公开(公告)号：US5485374A

公开(公告)日：1996-01-16

申请号：US70226

申请日：1993-06-02

申请人： Yutaka Takaku ,  Toshio Ishii

发明人： Yutaka Takaku ,  Toshio Ishii

IPC分类号： F02D41/04 ,  F02D41/14 ,  F02D41/22 ,  F02D45/00 ,  F02P5/152 ,  F02P5/153 ,  G01M15/11 ,  G06F17/00

CPC分类号： G01M15/11 ,  F02D41/1401 ,  F02D41/22 ,  F02D2041/1415

摘要： A system for accurately diagnosing the combustion condition of a multicylinder engine from the fluctuation of revolution speeds among individual cylinders in a wide range of engine revolution speeds, comprising a functional pattern storage which stores therein a functional pattern on the fluctuational error of a combustion condition parameter corresponding to the variation of the revolution speeds; a learning unit which specifies the functional pattern on the basis of the revolution speeds and the combustion condition parameter successively for the respective cylinders while making corrections if necessary, and which evaluates the fluctuational error of the combustion condition parameter for the revolution speed of a predetermined one of the cylinders; and a correction unit which subtracts the evaluated fluctuational error from the combustion condition parameter for the predetermined cylinder, and which sets the difference of the subtraction as a new combustion condition parameter.

摘要翻译： 一种用于在多个发动机转速范围内的各个气缸之间的转速的波动中精确地诊断多缸发动机的燃烧状态的系统，包括功能模式存储器，其中存储有关燃烧条件参数的波动误差的功能模式 对应于转速的变化; 学习单元，如果需要，在进行校正的情况下，根据各个气缸的转速和燃烧条件参数，基于转速和燃烧条件参数来指定功能模式，并且对于预定的转速的燃料条件参数的波动误差进行评价 的气缸; 以及校正单元，其从所述预定气缸的燃烧条件参数中减去所评估的波动误差，并且将所述减法的差设置为新的燃烧条件参数。

公开(公告)号：US20050016160A1

公开(公告)日：2005-01-27

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： F01N3/20 ,  F01N3/22 ,  F01N11/00 ,  F02D35/00 ,  F02D41/14 ,  F02D41/22 ,  F02D45/00 ,  F02P17/12 ,  F01N3/00 ,  F01N7/00

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：US06523340B1

公开(公告)日：2003-02-25

申请号：US09499456

申请日：2000-02-07

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： F01N300

CPC分类号： F01N11/005 ,  F01N2550/02 ,  Y02T10/47

摘要： A diagnosis apparatus for diagnosing a catalytic 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. Diagnosing method and apparatus capable of diagnosing deterioration of the catalyst with a high reliability are realized.

摘要翻译： 一种用于诊断机动车辆的催化转化器的诊断装置，其特征在于，基于多个发动机参数，通过估计催化剂的温度或催化剂附近的排气的温度来判定催化剂是否发生劣化，从而决定 通过使用估计温度作为指标，催化剂的劣化。 实现能够高可靠性地诊断催化剂劣化的诊断方法和装置。

公开(公告)号：US06502388B2

公开(公告)日：2003-01-07

申请号：US09790688

申请日：2001-02-23

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

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

IPC分类号： F01N300

CPC分类号： F01N3/0842 ,  F01N11/00 ,  F01N11/007 ,  F01N2550/03 ,  F01N2900/0422 ,  F02D41/0057 ,  F02D41/0275 ,  F02D41/1441 ,  F02D2200/0806 ,  F02D2200/0816 ,  Y02T10/24 ,  Y02T10/47

摘要： An object of the present invention is to provide an engine exhaust gas cleaning system which can accurately judge whether or not there is the remaining capacity in an NOx trapping amount of an NOx trapping agent, can optimize the timing of NOx purge control, and can diagnose the deterioration of the NOx trapping agent. The present invention is characterized by an engine exhaust gas cleaning system comprising an operating control parameter changing means for changing operating control parameters of the engine in order to change an amount of NOx trapped to the NOx trapping agent; a concentration detecting means for detecting a concentration of a specified component in the exhaust gas at a position downstream of the NOx trapping agent; an air-fuel ratio changing means for temporarily changing the air-fuel ratio of the exhaust gas to a stoichiometric air-fuel ratio or a rich air-fuel ratio with a preset period; and an NOx trapping amount change detecting means for detecting change in the amount of NOx trapped to the NOx trapping agent based on change in a detected result of the concentration detecting means when the air-fuel ratio is changed after changing the operating control parameter.

摘要翻译： 本发明的目的是提供一种能够精确地判断NOx捕集剂的NOx捕集量是否存在剩余容量的发动机废气净化系统，能够优化NOx净化控制的定时，并且能够诊断 本发明的特征在于一种发动机废气净化系统，其包括操作控制参数改变装置，用于改变发动机的操作控制参数，以便改变捕获到NOx捕集剂的NOx的量; 浓度检测装置，用于检测在所述NOx捕集剂的下游位置处的排气中的特定成分的浓度; 空燃比改变装置，用于将预定期间的废气的空燃比临时改变为理论空燃比或浓空燃比; 以及NOx捕集量变化检测装置，用于当改变所述操作控制参数之后，当所述空燃比改变时，基于所述浓度检测装置的检测结果的变化来检测捕获到所述NOx捕集剂的NOx的量的变化。

公开(公告)号：US6089080A

公开(公告)日：2000-07-18

申请号：US990411

申请日：1997-12-15

申请人： Yutaka Takaku ,  Toshio Ishii ,  Kazuya Kawano

发明人： Yutaka Takaku ,  Toshio Ishii ,  Kazuya Kawano

IPC分类号： F02M25/08 ,  G01L3/26

CPC分类号： F02M25/0809

摘要： A diagnosis apparatus for an evaporation system, and particularly, in an evaporation system having a gauge valve in the evaporation system without being affected by a change in internal pressure of the evaporation system, a residual amount of fuel in a fuel tank and an atmospheric density. The diagnosis apparatus is capable of precisely diagnosing the evaporation system even in the case where dirt or stain or the like adheres to the gauge valve and an air cleaner. A gauge pipe is branched between a fuel tank and a purge valve and opened to an intake pipe or atmosphere, and a gauge valve is arranged in the gauge pipe. A state detector is provided for detecting the state of a gauge system comprising the gauge valve and the gauge pipe, and a correcting feature corrects the results of diagnosis by abnormality determination apparatus on the basis of the results of detection by the state detector.

摘要翻译： 一种用于蒸发系统的诊断装置，特别是在蒸发系统中具有量子阀的蒸发系统中，不受蒸发系统的内部压力变化的影响，燃料箱中的燃料剩余量和大气密度 。 即使在污垢或污渍等附着在量规阀和空气净化器的情况下，诊断装置也能够精确地诊断蒸发系统。 计量管在燃料箱和净化阀之间分支，并向进气管或大气敞开，量规管内设有量规阀。 提供了一种用于检测包括量规阀和量规管的量规系统的状态的状态检测器，并且校正特征根据状态检测器的检测结果来校正异常判定装置的诊断结果。

公开(公告)号：US5964811A

公开(公告)日：1999-10-12

申请号：US877857

申请日：1997-04-18

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 ,  G06G7/76

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.

公开(公告)号：US5765540A

公开(公告)日：1998-06-16

申请号：US873774

申请日：1997-06-12

申请人： Toshio Ishii ,  Yutaka Takaku ,  Kazuya Kawano

发明人： Toshio Ishii ,  Yutaka Takaku ,  Kazuya Kawano

IPC分类号： G01M15/04 ,  F02B77/08 ,  F02M25/08 ,  F02M37/20 ,  F02M37/04

CPC分类号： F02M37/20

摘要： This invention performs a diagnosis on the evaporative system in a short period of time by pulling down the evaporative system with a negative pressure of the intake manifold of the engine and by checking a change in the internal pressure of the evaporative system being pulled down. To realize this diagnosis, when introducing a negative pressure from the intake manifold, the pulldown rate is changed based on the internal pressure of the evaporative system. Because the pulldown rate is corrected and controlled during the diagnostic process, a preliminary process for the diagnosis can be eliminated, shortening the time required for the diagnosis. Further, this method allows the evaporative system to be diagnosed without being influenced by external factors such as atmospheric pressure, the internal volume of the evaporative system, the amount of evaporative gas generated, or presence or absence of leakage.

摘要翻译： 本发明通过在发动机的进气歧管的负压下拉下蒸发系统并通过检查被抽吸的蒸发系统的内部压力的变化来在短时间内对蒸发系统进行诊断。 为了实现该诊断，当从进气歧管引入负压时，下拉速率基于蒸发系统的内部压力而改变。 由于在诊断过程中校准和控制下拉率，因此可以消除诊断的初步过程，缩短诊断所需的时间。 此外，该方法允许蒸发系统被诊断而不受诸如大气压，蒸发系统的内部体积，产生的蒸发气体量或存在或不存在泄漏的外部因素的影响。

公开(公告)号：US5740676A

公开(公告)日：1998-04-21

申请号：US603345

申请日：1996-02-20

申请人： Rogelio B. Agustin ,  Akihito Numata ,  Eisaku Fukuchi ,  Yutaka Takaku ,  Toshio Ishii

发明人： Rogelio B. Agustin ,  Akihito Numata ,  Eisaku Fukuchi ,  Yutaka Takaku ,  Toshio Ishii

IPC分类号： F02B77/08 ,  F01N3/20 ,  F01N3/24 ,  F01N11/00 ,  F01N13/02 ,  F02D41/14 ,  F02D45/00 ,  F01N3/28

CPC分类号： F01N3/2053 ,  F01N11/007 ,  F01N13/009 ,  F01N2550/02 ,  Y02T10/47

摘要： A diagnostic apparatus for exhaust gas clarification apparatus for internal combustion engine is disclosed. The diagnostic apparatus can diagnoses the individual catalyst independently by means that an air/fuel ratio sensor is mounted before and after the individual catalyst, and that the individual catalyst is diagnosed by estimating the correlation of the output signals from the air/fuel ratio sensors mounted before and after the individual catalyst, and furthermore, that the individual diangosis operation is performed at distinctive operation regions adequate for their corresponding diagnostic mode.

摘要翻译： 公开了一种内燃机废气净化装置的诊断装置。 诊断装置可以通过在单个催化剂之前和之后安装空气/燃料比传感器来独立地诊断各个催化剂，并且通过估计安装的空气/燃料比传感器的输出信号的相关性来诊断各个催化剂 在个别催化剂之前和之后，此外，单独的个体呼吸系统操作在适合其相应诊断模式的特定操作区域进行。

公开(公告)号：US5400592A

公开(公告)日：1995-03-28

申请号：US194590

申请日：1994-02-10

申请人： Takashi Mukaihira ,  Toshio Ishii ,  Yutaka Takaku ,  Akihito Numata

发明人： Takashi Mukaihira ,  Toshio Ishii ,  Yutaka Takaku ,  Akihito Numata

IPC分类号： F02D45/00 ,  F01N3/20 ,  F01N11/00 ,  F02D41/12 ,  F02D41/14

CPC分类号： F01N11/007 ,  F01N2550/02 ,  F01N2900/0422 ,  Y02T10/47

摘要： A catalytic diagnostic apparatus for determining whether a catalyst of an internal combustion engine has deteriorated as disclosed. Air-fuel ratio sensors are placed at the upstream and downstream sides of the catalytic converter, and the output signal from the upstream air-fuel sensor is used to control the air-fuel mixture provided to the engine via the fuel injectors, in a conventional closed loop operation. Diagnosis of the condition of the catalytic converter is performed only when selected engine operating parameters fall within a predetermined diagnostic range. When the engine is operated in the diagnostic range, the condition of the catalytic converter is analyzed by calculating a deterioration index based on a comparison of the variation of the output signals from the upstream and downstream air-fuel ratio sensors. In a preferred embodiment, a look-up table is provided to correct the deterioration index, based on the intake air flow rate to the engine, and on the cyclic frequency of the variation of the downstream air-fuel ratio sensor.

摘要翻译： 一种用于确定内燃机的催化剂是否已经劣化的催化诊断装置。 空燃比传感器被放置在催化转化器的上游侧和下游侧，并且来自上游空气 - 燃料传感器的输出信号用于通过燃料喷射器控制提供给发动机的空气 - 燃料混合物， 闭环操作。 催化转化器的状态的诊断仅在选定的发动机运转参数落在规定的诊断范围内的情况下进行。 当发动机在诊断范围内操作时，通过基于上游和下游空燃比传感器的输出信号的变化的比较来计算劣化指数来分析催化转化器的状态。 在优选实施例中，提供了一个查找表，用于根据对发动机的进气流量和下游空燃比传感器变化的循环频率来校正劣化指数。

公开(公告)号：US06430495B2

公开(公告)日：2002-08-06

申请号：US09902606

申请日：2001-07-12

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.

摘要翻译： 用于发动机的诊断系统诊断在直接喷射发动机中发生的故障，其中将燃料喷射到燃烧室或稀燃燃烧发动机中。 本发明提供了一种能够诊断进气通风增压部件和燃料供给部件中的故障的发动机的诊断系统，并且在不受不同发动机之间的差异的影响的情况下指定故障部件，部件之间的质量差异与老化 。 发动机的诊断系统包括：根据发动机的运行状态选择第一空气 - 燃料混合物控制部件或第二空气燃料混合物控制部件的选择部件; 用于检测发动机的燃烧状态的燃烧条件检测部件; 以及判定部件，其根据由所述选择部件选择了所述第一空气燃料混合控制部件的状态，基于由所述燃烧条件检测部件检测出的第一燃烧条件来决定故障，以及由所述燃烧检测出的第二燃烧状态 状态检测部件，其中所述第二空气 - 燃料混合物控制部件被所述选择部件选择。