Design of ultrasonic atomization transducer for use with single point injection gasoline engine 492Q

The paper describes an electronically controlled fuel atomization apparatus for use on single point injection engines 492Q, consisting of an electronic oscillator and an ultrasonic atomization transducer. The transducer vibrates ultrasonically to break up the fuel into fine droplets. Based on the engine's rate of fuel flow and the desired fuel droplet diameter for complete combustion, the frequency of ultrasonic vibration and its power rating are calculated. The material, structure and dimensions of the transducer are determined according to ultrasonic atomization theory and fuel injection nozzle configuration. Finite element analysis is carried out to avoid possible resonance of the transducer from excitations originating in the vehicle.