Control unit for motor vehicle IC engine with mode selection unit

摘要

The control unit controls a fuel injection unit (4) delivering fuel to the engine. A mode selection unit (61) selects a normal fuel regulating mode or a blocked fuel supply mode, based on the operating condition of the engine. A fuel control unit (61) controls the injection based on the mode selected. A correction unit (27-30) corrects the amount of air sucked in to the engine combustion chamber. A change RPM adjustment unit (61) adjusts a first RPM for restoring the fuel supply with a mode change from a blocked fuel supply to a normal fuel regulating mode. An increasing start RPM adjusting unit (61) adjusts a second RPM, for setting a second RPM for starting an increase and a correction of the amount of suction air before the restoration of the fuel supply, with the change of the blocked fuel mode to the normal mode, which lies on the side of higher RPMs than the first RPM. A RPM sensor detects the engine RPM. The correction unit increases the amount of suction air, and corrects, if the RPM falls to the second RPM. The fuel control unit resumes the fuel supply if the RPM falls to the first RPM value.