Abstract: The invention relates to a fluid circulation valve for a motor vehicle, including a valve body (2) having a conduit (3), a flap (5) closing off the conduit (3) fastened on a shaft (4), a rotary control member (21) of the shaft (4), fastened at a proximal end (12) of the shaft (4) and the rotation of which selectively commands the opening and closing of the conduit (3) by the closing flap (5), and a torsional return spring (42) of the control member (21), a stop (76) being provided at one distal end (11) of the shaft (4), opposite the proximal end (12), to keep the closing flap (5) in the axial position in the conduit (3) by cooperation with the valve body (2), against a force of the return spring (42), the stop (76) including a flat washer (102) fastened on the lateral end (11) of the shaft (4).

Abstract: The electromagnetic valve actuator has an armature (22) of ferromagnetic material fixed to the stem of the valve, springs are provided to hold the valve at rest in a middle position between a fully open position and a closed position, and a single coil (38) is mounted on a ferromagnetic circuit. In combination with the armature, the magnetic circuit presents two stable magnetic flux paths both of which correspond to an airgap of small size.

Abstract: The components (13, 14) are mounted on a two-faced printed circuit (22) fened to a metal heat-conductive substrate (12) which is integral with the housing and to which a connector (8) is electrically connected which is also integral with the housing and is arranged on the same side of the substrate (12) as the printed circuit (22). The metal heat-conductive substrate (12) has a cutout to serve as support for the connector (8) which is soldered on the face of the printed circuit (22) facing the substrate (12) at the place of the cutout. The invention is advantageous for switches associated with computer controlled actuators.