An ultrasonic fuel injector for injecting a pressurized liquid fuel into the combustion chamber of an internal combustion engine that uses an overhead cam for actuating the injector, includes an injector body and an injector needle. The injector needle is disposed within the body and includes a magnetostrictive...http://www.google.de/patents/US20020070298?utm_source=gb-gplus-sharePatent US20020070298 - Unitized injector modified for ultrasonically stimulated operation
