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31. 发明授权

US5845490A Air-fuel ratio control system for internal combustion engines 失效
标题翻译：内燃机空燃比控制系统
公开(公告)号：US5845490A
公开(公告)日：1998-12-08
申请号：US833092
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 , G05B13/02
CPC分类号： F02D41/1441 , F02D41/1403 , G05B13/0255 , F02D2041/1409 , F02D2041/1415 , F02D2041/1416 , F02D2041/1418 , F02D2041/142 , 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, a first exhaust gas sensor, and a second exhaust gas sensor. A sliding mode controller determines a correction quantity to equalize the concentration of the component downstream of the catalytic converter to a predetermined appropriate value based on the output from the second exhaust gas sensor. A feedback controller determines a correction quantity to converge the concentration of the component downstream of the catalytic converter toward the predetermined appropriate value, and feed-back controls the rate at which fuel is supplied to the engine with the determined correction quantity. The sliding mode controller has a hyperplane setting unit for establishing a hyperplane for the sliding mode control process with a linear function having as variables a plurality of quantities of the exhaust system which include at least the concentration, detected by the second exhaust gas sensor, of the component of the exhaust gas downstream of the catalytic converter and a rate of change of the concentration, and a calculator for determining the correction quantity to correct the air-fuel ratio of the internal combustion engine so as to converge the state quantities onto the established hyperplane and also to converge the state quantities toward a balanced point on the established hyperplane while converging the state quantities onto the hyperplane. The hyperplane setting unit variably establishes the hyperplane depending on the manner in which the state quantities converge onto the hyperplane.
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，第一废气传感器和第二废气传感器。滑动模式控制器基于来自第二排气传感器的输出，确定校正量以使催化转化器下游的组分的浓度相等于预定的适当值。反馈控制器确定校正量以使催化转化器下游的部件的浓度朝向预定的适当值收敛，并且反馈控制以确定的校正量向发动机供应燃料的速率。滑动模式控制器具有超平面设置单元，用于为滑模模式控制过程建立超平面，其中线性函数具有作为变量的多个排气系统的数量，排气系统至少包括由第二排气传感器检测的浓度催化转化器下游的废气的成分和浓度的变化率;以及计算器，用于确定校正量，以校正内燃机的空燃比，以将状态量收敛到已建立的并且还将状态量收敛到建立的超平面上的平衡点，同时将状态量收敛到超平面上。超平面设置单元根据状态量收敛到超平面上的方式，可变地建立超平面。

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