Motors: expansible chamber type – Working member position feedback to motive fluid control – Plural input signal means for single motor valve
Patent
1998-11-06
2000-12-05
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
061551562
ABSTRACT:
A brake booster includes a solenoid disposed within a valve body. When the solenoid is energized under the inoperative condition of the brake booster, a piston associated with the solenoid is moved to its operative position to close a vacuum valve while opening an atmosphere valve. This allows the brake booster to be operated as an automatic brake without depressing a brake pedal. The brake booster also comprises output restriction means which may comprise a spring 55 shown in FIG. 1, for example, whereby as the output increases when the brake booster is operated as an automatic brake, the output restriction means operates to cease an increase in the output. With this arrangement, if the solenoid is energized inadvertently independently from the intent of a driver, the occurrence of a quick braking action is avoided, but a gentle braking action is assured, thus improving the safeguard.
REFERENCES:
patent: 5704270 (1998-01-01), Tsubouchi
Imoto Yuzo
Sawada Mamoru
Takasaki Yoshiyasu
Denso Corporation
Jidosha Kiki Co. Ltd.
Lazo Thomas E.
Look Edward K.
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