Fuel vapor recovery apparatus
AssigneeNok Corporation
InventorsToshiteru Masaki, Hideyuki Nagashima
Life of this patent
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Abstract
The present invention is provides a fuel vapor recovery apparatus for automobiles that includes a canister for cooling and condensing the fuel vapor generated in the fuel tank and a membrane separation means for separating the fuel vapor flowed from the canister. The present invention also provides for a membrane separation means for separating the fuel vapor from a canister storing fuel vapor into a fuel rich mixture and a means for liquefying and condensing this separated fuel rich mixture.
Claims14
A fuel vapor recovery apparatus comprising:
- a canister including an inflow port for introducing fuel vapor from a fuel tank, an absorption means for absorbing the fuel vapor in said canister, a gas introduction port for introducing gas to scavenge the fuel vapor absorbed by said absorption means, and an exhaust port for exhausting the scavenged fuel vapor;
- a membrane separation means for separating by a separation membrane the fuel vapor flowing from the exhaust port of said canister into a fuel rich mixture and an air rich mixture and exhausting each of the ingredients from a fuel rich mixture exhaust port and a gas rich mixture exhaust port;
- a scavenging circulatory passage formed by connecting the gas rich mixture exhaust port of said membrane separation means and the gas introduction port of said canister;
- a condensation means for liquefying the fuel rich mixture introduced from the fuel rich mixture exhaust port of said membrane separation means and separated by the membrane;
- and a return passage for returning the liquefied fuel liquefied by said condensation means to the fuel tank.
A fuel vapor recovery apparatus comprising a canister including an absorption means for temporarily storing fuel vapor from a fuel tank and a supply passage for supplying the fuel vapor that is scavenged from an inside of said canister to an intake portion of an engine;
- a membrane separation means being disposed at a midpoint of said supply passage for separating by a separation membrane the supplied fuel vapor into a fuel rich mixture which is exhausted from an fuel rich mixture exhaust port and an air rich mixture which is exhausted downstream of said supply passage;
- a condensation means for liquefying the fuel rich mixture introduced from the fuel rich mixture exhaust port of said membrane separation means and separated by the membrane;
- and
- a return passage for returning the fuel liquefied by said condensation means to the fuel tank.
A fuel vapor recovery apparatus comprising, a canister being provided with an inflow port for introducing fuel vapor from a fuel tank, an absorption means for absorbing the fuel vapor in said canister, a gas introduction port for scavenging the fuel vapor absorbed by the absorption means, an exhaust port for exhausting the scavenged fuel vapor, and a supply passage for supplying the fuel vapor scavenged from the exhaust port of said canister to an intake portion of an engine;
- a membrane separation means being connected at a midpoint of said supply passage for separating by a separation membrane the fuel vapor supplied into a fuel rich mixture which is exhausted from a fuel rich mixture exhaust port and an air rich mixture which is exhausted from a gas rich mixture exhaust port;
- a scavenging circulatory passage formed by connecting the gas rich mixture exhaust port of said membrane separation means and the gas introduction port of said canister;
- a condensation means for liquefying the fuel rich mixture introduced from the fuel rich mixture exhaust port of said membrane separation means and separated by the membrane;
- and a return passage for returning the fuel liquefied by said condensation means to the fuel tank.
A fuel vapor recovery apparatus comprising;
- a condensation apparatus comprising an inflow port for introducing fuel vapor from a fuel tank, a condensation means for liquifying fuel vapor in said condensation apparatus, a return pass for returning fuel liquefied by said condensation means to the fuel tank, and an exhaust port for exhausting the fuel vapor not liquefied by said condensation means;
- a canister including an inflow port for introducing the fuel vapor not liquefied by said condensation apparatus, an absorption means for absorbing the fuel vapor in said canister, a gas introduction port for introducing gas which scavenges the fuel vapor absorbed by the absorption means, and an exhaust port for exhausting the scavenged fuel vapor,
- and a passage formed by a connection from the exhaust port of said canister to the inflow port for introducing the fuel vapor of said condensation apparatus and said connection can be switched from the latter to an inflow port for the fuel vapor flow into an engine.
Dependencies are inferred from the claim text.