CONTROLLING METHOD AND CONTROLLER FOR INTERNAL COMBUSTION ENGINE

摘要

PROBLEM TO BE SOLVED: To detect an error in a low pressure range from an error in a high pressure range, by forming a pressure signal depending on pressure in the low pressure range, and using an error signal and the pressure signal for detecting the error. SOLUTION: A control part 150 inputs the output signals of various sensors 160 and calculates the operating control signal of an injector 131. Also, the control part 150 forms a signal by which voltage is applied which opens a pressure control valve 135 by a predetermined pressure in a high pressure range. Further, when detecting that an error occurs from the output signal of a pressure sensor 140 in the high pressure range, the control part 150 forms, for example, a control signal for disconnecting an internal combustion engine. At this time, a monitoring sub-program in a low pressure area is operated, for example, after lapse of a predetermined time, especially advantageously, after detecting the error in the high pressure range, and it is judged whether or not pressure PN in the low pressure range is smaller than a threshold value PS according to the sub-program. Then, in the case of PNPS, the marker is set to 1.