order to provide an adequate flow of the mixture through the marginal gap or space 11 towards a main jet 3 at the apex of the conical housing 1b the cross section of the disc shaped vibrator 8 can be flat concave or convex but only the flat shape is shown in the drawing the ring shaped ultrasonic vibrator 13 is smaller in diameter than a circular groove 12 at the apex of the conical lower housing 1b suspended with elastic material 15 and kept in place with a threaded stopper 14 the inner diameter of the opening of ring shaped stopper 14 has to be larger than the diameter of vibrator 13 so that part of the vibrator forms the throat of the main jet nozzle 3 which has an outer threaded projection 4 both of the ultrasonic vibrators are connected to ultrasonic vibrators have generators 17 and 17 39 connected thereto by cables 16 and 16 39 which run through small grooves curved in the housing 1 in fig4 another version of the inventive concept is shown only two auxiliary nozzles are used and the main nozzle housing has a shape much easier to manufacture in cases where the auxiliary nozzles 5a 5b 5c are used for air injection only and the device is operated in a manner similar to supercharging the disc shaped vibrator may be eliminated as shown in fig6 since atomizing is sufficient without using a disc vibrator the fuel injection nozzle arrangement has a threaded extension on the main jet nozzle so that the whole assembly can be coupled into an intake manifold pre combustion chamber main combustion chamber etc of an engine at any desired angle one of the auxiliary nozzles 5a is used for the injection of a.