| 摘要 |
<p>A pressure control device for a hydraulic circuit comprises at least one pressurized fluid generator (30), a brake motor (28) and a low-pressure fluid supply (32), and includes a computer-controlled solenoid valve which is connected to the pressurized fluid generator (30) and the brake motor (28) by respective ducts (29, 31), and comprises, in a housing (8), an electric coil (10) and a slidable magnetic core (12) controlling a slide valve (16). Said slide valve (16) slides in a bore provided in the body (18), defines two chambers (22, 40) on either side of the slide valve (16), and comprises a ball (50) valve (48) co-operating with a seat (52) on the housing (8), said slide valve (16) being provided with a channel (34) defined by two bearing surfaces (36, 38). One of the bearing surfaces (36) co-operates with the connecting duct (31) leading to the brake motor (28). The difference between the length (L) of said bearing surface and the diameter (D) of said duct is equal to a length (R) representing a functional overlap.</p> |
