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公开(公告)号：US5473888A
公开(公告)日：1995-12-12
申请号：US261282
申请日：1994-06-15
申请人： Hisayo Douta , Masumi Kinugawa , Atsushi Suzuki
发明人： Hisayo Douta , Masumi Kinugawa , Atsushi Suzuki
CPC分类号： F02D41/1486 , F02D41/1477 , F02D41/2445 , F02D41/2454 , F02D41/2474
摘要： An air-fuel ratio control system for an internal combustion engine utilizes a pre-stored standard relation between an air-fuel ratio sensor signal and a standard air-fuel ratio indicative value for deriving the standard air-fuel ratio indicative value based on the sensor signal. The system further utilizes a pre-stored modified relationship between the standard air-fuel ratio indicative value and a for-control air-fuel ratio indicative value for deriving a for-control air-fuel ratio indicative value based on the derived standard air-fuel ratio indicative value. In the modified relationship, the for-control air-fuel ratio indicative value varies with respect to a corresponding variation of the standard air-fuel ratio indicative value within a given range across the standard air-fuel ratio indicative value representing a stoichiometric air-fuel ratio.
摘要翻译： 用于内燃机的空燃比控制系统利用空燃比传感器信号和标准空燃比指示值之间的预先存储的标准关系，以基于传感器得出标准空燃比指示值 信号。 该系统进一步利用标准空燃比指示值和用于控制空燃比指示值之间的预先存储的改进关系，用于基于导出的标准空气燃料导出控制空燃比指示值 比率指标值。 在修改关系中，控制空燃比指示值相对于表示理论空燃比的标准空燃比指示值的给定范围内的标准空燃比指示值的相应变化而变化 比。
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公开(公告)号：US5343701A
公开(公告)日：1994-09-06
申请号：US949689
申请日：1992-09-23
申请人： Hisayo Douta , Masumi Kinugawa , Atsushi Suzuki
发明人： Hisayo Douta , Masumi Kinugawa , Atsushi Suzuki
CPC分类号： F02D41/1486 , F02D41/1477 , F02D41/2445 , F02D41/2454 , F02D41/2474
摘要： An air-fuel ratio control system for an internal combustion engine utilizes a pre-stored standard relation between an air-fuel ratio sensor signal and a standard air-fuel ratio indicative value for deriving the standard air-fuel ratio indicative value based on the sensor signal. The system further utilizes a pre-stored modified relationship between the standard air-fuel ratio indicative value and a for-control air-fuel ratio indicative value for deriving a for-control air-fuel ratio indicative value based on the derived standard air-fuel ratio indicative value. In the modified relationship, the for-control air-fuel ratio indicative value varies with respect to a corresponding variation of the standard air-fuel ratio indicative value within a given range across the standard air-fuel ratio indicative value representing a stoichiometric air-fuel ratio.
摘要翻译： 用于内燃机的空燃比控制系统利用空燃比传感器信号和标准空燃比指示值之间的预先存储的标准关系，以基于传感器得出标准空燃比指示值 信号。 该系统进一步利用标准空燃比指示值和用于控制空燃比指示值之间的预先存储的改进关系，用于基于导出的标准空气燃料导出控制空燃比指示值 比率指标值。 在修改关系中，控制空燃比指示值相对于表示理论空燃比的标准空燃比指示值的给定范围内的标准空燃比指示值的相应变化而变化 比。
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3.发明授权
公开(公告)号：US5216610A
公开(公告)日：1993-06-01
申请号：US639084
申请日：1991-01-09
申请人： Hisayo Douta , Shinichi Iwamoto
发明人： Hisayo Douta , Shinichi Iwamoto
CPC分类号： F02D31/005
摘要： An engine speed control apparatus having an auxiliary air amount controller is disclosed. The apparatus has an actuator which is attached to an engine intake manifold so as to bypass a throttle valve and controls a flow rate of an auxiliary air and a control unit for driving the actuator. The control unit detects whether an engine is in an idling state or not on the basis of a combination of an engine rotational speed and other information. When the idling state is detected, a target value of an intake pressure on the downstream side of the throttle valve is set in accordance with the engine speed at that time. The control unit drives and controls the actuator so that the actual intake pressure coincides with the target value. Thus, when the operating mode of the engine is shifted from the non-idling state to the idling state, an air amount which is required by the engine can be accurately supplied and the engine speed can be rapidly converged to the target value.
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4.发明授权公开(公告)号：US06295807B1
公开(公告)日：2001-10-02
申请号：US09564534
申请日：2000-05-04
申请人： Hisayo Douta , Masaaki Nakayama , Yasuo Mukai
发明人： Hisayo Douta , Masaaki Nakayama , Yasuo Mukai
IPC分类号： F01N300
CPC分类号： F01N11/007 , F01N2550/02 , F01N2900/0422 , Y02T10/47
摘要： In a system for detecting deterioration of an exhaust catalyst, when a catalyst temperature exceeds 150° C., the changing widths of the output voltage of an oxygen sensor downstream of the catalyst are integrated for a predetermined sampling period to determine data &Sgr;V reflecting the amount of purified gas component, and the deviation of the air/fuel ratio detected by an air/fuel ratio sensor upstream of the catalyst, and a target A/F and an exhaust gas flow rate or an intake flow rate are multiplied so that data &Sgr;A/F&Circlesolid;Q of the fluctuation of the gas component flowing into the catalyst are determined by integrating the multiplied values. At the instant when the catalyst temperature reaches 550° C., the data &Sgr;V, as integrated till then, are compared with a deterioration determining value, as set according to the data &Sgr;A/F&Circlesolid;Q, to determine whether the catalyst is deteriorated.
摘要翻译： 在用于检测排气催化剂的劣化的系统中，当催化剂温度超过150℃时，将催化剂下游的氧传感器的输出电压的变化宽度整合为预定的采样周期，以确定反映量 的净化气体成分，并且由催化剂上游的空气/燃料比传感器检测到的空气/燃料比的偏差和目标A / F和排气流量或进气流量相乘，使得数据SIGMAA / F＆Circlef;流入催化剂的气体成分的波动的Q通过对相乘值进行积分来确定。 在催化剂温度达到550℃的时刻，将与之结合的数据SIGMAV与根据数据SIGMAA / F＆Circlef; Q设定的劣化判定值进行比较，以确定催化剂是否劣化。
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5.发明授权
公开(公告)号：US06073440A
公开(公告)日：2000-06-13
申请号：US828181
申请日：1997-03-18
申请人： Hisayo Douta , Masaaki Nakayama , Yasuo Mukai
发明人： Hisayo Douta , Masaaki Nakayama , Yasuo Mukai
CPC分类号： F01N11/007 , F01N2550/02 , F01N2900/0422 , Y02T10/47
摘要： In a system for detecting deterioration of an exhaust catalyst, when a catalyst temperature exceeds 150.degree. C., the changing widths of the output voltage of an oxygen sensor downstream of the catalyst are integrated for a predetermined sampling period to determine data .SIGMA.V reflecting the amount of purified gas component, and the deviation of the air/fuel ratio detected by an air/fuel ratio sensor upstream of the catalyst, and a target A/F and an exhaust gas flow rate or an intake flow rate are multiplied so that data .SIGMA.A/F .cndot.Q of the fluctuation of the gas component flowing into the catalyst are determined by integrating the multiplied values. At the instant when the catalyst temperature reaches 550.degree. C., the data .SIGMA.V, as integrated till then, are compared with a deterioration determining value, as set according to the data .SIGMA.A/F.cndot.Q, to determine whether the catalyst is deteriorated.
摘要翻译： 在用于检测排气催化剂的劣化的系统中，当催化剂温度超过150℃时，催化剂下游的氧传感器的输出电压的变化宽度被集成预定的采样周期，以确定反映 净化气体成分的量，以及由催化剂上游的空气/燃料比传感器检测到的空气/燃料比的偏差，目标A / F和废气流量或进气流量相乘，使得数据 通过积分相乘值来确定流入催化剂的气体成分的波动的SIGMA A / F .Q。 在催化剂温度达到550℃的时刻，将与之结合的数据SIGMA V与根据数据SIGMA A / F.Q设定的劣化判定值进行比较，以确定催化剂是否劣化。
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公开(公告)号：US5479897A
公开(公告)日：1996-01-02
申请号：US293243
申请日：1994-08-19
申请人： Katsuhiko Kawai , Hisayo Douta , Hiroshi Ikeda
发明人： Katsuhiko Kawai , Hisayo Douta , Hiroshi Ikeda
CPC分类号： F02D41/1401 , F02D31/005 , F02B2075/027 , F02D2011/102 , F02D2041/1409 , F02D2041/1415 , F02D2041/1423 , F02D2041/1433
摘要： In order to optimally suppress effects of error exerted upon control results by any modeling error which may arise from load fluctuations or the like of the internal combustion engine approximated as a dynamic model under an advanced control theory, present and past values of an operating quantity and control quantity which correspond respectively to a control input and control output of an internal combustion engine are utilized as state variable quantities representing the internal state of the dynamic model of an internal combustion engine. Furthermore, the target value and difference are accumulated for the foregoing control quantity. Modeling of the internal combustion engine is performed in realtime, and optimal feedback gain is calculated periodically or under certain specified conditions for a regulator constructed on the basis of these model constants calculated in realtime. The operating quantity for the internal combustion engine is determined on the basis of this calculated optimal feedback gain, the foregoing state variable quantities, and the foregoing accumulated difference value.
摘要翻译： 为了最佳地抑制由先进控制理论近似为动态模型的内燃机的负载波动等可能引起的任何建模误差对控制结果产生的误差的影响，工作量的现值和过去值以及 将分别对应于内燃机的控制输入和控制输出的控制量用作表示内燃机的动态模型的内部状态的状态变量。 此外，对于上述控制量，累积目标值和差。 内燃机的建模是实时执行的，并且对于根据实时计算的这些模型常数构建的调节器，在周期性或某些特定条件下计算最佳反馈增益。 基于该计算的最佳反馈增益，前述状态可变量和上述累积差值来确定内燃机的运行量。
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公开(公告)号：US5390489A
公开(公告)日：1995-02-21
申请号：US134814
申请日：1993-10-12
申请人： Katsuhiko Kawai , Hisayo Douta
发明人： Katsuhiko Kawai , Hisayo Douta
CPC分类号： F02D41/1441 , F02D41/1401 , F02D41/1481 , F02D2041/1409 , F02D2041/1415 , F02D2041/1418 , F02D2041/1431 , F02D2041/1433
摘要： An air-fuel ratio control system for an internal combustion engine uses a dynamic model which is set as an approximation to a controlled object. The controlled object covers an operation sequence from a fuel injection valve to an air-fuel ratio sensor which is provided downstream of a catalytic converter for detecting an actual air-fuel ratio based on the exhaust gas downstream of the catalytic converter. The system derives a fuel injection amount to be fed to the engine by performing a state-feedback control in such a manner as to control the actual air-fuel ratio to a target air-fuel ratio. The system performs the state-feedback control using, as state variables, current and past input and output data relative to the dynamic model. Accordingly, the actual air-fuel ratio monitored on the downstream-side of the catalytic converter is controlled to the target air-fuel ratio without delay by directly deriving the fuel injection amount using the state-feedback control.
摘要翻译： 用于内燃机的空燃比控制系统使用被设置为对受控对象的近似的动态模型。 受控对象覆盖从燃料喷射阀到空燃比传感器的操作顺序，其设置在催化转化器的下游，用于基于催化转化器下游的排气来检测实际空燃比。 该系统通过以将实际空燃比控制为目标空燃比的方式进行状态反馈控制，得到供给到发动机的燃料喷射量。 系统执行状态反馈控制，使用作为状态变量的当前和过去的输入和输出数据相对于动态模型。 因此，通过使用状态反馈控制直接导出燃料喷射量，将催化转化器的下游侧监视的实际空燃比无延迟地控制在目标空燃比。
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