ACTUATING DEVICE OF A RECIRCULATION PUMP FOR A COOLING CIRCUIT OF AN INTERNAL COMBUSTION ENGINE

摘要

Actuating device (1) for a recirculation pump (2) of a cooling circuit of an internal combustion engine comprising a pulley (3) suitable for being rotationally driven by the engine, a driven shaft (5) for driving the pump (2) and an electromagnetically controlled coupling (6) interposed between the pulley (3) and the driven shaft (5), in which the electromagnetic coupling (6) comprises an electromagnet (18), coupling means (20) controlled by the electromagnet (18) and mobile between an engagement position in which the pulley (3) is connected to the driven shaft (5) and a disengagement position, and elastic means (30) for maintaining the engagement means (20) in the engaged position when the electromagnet (18) is not energized.