Patent ID: 8006668

Claim:
A fuel system, comprising: a fuel mixer including a fuel inlet; an engine control module; and a fuel pressure regulator coupled to the engine control module and the fuel mixer, the fuel pressure regulator comprising: a microprocessor; a pressure sensor that is operable to detect a fuel inlet pressure at the fuel inlet and use the fuel inlet pressure to determine an actual pressure signal, wherein the microprocessor is operable to receive the actual pressure signal and generate an actuation signal related to the difference between the actual pressure signal and a desired pressure signal received from the engine control module; an actuator coupled to the microprocessor and operable to move in response to receiving the actuation signal; and a diaphragm coupled to the actuator and an outlet pressure control module that controls the fuel inlet pressure; wherein the diaphragm moves to control the outlet pressure control module, in order to control the fuel inlet pressure, in response to each of (1) a differential pressure acting on the diaphragm and (2) movement of the actuator.