A fuel filler device for filling fuel into a vehicle tank, includes a filler pipe for receiving a fuel filler nozzle, which filler pipe can be connected with the vehicle tank. At least one pivotably mounted closing flap is arranged in the filler pipe. A spring element is provided, which biases the at least one closing flap into a closing position closing a passage through the filler pipe. The at least one closing flap is pivotable from the closing position into an opening position opening a passage through the filler pipe as a result of the fuel filler nozzle inserted into the filler pipe. At least one valve element forms at least one bypass to the at least one closing flap, and from a limit pressure difference, allows a passage of gas out of the filler pipe and/or into the filler pipe.

Methods and systems are provided for aging a new plastic fuel tank in a vehicle. In one example, during a plug-in event to recharge a battery of the vehicle, the fuel tank is isolated and the fuel pump is actuated to agitate fuel within the tank and increase fuel vapors until the plastic fuel tank becomes aged to a predetermined degree by fuel vapors generated therein. In this manner, the fuel tank is aged more rapidly, resulting in more accurate fuel level readings and less noise and vibration.

A fuel tank includes a tank main body configured to reserve a quantity of fuel therein and an oil feed tube fitted to the tank main body to form a fuel feed port. The fuel feed tube has a tip end configured to protrude inwardly of the tank main body, and the tip end is positioned below the upper limit level of the fuel. At a location of the fuel feed tube above the upper limit level, a vent hole is formed to communicate between the interior of the tank main body and the interior of the oil feed tube.

The resinous filler port includes: a filler-port body including a nozzle insertion port through which a filler nozzle is insertable, a fuel supply port supplying a fuel supplied from the filler nozzle to a fuel tank by way of a filler tube, and a vapor inlet port letting flow in vapors arising from the fuel and passing through a breather tube from a side of the fuel tank; a joint formed to penetrate through from one of opposite ends thereof to another one of the opposite ends, fitted undetachably into and around the vapor inlet port at the one of the opposite ends, and connected with the breather tube at the other one of the opposite ends; and a flow control valve accommodated inside the joint, and controlling a flow volume of the vapors flowing into the filler-port body from the breather tube.

A fuel supply device includes an inlet pipe, a first end of the inlet pipe configured to be connected to an oil supply port and a second end of the inlet pipe configured to be connected to a fuel tank and an air flow path, an upstream side end of the air flow path configured to be open to the outside and a downstream side end of the air flow path configured to be connected to the fuel tank. The air flow path includes a negative pressure valve configured to move a valve body to open a valve port when the pressure in the fuel tank becomes a negative pressure and an air filter disposed upstream of the negative pressure valve.

Methods and systems are provided for aging a new plastic fuel tank in a vehicle. In one example, during a plug-in event to recharge a battery of the vehicle, the fuel tank is isolated and the fuel pump is actuated to agitate fuel within the tank and increase fuel vapors until the plastic fuel tank becomes aged to a predetermined degree by fuel vapors generated therein. In this manner, the fuel tank is aged more rapidly, resulting in more accurate fuel level readings and less noise and vibration.

An operating medium tank arrangement for a motor vehicle includes an operating medium tank; a filling tube for refueling the operating medium tank, wherein the filling tube is fluidly connected on one side to the operating medium tank and on the other side has an insertion opening for receiving a refueling device; a guide insert arranged in the filling tube for guiding the refueling device; and a liquid separator including a separator chamber which is divided into a first sub-chamber and a second sub-chamber, wherein the first sub-chamber is fluidly connected to the operating medium tank via a ventilation line, wherein the second sub-chamber is fluidly connected to a filter device, wherein the separator chamber is fluidly connected to the filling tube for purging operating medium separated in the liquid separator into the filling tube, and wherein the first sub-chamber and the second sub-chamber are fluidly connected with each other via a labyrinth separator which is formed by the liquid separator and the filling tube.

In an opening and closing device (100) for a fuel tank, a path forming part (20) forms a fuel path (100P) along which supplied liquid fuel is guided to the fuel tank. A first valve mechanism (10) arranged at the path forming part (20) opens and closes a filling opening (104). A second valve mechanism (30) opens and closes an insertion path (100Pn) for a fuel nozzle (FN) at the end of the insertion path (100Pn) in the most upstream area of the fuel path (100P). In a non-filling situation in which the first valve mechanism (10) closes the filling opening (104), passage of air between an insertion path communication hole (51) and an outside air passage hole (53) is encouraged. In a filling situation in which the fuel nozzle (FN) makes the first valve mechanism (10) open the filling opening (104), passage of air between the insertion path communication hole (51) and the outside air passage hole (53) is interrupted. Therefor the opening and closing device (100) for the fuel tank prevents or reduces discharge of fuel in a fuel filling period while ensuring air permeability in a non-filling period.

A shutoff vent is disclosed. A main body has a first end and a second end. The main body defines a first opening towards the first end, a second opening towards the second end, and a mating port between the first opening and the second opening. The first opening and the second opening are in communication through the mating port to define a gas passageway. A translatable plug is disposed within the main body, and the gas passageway extends past the translatable plug. The translatable plug is configured to reversibly translate towards the second end to sealably obstruct the mating port. In some examples, the translatable plug is configured to translate towards the second end when force is applied to the translatable plug from the first end.

A fuel filler device for filling fuel into a vehicle tank, includes a filler pipe for receiving a fuel filler nozzle, which filler pipe can be connected with the vehicle tank. At least one pivotably mounted closing flap is arranged in the filler pipe. A spring element is provided, which biases the at least one closing flap into a closing position closing a passage through the filler pipe. The at least one closing flap is pivotable from the closing position into an opening position opening a passage through the filler pipe as a result of the fuel filler nozzle inserted into the filler pipe. At least one valve element forms at least one bypass to the at least one closing flap, and from a limit pressure difference, allows a passage of gas out of the filler pipe and/or into the filler pipe.