Cooling system and method for a hybrid powertrain of a motor vehicle

摘要

A cooling system for a hybrid powertrain of a motor vehicle comprising an internal combustion engine and an electric traction assembly, comprising a main circuit that can be traversed by a coolant in order to cool the internal combustion engine to a first temperature level and a secondary circuit that can be traversed by a coolant to cool the electric traction assembly to a second temperature level, lower than the first level, each of the circuits and comprising a radiator capable of cooling the coolant by means of heat exchange with an air flow, at least one hydraulic pump for circulating the coolant in the coolant circuits, and one electronic control unit capable of controlling the hydraulic pumps. The control unit comprises a module for recovering information on the dynamics of the vehicle and a module for controlling the flow from the hydraulic pumps on the basis of that information.

主权项

1. A cooling system for a hybrid powertrain of a motor vehicle comprising an internal combustion engine and an electric traction assembly, comprising:
a main circuit which is able to be traversed by a heat transfer fluid in order to cool the internal combustion engine to a first temperature level, the main circuit including a first radiator to cool the heat transfer fluid, a first hydraulic pump to circulate the heat transfer fluid in the main circuit, and an electric control unit to control the first pump; and a secondary circuit which is able to be traversed by a heat transfer fluid in order to cool the electric traction assembly to a second temperature level, lower than the first level, the secondary circuit including a second radiator to cool the heat transfer fluid, a second hydraulic pump and a third hydraulic pump to circulate the heat transfer fluid in the secondary circuit, and an electric control unit to control the second and third pumps, wherein the electric traction assembly includes at least one inverter and at least one electric motor, the inverter being arranged in the secondary circuit in parallel with the electric motor such that the electric control unit controls the second and third pumps to cool the electric motor and the inverter at different flow rates of the heat transfer fluid, and wherein the control unit comprises a module for recovering information on dynamics of the vehicle and a module for controlling the flow rate from the hydraulic pumps as a function of the information.