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US 2003/0196645 A1Published application
Evaporative fuel emission control system
AssigneeToyota Jidosha Kabushiki Kaisha
InventorsSusumu Kojima, Hidefumi Aikawa
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AssigneeToyota Jidosha Kabushiki Kaisha
InventorsSusumu Kojima, Hidefumi Aikawa
Estimating the term…
An evaporative fuel emission control system includes a canister that adsorbs fuel vapor generated in a fuel tank, a canister outgoing gas producing unit that causes a canister outgoing gas to flow out of the canister, a vapor condensing unit that condenses the canister outgoing gas to provide a processed gas containing a higher concentration of fuel vapor than that of the canister outgoing gas, and a processed gas passage through which the processed gas is fed to the fuel tank. A controller of this system is operable to restrict flow of the processed gas into the fuel tank when the fuel vapor concentration in the processed gas is lower than or is expected to be lower than a predetermined level.
An evaporative fuel emission control system for an internal combustion engine, comprising:
An evaporative fuel emission control system for an internal combustion engine, comprising:
An evaporative fuel emission control system for an internal combustion engine, comprising:
Dependencies are inferred from the claim text.
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From the US filing history. Foreign family members aren’t listed.
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Adding fuel vapours drawn from engine fuel reservoir: layout of the fuel vapour installation
Adding fuel vapours drawn from engine fuel reservoir: with means to heat or cool the canister
Supplying combustion engines in general with combustible mixtures or constituents thereof
Term end not estimated
The disclosures of Japanese Patent Applications No.2002-115337 filed on Apr. 17, 2002 and No. 2002-121902 filed on Apr. 24, 2002, each including the specification, drawings and abstract, are incorporated herein by reference in their entireties.
1. Field of the Invention
The invention relates to an evaporative fuel emission control system, and in particular to an evaporative fuel emission control system for processing fuel vapor generated in a fuel tank of an internal combustion engine, without releasing the fuel vapor to the atmosphere.
The foregoing and/or further objects, features and advantages of the invention will become more apparent from the following description of exemplary embodiments with reference to the accompanying drawings, in which like numerals are used to represent like elements and wherein:
FIG. 1 is a view schematically showing the construction of an evaporative fuel emission control system according to a first embodiment of the invention;
FIG. 2 is a view useful for explaining the principle of working of a separation film provided in the system of the first embodiment;
First Embodiment
FIG. 1 schematically shows the construction of an evaporative fuel emission control system according to the first embodiment of the invention. As shown in FIG. 1, the system of the first embodiment includes a fuel tank 10. A low-pressure feed pump 12 (which will be simply called “feed pump 12”) is disposed inside the fuel tank 10. The feed pump 12 communicates with a suction pipe 14 for sucking up fuel in the fuel tank 10, and also communicates with a fuel pipe 16 through which the fuel is fed to an internal combustion engine that is not illustrated in FIG. 1.
The fuel tank 10 communicates with a canister 20 via a vapor passage 18. The canister 20 contains activated carbon. Fuel vapor generated in the fuel tank 10 flows into the canister 20 through the vapor passage 18, and is adsorbed on the activated carbon within the canister 20.