TANK COVER UNIT AND FUEL SUPPLY SYSTEM

摘要

PROBLEM TO BE SOLVED: To provide a tank cover unit for avoiding trouble in a driving circuit.SOLUTION: A circuit casing part 12 integrally formed at an upper part of a cover main body part 11 so as to make a partitioning against a protective space 120 for a driving circuit 13 comprises a bottom part 121 forming an aeration space 124 between itself and the cover main body part 11, a side part 122 enclosing the protective space 120 above the bottom part 121 and an aeration hole 126 passing between the protective space 120 and an outer space 3 at the side part 122. A terminal 15 is set in such a way that its intermediate part 152 is buried at the bottom part 121 to cause itself to extend between a fuel pump and the driving circuit 13 through the bottom part 121 and an interface 121d between the bottom part 121 and the intermediate part 152 is exposed at the protective space 120 at an upper location than the aeration hole 126. A liquid protective aeration film 19 is installed at an outer surface 122b of the side part 122 to cover the aeration hole 126 and allow fuel vapor to discharge from the aeration hole 126 into the outer space 3 and in turn restrict immersion of liquid from the outer space 3 into the aeration hole 126.SELECTED DRAWING: Figure 6