Patent Number: 6,167,869

Title: Fuel injector utilizing a multiple current level solenoid

Abstract: A fuel injector includes first and second valves and a solenoid including a solenoid coil and an armature assembly wherein the first and second valves are coupled to the armature assembly. A solenoid drive circuit is coupled to the solenoid coil and delivers a first current waveform portion to the solenoid coil at a first time to cause the armature assembly to operate the first valve without operating the second valve. A second current waveform portion different than the first current waveform portion is applied to the solenoid coil at a second time later than the first time to operate the second valve.

Inventors: Martin; David E. (Normal, IL), Forck; Glen F. (Peoria, IL), Coldren; Dana R. (Fairbury, IL), Schneider; Marvin P. (East Peoria, IL), Ramalingam; Prabhakar (Normal, IL)

Assignee: Caterpillar Inc.

International Classification: F02M 59/00 (20060101); F02M 59/46 (20060101); F02M 57/00 (20060101); F02M 59/20 (20060101); F02M 59/36 (20060101); F02M 57/02 (20060101); F02M 037/04 ()

Expiration Date: 01/02/2018