The injector 10 for intermittently injecting fuel under high pressure in an internal combustion engine is provided with an injector valve member (18). The movement of this injector valve member (18) to open and close a fuel discharge orifice (24) is controlled by the fuel pressure in a control chamber...http://www.google.com/patents/US4946103?utm_source=gb-gplus-sharePatent US4946103 - Electronically controlled fuel injector
