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

Claim 16:
17. A fuel control system for a fuel system in an engine comprising:
a fueling control unit including a solenoid energizing waveform controller structured to:
energize a solenoid actuator for a valve in a fuel injector using a boosted voltage power supply and a lower voltage power supply to adjust the valve from a first position to a second position;
switch between the boosted voltage power supply and the lower voltage power supply to generate 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, in a first engine cycle;
detect an arrival timing of the valve at the second position based on the lower voltage later current;
calculate a valve arrival time error; and
trim the fuel injector via closed loop varying of a current duration Of and a start of current timing of the boosted voltage incipient current, in a subsequent engine cycle, based on the valve arrival time error.