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US 2026/0110265 A1Published application
Fuel metering valve performance shift check function
AssigneePratt & Whitney Canada Corp.
InventorsCedric Saintignan, James Jarvo, Hytham Mokhtar, Giancarlo Zingaro, Robert Pontarelli
Life of this patent
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Abstract
A method includes controlling a fuel pump to pump fuel through an inlet of a fuel metering valve (FMV), commanding the FMV to open a metering window of the FMV a controllable increment beyond an edge of the metering window, and checking for a presence of fuel downstream from a discharge of the FMV.
Claims20
A method comprising:
- controlling a fuel pump to pump fuel through an inlet of an electronically controllable fuel metering valve (FMV);
- commanding, via an input signal from an Engine Electronic Control (EEC), the FMV to open at least one metering window of the FMV a controllable increment beyond an edge of the at least one metering window;
- and
- checking for a presence of fuel downstream from a discharge of the FMV.
1 more element
A system comprising:
- An electronically controllable fuel metering valve (FMV) including an inlet, a discharge, a drain, and at least one metering window;
- a fuel pump configured to pump fuel through the inlet of the FMV;
- and
- a controller configured to:
- receive a command to initiate a fuel presence check process;
- and
- in response to receiving the command:
- control the fuel pump to pump fuel through the inlet of the FMV;
- and
- command, via an input signal from the controller, the FMV to open the at least one metering window of the FMV a controllable increment beyond an edge of the at least one metering window.
7 more elements
A non-transitory machine readable medium containing instructions that when executed cause at least one processor to:
- receive a command to initiate a fuel presence check process;
- and
- in response to receiving the command:
- control a fuel pump to pump fuel through an inlet of an electronically controllable fuel metering valve (FMV);
- and
- command, via an input signal from the processor, the FMV to open at least one metering window of the FMV a controllable increment beyond an edge of the at least one metering window.
3 more elements
Dependencies are inferred from the claim text.