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    Air-fuel ratio control system for internal combustion engines
    82.
    发明授权
    Air-fuel ratio control system for internal combustion engines 失效
    内燃机空燃比控制系统

    公开(公告)号：US5924281A

    公开(公告)日：1999-07-20

    申请号：US835192

    申请日：1997-04-04

    申请人： Yuji Yasui ,  Shusuke Akazaki ,  Kohei Hanada

    发明人： Yuji Yasui ,  Shusuke Akazaki ,  Kohei Hanada

    IPC分类号： F02D45/00 ,  F01N3/24 ,  F02D41/14 ,  G05B13/04 ,  F01N3/00

    CPC分类号： G05B13/047 ,  F02D41/1403 ,  F02D41/1441 ,  F02D41/1473 ,  F02D2041/1409 ,  F02D2041/1415 ,  F02D2041/1416 ,  F02D2041/1418 ,  F02D2041/142 ,  F02D2041/1423 ,  F02D2041/1426 ,  F02D2041/1431 ,  F02D2041/1433 ,  F02D41/1402 ,  F02D41/1456

    摘要： An air-fuel control system for use with an internal combustion engine has a catalytic converter disposed in an exhaust system of the engine, for purifying an exhaust gas emitted from the engine, a first exhaust gas sensor in the exhaust system for detecting an air-fuel ratio of the exhaust gas upstream of the catalytic converter, a second exhaust gas sensor in the exhaust system for detecting the concentration of a component of the exhaust gas which has passed through the catalytic converter, downstream of the catalytic converter, and a correction quantity calculator for determining a correction quantity to correct an air-fuel ratio of the engine based on an output from the second exhaust gas sensor so as to equalize the concentration of the component of the exhaust gas downstream of the catalytic converter to a predetermined appropriate value. The air-fuel ratio of the engine is controlled based on the determined correction quantity and an output from the first exhaust gas sensor so as to converge the concentration of the component toward the predetermined appropriate value. A state predictor estimates the concentration of the component, detected by the second exhaust gas sensor, after a dead time present in an exhaust system including the catalytic converter between the first and second exhaust gas sensors, based on outputs up to present from the first and second exhaust gas sensors. The correction quantity calculator determines the air-fuel ratio of the engine so as to equalize the concentration of the component to the predetermined appropriate value, based on the estimated concentration of the component.

    摘要翻译： 一种与内燃机一起使用的空燃控制系统具有：催化转化器，其设置在发动机的排气系统中，用于净化从发动机排出的排气;排气系统中的第一排气传感器， 催化转化器上游的废气的燃料比，用于检测已经通过催化转化器的排气的成分浓度的排气系统中的第二废气传感器，以及催化转化器的下游的校正量 计算器，用于基于来自第二排气传感器的输出确定校正量以校正发动机的空燃比，以将催化转化器下游的排气的成分的浓度均匀化到预定的适当值。 基于所确定的校正量和来自第一排气传感器的输出来控制发动机的空燃比，以将部件的浓度朝向预定的适当值收敛。 状态预测器基于从第一和第二废气传感器到目前的输出，在包括第一和第二废气传感器之间的催化转化器的排气系统中存在的死区时间之后，估计由第二废气传感器检测到的部件的浓度， 第二排气传感器。 校正量计算器基于所估计的组分浓度，确定发动机的空燃比，以将组分的浓度与预定的适当值相等。

    Air-fuel ratio estimator for internal combustion engine
    87.
    发明授权
    Air-fuel ratio estimator for internal combustion engine 失效
    内燃机空燃比估计

    公开(公告)号：US5569847A

    公开(公告)日：1996-10-29

    申请号：US517855

    申请日：1995-08-22

    申请人： Yusuke Hasegawa ,  Yoichi Nishimura ,  Isao Komoriya ,  Shusuke Akazaki ,  Eisuke Kimura

    发明人： Yusuke Hasegawa ,  Yoichi Nishimura ,  Isao Komoriya ,  Shusuke Akazaki ,  Eisuke Kimura

    IPC分类号： F02D41/14 ,  F02D45/00 ,  G01M15/04 ,  G01L3/26 ,  G01L5/13

    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。

    Fuel metering control system for internal combustion engine
    88.
    发明授权
    Fuel metering control system for internal combustion engine 失效
    内燃机燃油计量控制系统

    公开(公告)号：US5558076A

    公开(公告)日：1996-09-24

    申请号：US514857

    申请日：1995-08-14

    申请人： Hidetaka Maki ,  Shusuke Akazaki ,  Yusuke Hasegawa ,  Yoichi Nishimura

    发明人： Hidetaka Maki ,  Shusuke Akazaki ,  Yusuke Hasegawa ,  Yoichi Nishimura

    IPC分类号： F01L1/26 ,  F02D13/02 ,  F02D41/00 ,  F02D41/14 ,  F02D43/00

    CPC分类号： F02D41/1402 ,  F01L1/267 ,  F02D13/0215 ,  F02D13/0261 ,  F02D41/0002 ,  F02D2041/001 ,  F02D2041/1409 ,  F02D2041/1415 ,  F02D2041/142 ,  F02D2041/1426 ,  F02D2041/1433 ,  Y02T10/18 ,  Y02T10/42

    摘要： A fuel metering control system for an internal combustion engine, having a feedback loop. In the system, the quantity of fuel injection (Tim) to be supplied to the engine (plant) is determined outside of the feedback loop. A first feedback correction coefficient (KSTR) is calculated using an adaptive law, while a second feedback correction coefficient (KLAF(KSTRL)), whose control response is inferior to the first feedback correction coefficient is calculated using a PID control law. The feedback correction coefficients are calculated such that the plant output (air/fuel ratio) is brought to a desired value (desired air/fuel ratio). The engine is equipped with a variable valve timing mechanism which switches the valve timing between characteristics for low engine speed and those for high engine speed. If the characteristic for high engine speed is selected, the second feedback correction coefficient is used for fuel injection quantity correction.

    摘要翻译： 一种用于内燃机的燃料计量控制系统，具有反馈回路。 在该系统中，在反馈回路之外确定要供应给发动机（工厂）的燃料喷射量（Tim）。 使用自适应规律计算第一反馈校正系数（KSTR），而使用PID控制定律计算其控制响应低于第一反馈校正系数的第二反馈校正系数（KLAF（KSTRL））。 计算反馈校正系数，使得工厂输出（空气/燃料比）达到期望值（期望的空气/燃料比）。 该发动机配备有可变气门正时机构，可在低发动机转速的特性与高发动机转速的特性之间切换气门正时。 如果选择高发动机转速的特性，则将第二反馈校正系数用于燃料喷射量校正。

    Fuel metering control system in internal combustion engine
    89.
    发明授权
    Fuel metering control system in internal combustion engine 失效
    内燃机燃油计量控制系统

    公开(公告)号：US5349933A

    公开(公告)日：1994-09-27

    申请号：US137344

    申请日：1993-10-18

    申请人： Yusuke Hasegawa ,  Shusuke Akazaki ,  Isao Komoriya ,  Hidetaka Maki ,  Toshiaki Hirota

    发明人： Yusuke Hasegawa ,  Shusuke Akazaki ,  Isao Komoriya ,  Hidetaka Maki ,  Toshiaki Hirota

    IPC分类号： F02D41/04 ,  F02D41/14 ,  F02D41/18 ,  F02D41/10

    CPC分类号： F02D41/182 ,  F02D41/045 ,  F02D41/1401 ,  F02D2041/1431 ,  F02D2041/1433 ,  F02D2200/0402

    摘要： A system for controlling fuel metering in an internal combustion engine using a fluid dynamic model and the cylinder air flow past the throttle is determined therefrom. Based on the observation that the difference between a steady-state engine operating condition and a transient engine operating condition can be described as the difference in the effective throttle opening areas, the amount of fuel injection is determined from the product of the ratio between the areas and a basic fuel injection amount under the steady-state engine operating condition obtained by mapped data retrieval and by subtracting a correction amount corresponding to an air flow filling a chamber between the throttle and the cylinder from the product. Under steady-state engine operation, the correction amount becomes zero. In an embodiment, the first-order lag of a detected throttle opening is calculated and based on the value, various parameters including a pseudo manifold pressure are obtained so as to solve sensors' detection timing lag or a pressure sensor's detection lag.

    摘要翻译： 使用流体动力学模型来控制内燃机中的燃料计量的系统和通过油门的气缸气流被确定。 基于将稳态发动机运转状态与瞬时发动机运转状态之间的差可以描述为有效节气门开度面积的差异的观察结果，燃料喷射量根据区域之间的比率 以及在通过映射数据检索获得的稳态发动机运行状态下的基本燃料喷射量，并且从产品中减去与填充节气门和气缸之间的室的空气流相对应的校正量。 在稳态发动机运行下，校正量变为零。 在一个实施例中，计算检测到的节气门开度的一阶滞后，并且基于该值，获得包括伪歧管压力的各种参数，以便解决传感器的检测定时滞后或压力传感器的检测滞后。

    Air-fuel ratio control system for internal combusion engines
    90.
    发明授权
    Air-fuel ratio control system for internal combusion engines 失效
    内燃机发动机空燃比控制系统

    公开(公告)号：US5253630A

    公开(公告)日：1993-10-19

    申请号：US945519

    申请日：1992-09-16

    申请人： Shusuke Akazaki ,  Kotaro Miyashita

    发明人： Shusuke Akazaki ,  Kotaro Miyashita

    IPC分类号： F02B29/08 ,  F02D41/04 ,  F02D41/06 ,  F02D41/14 ,  F02D41/16

    CPC分类号： F02D41/1475 ,  F02D41/1486 ,  F02B2275/18 ,  F02D41/1456

    摘要： An air-fuel ratio control system for an internal combustion engine controls the air-fuel ratio of a mixture supplied to the engine to a desired air-fuel ratio in response to an output from an exhaust gas ingredient concentration sensor. A first value of the desired air-fuel ratio is calculated based on the rotational speed of the engine and the load on the engine. A second value of the desired air-fuel ratio is calculated based results of determination on whether a vehicle on which the engine is installed has just started from a standing position thereof. A third value of the desired air-fuel ratio is calculated based on results of determination on whether the temperature of the engine is lower than a predetermined value. The largest value of at least the first to third values of the desired air-fuel ratio is set to a final value of the desired air-fuel ratio.