Patent ID: 7810470
Filing Date: 2010-10-12
Classification: F02D,F02M

Abstract:
1. A fuel system for supplying fuel from a tank to a fuel injected engine having an ignition system and air intake manifold, the system comprising: a fuel tank, a fuel rail, one or more fuel injectors communicating between the fuel rail and air intake manifold, a fuel pump for delivery of fuel from the fuel tank to the fuel rail, a return line from the fuel rail to the tank, a fuel pressure regulator disposed in the return line between the fuel rail and the tank, and an electronic control module; the fuel pressure regulator having an air chamber, a fuel intake chamber, a fill chamber, a diaphragm assembly disposed between the fill chamber and the air chamber, a return reservoir, a return chamber, an adjustable valve disposed between the return reservoir and the return chamber and comparative pressure sensing means that outputs one or more electric signals based upon the fuel pressures in the return reservoir and the return chamber; the intake chamber being in fluid communication with the fuel rail; the fill chamber being in fluid communication with the intake chamber; the return chamber being in fluid communication with the return line; the fill chamber having at least one surface defined by the diaphragm assembly, the movement of the diaphragm assembly being regulated by the pressure of fuel in the fuel rail and air pressure in the engine air intake manifold; the diaphragm assembly permitting the flow of fuel from the fill chamber to the return reservoir based upon the difference in pressure of fuel in the fuel rail and pressure of air in the engine air intake manifold reaching a predetermined point; the return chamber being in fluid communication with the return reservoir, the flow of fuel from the return reservoir to the return chamber being subject to restriction by the adjustable valve; and the electronic control module being electrically connected to the comparative pressure sensing means and the fuel pump and adapted to receive the one or more electric signals from the comparative sensing means and output a speed control signal to the fuel pump based upon those one or more signals.