Patent ID: 8316825

Claim:
A fuel injector having field replaceable components exchangeable to change at least one of said fuel injector's characteristics, said fuel injector comprising: an electrical power connector adapted to receive a fuel injector energization signal; an electrical actuating coil electrically coupled to said electrical power connector and powered by said fuel injector energization signal to controllably produce a magnetic field; a ferromagnetically responsive needle movable responsive to variations in said magnetic field; a valve seat having a fuel passage therethrough, said fuel passage selectively closed or opened by said movement of said ferromagnetically responsive needle; a fuel inlet for receiving fuel into said fuel passage; a flow disk receiving fuel from said fuel passage and dispersing said fuel within an internal combustion engine; and a housing enclosing said electrical actuating coil, said ferromagnetically responsive needle, said valve seat, and said flow disk, said housing having a fuel inlet and a fuel outlet and further having a field removable and replaceable closure which provides field access to and replacement of said field replaceable components and thereby change at least one of said fuel injector's characteristics; each of said field replaceable components further comprising indicia which uniquely allow visual identification of a particular performance characteristic attained when said field replaceable components are incorporated into said fuel injector.