초록 ▼

An apparatus is provided for controlling venting of vapor to and from a fuel tank. The apparatus includes a housing and first and second valves positioned in the housing. The first valve controls the primary flow of vapors from the fuel tank and includes an aperture permitting an auxiliary flow of v

An apparatus is provided for controlling venting of vapor to and from a fuel tank. The apparatus includes a housing and first and second valves positioned in the housing. The first valve controls the primary flow of vapors from the fuel tank and includes an aperture permitting an auxiliary flow of vapor to and from the fuel tank. The second valve controls the auxiliary flow of vapor to the fuel tank and includes first and second apertures permitting vapor to flow to the fuel tank. The second valve moves between a first position permitting vapor to flow through the first aperture and a second position permitting vapor to flow through the first and second apertures at a greater flow rate.

대표청구항 ▼

[ We claim:] [1.] An apparatus for controlling venting of fuel vapors from a vehicle fuel tank, the apparatus comprisinga housing formed to include an inlet adapted to receive fuel vapor from a vehicle fuel tank, an outlet, and an interior region configured to communicate with the inlet and outlet,a

[ We claim:] [1.] An apparatus for controlling venting of fuel vapors from a vehicle fuel tank, the apparatus comprisinga housing formed to include an inlet adapted to receive fuel vapor from a vehicle fuel tank, an outlet, and an interior region configured to communicate with the inlet and outlet,a first valve positioned to partition the interior region to form a first chamber establishing a primary flow path between the inlet and the outlet and a second chamber, the first valve being movable between a closed position blocking the flow of vapor through the primary flow path from the inlet to the outlet and an opened position permitting the flow of vapor through the primary flow path from the inlet to the outlet, the first valve being formed to include a first flow passage arranged to conduct vapor between the first and second chambers,a conduit arranged to conduct vapor between the first and second chambers, anda second valve positioned to lie in the interior region to move from a seated position to an unseated position, the second valve being formed to include a second flow passage and a third flow passage, the conduit, the second chamber, the second flow passage, and the first flow passage cooperating to establish a first auxiliary flow path while the second valve is in the seated position, the second flow passage establishing a first flow area through the first auxiliary flow path while the second valve is in the seated position, the conduit, the second chamber, the second flow passage, the third flow passage, and the first flow passage cooperating to establish a second auxiliary flow path while the second valve is in the opened position, the second and third flow passages cooperating to establish a second flow area through the second auxiliary flow path while the second valve is in the opened position, the second flow area being greater than the first flow area.