A tubular trembler supported on an ultrasonic vibrator is disposed almost on an axis in an engine intake pipe and has a fuel passing-through hole in the wall thereof. A fuel jet tip of the electromagnetic injection valve is disposed so as to face the fuel passing-through hole so as to jet the fuel divergently...http://www.google.de/patents/US4665877?utm_source=gb-gplus-sharePatent US4665877 - Automobile fuel feed apparatus
