Thermostatic valve for a fluid circulation circuit and a heat engine associated with a cooling circuit comprising such a valve

摘要

This thermostatic valve (10) comprises a casing (12) which delimits openings (14, 16, 18) for the circulation of the fluid, a mobile sleeve (22) for regulating the passage of the fluid between the openings, a fixed seat (34) for receiving the sleeve (22) and a thermostatic member (40) which has a mobile piston (44). The sleeve (22) is mounted on the piston in such a manner to control, at least in part, the displacements of the sleeve relative to the seat. The valve also comprises controlled means (56, 66) for driving the body (42) of the thermostatic member (40) in accordance with the direction of displacement of the piston (44). Application to a cooling circuit for engines having large cubic capacities, for example truck engines.