Patent ID: 6418913
Filing Date: 2002-07-16
Classification: F02D

Abstract:
A fuel injector for injecting fuel into a combustion chamber of an internal combustion engine comprising:a body containing a mechanism that is operable to cause fuel to be injected out of the body and into the combustion chamber; an electric actuator for operating the mechanism to initiate a fuel injection from the body when an initiating electric signal for initiating a fuel injection is applied to the electric actuator and to terminate the fuel injection when the electric signal changes to a terminating electric signal for terminating the fuel injection, and an identity circuit that possesses a characteristic identifying a calibration category into which the fuel injector has been previously categorized and that responds to an interrogating signal in a manner disclosing the calibration category into which the fuel injector has been categorized; wherein the identity circuit is electrically connected in its entirety in shunt with the electric actuator so as to thereby impose no significant effect on the response of the fuel injector to the initiating and terminating electric signals, and the electric actuator imposes no significant effect on the response of the identity circuit to the interrogating signal.