| 摘要 |
A hydraulic force booster for actuating master cylinder pistons in brake systems of automotive vehicles, comprises a lever system including two levers (33,34) pivotably interconnected by way of a journal (35). The second lever, by way of a coupling (45) is in communication with a set element (46) provided at the control piston (13) of a brake valve (9). The coupling (45) comprises a coupling element (53) provided at the second lever (34), and at least one guide surface provided at the set element (46) is connected to the control piston (13) by way of joint (47) and, at the other end, by providing another joint (48), is guided in a substantially co-axial housing bore (49). The coupling element (53) can be formed by a loose roller thereby substantially precluding that transverse forces be exerted on the control piston (13) of the brake valve (9) likely to result in lockings. |
