US 12,110,832 B2
Fuel injector control system and method
Andrew O. Marrack, Peoria, IL (US); and Mitchell B. Juchems, Tremont, IL (US)
Assigned to Caterpillar Inc., Peoria, IL (US)
Filed by Caterpillar Inc., Peoria, IL (US)
Filed on Aug. 3, 2022, as Appl. No. 17/817,036.
Prior Publication US 2024/0044299 A1, Feb. 8, 2024
Int. Cl. F02D 41/20 (2006.01); F02D 41/40 (2006.01)
CPC F02D 41/20 (2013.01) [F02D 41/401 (2013.01); F02D 2041/2048 (2013.01); F02D 2041/2055 (2013.01); F02D 2041/2058 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A fuel injection method, comprising:
detecting an actuation timing of a first valve of a fuel injector;
detecting an actuation timing of a second valve of the fuel injector;
detecting a return timing of the first valve of the fuel injector based on induced current that is generated by motion of the first valve;
detecting a return timing of the second valve of the fuel injector based on induced current that is generated by motion of the second valve; and
for one or more fuel injection waveforms that are generated according to commands from an electronic control module for injecting fuel, modifying at least one of:
a maximum amplitude of solenoid current,
an average amplitude of solenoid current,
a start time of solenoid current,
an end time of solenoid current, or
a total time of solenoid current,
the modification being performed based on the actuation timing of the first valve, the actuation timing of the second valve, the return timing of the first valve, and the return timing of the second valve.