초록 ▼

A barrier vapor control system includes a seal inside an automobile filler pipe for engaging the fuel delivery conduit of a pump nozzle to prevent the escape of hydrocarbon vapors out of the filler pipe into the atmosphere while the fuel tank is being refilled. A vapor recovery conduit downstream of

A barrier vapor control system includes a seal inside an automobile filler pipe for engaging the fuel delivery conduit of a pump nozzle to prevent the escape of hydrocarbon vapors out of the filler pipe into the atmosphere while the fuel tank is being refilled. A vapor recovery conduit downstream of the seal carries the vapors displaced by filling the fuel tank to a cannister that contains a scrubbing agent. A vacuum accumulator and a vacuum pump draw fresh air and the vapors from the fuel tank through the cannister to remove hydrocarbon vapors from the effluent vapors of the fuel tank.

대표청구항 ▼

A method for controlling vapor emissions from a motor vehicle fuel tank having a filler pipe extending therefrom while the tank receives a volatile liquid from a fuel delivery conduit, comprising the steps of: placing a first seal adjacent one end of the filler pipe; placing a second seal in the fil

A method for controlling vapor emissions from a motor vehicle fuel tank having a filler pipe extending therefrom while the tank receives a volatile liquid from a fuel delivery conduit, comprising the steps of: placing a first seal adjacent one end of the filler pipe; placing a second seal in the filler pipe spaced apart from the first seal; collecting vapors displaced from the tank as the tank filles with the liquid, wherein said collecting step further comprises: connecting an activated charcoal cannister to the vapor recovery conduit; maintaining a predetermined vacuum in the vapor recovery conduit to draw vapors placed from the fuel tank into the cannister; placing a switch in communication with the filler pipe and a vacuum pump, for actuation by insertion and removal of the fuel delivery conduit therefrom; activating a vacuum pump with the switch to provide the vacuum to the vapor recovery conduit; placing a first seal adjacent one end of the filler pipe; and placing a second seal in the filler pipe spaced apart from the first seal.