Renault S.a.s.

Compagnie Generale Des Etablissements Michelin

Michelin Recherche Et Technique S.a.

Maxime Debert

Ahmed Ketfi-Cherif

Yann Chamaillard

Guillaume Colin

Abdelmalek Maloum

Jean-Marie Vespasien

Gregory Launay

Antoine Saint-Marcoux

Yves Le Vourch

Franck Breuille-Martin

Jean Van-Frank

Karima Nair

Loic Le-Roy

Olivier Scheffges

Laurent Moity

Thomas Miro-Padonavi

Hatem Cherouat

Celine Suard

Grégory Launay

Loïc Le-Roy

Céline Suard

A method for starting a combustion engine fitted to a hybrid or dual-mode motor vehicle includes starting an additional motor upon a setpoint torque demanded by a driver of the vehicle, with a view to accelerating the vehicle beyond a threshold speed at which the combustion engine is driven beyond a stalling speed threshold when the combustion engine is mechanically coupled to wheels of the vehicle.

Method and system for starting a combustion engine

A method for controlling a mechanical torque transmitted to a driving wheel of a hybrid motor vehicle includes dividing a stroke of a vehicle acceleration pedal at a variable neutral point position into a first braking-adjustment stroke and a second acceleration-adjustment stroke, determining, within the first braking-adjustment stroke in which an electric motor of the vehicle operates as a generator, a regenerative braking torque setpoint for the electric motor based on a depression of the accelerator pedal and based on of a value of maximum energy recovery torque established based on a first function stored in a memory, and providing a value of maximum recovery torque depending on a vehicle speed. The first function assumes a value of substantially zero for an upper limit speed corresponding to the vehicle speed at the moment of coupling and decoupling of the electric motor by a connection device of the vehicle.

Control of torque transmitted to the driving wheel of a hybrid motor vehicle

A method controls the startup of a heat engine of a hybrid power train of a vehicle. The power train includes the heat engine and an electric drive machine, two concentric main shafts coupled one to the heat engine and one to the electric machine, at least one step-down gear of each of the main shafts on a secondary shaft connected to wheels of the vehicle, and a coupling of the two main shafts. The method includes coupling the two main shafts, inhibiting fuel injection of the heat engine, launching the heat engine by the electric machine, synchronizing a speed of the heat engine and a speed of the electric machine without fuel injection, activating the fuel injection and turning off the electric machine and decoupling the two main shafts.

Method for controlling the startup of the heat engine of a hybrid power train

A method manages energy of a power unit of a hybrid vehicle. The power unit includes at least one internal combustion engine and an electric drive machine, coupled to wheels of the vehicle by a transmission with discrete ratios. The method includes minimizing, at each operating point of the energy, an energy criterion linked to a sum of consumption of the internal combustion engine and an electrical consumption of the electrical machine multiplied by an equivalence factor weighting a supply of energy from the internal combustion engine and a supply of energy of electrical origin. The minimized criterion is a mixed criterion which is a sum of an energy criterion and a discomfort criterion linked to management of kinematic modes of the transmission.

Energy management method on a hybrid vehicle comprising a transmission with discrete ratios

A method of determining an equivalence energy factor representing weighting applied between an infeed of energy of thermal origin and an infeed of energy of electrical origin, to minimize on an operating point overall energy consumption of a hybrid motor propulsion plant for an automotive vehicle including a heat engine and at least one electric motor powered by a battery. This factor is controlled in a discrete manner as a function of an instantaneous state of energy of the battery, and of an energy target, and as a function of the vehicle running conditions.

Method and device for controlling an energy equivalence factor in a hybrid motor propulsion plant

A method manages energy of a hybrid vehicle. The vehicle includes a heat engine, one or more electric traction motors, a high-voltage traction battery, a low-voltage on-board battery for accessories of the vehicle, a current inverter to transform direct currents into alternating currents for the electric motor, and a reversible current transformer to convert high-voltage current into low-voltage current of the on-board battery and to use a stock of energy available in the low-voltage battery to not draw energy from the high-voltage battery when it has a relatively low level of charge. The method includes determining an operating point of the vehicle involving a minimum fuel consumption in the heat engine by imposing on the electric motor a torque that minimizes a criterion of total fuel consumption by the consumption of the heat engine, power consumed in the traction battery, and power consumed in the on-board battery.

Method and device for managing the energy of a hybrid vehicle

A method for managing charging of a rechargeable battery including at least one module including at least one electrochemical cell, the method including estimating a heat flow produced in the at least one module using an observer estimating overall internal resistance of the electrochemical cells of the module.

Method for managing the charging of a rechargeable battery of a motor vehicle

A method controls a motor vehicle including an internal combustion engine coupled to a first axle set and to at least two electric machines each one coupled to one wheel of a second axle set. The method includes determining the speed of at least one of the electric machines; comparing the determined speed against a threshold; and altering, if the determined speed is above the threshold, the maximum torque of the electric machines so as to limit the rotational speed of the machines.

System and method for controlling a motor vehicle with independent rear electric machines

A method for controlling recharging of a traction battery on a motor vehicle hybrid transmission including a heat engine and at least one electrical machine, wherein the electrical machine is used as a sole motor-driven power source up to a speed threshold beyond which it is possible to couple the heat engine with the wheels, in hybrid modes, to run power supplies from the heat engine and the electrical machine simultaneously with each other. In the method, below the speed threshold, the electrical machine ensures only torque to be transmitted to the wheels, while the heat engine is ignited to provide recharging without contributing to pull of the vehicle when a driver bears on the accelerator pedal, and while the wheels are separate from the heat engine and the electrical machine, when the driver does not bear on the accelerator pedal, to enable recharging of the battery.

Method for controlling recharging of the battery on a hybrid vehicle

A method of estimating temperature at a core of a module of a traction battery of an electric or hybrid vehicle in which is packaged a plurality of electric charge accumulating elements, the method including: measuring a temperature at a level of an exterior wall of the battery module; and calculating an estimation of the temperature at the core of the battery module on the basis of the measurement of the temperature.

Method for estimating the temperature at the core of a battery cell

A method for managing energy in response to a request of a driver for torque on a power train of a hybrid vehicle including a heat engine and at least one electric motor powered by a battery, capable of recovering energy during deceleration in accordance with a management rule distributing the energy supply from the heat engine and from the electric motor in real time. The energy-management law depends on: an equivalence factor that is based on an instantaneous energy state of the battery, an energy target, and travel conditions of the vehicle; and a discharge precompensation factor that is based on energy potential that can be recovered during deceleration.

Growing community of inventors

Versailles, France

Maxime Debert