Control device for internal combustion engine

A control device for an internal combustion engine having a compressor disposed in an intake passage, a throttle disposed downstream from the compressor in the intake passage, and an EGR valve disposed in an EGR passage connecting an exhaust passage and an upstream side from the compressor in the intake passage, which is configured to operate the throttle so as to increase a charging efficiency of an in-cylinder gas, and operate the EGR valve to increase an EGR rate of the in-cylinder gas, in an acceleration operation, the control device comprising:

• at least one processor;
• and
• at least one memory including at least one computer program, the at least one memory and the at least one computer program configured, with the at least one processor, to cause the control device at least to operate as:
• target charging efficiency determination means for determining a target charging efficiency, the target charging efficiency determination means being configured to increase the target charging efficiency in accordance with a magnitude of acceleration requested of the internal combustion engine;
• target throttle opening degree arithmetic operation means for calculating a target throttle opening degree based on the target charging efficiency, the target throttle opening degree arithmetic operation means being configured to select to calculate the target throttle opening degree by a first arithmetic operation, and to calculate the target throttle opening degree by a second arithmetic operation by which an increase speed of a throttle opening degree is restrained more than by the first arithmetic operation;
• and
• prediction means for predicting whether temporary reduction occurs to a charging efficiency of fresh air in the in-cylinder gas by an influence of the EGR rate of the in-cylinder gas which increases later than increase of the charging efficiency of the in-cylinder gas if the first arithmetic operation is applied to calculation of the target throttle opening degree based on the target charging efficiency which is increasing, in a case of shifting to the acceleration operation, by using a prediction model expressing dynamic characteristics of the internal combustion engine,
• wherein the target throttle opening degree arithmetic operation means is configured to
• select to calculate the target throttle opening degree by the first arithmetic operation when the prediction means does not predict that the temporary reduction occurs to the charging efficiency of the fresh air in the in-cylinder gas, and
• select to calculate the target throttle opening degree by the second arithmetic operation when the prediction means predicts that temporary reduction occurs to the charging efficiency of the fresh air in the in-cylinder gas.