Calibrated injector assembly for feeding an internal-combustion engine, particularly for electric power generators

A calibrated injector assembly (1) for feeding internal-combustion engines (2), particularly for electric power generators, comprising a box-like body (4, 5) that forms internally a cavity (6), a duct (13) for connecting said cavity (6) to a combustion chamber of said engine (2), at least one first nozzle (18) for feeding fuel into said box-like body (4, 5) proximate to an inlet to said duct, and a plurality of holes (11) formed in said box-like body (4, 5) for feeding combustion-supporting air into said cavity (6), said holes (11) being formed in order to ensure a given stoichiometric ratio with respect to said fuel.