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公开(公告)号：US6125831A
公开(公告)日：2000-10-03
申请号：US136924
申请日：1998-08-21
CPC分类号： F02D41/2461 , F02D41/1402 , F02D41/1456 , G05B13/042 , F02D2041/1415 , F02D2041/1418 , F02D2041/143 , F02D2041/1433
摘要： A control system for a plant includes a sensor for detecting an output from the plant, an adaptive controller for controlling a manipulated variable applied to control of the plant in such a manner that an output from the sensor becomes equal to a desired value, and an adaptive parameter-adjusting device for adjusting adaptive parameters used by the adaptive controller. The adaptive parameter-adjusting device has an identification error-calculating device for calculating an identification error of the adaptive parameters and generating an identification error signal indicative of the calculated identification error, and an adjusting device for adjusting the adaptive parameters based on the calculated identification error. The adaptive parameter-adjusting device includes a non-linear filter for generating an output of 0 or approximately 0 in response to the identification error signal when the identification error is within a predetermined range. The adjusting device adjusts the adaptive parameters by using the output from the non-linear filter.
摘要翻译： 一种用于设备的控制系统包括用于检测来自所述设备的输出的传感器，用于控制施加到所述设备的控制的操作变量的自适应控制器，使得所述传感器的输出变得等于期望值，以及 自适应参数调整装置，用于调整自适应控制器使用的自适应参数。 自适应参数调整装置具有识别误差计算装置，用于计算自适应参数的识别误差并产生表示计算出的识别误差的识别误差信号;以及调整装置，用于基于所计算的识别误差来调整自适应参数 。 自适应参数调整装置包括非线性滤波器，用于当识别误差在预定范围内时响应于识别误差信号产生0或大约0的输出。 调节装置通过使用非线性滤波器的输出来调整自适应参数。
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2.发明授权
公开(公告)号：US6021767A
公开(公告)日：2000-02-08
申请号：US143535
申请日：1998-08-28
CPC分类号： G05B13/042 , F02D41/1402 , F02D41/2454 , F02D41/2477 , F02D2041/1415 , F02D2041/1418 , F02D2041/143 , F02D2041/1433 , F02D2250/12 , F02D41/1456 , F02D41/2483
摘要： An air-fuel ratio control system for a multi-cylinder engine is provided. An air-fuel ratio sensor is arranged in an exhaust system of the engine for detecting an air-fuel ratio of a mixture supplied to the engine and for generating an output indicative of the air-fuel ratio of the mixture. An adaptive controller determines an amount of fuel to be supplied to the engine with a first predetermined repetition period in a manner such that the output from the air-fuel ratio sensor becomes equal to a desired value. An adaptive parameter-adjusting mechanism adjusts adaptive parameters used by the adaptive controller. In the adaptive parameter-adjusting mechanism, the adaptive parameters are calculated with a second predetermined repetition period longer than the first predetermined repetition period, and output data indicative of results of the calculation is generated. Further, the output data indicative of results of the calculation is smoothed and output data indicative of the smoothed data is generated with a repetition period at least equal to the first predetermined repetition period. The adaptive controller uses the smoothed data as values of the adaptive parameters.
摘要翻译： 提供了一种用于多缸发动机的空燃比控制系统。 在发动机的排气系统中布置有空燃比传感器，用于检测供应到发动机的混合物的空燃比并产生表示混合物的空燃比的输出。 自适应控制器以使得来自空燃比传感器的输出变得等于期望值的方式，以第一预定重复周期来确定要提供给发动机的燃料量。 自适应参数调整机制调整自适应控制器使用的自适应参数。 在自适应参数调整机构中，以比第一预定重复周期长的第二预定重复周期来计算自适应参数，并且生成表示计算结果的输出数据。 此外，表示计算结果的输出数据被平滑，并且以至少等于第一预定重复周期的重复周期生成指示平滑数据的输出数据。 自适应控制器使用平滑数据作为自适应参数的值。
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公开(公告)号：US6026793A
公开(公告)日：2000-02-22
申请号：US143542
申请日：1998-08-28
CPC分类号： G05B13/042 , F02D41/1402 , F02D41/1456 , F02D41/2454 , F02D41/2477 , F02D2041/1415 , F02D2041/1418 , F02D2041/143 , F02D2041/1433 , F02D41/2483
摘要： A control system for a plant includes a sensor for detecting an output from the plant, an adaptive controller for controlling a manipulated variable applied to control of the plant in a manner such that an output from the sensor becomes equal to a desired value, and an adaptive parameter vector-adjusting mechanism for adjusting an adaptive parameter vector used by the adaptive controller. The adaptive parameter vector-adjusting mechanism is constructed such that an updating component for updating the adaptive parameter vector is added to an initial value of the adaptive parameter vector, and updates the adaptive parameter vector by multiplying at least part of preceding values of the updating component by a predetermined coefficient which is larger than 0 but smaller than 1.
摘要翻译： 一种用于设备的控制系统包括用于检测来自所述设备的输出的传感器，用于以使得所述传感器的输出变为等于所需值的方式控制施加于所述设备的控制的操纵变量的自适应控制器，以及 自适应参数矢量调整机制，用于调整自适应控制器使用的自适应参数矢量。 自适应参数矢量调整机构被构造成使得用于更新自适应参数矢量的更新部件被添加到自适应参数矢量的初始值，并且通过将更新部件的至少一部分先前值相乘来更新自适应参数矢量 通过大于0但小于1的预定系数。
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公开(公告)号：US5983875A
公开(公告)日：1999-11-16
申请号：US139643
申请日：1998-08-25
CPC分类号： G05B13/042 , F02D41/1402 , F02D41/1481 , F02D13/0207 , F02D13/0257 , F02D2041/001 , F02D2041/1415 , F02D2041/1418 , F02D2041/1431 , F02D2200/703 , F02D41/1441 , F02D41/1456
摘要： A control system for a plant includes a sensor for detecting an output from the plant, an adaptive controller for controlling a manipulated variable applied to control of the plant in a manner such that an output from the sensor becomes equal to a desired value, and an adaptive parameter-adjusting device for adjusting adaptive parameters used by the adaptive controller. The adaptive controller is configured in a manner adapted to a predetermined dead time shorter than an actual dead time which the plant and the detection means possess. Sampling timing of an input vector input to the adaptive parameter-adjusting device corresponds to the actual dead time.
摘要翻译： 一种用于设备的控制系统包括用于检测来自所述设备的输出的传感器，用于以使得所述传感器的输出变为等于所需值的方式控制施加于所述设备的控制的操纵变量的自适应控制器，以及 自适应参数调整装置，用于调整自适应控制器所使用的自适应参数。 自适应控制器被配置为适于比植物和检测装置具有的实际死区时间短的预定死区时间。 输入到自适应参数调整装置的输入矢量的采样定时对应于实际死区时间。
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公开(公告)号：US06698186B2
公开(公告)日：2004-03-02
申请号：US10168685
申请日：2002-10-28
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。
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公开(公告)号：US5505174A
公开(公告)日：1996-04-09
申请号：US421181
申请日：1995-04-13
申请人： Isao Komoriya , Yusuke Hasegawa , Hidetaka Maki , Shusuke Akazaki , Hiroshi Kitagawa , Toru Kitamura
发明人： Isao Komoriya , Yusuke Hasegawa , Hidetaka Maki , Shusuke Akazaki , Hiroshi Kitagawa , Toru Kitamura
CPC分类号： F02D41/0072 , F02M26/57 , F02D2041/1431 , Y02T10/47
摘要： A system for estimating an exhaust gas recirculation rate for an internal combustion engine. In the system, the EGR rate when its operation is steady is first determined to a desired value with respect to the engine operating conditions at least including the engine speed and the engine load, then the EGR rate is estimated as;EGR rate=(steady-state EGR rate).times.{(gas flow rate QACT determined by the actual valve lifting amount and the ratio between the upstream pressure and the downstream pressure of valve)/(gas flow rate QCMD determined by a command value and the ratio between the upstream pressure and the downstream pressure of valve)} A delay time until the recycled gas enters the combustion chamber is determined and one from among the EGR rates or a fuel injection correction coefficients calculated therefrom consecutively is selected.
摘要翻译： 一种用于估计内燃机的排气再循环速率的系统。 在该系统中，其运转稳定时的EGR率首先被确定为至少包括发动机转速和发动机负荷的发动机运行条件的期望值，则EGR率被估计为： EGR率=（稳态EGR率）x {（由实际阀提升量确定的气体流量QACT和阀的上游压力与下游压力之间的比率）/（由指令值确定的气体流量QCMD和 阀的上游压力和下游压力之间的比率）}确定直到再循环气体进入燃烧室的延迟时间，并且选择EGR率之中的一个或连续计算的燃料喷射校正系数。
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公开(公告)号：US5701871A
公开(公告)日：1997-12-30
申请号：US575070
申请日：1995-12-19
CPC分类号： F02D41/047
摘要： A fuel supply control system for an internal combustion engine calculates a basic amount of fuel to be supplied to the engine, based on the rotational speed of the engine and load on the engine. An amount of fuel adhering to the inner wall surface of the intake passage of the engine is estimated to calculate an adherent fuel-dependent correction amount. An amount of fuel carried off from the inner wall surface of the intake passage into at least one combustion chamber of the engine is estimated to calculate a carried-off fuel-dependent correction amount. The basic amount of fuel is corrected such that the air-fuel ratio of a mixture supplied to the engine becomes equal to a desired air-fuel ratio determined depending on operating conditions of the engine to obtain a corrected basic fuel amount, and at the same time the corrected basic fuel amount is corrected by the use of the adherent fuel-dependent correction amount and the carried-off fuel-dependent correction amount to calculate an amount of fuel to be supplied to the engine. At least one of the adherent fuel-dependent correction amount and the carried-off fuel-dependent correction amount is corrected according to the desired air-fuel ratio.
摘要翻译： 用于内燃机的燃料供给控制系统基于发动机的转速和发动机的负荷来计算供给发动机的基本燃料量。 估计附着在发动机的进气通路的内壁面上的燃料的量来计算粘附燃料相关的校正量。 从进气通道的内壁表面传送到发动机的至少一个燃烧室中的燃料量被估计为计算取决于燃料的燃料相关校正量。 燃料的基本量被校正为使得提供给发动机的混合物的空燃比变得等于根据发动机的操作条件确定的期望的空燃比以获得校正的基本燃料量，并且在相同的情况下 通过使用粘附燃料依赖性校正量和排除燃料相关校正量来校正校正的基本燃料量，以计算要供给到发动机的燃料量。 根据所需的空燃比校正粘附燃料依赖性校正量和排除燃料依赖校正量中的至少一个。
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8.发明授权
公开(公告)号：US5613481A
公开(公告)日：1997-03-25
申请号：US606077
申请日：1996-02-23
申请人： Hiroshi Kitagawa , Shusuke Akazaki , Hidetaka Maki
发明人： Hiroshi Kitagawa , Shusuke Akazaki , Hidetaka Maki
CPC分类号： F02D41/0032 , F02B2275/18
摘要： A control system for an internal combustion engine includes a canister for adsorbing evaporative fuel generated in the fuel tank, a purging passage extending between the canister and the intake system, for purging evaporative fuel into the intake system, and a purge control valve for controlling a flow rate of evaporative fuel to be supplied to the intake system through the purging passage. Various sensors detect operating conditions of the engine, and an ECU controls the purge control valve according to detected operating conditions. An amount of fuel to be supplied to the engine is feedback-controlled by calculating a feedback control amount, based on an output from an air-fuel ratio sensor arranged in the exhaust system by using a controller of a recurrence formula type, and the amount of fuel to be supplied to the engine is controlled based on the calculated feedback control amount, such that an air-fuel ratio of an air-fuel mixture supplied to the engine is converged to a desired air-fuel ratio. An average value of the feedback control amount is calculated while the purge control valve is open. The purge control valve is controlled based on the calculated average value.
摘要翻译： 一种用于内燃机的控制系统包括用于吸收在燃料箱中产生的蒸发燃料的罐，在罐和进气系统之间延伸的净化通道，用于将蒸发燃料吹扫到进气系统中;以及清洗控制阀，用于控制 通过清洗通道供给到进气系统的蒸发燃料的流量。 各种传感器检测发动机的运行状况，ECU根据检测到的运行条件控制排气控制阀。 通过使用布置在排气系统中的空燃比传感器的输出，通过使用复发公式类型的控制器计算反馈控制量，并且将量供给发动机的燃料量 基于所计算的反馈控制量来控制供给到发动机的燃料，使得供给到发动机的空气燃料混合物的空燃比被收敛到期望的空燃比。 在清洗控制阀打开时计算反馈控制量的平均值。 基于计算的平均值控制清洗控制阀。
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公开(公告)号：US6073073A
公开(公告)日：2000-06-06
申请号：US882029
申请日：1997-06-25
申请人： Toru Kitamura , Hiroshi Kitagawa , Shusuke Akazaki
发明人： Toru Kitamura , Hiroshi Kitagawa , Shusuke Akazaki
CPC分类号： F02D41/1402 , F02D41/2454 , F02D2041/1409 , F02D2041/1415 , F02D2041/1418 , F02D2041/142 , F02D2041/1426 , F02D2041/1433 , F02D41/1456
摘要： A system for controlling an air/fuel ratio of an internal combustion engine, including a feedback control loop having an adaptive controller (STR controller) that receives as inputs a desired value r and a controlled variable y output from the plant (engine) and an adaptation mechanism that estimates adaptive parameters. The STR controller calculates a feedback correction coefficient KSTR, as an output u based upon at least the adaptive parameters, for correcting a basic amount of fuel supply calculated by retrieving mapped data, prepared beforehand, such that the controlled variable y converges to the desired value r. The system is configured such that the controlled variable y is determined based upon the detected air/fuel ratio KACT and a desired air/fuel ratio KCMD so that the desired value r is a predetermined value. More specifically, the controlled variable is determined to be a ratio between the detected air/fuel ratio and the desired air/fuel ratio such that the desired value r is 1.0 or thereabout. With this arrangement, when the desired air/fuel ratio is changed or corrected frequently, the estimation of the adaptive parameters is not affected, thereby improving the stability of air/fuel ratio control.
摘要翻译： 一种用于控制内燃机的空燃比的系统，包括具有自适应控制器（STR控制器）的反馈控制回路，所述自适应控制器（STR控制器）接收从所述设备（发动机）输出的期望值r和控制变量y作为输入， 估计自适应参数的适应机制。 STR控制器基于至少自适应参数计算反馈校正系数KSTR作为输出u，用于校正通过检索预先准备的映射数据计算的燃料供应量的基本量，使得控制变量y收敛到期望值 r。 该系统被构造为使得基于检测到的空气/燃料比KACT和期望的空气/燃料比KCMD来确定受控变量y，使得期望值r是预定值。 更具体地说，控制变量被确定为检测到的空气/燃料比与期望的空气/燃料比之间的比，使得期望值r为1.0或其附近。 通过这种布置，当期望的空燃比频繁地改变或校正时，自适应参数的估计不受影响，从而提高空/燃比控制的稳定性。
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10.发明授权Apparatus for detecting failure of exhaust gas sensor utilizing element temperature 失效利用元件温度检测废气传感器故障的装置公开(公告)号：US06935155B2
公开(公告)日：2005-08-30
申请号：US10437458
申请日：2003-05-14
申请人： Yuji Yasui , Hiroshi Kitagawa
发明人： Yuji Yasui , Hiroshi Kitagawa
IPC分类号： G01N27/409 , F01N3/28 , F02D41/14 , F02D41/22 , F02D45/00 , G01N27/26 , G01N27/00 , F02D41/00
CPC分类号： F02D41/222 , F02D41/1456 , F02D2041/288 , Y02T10/40
摘要： An apparatus for detecting a failure of an exhaust gas sensor disposed in an exhaust manifold is provided. The apparatus comprises a control unit. The control unit compares detection values of the exhaust gas sensor detected under different element temperatures of the exhaust gas sensor. The control unit detects a failure of the exhaust gas sensor based on the comparison result. In one embodiment, the different states include a state in which the element temperature is maintained at higher level and a state in which the element temperature is maintained at lower level. The element temperature can be controlled by a response assignment control scheme. In one embodiment, the detection values are subjected to a filtering process and/or a statistical process using a successive least squares method. The control unit compares the statistically processed detection values to detect a failure of the exhaust gas sensor.
摘要翻译： 提供一种用于检测设置在排气歧管中的废气传感器的故障的装置。 该装置包括控制单元。 控制单元比较在废气传感器的不同元件温度下检测到的废气传感器的检测值。 控制单元根据比较结果来检测排气传感器的故障。 在一个实施例中，不同的状态包括元件温度保持在较高水平的状态和元件温度保持在较低水平的状态。 元件温度可以通过响应分配控制方案来控制。 在一个实施例中，使用连续最小二乘法对检测值进行滤波处理和/或统计处理。 控制单元将统计处理的检测值进行比较以检测废气传感器的故障。
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