System for controlling the thermal energy of a motor vehicle engine by adjusting the fluid actuators of said system

A thermal energy management system developed by an automotive vehicle thermal engine, comprising:

• a high-temperature circuit running a high-temperature heat carrier fluid also including a vehicle engine, and a high-temperature cooling radiator through which the high-temperature heat carrier fluid is in an heat exchange relation with a cooling fluid;
• a low-temperature circuit running a low-temperature heat carrier fluid and integrating a low-temperature cooling radiator through which said low-temperature heat carrier fluid is in heat exchange relation with the cooling fluid;
• a plurality of first actuators to circulate the high-temperature heat carrier fluid and the low-temperature heat carrier fluid respectively in high-temperature circuit and in low-temperature circuit, wherein the plurality of first actuators are circulating pumps mounted on both high and low-temperature circuits;
• a plurality of second actuators to circulate cooling fluids in high and low-temperature radiators;
• and
• sensors to capture parameters representative of the cooling needs of the high-temperature circuit and/or the low-temperature circuit and to supply such parameters to a control unit in the management system, said control unit regulating the plurality of first and second actuators according to said parameters,
• wherein the high-temperature and low-temperature radiators are liquid/gas radiators, and wherein said cooling fluid is atmospheric air outside said vehicle, wherein the plurality of second actuators for the high and low-temperature radiators are motor-fan groups forcing cooling air circulation through the high and low-temperature radiators,
• wherein the control unit uses the capacity of a low-temperature circuit circulating pump before that of the motor-fan group by comparing at least one of the parameters to a high threshold value of the low-temperature circuit circulating pump,
• wherein the high threshold value of the low-temperature circuit circulating pump is less than a high threshold value of the motor-fan group,
• wherein when the at least one of the parameters is lower than the high threshold value of the low-temperature circuit circulating pump, the at least one of the parameters is compared to a low threshold value of the low-temperature circuit circulating pump, and
• wherein the low threshold value of the low-temperature circuit circulating pump is less than a low threshold value of the motor-fan group.