Abstract: During a method for recovering electrical energy, for example during a deceleration phase of a motor vehicle including at least one electric accumulator battery, a low alternator voltage is applied during a first type of vehicle driving phase, and a high alternator voltage higher than the low alternator voltage is applied for a second type of vehicle driving phase. The transition from the low alternator voltage to the high alternator voltage is carried out by applying a first voltage step of a predefined amplitude, followed by a knee in the voltage curve, the voltage curve then continuing into at least a second voltage ramp phase of which the average slope is strictly lower than the voltage ramp of the first step.

Abstract: A method for managing a motor vehicle including a first battery connected to an alternator and an electrical network, the alternator operable either at a positive low alternator voltage or a high alternator voltage higher than the low alternator voltage, the method including: estimating a potential recharging current strength that the first battery could absorb if it was, at that moment, powered by the high alternator voltage; estimating a first alternator yield corresponding to a current rotation speed of the alternator, and to a strength of consumed current actually fed into the network; estimating a second alternator yield corresponding to the current rotation speed of the alternator and to the sum of strengths of a potential recharging current of the battery and of the consumed current; and imposing a high alternator voltage if the difference between the first yield and the second yield is higher than a first threshold.

Abstract: A system supplying electrical power to a vehicle including: a network of electricity consuming units; a first electrical accumulation battery connected to the network, exhibiting a first maximum voltage when unloaded less than a maximum network voltage; a second electrical accumulation battery connected to the network, exhibiting a second maximum voltage when unloaded greater than the maximum voltage when unloaded of the first battery, and a minimum acceptable voltage when unloaded below the maximum network voltage; a drivable alternator connected to the network, configured to deliver to the second battery an electrical energy under a setpoint voltage drivable to various setpoint values; an electronic management facility, configured to impose at least two different setpoint voltages successively on the alternator when the vehicle is running, a low alternator voltage greater than the first maximum voltage, and a high alternator voltage greater both than the minimum voltage and than the low alternator voltage.

Abstract: A method that monitors an electrical battery of a vehicle includes, consecutively, measuring a state-of-charge of the electrical battery at predetermined intervals, comparing the measured values of the state-of-charge of the electrical battery with a first predetermined threshold, and comparing a number of the measured values below the predetermined threshold to a predetermined number, in order to decide whether to replace or recharge the electrical battery, in order to avoid or remedy an immobilization of the vehicle.

Abstract: During a method for recovering electrical energy, for example during a deceleration phase of a motor vehicle including at least one electric accumulator battery, a low alternator voltage is applied during a first type of vehicle driving phase, and a high alternator voltage higher than the low alternator voltage is applied for a second type of vehicle driving phase. The transition from the low alternator voltage to the high alternator voltage is carried out by applying a first voltage step of a predefined amplitude, followed by a knee in the voltage curve, the voltage curve then continuing into at least a second voltage ramp phase of which the average slope is strictly lower than the voltage ramp of the first step.

Abstract: A method for managing a motor vehicle including a first battery connected to an alternator and an electrical network, the alternator operable either at a positive low alternator voltage or a high alternator voltage higher than the low alternator voltage, the method including: estimating a potential recharging current strength that the first battery could absorb if it was, at that moment, powered by the high alternator voltage; estimating a first alternator yield corresponding to a current rotation speed of the alternator, and to a strength of consumed current actually fed into the network; estimating a second alternator yield corresponding to the current rotation speed of the alternator and to the sum of strengths of a potential recharging current of the battery and of the consumed current; and imposing a high alternator voltage if the difference between the first yield and the second yield is higher than a first threshold.

Abstract: A system supplying electrical power to a vehicle including: a network of electricity consuming units; a first electrical accumulation battery connected to the network, exhibiting a first maximum voltage when unloaded less than a maximum network voltage; a second electrical accumulation battery connected to the network, exhibiting a second maximum voltage when unloaded greater than the maximum voltage when unloaded of the first battery, and a minimum acceptable voltage when unloaded below the maximum network voltage; a drivable alternator connected to the network, configured to deliver to the second battery an electrical energy under a setpoint voltage drivable to various setpoint values; an electronic management facility, configured to impose at least two different setpoint voltages successively on the alternator when the vehicle is running, a low alternator voltage greater than the first maximum voltage, and a high alternator voltage greater both than the minimum voltage and than the low alternator voltage.

Abstract: A control process for a fuel pump installed in a fuel circuit of a motor vehicle internal combustion engine. The fuel pump is of the electric drive type and is controlled by the engine control system. The fuel pump is actuated in advance of the operation of the starter for a predetermined time period when the electronic engine control system is switched on. The duration of the predetermined delay time period is adjusted as a function of predetermined criteria such as whether the engine has been previously operated and if a manual signal such as the accelerator pedal to a full throttle position has been given by an operator.

Abstract: The invention relates to a device of verification of the wiring of ignition performance module (2) of an electronic injection-ignition system for an internal combustion engine. It comprises a so-called test line (9) connected between module (2) and computer (1) of injection-ignition. Thanks to this device, a process of verification of the wiring is established having to detect successively the presence of an open circuit or a short circuit between ignition performance module (2) and its control circuit (8).

Abstract: A process and apparatus for controlling the air flow at the intake of a heat engine fed by fuel injection. The air flow is controlled as a function of the rotational speed of the engine, particularly in the vicinity of the rated idling speed. The control point is determined as a result of a filtering made on a value linked to the instantaneous value of the rotational speed of the engine followed by a weighted average between the filtered value and a magnitude linked to the rated idling speed.