Patent ID: 11913392
Assignee: CUMMINS INC.
Field: Measurement (Instruments)
Classification: CPC F  G | IPC F

Claim 0:
1. A method of operating an engine system, comprising:
determining a first characteristic of a natural gas fuel supplied to a plurality of engines of the engine system using a first analyzer disposed upstream of a fuel inlet of each of the plurality of engines, wherein the first characteristic includes identification of a plurality of components of the natural gas fuel;
determining a second characteristic of the natural gas fuel using a second analyzer disposed onboard of one of the plurality of engines downstream of the fuel inlet to the one of the plurality of engines, wherein the second characteristic includes a concentration of one or more of the identified components of the natural gas fuel determined by the first analyzer;
determining a fuel flow value for the natural gas engine in response to an air-fuel ratio target and a mass air flow to the natural gas engine;
estimating an air-fuel ratio based on the identification of the plurality of components of the natural gas fuel from the first analyzer and the concentration of the one or more of the identified components of the natural gas fuel from the second analyzer;
determining a fuel flow correction value based on the fuel flow value and the estimate of the air-fuel ratio; and
providing a total fuel flow command based on the fuel flow value and the fuel flow correction value.