公开(公告)号：US06698186B2

公开(公告)日：2004-03-02

申请号：US10168685

申请日：2002-10-28

申请人： Masaki Ueno ,  Shusuke Akazaki ,  Yoshihisa Iwaki ,  Hiroshi Kitagawa

发明人： Masaki Ueno ,  Shusuke Akazaki ,  Yoshihisa Iwaki ,  Hiroshi Kitagawa

IPC分类号： F01N300

CPC分类号： F02D41/1441 ,  F01N11/007 ,  F01N2550/02 ,  F02D41/0235 ,  F02D41/1401 ,  F02D41/1402 ,  F02D41/1403 ,  F02D41/1456 ,  F02D2041/1409 ,  F02D2041/1415 ,  F02D2041/1416 ,  F02D2041/1418 ,  F02D2041/142 ,  F02D2041/1431 ,  F02D2041/1432 ,  F02D2041/1433 ,  Y02T10/47

摘要： A target air-fuel ratio KCMD for an exhaust gas upstream of a catalytic converter is sequentially determined to converge the output VO2/OUT of an O2 sensor downstream of the catalytic converter to a target value VO2/TARGET, and the amount of fuel supplied to an internal combustion engine is controlled to converge the output KACT of an air-fuel ratio sensor to the target air-fuel ratio KCMD. While the amount of fuel supplied to the internal combustion engine is being thus controlled, the value of a deterioration linear function &sgr; whose variable components are represented by time-series data of the output VO2/OUT of the O2 sensor is determined. A central value of the square &sgr;2 of the value of the deterioration linear function &sgr; is determined as a deterioration evaluating parameter. A deteriorated state of the catalytic converter is evaluated on the basis of the value of the deterioration evaluating parameter.

摘要翻译： 依次确定催化转化器上游排气的目标空燃比KCMD，将催化转化器下游的O2传感器的输出VO2 / OUT收敛到目标值VO2 / TARGET，并将供给的燃料量 控制内燃机将空燃比传感器的输出KACT收敛到目标空燃比KCMD。 在这样控制供给到内燃机的燃料量的同时，确定由O2传感器的输出VO2 / OUT的时间序列数据表示可变成分的退化线性函数sigma的值。 退化线性函数sigma的值的平方西格玛2的中心值被确定为劣化评估参数。 基于劣化评价参数的值来评价催化转化器的劣化状态。

公开(公告)号：US06640540B2

公开(公告)日：2003-11-04

申请号：US09978020

申请日：2001-10-17

申请人： Masahiro Sato ,  Yoshihisa Iwaki ,  Masaki Ueno ,  Shusuke Akazaki ,  Yuji Yasui

发明人： Masahiro Sato ,  Yoshihisa Iwaki ,  Masaki Ueno ,  Shusuke Akazaki ,  Yuji Yasui

IPC分类号： F01N300

CPC分类号： F01N3/0835 ,  F01N3/0814 ,  F01N3/0871 ,  F01N3/0878 ,  F01N3/30 ,  F01N11/00 ,  F01N11/002 ,  F01N13/009 ,  F01N13/0097 ,  F01N2430/06 ,  F01N2550/03 ,  F01N2570/12 ,  Y02T10/47

摘要： An adsorbent state determining apparatus is provided for accurately determining the state of an adsorbent including a deterioration as well as for allowing for recovery of the adsorbent if its adsorbent performance can be restored. The adsorbent state determining apparatus determines the state of an adsorbent for adsorbing hydrocarbons contained in exhaust gases. An upstream and a downstream temperature sensor are provided at upstream and downstream locations of the adsorbent in an exhaust system for detecting temperatures of exhaust gases upstream and downstream of the adsorbent. An engine water temperature sensor detects an operating state of the engine. An ECU estimates the temperature of the exhaust gas which should be detected downstream of the adsorbent during adsorption of the adsorbent based on the upstream temperature detected by the upstream temperature sensor and an engine water temperature of the engine detected by the engine water temperature sensor. The ECU then compares the estimated downstream temperature with the detected downstream temperature detected by the downstream temperature sensor during adsorption of the adsorbent to determine the adsorption state of the adsorbent.

公开(公告)号：US06550449B2

公开(公告)日：2003-04-22

申请号：US09741837

申请日：2000-12-22

申请人： Shusuke Akazaki ,  Yoshihisa Iwaki ,  Masaki Ueno

发明人： Shusuke Akazaki ,  Yoshihisa Iwaki ,  Masaki Ueno

IPC分类号： F02D4116

CPC分类号： F02D41/0245 ,  F02D37/02 ,  F02P5/1506 ,  Y02T10/26 ,  Y02T10/46

摘要： A control system for an internal combustion engine having a catalyst arranged in the exhaust system is disclosed. In the control system, catalyst temperature rise accelerating control is executed by increasing the intake air amount immediately after starting of the engine and retarding the ignition timing to make the rotational speed of the engine coincide with a target rotational speed. The air-fuel ratio of an air-fuel mixture supplied to the engine is controlled to a lean region with respect to the stoichiometric ratio immediately after starting of the engine. The degree of making the air-fuel ratio leaner is suppressed when the retard amount of the ignition timing during the execution of the catalyst temperature rise accelerating control is less than a predetermined retard amount.

摘要翻译： 公开了一种具有布置在排气系统中的催化剂的内燃机的控制系统。 在控制系统中，催化剂升温加速控制是通过增加发动机起动后立即进气量而延迟点火正时，使发动机的转速与目标转速一致。 提供给发动机的空气燃料混合物的空燃比被控制为相对于发动机起动之后的化学计量比的稀薄区域。 当执行催化剂温度升高加速控制期间的点火正时的延迟量小于预定的延迟量时，抑制使空燃比更稀的程度。

公开(公告)号：US06449944B1

公开(公告)日：2002-09-17

申请号：US09743906

申请日：2001-01-17

申请人： Yuji Yasui ,  Shusuke Akazaki ,  Yoshihisa Iwaki ,  Tadashi Satoh ,  Masaki Ueno

发明人： Yuji Yasui ,  Shusuke Akazaki ,  Yoshihisa Iwaki ,  Tadashi Satoh ,  Masaki Ueno

IPC分类号： F01N300

CPC分类号： F02D41/1403 ,  F01N11/007 ,  F01N2550/02 ,  F01N2900/0422 ,  F02D41/0235 ,  F02D41/1402 ,  F02D41/1441 ,  F02D41/1456 ,  F02D41/22 ,  F02D2041/1416 ,  F02D2041/1418 ,  F02D2041/142 ,  F02D2041/1423 ,  F02D2041/1431 ,  F02D2041/1432 ,  F02D2041/1433 ,  Y02T10/47

摘要： A first exhaust gas sensor 5 (air-fuel ratio sensor) and a second exhaust gas sensor 6 (O2 sensor) are disposed respectively upstream and downstream of a catalytic converter. An exhaust system E which ranges from the exhaust gas sensor 5 to the exhaust gas sensor 6 and includes the catalytic converter 3 is regarded as an object exhaust system E, and a behavior of the object exhaust system E is modeled. When an internal combustion engine 1 is in operation, parameters to be set of the model of the object exhaust system E are sequentially identified based on the data of outputs of the exhaust gas sensors 5, 6. A deteriorated state of the catalytic converter 3 is determined based on the data of the identified values. Concurrent with the determination of the deteriorated state, a target air-fuel ratio for the internal combustion engine 1 is sequentially determined in order to converge the output of the exhaust gas sensor 5 to a given target value, and the air-fuel ratio of the internal combustion engine 1 is controlled to converge the output (the detected value of the air-fuel ratio) of the first exhaust gas sensor 5 to the target air-fuel ratio, for thereby allowing the catalytic converter 3 to achieve an optimum purifying capability. In this manner, the deteriorated state of the catalytic converter 3 can be determined in various operation states of the internal combustion engine 1 while keeping the purifying capability of the catalytic converter 3.

摘要翻译： 第一排气传感器5（空燃比传感器）和第二排气传感器6（O2传感器）分别设置在催化转化器的上游和下游。 从排气传感器5到排气传感器6并且包括催化转化器3的排气系统E被认为是对象排气系统E，并且对对象排气系统E的行为进行建模。 当内燃机1运转时，根据排气传感器5,6的输出数据，依次识别对象排气系统E的模型的参数，催化转化器3的劣化状态为 基于所识别的值的数据确定。 与劣化状态的判定同时，为了将排气传感器5的输出收敛到给定的目标值，依次确定内燃机1的目标空燃比，空燃比 控制内燃机1使第一废气传感器5的输出（空燃比的检测值）与目标空燃比收敛，从而使催化转化器3达到最佳的净化能力。 以这种方式，可以在保持催化转化器3的净化能力的同时，在内燃机1的各种运行状态下确定催化转化器3的劣化状态。

公开(公告)号：US06449943B1

公开(公告)日：2002-09-17

申请号：US09748189

申请日：2000-12-27

申请人： Masaki Ueno ,  Yoshihisa Iwaki ,  Shusuke Akazaki

发明人： Masaki Ueno ,  Yoshihisa Iwaki ,  Shusuke Akazaki

IPC分类号： F01N300

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

摘要： The values of parameters of a model of an object exhaust system including a catalytic converter are identified from the data of outputs from an air-fuel ratio sensor and an O2 sensor which are disposed respectively upstream and downstream of the catalytic converter while an internal combustion engine associated with the catalytic converter is in operation. A deterioration evaluating parameter representing the degree of variation of time-series data of the identified parameters is determined from the time-series data of the identified parameters. The deteriorated state of the catalytic converter is evaluated based on the deterioration evaluating parameter.

公开(公告)号：US06292739B1

公开(公告)日：2001-09-18

申请号：US09465765

申请日：1999-12-17

申请人： Yuji Yasui ,  Shusuke Akazaki ,  Tadashi Sato ,  Masaki Ueno ,  Yoshihisa Iwaki ,  Hiroshi Tagami ,  Shuji Nagatani

发明人： Yuji Yasui ,  Shusuke Akazaki ,  Tadashi Sato ,  Masaki Ueno ,  Yoshihisa Iwaki ,  Hiroshi Tagami ,  Shuji Nagatani

IPC分类号： F02D4114

CPC分类号： F02D41/008 ,  F02D41/1402 ,  F02D41/1403 ,  F02D41/1456 ,  F02D41/1487 ,  F02D2041/1409 ,  F02D2041/1415 ,  F02D2041/1416 ,  F02D2041/1418 ,  F02D2041/142 ,  F02D2041/1423 ,  F02D2041/1426 ,  F02D2041/1431 ,  F02D2041/1433

摘要： An allowable range (adaptive allowable range) for limiting a manipulated variable generated in order to converge the difference between an output from an O2 sensor disposed downstream of a catalytic converter and a target value thereof to “0” is sequentially updated depending on how the manipulated variable deviates from the allowable range.

摘要翻译： 为了将设置在催化转化器的下游的O2传感器的输出与目标值的输出之间的差积分为“0”，限制所产生的操作变量的允许范围（自适应容许范围）根据被操纵的 变量偏离容许范围。

公开(公告)号：US06230486B1

公开(公告)日：2001-05-15

申请号：US09465395

申请日：1999-12-17

申请人： Yuji Yasui ,  Shusuke Akazaki ,  Tadashi Sato ,  Masaki Ueno ,  Yoshihisa Iwaki

发明人： Yuji Yasui ,  Shusuke Akazaki ,  Tadashi Sato ,  Masaki Ueno ,  Yoshihisa Iwaki

IPC分类号： F01N300

CPC分类号： F02D41/1441 ,  F02D41/1402 ,  F02D41/1403 ,  F02D41/1456 ,  G05B13/0255

摘要： A plant control system has a reference value setting unit for variably setting a reference value for an air-fuel ratio to be given to an exhaust system including a catalytic converter, depending on a component based on an adaptive control law of a manipulated variable of the air-fuel ratio generated by a controller according to an adaptive sliding mode control process in order to converge an output of an O2 sensor disposed downstream of the catalytic converter to a target value. The manipulated variable generated by the controller represents the difference between the air-fuel ratio and the reference value, required to converge the output of the O2 sensor to the target value.

摘要翻译： 工厂控制系统具有参考值设定单元，用于根据构成要素的操作变量的自适应控制定律，根据构成要素，对包含催化转换器的排气系统进行空燃比的基准值的可变设定 由控制器根据自适应滑动模式控制过程产生的空燃比，以将设置在催化转化器下游的O2传感器的输出收敛到目标值。 由控制器产生的操纵变量表示将O2传感器的输出收敛到目标值所需的空燃比和参考值之间的差。

公开(公告)号：US06647972B2

公开(公告)日：2003-11-18

申请号：US09975002

申请日：2001-10-12

申请人： Masahiro Sato ,  Yoshihisa Iwaki ,  Masaki Ueno ,  Shusuke Akazaki ,  Yasuyuki Miyahara

发明人： Masahiro Sato ,  Yoshihisa Iwaki ,  Masaki Ueno ,  Shusuke Akazaki ,  Yasuyuki Miyahara

IPC分类号： F02M2507

CPC分类号： F02M26/46 ,  F01N2560/028 ,  F02D41/0065 ,  F02D41/222 ,  F02M26/15 ,  F02M26/49

摘要： A state determining apparatus for an exhaust gas recirculation system is provided for appropriately determining the state of an exhaust gas recirculation system including an EGR passage. An exhaust gas recirculation system is arranged in an exhaust system of an internal combustion engine including an EGR passage for recirculating a portion of exhaust gases to an intake system in accordance with an operating state of the internal combustion engine. The state determining apparatus comprises a humidity sensor arranged in the EGR passage for detecting a humidity within the EGR passage, and an ECU for determining the state of the exhaust gas recirculation system based on a result detected by the humidity sensor.

公开(公告)号：US06581370B2

公开(公告)日：2003-06-24

申请号：US09985764

申请日：2001-11-06

申请人： Masahiro Sato ,  Yoshihisa Iwaki ,  Masaki Ueno ,  Shusuke Akazaki ,  Takashi Haga ,  Tadashi Sato ,  Yasuyuki Miyahara

发明人： Masahiro Sato ,  Yoshihisa Iwaki ,  Masaki Ueno ,  Shusuke Akazaki ,  Takashi Haga ,  Tadashi Sato ,  Yasuyuki Miyahara

IPC分类号： F01N300

CPC分类号： F01N3/0835 ,  F01N3/0878 ,  F01N11/00 ,  F01N2550/06 ,  F01N2560/028 ,  F02D41/1439 ,  F02D41/1441 ,  F02D41/222 ,  F02D2200/0418 ,  G01N33/007 ,  Y02T10/20 ,  Y02T10/40 ,  Y02T10/47

摘要： A failure determination device that detects the humidity of exhaust gases from an internal combustion engine and a control system for an exhaust passage changeover valve, which can switch the changeover valve with appropriate timing, thereby enabling sufficient purification of exhaust gases. An operating condition of the engine is detected. Based on the detected operating condition of the engine, it is determined whether the engine is in an operating condition in which failure determination of the humidity sensor can be executed. It is determined whether the humidity sensor has failed, based on a result of detection by the humidity sensor, when it has been judged that the failure determination of the humidity sensor can be executed.

摘要翻译： 一种故障判定装置，其检测来自内燃机的废气的湿度和排气通道切换阀的控制系统，其能够以适当的时刻切换切换阀，从而能够充分净化废气。 检测发动机的运行状态。 基于检测到的发动机的运转状况，判定发动机是否处于能够执行湿度传感器的故障判定的运转状态。 当判断出可以执行湿度传感器的故障判定时，基于湿度传感器的检测结果来确定湿度传感器是否发生故障。

公开(公告)号：US06195988B1

公开(公告)日：2001-03-06

申请号：US09499975

申请日：2000-02-08

申请人： Yuji Yasui ,  Shusuke Akazaki ,  Tadashi Sato ,  Masaki Ueno ,  Yoshihisa Iwaki

发明人： Yuji Yasui ,  Shusuke Akazaki ,  Tadashi Sato ,  Masaki Ueno ,  Yoshihisa Iwaki

IPC分类号： F01N300

CPC分类号： F02D41/1458 ,  F02D41/1402 ,  F02D41/1403 ,  F02D41/1406 ,  F02D41/1477 ,  F02D41/1481 ,  F02D2041/1422 ,  F02D2041/1423 ,  F02D2041/1431

摘要： An object system for generating an output signal of an O2 sensor from a target air-fuel ratio is expressed as a model including a response delay element and a dead time element. Data of identified values of parameters of the model are sequentially generated by an identifier. Data of an estimated value of the output signal of the O2 sensor after a dead time of the object system is sequentially generated by an estimator. The target air-fuel ratio is generated according to an adaptive sliding mode control process performed by a sliding mode controller using the data of the identified and estimated values. The air-fuel ratio of an internal combustion engine is manipulated on the basis of the target air-fuel ratio according to a feed-forward control process.

摘要翻译： 用于从目标空燃比产生O2传感器的输出信号的目标系统被表示为包括响应延迟元件和死区时间元件的模型。 通过标识符顺序地生成模型的参数的标识值的数据。 由对象系统的死区时间之后的O2传感器的输出信号的估计值的数据由估计器依次产生。 目标空燃比根据滑动模式控制器使用所识别的和估计值的数据执行的自适应滑动模式控制处理来生成。 根据前馈控制处理，基于目标空燃比来操作内燃机的空燃比。