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公开(公告)号：US5569847A
公开(公告)日：1996-10-29
申请号：US517855
申请日：1995-08-22
CPC分类号： F02D41/1473 , F02D41/1401 , F02D41/1481 , F02D2041/1409 , F02D2041/1415 , F02D2041/1416 , F02D2041/1417 , F02D2041/1431 , F02D2041/1433 , F02D2041/1434 , F02D41/1456
摘要： An air-fuel ratio estimator for estimating air-fuel ratio of an air and fuel mixture supplied to an internal combustion engine from an output of an air-fuel ratio sensor. In the estimator, detection response lag time of said air-fuel ratio sensor is approximated as a first-order lag time system to produce state equation from said first-order lag time system. The state equation is discretized for a period delta T to obtain a discretized state equation. A transfer function is calculated from the discretized state equation and is then an inverse transfer function is calculated from said transfer function. And correction coefficient of said inverse transfer function is determined and multiplying with inverse transfer function to the sensor output estimate an air-fuel ratio of an air and fuel mixture supplied to the engine. The correction coefficient is predetermined with respect to engine speed and is made zero at or below a predetermined engine speed.
摘要翻译： 一种用于从空燃比传感器的输出估计供给到内燃机的空气和燃料混合物的空燃比的空燃比估计器。 在估计器中，所述空燃比传感器的检测响应延迟时间近似为一阶滞后时间系统，以从所述一阶滞后时间系统产生状态方程。 将状态方程离散化为周期ΔT以获得离散状态方程。 从离散状态方程式计算传递函数，然后根据所述传递函数计算逆传递函数。 并且确定所述反向传递函数的校正系数，并且与传递函数的反向传递函数相乘估计提供给发动机的空气和燃料混合物的空燃比。 校正系数相对于发动机转速是预先确定的，并且在预定的发动机转速下为零。
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公开(公告)号：US5548514A
公开(公告)日：1996-08-20
申请号：US383204
申请日：1995-02-03
CPC分类号： F02D13/0257 , F01L1/267 , F02D13/0207 , F02D13/0215 , F02D13/0261 , F02D41/0002 , F02D41/1401 , F02D41/1443 , F02D41/1473 , F02D41/1481 , F02D2041/001 , F02D2041/1409 , F02D2041/1415 , F02D2041/1416 , F02D2041/1417 , F02D2041/1418 , F02D2041/1433 , F02D2200/0402 , F02D41/1441 , F02D41/1456 , Y02T10/18 , Y02T10/42
摘要： A system for estimating air/fuel ratios in the individual cylinders of a multicylinder internal combustion engine from an output of an air/fuel ratio sensor installed at an exhaust system of the engine. In the system, the exhaust system behavior is derived by a model in which X(k) is observed from a state equation and an output equation in which an input U(k) indicates air/fuel ratios in the individual cylinder and an output Y(k) indicates of the estimated air/fuel ratio asX(k+1)=AX(k)+BU(k)Y(k)=CX(k)+DU(k)where A, B, C and D are coefficients. And an observer is expressed by an equation using the output Y(k) as an input and the air/fuel ratios in the individual cylinders is estimated from the state variable X. In the system, the coefficient C is set to zero for a cylinder other than most recent m (2.ltoreq.m
摘要翻译： 一种用于从安装在发动机的排气系统处的空气/燃料比传感器的输出来估计多缸内燃机的各个气缸中的空气/燃料比的系统。 在该系统中，排气系统行为由其中从状态方程式观察到X（k）的模型和其中输入U（k）表示单独气缸中的空气/燃料比的输出方程和输出Y （k）表示A，B，C和D分别为X（k + 1）= AX（k）+ BU（k）Y（k）= CX（k）+ DU（k） 系数。 并且观察者由使用输出Y（k）作为输入的方程表示，并且从状态变量+ E，cir X + EE估计各个气缸中的空气/燃料比。 在系统中，除了最近的m（2 n）气缸以外的气缸，系数C被设定为零。 或者，预先准备多个观察者矩阵并同时计算。 根据发动机工作状态或在多个特性之间切换的气门正时选择计算结果之一。
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公开(公告)号：US5540209A
公开(公告)日：1996-07-30
申请号：US305279
申请日：1994-09-13
申请人： Yusuke Hasegawa , Yoichi Nishimura , Isao Komoriya , Shusuke Akazaki , Eisuke Kimura , Satoru Abe , Kei Machida
发明人： Yusuke Hasegawa , Yoichi Nishimura , Isao Komoriya , Shusuke Akazaki , Eisuke Kimura , Satoru Abe , Kei Machida
CPC分类号： F02D41/008 , F01L1/267 , F02D13/0207 , F02D13/0261 , F02D41/0002 , F02D41/1401 , F02D41/1458 , F02D41/1481 , F02D41/26 , F02D2041/001 , F02D2041/1409 , F02D2041/1415 , F02D2041/1416 , F02D2041/1417 , F02D2041/1418 , F02D2041/1433 , F02D2250/14 , F02D41/1456 , Y02T10/18 , Y02T10/42
摘要： A system for detecting air-fuel ratio of an internal combustion engine by sampling outputs of an air-fuel ratio sensor installed at an exhaust system confluence point of said engine. A timing map is prepared to be retrieved by the engine speed and manifold absolute pressure to determine one among sampled data which are successively stored in buffers. It is selected such that as the engine speed decreases or the manifold absolute pressure increases, a datum sampled at earlier crank angular position is selected. At an engine equipped with a variable valve timing mechanism, a datum sampled at earlier crank angular position is selected in the valve timing is controlled for high engine speed provided that the engine speed and manifold absolute pressure is constant. The sampled data stored in the buffers may be transferred to another buffers at a predetermined crank angular position. The sampled data is corrected by an environmental conditions including atmospheric pressure, a mixture or sensor degradation. Each buffer may have a plurality of sampled data.
摘要翻译： 一种用于通过对安装在所述发动机的排气系统汇合点处的空燃比传感器的输出进行采样来检测内燃机的空燃比的系统。 通过发动机速度和歧管绝对压力来准备定时图，以确定连续存储在缓冲器中的采样数据之一。 被选择为使得当发动机转速降低或歧管绝对压力增加时，选择在较早的曲柄角度位置处采样的基准。 在配备有可变气门正时机构的发动机中，如果发动机转速和歧管绝对压力恒定，则在气门正时选择在较高的发动机转速下选择在较早的曲柄角位置采样的基准。 存储在缓冲器中的采样数据可以在预定的曲柄角位置传送到另一缓冲器。 采样数据由包括大气压，混合物或传感器降解在内的环境条件进行校正。 每个缓冲器可以具有多个采样数据。
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公开(公告)号：US5758630A
公开(公告)日：1998-06-02
申请号：US580662
申请日：1995-12-29
CPC分类号： F02D41/008 , F02D41/1402 , F02D41/1473 , F02D41/2454 , F02D41/2477 , F02D2041/1409 , F02D2041/1415 , F02D2041/1416 , F02D2041/1417 , F02D2041/1418 , F02D2041/142 , F02D2041/1426 , F02D2041/1433 , F02D41/1456
摘要： A fuel metering control system for an internal combustion engine including a feedback loop having an adaptive controller and an adaptation mechanism that estimates a controller parameters .theta.. The adaptive controller corrects the quantity of fuel injection to bring a controlled variable obtained at least based on an output of said air/fuel ratio sensor, to a desired value. The air/fuel ratio sensor outputs are sampled and one of the sampled data is selected as the air/fuel ratio to be input to the adaptation mechanism. Similarly, the senor outputs are sampled and one of the sampled is selected in accordance with another characteristic to be used in the estimation of the air/fuel ratios of the individual cylinder. The air/fuel ratio is discriminated to be within a prescribed range, and set to a predetermined value when it is determined to be within the prescribed range.
摘要翻译： 一种用于内燃机的燃料计量控制系统，包括具有自适应控制器的反馈回路和估计控制器参数+ E，cirθ+ EE的自适应机构。 自适应控制器校正燃料喷射量，使至少基于所述空气/燃料比传感器的输出获得的受控变量达到期望值。 空气/燃料比传感器输出被采样，并且其中一个采样数据被选择为要输入到适应机构的空燃比。 类似地，传感器输出被采样，并且根据用于估计单个气缸的空气/燃料比的另一特性来选择采样中的一个。 空气/燃料比被判断为在规定范围内，并且当确定在规定范围内时将其设定为预定值。
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公开(公告)号：US5806012A
公开(公告)日：1998-09-08
申请号：US580685
申请日：1995-12-29
申请人： Hidetaka Maki , Shusuke Akazaki , Yusuke Hasegawa , Isao Komoriya , Yoichi Nishimura , Toshiaki Hirota
发明人： Hidetaka Maki , Shusuke Akazaki , Yusuke Hasegawa , Isao Komoriya , Yoichi Nishimura , Toshiaki Hirota
CPC分类号： F02D41/1402 , F02D41/1441 , F02D2041/1409 , F02D2041/1415 , F02D2041/1416 , F02D2041/1417 , F02D2041/1418 , F02D2041/142 , F02D2041/1426 , F02D2041/1431 , F02D2041/1433 , F02D41/1454 , F02D41/1456
摘要： A fuel metering control system for an internal combustion engine having a plurality of cylinders. The system includes an air/fuel ratio sensor and engine operating condition detecting means for detecting engine operating conditions at least including engine speed and engine load. The basic quantity of fuel injection is determined by retrieving mapped data according to the engine speed and engine load. An adaptive controller is provided to calculate a first feedback correction coefficient to correct the quantity of basic fuel injection such that the detected air/fuel ratio is brought to a desired value, and second feedback loop is provided for calculating feedback correction coefficients to correct the quantity of fuel injection. The desired air/fuel ratio is corrected by a second air/fuel ratio installed downstream of a catalytic converter.
摘要翻译： 一种用于具有多个气缸的内燃机的燃料计量控制系统。 该系统包括空燃比传感器和用于检测至少包括发动机转速和发动机负荷的发动机运行状况的发动机运转状态检测装置。 通过根据发动机转速和发动机负荷检索映射数据来确定燃油喷射的基本数量。 提供自适应控制器来计算第一反馈校正系数以校正基本燃料喷射量，使得检测到的空气/燃料比达到期望值，并且提供第二反馈回路用于计算反馈校正系数以校正数量 的燃油喷射。 通过安装在催化转化器下游的第二空气/燃料比来校正所需的空气/燃料比。
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公开(公告)号：US5758490A
公开(公告)日：1998-06-02
申请号：US581406
申请日：1995-12-29
申请人： Hidetaka Maki , Shusuke Akazaki , Yusuke Hasegawa , Isao Komoriya , Yoichi Nishimura , Toshiaki Hirota
发明人： Hidetaka Maki , Shusuke Akazaki , Yusuke Hasegawa , Isao Komoriya , Yoichi Nishimura , Toshiaki Hirota
CPC分类号： F02D41/008 , F02D41/1402 , F02D41/1473 , F02D2041/1409 , F02D2041/1415 , F02D2041/1416 , F02D2041/1417 , F02D2041/1418 , F02D2041/142 , F02D2041/1426 , F02D2041/1431 , F02D2041/1433 , F02D41/1456
摘要： A fuel metering control system for an internal combustion engine having a plurality of cylinders. The system includes an air/fuel ratio sensor and engine operating condition detecting means for detecting engine operating conditions at least including engine speed and engine load. The basic quantity of fuel injection is determined by retrieving mapped data according to the engine speed and engine load. An adaptive controller is provided to calculate a feedback correction coefficient to correct the quantity of basic fuel injection such that the detected air/fuel ratio is brought to a desired value. The desired air/fuel ratio is corrected by a second air/fuel ratio sensor installed downstream of a catalytic converter.
摘要翻译： 一种用于具有多个气缸的内燃机的燃料计量控制系统。 该系统包括空燃比传感器和用于检测至少包括发动机转速和发动机负荷的发动机运行状况的发动机运转状态检测装置。 通过根据发动机转速和发动机负荷检索映射数据来确定燃油喷射的基本数量。 提供自适应控制器来计算反馈校正系数以校正基本燃料喷射量，使得检测到的空气/燃料比达到期望值。 通过安装在催化转化器下游的第二空气/燃料比传感器来校正所需的空气/燃料比。
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公开(公告)号：US5758308A
公开(公告)日：1998-05-26
申请号：US580632
申请日：1995-12-29
申请人： Hidetaka Maki , Shusuke Akazaki , Yusuke Hasegawa , Isao Komoriya , Yoichi Nishimura , Toshiaki Hirota
发明人： Hidetaka Maki , Shusuke Akazaki , Yusuke Hasegawa , Isao Komoriya , Yoichi Nishimura , Toshiaki Hirota
CPC分类号： F02D41/008 , F02D41/0042 , F02D41/0072 , F02D41/009 , F02D41/045 , F02D41/1402 , F02D2041/1409 , F02D2041/1415 , F02D2041/1416 , F02D2041/1418 , F02D2041/142 , F02D2041/1433 , Y02T10/47
摘要： A fuel metering control system for an internal combustion engine having a plurality of cylinders. The system includes an air/fuel ratio sensor and engine operating condition detecting device for detecting engine operating conditions at least including engine speed and engine load. The basic quantity of fuel injection is determined by retrieving mapped data predetermined based on an effective opening area of a throttle valve, according to the engine speed and engine load. An adaptive controller is provided to calculate a feedback correction coefficient to correct the quantity of basic fuel injection such that the detected air/fuel ratio is brought to a desired value. The output quantity of fuel injection is further corrected by fuel adhered on an intake manifold wall.
摘要翻译： 一种用于具有多个气缸的内燃机的燃料计量控制系统。 该系统包括空燃比传感器和用于检测至少包括发动机转速和发动机负荷的发动机运转状况的发动机运转状态检测装置。 根据发动机转速和发动机负荷，通过检索基于节流阀的有效开口面积预先确定的映射数据来确定燃料喷射的基本量。 提供自适应控制器来计算反馈校正系数以校正基本燃料喷射量，使得检测到的空气/燃料比达到期望值。 通过附着在进气歧管壁上的燃料进一步校正燃料喷射的输出量。
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公开(公告)号：US5363648A
公开(公告)日：1994-11-15
申请号：US172896
申请日：1993-12-27
CPC分类号： F02D41/008 , F02D41/1401 , F02D41/1408 , F02D41/1443 , F02D2041/1415 , F02D2041/1416 , F02D2041/1433 , F02D41/1456
摘要： A system for controlling an air/fuel ratio of a four-cylinder internal combustion engine. In the system, an actual air/fuel ratio, at least at upstream or downstream of a catalytic converter installed at an exhaust system of the engine, is intentionally oscillated at least either in its amplitude or cycle. A characteristic of a desired air/fuel ratio as a periodic function is established with respect to time such that the desired air/fuel ratio varies at least either at a predetermined amplitude or cycle within a predetermined period. The characteristic is sampled by a time interval determined on the basis of a time interval between TDC crank angle positions of the engine. Each cylinder's desired air/fuel ratio is then determined from the sampled data, and a fuel injection amount for each cylinder is determined from the respective cylinder's desired air/fuel ratios. Fuel is then supplied to each cylinder in response to the determined fuel injection amount. The actual air/fuel ratio at each cylinder is detected or estimated and feedback controlled to the desired air/fuel ratio.
摘要翻译： 一种用于控制四缸内燃机的空燃比的系统。 在该系统中，至少在安装在发动机的排气系统处的催化转化器的上游或下游的实际空气/燃料比有意地以其振幅或循环中的至少一个振荡。 相对于时间建立期望的空气/燃料比作为周期性函数的特性，使得期望的空气/燃料比在预定时间段内至少以预定的幅度或周期变化。 基于发动机的TDC曲柄角位置之间的时间间隔确定的时间间隔对特性进行采样。 然后根据采样数据确定每个气缸所需的空气/燃料比，并且根据相应气缸的期望的空气/燃料比确定每个气缸的燃料喷射量。 响应于所确定的燃料喷射量，燃料被提供给每个气缸。 检测或估计每个气缸处的实际空气/燃料比，并将其反馈控制到所需的空气/燃料比。
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公开(公告)号：US5908463A
公开(公告)日：1999-06-01
申请号：US580690
申请日：1995-12-29
申请人： Shusuke Akazaki , Yusuke Hasegawa , Isao Komoriya , Hidetaka Maki , Yoichi Nishimura , Toshiaki Hirota
发明人： Shusuke Akazaki , Yusuke Hasegawa , Isao Komoriya , Hidetaka Maki , Yoichi Nishimura , Toshiaki Hirota
CPC分类号： F02D41/008 , F02D41/1402 , F02D41/1473 , F02D2041/1409 , F02D2041/1415 , F02D2041/1416 , F02D2041/1417 , F02D2041/1418 , F02D2041/142 , F02D2041/1426 , F02D2041/1433 , F02D41/1456
摘要： A fuel metering control system for an internal combustion engine having a plurality of cylinders. The system includes an air/fuel ratio sensor and engine operating condition detecting means for detecting engine operating conditions such as engine speed and engine load. The basic quantity of fuel injection is determined by retrieving mapped data according to the detected parameters. A plurality of controllers are provided all using outputs of the air/fuel ratio sensor. The controllers are configured to receive the sensor outputs through filters having different cutout frequency so as to avoid control interference therebetween.
摘要翻译： 一种用于具有多个气缸的内燃机的燃料计量控制系统。 该系统包括用于检测发动机运转状况如发动机转速和发动机负荷的空燃比传感器和发动机工况条件检测装置。 通过根据检测到的参数检索映射数据来确定燃料喷射的基本量。 提供了使用空/燃比传感器的输出的多个控制器。 控制器被配置为通过具有不同切断频率的滤波器接收传感器输出，以避免它们之间的控制干扰。
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公开(公告)号：US5755094A
公开(公告)日：1998-05-26
申请号：US580931
申请日：1995-12-29
申请人： Hidetaka Maki , Shusuke Akazaki , Yusuke Hasegawa , Isao Komoriya , Yoichi Nishimura , Toshiaki Hirota
发明人： Hidetaka Maki , Shusuke Akazaki , Yusuke Hasegawa , Isao Komoriya , Yoichi Nishimura , Toshiaki Hirota
CPC分类号： F02D41/008 , F02D41/1402 , F02D41/1441 , F02D2041/1409 , F02D2041/1415 , F02D2041/1416 , F02D2041/1417 , F02D2041/1418 , F02D2041/142 , F02D2041/1433 , F02D41/1456
摘要： A fuel metering control system for an internal combustion engine having a plurality of cylinders. The system includes an air/fuel ratio sensor and engine operating condition detecting means for detecting engine operating conditions at least including engine speed and engine load. The basic quantity of fuel injection is determined by retrieving mapped data according to the engine speed and engine load. An adaptive controller is provided to calculate a first feedback correction coefficient to correct the quantity of basic fuel injection such that the detected air/fuel ratio is brought to a desired air/fuel ratio, and second and third feedback loops are provided for calculating feedback correction coefficients to correct the quantity of fuel injection. The output quantity of fuel injection is determined on the basis of the basic quantity of fuel injection and the feedback correction coefficients.
摘要翻译： 一种用于具有多个气缸的内燃机的燃料计量控制系统。 该系统包括空燃比传感器和用于检测至少包括发动机转速和发动机负荷的发动机运行状况的发动机运转状态检测装置。 通过根据发动机转速和发动机负荷检索映射数据来确定燃油喷射的基本数量。 提供自适应控制器来计算第一反馈校正系数以校正基本燃料喷射量，使得检测到的空气/燃料比达到期望的空气/燃料比，并且提供第二和第三反馈回路以计算反馈校正 系数来校正燃油喷射量。 基于燃料喷射的基本量和反馈校正系数来确定燃料喷射的输出量。
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