Abstract: A method for controlling an electric drive system for an electric vehicle, the electric drive system being subdivided in an electric machine subsystem having a first electric machine and a second electric machine and in a remaining subsystem having at least an electric storage device. The method includes: determining an allowable remaining system power range for the remaining system; determining an allowable first machine power range for the first electric machine and an allowable second machine power range for the second electric machine; and determining an allowable first machine torque range. The method also includes: determining an allowable second machine torque range; determining a first machine torque setpoint for the first electric machine and determining a second machine torque setpoint for the second electric machine; and operating first electric machine to realize first machine torque setpoint and operating second electric machine to realize second machine torque setpoint.

Abstract: A method for controlling the activation of an electric machine in voltage control mode for an electrical network of a motor vehicle following a failure of a traction battery present in a traction network of the vehicle. The traction network includes the traction battery, the electric machine, an inverter and a DC-to-DC converter connecting the traction battery to an onboard network of said motor vehicle. The method includes a step of precharging capacitors present in the electrical network and a step of activating the electric machine in voltage control mode for the electrical network. The activation of the electric machine in voltage control mode is activated before the deactivation of precharging.

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: 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: Disclosed is a method for managing the starting of a combustion engine of a hybrid drive system including a combustion engine and an electric machine, as well as a drive shaft, the electric machine producing torque to start the combustion engine and drive the drive shaft at least during an initial phase of the start. In a transient starting phase, the combustion engine drives the drive shaft and the electric machine is stopped. The electric machine is regulated, during the initial phase and transient phases, with a first engine speed setpoint. The transient phase begins when the drive shaft reaches the first engine speed setpoint and remains steady. Torque control produced by the electric machine during the transient starting phase being configured so that the electric machine is stopped as soon as the control determines that the torque produced by the electric machine is tending toward zero torque.

Abstract: Disclosed is a method for managing the starting of a combustion engine of a hybrid drive system including a combustion engine and an electric machine, as well as a drive shaft, the electric machine producing torque to start the combustion engine and drive the drive shaft at least during an initial phase of the start. In a transient starting phase, the combustion engine drives the drive shaft and the electric machine is stopped. The electric machine is regulated, during the initial phase and transient phases, with a first engine speed setpoint. The transient phase begins when the drive shaft reaches the first engine speed setpoint and remains steady. Torque control produced by the electric machine during the transient starting phase being configured so that the electric machine is stopped as soon as the control determines that the torque produced by the electric machine is tending toward zero torque.

Abstract: A method for assistance in starting a heat engine of a motor vehicle including an auxiliary network supplied by a low-voltage auxiliary battery and by a voltage-controlled DC current source. This method is launched in the first place when the electronic control system of the vehicle is woken up as a result of a specific action performed by a user, which may be followed by an action of starting the heat engine. This method also consists in controlling the current source so as to cause it to operate at its maximum power during a time interval adapted to reach a maximum positive polarization of the auxiliary battery, and then, at the end of this time interval, in the absence of an effective starting command, controlling the current source so as to cancel the current flowing in the auxiliary battery.

Abstract: The present disclosure teaches a control unit for the exchange of electrical power between a first, a second, a third, and a fourth wiring system branch of a wiring system of a vehicle. The control unit may include a first switching device, a second switching device, a third switching device, and a first, second, third, and fourth terminal configured for connection to the first, second, third and fourth wiring system branches respectively. The first switching device may be connected between the first terminal and the fourth terminal. The second switching device may be connected between the fourth terminal and the third terminal. The third switching device may be connected between the second terminal and the third terminal.

Abstract: A method prevents the stalling of the engine of a hybrid vehicle (1) equipped with an auxiliary motor (4) and wheels (R1 to R4), pistons (2a to 2d), tank (3), axle (5), drive shaft (6), gearbox (7), connections (8a, 8b), and computer (9). The method uses an estimate of the predicted instantaneous speed of the main engine (2) at its next top dead center, for the purpose of assisting the main engine in a stall situation, via the auxiliary motor which can supply sufficient power to it on a one-off basis to prevent it from stopping. The method defines two levels of instantaneous speed. If the predicted instantaneous speed is located in the intervention zone between the two levels, the auxiliary motor assists the rotation of the main engine to enable it to rotate in the same direction, without stalling.

Abstract: Disclosed is a method for assistance in starting a heat engine of a motor vehicle including an auxiliary network supplied by a low-voltage auxiliary battery and by a voltage-controlled DC current source. This method is launched in the first place when the electronic control system of the vehicle is woken up as a result of a specific action performed by a user, which may be followed by an action of starting the heat engine. This method also consists in controlling the current source so as to cause it to operate at its maximum power during a time interval adapted to reach a maximum positive polarization of the auxiliary battery, and then, at the end of this time interval, in the absence of an effective starting command, controlling the current source so as to cancel the current flowing in the auxiliary battery.

Abstract: A method for establishing a functional diagnosis for a buck static DC-DC voltage converter in an electric or hybrid vehicle including a power supply circuit including at least a first and a second electrical voltage source supplying respectively a primary and a secondary circuit with direct current, the first source having a voltage value greater than the second source, the primary and secondary circuits being connected by the voltage converter which itself is commanded by control and safety elements, includes the following sequential steps: deactivating any power consumer on the primary circuit or waiting for any power consumer on the primary circuit to be inactive, commanding from the converter an output voltage greater than the voltage of the second electrical voltage source, determining if there is a power transfer from the primary to the secondary circuit, and: if not, establishing a faulty functionality diagnosis for the converter.

Abstract: The present disclosure teaches a control unit for the exchange of electrical power between a first, a second, a third, and a fourth wiring system branch of a wiring system of a vehicle. The control unit may include a first switching device, a second switching device, a third switching device, and a first, second, third, and fourth terminal configured for connection to the first, second, third and fourth wiring system branches respectively. The first switching device may be connected between the first terminal and the fourth terminal. The second switching device may be connected between the fourth terminal and the third terminal. The third switching device may be connected between the second terminal and the third terminal.

Abstract: A method for preventing the stalling of the engine of a hybrid vehicle (1) equipped with an auxiliary motor (4), generally an electric motor, and with related equipment, namely wheels (R1 to R4), pistons (2a to 2d), tank (3), axle (5), drive shaft (6), gearbox (7), connections (8a, 8b), and computer (9). The method uses an estimate of the predicted instantaneous speed of the main engine (2) at its next top dead center, for the purpose of assisting the main engine in a stall situation, via the auxiliary motor which can supply sufficient power to it on a one-off basis to prevent it from stopping. The method defines two levels of instantaneous speed. If the predicted instantaneous speed is located in the intervention zone between the two levels, the auxiliary motor assists the rotation of the main engine to enable it to rotate in the same direction, without stalling.

Abstract: A method for establishing a functional diagnosis for a buck static DC-DC voltage converter in an electric or hybrid vehicle including a power supply circuit including at least a first and a second electrical voltage source supplying respectively a primary and a secondary circuit with direct current, the first source having a voltage value greater than the second source, the primary and secondary circuits being connected by the voltage converter which itself is commanded by control and safety elements, includes the following sequential steps: deactivating any power consumer on the primary circuit or waiting for any power consumer on the primary circuit to be inactive, commanding from the converter an output voltage greater than the voltage of the second electrical voltage source, determining if there is a power transfer from the primary to the secondary circuit, and: if not, establishing a faulty functionality diagnosis for the converter.

Abstract: Methods and systems are disclosed for controlling an electric vehicle. The method includes determining that the vehicle is stopped on a slope in an unparked mode without an accelerator or brake request. A holding force may be applied to hold the vehicle in the stopped position on the slope. After the vehicle has been stopped on the slope in the unparked mode without an accelerator or brake request for a predetermined amount of time, the holding force may be reduced to remind a driver that the vehicle is in the unparked mode.