System for determining malfunctions of a fuel injection control apparatus

摘要

A system is for a diesel engine 13 for detecting malfunctioning of a timer 57. The timer 57 controls an injection timing of fuel, pressurized by a pump 32, to be injected from injection nozzles 21. An electronic control unit (ECU) 81 computes a target injection timing based on the running condition. The ECU 81 controls the injection timing to set the actual injection timing to the target injection timing. The ECU 81 computes a difference between the actual injection timing and the target injection timing. The ECU 81 determines whether the injection timing control apparatus 57 is malfunctioning when the difference between the actual timing and the target timing is greater than a predetermined value. The determination by the ECU 81 is altered in accordance with the running condition of the engine 13. <IMAGE>