United Technologies Corporation

Eric Nelson Hettler

Amy Rose Grace

William Donat

Angelo Martucci

Kevin Patrick McCormick

Thomas A Bush

Haralambos Cordatos

Kevin D Gibbons

Christopher Mazella

A fuel actuation system may comprise a servo valve (SV) including a torque motor and at least one screen, a metering valve (MV) fluidly connected to the SV, and an electronic engine control (EEC) operatively connected to the SV. The EEC may be configured and disposed to determine a travel time of the MV, a travel distance of the MV, a pressure of a fuel, and/or a temperature of the fuel, generate at least one of a travel time history, a travel distance history, a fuel temperature history, and a fuel pressure history, and determine a level of degradation of the fuel actuation system based on the at least one of the travel time history, the travel distance history, the fuel temperature history, or the fuel pressure history.

Fuel metering valve actuator initiated built in test

A system and method for the calculation of a fuel lacquer index using environmental monitoring is disclosed. The system and method may comprise: capturing a fuel temperature data; determining a fuel quality rating; calculating a volumetric fuel flow; calculating a fuel filter differential pressure; and calculating a fuel lacquer index. The fuel lacquer index may be calculated as a percentage value based upon the fuel temperature data, the fuel quality rating, the volumetric fuel flow, and the fuel filter differential pressure.

System and method for the calculation of a fuel lacquer index

Systems and methods for monitoring fuel actuation system health are described herein. A method for monitoring fuel actuation system health may comprise: moving a metering valve from a first position to a second position; detecting a first travel distance of the metering valve; storing the first travel distance of the metering valve to memory to generate a first travel distance history; and determining a level of degradation of the fuel actuation system based on at least the first travel distance history.

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Rochester, CT, United States of America

Eric Nelson Hettler