| 摘要 |
A pressure control valve arrangement is provided for controlling the fluid pressure in an ABS brake system of a vehicle such that, in the event of a tendency of individual wheels of the vehicle to lock, the brake pressure in associated brake cylinders can be adaptively adjusted. At least two diaphragm valves, which have diaphragms which are loaded by spring elements, and at least one electromagnetic control valve, which can be activated by an electronic control device for the pilot control of the diaphragm valves, are provided in a housing of the pressure control valve arrangement. At least one valve seat of the at least one electromagnetic control valve is formed in a unipartite fashion with a housing part which is formed by a plastic injection-molded blank. |
| 主权项 |
1. A pressure control valve arrangement for controlling fluid pressure in an ABS brake system of a vehicle, the pressure control valve arrangement comprising:
at least two diaphragm valves having diaphragms loaded by spring elements, the spring elements being supported by centering pins that are formed integrally with the at least two diaphragm valves; at least one electromagnetic control valve activatable by an electronic control device, the at least one electromagnetic control valve being configured for pilot control of the two diaphragm valves; and a housing of the pressure control valve arrangement in which are arranged the two diaphragm valves and the at least one electromagnetic control valve, wherein a part of the housing is a plastic injection-molded blank that comprises in a unipartite construction at least one valve seat of the at least one electromagnetic control valve, the part of the housing being a single intermediate plate, the single intermediate plate is arranged between a housing part which has openings for the diaphragms and another housing part, in which the components of the at least one electromagnetic control valve are accommodated, with the exception of the at least one valve seat formed in the single intermediate plate, the housing of the pressure control arrangement consists exclusively of the housing part, the single intermediate plate and the another housing part, the another housing part is a plastic injection-molded blank into which at least one magnet coil of the at least one electromagnetic control valve is injected, the another housing part being injection-molded around the at least one magnet coil, and on which a plug-in contact housing, that is a separate piece from the another housing part of the housing, is arranged for control of said at least one magnet coil of said at least one electromagnetic control valve by an external electronic control unit, the at least one electromagnetic control valve is arranged to seal against the at least one valve seat, and the at least one valve seat has a conical shape and delimits a central fluid channel in the housing part, the conical shape being defined by a surface of the intermediate plate, and the at least one valve seat being provided with at least one annular blind hole recess having a tapered conical profile that facilitates the molding process. |
