Patent ID: 11946430
Assignee: CATERPILLAR INC.
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC F | IPC F

Claim 0:
1. A method of controlling a fuel injector in a fuel system for an engine comprising:
switching between a boosted voltage power supply and a lower voltage power supply during energizing a solenoid actuator to move a valve in a fuel injector from a first position to a second position, and wherein the first position includes an open position and the second position includes a closed position;
generating a solenoid energizing waveform including a pull-in tier produced by a boosted voltage incipient current, a boosted voltage second current, and a lower voltage later current following the boosted voltage second current, based on the switching between the boosted voltage power supply and the lower voltage power supply;
detecting an arrival timing of the valve at the second position based on a property of the lower voltage later current; and
trimming the fuel injector via varying the boosted voltage incipient current, based on the detecting the arrival timing of the valve at the second position.