公开(公告)号：US06357224B1

公开(公告)日：2002-03-19

申请号：US09592677

申请日：2000-06-12

申请人： Shigeru Kawamoto ,  Yutaka Takaku ,  Toshio Ishii ,  Yoshihisa Fujii ,  Shinji Nakagawa ,  Minoru Oosuga

发明人： Shigeru Kawamoto ,  Yutaka Takaku ,  Toshio Ishii ,  Yoshihisa Fujii ,  Shinji Nakagawa ,  Minoru Oosuga

IPC分类号： F01N300

CPC分类号： F01N3/0842 ,  F01N11/007 ,  F01N2550/03 ,  F02B23/101 ,  F02B2075/125 ,  F02D41/0275 ,  F02D41/1441 ,  Y02T10/24 ,  Y02T10/47

摘要： The invention provides a method of controlling an air-fuel ratio and for diagnosing a deterioration of a catalyst having an NOx trapping agent in an internal combustion engine. An exhaust gas purifying apparatus having an NOx trapping agent arranged within an exhaust gas passage, an air-fuel ratio changing means temporarily changing the air-fuel ratio of the exhaust gas from the lean to the stoichiometric or rich air-fuel ratio at a predetermined cycle, a particular component detecting means detecting a particular component in the exhaust gas downstream the NOx trapping agent, a NOx discharge or reduction completion judging means, and NOx discharge or reduction completion time detecting means detecting a time required for purifying the NOx.

摘要翻译： 本发明提供一种控制空燃比并且用于诊断在内燃机中具有NOx捕集剂的催化剂的劣化的方法。 一种排气净化装置，其具有配置在排气通路内的NOx捕集剂，空燃比变更单元将预定的排气的空燃比暂时地从所述稀薄变化为理论空燃比， 循环，检测NOx捕集剂下游的废气中的特定成分的特​​定成分检测装置，NOx排放或还原完成判定装置，以及NOx排放或还原完成时间检测装置，其检测净化NOx所需的时间。

公开(公告)号：US06305361B1

公开(公告)日：2001-10-23

申请号：US09538273

申请日：2000-03-30

申请人： Yutaka Takaku ,  Toshio Ishii ,  Kazuya Kawano ,  Nobuo Kurihara ,  Hiroshi Kimura ,  Kiyoshi Miura

发明人： Yutaka Takaku ,  Toshio Ishii ,  Kazuya Kawano ,  Nobuo Kurihara ,  Hiroshi Kimura ,  Kiyoshi Miura

IPC分类号： F02M3302

CPC分类号： F02M25/0809

摘要： There is disclosed a leakage diagnosis of an evaporative system in an internal combustion engine, and more particularly there is disclosed an evaporative system in which a more accurate leakage diagnosis can be effected using a change in the pressure in the evaporative system, and such a diagnosis method is also disclosed. The evaporative system includes a gauge line having a gauge valve, which gauge line branches off from an evaporative gas line or an evaporative gas purge line, and communicates with a point upstream of an engine throttle valve or with the ambient atmosphere, a pressure sensor for detecting the pressure in the evaporative system, and a purge valve. A leakage diagnosis of this system is effected based on detected values of the pressure sensor obtained by opening and closing the purge valve and the gauge valve. Therefore, accurate results of the diagnosis can be obtained.

摘要翻译： 公开了内燃机中的蒸发系统的泄漏诊断，更具体地，公开了一种蒸发系统，其中可以使用蒸发系统中的压力变化来实现更准确的泄漏诊断，并且这种诊断 还公开了方法。 蒸发系统包括具有计量阀的计量管，该计量管从蒸发气体管线或蒸发气体吹扫管线分支，并与发动机节气门或与大气环境的上游点连通，压力传感器用于 检测蒸发系统中的压力和净化阀。 基于通过打开和关闭吹扫阀和量规阀获得的压力传感器的检测值来实现该系统的泄漏诊断。 因此，可以获得准确的诊断结果。

公开(公告)号：US6050087A

公开(公告)日：2000-04-18

申请号：US109171

申请日：1998-07-02

申请人： Nobuo Kurihara ,  Hiroshi Kimura ,  Yutaka Takaku ,  Toshio Ishii

发明人： Nobuo Kurihara ,  Hiroshi Kimura ,  Yutaka Takaku ,  Toshio Ishii

IPC分类号： F02D45/00 ,  F01N3/20 ,  F01N9/00 ,  F01N11/00 ,  F02D41/14 ,  F01N3/00

CPC分类号： F01N9/005 ,  F01N11/005 ,  F01N11/007 ,  F01N2550/02 ,  F02D2200/0804 ,  Y02T10/47

摘要： A diagnosis apparatus for diagnosing a catalystic converter of a motor vehicle as to whether the catalyst suffers deterioration by estimating a temperature of the catalyst or that of the exhaust gas in the vicinity of the catalyst on the basis of a plurality of engine parameters to thereby decide deterioration of the catalyst by using as an index the estimated temperature. The apparatus includes a unit for estimating the temperature of the catalyst in a steady state by making use of an engine speed and an engine load which represent typical parameters employed in fuel injection control of the engine. The steady-state temperature facility is realized by storing the engine speeds and the engine loads obtained experimentally in the steady state operation of the engine in the form of a two-dimensional data map. A unit for correcting the estimated temperature of the catalyst in the transient state is provided for correcting the catalyst temperature determined by the steady-state catalyst temperature estimating unit to thereby ensure correct estimation of the catalyst temperature even in the course of operation of the motor vehicle. In the transient temperature estimating unit, non-linear characteristics are each described by combining a plurality of linear characteristics. A unit for estimating the temperature of the catalyst on the basis of the value determined by the steady-state temperature estimating unit and the transient-state temperature estimating unit is provided to decide deterioration of the catalyst.

摘要翻译： 一种用于诊断机动车辆的催化剂转化器的诊断装置，其基于多个发动机参数来估计催化剂的温度或者催化剂附近的排气的温度，从而决定催化剂是否发生劣化 通过使用估计温度作为指标，催化剂的劣化。 该装置包括用于通过利用表示在发动机的燃料喷射控制中使用的典型参数的发动机转速和发动机负荷来估计稳定状态下的催化剂的温度的单元。 稳态温度设备通过将发动机转速和实验获得的发动机负载以二维数据图的形式存储在发动机的稳态运行中来实现。 提供用于校正催化剂在过渡状态下的估计温度的单元，用于校正由稳态催化剂温度估计单元确定的催化剂温度，从而即使在机动车辆的操作过程中也能够正确地估计催化剂温度 。 在瞬态温度估计单元中，通过组合多个线性特性来分别描述非线性特性。 提供基于由稳态温度推定单元和瞬态温度推定单元确定的值来估计催化剂温度的单元，以确定催化剂的劣化。

公开(公告)号：US5241480A

公开(公告)日：1993-08-31

申请号：US638452

申请日：1991-01-04

申请人： Yutaka Takaku ,  Mineo Kashiwaya ,  Toshio Ishii ,  Naoyuki Tanaka

发明人： Yutaka Takaku ,  Mineo Kashiwaya ,  Toshio Ishii ,  Naoyuki Tanaka

IPC分类号： F02D41/00 ,  F02D41/14 ,  F02D41/34 ,  G01M15/11

CPC分类号： F02D41/1497 ,  G01M15/11 ,  F02D41/008

摘要： A method and apparatus for detecting the quality of combustion in each cylinder of a multi-cylinder internal combustion engine is disclosed. The invention determines a combustion stroke of each cylinder by sensors and detects the rotational speed of the engine at least three times during each combustion stroke by a rotation speed calculation device. The detected rotational speeds are evaluated by an arithmetic calculation device to identify the variation in rotational speed of each piston during a combustion stroke whereby the quality of combustion is, thus, determined. In a feature of the invention fluctuations in rotational speed caused by reciprocating inertia (.omega..sub.c) are calculated and eliminated from fluctuation in engine speed caused by combustion (.omega..sub.g) so that the quality of combustion based only upon variation in detected speeds caused by combustion is derived.

公开(公告)号：US07389637B2

公开(公告)日：2008-06-24

申请号：US11543191

申请日：2006-10-05

申请人： Yutaka Takaku ,  Toshio Ishii

发明人： Yutaka Takaku ,  Toshio Ishii

IPC分类号： F01N3/00

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。

公开(公告)号：US07117664B2

公开(公告)日：2006-10-10

申请号：US10922868

申请日：2004-08-23

申请人： Yutaka Takaku ,  Toshio Ishii

发明人： Yutaka Takaku ,  Toshio Ishii

IPC分类号： F01N3/00

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.

公开(公告)号：US06725709B2

公开(公告)日：2004-04-27

申请号：US10000356

申请日：2001-12-05

申请人： Yutaka Takaku ,  Toshio Ishii ,  Nobuo Kurihara ,  Hiroshi Kimura

发明人： Yutaka Takaku ,  Toshio Ishii ,  Nobuo Kurihara ,  Hiroshi Kimura

IPC分类号： G01M1900

CPC分类号： G01M15/11

摘要： A combustion state is diagnoses by extracting specific rotation period component of a period synchronous with rotation from a combustion state parameter for at least two rotations. The combustion state is judged on the basis of the extracted specific rotation period component. The combustion state parameter may be the engine speed or the output torque of a multiple-cylinder engine which varies according to the combustion state of the engine.

摘要翻译： 通过从用于至少两次旋转的燃烧状态参数提取与旋转同步的周期的特定旋转周期分量来诊断燃烧状态。 基于所提取的特定旋转周期分量来判断燃烧状态。 燃烧状态参数可以是根据发动机的燃烧状态而变化的多缸发动机的发动机转速或输出转矩。

公开(公告)号：US06383267B1

公开(公告)日：2002-05-07

申请号：US09592678

申请日：2000-06-12

申请人： Yutaka Takaku ,  Shigeru Kawamoto ,  Yoshihisa Fujii ,  Shinji Nakagawa ,  Toshio Ishii ,  Minoru Ohsuga

发明人： Yutaka Takaku ,  Shigeru Kawamoto ,  Yoshihisa Fujii ,  Shinji Nakagawa ,  Toshio Ishii ,  Minoru Ohsuga

IPC分类号： B01D5304

CPC分类号： F01N3/0842 ,  F01N11/007 ,  F01N2550/03 ,  F01N2900/0422 ,  F02B23/101 ,  F02B2075/125 ,  F02D41/0275 ,  F02D41/1441 ,  F02D2200/0806 ,  F02D2200/0816 ,  Y02C20/10 ,  Y02T10/24 ,  Y02T10/47 ,  Y10S55/10 ,  Y10S55/30

摘要： An exhaust gas cleaning system for an engine capable of judging the amount of trapped NOx and the oxygen storage capacity of an NOx trap agent and which can diagnose the deterioration of the NOx trap agent. The NOx trap is arranged in an exhaust gas passage and the air-fuel ratio of the exhaust gas is temporally changed from a lean air-fuel ratio to the stoichiometric air-fuel ratio or a rich air-fuel ratio with a predetermined cycle. The NOx trapping occurs by absorbing or adsorbing NOx in the exhaust gas when an air-fuel ratio of the exhaust gas is a lean air-fuel ratio and by releasing or reducing NOx when the air-fuel ratio is a rich air-fuel ratio. The amount of trapped NOx is judged from the oxygen concentration and the oxygen concentration in the exhaust gas is detected in the exhaust gas passage in the downstream side of the NOx trap and determined by taking the oxygen storage capacity when the air-fuel ratio of the exhaust gas changes to the stoichiometric air-fuel ratio or the rich air-fuel ratio.

摘要翻译： 一种能够判断捕集NOx的量和NOx捕集剂的储氧能力并能够诊断NOx捕集剂的劣化的发动机的废气净化系统。 NOx捕集器设置在排气通路中，并且将废气的空燃比时间性地从稀空燃比变化到理论空燃比或浓空燃比，并具有规定的循环。 当排气的空燃比是稀空燃比时，通过吸收或吸附废气中的NOx，并且当空燃比浓空燃比时，通过释放或还原NOx，发生NOx捕集。 从氧浓度判定捕获的NOx的量，并且在NOx捕集器的下游侧的排气通路中检测废气中的氧浓度，并且通过在空气燃料比为 排气变为化学计量空燃比或浓空燃比。

公开(公告)号：US06343500B1

公开(公告)日：2002-02-05

申请号：US09365884

申请日：1999-08-03

申请人： Kozo Katogi ,  Toshio Ishii ,  Yutaka Takaku

发明人： Kozo Katogi ,  Toshio Ishii ,  Yutaka Takaku

IPC分类号： G01M1500

CPC分类号： F02D41/222 ,  F02D35/021 ,  F02D35/023 ,  F02D41/1498 ,  F02D2041/2093 ,  F02D2200/1015 ,  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.

摘要翻译： 在具有故障诊断装置的燃烧条件检测装置的检测燃烧状态的阶段，可以诊断用于检测发动机燃烧状态的离子电流检测电路等检测电路的故障。 配备有故障诊断装置的发动机燃烧条件检测装置由用于感测流过燃烧室的离子电流的感测电路布置，用于根据从感测得到的检测信号来判断发动机中的失火的失火判定装置 电路，以及用于判断感测电路的故障的故障判断装置。

公开(公告)号：US06286494B1

公开(公告)日：2001-09-11

申请号：US09365812

申请日：1999-08-02

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. The air-fuel ratio correction coefficient calculating component can accommodate 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. For this purpose, an air-fuel ratio controller for an engine is accordance with the present invention provided, having a wide range air-fuel ratio sensor for outputting a signal corresponding to an air-fuel ratio of an exhaust gas; and 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, wherein the air-fuel ratio correction coefficient calculating component calculates the air-fuel ratio correction coefficient based on a non-linear calculation element that has an ON-OFF characteristic, a neutral zone characteristic, a saturation characteristic or a characteristic combining a plurality of characteristics selected frm 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。 空燃比校正系数计算部件能够适应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时间滞后 。 为此，根据本发明，本发明提供一种具有宽范围的空燃比传感器，用于输出对应于排气的空燃比的信号; 以及基于所述空燃比传感器的输出信号来计算空燃比校正系数以控制供给到所述发动机的燃料量的分量，其中所述空燃比校正系数计算部件计算所述空燃比 基于具有ON-OFF特性，中性区特性，饱和特性或组合选择的多个特性的特性的非线性计算元件的比率校正系数。