Fluid-pressure and analogous brake systems – Speed-controlled – Having a valve system responsive to a wheel lock signal
Patent
1984-08-10
1986-03-11
Reger, Duane A.
Fluid-pressure and analogous brake systems
Speed-controlled
Having a valve system responsive to a wheel lock signal
303116, B60T 806
Patent
active
045751617
ABSTRACT:
Spinning of one of a pair of powered vehicle wheels is prevented by anti-spin cylinders connected between the master cylinder and each wheel cylinder. In normal operation, brake fluid passes through the anti-spin cylinders from the master cylinder to the wheel cylinders. If a differential rotational speed of the wheels is detected, one or the other of the anti-spin cylinders is operated to close its connection to the master cylinder, and to pressurize the brake fluid in the anti-spin cylinder so as to brake the spinning wheel. In one embodiment, pistons of first and second anti-spin cylinders are connected to be alternatively driven by a single double-acting vacuum-actuated diaphragm, with the diaphragm and anti-spin cylinders compactly packaged partly within the housing of a vacuum accumulator that drives the anti-spin cylinders. In a second embodiment, a reversible pump is employed to drive the pistons of one or the other of the anti-spin cylinders by means of three-way solenoid valves selectively operated according to a detected difference in rotational velocity of the driving wheels.
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Vanzant Karol W.
Vanzant Teddy L.
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