Stepper driven valve for controlling fluid communication between a fuel tank and a canister

A fuel system comprising:

• a fuel tank,
• a filler pipe for adding liquid fuel,
• a carbon canister for collecting fuel vapors from the fuel tank during a refueling operation,
• a stepper motor, and
• a stepper driven valve for controlling a pressure differential by regulating the fluid flow between the fuel tank and the canister, said valve being configured for being actively positionable by the stepper motor in a closed position, an open position creating a fluid flow passageway with a first size, and one or more intermediate positions each creating a fluid flow passageway with a size which is smaller than said first size and comprising a moving element, movable relative to a valve opening between a closed position and an opened position, the moving element comprising:
• a core part with a substantially cylinder shape, the core part including a hollow portion which is open at an end thereof in a valve upstream direction,
• a circular part with a plate shape which is arranged upstream and orthogonal to the core part, the circular part including a central part,
• sealing means for making a leak tight seal, and
• deflecting means for controlling the fluid flow, said deflecting means being adapted to be located upstream relative to sealing means and protruding inside the valve opening to create said fluid flow passageways,
• wherein the valve opening has a truncated conical shape,
• wherein the sealing means and deflecting means are made in a unitary single piece and are formed of a material comprising an elastomer, and
• wherein in one of the intermediate positions, a shaft of the stepper motor is located in the hollow portion of the core part.