Abstract: Method for heating an SCR system using at least two resistive heating elements, according to which each of these resistive elements is powered by a PWM signal, the two PWM signals being at least partly in phase opposition.

Abstract: It is proposed a method for detecting rapidly an absence of a leak in a fuel system mounted on board of a vehicle, the fuel system comprising a pressure sensor adapted to measure pressure comprised within a predetermined working range of pressure. The method is such that it comprises the steps of: a) measuring (S3), by means of the pressure sensor, a pressure in the fuel system at a predetermined time; b) detecting (S4) an absence of a leak when the value of the measured pressure lies outside a range of pressure values which upper and lower limits are set as a function of at least the electronic noise of the vehicle and the predetermined working range of pressure.

Abstract: It is proposed a method for detecting a leak in a fuel system of a combustion engine comprising a fuel tank. The method is such that it comprises the steps of: obtaining a first set of data comprising at least a pressure data measured in the fuel system at a first time; adding energy to fluids contained in the fuel system, said energy being produced or wasted by means already present on board the vehicle for other purposes; obtaining a second set of data comprising at least a pressure data measured in the fuel system at a second time; determining the presence/absence of a leak in said fuel system by calculating a predetermined function on the basis of said first and second sets of data.

Abstract: It is proposed a method for detecting a presence of a leak in a fuel system mounted on board of a vehicle. The method is such that it comprises the steps of: a) obtaining (S1,S6) temperatures and pressures in the fuel system at a first time and at a second later time; b) calculating (S8) a pressure expected in the fuel system at the second time, on the basis of at least one of the temperatures and pressures obtained at the first and second times, and a coefficient that represents the natural evolution of pressure in the fuel system over time; c) detecting (S9) a leak by comparing the calculated expected pressure and the pressure obtained at the second time to at least one predetermined threshold.

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: A valve including a mechanical part, e.g. a float, for performing a ROV function (Roll Over Valve) and an electronic part, e.g. an electronically controlled solenoid valve, for performing a venting function.

Abstract: Safety valve for the venting circuit of a liquid tank Safety valve for the venting circuit of a liquid tank, comprising: a) a chamber (1) provided with a cover (2), which extends at least partly into the tank and is connected via an aperture (4) to the venting circuit; b) a float (7), which can slide vertically inside the chamber (1) and close off the venting aperture (4) in a high position; and c) a moveable wall (3), which divides the chamber (1) into a lower portion (1?) in which the float (7) slides and an upper portion (1?) which connects with the venting circuit, this wall (3) being a moveable wall and having the venting aperture (4), said valve further including an aperture stop (13) integral either with the moveable wall (3) or with the cover (2).

Abstract: A conducting system for a fuel tank filling pipe, including a filling bowl made of a conducting plastic, a filling nozzle guide, also made of a conducting plastic, provided with deformable teeth, and in direct contact with the filling bowl, and a metal head. The bowl and the guide are inserted into the metal head such that the teeth are in permanent radial contact with the metal head when the bowl and the guide are mounted in the filling pipe.