Solenoid valve in a hydraulic brake system for motor vehicles

Details Solenoid valve in a hydraulic brake system for motor vehicles Solenoid valve in a hydraulic brake system for motor vehicles

1995-12-07

1997-06-17

Michalsky, Gerald A.

Valves and valve actuation

Lost motion between actuator and valve

25112919, 3031162, 3031192, F16K 3106

Patent

active

056390610

ABSTRACT:
A solenoid valve which guarantees the reliable opening of the valve, even when there are great pressure differences. The solenoid valve has an armature which receives a tappet, that can be longitudinally moved in the solenoid valve. A restoring spring, which transports the armature with the tappet into a closed position of the solenoid valve, engages one side of a collar of the tappet and a compression spring, which acts in the opposite direction from this restoring spring and is supported on the armature. The compression spring has a greater initial stress than the restoring spring. Pressure drops can produce a hydraulic closing force on the tappet, which force is directed counter to the magnetic force action. When the solenoid valve is switched over into the open position, the armature therefore executes a partial stroke (h) counter to the action of the compression spring before the armature carries the tappet along with it by means of engaging the collar, as a result of the magnetic force, which increases with the increasing armature stroke (H). The solenoid valve can be employed in a suction line between a master cylinder and a regenerative high pressure pump of a hydraulic brake system for motor vehicles.

REFERENCES:
patent: 2121657 (1938-06-01), Fisher
patent: 3970282 (1976-07-01), Hansen
patent: 4008876 (1977-02-01), Bastle
patent: 5335981 (1994-08-01), Volz et al.

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