Appeal No. 96-3156
Application 08/304,333
position, whereby master cylinder line (36) is connected to line
(36’), which communicates with, for example, wheel brake (17) via
ABS system (12) and line (36’’). In the powered second mode,
function control valve (39) is positioned in the non-illustrated
right hand or “II” position, whereby the master cylinder is
maintained in open flow communication with buffer reservoir (42)
(which appears to be equivalent to appellants’ artificial pedal
feel device), while pressure to the wheel brake is modulated by
brake pressure control valve (47) under the control of energizing
solenoid (64). In particular, depending upon the position of the
brake pressure control valve (47) amongst the “II”, “O” and “I”
positions, the pressure modulator (44) is placed, respectively,
in fluid communication with pressure source (48) to pressurize
the modulator, unpressurized storage reservoir (49) to vent the
modulator, or blocked from communicating with either to hold the
pressure of the modulator. The pressure condition of the
pressure modulator (44) is in turn relayed to the wheel brake via
line (36’), ABS system (12) and line (36’’) to modulate brake
pressure.
Arikawa also pertains to a fluid brake system for a vehicle.
The brake system of Arikawa includes, inter alia, a three-port
three position valve (36, 37, 47, 48) provided at each wheel
-4-
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Last modified: November 3, 2007