A fuel storage system is provided for storing dimethylether (DME), a blend including DME, or other similar highly volatile fuel at a vehicle. The fuel storage system including a main storage tank, an expansion tank, a fuel filling receptacle configured to receive a fuel filling nozzle of a filling station, and a valve arrangement having at least a normal operating setting and a fuel filling setting. The valve arrangement in the normal operating setting provides a fuel passage between the main storage tank and the expansion tank, and the valve arrangement in the fuel filling setting both provides a fuel passage between the fuel filling receptacle and the main storage tank and prevents fuel flow between the main storage tank and the expansion tank. The fuel storage system is configured to mechanically prevent disconnection of the fuel filling nozzle from the fuel filling receptacle unless the valve arrangement is in the normal operating setting. A corresponding method, as well as a further example embodiment of the fuel storage system, are also provided.

A fuel filler structure capable of use with a fuel feeding pipe prevents efficiency of sucking volatile fuel from being decreased during refueling even if a drain hole is formed, and includes: a cylinder that includes an opening and a connecting port; a first flap mechanism that is arranged near the opening of the cylinder and opens the opening when a nozzle is inserted; a drain hole that is formed in the cylinder and communicates inside the cylinder with outside; and a drain hole switching valve that opens and closes the drain hole, wherein the drain hole switching valve has a closing mechanism including a valve body that is pressed by the nozzle when the nozzle is inserted through the opening, so that the drain hole is closed.

A fuel filler device that includes a flow conduction device arranged in a filler line and configured such that during a filling, an outlet pipe of a pump nozzle is guided and supported therein, and an attachment connected to the flow conduction device. The attachment includes a first attachment end, a second attachment end, and a constriction extending between the first attachment end and the second attachment end such that the attachment tapers from the first attachment end to the second attachment end via the constriction. At least one first gap is formed between the first attachment end and the flow conduction device so that during a filling sequence, fuel vapour introduced into the fuel filler device may flow through the at least one first gap into the filler line in a direction of a fuel tank connected to the filler line.

A saddle riding vehicle includes: a fuel tank supported by a body frame; a filler opening provided in an upper surface of the fuel tank; a tank cover covering the upper surface of the fuel tank; and a fuel sump collecting fuel overflowing from the filler opening. The saddle riding vehicle includes a shroud covering a side surface of the fuel tank. The fuel sump is placed around the filler opening and under the tank cover. The fuel sump includes a drain pipe discharging fuel downward. The drain pipe extends between the tank cover and the shroud.

An apparatus for controlling an engine start during refueling of a hybrid vehicle includes a controller configured to: stop an engine to block the engine start by sensing whether the vehicle enters into a refueling state in accordance with a fuel injection port open or closed state, a vehicle speed, and brake pedal state (BPS) information, and start the engine to release blocking of the engine start in accordance with a switchover to a hybrid electric vehicle (HEV) mode by sensing whether the refueling state has been released in accordance with the fuel injection port open or closed state, the vehicle speed, and acceleration pedal state APS) information.

Methods and systems are provided for indicating whether a canister purge valve in a vehicle evaporative emissions control system is degraded. In one example, an air intake system hydrocarbon (AIS HC) trap temperature may be monitored during a refueling event, and responsive to an indication that the AIS HC trap temperature change is greater than a predetermined threshold, it may be indicated that the canister purge valve is degraded. In this way, diagnosis of whether a vehicle canister purge valve is degraded may be indicated without the use of engine manifold vacuum, and may be advantageous for vehicles configured to operate for significant amounts of time without engine operation, or without intake manifold vacuum.

Methods and systems are provided for indicating whether a canister purge valve in a vehicle evaporative emissions control system is degraded. In one example, an air intake system hydrocarbon (AIS HC) trap temperature may be monitored during a refueling event, and responsive to an indication that the AIS HC trap temperature change is greater than a predetermined threshold, it may be indicated that the canister purge valve is degraded. In this way, diagnosis of whether a vehicle canister purge valve is degraded may be indicated without the use of engine manifold vacuum, and may be advantageous for vehicles configured to operate for significant amounts of time without engine operation, or without intake manifold vacuum.

The safety spill-proof fuel tank structure includes a fuel tank body. The fuel tank body has an outlet tube at the bottom and an inlet tube at the top. The fuel tank body has a fixed vertical plane and a placement plane opposite to the fixed plane. The fixed plane has a fixed support. The inlet tube has a spill-proof spacer on its inner wall. There is a fuel filler used for filling fuel into the fuel tank body between the spill-proof spacer and the inner wall far away from the placement plane inside the inlet tube. When the placement plane of the fuel tank body is placed downwards, the spill-proof spacer can prevent fuel outflow from the fuel tank body and avoid wasting of fuel.

A separation nipple to separate a liquid from a vent inlet line into a filler pipe of a motor vehicle. The separation nipple has an inlet for connection to the vent inlet line, an outlet for connection to a vent outlet line, an opening for connection to an interior of the filler pipe, and a flap to close the opening. The flap has a main flap surface and a reflector flap surface which slopes relative to the main flap surface. The reflector flap surface is configured to form a reflector with the main flap surface when the flap is in an open position, the reflector being configured to deflect liquid passing through the opening in a direction of an end of the tank of the filler pipe. The opening is configured for closing by the main flap surface when the flap is in a closed position.

A fueling apparatus includes a filler tube including: a fitable cylindrical portion fitted around an outer peripheral face on a filler neck's outlet side; a tapered cylindrical portion formed to have a major diameter on one of the opposite sides adjacent to the fitable cylindrical portion, and formed to have a minor diameter on the other opposite side across from the fitable cylindrical portion; and a minor-diameter cylindrical portion connected to the tapered cylindrical portion on the minor-diameter side, formed to have a minor diameter being smaller than that of the fitable cylindrical portion, and formed to have a predetermined inside diameter being set up based on a fuel distribution condition from the filler neck to the fuel tank. The filler neck is formed to have an outlet inside diameter being larger than the predetermined inside diameter in the minor-diameter cylindrical portion of the filler tube.