Hydraulic booster

Details Hydraulic booster Hydraulic booster

1995-07-20

1996-06-18

Lopez, F. Daniel

Motors: expansible chamber type

Working member position feedback to motive fluid control

Follower type

91446, 60552, F15B 910

Patent

active

055267319

ABSTRACT:
The valve portion of pressure control valve tends to be unstable because when the valve is opened, the valve opening pressure intensifies. To prevent this, the valve portion of the pressure control valve is in the form of a puppet valve so that the valve body of the valve portion receives the pressure of a dynamic pressure source in the valve-opening direction and receives the pressure of an fluid pressure introducing chamber in the valve-closing direction. With this arrangement, when the valve opens and the dynamic pressure source pressure drops, the valve-closing force increases, so that the pressure control valve shows a stronger tendency to close. This prevents the freefall of the pressure source pressure, so that the behavior of the valve portion stabilizes. Thus, it is possible to prevent vibrations and abnormal noise.

REFERENCES:
patent: 4463561 (1984-08-01), Leiber

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