Variable displacement pump with active bypass feedback control
OwnerMatej Rutarinventor
Life of this patent
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Abstract
A system comprises a variable displacement pump, a metering valve, a bypass line, a pressure regulating valve, a position sensor, and a control system. At least one fuel nozzle can be in fluid communication with the output line downstream of the metering valve, wherein the variable displacement pump is configured to supply fuel to the at least one fuel nozzle. The metering valve can be disposed in the output line for controlling outlet flow from the variable displacement pump. The system can also include an actuator line parallel to the variable displacement pump and connected to the output line to provide actuation pressure from pump output of the variable displacement pump.
Claims15
A system comprising:
- a variable displacement pump;
- a metering valve in an output line for controlling outlet flow from the variable displacement pump to at least one fuel nozzle;
- a bypass line connected for fluid communication from the output line to an input line in fluid communication with an inlet of the variable displacement pump for bypassing a portion of pump flow from the outlet of the variable displacement pump, wherein the bypass line connects to the output line upstream of the metering valve via a pressure tap and connects to the output line downstream of the metering valve;
- a pressure regulating valve in the bypass line configured to control pressure drop across the metering valve by bypassing a portion of the pump flow back through the variable displacement pump;
- a position sensor operatively connected to sense position of a valve component of the pressure regulating valve;
- and
- a control system operatively connected to receive input from the position sensor and operatively connected to control displacement of the variable displacement pump based on the position of the valve component.
A method of controlling a variable displacement pump comprising:
- measuring position of a valve component in a pressuring regulating valve in a bypass line bypassing an outlet of the variable displacement pump;
- and
- adjusting displacement of the variable displacement pump based on position of the valve component, wherein the bypass line connects to the output line upstream of a metering valve via a pressure tap and connects to the output line downstream of the metering valve.
Dependencies are inferred from the claim text.