Patent attributes
Embodiments of a fuel system are disclosed. The fuel system includes a bypass valve (BPV), a fuel metering valve (FMV), a flow sense valve (FSV), and an actuator regulating valve (ARV). The BPV includes a BPV valve member that regulates fuel flow from a BPV inlet to a BPV outlet. The position of the BPV valve member is controlled by pressures at an inlet and an outlet of the FMV. The FSV includes an FSV valve member that regulates fuel flow from an FSV inlet to an FSV outlet. The ARV includes an ARV inlet that is in fluid communication with the FSV outlet, and fuel flow through an ARV outlet regulates downstream actuators. The position of the FSV valve member to produce fuel flow through the FSV outlet to the ARV inlet is controlled at least in part by a pressure at the BPV outlet.
