| 摘要 |
PURPOSE:To check an accelerating shock, by limiting a duel-cut state to within the range of a certain period of time at all times. CONSTITUTION:Injection time Ti per stroke in a fuel injection valve 30 performing intermittent fuel feed control is expressed as in Ti=Ki.QF=Ki.QA/N+K (Ki: dependent upon the fuel injection valve 30). And, a controller 1 performs calculation by means of an expression periodically every specified period or every specified rotation in synchronous with rotation in an engine, and new injection time Ti is found at successive intervals whereby the fuel injection valve 30 is opened and driven, thus control takes place so as to secure the specified A/F mixture. On the other hand, in parallel with these processes, the controller 1 judges whether or not the engine is controlled into an engine brake state by a signal ID out of a throttle switch 35, and on the basis of results in this judgment, it is regarded as zero irrespective of the value given by an expression at that time, that is to say, the fuel injection valve 30 is controlled so as to keep it closed intact even if it is a valve-open driving period whereby fuel-cut operation takes palce. |
