Fuel amount distribution method for an engine with a dual injector

A fuel amount distribution method for distributing fuel to a plurality of injectors provided on each of multiple cylinders of an engine with a dual injector, the method comprising:

• determining, by a controller, whether a required fuel injection time of the dual injector of at least one cylinder of the multiple cylinders is less than a minimum injection time of each injector of the plurality of injectors of the dual injector;
• performing, by the controller, a single injection operation in which a single injector of the plurality of injectors constituting the dual injector injects fuel into a corresponding cylinder when the required fuel injection time of the dual injector of the at least one cylinder of the multiple cylinders is less than the minimum injection time of each injector of the plurality of injectors of the dual injector, and
• compensating, by the controller, for the minimum injection time of each of the injectors by utilizing a preset compensation map, when a fuel injector operation is converted from a dual injection operation in which the plurality of injectors of the dual injector injects fuel, into the single injection operation using the single injector, or when the fuel injector operation is converted from the single injection operation to the dual injection operation,
• wherein the individual injectors constituting the dual injector periodically alternately perform the single injection operation.