| 摘要 |
PURPOSE:To stabilize engine rotation after fuel cut, by cutting fuel supply in an O2 feed-back carburetor at deceleration, and retaining a flow control valve at a valve retaining position as set on a fuel rich side for a fixed time after releasing of fuel cut. CONSTITUTION:A feed-back control means 81 carries out a feed-back control such that it cotroles to open and close an air bleed passage 7 is a carburetor 1 by means of an electromagnetic valve 8 according to an output from an O2 sensor in an exhaust system. At deceleration of an engine, fuel is cut by a fuel cut means 32 in a control system. In restarting fuel supply after the deceleration of the engine, a valve retaining means 33 is operated to retain the electromagnetic valve 8 for air-fuel ratio control at a predetermined opening angle on a fuel rich side. Thus, rising of fuel control after the fuel cut may be improved to stabilize engine rotation. |
