Engine device

An apparatus for operating a vehicle, the apparatus comprising:

• an engine control unit (ECU) configured to:
• determine whether a first location associated with an engine is within a reduced emissions area;
• based on the first location being outside the reduced emissions area, enable an engine switching operation to switch an operation state of the engine;
• and
• based on the engine being within the reduced emissions area, prohibit the engine switching operation.

A method of operating a vehicle, the method comprising:

• determining whether the vehicle is within a reduced emissions area;
• and
• based on a determination that the vehicle is within the reduced emissions area:
• configuring an engine to have an operating state corresponding to a first mode in which gaseous fuel is supplied to a cylinder of the engine;
• and
• prohibiting an engine switching operation to switch the operating state of the engine from the first mode to a second mode in which liquid fuel is supplied to the cylinder.