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: Process for starting an SCR system intended for transporting urea from a tank to the exhaust gases of an engine using a feed line, this system comprising a rotary pump controlled by a controller and driven by a brushless direct current (BLDC) motor that comprises a rotor equipped with at least one permanent magnet and with a stator comprising at least 3 electromagnetic coils in which the direct current can flow according to a given sequence to make the rotor rotate, according to which, before starting the pump, a temperature is measured using a sensor and if this temperature is below a setpoint temperature, before making the rotor rotate, the current is passed through at least one of the coils in a way such that it preheats the pump without making the rotor rotate.

Abstract: Process for heating a urea component of a SCR system comprising besides said component, a temperature sensor, a heating device in the component, according to which: 1. the temperature (Tcpt) of the liquid in the component is determined and compared to a 1st setpoint (T0); 2. if the temperature (Tcpt) is greater than the 1st setpoint (T0), step 1 is repeated; 3. if the temperature (Tcpt) is less than or equal to the 1st setpoint (T0), the heating device is actuated, 4. the time during which the heating device is actuated is measured and the heating device is stopped if this time is greater than a time t1; 5. the temperature (Tcpt) is determined after a time t2 and compared to a 2nd setpoint (T1 with T1>T0); if the temperature (Tcpt) is less than or equal to the 2nd setpoint (T1) the heating device is actuated and step 4 is repeated; 6. if the temperature (Tcpt) is greater than the 2nd septoint (T1), the heating device is stopped and step 1 is repeated.

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 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: Urea tank and base plate with an integrated heating element in which the heating element comprises at least one flexible part which is preferably a flexible heater comprising at least one resistive track affixed to one flexible film and/or placed between two flexible films.

Abstract: A 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.

Abstract: Method for heating a urea SCR system using at least two resistive heating elements (R1, R2), one of which (R1) is intended for heating one or some (part(s) of) component(s) always in contact with a substantial amount of urea and the other (R2) is intended for heating one or some (part(s) of) component(s) which are sometimes not in contact with a substantial amount of urea, and according to which, when starting the system in freezing conditions, the resistive element R1 is activated but the resistive element R2 is activated only when its component is actually in contact with a substantial amount of urea.

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 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 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: 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.

Abstract: System for closing off an opening in a plastic tank, formed from a sheet of multilayer plastic that includes a barrier layer, the said sheet being welded around the perimeter of the opening and provided with a peripheral region that is slimmed down so as to effectively restrict the permeation of gases and liquids into the layer located between the tank and the barrier layer. Method of closing of a tank by welding such a plate, comprising the welding of the slimmed-down peripheral part by the technique of laser or infrared radiation welding. Use of the method to close off a fuel tank for a motor vehicle.

Abstract: Process for manufacturing hollow plastic bodies, especially motor-vehicle fuel tanks, from an extruded parison of closed cross section, in which at least one cut is made in the parison which is then formed by moulding.

Abstract: Injection-moulded plastic flange for mounting accessories, in order to close off an opening in a hollow thermoplastic body, which flange has a thread on its periphery. Process for manufacturing a fuel tank comprising such a threaded flange on which at least one accessory is mounted by placing a compressible seal around the periphery of the flange, by making the flange and the seal bear on the perimeter of the opening in a shell, by screwing a ring onto the thread of the flange and by welding the shell to at least one other shell in order to obtain a tank.

Abstract: Process for manufacturing hollow plastic bodies, especially motor-vehicle fuel tanks, from an extruded parison of closed cross section, in which at least one cut is made in the parison which is then formed by moulding.

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.

Abstract: Process for manufacturing hollow plastic bodies, especially motor-vehicle fuel tanks, from an extruded parison of closed cross section, in which at least one cut is made in the parison which is then formed by molding.

Abstract: System and for sealing an opening of a plastic tank with a multilayer wall by means of a multilayer plate itself constituted by a polymer structure including at least one internal barrier layer and an exterior layer compatible with the exterior layer of the tank wall. The multilayer plate is welded over an opening in the tank and the plate and the wall of the tank are superimposed so that the number of superimposed layers is equal to the sum of the number of layers in the plate and the number of layers in the wall of the tank.