Controller for supercharger-equipped internal combustion engine

A controller for an internal combustion engine equipped with a supercharger having a turbine provided in an exhaust path, a compressor that is provided at the upstream side of a throttle valve in an intake path and rotates integrally with the turbine, a wastegate valve provided in a bypass, in the exhaust path, that bypasses the turbine, and a gate valve actuator that drives the wastegate valve, the controller comprising at least one processor configured to implement:

• a driving-condition detector that detects a real rotation speed of the supercharger;
• a target compressor driving force calculator that calculates a target compressor driving force, which is a target value of driving force for the compressor;
• a real compressor driving force calculator that calculates real compressor driving force, which is a real value of driving force for the compressor;
• a supercharger inertial force calculator that calculates inertial force produced by an inertial moment of the supercharger, based on the real rotation speed of the supercharger;
• and
• a gate valve control value calculator that implements driving force feedback control for changing a gate valve control value, which is a control value for the gate valve actuator, so that an addition value obtained by adding the inertial force to the real compressor driving force approaches the target compressor driving force, and controls the gate valve actuator to drive the wastegate valve based on the gate valve control value.