Thermostat-controlled regulation valve for a fluid and cooling circuit including such a valve

Thermostat controlled fluid regulation valve, comprising:

• a housing delimiting a fluid circulation chamber inside the housing, the fluid chamber including a first fluid inlet at a first temperature, a second fluid inlet at a second temperature, and a first fluid outlet and a second fluid outlet through which fluid can freely communicate with the first and second inlets respectively, independently of the first and second temperatures, and
• thermostat-controlled means for controlling fluid circulation through the chamber, adapted firstly so that fluid can freely pass through the chamber between the first inlet and the second outlet and between the second inlet and the first outlet when either the value of the first temperature is less than a first predetermined threshold value, or the value of the second temperature is greater than a second predetermined threshold value strictly greater than the first threshold value, and secondly to prevent fluid from circulating through the chamber between the first inlet and the second outlet and between the second inlet and the first outlet when the value of the first temperature is greater than the first threshold value and also the value of the second temperature is less than the second threshold value.