Hydraulic friction clutch for automobile cooling fan

摘要

The clutch has a supply chamber (5) and a working chamber (60), with a control valve for controlling the fluid circulation between them. The valve lever (9) is operated directly or indirectly via a piezoceramic operating element (13).Pref. the piezoceramic operating element is coupled to an electronic regulation stage providing a temp-dependent regulation signal. The piezoceramic operating element is pref. contained within the supply chamber of the clutch.