A tank venting system in accordance with the present disclosure includes a vent apparatus for regulating flow of fuel vapor between a fuel tank and a fuel vapor recovery system in a vehicle. The flow of fuel vapor is controlled to maintain the pressure of fuel vapor in the fuel tank at a certain pressure level or within a certain pressure range during different modes of use.

A valve assembly includes a seat separating a cavity of a valve body into a first cavity portion and a second cavity portion. The assembly includes a cover device separating the first cavity portion into a first pocket and a second pocket. The cover device defines at least one hole to provide fluid communication between an aperture of the seat and an outlet of the valve body via the hole. The cover device is movable between a rest position to restrict fluid communication between the aperture and the hole, and an actuated position to increase fluid communication between the aperture and the hole when a vacuum is created in the first cavity portion. The aperture is in direct fluid communication with the first pocket when in the actuated position. The outlet is in direct fluid communication with the second pocket when in the rest and actuated positions.

An evaporative emissions control system includes a first vent valve configured to selectively open and close a first vent, a second vent valve configured to selectively open and close a second vent, a fuel level sensor configured to sense a fuel level in the fuel tank, a pressure sensor configured to sense a pressure in the fuel tank, an accelerometer configured to measure an acceleration of the vehicle, and a controller configured to regulate operation of the first and second vent valves to provide pressure relief for the fuel tank. The controller is programmed to determine if a refueling event is occurring based one signals indicating the fuel level is increasing, the pressure in the fuel tank is increasing, and the vehicle is not moving, and open at least one of the first and second vent valves based on determining the refueling event is occurring.

An engine control device for a saddle riding vehicle includes a mechanical centrifugal clutch for connecting and disconnecting driving force from an engine to a driving wheel, a throttle operator to adjust output power of the engine, a motor to rotate a crankshaft of the engine, and a control unit to control the motor and a fuel injection system. The control unit executes injection stopping control for stopping fuel injection during deceleration of the vehicle and executes, when an opening operation of the throttle operator is performed after an engine speed becomes equal to or lower than a centrifugal clutch disconnection speed at which the centrifugal clutch is disconnected, acceleration assist control for rotating the crankshaft with the motor.

A fuel system for a vehicle includes a fuel tank configured to provide fuel to an engine of the vehicle, a shutoff valve configured to selectively restrict a flow of the fuel along a flow path between the fuel tank and the engine, a temperature sensor configured to monitor a temperature of at least one of the engine of the vehicle or a temperature associated with a body area of the vehicle and provide a temperature signal, and a controller coupled to the temperature sensor and the shutoff valve. The controller is configured to control the shutoff valve to restrict the flow of the fuel in response to the temperature signal indicating a temperature in excess of a temperature threshold.

Filling methods and systems are provided for a conformable fuel tank. In one example, a system comprises an active thermal management arrangement for the conformable fuel tank. The active thermal management arrangement comprises one or more recirculation passage for mixing hot fuel distal to an inlet port of the conformable fuel tank with cool incoming fuel flowing to the inlet port.

Methods and systems are provided for conducting an evaporative emissions test on a fuel system and an emissions control system in a vehicle. In one example, in response to an indication that a vehicle parking condition may result in the isolation of the fuel system from the emissions control system via the unintentional closing of fuel tank valves, a vehicle's active suspension system may be employed in order to level the vehicle a determined amount such that the fuel system isolation issues may be mitigated prior to an evaporative emissions test procedure. In this way, the entire fuel system and emissions control system may be diagnosed for potential undesired emissions, and potential violations of regulatory requirements for evaporative emissions testing may be reduced.

In one example in accordance with the present disclosure, a method is described. According to the method, an actual volume of fuel added to at least one fuel tank is determined. It is also determined, an amount of fuel indicated as having been added to the fuel tank from a refueling station. The actual volume added is compared to the amount of fuel indicated as having been added to determine a difference between the two values.

A tank adapter has a body with first and second ends and an axial hole. A hollow cylinder of the body has an external tapered thread from the first end toward the second end of the body. A flange between the first and second ends has a flat face extending radially outward from the hollow cylinder to a flange outer diameter. A gage mount portion has a gage mount outer diameter that is less than the flange outer diameter and extends from the second end toward the first end and has gage mounting features for securing a level gage. A gasket mates with the flat face. In a first configuration, the external tapered thread engages an internal tapered thread of a first tank opening. In a second configuration, a collar nut compresses the gasket between the flange and a top rim of a second tank opening.

Methods and systems are provided for conducting remote refueling events of a passenger vehicle, and for coordinating said remote refueling events with a fuel tank fill level prior to the remote refueling event, a loading state of a fuel vapor storage device, and current and predicted fuel tank pressure. In one example, an amount of fuel that can be added to the fuel tank without overwhelming a capacity of the fuel vapor storage device is increased responsive to scheduling the remote refueling event to take place at a time when the fuel tank is at a negative pressure, thus resulting in partial purge of the fuel vapor storage device prior to commencing refueling. In this way, environmentally friendly refueling events may be enabled, thus reducing the potential for undesired evaporative emissions during refueling events.