Renault S.a.s.

Gareth Pugsley

Serge Loudot

Sylvain Facchin

Sandrine Calixte

Jerome Utter

Alfred Brunou

Gino Zammarchi

Jérôme Utter

Guillaume Torres

A method for controlling an actuator for steering a wheel of a motor vehicle including an electrical actuator controlling steering angle of the steering wheel and a mechanism determining temperature of the actuator. The method includes: completing deactivating the actuator; and a counter-steering operation triggered when the temperature of the actuator is higher than or equal to a determined prevention threshold.

Method for controlling a steering actuator comprising a counter-steering step before a deactivation step

A method for securing control of rear wheels of a motor vehicle including an electric power steering system, the method including: measuring or calculating, using a motor-angle sensor, at least angular position of the electric power steering motor, and measuring or calculating, using a steering-wheel angle sensor, at least angular position of the steering wheel; calculating, using the motor-angle sensor, at least the angular position of the steering wheel; comparing at least the angular position of the steering wheel measured using the steering-wheel angle sensor to the angular position of the steering wheel measured using the motor-angle sensor; and transmitting an alarm signal if the result of the comparison is greater than a predetermined threshold value.

Method for securing the control of the rear wheels of a motor vehicle provided with an electric power steering system

A device for controlling a power shunt circuit of a hybrid vehicle, including inverters, including DC sides linked to a DC voltage storage unit and AC sides intended to be linked to polyphase electrical machines. The polyphase electrical machines are able to operate in engine/engine or generator/generator modes. A control unit controls chopping switches of the second inverter in a way that is temporally offset relative to chopping switches of the first inverter in such a case, the control unit of the inverters controlling their chopping switches by pulse width vector modulation.

Device and method for controlling a power shunt circuit, hybrid vehicle having same

An electric energy exchange system between at least one motor-generator system and at least one storage member determining a continuous storage voltage between two branches of a bus circuit on which are connected in parallel a DC/DC converter, a filtering capacity, and a DC/AC converter connected on at least one motor-generator system. The system includes at least one thyristor connected as a bypass on the positive bus between the storage member and the output of the converter-voltage raiser to short-cut the converter, and a thyristor priming device to, based on the required voltage at the filtering capacity, determine at least in discharge the shorting of the converter-voltage raiser with direct passage of the current through the thyristor as long as the voltage of the filtering capacity, which is substantially equal to the storage member voltage, is sufficient for the electric machines to provide requested torque. The system can particularly be applied to a power-bypass hybrid vehicle, for continuous variation of transmission ratio.

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Bois d'Arcy, France

Gareth Pugsley