Patent ID: 11891962
Assignee: CATERPILLAR INC.
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC F  Y | IPC F

Claim 0:
1. A method of operating a gaseous fuel internal combustion engine system comprising:
outputting a first control command to a first fuel admission valve to admit a gaseous fuel blend containing a gaseous hydrogen fuel (H2) from a first gaseous fuel supply into a gaseous fuel engine;
outputting a second control command to a second fuel admission valve to admit additional H2 from a second gaseous fuel supply into the gaseous fuel engine;
forming a combustion charge in a cylinder in the engine from the gaseous fuel blend, the additional H2, and air;
determining, by way of the second control command, an amount of the additional H2 based on a performance target for an engine parameter varying on the basis of a relative amount of H2 in the combustion charge;
burning the combustion charge in the cylinder; and
compensating, relative to the performance target, for a varied H2 concentration in the gaseous fuel blend by way of the additional H2.