Engine device

An engine device installed in a vehicle, the engine device comprising:

• an engine that has a throttle valve disposed in an intake pipe and a fuel injection valve, and outputs power using fuel supplied from a fuel tank;
• an air-fuel ratio sensor mounted on an exhaust pipe of the engine;
• a turbocharger having a compressor disposed in the intake pipe, upstream of the throttle valve;
• an evaporated fuel processing device having
• a supply passage that splits into a first purge passage and a second purge passage that are connected to the intake pipe and supplies an evaporated fuel gas containing evaporated fuel generated inside the fuel tank to the intake pipe,
• an ejector having an intake port connected to a circulation passage extending from the intake pipe, between the compressor and the throttle valve, an exhaust port connected to the intake pipe, upstream of the compressor, and a suction port connected to the second purge passage, and
• a purge control valve provided in the supply passage;
• and
• a controller, wherein:
• the controller executes fuel injection control of the engine by setting a required injection amount using a required load ratio of the engine and an air-fuel ratio correction amount that is related to deviation of the air-fuel ratio sensor;
• when setting conditions are met, the controller sets the air-fuel ratio correction amount for a corresponding region to which a current intake air amount or load ratio of the engine belongs among a plurality of regions into which a range of the intake air amount or the load ratio of the engine is divided such that a region of a larger intake air amount or a higher load ratio becomes wider than a region of a smaller intake air amount or a lower load ratio;
• when purge conditions are met, the controller controls the purge control valve by setting a driving duty of the purge control valve such that purge of supplying the evaporated fuel gas to the intake pipe is executed based on a required purge ratio;
• and
• in a natural aspiration region, the purge conditions include a condition that there is a setting history of the air-fuel ratio correction amount for the corresponding region, and in a supercharging region, the purge conditions include a condition that the air-fuel ratio correction amount for the corresponding region has been set in a current trip.