초록 ▼

A recovery system is provided for recovering fuel vapor normally discharged from a fuel system during refueling. The recovery system includes a fuel tank filler neck, a vent system coupled to the filler neck, and a double-sealed cap for actuating the vent system as it is removed from the neck. The n

A recovery system is provided for recovering fuel vapor normally discharged from a fuel system during refueling. The recovery system includes a fuel tank filler neck, a vent system coupled to the filler neck, and a double-sealed cap for actuating the vent system as it is removed from the neck. The neck has a mouth and axially spaced-apart upper and lower side outlets. The double-sealed cap includes a closure rotatably engaging the neck, a first seal for establishing a movable primary seal between the closure and axially outer side wall of the neck and a second seal for establishing a movable secondary seal between the closure and at least an axially inner side wall of the neck. The primary and secondary seals move in an axially outward direction relative to the neck in response to removal of the cap, causing the primary and secondary seals to be broken in sequence as the cap is rotated. The vent system vents pressurized fuel vapor from the neck through the lower side outlet in response to rotation of the cap in its cap-removal direction to a position wherein only the primary seal is broken. Thus, pressurized fuel vapor is discharged to a canister through the lower side outlet of the neck without being exhausted to the atmosphere through the filler neck mouth.

대표청구항 ▼

A recovery system for recovering fuel vapor normally discharged from a fuel system during refueling, the recovery system comprising a fuel tank filler neck having a mouth and a vent outlet spaced in relation to the mouth, a fuel cap including closure means rotatably engaging the filler neck for clos

A recovery system for recovering fuel vapor normally discharged from a fuel system during refueling, the recovery system comprising a fuel tank filler neck having a mouth and a vent outlet spaced in relation to the mouth, a fuel cap including closure means rotatably engaging the filler neck for closing the mouth, the closure means including first seal means for normally establishing a seal between the closure means and the filler neck, vent means for selectively venting pressurized fuel vapor from the filler neck through the vent outlet, and actuation means for actuating the vent means upon rotation of the cap relative to the filler neck to a position breaking said seal and prior to removal of the cap from the filler neck to vent pressurized fuel vapor in the filler neck through the vent outlet without venting pressurized fuel vapor through the filler neck mouth.