Abstract: A fuel tank structure comprising a fuel tank; a canister that adsorbs evaporated fuel within the fuel tank, and that releases vapor after adsorption of evaporated fuel; a full tank regulating valve within the fuel tank that becomes a closed state due to a float floating in fuel when a fuel liquid surface reaches a full tank liquid level that is set in advance; a communication pipe that communicates the fuel tank and the canister via the full tank regulating valve, a cross-sectional area varying valve that, when tank internal pressure that is applied from inside of the fuel tank increases, reduces a cross-sectional area of a flow path of vapor that flows toward the float; and a suppressing member that is positioned between the cross-sectional area varying valve and the float, and that suppresses airflow from the cross-sectional area varying valve from directly abutting the float.

Abstract: A fuel vapor control device has a flow control valve which regulates a flow amount of fuel vapor from a fuel tank to a canister. The flow control valve has a movable element accommodated in a case. The movable valve element has a central cylindrical part, an outer cylindrical part, and a disc part which connects the central cylindrical part and the outer cylindrical part. The central cylindrical part provides a central channel. The central channel provides a main channel which communicates an inlet and an outlet. A sub channel defined and formed between the movable element and the case is opened and closed by a valve formed by the case and the outer cylindrical part. The central channel makes easy setting of flow amount in regulated condition. Since turbulence is reduced, it is possible to perform stable regulation.

Abstract: A fuel vapor control device has a flow control valve which regulates a flow amount of fuel vapor from a fuel tank to a canister. The flow control valve has a movable element accommodated in a case. The movable valve element has a central cylindrical part, an outer cylindrical part, and a disc part which connects the central cylindrical part and the outer cylindrical part. The central cylindrical part provides a central channel. The central channel provides a main channel which communicates an inlet and an outlet. A sub channel defined and formed between the movable element and the case is opened and closed by a valve formed by the case and the outer cylindrical part. The central channel makes easy setting of flow amount in regulated condition. Since turbulence is reduced, it is possible to perform stable regulation.

Abstract: A fuel tank structure comprising a fuel tank; a canister that adsorbs evaporated fuel within the fuel tank, and that releases vapor after adsorption of evaporated fuel; a full tank regulating valve within the fuel tank that becomes a closed state due to a float floating in fuel when a fuel liquid surface reaches a full tank liquid level that is set in advance; a communication pipe that communicates the fuel tank and the canister via the full tank regulating valve, a cross-sectional area varying valve that, when tank internal pressure that is applied from inside of the fuel tank increases, reduces a cross-sectional area of a flow path of vapor that flows toward the float; and a suppressing member that is positioned between the cross-sectional area varying valve and the float, and that suppresses airflow from the cross-sectional area varying valve from directly abutting the float.

Abstract: A fuel-outflow check valve includes: a casing, at least one portion of which is located in a fuel tank, the casing having a ventilation hole via which the interior of the casing and the interior of the fuel tank communicate with each other and an upper wall portion protruding inward from the inner peripheral face of the casing; a float that is disposed in the interior of the casing and is vertically movable; and a valve element that is provided on the float and can contact a valve seat formed at the casing.

Abstract: A fuel-outflow check valve includes: a casing, at least one portion of which is located in a fuel tank, the casing having a ventilation hole via which the interior of the casing and the interior of the fuel tank communicate with each other and an upper wall portion protruding inward from the inner peripheral face of the casing; a float that is disposed in the interior of the casing and is vertically movable; and a valve element that is provided on the float and can contact a valve seat formed at the casing.