Abstract: Method for detecting defects in a plastic vehicle tank equipped with internal accessories located inside the tank. The method comprises at least the following steps: a) providing the tank equipped with said internal accessories; b) making a digitized X-ray image of said tank; c) providing a reference image of said tank; d) comparing the digitized X-ray image and the reference image by means of a computer vision software; e) deciding on the presence of defects when differences exist between the digitized X-ray image and the reference image.

Abstract: Method for fastening an accessory to a wall of a plastic fuel tank, this fastening taking place by snap-riveting using a tool at the same time as the tank is manufactured by moulding, the accessory being, for this purpose, provided at at least one of its fastening points with an orifice through which the snap-riveting is carried out. According to the invention, a concave relief at least partially surrounds this orifice, the relief having a size and shape suitable for being able to cooperate with an excrescence of the tool during the snap-riveting.

Abstract: System for storing an additive solution and injecting it into the exhaust gases of an engine, said system comprising two tanks for storing the solution and one pump for supplying the solution from these tanks to an injection line, these two tanks being in parallel and each being connected to the pump by a branch of a supply line, the branch (I) coming from the first tank (1) giving rise to lower pressure drops than the branch (II) coming from the other tank (2) so that the solution is normally withdrawn mainly from tank (1) and is withdrawn from tank (2), and only from the latter, when tank (1) is non-operational.

Abstract: Article based on an elastomeric composition (C) comprising a crosslinked blend (B) of at least: (1) one substantially saturated synthetic elastomer; and (2) a copolymer containing repeating units derived from at least one conjugated diene and at least one ?,?-unsaturated nitrile, the article having been subjected to a surface halogenation treatment.

Abstract: Method for mounting a capacitive level sensor inside a liquid tank having a bottom wall, the sensor having a foot and a measuring portion comprising at least one capacitive element supported by a rigid support extending from said foot, wherein the foot is fixedly secured to the bottom wall of the tank through a retainer, and according to which the rigid support forms an angle with the foot so that the length of the measuring portion of the sensor is higher than the height of the tank in the portion where the foot is located.

Abstract: Supply system for a liquid comprising a liquid tank, a supply line, a pump, a filter and a device that makes it possible to purge the line, pump and filter and that comprises a non-return device preventing liquid from entering into these elements once they have been purged. In this system, the pump, filter and non-return device are combined in a compact module, the filter at least partly surrounding the pump and the non-return device being an integral part of a common housing that surrounds the filter and at least one part of the pump.

Abstract: Process for starting a pump intended to pump a liquid contained in a tank and to produce a substantially constant outlet pressure (setpoint pressure), according to which: 1/ the temperature (T1) of the liquid held in the tank is determined and compared to a setpoint temperature (T0); 2/ if the temperature (T1) is greater than the setpoint temperature (T0), the pump is actuated; 3/ if the temperature (T1) is less than or equal to the setpoint temperature (T0), the tank is heated for a time t1; then 4/ the pump is actuated for a time t2 during which the pump outlet pressure is measured; 5/ if this pressure is stable and in an acceptable margin of the setpoint pressure, the pump is kept going; and 6/ if this pressure is not stable and/or is not in the acceptable margin of the setpoint pressure, the pump is stopped and the tank is heated for a time t3, at the end of which steps 4 to 6 are repeated.

Abstract: An assembly of two components configured to be in contact with hydrocarbons, and a fuel tank including the assembly. The assembly includes a casing or a retaining member fastened to the casing, each of the two components including at least one fastening part configured to interact, and at least one of the components being made from a material configured to swell through action of the hydrocarbons, thus reinforcing retention of the components on one another. A method for manufacturing such a tank includes assembling the two components in the absence of fuel, and then bringing the two components into contact with the fuel.

Abstract: Process for manufacturing a fuel tank equipped with an internal accessory and having a plastic wall produced from a parison, said process comprising, in order, the following steps: a) the accessory (2) and the molten parison (5) are introduced a mould (1) so that the accessory (2) is surrounded by the parison (5), said mould comprising cavities (1) equipped with at least one moving part (4); b) a pressurized gas is introduced inside the parison (5) to carry out a pre-blow moulding of said parison; c) the pre-blow-moulded parison (5) is pressed locally against the accessory (2) using the moving part (4) in order to firmly attach the two without piercing the parison (5); d) the mould (1) is closed and the final blow moulding of the parison (5) is carried out by flattening it against the mould (1) cavities using the pressurized gas; and e) the tank is removed from the mould (1).

Abstract: Method for simulating the ventilation of a liquid tank (1,101), in particular a liquid fuel tank of a vehicle, comprising an internal volume (3,103), a wall (2,102) that defines said internal volume (3,103), and a set of valves (4a,4b;104) for ventilation of the internal volume, said method comprising the calculation of a maximum liquid volume that can be ventilated (14,114) for a maximum angle of inclination of the tank (1,101).Such method also comprises the calculation of at least one maximum liquid volume that can be ventilated (14,114) for at least one intermediate angle of inclination below said maximum angle, but above zero.

Abstract: Method for simulating the gauging of a hollow body intended to contain a liquid and that comprises the following steps: for several different partial filling volumes of said hollow body, calculating the centre of mass of the corresponding free liquid surface; and generating a gauging curve that passes substantially through each of said centres of mass.

Abstract: Method for controlling the operation of a pump driven by an electric motor and controlled by a controller, according to which an electronic control module (ECM) sends, to the controller, a PWM (Pulse Width Modulation) control signal having a duty cycle that varies as a function of the desired operating conditions for the pump and according to which the controller acts on the electric motor to apply said operating conditions to the pump.

Abstract: Method for detecting a cap off situation on the fuel tank of a combustion engine vehicle having a fill pipe head located under a fuel fill door, according to which a cap off test is run when the engine is started again after having been switched off and when a door switch indicates that the fuel fill door has been opened.

Abstract: Liquid tank venting system comprising a chamber that is inside the tank and that is equipped with a drainage device that comprises at least one opening made in the chamber and an elastomer-based non-return valve capable of sealing/freeing this opening, according to which this non-return valve is forced into a position for leaktight closure of the opening via a specific device starting from a certain liquid level in the tank.

Abstract: A locking system for locking a stopper incorporated into the top of a fuel tank filler pipe, the stopper allowing the pipe to be opened automatically via action of a fuel dispensing nozzle. The stopper is retractable under action of a thrust directed against the stopper along an axis parallel to the axis of the top of the pipe, and is secured to a return spring that keeps the stopper in the closed position. The system includes a rotary ring configured to prevent movement of the stopper via a bayonet system, and rotary movement of which is brought about using a key.

Abstract: A device for plugging a top of a fuel tank filler pipe situated under a fuel filler flap, movement of which is controlled by an actuator. The device includes a stopper secured to the fuel filler flap and configured to plug the top of the pipe and a locking mechanism for locking the stopper.

Abstract: System for storing an additive solution and injecting it into the exhaust gases of an internal combustion engine, the system comprising a tank for storing the additive and a rotary pump, a metering valve and an injector which are separate devices, this system making it possible to meter and inject the additive solution into the exhaust gases as is, without diluting it with a gas. In this system, the pump outlet pressure is regulated by adjusting the rotational speed of the pump. Process using such a system.

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: Method for the determination of the volatility of a fuel stored in a fuel tank which is part of a fuel system controlled by a fuel system control unit (FSCU) and comprising pressure, temperature and fuel level sensors, according to which the FSCU uses the ideal gas law and measurements performed by the sensors in order to predict the distillation curve and/or the Driveability Index (DI) of the fuel; use of said method for adjusting the amount of fuel to be injected in a mixing chamber of an internal combustion engine of a motor vehicle.

Abstract: In a fuel tank and a process for manufacturing the fuel tank, accessories emerging through the wall of the tank are covered by a flexible film of multilayer structure that includes a fuel barrier layer. The perimeter of the film is welded to the wall of the tank.