Abstract: Ventilation valve for a liquid tank comprising: an housing comprising a side wall provided with ventilation openings, a cover provided with a ventilation aperture which may be connected to a venting circuit of the tank, and a base pierced with at least one drainage aperture; and a float capable of closing off the ventilation aperture, such float being able to slide vertically inside the housing depending on the level of liquid therein, the valve also comprising a drainage chamber located underneath the housing in which the valve slides, the chamber also comprising at least one drainage aperture that is not aligned with the drainage aperture of the base of the housing.

Abstract: A flange (101) for holding a quantity of fluid within a tank, such flange being equipped with a heating element comprising at least one resistive wire (102) for conducting an electrical current and dissipating heat as an effect of said current, wherein the heating element further comprises guiding means (103), and wherein the at least one resistive wire (102) is guided at a plurality of separate locations along its length by the guiding means (103) to form a heating surface, wherein a first part of the heating surface is present inside the flange (101) and a second part of the heating surface is present outside the flange (101).

Abstract: Noise reduction baffle for a fuel tank comprising a lower carrier and an upper sliding part which can slide relatively to the carrier thanks to compression springs mounted on retainers, said lower carrier having a hollow foot comprising two vertical or inclined walls defining an open cavity of elongated shape having a longitudinal axis, said cavity comprising at least one rib making an angle with the longitudinal axis of the cavity.

Abstract: Process for transferring a liquid from a passive tank (1) for storing the liquid to an active tank (2) using a pump intended for pumping the liquid held in the passive tank (1) and transferring it to the active tank (2), according to which the pump is commanded so as to transfer liquid from the passive tank (1) to the active tank (2) when said active tank (2) has a liquid level below a set point level Lsp and when the passive tank (1) contains liquid at a temperature above the freezing point of the liquid.

Abstract: Process for manufacturing a plastic fuel tank (FT) equipped with an internal accessory, by molding a parison using a mold comprising two cavities and a core, said process comprising the following steps: the parison is introduced into the mold cavities; the core is introduced inside the parison, the core having first been fitted with the accessory; the mold is closed so that the cavities come into leaktight contact with the core; the parison is pressed against the cavities by blowing through the core and/or applying a vacuum behind the cavities; the accessory is fastened to the parison by snap riveting using a device attached to the core; the mold is opened to withdraw the core; and the final molding of the parison is carried out by blow molding and/or thermoforming.

Abstract: Plastic fuel tank comprising a noise reduction baffle and interference sections for suppressing tank deformation in the case of application of negative pressure to said tank, the interference sections projecting inward in the tank from an upper surface and a lower surface thereof respectively, and being disposed so as to be substantially opposed with a specified interval between them, one of these sections being part of a fixation device which secures the baffle to the tank wall.

Abstract: Process for manufacturing a plastic fuel tank equipped with a pump, by molding a tubular parison cut into two sheets with the aid of a mould comprising two cavities and a core, said process comprising the following steps: introducing the parison into the mold cavities; introducing the core inside the parison, said core having first been fitted with a swirl pot comprising a housing for the pump; closing the mold so that the cavities come into leaktight contact with the core; pressing the parison against the cavities by blowing through the core and/or applying a vacuum behind the cavities; fastening the swirl pot to the parison using a device firmly attached to the core; carrying out the final molding of the parison by blow molding and/or thermoforming; unmolding the tank, and mounting the pump in the housing of the swirl pot.

Abstract: A hollow body (1) comprises an accessory module (2) fastened to the wall (13) thereof by being inserted by sliding into a slide (12) formed in said wall. The module (2) comprises a housing (20) and two flat and flexible wings (23) that extend from the housing in opposite directions, the distant edges (24) of said wings extending substantially parallel and being inserted respectively into the opposite grooves (14) of the slide, and the module also comprises at least one flexible fin (25) that extends from the housing, said fin (25) being shaped so that it is bent elastically during the sliding insertion of the module (2) into the slide (12) and so that its end (26) is facing a stop member (151) of the slide when the fin is not bent and is situated beyond the end of said slide in the direction of sliding.

Abstract: Process for manufacturing a plastic fuel tank equipped with an internal line by molding a parison using a mold comprising two cavities and a core, comprising the following steps: introducing the parison into the mold cavities; introducing the core inside the parison, said core having first been fitted with the line; closing the mold so that the cavities come into leaktight contact with the core; pressing the parison against the cavities by blowing through the core and/or applying a vacuum behind the cavities; fastening the line to the parison over at least two points using a device attached to the core; opening the mold to withdraw the core; and carrying out the final molding of the parison by blow molding and/or thermoforming, in which the line comprises, between its fastening points, a free length that is capable of coming into contact with the parison and/or with an accessory found thereon when the mold is closed, and wherein during the fastening step, at least one intermediate fastening point is created u

Abstract: A valve for the venting circuit of a liquid tank including a main chamber which opens into the tank and is connected via an aperture to the venting circuit, a float comprising a body, and a head capable of closing off the orifice. The float being able to slide vertically inside the main chamber. The valve further including a baffle surrounding the aperture and defining a secondary chamber via the bottom inside the main chamber. The dimensions and the shape of the secondary chamber, of the body of the float, and of the head of the float are designed so that the head can slide at least partly inside the secondary chamber, while the body of the float cannot do so.

Abstract: Method for fastening a component to a lower internal wall of a fuel tank comprising an opening, according to which: the tank is provided with a fastening point close to the opening and with relief(s) that make it possible to position the component at the location where it must be fastened; the component is inserted into the tank via the opening and it is positioned on the wall with the aid of the relief(s); a mechanical connection is created between the fastening point and the component with the aid of a support.

Abstract: A method for filling a reservoir on board a motor vehicle by a reserve cartridge. The reservoir includes a filler pipe, including a device for sealed attachment of the cartridge to the pipe. The cartridge includes a latching device configured to allow the fluid to flow from the reserve cartridge into the reservoir filler pipe only when the cartridge is attached in a sealed manner to the device on the pipe. The reserve cartridge is attached in a sealed manner to the pipe attachment device and the reserve cartridge latching device is unlatched so that the fluid can flow from the reserve cartridge into the filler pipe.

Abstract: A plastic adapter for fuel tanks. The adapter includes crimping lugs for fixing the adapter to a pipe or an opening in the tank.

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: SCR system for treating the exhaust gases of an internal combustion engine, this system comprising a line for feeding a urea solution into the exhaust gases and a pump capable both of feeding the urea solution into the exhaust gases and of purging at least one part of the line by sucking a gas therethrough by means of a suction device, this system also comprising a control unit capable of activating and/or deactivating the operation of the pump and that of the suction device in a sequential manner in the course of one and the same purge procedure.

Abstract: A method for storing an additive and injecting the additive into exhaust gases of an engine supplied with fuel from a fuel tank and returning unused excess hot fuel to the tank via a return line. The method heats the additive using a section of the return line when the additive temperature is below or equal to a threshold value, and short circuits the heating section when the additive temperature exceeds the threshold value. A system for implementing such a method includes an additive heating section including a section of the return line; a temperature sensor; and a device allowing the heating section to be short circuited when the temperature measured by the sensor exceeds the threshold value.

Abstract: A sensor for detecting a liquid level, including a measurement capacitor, a reference capacitor, an integrating capacitor, a calibration capacitor, a controller, an amplifier, a comparator, and a complementary calibration capacitor. The controller implements operations, over accumulation periods and for given target and discharge capacitors, of a target capacitor charging, a charge transfer, a decision, a conditional discharge, and a return. The target and discharge capacitors given at each period are taken from pairs of capacitors, including the measurement and calibration capacitors and the reference and complementary calibration capacitors. A method estimates the liquid level using the sensor in a vehicle.

Abstract: A system for storing an additive and for injecting the additive into exhaust gases of an internal combustion engine. The system includes a tank for storing the additive, an injector and a pump for conveying the additive from the tank to the injector via an injection line, and a purge device configured to force a purge gas to flow through the entire injection line either from the tank to the injector, or from the injector to the tank.

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 two ports are in fluid communication. The valve includes a stationary outer housing including at least three bores; a translating inner section that translates about an axis and includes adequate 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 translating the inner section along its axis. A fuel system vapor management unit includes such a valve.

Abstract: Multilayer plastic fuel tank, comprising a sulphonated part closing off an opening in the wall of the tank. The sulphonated part was manufactured independently of the tank. Process for manufacturing a tank comprising such a sulphonated part by molding a tank wall by blow molding or compression molding, the wall having an opening, and welding the sulphonated part to the wall of the tank surrounding the opening.