Patent ID: 9188236
Filing Date: 2015-11-17
Classification: B60K,F16K

Abstract:
1. A fill-up control valve device for use in a vehicle having a fuel tank, the fill-up control valve device comprising: a casing mounted to the fuel tank and including: a first float valve provided vertically movably in an accommodation space formed in the casing, the first float valve being configured to float on liquid fuel in the casing, and configured to open and close the ventilation passage with a vertical movement of a fuel surface in the casing; and a second float valve provided vertically movably in an accommodation space formed in an upstream portion of a location in the casing, the second float valve being 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 by a fuel flowing into the casing via the notch of the end cap and reaches a first predetermined level, 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: (i) an introduction port provided above the bottom surface and that introduces liquid fuel into the container until the liquid fuel reaches the second predetermined level, and (ii) a discharge passage provided below the introduction port to extend through the container and configured to discharge the liquid fuel introduced from the introduction port into the container to an exterior of the container, the discharge passage includes a passage cross-sectional area smaller than an opening area of the introduction port; the location of the second float valve is disposed in the casing where the container is disposed in a discharge direction of the ventilation passage; the second float valve has an air storage recess that is recessed upward, 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 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; the second float valve is configured to not float on liquid fuel in the casing to open the ventilation passage 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 by the fuel flowing into the case via the notch of the end cap 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; the casing includes an upper tubular case accommodating the first float valve, a lower tubular case accommodating the second float valve and a pipe; and the ventilation passage is formed within the casing to ventilate the lower tubular case, the upper tubular case and the pipe successively from the end of the casing at which the notch of the end cap is formed to allow gas in the fuel tank to be discharged.