Motors: expansible chamber type – Working member position feedback to motive fluid control – Plural input signal means for single motor valve
Patent
1998-11-18
2000-12-19
Lopez, F. Daniel
Motors: expansible chamber type
Working member position feedback to motive fluid control
Plural input signal means for single motor valve
F15B 903, F15B 910
Patent
active
061614637
ABSTRACT:
A negative pressure booster equipped with an electromagnetic auxiliary control means can introduce air into an operation chamber in correspondence with normal braking and urgent braking by a single valve element which is simple in structure and provides good response. A valve element is supported for to-and-fro movement within a prescribed stroke in the input member and spring-biased to the side of the retraction limit. A solenoid and fixed core of an electromagnetic auxiliary control means is fixed to the valve cylinder coupled with booster pistons. A movable core opposite to the fixed core is coupled with the valve element. When the solenoid is excited while the input member advances, the movable core is operated so that the advancement quantity (communication opening degree between the operation chambers and air) of the valve element for the valve cylinder exceeds that of the valve element operated by the input member.
REFERENCES:
patent: 5096267 (1992-03-01), Volz
patent: 5483866 (1996-01-01), Schluter
patent: 5711202 (1998-01-01), Tsubouchi
patent: 5845556 (1998-12-01), Tsubouchi et al.
Lopez F. Daniel
Nissin Kogyo Co. Ltd.
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