公开(公告)号：US5119629A

公开(公告)日：1992-06-09

申请号：US372562

申请日：1989-06-28

申请人： Tateo Kume ,  Reijiro Komagome ,  Katsuo Akishino ,  Yoshiaki Kodama ,  Michiyasu Yoshida ,  Toshio Yuminaka

发明人： Tateo Kume ,  Reijiro Komagome ,  Katsuo Akishino ,  Yoshiaki Kodama ,  Michiyasu Yoshida ,  Toshio Yuminaka

IPC分类号： F02D41/14

CPC分类号： F02D41/1487 ,  F02D41/1408

摘要： A method of and an apparatus for controlling the air fuel ratio of an internal combustion engine by which the air fuel ratio can be controlled so that the exhaust gas purifying efficiency of a catalytic converter for purifying exhaust gas of the engine may be maximum. In the apparatus, exhaust gas of the engine is first passed through a catalytic converter and then is introduced into an oxygen concentration sensor of the .lambda. type. When the air fuel ratio is compulsorily varied, the compulsorily varied condition of the air fuel ratio such as an average of variations of the air fuel ratio (average air fuel ratio) is corrected in accordance with an output of the oxygen concentration sensor thereby to control the air fuel ratio so that the purifying efficiency of the exhaust gas purifying catalytic converter may be maximum.

摘要翻译： 用于控制可以控制空燃比的内燃机的空燃比的方法和装置，使得用于净化发动机废气的催化转化器的废气净化效率最大。 在该装置中，首先将发动机的废气通过催化转化器，然后引入到λ型的氧浓度传感器中。 当空燃比强制变化时，根据氧浓度传感器的输出来校正诸如空燃比（平均空燃比）的变化的平均值的空燃比的强制变化状态，从而控制 空燃比使排气净化催化剂的净化效率最大化。