Fuel vapor recovery system
AssigneeFord Motor Company
InventorsGerald Reed Fargo, Philip Jeffrey Johnson, Mark Frederick Jacobson
Life of this patent
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Abstract
A fuel vapor recovery system for an automotive vehicle includes a fuel tank, a first vapor recovery canister, a second vapor recovery canister, and a bypass flow metering element. The first canister has an inlet communicating directly with the fuel tank and an outlet. The second canister has an inlet communicating directly with the outlet of the first canister. The bypass flow metering element is disposed between the inlet and outlet of the first canister and directs a predetermined portion of the vapor from the tank directly to the inlet of the second canister, thereby reducing the vapor flow restriction through the system.
Claims6
A fuel vapor recovery system for an automotive vehicle comprising:
- a fuel tank;
- a first vapor recovery canister having an inlet communicating directly with said fuel tank and an outlet;
- a second vapor recovery canister having an inlet communicating directly with said outlet of said first vapor recovery canister;
- and,
- a bypass flow metering element connected directly between said inlet and outlet of said first vapor recovery canister for directing a predetermined portion of the vapor from said tank directly to said inlet of said second vapor recovery canister, thereby reducing the restriction through said first vapor recovery canister, with purge air, upon purging said canisters, flowing though said second canister to initially purge said second canister and entering said first canister exclusively from said second canister to then purge said first canister.
Dependencies are inferred from the claim text.