Renault S.a.s.

Nissan Motor Company Limited

Ludovic Merienne

Pedro Kvieska

Abdelmalek Maloum

Ahmed Ketfi-Cherif

Michel Mensler

Christophe Ripoll

Ana-Lucia Driemeyer-Franco

Edouard Negre

Laurent Gagneur

Christophe Konate

Adbelmalek Maloum

Malek Ghanes

Nesrine Ben Beldi

Bruno Kvieska

Thibault Baumann

Olivier Reyss

Loïc Le Mao

Adrien Chameroy

Sebastien Rouquet

Nesrine Ben-Beldi

A control method is provided for controlling a declutching of a sliding gear of a vehicle gearbox having dogs. The sliding gear rotates with a shaft of the vehicle gearbox on which the sliding gear moves axially between a declutched position and an engaged position to transmit rotation to a vehicle wheel. The control method comprises applying a zero torque request to all power sources of the vehicle, applying a declutching instruction to the sliding gear, estimating a resistance torque on the dogs in absence of rapid declutching, calculating a residual torque on the dogs as a function of a calculated resistance torque and an anti-disengagement angle of the resistance torque on the dogs, cancelling the residual torque by application of two opposing cancellation torques on the sliding gear, and declutching the sliding gear.

Method of controlling the declutching of a sliding gear

A device synchronizes primary speed of a primary shaft receiving an electrical torque from an electric machine with a secondary speed lower than the primary speed of a secondary transmission shaft. The primary shaft and secondary shaft are decoupled. The primary shaft has a kinetic energy associated with the primary speed. The device provides electrical braking torque to the primary shaft until the primary speed is substantially equal to the secondary speed. The device also at least partially recovers, in the form of electrical energy, the kinetic energy lost by the primary shaft and transmits the electrical energy to an energy storage device.

Device for synchronization of a pinion on a gearbox shaft in regenerative mode, and corresponding method and motor vehicle

A method for estimating an insulation resistance between a point of a high-voltage circuit including a high-voltage motor vehicle battery and a ground of the vehicle includes measuring a voltage value at terminals of a measurement circuit that includes a capacitive element connected to the battery and calculating a standard deviation value based on the measured voltage value and based on a theoretical voltage value estimated from a model of the measurement circuit. The model is a function of a capacitance value of the capacitive element. The method also includes calculating an averaged deviation value from the standard deviation value and previous deviation values and estimating an updated insulation resistance value in accordance with the averaged deviation value.

Estimation of the insulation resistance between a motor vehicle battery and the earth

A method controls a shift actuator with a sliding gear for a gearbox. The gearbox includes a control element for controlling a shift fork responsible for disengaging and engaging pinions on a shaft of the gearbox that receives torque from a traction machine powered by the on-board electrical system of the vehicle. The control element is positioned upstream of a mechanical spring-assist system and regulated in position by a DC actuating motor. The method includes temporarily raising a supply voltage applied to the actuating motor above a base voltage of an on-board electrical system during the disengaging and engaging the pinions.

Method for controlling a gear shift actuator and corresponding shift actuator

A method is provided for controlling the position of a gearbox actuator in charge of engaging a ratio at the end of a preliminary phase of synchronizing two shafts of the gearbox via a torque-driven traction machine to bring the speed difference of the two shafts within a range enabling the mechanical coupling thereof. The method ensures that the speed measured on one of the two shafts converges with a speed observed as a function of the inertia value observed on this shaft relative to the value expected as a function of the gearbox actuator, and of an estimation of the machine torque.

Method for controlling the position of a gearbox actuator

A battery of accumulators including a plurality of power storage cells and an electrical network which connects the cells to one another. The cells are grouped together in composite cells including two identical branches each including at least one cell and the composite cells being connected in series to one another. The electrical network includes: a mechanism for parallel or connection in series of the cells of each composite cell, and a mechanism for controlling the connection mechanism, which is configured to connect the cells of each composite cell in parallel or in series to adapt an output voltage of the battery of accumulators to a desired value and to balance charging states of the cells.

Structure for modulating the voltage of a battery and the active equilibration thereof

A method for controlling a power train and corresponding system. A method for controlling a power train equipping a motor vehicle and comprising an electric motor provided with a rotor and a stator, said method comprising the regulation of the currents of the rotor and the stator delivering control signals to the electric motor, said currents to be regulated and said control signals being expressed in a rotating reference system and comprising a plurality of axes. The method includes a measurement of the values of the currents of the rotor and the stator, a transformation of said measurements into said rotating reference system, a determination of minimum and maximum limits for each of the currents on the basis of said control signals, and a comparison of the measured signals with said minimum and maximum limits.

Method for controlling a power train and corresponding system

A system and method for secure charging of a motor vehicle battery including the steps of secure charging of the battery of a motor vehicle from a network estimating the resistance between the earth and the neutral of the network, including at least one injection of pulses of current into the network, measurements of voltage between the earth and the neutral of the network in response to each pulse, and a determination of the earth resistance from the measured voltages. Each injection of current pulses into the network includes the injection of a first positive pulse followed by a second negative pulse, the first and the second pulses having an equal intensity in terms of absolute value and being separated by a sufficiently short interval for a stray capacitor coupled to the network to be further charged during the second pulse.

System and method for secure charging of a motor vehicle battery

A secure system for charging a battery of a motor vehicle from a power supply network, which system is in a vehicle and includes a mechanism measuring frequency of the network, an injection mechanism injecting current pulses into the network, a mechanism measuring voltage between the ground and a neutral of the network, an analog filter filtering the measured voltages at high frequencies, a digital filter filtering the analog-filtered voltages at low frequencies, and a mechanism determining resistance between the ground and the neutral of the network on the basis of the digitally filtered voltages and an amplitude of the current pulses. The digital filter includes a mean value filter which determines a mean value based on N voltage measurements spaced apart by a time interval T+T/N, where T is the period of the network determined by the mechanism measuring the frequency of the network.

Secure on-board system for charging the battery of a motor vehicle from a power supply network

A method for controlling a battery charger for a motor vehicle, the battery charger including an input filter connecting a three-phase power supply circuit to a buck converter, a boost circuit being connected to the buck converter and to the battery. The method includes: determining an output threshold voltage of the buck converter on the basis of the difference between a battery-current measurement and a battery-current request; keeping the output voltage of the buck converter constant; and controlling switches of the boost stage to be kept open.

Method for controlling a charger for a motor vehicle battery with a reduction of losses due to switching

A method controlling a powertrain fitted in an automobile and including an electric motor including a rotor and stator, the method including: regulation of currents of the rotor and the stator via control signals from the electric motor, wherein the currents and control signals are expressed in a rotating coordinate system and include a plurality of axes, the control signals resulting from a first transformation including a change of variable that enables dynamic decoupling between the control signals, along each of the axes of the plurality of axes; saturation of the control signals resulting from the first transformation to satisfy constraints of a battery fitted in the automobile and connected to the electric motor; and blockage of at least some of the current reference values of the regulation if the control signals are saturated.

Method and device for controlling a powertrain

A method for controlling electromagnetic torque of a three-phase synchronous machine with permanent magnets, including measuring current delivered to the three phases of the machine, transposing the three measured currents into a direct current component and a quadratic current component using Park's transformation, and receiving an instruction for the quadratic current component. When the direct current component is negative, a defluxing control mode is activated in which the machine is controlled from a direct voltage component and a quadratic voltage component of the machine, the direct voltage component and the quadratic voltage component being determined in Park's plane.

Method for controlling the electromagnetic torque of a high-speed-synchronous machine

A system and method for controlling a power train of a motor vehicle having an electric motor includes regulating the currents in the rotor and stator of the electric motor so that they reach required current values using control signals of the electric motor. The currents to be regulated and the control signals being expressed in a rotating reference frame including a plurality of axes. The control signals result from a transformation including a change of variable allowing the dynamic decoupling of the regulation along each of the axes. Regulating each axis includes an application to the current to be regulated of two different linear operators as a function of the value of the current to be regulated of that axis with respect to its required value, the result of the application of the two linear operators having to be substantially equal to the control signal of that axis.

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Gif sur Yvette, France

Ludovic Merienne