초록 ▼

A fuel system for delivering fuel from a fuel source to combustor in a gas turbine engine has a pump receiving fuel flow from the fuel source and producing a pressurized fuel flow that flows to a flow meter that measures the fuel flow and generates a signal thereof. A bypass valve bypasses, to the i

A fuel system for delivering fuel from a fuel source to combustor in a gas turbine engine has a pump receiving fuel flow from the fuel source and producing a pressurized fuel flow that flows to a flow meter that measures the fuel flow and generates a signal thereof. A bypass valve bypasses, to the input side of the pump, a portion of the pressurized fuel flow before it reaches the flow meter. An electronic control unit is included that receives the signal and in response thereto adjusts the bypass valve until the measured fuel flow equals a predetermined desired fuel flow stored in the electronic control unit. The fuel system is also self-calibrating.

대표청구항 ▼

1. A fuel system for delivering fuel from a fuel source to a combustor in a gas turbine engine comprising:a pump receiving a fuel flow from said fuel source and producing a pressurized fuel flow; a flow meter downstream of said pump and receiving said pressurized fuel flow directly from said pump, s

1. A fuel system for delivering fuel from a fuel source to a combustor in a gas turbine engine comprising:a pump receiving a fuel flow from said fuel source and producing a pressurized fuel flow; a flow meter downstream of said pump and receiving said pressurized fuel flow directly from said pump, said flow meter measuring said pressurized fuel flow and generating a signal Wfm thereof; a bypass valve for bypassing a portion of said pressurized fuel flow before it reaches said flow meter to an input side of said pump; and an electronic control unit connected to receive as inputs said Wfm signal and at least one other signal indicative of engine fuel demand and having as stored data in said electronic control unit a predetermined desired fuel flow and being configured to calculate a corrected desired fuel flow from said inputs and said stored data and to adjust an area of said bypass valve to vary the portion of pressurized fuel bypassed to the input side of the pump until said measured pressurized fuel flow equals the corrected predetermined desired fuel flow.