Egr control device

An EGR control device comprising:

• a drive unit configured to vary an opening degree of an EGR valve;
• a basic opening degree deriving unit configured to derive a basic EGR valve opening degree of the EGR valve on a basis of an operating condition of an engine;
• a measurement unit configured to measure a temperature in the downstream side of a position of where EGR gas is recirculated in an intake passage;
• a memory unit in which information acquired in advance is stored, the information indicating a relationship between the opening degree of the EGR valve and a temperature difference between a temperature when the EGR valve is set to the opening degree and a temperature when the EGR valve is set to a reference opening degree;
• a correction opening degree deriving unit configured to derive a correction opening degree of the EGR valve with reference to the information, based on the temperature difference between the temperature when the EGR valve is set to the reference opening degree and the temperature when the EGR valve is set to the basic EGR valve opening degree;
• and
• a control unit configured to control the drive unit such that the opening degree of the EGR valve becomes a target EGR valve opening degree obtained by correcting the basic EGR valve opening degree with the correction opening degree.