Abstract:
Fuel tank or filler pipe for this tank comprising a multilayer wall constituted at least of one layer based on a reinforced thermoplastic composition and of one inner layer, intended to be in contact with the fuel, based on a non-reinforced thermoplastic composition. Use of such a tank/pipe in a hybrid vehicle.
Abstract:
Plastic fuel tank comprising a wall, a gauge, a swirl pot comprising a flexible portion, a gauge stand comprising a housing and a support bearing the gauge and equipped with 2 ends, the swirl pot and the gauge being fastened to the tank wall and the gauge support being positioned so that one end of the support cooperates with the housing of the gauge stand and that the other end is in forced contact with the flexible portion of the swirl pot.
Abstract:
Process for manufacturing a plastic fuel tank equipped with a component, by moulding a parison (16) using a mould (14) comprising two cavities and a core, said process comprising the mounting of a component (18) around a needle or an oblong object (12) attached to the core/ the displacement of the needle or oblong object so as to deform the parison and pierce an opening into it, the needle or oblong object carrying the component with it in order to position the component in the opening, and the withdrawal of the needle/oblong object, leaving the component lodged in the opening.
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 the 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rise to lower pressure drops than the branch (II) coming from the other tank (2) so that the solution is normally withdrawn mainly from tank (1) and is withdrawn from tank (2), and only from the latter, when tank (1) is non-operational.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:
Plastic fuel tank, or accessory for such a tank, characterized in that it comprises a layer based on high-density polyethylene (HDPE), dispersed in which is a barrier polymer so as to constitute a multiphase material having a morphology that is structured on a nanoscopic scale.
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:
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 tl; 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; 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:
Method for metering an aqueous ammonia precursor solution stored in a ventilated and/or pressure-calibrated tank (1) into the exhaust gases (9) of an internal combustion engine, said method consisting in determining the precursor concentration of the solution based on a measurement of the temperature of the solution in the tank and on nomograms obtained by ageing of reference solutions and establishing, for various temperatures, the change in the precursor concentration as a function of the calibration pressure of the tank.
Abstract:
Method for metering an aqueous ammonia precursor solution into the exhaust gases of an internal combustion engine and consisting in determining the total amount of ammonia available in the solution in the form of precursor, ammonia and ammonium hydroxide and in calculating the volume of the solution to inject as a function of this amount.
Abstract:
Urea feed or return line (2) that comprises a hollow coupling (1) enabling it to be connected to a urea tank and that comprises a passage for the urea, this coupling being, in addition, equipped with a heating filament (9), at least one part of which extends freely inside the passage provided for the urea, this part having the shape of a loop or a spiral capable of also extending at least partly into the tank and/or into a tube attached thereto.