초록 ▼

A fuel delivery system for providing a desired fuel flow to an engine includes a pump means for providing fuel to a metering valve which in turn regulates the flow of fuel to provide a desired fuel flow to the engine by varying the area of the metering window. The pressure differential across the me

A fuel delivery system for providing a desired fuel flow to an engine includes a pump means for providing fuel to a metering valve which in turn regulates the flow of fuel to provide a desired fuel flow to the engine by varying the area of the metering window. The pressure differential across the metering valve is maintained at a desired set point in order to precisely control desired fuel flow by varying the area of the metering window. The pressure differential is sensed by a pressure regulating motive flow control valve (PRMFV). The PRMFV is positioned in response to the pressure differential to bypass fuel away from the metering valve to control the differential pressure to the desired set point. The PRMFV first bypasses fuel to an ejector pump and as the amount of excess flow to the metering valve increases the PRMFV bypasses fuel back to the inlet of the pump means.

대표청구항 ▼

[ I claim:] [1.] A fuel delivery system for providing a desired fuel flow to an engine, comprising:a first pump means for providing fuel;a metering means for providing the desired fuel flow to the engine, said metering means in fluid communication with said first pump means for receiving said fuel;

[ I claim:] [1.] A fuel delivery system for providing a desired fuel flow to an engine, comprising:a first pump means for providing fuel;a metering means for providing the desired fuel flow to the engine, said metering means in fluid communication with said first pump means for receiving said fuel; anda pressure regulation means for setting a pressure differential across said metering means as required by the desired fuel flow, said pressure regulation means including a means for sensing said pressure differential, wherein said pressure regulation means includes a first means for bypassing said fuel away from said metering means for adjusting said pressure differential as required to achieve said desired fuel flow and a second means for bypassing said fuel away from said metering means for further adjusting said pressure differential as further required to achieve the desired fuel flow.