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    • 2. 发明公开
    • Air-fuel ratio control system for internal combustion engines
    • Luft-Brennstoff-VerhältnisregelvorrichtungfürBrennkraftmaschinen
    • EP1321653A2
    • 2003-06-25
    • EP03004951.4
    • 1997-04-07
    • HONDA GIKEN KOGYO KABUSHIKI KAISHA
    • Yasui, YujiHanada, KoheiAkazaki, Shusuke
    • F02D41/14G05B13/02
    • G05B13/047F02D41/1402F02D41/1403F02D41/1441F02D41/1456F02D41/1473F02D2041/1409F02D2041/1415F02D2041/1416F02D2041/1418F02D2041/142F02D2041/1423F02D2041/1426F02D2041/1431F02D2041/1433
    • An air-fuel control system for use with an internal combustion engine (1) has a catalytic converter (4) disposed in an exhaust system (A) of the engine, for purifying an exhaust gas emitted from the engine, a first exhaust gas sensor (6) in the exhaust system for detecting an air-fuel ratio of the exhaust gas upstream of the catalytic converter, a second exhaust gas sensor (7) 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 (16) 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 (18) 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 the 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.
    • 一种与内燃机(1)一起使用的空燃控制系统具有设置在发动机的排气系统(A)中的用于净化从发动机排出的排气的催化转化器(4),第一排气传感器 (6),用于检测催化转化器上游的废气的空燃比,排气系统中的第二废气传感器(7),用于检测已经通过的废气的成分浓度 通过催化转化器,催化转化器的下游,以及校正量计算器(16),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,以使浓度 的催化转化器下游的废气的成分达到预定的适当值。 基于所确定的校正量和来自第一废气传感器的输出来控制发动机的空燃比,以将部件的浓度朝着预定的适当值收敛。 状态预测器(18)基于到目前为止的输出来估计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由第二排气传感器检测到的部件的浓度 从第一和第二废气传感器。 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。
    • 3. 发明公开
    • Air-fuel ration control system for internal combustion engines
    • 内燃机的空燃比控制系统
    • EP0799987A2
    • 1997-10-08
    • EP97302373.2
    • 1997-04-07
    • HONDA GIKEN KOGYO KABUSHIKI KAISHA
    • Yasui, YujiAkazaki, ShusukeHanada, Kohei
    • F02D41/14
    • G05B13/047F02D41/1402F02D41/1403F02D41/1441F02D41/1456F02D41/1473F02D2041/1409F02D2041/1415F02D2041/1416F02D2041/1418F02D2041/142F02D2041/1423F02D2041/1426F02D2041/1431F02D2041/1433
    • An air-fuel control system for use with an internal combustion engine (1) has a catalytic converter (4) disposed in an exhaust system (A) of the engine, for purifying an exhaust gas emitted from the engine, a first exhaust gas sensor (6) in the exhaust system for detecting an air-fuel ratio of the exhaust gas upstream of the catalytic converter, a second exhaust gas sensor (7) 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 (16) 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 (18) 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 the 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.
    • 与内燃机(1)一起使用的空气燃料控制系统具有设置在发动机的排气系统(A)中的催化转化器(4),用于净化从发动机排出的排气,第一排气传感器 (6),用于检测催化转化器上游的排气的空燃比;排气系统中的第二排气传感器(7),用于检测已经通过的排气成分的浓度 通过所述催化转换器,在所述催化转化器的下游,以及校正量计算器(16),用于基于来自所述第二排气传感器的输出来确定校正量以校正所述发动机的空燃比,以便使所述浓度 将催化转换器下游的排气成分的温度降低到预定的适当值。 基于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,以便将部件的浓度收敛到预定的适当值。 基于到目前为止的输出,状态预测器(18)在存在于包括第一和第二排气传感器之间的催化转化器的排气系统中的死时间之后,估计由第二排气传感器检测到的成分的浓度 来自第一和第二排气传感器。 校正量计算器基于估计的部件浓度来确定发动机的空燃比,以便将部件的浓度均衡到预定的适当值。