Patent ID: 7165523

Claim:
System for a motor vehicle, able, on the one hand, to start up an internal-combustion engine and, on the other hand, to charge an electrical circuit, including a main electrical machine able to operate, on the one hand, as a generator and, on the other hand, as an electric motor, said electrical machine driving the internal-combustion engine by means of a belt when said main electrical machine is operating in motor mode, the system further comprises a management means which drive the main electrical machine, further comprising a supplementary starter, as well as means for detecting at least one condition for triggering activation of said supplementary starter, and the management means drive the main electrical machine and the starter, according to a particular sequence, when said condition is detected by said detection means, wherein the management means include means for actuating the supplementary starter, when a condition for activating the supplementary starter is detected, in such a way that its pinion meshes on a complementary ring in order to drive the internal-combustion engine, in order to drive the main electrical machine in motor mode, when the pinion of the starter has been meshed and in order to cut off the starter and drive the main electrical machine in generator mode when it is detected that the internal-combustion engine has started and the management means include means for cutting off the operation of the main electrical machine in motor mode, when a condition for activation of the supplementary starter is detected.