Patent ID: 8281884

Claim:
Cooling system for a vehicle with hybrid propulsion; the cooling system comprises a hydraulic circuit, inside which a cooling fluid flows, and presents: a main branch which carries out the cooling of a heat engine and comprises at least a first pump, mechanically operated by the heat engine, and at least one radiator, which is hit by air when the vehicle is moving; and a secondary branch which is parallel connected to the main branch by means of a starting offtake and an arrival offtake, has no radiators, carries out the cooling of a first electronic power converter controlling a reversible electric machine which can be mechanically connected to the driving wheels, and comprises at least a second pump operated electrically; wherein the main branch comprises a nonreturn valve which is placed between the starting offtake and the arrival offtake, and allows the cooling fluid to flow along the main branch only from the starting offtake to the arrival offtake and not vice versa; the cooling system is characterised in that the second pump operated electrically is integrated with the first electronic power converter in order to form a single unit housed in a common case.