| 20090107471 | FUEL SUPPLY APPARATUS - The present invention includes a fuel supply apparatus having a pressure regulator for regulating a pressure of fuel supplied from a fuel pump to a target, such as an internal combustion engine of an automobile. The pressure regulator includes a first pressure chamber, a second pressure chamber and a third pressure chamber each configured to be able to receive a supply of the fuel from the fuel pump. A first diaphragm separates the first pressure chamber and the second pressure chamber from each other. A second diaphragm separates the second pressure chamber and the third pressure chamber from each other. The first pressure chamber has a discharge port that can discharge the fuel supplied into the first pressure chamber. A valve assembly is coupled to the first and second diaphragms, so that the valve assembly can open and close the discharge port of the first pressure chamber in response to the balance of forces applied to the first and second diaphragms by pressures of the fuel within the first, second and third pressure chambers. A controller can control the pressure of the fuel within each of the second and third pressure chambers. | 04-30-2009 |
