Fluid-pressure and analogous brake systems – With pump
Patent
1990-11-20
1993-06-29
Graham, Matthew C.
Fluid-pressure and analogous brake systems
With pump
303 962, 3031135, B60J 834
Patent
active
052227871
ABSTRACT:
A braking system (8) comprising: a master cylinder (10); rear brakes (12a,b) communicated to the master cylinder (10); front brakes (14a,b) hydraulically isolated from the rear brakes; an isolation valve (16; 16') interposing the master cylinder (10) and the front brakes (14a,b) having a first state communicating the master cylinder to the front brakes and a second state isolating the master from the front brakes and connecting a pump (42) to the front brakes; a motor (44) for powering the pump (42); a reservoir (54) communicated to an inlet of the pump (42); a control unit (40) for causing front brake pressure to follow rear brake pressure comprising: a first pressure sensor (30) for generating a signal indicative of rear brake pressure; electric proportioning device (94) for generating a commanded front brake pressure signal (P.sub.C); a second pressure sensor (32) for generating a signal of actual front brake pressure (P.sub.A); a comparator (96) for comparing the command brake pressure signal to the actual brake pressure signal and for generating an error signal (P.sub.E); a motor control circuit responsive to an error signal for activating the motor and for powering the pump (42).
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Eddy William C.
Towers Kenneth S.
Allied-Signal Inc.
Graham Matthew C.
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