Abstract: The invention relates to an electric power supply system for an item of electrical equipment, which comprises: a DC power supply bus, a first battery (BATT1) and a second battery (BATT2) which are connected in parallel and each able to deliver a first DC voltage on said DC power supply bus, an auxiliary battery (B_AUX) configured to deliver a second DC voltage (U_AUX), a control unit (UC) configured to: select at least one battery from among the first battery and the second battery in order to set said voltage on the DC power supply bus by connecting it to the DC power supply bus, order the unselected battery to be connected to the DC power supply bus, and said auxiliary battery (B_AUX) to be charged by placing it in series with the unselected battery and by switching the cells of said unselected battery in order to control a charge current (I_aux) for said auxiliary battery.

Abstract: Disclosed is a method for controlling a DC current converter present in an on-board network of a motor vehicle including a service battery, the on-board network being connected, via the converter, to a traction battery that supplies power to a traction network with inverter and electric machine. When a transmission of power transients from the on-board network to the traction network leading to instabilities in the traction network is detected, an auxiliary mode of control of the converter is implemented with a limit on the current output from the converter depending on a state of charge of the service battery, the current limit increasing as the charge of the service battery decreases.

Abstract: A method for synchronizing an internal combustion engine having at least one cylinder including a piston moving between a top and a bottom dead center, the movement driving a crank shaft and a cam shaft, the method including: determining as many plausible hypotheses as there are reference teeth present on the target attached to the crank shaft in two crank shaft revolutions, detecting the passing of reference edges of a target attached to the crank shaft and of rising or falling edges of a target attached to the cam shaft, using the positioning of detected edges to eliminate one or more hypotheses made for the position of the top dead center of the cylinder at start up, by comparing the positioning of detected edges with a positioning of the edges corresponding to the determined hypotheses, and terminating synchronization when all hypotheses except one have been eliminated.

Abstract: A method an device for determining information representative of the position of a real tooth of a toothed target rigidly attached in rotation to a shaft of an internal combustion engine, the toothed target including n real teeth and m missing teeth forming a reference area and the engine being equipped with a sensor for detecting the passage of the real teeth of the toothed target in front of the sensor and with a unit capable of measuring, for each tooth k, the period of time, called period (T(k)) of the tooth k, separating the tooth k from the preceding tooth k?1. For the tooth k, the following ratio is calculated: R ? ? ( k ) = [ ( T ? ( k - N 2 ) ) N ? i N 2 + 1 ? ? … ? ? N ? ? T ? ( k - i ) × ? i 0 ? ? … ? ? N 2 - 1 ? ? T ? ( k - i ) ] where N is an even integer greater than or equal to 2.