Abstract: An electrical power train for a vehicle, the power train comprising an electrical line (61), a fuel cell (3) connected to the electrical line (61), an electrical energy management unit (6) comprising a module controlling the fuel cell, a control device available to the driver of the vehicle for controlling deceleration of the latter, the control device being connected to the management unit, at least one electrical machine (4) connected to at least one driving wheel (40) connected to the electrical line (61) by means of an electronic module controlling the electrical machine, the electrical machine (4) being connected to a second cooling circuit (2) in which a cooling liquid circulates, independent of the first cooling circuit (1), an electrical dissipation element (8), and means for ordering the control module of the fuel battery to stop the process of producing electrical energy while connecting the said dissipation element (8) to the electrical line (61), in the event of a deceleration demand and when the

Abstract: An electric power train for a vehicle, the power train comprising an electrical line (61), an installation for producing electrical energy, the installation being connected to the electrical line (61), the installation having a first cooling circuit (1) using a cooling liquid, an electrical energy management unit (6), at least one electrical machine (4) connected to at least one driving wheel (40), connected to the electrical line (61) by means of an electronic control module for the electrical machine, the electrical machine (4) being connected to a second cooling circuit (2) in which a cooling liquid circulates, independent of the first cooling circuit (1), and an electrical dissipation element (8) being able to be electrically connected to the electrical line, wherein the electrical dissipation element (8) being immersed in the first cooling circuit (1).

Abstract: A vehicle has at least two driving wheels, each driven by an electric motor M via a gear change mechanism having at least two reduction gears. A sensor senses the rotation speed of the driving wheels. The gear change on the two driving wheels is carried out in an initial phase by: (a) releasing the current gear on a driving wheel referred to as the “operated” wheel, and stopping it in the neutral position, (b) changing the revolution speed of the motor so as to synchronize it as a function of the reduction of the gear to be engaged on the operated wheel, using as an estimate of the speed to-be-reached a speed information item obtained from another driving wheel, referred to as the “sensor” wheel, and (c) engaging the intended gear on the “operated” wheel. Then, in a successive phase, the gear on the other driving wheel is changed in the same manner by reversing the roles of the sensor wheel and the operated wheel.

Abstract: Traction chain for an automobile vehicle including a wheel support (K) which supports a rotating hub designed to receive a drive wheel (W), and a rotating toothed wheel having the same rotation axis as that of the drive wheel, the toothed wheel meshing directly with the hub. At least two gear-wheels are permanently engaged with the toothed wheel and are rotated by an input shaft that is driven by an electric motor. A gear ratio change shifter mechanism is shiftable between first and second driving positions and a neutral non-driving position. In the first driving position the shifter mechanism directly connects the input shaft with one of the gear-wheels. In the second driving position the shifter mechanism indirectly connects the input shaft with the other gear-wheel through a transmission path which establishes a gear reduction ratio different from the gear ratio established by the direct connection.

Abstract: A vehicle has an engine driving an alternator. The electrical energy supplied by the alternator feeds an electric traction motor, via a rectifier, an electric line, and an inverter. The electric traction motor is mechanically coupled to a wheel. A super-capacitor is connected to the electric line by a voltage-matching circuit. A unit for controlling the torque applied to the vehicle wheel manages the circulation of the electrical energy in the drivetrain so as always to discharge the super-capacitor as a priority, in order to be able to be ready to recover the energy at the next braking.

Abstract: Traction chain for a series hybrid vehicle comprising an engine (10) which drives an alternator (11), an electric traction motor (21), a inverter which enables the electric traction motor to be operated at a torque set value CCset, an accelerator available for use by the driver of the vehicle, an actuator (15) which acts on the engine, a controller (3) for the traction chain loaded with a model of the engine's operation and loaded with a program which, from the position of the accelerator, allows a pair (Rth/set, PPset) of set values to be obtained for the revolution speed Rth of the engine and for the position of the actuator (15), the said controller making it possible to control the position of the said actuator on the basis of the said set value PPset for the position of the actuator and to calculate a torque set value CCset for the electric traction motor or motors as a function of the deviation between the measured speed Rth and the set value Rth/set for the revolution speed of the engine.

Abstract: An electrical power train for a vehicle, the power train comprising an electrical line (61), a fuel cell (3) connected to the electrical line (61), an electrical energy management unit (6) comprising a module controlling the fuel cell, a control device available to the driver of the vehicle for controlling deceleration of the latter, the control device being connected to the management unit, at least one electrical machine (4) connected to at least one driving wheel (40) connected to the electrical line (61) by means of an electronic module controlling the electrical machine, the electrical machine (4) being connected to a second cooling circuit (2) in which a cooling liquid circulates, independent of the first cooling circuit (1), an electrical dissipation element (8), and means for ordering the control module of the fuel battery to stop the process of producing electrical energy while connecting the said dissipation element (8) to the electrical line (61), in the event of a deceleration demand and when the

Abstract: An electric power train for a vehicle, the power train comprising an electrical line (61), an installation for producing electrical energy, the installation being connected to the electrical line (61), the installation having a first cooling circuit (1) using a cooling liquid, an electrical energy management unit (6), at least one electrical machine (4) connected to at least one driving wheel (40), connected to the electrical line (61) by means of an electronic control module for the electrical machine, the electrical machine (4) being connected to a second cooling circuit (2) in which a cooling liquid circulates, independent of the first cooling circuit (1), and an electrical dissipation element (8) being able to be electrically connected to the electrical line, wherein the electrical dissipation element (8) being immersed in the first cooling circuit (1).

Abstract: The invention proposes a method of controlling the gear change for a vehicle having at least two driving wheels, each driven by an electric motor M via a gear change mechanism having at least two reduction gears, a sensor for sensing the rotation speed of the driving wheel, in which the gear change on the two driving wheels is carried out in accordance with the following sequence: in an initial phase, releasing the current gear on a wheel referred to as the “operated” wheel RM, and stopping it in the neutral position, changing the revolution speed of the motor so as to synchronize it as a function of the reduction of the gear to be engaged on the operated wheel RM, using as an estimate of the speed of the vehicle a speed information item that is obtained from another driving wheel, referred to as the “sensor” wheel RC, engaging the intended gear on said “operated” wheel RM, then, in a successive phase, changing the gear on said other driving wheel with reversal of the roles of sensor wheel RC and operated whe

Abstract: A steering system for a vehicle includes a steerable wheel 1 capable of being steered, a steering wheel 20, and an electrical actuator 3 for altering the steering angle of the steerable wheel. The electrical actuator 3 has three electric motors 31, 32, 33 which act in parallel and three controllers 61, 62, 63 which operate in parallel, each forming part of an electrical control channel for the steering angle. The controller of each electrical channel receives one of the three electrical signals in the control channels and is connected to one of the position sensors and drives one of the electric motors in order to set the said steering angle. The torques delivered by the respective motors are added together in normal operation.

Abstract: Traction chain for a series hybrid vehicle comprising an engine (10) which drives an alternator (11), an electric traction motor (21), a inverter which enables the electric traction motor to be operated at a torque set value CCset, an accelerator available for use by the driver of the vehicle, an actuator (15) which acts on the engine, a controller (3) for the traction chain loaded with a model of the engine's operation and loaded with a program which, from the position of the accelerator, allows a pair (Rth/set, PPset) of set values to be obtained for the revolution speed Rth of the engine and for the position of the actuator (15), the said controller making it possible to control the position of the said actuator on the basis of the said set value PPset for the position of the actuator and to calculate a torque set value CCset for the electric traction motor or motors as a function of the deviation between the measured speed Rth and the set value Rth/set for the revolution speed of the engine.

Abstract: Traction chain for an automobile vehicle, comprising a wheel support (K) which supports a rotating hub designed to receive a drive wheel (W) and which realizes a rotation axis for the said drive wheel, a rotating toothed wheel (3) having the same rotation axis as that of the said drive wheel, the toothed wheel meshing directly with the hub, an arrangement comprising at least two gear-wheels permanently engaged with the said toothed wheel, comprising an electric motor (M), and comprising a gear ratio change mechanism with a neutral position between ratios, controlled by a fork which is itself controlled by a motorized reduction unit 12. The mechanism comprises a direct mesh between the input shaft and one of the gear wheels, and comprises at least one other mechanical transmission path with a different reduction ratio from the direct mesh between the input shaft and the other gear-wheel.

Abstract: A vehicle suspension device having, for each suspension system, a suspension including a spring and a reversible electric actuator acting in parallel with the spring. The device includes provision for controlling the electric actuators of each of the suspension systems so that they each develop a force having two components: a damping component opposing the deflection speed and a trim correction component, the said trim correction components applying a trim correction torque to the suspended mass.

Abstract: A steering system for a vehicle includes a steerable wheel 1 capable of being steered, a steering wheel 20, and an electrical actuator 3 for altering the steering angle of the steerable wheel. The electrical actuator 3 has three electric motors 31, 32, 33 which act in parallel and three controllers 61, 62, 63 which operate in parallel, each forming part of an electrical control channel for the steering angle. The controller of each electrical channel receives one of the three electrical signals in the control channels and is connected to one of the position sensors and drives one of the electric motors in order to set the said steering angle. The torques delivered by the respective motors are added together in normal operation.

Abstract: A vehicle has an engine driving an alternator. The electrical energy supplied by the alternator feeds an electric traction motor, via a rectifier, an electric line, and an inverter. The electric traction motor is mechanically coupled to a wheel. A super-capacitor is connected to the electric line by means of a voltage-matching circuit. A unit for controlling the torque applied to the vehicle wheel manages the circulation of the electrical energy in the drivetrain so as always to discharge the super-capacitor as a priority, in order to be able to be ready to recover the energy at the next braking.

Abstract: A rotor for an electric machine which rotor includes a multi-faced shaft, a plurality of pole pieces and permanent magnets carried by the shaft and a plurality of the rods extending between a pair of lateral flanges and passing through the pole pieces between the flanges to retain the pole pieces on the shaft, the pole pieces retaining the magnets on faces of the shaft.

Abstract: A vehicle suspension device having, for each suspension system, a suspension including a spring and a reversible electric actuator acting in parallel with the spring. The device includes provision for controlling the electric actuators of each of the suspension systems so that they each develop a force having two components: a damping component opposing the deflection speed and a trim correction component, the said trim correction components applying a trim correction torque to the suspended mass.

Abstract: A rotor for an electric machine which rotor includes a multi-faced shaft, a plurality of pole pieces and permanent magnets carried by the shaft and a plurality of the rods extending between a pair of lateral flanges and passing through the pole pieces between the flanges to retain the pole pieces on the shaft, the pole pieces retaining the magnets on faces of the shaft.

Abstract: The suspension device controls the range of movement between a suspended point connected to the body 3 of a vehicle and a non-suspended point connected to a wheel 2 which includes an elastic link 1 mounted between said suspended and non-suspended points, the elastic link being essentially composed of a spring of stiffness K and predetermined length under a reference load and a reversible electric jack 5 acting parallel to the spring 4 in order to control the movements between said suspended and non-suspended points.