Patent ID: 8176897

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 pressure sensor that is operable to detect a fuel inlet pressure at the fuel inlet and use the fuel inlet pressure to generate a first pressure signal; a microprocessor operable to receive the first pressure signal from the pressure sensor and a second pressure signal from the engine control module and generate a third pressure signal that is related to a difference between the first pressure signal and the second pressure signal; an actuator coupled to the microprocessor and operable to receive the third pressure signal, wherein the actuator includes an actuator member coupled to at least one flexure element that provides the actuator member with a predetermined range of motion; and a pressure actuated regulator device coupled to the actuator member, wherein, in response to the actuator receiving the third pressure signal, the actuator member moves along the predetermined range of motion to cause the pressure-actuated regulator device to adjust the fuel pressure in the fuel line.