| 摘要 |
The present subject matter relates to a hermetic fuel unit assembly for ethanol fuel vehicles that includes a top plate suspended from the top inside of a fuel tank to hold a fuel unit assembly, a central lower annular arm extending down from the center of the top plate, a bracket snap-fitted to the extending arm of the top plate, and a U-shaped housing operably connected to the bracket by fasteners. The U-shaped housing is provided with a base wall and at least four side walls extending generally perpendicular to the base wall to create an enclosed compartment. The enclosed compartment according to the present subject matter includes a thin film resistor disposed in the enclosed compartment of the U-shaped housing, a wiper placed above the thin film resistor in the enclosed compartment for movement along an arc shaped conductive trace carved on the thin film resistor. The present subject matter further discloses that the U-shaped housing is hermetically shielded by a first cover by ultrasonic welding. The first cover is provided with an aperture extending there through the first cover wherein the aperture is covered by a second carrier projected to receive a float arm with a float floating in the ethanol fuel in the fuel tank. The structure is uniquely provided with a second cover covering the second carrier providing the path for guiding the movement of float arm in the ethanol fuel in the he1 tank. The hermetic fuel tank assembly for ethanol fuel vehicles according to the present subject matter advantageously facilitates a completely shielded fuel unit assembly that can be implemented in ethanol fuel or a fuel comprising gasoline and ethanol wherein the percentage of ethanol ranges from 25% to 100%. REFER : FIG. 3 |
