Method of limiting torque of an electric machine of a hybrid vehicle with a speed control system

Abstract

A method for a hybrid vehicle for limiting the torque drawn by a first electric machine (12) linked to a combustion engine (2) linked to a transmission (4), said first machine being designed to supply current to a battery (10) of the onboard network of the vehicle, and an energy storage device (16) which delivers said energy to a second traction electric machine (20), the vehicle comprising an automatic system for controlling the speed of same, characterised in that, in case the combustion engine (2) is not able, on a given ratio of the transmission (4), in response to a request from the automatic speed control system, to deliver the preferred acceleration, it sheds the load of the energy storage device (16) or of the battery (10) of the onboard network before using the second electric machine, or changing the ratio, if this load shedding alone is not sufficient to provide the preferred acceleration.

Description

technical field

[0001] The invention relates to a hybrid vehicle having a traction heat engine and an electric machine coupled to the heat engine, the electric machine capable of charging an electrical energy storage device, a method of limiting the torque driving the electric machine, and the implementation of the method of hybrid vehicles. Background technique

[0002] One class of known hybrid vehicles has a traction heat engine, which may be of gasoline or diesel type, driving the front wheels through a transmission comprising different ratios, coupled in a permanent manner to a front electric motor which can act It acts on the engine to start the heat engine, and on the generator to charge the battery and electrical energy storage of the on-board network.

[0003] The energy storage device supplies power to a second rear electric motor that drives the rear wheels, which can also act on the engine to transmit torque at these wheels, or on a generator to recover vehicle ...

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