Control device for controlling control pressure in common rail fuel injection system for supplying fuel to internal combustion engine, has protection-correction device for correcting protection value that defines limit of integral portion

摘要

The device (10) has a target pressure computation device (45) for calculating target pressure of fuel in a bus bar, and an actual pressure detection device (31) for detecting actual pressure of the fuel in the bus bar. An integral portion protection-correction device (47) corrects a protection value in an expanding direction when the actual pressure differs from the target pressure. A regulating unit is controlled by a control value, where the protection value defines an upper limit and/or a lower limit of an integral portion in a regulation portion.