Renault S.a.s.

Sid-Ali Randi

Daniel Chatroux

Ahmed Ketfi-Cherif

Sebastien Carcouet

Michel Mensler

Lionel Cordesses

Sébastien Carcouet

Nicolas Fremau

Antoine Vignon

A method for estimating insulation resistance between a terminal of a battery and an electrical ground, including: connecting a measuring circuit to one terminal of the battery, the measuring circuit including a resistance of known value and a capacitance; application of a known input signal having an input voltage; measurement of an output voltage between the ground and a point located between the resistance of known value and the capacitance; determination of a complex impedance of a dipole of the capacitance and the insulation resistance or determination of parameters of a differential equation; and determination of the insulation resistance from the parameters of the differential equation or the complex impedance.

Method and system for estimating the insulation resistance between a battery and an electrical earth

An electrical architecture of a hybrid motor vehicle including a combustion engine driving an alternator that recharges a low-voltage on-board battery connected to a starter of and to a vehicle on-board network, an electric traction machine powered by a high-voltage traction battery, and a hybrid transmission including a coupling mechanism that can occupy at least a first position in which the combustion engine is uncoupled from the drive train connecting the electric machine to vehicle wheels, a second position in which the wheels are driven by the combustion engine with or without top-up from the electric machine, and a third position in which the combustion engine and the electric machine are coupled to combine their respective torques, bound for the wheels. The combustion engine and the alternator constitute an electricity generator configured to supply energy requirements of the traction electric machine in an electric mode.

Electrical architecture of a hybrid vehicle, hybrid vehicle and control method

A hybrid transmission for a motor vehicle including a heat engine and a driving electrical machine, including two concentric primary shafts, each of which includes at least one intermediate drive on a secondary shaft connected to wheels of the vehicle. The transmission includes a first mechanism for coupling the two primary shafts together, and capable of assuming at least three positions, of positions in which: the heat engine is separated from the drive train connecting the electrical machine to the wheels; the heat engine drives the wheels with or without the assistance of the electrical machine; and the heat engine and the electrical machine are coupled together to add respective torques thereof to the wheels.

Hybrid transmission for a motor vehicle, and control method

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Chambery, France

Sid-Ali Randi