FUEL INJECTION CONTROL DEVICE FOR INTERNAL COMBUSTION ENGINE

摘要

A pressure-reducing part (60), which reduces the pressure of a fuel gas supplied to first injection valves (21), and a main tank stop valve (44) and a cutoff valve (45) are disposed in a fuel passage comprising a gas pipe (41) and the like. A control unit (80) monitors the appearance of changes in injection pressure, which is the pressure of the fuel gas supplied to the first injection valves (21), and on the basis of the appearance of changes in the injection pressure, determines whether the occurrence of an abnormality is due to abnormal leakage of the fuel gas in the pressure-reducing part (60), or due to an abnormal leakage of the fuel gas in the cutoff valve (45).