Patent ID: 11898508
Assignee: HITACHI ASTEMO, LTD.
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC F  Y | IPC F

Claim 11:
12. An internal combustion engine control device that controls an internal combustion engine including an intercooler that cools intake air and an EGR flow path pipe that recirculates a part of exhaust gas in an exhaust path to an upstream side of the intercooler as EGR gas,
the internal combustion engine control device comprising:
a moisture amount calculation unit configured to calculate a total moisture amount contained in a mixed gas obtained by mixing fresh air flowing into the intercooler and the EGR gas;
a dew condensation calculation unit configured to calculate a dew condensation generation amount in the intercooler based on the total moisture amount calculated by the moisture amount calculation unit; and
an EGR correction unit configured to correct a flow rate of the EGR gas to be recirculated based on the dew condensation generation amount calculated by the dew condensation calculation unit,
wherein the EGR correction unit corrects a flow rate of the EGR gas such that a combustion speed when dew condensation occurs in the intercooler is a same as a combustion speed when no dew condensation occurs, and
wherein the EGR correction unit calculates the combustion speed based on an in-cylinder pressure of a cylinder constituting the internal combustion engine, an in-cylinder temperature of the cylinder, an equivalent ratio, and an EGR rate.