Control device for fuel/air ratio of a multi-cylinder engine, comprises detection mechanism arranged before catalytic converter in exhaust passage for fuel/air ratio for producing a detection output corresponding to fuel/air ratio

摘要

A detection mechanism (30,31) is arranged before the catalytic converter (28,29) in the exhaust passage (26A,26B) for fuel/air ratio for producing a detection output corresponding to the fuel/air ratio. A determination unit (41) is provided for the variation of fuel/air ratio in exhaust between one cylinder and another cylinder.