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

Claim 12:
13. An engine system, comprising:
a plurality of natural gas engines;
a first analyzer disposed upstream of a fuel inlet to each of the plurality of natural gas engines, the first analyzer being configured to identify a plurality of components of the natural gas fuel;
a mid-infrared analyzer disposed onboard one of the plurality of natural gas engines; and
a controller coupled to the one of the plurality of natural gas engines, the controller being configured to determine a concentration of at least one of the plurality of identified components of the natural gas fuel supplied to the one of the plurality of natural gas engines based on detection of the concentration of one or more of the plurality of identified components of the natural gas fuel by the mid-infrared analyzer, and wherein the controller is configured to:
determine a fuel flow value for the one of the plurality of natural gas engines in response to an air-fuel ratio target and a mass air flow to the one of the plurality of natural gas engines;
estimate 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 at least one of the plurality of components of the natural gas fuel from the mid-infrared analyzer;
determine a fuel flow correction value based on the fuel flow value and the estimate of the air-fuel ratio; and
provide a control command to the one of the plurality of natural gas engines as a total fuel flow command based on the fuel flow value and the fuel flow correction value.