Fluid-pressure and analogous brake systems – Speed-controlled – Current control of linear piston drive motor
Patent
1995-03-02
1996-03-05
Ballato, Josie
Fluid-pressure and analogous brake systems
Speed-controlled
Current control of linear piston drive motor
3031152, B60T 858
Patent
active
054961025
ABSTRACT:
A brake system comprising a hydraulic brake, wherein the brake includes a displaceable braking surface, wherein the hydraulic brake requires low pressure to effect displacement during initiation of a brake apply and increased pressure to effect displacement as brake apply progresses, wherein the increased pressure exponentially increases in a non-linear response curve, a motor driven hydraulic actuator having a rotary input provided by a motor and a hydraulic output coupled to the hydraulically actuated brake, wherein the rotary input requires low torque during the initiation of brake apply to effect displacement of the hydraulically actuated brake and requires increased torque to effect rotary motion and displacement of the hydraulically actuated brake as brake apply progresses, the motor characterized by a progressively changing non-linear operation having a low torque mode and a high torque mode, and a control apparatus for the motor controlling the motor to effect displacement of the hydraulic brake, wherein the motor provides increased torque versus displacement in an exponentially increasing non-linear response curve and wherein the motor provides maximum velocity versus displacement in an exponentially decreasing non-linear response curve, wherein the brake system minimizes apply time of the hydraulically actuated brake.
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Dimatteo Michael A.
Disser Robert J.
Foust Jeff A.
Fulks Gary C.
Monahan Michael B.
Ballato Josie
General Motors Corporation
Simon Anthony Luke
LandOfFree
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