whether abnormal air-fuel ratio variation among the cylinders has occurred based on the detected temperature of the catalyst and the estimated temperature of the catalyst.
摘要翻译：提供一种用于检测多缸内燃机的气缸之间的异常空燃比变动的装置和方法。该装置包括：设置在多气缸内燃机的排气通路中的催化剂; 催化剂温度检测单元，其检测催化剂的温度; 催化剂温度估计单元，其基于发动机运转状态来估计催化剂的温度; 以及异常检测单元，其基于检测到的催化剂的温度和催化剂的估计温度来判定是否发生了气缸之间的异常空燃比变动。

4. 发明申请

US20110283981A1 APPARATUS FOR ACQUIRING RESPONSIBILITY OF OXYGEN CONCENTRATION SENSOR 有权
标题翻译：获取氧气浓度传感器责任的设备
公开(公告)号：US20110283981A1
公开(公告)日：2011-11-24
申请号：US13090814
申请日：2011-04-20
申请人： Yusuke KAWAMURA , Takuya MATSUMOTO , Takashi NAKAMURA , Makoto SATO , Toru KIDOKORO , Hiroshi SAWADA , Yasushi IWAZAKI
发明人： Yusuke KAWAMURA , Takuya MATSUMOTO , Takashi NAKAMURA , Makoto SATO , Toru KIDOKORO , Hiroshi SAWADA , Yasushi IWAZAKI
IPC分类号： F02D28/00
CPC分类号： F02D41/1441 , F01N3/101 , F01N11/007 , F01N2560/025 , F02D41/0235 , F02D41/1456 , F02D41/1495 , F02D2041/1431 , F02D2200/0816 , Y02T10/22 , Y02T10/47
摘要： The fact that “with respect to a process in which the output value of a downstream air-fuel ratio sensor (sensor output value) is inverted from the minimum output value to the maximum output value during execution of an active control, the local maximum and minimum values of the secondary differential value of the sensor output value is widely affected by the size of the response delay of the downstream air-fuel ratio sensor and the size of the degree of the degradation of the three-way catalyst” is utilized. By preliminarily acquiring and memorizing, as maps, these relations obtained through an experiment, and applying the “local maximum and minimum values of the secondary differential value of the sensor output value” calculated from the transition of the sensor output value acquired during execution of the active control to the maps, the response delay (time constant) of the downstream air-fuel ratio sensor is acquired.
摘要翻译： “关于在执行主动控制期间下游空燃比传感器的输出值（传感器输出值）从最小输出值反转到最大输出值的过程的局部最大值和传感器输出值的二次微分值的最小值受下游空燃比传感器的响应延迟的大小和三元催化剂的劣化程度的大小的影响。通过预先获取并记忆通过实验获得的这些关系，并且应用从在执行期间获取的传感器输出值的转变计算出的“传感器输出值的二次微分值的局部最大值和最小值” 主动控制地图，获取下游空燃比传感器的响应延迟（时间常数）。

5. 发明申请

US20100154387A1 ABNORMALITY DETECTION DEVICE FOR REDUCTANT ADDITION VALVE 审中-公开
标题翻译：用于减少附加阀的异常检测装置
公开(公告)号：US20100154387A1
公开(公告)日：2010-06-24
申请号：US12340152
申请日：2008-12-19
申请人： Daisuke SHIBATA , Hiroshi SAWADA , Satoru MAEDA
发明人： Daisuke SHIBATA , Hiroshi SAWADA , Satoru MAEDA
IPC分类号： F01N9/00
CPC分类号： F01N3/0871 , F01N3/023 , F01N3/035 , F01N3/103 , F01N11/007 , F01N13/009 , F01N2550/05 , F01N2560/025 , F01N2560/14 , F01N2610/03 , F01N2900/1806 , F02B37/00 , Y02T10/20 , Y02T10/47
摘要： An addition valve is instructed to add a reductant (step 122). A cumulative specified addition amount is then determined (step 124). An air-fuel ratio A/Fcal is estimated in accordance with the operating status of an internal combustion engine (step 126). An estimated air-fuel ratio A/Fcal and air-fuel ratio sensor output A/Fs are used to determine a measured addition amount (Δt) at the current moment (step 128). A cumulative measured addition amount is then determined (step 130). The error between the measured addition amount and specified addition amount are compared against a reference value (step 134) to detect an abnormality in the addition valve.
摘要翻译：指示添加阀添加还原剂（步骤122）。然后确定累积指定的添加量（步骤124）。根据内燃机的运行状态来估计空燃比A / Fcal（步骤126）。使用估计的空燃比A / Fcal和空燃比传感器输出A / Fs来确定当前时刻的测量添加量（＆Dgr; t）（步骤128）。然后确定累积测量的添加量（步骤130）。将测定的添加量与规定的添加量之间的误差与参考值进行比较（步骤134），以检测加法阀的异常。

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