Abstract: An additive tank for a vehicle having an internal combustion engine, the tank including a flexible bag which contains the additive and is connected to a device allowing the flexible bag to be pressurized in order to meter the additive.

Abstract: A process and device for extrusion/molding of thermoplastic hollow bodies using at least one extruder and at least two molds and including the extrusion of a flow of material, its cutting into parisons, and the molding of the parisons to produce the hollow body, alternately in the first mold and then in the second mold. The process may work in parallel for certain of its operations. The process and the device are well suited for producing hollow bodies of complex three-dimensional geometry with a high productivity.

Abstract: A method for fixing a component onto a plastic fuel tank produced as a single piece by molding. In the method a parison is introduced into a mold; the parison is pressed against the mold; at least part of the component is introduced into the parison and secured thereto; the tank is removed from the mold; an opening is made in the tank; the part of the component is detached from the tank through the opening; and this part of the component is fixed to the opening of the tank by an assembly member.

Abstract: An electronically controlled electromechanical valve having at least three ports through which a fluid can flow and at least three different stable positions in which at least 2 ports are in fluid communication. The valve includes a stationary outer housing including at least three bores, a rotating inner section that rotates about an axis and includes bores defining, with the bores of the housing, the at least three ports of the valve, and an electrical actuating system controlled by an electronic controller and configured to switch the valve from one position to another by rotating the inner section about its axis. A fuel system vapor management unit can include such a valve.

Abstract: A fuel vapor storage and recovery apparatus for a fuel system of a motor vehicle including an internal combustion engine with an exhaust pipe and a fuel tank containing a fuel vapor/air mixture above a liquid fuel, the exhaust pipe being close to the fuel tank. The apparatus includes a vapor storage canister including a fuel vapor adsorbent material therein, a thermal insulation mechanism for thermally insulating at least a portion of the fuel tank from the heat generated by the exhaust pipe, and a heat exchanger. The heat exchanger is configured to heat to a purge temperature air guided there through by absorbing heat from the thermal insulation mechanism.

Abstract: Method for preparing a hollow element of a fuel system The present invention relates to a method for preparing a hollow element of a fuel system comprising that a hollow element comprising a polymeric surface is subjected to an activation step and to a grafting step. In the grafting step, a fluorinated C2-C4 hydrocarbon is grafted onto the activated polymeric surface of the hollow element. The invention further relates to a hollow element obtainable by the method of the invention and to the use of a fluorinated C2-C4 hydrocarbon for reducing the permeability of products such as fuel tanks or a fuel pipes with respect to methanol and/or hydrocarbons.

Abstract: Device and associated method for attaching a component (1) to a hollow body with a wall (4) made of plastic of multilayer structure comprising at least one layer of barrier material (5), the device comprising one or more O-ring seals (6) arranged in a groove formed at the periphery of the component (1) or in the wall (4) of the hollow body, at least one of the O-ring seals (6) being compressed radially and being in contact with the layer of barrier material (5). Fuel system for motor vehicles comprising a tank and at least one component (1) attached to the tank by this device.

Abstract: A device for assembling a shield containing at least one hole onto a tank, a shield intended for such a device, an assembly method using the device, and a tank including the device. The device includes a base configured to be firmly attached to a wall of the tank, and a head used for fixing the shield, the head including a groove whose lower and upper lateral surfaces intersect an axis of the device substantially normal to the wall of the tank, the groove being used such that the edge of the hole in the shield slides into the groove. The device also includes a non-return stub that emerges from the outer surface of the device and prevents detachment of the shield from the tank.

Abstract: A fuel system, and a method for manufacturing such a fuel system, for an internal combustion engine operating with a liquid fuel and including a fuel reservoir intended for the fuel and an additive reservoir including a chamber formed in a concave recess of the wall of the fuel reservoir.

Abstract: A system for supplying an internal combustion engine with a liquid fuel, comprising a tank, a pipe for the circulation of hot fuel between the engine and the tank and at least one sealed composite junction conduit for joining the pipe to the tank. The composite junction conduit includes at least two hollow components each based on a different plastic, the components being mechanically attached to each other and in communication with each other and include, between them, an overmoulded seal.

Abstract: Layer made of base plastic comprising, in the dispersed form, nodules with a diameter of less than or equal to one micron comprising barrier plastic incompatible with the base plastic; multilayer structure comprising at least one such layer and process for the manufacture of such layers/structures.

Abstract: A dosing pump for a liquid additive in the fuel of a heavy fuel engine. The pump includes a piston, a cylinder and an actuator for moving the piston axially in the cylinder. The actuator is a high resolution linear actuator.

Abstract: A system for locking a closure mechanism for a fuel-tank filler pipe covered by a fuel flap, the closure mechanism includes a shutter allowing automatic opening of the pipe via action of a fuel-dispensing nozzle, this shutter being retractable through action of thrust directed against it along an axis parallel to the axis of the pipe head and integral with a return spring allowing it to be held in the closed position. The system includes a lever integral with the closure mechanism and having the effect of locking/unlocking it, depending on its position, and a lever arm, integral with the fuel flap, that can act effectively on the lever only to lock the mechanism when it is unlocked and the fuel flap is being closed.

Abstract: A closure device for a filler pipe of a tank intended to contain a liquid, the device including a valve that includes a valve body in communication with the pipe and a plug that can be moved in the valve body between a closed position and an open position of the valve. The body of the valve includes an inlet opening closed off by a flap that can be moved between an open position and a closed position, and an outlet opening. The flap is connected to the plug by a coupling such that a thrust exerted on the flap by a tubular end of a nozzle for admitting liquid into the tank causes the flap to tilt in the casing of the valve and the plug to rotate, placing a cylindrical opening in the plug in alignment with inlet and outlet openings in the valve body.

Abstract: A fuel tank system includes a fill tube in communication with a tank; and a sealing device in the fill tube. A vent valve is mounted on the tank, the vent valve being open during a filling operation of the tank with a fuel and during periods of normal use of the tank. A vent pipe has a first end connected to the tank and with a second end in communication with the fill tube. The vent pipe is configured to allow vapors to escape from the tank without creating a substantial over pressure inside the tank so that the filling operation takes place without pressure in the tank, and the vent valve is open during the filling operation without pressure in the tank.

Abstract: Heater for heating a fluid intended to pass through a fuel tank canister. The heater comprises: a casing provided with a coupler for coupling to the canister; at least two plates placed inside the casing in substantially parallel planes, through which plates the fluid flows; and at least one heating element housed between said plates. The coupler is placed in a plane substantially parallel to at least one plane of one of the plates and the projected area of the coupler on said plane of one of the plates lies substantially within the projected area of the casing on said plane.

Abstract: Valve for the venting circuit of a liquid tank, said valve containing: a) a chamber (3) which opens into the tank and is connected via an aperture to the venting circuit; b) a float containing a head provided with a needle and able to slide vertically inside the chamber; and c) a closure member for closing off the venting aperture and itself having an aperture that can be closed off by the needle of the float, the closure member having a flexible seal which is capable of moving substantially vertically relative to the head of the float, said head being provided with a device for limiting the movement of the seal