The invention relates to a fuel injector which requires preferably no more than about 10 pounds-force to open the fuel injector, regardless of the pressure downstream of the injector and interfacing with the injector when closed prior to injection. For instance, this low actuation force may be utilized...http://www.google.fr/patents/US5533480?utm_source=gb-gplus-shareBrevet US5533480 - Low force actuatable fuel injector
