Abstract: A method for manufacturing a plastic fuel tank including: a) inserting a plastic parison including two distinct parts into an open two-cavity mold; b) inserting a core, bearing at least part of a reinforcing element configured to create a link between the two parison parts, inside the parison; c) pressing the parison firmly against the mold cavities, for example by blowing through the core and/or creating suction behind the cavities; d) fixing the part of the reinforcing element to at least one of the parison parts using the core; e) withdrawing the core; f) closing the mold, bringing its two cavities together to grip the two parison parts around their periphery to weld them together; g) injecting a pressurized fluid into the mold and/or creating a vacuum behind the mold cavities to press the parison firmly against the mold cavities; and h) opening the mold and extracting the tank.

Abstract: The invention relates to a capacitive sensor (2) for detecting the level (52) of a liquid (54) in a tank (48). The inventive sensor consists of: a flat longitudinal support (4) comprising proximal (8), central (10) and distal (12) parts and connection means (6) which are located in the proximal part (8) and which are used to connect the support (4) and the exterior of the support (4) electrically; a measuring pair (14) comprising interdigital arms which are disposed on the support (4) at least in the central part (10) thereof; and a reference pair (16) comprising interdigital arms which are disposed on the support (4) in the distal part (12) thereof. The aforementioned support (4) comprises at least three layers, and the reference pair (16) is linked to at least one connection track (26) which is located in an inner layer (24) of the support (4) and which is linked to the above-mentioned connection means (6). The invention also relates to a tank (48) comprising one such sensor (2).

Abstract: 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 comprises at least two hollow components each based on a different plastic, the said components being mechanically attached to each other and in communication with each other and include, between them, an overmoulded seal.

Abstract: A method for connecting a tubular part made of plastic to a neck of a fuel tank also made of plastic, by welding using a resistive element heated by a resistive effect. The shape and dimensions of the two parts to be connected are chosen such that one surface of each part is up against a corresponding surface of the other part. The resistive element is incorporated into one of the two surfaces, the two surfaces are brought into contact, and an electric current is passed through the resistive element at an intensity to allow the resistive element to be heated to a temperature high enough to melt the plastic of the two surfaces to weld them together. The tubular part and neck each include a barrier layer and are welded such that the two contact surfaces are coaxial and the barrier layers in the weld region are parallel.

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 process for producing, by molding. a hollow plastic body with a multilayer structure including a liquid barrier layer. In the process: a) a parison including at least one part to be welded is inserted into an open mold including at least two impressions provided with a weld zone to position the part to be welded in the weld zone; b) the mold is closed, juxtaposing its impressions to clamp that part of the parison to be welded and to carry out welding; c) a pressurized fluid is injected into the mold and/or a vacuum is pulled behind the mold impressions to press the parison against the mold impressions and to mold the hollow body; and d) the mold is opened and the hollow body extracted During a) to d), the mold impressions are cooled, exception at the weld zone, which is heated at least during a) and b).

Abstract: A method for manufacturing a plastic fuel tank including: a) inserting a plastic parison including two distinct parts into an open two-cavity mold; b) inserting a core, bearing at least part of a reinforcing element configured to create a link between the two parison parts, inside the parison; c) pressing the parison firmly against the mold cavities, for example by blowing through the core and/or creating suction behind the cavities; d) fixing the part of the reinforcing element to at least one of the parison parts using the core; e) withdrawing the core; f) closing the mold, bringing its two cavities together to grip the two parison parts around their periphery to weld them together; g) injecting a pressurized fluid into the mold and/or creating a vacuum behind the mold cavities to press the parison firmly against the mold cavities; and h) opening the mold and extracting the tank.

Abstract: A method for fixing a fuel level sensor in a fuel tank having an upper and a lower wall, the sensor having a foot and a top. The method fixedly secures the foot of the sensor to the bottom wall of the fuel tank through a molded-in retainer, and elastically fixes the tubular top of the sensor to the top wall the tank through a molded-in retainer as well.

Abstract: A method for manufacturing a plastic fuel tank including a built-in neck, by molding a parison in a mold. The neck is molded by locally deforming the parison using a concave counter-form and a convex form configured to enter the counter-form, these two parts being secured one of them to the mold and the other to a core located inside the mold, or vice versa.

Abstract: A refueling system for a vehicle having a combustion engine. The refueling system includes: a fuel tank; a canister configured to adsorb fuel vapor generated inside the fuel tank; a canister drain cut valve coupled to the canister and configured to discharge air; an ignition sensor configured to detect whether the ignition of the combustion engine is switched on or off; and a refueling controller configured to open the canister drain cut valve when the ignition sensor detects that the ignition of the combustion engine is switched off. A method for refueling a motor vehicle can use the refueling system.

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

Abstract: Sealing system for fuel tank fill head comprising: a valve that can be moved between an open position, in which fuel may be introduced into a fill pipe, and a closed position in which the fill pipe is closed, the valve passing from one position to the other under the effect of a pressure exerted by a filling nozzle head; a locking system capable of locking the valve in its closed position; and an actuation system capable of being moved between a closed position and an open position under the effect of introducing the filling nozzle into the fill head. The locking system and the actuation system are capable of cooperating together so that a displacement of the actuation system from its closed position to its open position causes a displacement of the locking system from a locked position to an unlocked position. The actuation system comprises a rotatable cam equipped with a coupling pin capable of cooperating with the locking system.

Abstract: Method for manufacturing a plastic fuel tank by moulding a parison in which, during the moulding operation, a pipe (3) is attached to the parison at least two points, the said pipe being deformable.

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: Fuel reservoir having a bottom (5) and a valve integrally molded with said bottom and comprising:—a disk or flap (1) having a hole (2) in it;—at least one post (3) that fits through the hole (2) in the disk and which is integrally molded with the reservoir's bottom (5); and—at least one hole (4) through the reservoir's bottom (5) which is positioned close to the post (3) and in a way such that the disk (1) covers it when positioned in its relief position.

Abstract: Fuel system comprising a fuel tank, a main fuel supply pump (2), a fuel filter (4) comprising a housing and a filter element, a reservoir (10) within the fuel tank and a jet pump (3) for filling said reservoir, wherein a one piece connector (1) directly connects the main fuel supply pump (2), the fuel filter (4) and the jet pump (3).

Abstract: Sealing system for fuel tank fill head comprising: a shutter that can be moved between an open position, in which fuel may be introduced into the fill pipe, and a closed position in which the fill pipe is closed, the shutter passing from one position to the other under the effect of a thrust exerted by a filling nozzle head; a shield placed upstream of the shutter and that can be moved between an open position, in which the shutter is accessible, and a closed position in which the shutter is protected from the atmosphere by the shield; and a nozzle inhibitor comprising components that can be rotated with respect to an axis of rotation substantially parallel to the longitudinal axis of the fill head and designed so as to enable a movement of the shutter from its closed position to its open position when the mobile components have been moved under the effect of a thrust exerted by the filling nozzle head having a predefined diameter on the mobile components.

Abstract: Fuel tank comprising a reservoir and a fuel pump sucking fuel out of said reservoir, wherein said reservoir has a low profile and wherein the fuel pump is mounted horizontally or inclined into or onto said low profile reservoir.

Abstract: Method for stake-fastening an accessory (4) into a plastic fuel tank, whereby:—the accessory (4) is equipped with at least one orifice (5) which passes right through the accessory (4); —at least some of the plastic of which the wall of the tank (1) is made is melted; and—some of the molten plastic is forced through the orifice (5) of the accessory without becoming detached from the remainder of the molten plastic; —the protruding molten plastic is given an appropriate shape (8) to obtain a self-formed plastic rivet, and is left to solidify; the size and shape of the orifice (5) and/or of the solidified plastic (8) being such that the accessory (4) is mechanically fastened to the tank by at least some of the solidified plastic (8), the stake-fastening of the accessory (4) occurring at the time of manufacture of the tank (1) through the moulding of a split or at least two-part parison.