Patent ID: 11873772
Assignee: CUMMINS POWER GENERATION LIMITED
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC F  Y | IPC F

Claim 9:
10. A dual fuel engine system for an internal combustion engine, the dual fuel engine system comprising:
at least one gas injector operably coupled to the internal combustion engine having a left bank and a right bank, the internal combustion engine being operable in a dual fuel mode;
at least one proportional-integral-derivative (PID) controller communicably coupled to the internal combustion engine and the at least one gas injector; and
at least one other controller communicably coupled to the internal combustion engine and the at least one gas injector;
wherein the at least one PID controller is configured to:
receive a feedforward input, a gas substitution rate estimate, and a gas substitution rate target;
output, based on the feedforward input, at least one gas injector command; and
bias the at least one gas injector command to each of the right bank and the left bank based on an exhaust temperature difference associated with each of the right bank and the left bank; and

wherein the at least one other controller is configured to determine a gas flow target for the internal combustion engine by dividing a gas power target of the internal combustion engine by a thermal efficiency estimate and a lower heating value (LHV), wherein the LHV is determined on a look-up table based on an estimated methane number.