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AssigneeCaterpillar Inc.
InventorsNadeem Bunni, Daniel R. Puckett, Jay Venkataraghavan, Stephen R. Lewis, Angela L. Moore
Estimating the term…
An efficient control wave form is utilized to actuate the solenoids of a fuel system to reduce boost power/energy consumption. The solenoid is initially energized by applying a boost voltage from an electronic controller across a solenoid coil circuit. The electronic controller monitors the current level in the solenoid coil circuit, and changes to a reduced battery voltage when the current level in the solenoid coil circuit reaches a predetermined trigger current. The controller then maintains a pull-in current based upon battery voltage for a pull-in duration that initiates movement of the solenoid armature from an initial air gap position toward a final air gap position. After the pull-in duration, the current level is dropped to a hold in level for the remaining duration of the actuation event. The solenoid may be used for fuel injector control and/or pump control, such as to control fuel injection and pumping events respectively.
A method of operating a fuel system for an engine, the method comprising the steps of:
An electronic controller for a fuel system of an engine, comprising
A method of operating a solenoid of a fuel injector for an engine, the method comprising the steps of:
Dependencies are inferred from the claim text.