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。

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：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。

公开(公告)号：US06324836B1

公开(公告)日：2001-12-04

申请号：US09592852

申请日：2000-06-12

申请人： Shinji Nakagawa ,  Toshio Ishii ,  Yutaka Takaku ,  Minoru Ohsuga ,  Hiroyuki Takamura

发明人： Shinji Nakagawa ,  Toshio Ishii ,  Yutaka Takaku ,  Minoru Ohsuga ,  Hiroyuki Takamura

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。

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

IPC分类号： G01N27/409 ,  F01N3/00 ,  F01N3/20 ,  F01N11/00 ,  G01M15/04 ,  G01N27/26

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。

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。

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。