Patent ID: 6113066
Filing Date: 2000-09-05
Classification: B60T,F16K

Abstract:
An electromagnetically actuated valve (10), for hydraulic brake systems of motor vehicles, comprising:a seat valve (41) is provided between a pressure fluid inlet (24) and a pressure fluid outlet (33),the seat valve (41) has a hollow cone-shaped valve seat (28) and a closing member (37) in the shape of a segment of a ball,the valve seat (28) is centrally fed by an influx bore (29) that communicates with the pressure fluid inlet (24),the valve member (37) is embodied with a sharp-edged transition at an end face of a cylindrical section (38) of a tappet (20),the tappet (20) is engaged by a magnet armature (19) that acts on the tappet in a closing direction and by a restoring spring (22) that acts on the tappet in the opening direction,a sealing diameter (D.sub.2) of the valve seat (28) has at least 1.3 times a diameter (D.sub.1) of the influx bore (29),a cone angle (.alpha.) of the valve seat (28) is at most 110.degree.,a magnetic force (F.sub.M) exerted on the magnet armature (19) and transmitted to the closing member (37) can be changed smoothly, wherein its course monotonously decreases with an increasing valve opening stroke (H),a force (F.sub.p +F.sub.F) on the closing member (37), produced by the pressure fluid and the restoring spring, has a course that monotonously decreases with the increasing valve opening stroke (H), whose inclination is quantitatively greater than that of the magnetic force progression.