Fluid-pressure and analogous brake systems – Speed-controlled – Having a valve system responsive to a wheel lock signal
Patent
1990-08-17
1992-05-05
Butler, Douglas C.
Fluid-pressure and analogous brake systems
Speed-controlled
Having a valve system responsive to a wheel lock signal
303 92, 303113TR, 303119R, B60T 832
Patent
active
051101912
ABSTRACT:
The master cylinder (12, 212) comprises either a nonboosted master cylinder (12), a vacuum servomotor (14) boosted master cylinder (12), or a hydraulic pressure boosted master cylinder (212), each of which includes a fluid supply regulator (37) disposed within an end (26) of the master cylinder (12, 212). The fluid supply regulator (37) comprises a regulator valve (40) disposed within a stepped bore (34, 234) at the end (26) of the master cylinder (12, 212), the stepped bore (34, 234) communicating with the secondary pressure chamber (32, 232) of the master cylinder (12, 212). Hydraulic pressure generated by movement of the secondary piston (18, 218) causes the supply reguglator valve (40) to be displaced and open a valve (54) within the stepped bore (34, 234) to permit pressure from a pump (70) and an accumulator (60) to be supplied to the adaptive braking system (80). If the master cylinder (12, 212) should experience a fluid pressure failure, a full stroke displacement of the secondary piston (18, 218) by the vehicle operator causes the secondary piston (18, 218) to engage and displace the supply regulator valve (40) so that fluid pressure is communicated to the adaptive braking system (80) and is directly proportional to the vehicle driver's input force.
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Allied-Signal Inc.
Butler Douglas C.
Decker Ken C.
Palguta Larry J.
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