Engine control device and control method thereof

摘要

An engine control device and method that prevents fuel injection quantity from becoming unstable due to a rapid change of a correction quantity even in a predetermined operation state such as acceleration time and thus stabilizes an air-fuel ratio. Under a predetermined operating state, even when feedback control of oxygen in exhaust gas is stopped, a correction quantity immediately before the predetermined operating state is held by a correction quantity storage part and the correction of the fuel injection time is performed based on the correction quantity.