초록 ▼

A testing method and apparatus for use at service stations to establish whether gasoline refueling systems meet government regulations for gasoline vapor emission. The apparatus includes a boot used to surround a gasoline dispensing nozzle while delivering gasoline to an automobile gas tank. The boo

A testing method and apparatus for use at service stations to establish whether gasoline refueling systems meet government regulations for gasoline vapor emission. The apparatus includes a boot used to surround a gasoline dispensing nozzle while delivering gasoline to an automobile gas tank. The boot is of flexible material and has a hollow wall defining a vapor collection chamber, the inner part of the hollow wall having apertures distributed over its surface to allow gasoline vapor to be drawn into the chamber by suction. The outer part of the hollow wall has a stub connectable to a tube leading to vapor emission analyzing equipment. In the method, such a boot is used to recover the emitted vapors directly from the vehicle-nozzle interface region and the recovered vapors are drawn by a pump through a flow meter and delivered to an analyzer. The outputs of the flow meter and analyzer may be delivered to a computing device to determine the mass emission rate of hydrocarbons and the accumulated total hydrocarbon mass emitted.

대표청구항 ▼

A boot for use in a testing apparatus to measure vapor emission from the interface region between a dispensing nozzle and the neck of a liquid storage container, said boot being adapted to be placed over the container neck and to surround and receive the nozzle without being connected in sealed enga

A boot for use in a testing apparatus to measure vapor emission from the interface region between a dispensing nozzle and the neck of a liquid storage container, said boot being adapted to be placed over the container neck and to surround and receive the nozzle without being connected in sealed engagement therewith, said boot comprising a sleeve-like member, open at both ends, having a hollow peripheral wall defining a vapor collection chamber, said hollow wall comprising an inner wall element and an outer wall element, the inner wall element being provided with holes substantially uniformly distributed over the surface area thereof, and conduit receiving means for permitting a conduit to connect with the boot to convey collected vapor from said collection chamber to an analyzing means.