US 11,873,772 B1
Dual fuel engine system and method for controlling dual fuel engine system
Travis Alva Anderson, Columbus, IN (US); Axel O. zur Loye, Columbus, IN (US); Mark A. Rosswurm, Columbus, IN (US); Paul Daniel Borisuk, Nashville, IN (US); Shashank Bishnoi, Columbus, IN (US); Matthew W. Isaacs, Moncks Corner, SC (US); Jason A. Gore, Highland Village, TX (US); Atin Tandon, Greenwood, IN (US); and Jamie Robert John Sleigh, Chester le Street (GB)
Assigned to Cummins Power Generation Inc., Minneapolis, MN (US)
Filed by Cummins Power Generation Inc., Minneapolis, MN (US)
Filed on Sep. 14, 2022, as Appl. No. 17/944,910.
Int. Cl. F02D 41/00 (2006.01); F02D 41/24 (2006.01); F02D 41/14 (2006.01)
CPC F02D 41/0027 (2013.01) [F02D 41/1401 (2013.01); F02D 41/1446 (2013.01); F02D 41/2422 (2013.01); F02D 2041/141 (2013.01); F02D 2041/1409 (2013.01); F02D 2200/0606 (2013.01); F02D 2200/0612 (2013.01); F02D 2200/10 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A method for controlling a dual fuel engine system, the method comprising:
determining a gas flow target for an internal combustion engine of the dual fuel engine system, the gas flow target being based on a gas power target of the internal combustion engine, a thermal efficiency estimate of the internal combustion engine, and a lower heating value (LHV) within the internal combustion engine;
adjusting the gas flow target based on at least one of a measured gas temperature or a measured gas injector pressure;
determining at least one base gas injector command based on the adjusted gas flow target, a gas substitution rate estimate, and a gas substitution rate target; and
determining, based on the at least one base gas injector command, a gas injector command for at least one engine bank,
wherein determining the gas flow target comprises dividing the gas power target by the thermal efficiency estimate and the LHV.