Double powering injector 1 characterized by a cylindrical conical double seal sprayer 5 able to allow the alternative injection both of gas oil and gas using only one injection system, wherein the feeding switching to the sprayer alternatively from the rail 9 or the cylinder 8 and vice versa occurs by means of an outer valve 7 of "two way - two positions" type with electronic control 12 arranged upstream of the feeding line of the accumulation volume 10 and therefore of the sprayer 5, and having two inlet connectors 15 for two separated feeding lines, the one for feeding the control volume 11 and the other one for feeding the accumulation volume 10 and so the sprayer 5.
