Fuel Tank Unit
AssigneeAisan Kogyo Kabushiki Kaisha
InventorNaohito BUSEKI
Life of this patent
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Abstract
A fuel tank unit may include a fuel tank, a canister configured to adsorb and desorb vapor generated in the fuel tank, a vapor conduit communicating the fuel tank with the canister, and a full tank fuel level limiting valve device connected to a fuel tank-side end of the vapor conduit. The full tank fuel level limiting valve device includes a full tank fuel level limiting valve and an actuator. The full tank fuel level limiting valve includes a float that is configured to float due to a buoyancy force of fuel in the fuel tank so as to close the full tank fuel level limiting valve when the fuel tank is filled up. The actuator includes a valve closure prevention member that is configured to move and press the float when the actuator is activated, so as to prevent the float from moving in a valve closing direction.
Claims12
A fuel tank unit, comprising:
- a fuel tank;
- a canister configured to adsorb and desorb vapor generated in the fuel tank;
- a vapor conduit in fluid communication with the fuel tank and the canister;
- and
- a full tank fuel level limiting valve device connected to a fuel tank-side end of the vapor conduit,
- wherein the full tank fuel level limiting valve device comprises a full tank fuel level limiting valve including a float that is configured to float due to a buoyancy force of fuel in the fuel tank so as to close the full tank fuel level limiting valve when the fuel tank is filled up, and an actuator configured to be activated due to a pressure difference between a tank inner pressure of the fuel tank and a pressure in the vapor conduit, and
- wherein the actuator includes a valve closure prevention member that is configured to move and press the float when the actuator is activated, so as to prevent the float from moving in a valve closing direction.
A fuel tank unit, comprising:
- a fuel tank;
- a canister configured to adsorb and desorb vapor generated in the fuel tank;
- a vapor conduit in fluid communication with the fuel tank and the canister;
- and
- a full tank fuel level limiting valve device connected to a fuel tank-side end of the vapor conduit,
- wherein the full tank fuel level limiting valve device comprises a full tank fuel level limiting valve including a float that is configured to float due to a buoyancy force of fuel in the fuel tank so as to close the full tank fuel level limiting valve when the fuel tank is filled up, and an actuator including an electric motor that is configured to be activated based on a signal from an electronic control unit electrically connected thereto, and
- wherein the actuator includes a valve closure prevention member that is configured to move and press the float when the electric motor is activated, so as to prevent the float from moving in a valve closing direction.
Dependencies are inferred from the claim text.