ELECTRONIC THROTTLE CONTROL DEVICE FOR INTERNAL COMBUSTION ENGINE

摘要

PROBLEM TO BE SOLVED: To precisely control a throttle. SOLUTION: A target cylinder filled air amount computing means 61 computes a target cylinder filed air amount in accordance with required torque as illustrated and basic target intake pressure computing means 62 computes a basic target intake pressure in accordance with the target cylinder filled air amount and an engine speed. Correcting means 63 corrects the basic target intake pressure depending on predetermined parameters as variation factors of an intake pressure to find a target intake pressure and target throttle opening computing means 68 computes a target throttle opening in accordance with the target intake pressure and the target cylinder filled air amount and controls a throttle actuator 14 in accordance with the target throttle opening. When the intake pressure detected by an intake pressure sensor 18 is a preset lower limit value or lower for the target intake pressure, the target intake pressure is set to be the lower limit value for the target intake pressure and the target cylinder filled air amount is set to be a lower limit value for the target cylinder filled air amount corresponding to the lower limit value for the target intake pressure.