US 2013/0075394 A1Published application

Fill-up control valve device

AssigneeKyosan Denki Co., Ltd.

InventorKeiji SUZUKI

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Abstract

A casing includes a container in which a float valve is disposed. When the float valve is closed, the casing keeps the float valve in a closed state for a relatively long period of time. A sub-float valve is provided below the container in the casing, and is closed by floating on fuel at the time of a turn of a vehicle or an automatic stop of first refueling. When the first refueling is completed, air in the sub-float valve is discharged, and the sub-float valve loses its floating function.

Claims10

Dependent claims

A fill-up control valve device comprising:

a casing which is mounted to a fuel tank installed in a vehicle and in which a ventilation passage that communicates an interior of the fuel tank with an exterior of the fuel tank to allow gas in the interior of the fuel tank to be discharged to the exterior of the fuel tank is formed;
and
a first float valve that is provided vertically movably in an accommodation space formed in the casing, that floats on liquid fuel in the casing, and that is configured to open and close the ventilation passage with a vertical movement of a fuel surface in the casing, wherein:
the first float valve is configured to close the ventilation passage when a fuel surface in the fuel tank rises and reaches a first predetermined and a fuel surface in the casing is pressed up to a second predetermined level higher than the first predetermined level;
the casing has a vent hole that is provided above the second predetermined level and that communicates an interior space of the fuel tank with the accommodation space;
the casing includes a container which has a bottom surface and in which the first float valve is disposed;
the container includes an introduction port that is provided above the bottom surface and that introduces liquid fuel into the container until the liquid fuel reaches the second predetermined level, and a discharge passage that is provided below the introduction port to extend through the container and that discharges the liquid fuel introduced from the introduction port into the container to an exterior of the container, wherein the discharge passage has a passage cross-sectional area smaller than an opening area of the introduction port;
the fill-up control valve device further comprises a second float valve that is provided vertically movably in an accommodation space formed in an upstream portion of a location in the casing where the container is disposed in a discharge direction of the ventilation passage, and that is configured to open and close the ventilation passage with a vertical movement of a fuel surface in the casing;
the second float valve has an air storage recess that is recessed upward from a lower-end surface of the second float valve, and an air-discharge hole that communicates the air storage recess with the ventilation passage located on a downstream side of the second float valve in the discharge direction;
the second float valve is configured to float on liquid fuel in the casing to close the ventilation passage (i) when air is stored in the air storage recess, in a case that a fuel surface in the fuel tank rises and reaches the first predetermined level, and then a fuel surface in the accommodation space formed in the upstream portion in the casing is pressed up to a third predetermined level higher than the first predetermined level;
and
the second float valve is configured not to float on liquid fuel in the casing to open the ventilation passage (ii) when air in the air storage recess is discharged from the air-discharge hole and the liquid fuel enters into the air storage recess, in a case that a fuel surface in the fuel tank rises and reaches the first predetermined level, and then a fuel surface in the accommodation space formed in the upstream portion in the casing is pressed up to a third predetermined level higher than the first predetermined level.

9 more elements

A fill-up control valve device comprising:

a casing which is mounted to a fuel tank installed in a vehicle and in which a ventilation passage that communicates an interior of the fuel tank with an exterior of the fuel tank to allow gas in the interior of the fuel tank to be discharged to the exterior of the fuel tank is formed;
and
a first float valve that is provided vertically movably in an accommodation space formed in the casing, and that is configured to open and close the ventilation passage with a vertical movement of a fuel surface in the casing,
wherein the casing includes a container which has a bottom surface and in which the first float valve is disposed;
the container includes an introduction port that is provided above the bottom surface and that introduces liquid fuel into the container, and a discharge passage that is provided below the introduction port to extend through the container and that discharges the liquid fuel introduced from the introduction port into the container to an exterior of the container, wherein the discharge passage has a passage cross-sectional area smaller than an opening area of the introduction port;
the casing has a vent hole that is provided at a position as high as or higher than the introduction port, and that communicates an interior space of the fuel tank with the accommodation space;
the fill-up control valve device further comprises a second float valve that is provided vertically movably in an accommodation space formed in an upstream portion of a location in the casing where the container is disposed in a discharge direction of the ventilation passage, and that is configured to open and dose the ventilation passage with a vertical movement of a fuel surface in the casing;
the second float valve has an air storage recess that is recessed upward from a lower-end surface, and an air-discharge hole that communicates the air storage recess with the ventilation passage located on a downstream side of the second float valve in the discharge direction.

5 more elements

Dependencies are inferred from the claim text.

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Abstract

A fill-up control valve device comprising:

a casing which is mounted to a fuel tank installed in a vehicle and in which a ventilation passage that communicates an interior of the fuel tank with an exterior of the fuel tank to allow gas in the interior of the fuel tank to be discharged to the exterior of the fuel tank is formed;
and
a first float valve that is provided vertically movably in an accommodation space formed in the casing, that floats on liquid fuel in the casing, and that is configured to open and close the ventilation passage with a vertical movement of a fuel surface in the casing, wherein:
the first float valve is configured to close the ventilation passage when a fuel surface in the fuel tank rises and reaches a first predetermined and a fuel surface in the casing is pressed up to a second predetermined level higher than the first predetermined level;
the casing has a vent hole that is provided above the second predetermined level and that communicates an interior space of the fuel tank with the accommodation space;
the casing includes a container which has a bottom surface and in which the first float valve is disposed;
the container includes an introduction port that is provided above the bottom surface and that introduces liquid fuel into the container until the liquid fuel reaches the second predetermined level, and a discharge passage that is provided below the introduction port to extend through the container and that discharges the liquid fuel introduced from the introduction port into the container to an exterior of the container, wherein the discharge passage has a passage cross-sectional area smaller than an opening area of the introduction port;
the fill-up control valve device further comprises a second float valve that is provided vertically movably in an accommodation space formed in an upstream portion of a location in the casing where the container is disposed in a discharge direction of the ventilation passage, and that is configured to open and close the ventilation passage with a vertical movement of a fuel surface in the casing;
the second float valve has an air storage recess that is recessed upward from a lower-end surface of the second float valve, and an air-discharge hole that communicates the air storage recess with the ventilation passage located on a downstream side of the second float valve in the discharge direction;
the second float valve is configured to float on liquid fuel in the casing to close the ventilation passage (i) when air is stored in the air storage recess, in a case that a fuel surface in the fuel tank rises and reaches the first predetermined level, and then a fuel surface in the accommodation space formed in the upstream portion in the casing is pressed up to a third predetermined level higher than the first predetermined level;
and
the second float valve is configured not to float on liquid fuel in the casing to open the ventilation passage (ii) when air in the air storage recess is discharged from the air-discharge hole and the liquid fuel enters into the air storage recess, in a case that a fuel surface in the fuel tank rises and reaches the first predetermined level, and then a fuel surface in the accommodation space formed in the upstream portion in the casing is pressed up to a third predetermined level higher than the first predetermined level.

9 more elements