Appeal No. 1999-1058 Page 7
Application No. 08/832,960
locking tendency of one of the right front and left front
wheels having a higher wheel speed than the other. A timer is
also provided for measuring a duration in which the first and
second pressure control signals are both for one of
continuously reducing, and alternatively reducing and
maintaining, the braking pressure to the right front wheel and
the left front wheel, respectively. The central processing
unit selects the first control mode when the duration is less
than a predetermined value and the second control mode when
the duration is more than a predetermined value. Similar
calculations and judgements for anti-lock control are made for
the rear wheels (col. 4, lines 51-53).
Steiner discloses an automatic vehicle brake-pressure
control device for a vehicle equipped with an ABS (29),
including a vacuum brake power assist unit (18). In order to
trigger the actuation of the automatic braking system in
Steiner, the speed with which the driver operates the brake
pedal (19) is continuous monitored. If this speed overshoots
a prescribed threshold value M , the brake power assist unit
s
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