Engine control device

A control device for an engine provided with an engine body having a combustion chamber, an intake passage through which intake air to be introduced into the engine body passes, an exhaust passage through which exhaust gas discharged from the engine body passes, and a turbocharger configured to boost the intake air, the control device comprising:

• a blowby gas passage connecting the engine body to the intake passage so that blowby gas leaked from the combustion chamber is recirculated to the intake passage;
• a boost pressure changer configured to change a boost pressure of the turbocharger;
• and
• a controller configured to set a target boost pressure and control the boost pressure changer so that the boost pressure becomes the target boost pressure, the target boost pressure being a target value of the boost pressure,
• wherein the turbocharger includes a turbine provided to the exhaust passage and configured to be driven by the exhaust gas, and a compressor provided to the intake passage and configured to be rotary driven by the turbine to boost the intake air,
• wherein the blowby gas passage is connected to the intake passage near the compressor, and
• wherein the controller corrects the target boost pressure when an ambient temperature is below a given determination temperature, to be higher than the target boost pressure when the ambient temperature is at or above the determination temperature.