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公开(公告)号：US20070028596A1
公开(公告)日：2007-02-08
申请号：US11543191
申请日：2006-10-05
申请人： Yutaka Takaku , Toshio Ishii
发明人： Yutaka Takaku , Toshio Ishii
CPC分类号： F02D41/1441 , F01N3/22 , F01N11/00 , F01N11/007 , F01N2550/02 , F01N2550/14 , F02D35/003 , F02D41/1498 , F02D41/221 , F02D2200/0402 , F02D2200/1015 , Y02T10/40 , Y02T10/47
摘要： A diagnostic equipment for an exhaust gas cleaning apparatus installed for an engine, comprising a misfire detector which detects the misfire of the engine, and a secondary-air-system failure detector which detects the failure of a secondary air system. An index corrector corrects a deterioration index calculated by a deterioration-index calculator, in accordance with the detected result of the detector. A deterioration decision unit decides if the diagnostic equipment has failed, by the use of the corrected deterioration index. In a case where the extent of the misfire or the like is severe, a decision interrupter interrupts the decision of the deterioration decision unit. Thus, even when the misfire of the engine or the failure of the secondary air system has occurred, the detection of the deterioration of a catalyst does not err. It is therefore avoided to erroneously replace the catalyst which has not deteriorated yet, or to run the engine in spite of the deterioration of the catalyst.
摘要翻译： 一种用于发动机安装的废气净化装置的诊断装置，包括检测发动机失火的失火检测器和检测二次空气系统故障的二次空气系统故障检测器。 索引校正器根据检测器的检测结果来校正由劣化指数计算器计算出的劣化指数。 恶化判定单元通过使用校正后的劣化指数来决定诊断设备是否失败。 在失火等的程度严重的情况下，决策中断器中断劣化判定单元的判定。 因此，即使发动机失火或二次空气系统发生故障，催化剂劣化的检测也不会发生错误。 因此，尽管催化剂劣化，但是也可以避免错误地更换尚未劣化的催化剂或运行发动机。
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公开(公告)号：US06408617B1
公开(公告)日：2002-06-25
申请号：US09983476
申请日：2001-10-24
申请人： Yutaka Takaku , Toshio Ishii
发明人： Yutaka Takaku , Toshio Ishii
IPC分类号： F01N300
CPC分类号： F02D41/1441 , F01N3/22 , F01N11/00 , F01N11/007 , F01N2550/02 , F01N2550/14 , F02D35/003 , F02D41/1498 , F02D41/221 , F02D2200/0402 , F02D2200/1015 , Y02T10/40 , Y02T10/47
摘要： A diagnostic equipment for an exhaust gas cleaning apparatus installed for an engine, comprising a misfire detector which detects the misfire of the engine, and a secondary-air-system failure detector which detects the failure of a secondary air system. An index corrector corrects a deterioration index calculated by a deterioration-index calculator, in accordance with the detected result of the detector. A deterioration decision unit decides if the diagnostic equipment has failed, by the use of the corrected deterioration index. In a case where the extent of the misfire or the like is severe, a decision interrupter interrupts the decision of the deterioration decision unit. Thus, even when the misfire of the engine or the failure of the secondary air system has occurred, the detection of the deterioration of a catalyst does not err. It is therefore avoided to erroneously replace the catalyst which has not deteriorated yet, or to run the engine in spite of the deterioration of the catalyst.
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公开(公告)号：US06330510B1
公开(公告)日：2001-12-11
申请号：US09372984
申请日：1999-08-12
申请人： Yutaka Takaku , Toshio Ishii , Toshiharu Nogi
发明人： Yutaka Takaku , Toshio Ishii , Toshiharu Nogi
IPC分类号： G06F1900
CPC分类号： F02D41/221 , F02D2041/389
摘要： A diagnosing system for an engine diagnoses malfunctions that occur in a direct-injection engine in which fuel is injected into combustion chambers or a lean-burn engine. The present invention provides a diagnosing system for an engine capable of diagnosing malfunctions in an intake air flow intensifying component and a fuel supply component and of specifying a malfunctioning part without being affected by the difference between different engines, the difference in quality between parts and aging. The diagnosing system for an engine comprises: a selecting component for selecting either a first air-fuel mixture control component or a second air-fuel mixture control component according to operating condition of an engine; a combustion condition detecting component for detecting combustion condition of the engine; and decision component for deciding a malfunction on the basis of a first combustion condition detected by the combustion condition detecting component in a state where the first air-fuel mixture control component is selected by the selecting component, and a second combustion condition detected by the combustion condition detecting component in a state where the second air-fuel mixture control component is selected by the selecting component.
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4.发明授权
公开(公告)号：US5945828A
公开(公告)日：1999-08-31
申请号：US42558
申请日：1998-03-17
申请人： Kozo Katogi , Toshio Ishii , Yutaka Takaku
发明人： Kozo Katogi , Toshio Ishii , Yutaka Takaku
IPC分类号： G01M15/04 , F02D35/02 , F02D41/14 , F02D41/22 , F02D45/00 , F02P17/12 , F02P17/00 , G01M15/00
CPC分类号： F02D41/222 , F02D35/021 , F02D35/023 , F02D2041/2093 , F02D2200/1015 , F02D41/1498 , Y02T10/40
摘要： A failure of a detecting circuit such as an ion current detecting circuit for detecting a combustion condition of an engine can be diagnosed at a stage for detecting a combustion condition by a combustion condition detecting apparatus equipped with a malfunction diagnosing apparatus. The engine combustion condition detecting apparatus equipped with the malfunction diagnosing apparatus is arranged by a sensing circuit for sensing an ion current flowing through a combustion chamber, a misfire judging means for judging misfire occurred in the engine in response to the detection signal derived from the sensing circuit, and a malfunction judging means for judging malfunction of the sensing circuit.
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5.发明授权
公开(公告)号：US5758491A
公开(公告)日：1998-06-02
申请号：US651558
申请日：1996-05-22
CPC分类号： F01N11/007 , F01N13/009 , F01N2550/02 , Y02T10/47
摘要： A diagnosing system of a catalytic converter in an internal combustion engine has a detecting unit to detect an operating state of the engine and an air/fuel ratio control unit to adjust a fuel injection amount so as to keep an air/fuel ratio of a mixture that is inhaled into the engine to a target value. The operating state of the engine is detected, whereby it is confirmed that the engine lies in a predetermined operating region to execute a catalyst diagnosis on the basis of the detected operating state. In each of a plurality of different catalyst diagnosis regions, the performance of the catalytic converter or the performance of the catalytic converter array is diagnosed on the basis of the output signal of the first exhaust gas component sensor arranged on the upstream side of the catalytic converter array and the output signal of the second exhaust gas component sensor arranged on the downstream side.
摘要翻译： 内燃机中的催化转化器的诊断系统具有检测发动机的运转状态的检测单元和空燃比控制单元，以调节燃料喷射量，以保持混合气体的空气/燃料比 这被吸入发动机到目标值。 检测发动机的运转状态，由此确认发动机位于规定的运转区域，以根据检测到的运转状态进行催化剂诊断。 在多个不同的催化剂诊断区域的每一个中，催化转化器的性能或者催化转化器阵列的性能基于布置在催化转化器的上游侧的第一排气分量传感器的输出信号来诊断 阵列和布置在下游侧的第二排气分量传感器的输出信号。
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6.发明授权System for diagnosing engine exhaust gas purifying device and system for diagnosing sensor 失效用于诊断发动机废气净化装置的系统和用于诊断传感器的系统
公开(公告)号：US5341642A
公开(公告)日：1994-08-30
申请号：US994344
申请日：1992-12-21
CPC分类号： G01M15/104 , F01N11/007 , F01N2550/02 , Y02T10/47
摘要： A system which is capable of diagnosing the deterioration condition of an engine exhaust gas purifying device has front and rear air/fuel ratio sensors for detecting the air/fuel ratio of the exhaust gas upstream and downstream of the catalyst, an autocorrelation function calculation for calculating the autocorrelation function .phi.xx of an output signal from the front air/fuel ratio sensor to output the maximum values (.phi.xx)max of the autocorrelation function .phi.xx at predetermined intervals, each maximum value (.phi.xx)max being in each of the predetermined intervals. A cross-correlation function calculator calculates the cross-correlation function .phi.xy between the output signals from the front and rear air/fuel ratio sensors to output the maximum values (.phi.xy)max of the mutual correlation function .phi.xy at predetermined intervals, each maximum value (.phi.xy)max being in each of the predetermined intervals therefore. The ratios between the maximum values (.phi.xy)max and (.phi.xx)max (successive deterioration index .PHI..sub.i) are calculated to determine the deterioration condition of the catalyst by comparing the ratio with a predetermined reference value.
摘要翻译： 能够诊断发动机废气净化装置的劣化状态的系统具有前后空气/燃料比传感器，用于检测催化剂上游和下游的排气的空燃比，计算自相关函数 输出来自前方空气/燃料比传感器的输出信号的自相关函数phi xx，以预定间隔输出自相关函数phi xx的最大值（phi xx）max，每个最大值（phi xx）max分别为 预定间隔。 互相关函数计算器计算来自前后空气/燃料比传感器的输出信号之间的互相关函数phi xy，以预定间隔输出相互关联函数phi xy的最大值（phi xy）max，每个 因此，在每个预定间隔中的最大值（phi xy）max。 计算最大值（phi xy）max和（phi xx）max（连续劣化指数PHI i）之间的比率，以通过将比率与预定参考值进行比较来确定催化剂的劣化条件。
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公开(公告)号：US06520168B2
公开(公告)日：2003-02-18
申请号：US09800660
申请日：2001-03-08
申请人： Toshio Ishii , Yutaka Takaku
发明人： Toshio Ishii , Yutaka Takaku
IPC分类号： F02B7508
CPC分类号： F02D41/1441 , F02D41/1455 , F02D41/1456 , F02D41/1477 , F02D2041/1409 , F02D2041/1422 , F02D2041/1432
摘要： An air-fuel ratio correction coefficient calculating component is provided to an air-fuel ratio controller for an engine having the wide range air-fuel ratio sensor. In order to compensate for a time lag in detection of an air-fuel ratio detected by the wide range air-fuel ratio sensor from the time when a mixed gas of the air-fuel ratio is supplied to the engine, the air-fuel ratio controller includes a component for calculating an air-fuel ratio correction coefficient to control an amount of fuel supplied to the engine based on an output signal of the air-fuel ratio sensor. The air-fuel ratio correction coefficient calculating component calculates the air-fuel ratio correction coefficient based on a nonlinear calculation element. The non-linear calculation element has an ON-OFF characteristic, a neutral zone characteristic, a saturation characteristic or a characteristic combining a plurality of characteristics selected from the above-mentioned characteristics.
摘要翻译： 空燃比校正系数计算部件设置在具有宽范围空燃比传感器的发动机的空燃比控制装置中。 为了补偿从空燃比的混合气体向发动机供给时的宽范围空燃比传感器检测出的空燃比的检测时间滞后，空燃比 控制器包括用于根据空燃比传感器的输出信号计算空燃比校正系数以控制供给发动机的燃料量的部件。 空燃比校正系数计算部件基于非线性计算元件来计算空燃比校正系数。 非线性计算元件具有ON-OFF特性，中性区特性，饱和特性或组合从上述特性中选出的多个特性的特性。
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公开(公告)号：US06324836B1
公开(公告)日：2001-12-04
申请号：US09592852
申请日：2000-06-12
IPC分类号： F01N300
CPC分类号： F02D41/1479 , F02D41/1441 , F02D41/1456
摘要： If the output of an O2 sensor located downstream of a catalyst deviates from a predetermined range, the air-to-fuel ratio upstream of the catalyst is over-corrected to be a leaner value or a richer value beyond the predetermined purification-efficiency range when the output of the O2 sensor downstream of the catalyst indicates rich or lean, respectively, so that the output of the O sensor downstream of the catalyst returns within a predetermined range as soon as possible.
摘要翻译： 如果位于催化剂下游的O2传感器的输出偏离预定范围，则催化剂上游的空燃比被过度校正为超过预定净化效率范围的更稀的值或更丰富的值， 催化剂下游的O 2传感器的输出分别表示浓或稀，使得催化剂下游的O传感器的输出尽可能快地返回到预定范围内。
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9.发明授权
公开(公告)号：US6092368A
公开(公告)日：2000-07-25
申请号：US808834
申请日：1997-02-28
申请人： Toshio Ishii , Toshio Manaka , Yutaka Takaku , Kiyoshi Miura
发明人： Toshio Ishii , Toshio Manaka , Yutaka Takaku , Kiyoshi Miura
CPC分类号： F01N11/00 , F01N2550/02 , Y02T10/47
摘要： In a diagnostic system for an exhaust gas purifying apparatus in an internal combustion engine, such as a diagnostic system suitable for evaluating the exhaust gas purifying performance of a specific component, as an exhaust gas component concentration corresponding to an operating condition of the engine or an operating condition of the catalyst is detected using an exhaust gas component system, and the evaluation and diagnosis of the exhaust gas purifying apparatus are conducted on the basis of the thus-detected value directly or after subjecting it to an integral processing. With such a diagnostic system, it is not necessary to dispose a sensor upstream of the catalyst in the exhaust gas purifying apparatus, for diagnosis of the catalyst, thus permitting the system to be less expensive, highly durable and afford a high diagnostic accuracy according to operating conditions.
摘要翻译： 在内燃机的排气净化装置的诊断系统中，例如适用于评价特定部件的排气净化性能的诊断系统，作为与发动机的运转状态对应的排气成分浓度， 使用废气成分系统检测催化剂的运转状态，并且基于这样检测的值直接进行排气净化装置的评价和诊断，或对其进行整体处理。 通过这样的诊断系统，不需要在废气净化装置中将催化剂上游设置在催化剂的诊断中，从而允许系统更便宜，高度耐用，并且根据 运行条件。
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公开(公告)号：US6085132A
公开(公告)日：2000-07-04
申请号：US187529
申请日：1998-11-06
申请人： Toshio Ishii , Takashi Mukaihira , Yutaka Takaku , Kazuya Kawano , Kiyoshi Miura
发明人： Toshio Ishii , Takashi Mukaihira , Yutaka Takaku , Kazuya Kawano , Kiyoshi Miura
IPC分类号： F01N3/20 , B60W50/02 , F01N3/22 , F02D17/04 , F02D41/14 , F02D41/16 , F02D41/18 , F02D41/22 , F02D41/26 , F02D43/00 , F02D45/00 , F02M25/07 , F02M25/08 , F02P5/15 , G06F7/00
CPC分类号： F02D41/266 , F02D41/22 , B60W2050/021 , F02D2041/227
摘要： A diagnostic and control system first checks the current operation status of the vehicle engine, when a malfunction or abnormal condition is detected by diagnostic sensors. A selection of optimum corrective measures is then made and carried out taking into account the safety of the vehicle, based on current operational status of the engine. For this purpose, a set of prioritized corrective measures is determined beforehand for each of the individual monitored items, according to detected changes in the engine operating status. The individual control measures are selected considering the safety of the vehicle, possible measures to correct the malfunction, assuring vehicle operability, and maintaining appropriate engine operating parameters such as exhaust gas mixture, fuel consumption and the like.
摘要翻译： 当诊断传感器检测到故障或异常情况时，诊断和控制系统首先检查车辆发动机的当前运行状态。 然后根据发动机的当前运行状态，考虑到车辆的安全性，进行最佳的纠正措施的选择。 为此，根据检测到的发动机运行状态的变化，预先确定针对每个被监视项目的一组优先排序的校正措施。 考虑到车辆的安全性，可能的措施来纠正故障，确保车辆的可操作性以及维持诸如废气混合物，燃料消耗等的适当的发动机操作参数，来选择单独的控制措施。
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