Fluid-pressure and analogous brake systems – Speed-controlled – Having a valve system responsive to a wheel lock signal
Patent
1990-08-17
1993-02-23
Butler, Douglas C.
Fluid-pressure and analogous brake systems
Speed-controlled
Having a valve system responsive to a wheel lock signal
13762565, 3031152, 3031162, B60T 832
Patent
active
051884364
ABSTRACT:
The linear variable pressure adaptive braking and traction control system (10) includes a control valve (70) having a linear actuator (72) and a valve (74). The linear actuator (72) may be operated to displace axially a valve member (82) of the valve (74) and which has a first valve seat (85) controlling fluid flow into a longitudinal passage (84) of the valve member (82). The first valve seat (85) engages a ball valve (101) disposed within an interior opening (97) of a slidable piston (90), the ball valve (101) biased by a resilient mechanism (102). The ball valve (101) also engages a piston valve seat (96) located at an end opening (94) of the piston (90). The piston (90) has a seal (92) thereabout and slides within a bore (76) of the valve (74). A spring mechanism (100) within the bore (76) biases the piston (90 ) toward an end (77) of the bore (76) having a passage (39) which communicates with a pump (50). An intermediate bore section (78) communicates with a passage (45) which connects the bore (76) with a wheel brake (20) via an electric valve mechanism (40). Another end (79) of the bore (76) includes a passage (55) which communicates the longitudinal passage (84) of the valve member (82) with a sump (58) that communicates with the pump (50). A vehicle master cylinder (30) communicates with the wheel brake (20) via the electric mechanism (90). The control valve (70) may be utilized to provide both adaptive braking and traction control system operation.
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Allied-Signal Inc.
Butler Douglas C.
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