Appeal No. 2002-1620 Page 5
Application No. 09/504,416
driver during a collision (especially a rear end collision), Bauer's invention provides a
system which simulates an increase volume requirement of the brake system, thus
permitting increased actuating travel of the actuating assembly.
In the embodiment of Bauer's brake system shown in Figures 4 and 5, an ABS
pressure modulator 40 is interposed between the master brake cylinder 2 and the
individual wheel brakes 18, 19, 20, 21 to permit a modulation of the pressures
prevailing in the wheel brakes 18 to 21 during ABS control operations. The ABS
pressure modulator 40 has a hydraulic motor-and-pump assembly 41 which comprises
a first pump 43 associated with the wheel brakes 18, 19, a second pump 44 associated
with the wheel brakes 20, 21 and an electric motor 42 which drives both pumps 43, 44.
Hydraulic lines 45, 46 lead from the pressure side of the pumps 43, 44 to the wheel
brake pairs 18, 19 and 20, 21, respectively.
Lines 45, 46 are connected with the pressure chambers of the master brake
cylinder 2 by way of lines 10, 11 and include, in parallel connection, associated with the
wheel brakes 18 to 21, each one preferably normally open, electromagnetically
operable inlet valve 47, 48, 53, 54, respectively, with each one non-return valve 49, 50,
55, 56. Further hydraulic lines 69, 71 are connected to the individual wheel brake pairs
18, 19 and 20, 21, respectively, to permit a connection between the wheel brake pairs
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Last modified: November 3, 2007