Fuel injection control system for engine

摘要

A fuel injection control system for an engine having a plurality of cylinders includes a plurality of driver units for actuating fuel injection valves on the respective cylinders, a processing unit for starting processing operation in synchronism with a cycle of operation of the cylinders when the engine is in a normal operation mode, to compute times for which the fuel injection valves are to be opened based on an engine operating condition in the normal operation mode and to issue processed data, and for starting processing operation out of synchronism with the cycle of operation when the engine is in a particular operation mode, to compute times for which the fuel injection valves are to be opened based on an engine operating condition in the particular operation mode and to issue processed data, and a plurality of counters for successively opening the fuel injection valves through the driver units based on the processed data set in the counters and corresponding to the computed times from the processing means when the engine is in the normal operation mode. The fuel injection control system also includes a counter operation discriminating unit for detecting those counters which are not in operation when the engine is in the particular operation mode and generating a discrimination singal, and a processed data assigning unit responsive to the discrimination signal for assigning the processed data computed in the particular operation mode to those counters which are not in operation.