Motors: expansible chamber type – Working member position feedback to motive fluid control – Plural input signal means for single motor valve
Patent
1998-11-06
2000-09-19
Look, Edward K.
Motors: expansible chamber type
Working member position feedback to motive fluid control
Plural input signal means for single motor valve
91376R, 3031133, 3031143, F15B 1316
Patent
active
061195774
ABSTRACT:
A tandem brake booster includes a solenoid within a valve body, and the solenoid may be energized to move a first tubular member disposed on the valve body rearward. When an input shaft is driven forward in the inoperative condition of the brake booster, a vacuum valve is closed while an atmosphere valve is opened in the similar manner as occurs in the prior art, thus actuating the tandem brake booster 1. When an input or the force of depression applied to a brake pedal rises to a given value X during the operative condition of the brake booster, the solenoid is energized, whereupon the first tubular member is moved rearward relative to the valve body, and the valve element is also moved rearward. This opens the atmosphere valve which has been closed during the servo balance condition, allowing a further introduction of the atmosphere into variable pressure chambers B, D, enabling a rise in the output even though the input remains unchanged. In this manner, the invention provides a functioning which is equivalent to a brake booster which is arranged to provide a variable servo ratio.
REFERENCES:
patent: 5845556 (1998-12-01), Tsubouchi et al.
Imoto Yuzo
Sawada Mamoru
Takasaki Yoshiyasu
Denso Corporation
Jidosha Kiki Co. Ltd.
Lazo Thomas E.
Look Edward K.
LandOfFree
Brake booster does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Brake booster, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Brake booster will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1061391