Engine control device and methods thereof

1. An engine control device for a gas turbine engine, comprising:

a housing;

an electronic engine control (EEC) system disposed in the housing of the engine control device, the EEC system configured to control a flow rate by commanding a fuel valve to meter a fuel flow;

a fluid conduit disposed through the housing and defining an inlet port in the housing and an outlet port in the housing, the fluid conduit configured to receive fuel during operation of the engine control device, the fuel supplied through the fluid conduit to cool the EEC system; and

a densimeter operably coupled to the fluid conduit, the densimeter embedded within the housing of the engine control device between the inlet port and the outlet port, the densimeter configured to determine a density of the fuel.

2. The engine control device of claim 1 , wherein the engine control device is configured to control the fuel flow to a fuel nozzle based on measurements from the densimeter.

3. The engine control device of claim 1 , further comprising:

a temperature sensor operably coupled to the fluid conduit to measure a temperature of the fuel;

wherein the EEC system comprises:

a processor; and

a non-transitory computer readable storage medium in electronic communication with the processor, the non-transitory computer readable storage medium having instructions stored thereon that, in response to execution by the processor cause the processor to perform operations comprising:

detecting, by the processor, a first temperature of the fuel flowing through the fluid conduit from the temperature sensor;

determining, by the processor, a first density of the fuel at the first temperature from the densimeter;

calculating, by the processor, a second density at a second temperature of the fuel; and

commanding, by the processor, the fuel valve to meter the fuel flow to a fuel nozzle of the gas-turbine engine to a desired fuel flow rate based on the second density.

4. The engine control device of claim 3 , wherein the operations further comprise detecting, by the processor, the second temperature of the fuel at the fuel valve.

5. The engine control device of claim 1 , wherein the inlet port is disposed at a first end of the housing and the outlet port is disposed at a second end of the housing.

6. A fuel flow control system for a gas turbine engine, the fuel flow control system comprising:

a fuel supply;

a fluid conduit in fluid communication with the fuel supply, the fuel supply configured to supply a fuel through the fluid conduit to cool an electronic engine control (EEC) system for the gas turbine engine;

an engine control device in fluid communication with the fuel supply, the engine control device defining a housing, the EEC system disposed within the housing of the engine control device, the fluid conduit defining an inlet port and an outlet port in the housing;

a densimeter operably coupled to the fluid conduit, the densimeter embedded within the housing of the engine control device, the densimeter configured to determine a first density of the fuel;

a first temperature sensor operably coupled to the fluid conduit, the first temperature sensor configured to measure a first temperature of the fuel;

a fuel nozzle in fluid communication with the fuel supply; and

a second temperature sensor disposed between the fuel nozzle and the fuel supply, the second temperature sensor configured to measure a second temperature of the fuel, wherein the EEC system is configured to control a flow rate to the fuel nozzle via a fuel valve based on calculating a second density of the fuel proximal the fuel nozzle from the first density, the first temperature and the second temperature.

7. The fuel flow control system of claim 6 , wherein the fluid conduit is disposed through the housing of the engine control device.

8. The fuel flow control system of claim 6 , wherein the fuel from the fuel supply is configured to cool the engine control device during operation of the gas turbine engine.

9. A method of controlling a fuel flow in a gas turbine engine, the method comprising:

measuring a first fuel temperature of a fuel at a first location, the first location is within an engine control device having an electronic engine control (EEC) system disposed in a housing of the engine control device, the EEC system configured to control a flow rate in response to commanding a fuel valve assembly;

measuring, via a densimeter embedded within the housing, a first density of the fuel proximate the first location within the housing between an inlet port and an outlet port of a fluid conduit supplying the fuel through the housing of the engine control device;

measuring a second fuel temperature of the fuel at a second location;

calculating a second density of the fuel at the second location based on the second fuel temperature, the first fuel temperature, and the first density of the fuel; and

metering the fuel flow via the fuel valve assembly to a desired fuel flow rate at the second location based on the second density of the fuel.

10. The method of claim 9 , wherein the fuel valve assembly is disposed proximate a fuel nozzle of the gas turbine engine.

11. The method of claim 9 , further comprising cooling the EEC system in response to the fuel flowing through the engine control device.