Fluid-pressure and analogous brake systems – Speed-controlled – Having a valve system responsive to a wheel lock signal
Patent
1970-04-02
1982-10-12
Frankfort, Charles E.
Fluid-pressure and analogous brake systems
Speed-controlled
Having a valve system responsive to a wheel lock signal
B60T 802, B60T 808
Patent
active
043536018
ABSTRACT:
A vehicle skid control braking system of the type that generates brake control signals varying in accordance with braking conditions, such as vehicle speed, wheel speed and road surface conditions. The system includes: (1) frequency converter apparatus that have pulse generating apparatus responsive to variable frequency wheel speed signals for producing a D.C. signal having a magnitude related to and varying with the frequency of the wheel speed signals; (2) wheel speed rate detector apparatus responsive to the D.C. signal for producing a first brake inhibit signal; (3) ramp generator apparatus responsive to the wheel speed signals for generating a vehicle velocity ramp signal proportional to vehicle speed; (4) pulse width detector apparatus responsive to the brake control signals for producing retarding force signals during the period that such brake control signals vary from a brake inhibit value to a normal brake value; (5) an automatically adjustable switching circuit apparatus or variable speed switching apparatus responsive to the brake control signals, the retarding force signals and the vehicle velocity ramp signals for producing a second brake inhibit signal; and (6) brake controller apparatus responsive to the first and second brake inhibit signals for generating the brake control signals.
REFERENCES:
patent: 3494671 (1970-02-01), Slavin et al.
patent: 3499689 (1970-03-01), Carp et al.
patent: 3524685 (1970-08-01), Harned et al.
patent: 3525553 (1970-08-01), Carp et al.
patent: 3544172 (1970-12-01), Howard et al.
patent: 3578819 (1971-05-01), Atkins
Comfort James T.
Frankfort Charles E.
Hiller William E.
Sharp Melvin
Texas Instruments Incorporated
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