Fluid-pressure and analogous brake systems – Speed-controlled – Having a valve system responsive to a wheel lock signal
Patent
1995-05-22
1996-11-12
Oberlfitner, Robert J.
Fluid-pressure and analogous brake systems
Speed-controlled
Having a valve system responsive to a wheel lock signal
303137, 303150, B60T 842
Patent
active
055733131
ABSTRACT:
A method and apparatus for controlling brakes using a reciprocating cut valve actuated by an expander piston that is moved via a crank pin on a crank shaft. The cut valve cuts off caliper pressure and adjusts the volume and pressure of an output hydraulic chamber to effectuate antilock braking. When changing from antilock braking to normal braking, the movement of the expander piston is controlled by repeatedly changing a crank angle of the crank pin during specified time intervals. The rate of increase in caliper pressure can be set according to (1) detected brake operation which is detected from a present crank angle and a target crank angle and (2) the frictional state of the road surface which is estimated from vehicle acceleration/deceleration.
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Hayashi Tatsuo
Kumagai Chiaki
Matsuto Takushi
Ota Atsuo
Sakurai Takeshi
Honda Giken Kogyo Kabushiki Kaisha
Oberlfitner Robert J.
Poon Peter M.
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