Internal-combustion engines – Charge forming device – Having fuel vapor recovery and storage system
Patent
1991-11-19
1993-03-16
Miller, Carl S.
Internal-combustion engines
Charge forming device
Having fuel vapor recovery and storage system
123516, F02M 3302
Patent
active
051935112
ABSTRACT:
There is provided a connecting pipe 2 for communicating a fuel tank 1 and a canister 3 filled with a fuel absorbent, and a nonreturn valve 4 which is interposed in an intermediate portion of the connecting pipe 2 and is opened to allow vapor fuel to flow from the fuel tank 1 to the canister 3 only when a pressure of the fuel tank side exceeds a pressure of canister side, and there is also provided an electromagnetic switching valve 8 disposed in parallel with the nonreturn valve 4. To this electromagnetic switching valve an actuation signal is fed by a switch which operates when a fuel pump P is actuated or when a fuel filler cap is operated to open, and in response to this actuation signal the electromagnetic valve is opened to eliminate a negative pressure in the fuel tank.
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patent: 4702216 (1987-10-01), Hiruta
patent: 4815436 (1989-03-01), Sasaki
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patent: 4951643 (1990-08-01), Sato
patent: 4962744 (1990-10-01), Uranishi
patent: 5027780 (1991-07-01), Uranishi
patent: 5056493 (1991-10-01), Holzer
patent: 5056494 (1991-10-01), Kayanuma
Honda Giken Kogyo Kabushiki Kaisha
Miller Carl S.
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