초록 ▼

An apparatus is provided for detecting the presence of a vehicle equipped with an onboard refueling vapor recovery system. The apparatus has a body that is equipped with an inlet fluid port and an outlet fluid port that is in fluid communication with the inlet fluid port. The body also has an inlet

An apparatus is provided for detecting the presence of a vehicle equipped with an onboard refueling vapor recovery system. The apparatus has a body that is equipped with an inlet fluid port and an outlet fluid port that is in fluid communication with the inlet fluid port. The body also has an inlet vapor port that is in fluid communication with the outlet fluid port. The apparatus further includes a vacuum chamber that is located within the body, and that is in fluid communication with the vapor port and the outlet port. The apparatus has a vaccum activated detecting switch coupled to the body that is in fluid communication with the vacuum chamber. A vacuum-generating nozzle is coupled within the body between the inlet port and the vacuum chamber. Fuel may be provided to the inlet port and routed through the nozzle to create a vacuum within the chamber. The vapor port may be coupled to a vapor return line, and the switch can be adjusted to detect the pressure difference occurring when air is returned through the vapor port rather than fuel vapor. This sensed difference can then be used to adjust the operation of a Phase II vapor recovery system.

대표청구항 ▼

[ Having thus claimed the invention, what is claimed is:] [1.] An apparatus for detecting the presence of a vehicle equipped with an onboard refueling vapor recovery system, comprising:a body having an inlet fluid port and an outlet fluid port in fluid communication with said inlet fluid port, said

[ Having thus claimed the invention, what is claimed is:] [1.] An apparatus for detecting the presence of a vehicle equipped with an onboard refueling vapor recovery system, comprising:a body having an inlet fluid port and an outlet fluid port in fluid communication with said inlet fluid port, said body further having an inlet vapor port in fluid communication with said outlet fluid port;a vacuum chamber located within said body, said vacuum chamber being in fluid communication with said vapor port and said outlet port;a vacuum-activated switch coupled to said body and operably connected to be in communication with said vacuum chamber; anda vacuum-generating nozzle coupled within said body between said inlet port and said vacuum chamber, wherein fuel may be provided to said inlet port and routed through said nozzle to create a vacuum within said chamber and wherein said vapor port may be coupled to a vapor return line, said switch being adjusted to detect the vacuum difference occurring when air is returned through said vapor port rather than fuel vapor.