Boots – shoes – and leggings
Patent
1981-02-17
1983-11-08
Truhe, J. V.
Boots, shoes, and leggings
303104, 303 97, 303 95, G06F 1520
Patent
active
044146302
ABSTRACT:
In an anti-skid vehicle braking system an electronic control unit is arranged to control the operation of an anti-skid valve assembly for modulating the fluid pressure applied to a brake actuator. A wheel speed sensor measures the speed of a braked wheel and produces a signal which is converted into a deceleration signal by a conditioning circuit and a differentiator and compared in a comparator with a deceleration threshold value. A pressure sensor provides a pressure signal corresponding to the current brake actuator pressure and a pressure signal conditioning circuit modifies the pressure signal to take account of a load signal produced by a load sensor which measures the loading of the braked wheel. The deceleration threshold value is produced by modulation of a constant threshold value in a threshold generator circuit and a threshold modulator circuit in response to the modified pressure signal. The threshold value is varied in response to the current pressure signal in accordance with a predetermined relationship between the threshold value and the brake actuator pressure, with a higher threshold value being provided for a higher actuator pressure. When the system is applied to the brakes of a low inertia axle, an over-ride circuit is included to provide a signal which over-rides the pressure signal for an initial period when the brake is applied as detected by a brake lamp switch.
REFERENCES:
patent: 3718374 (1973-02-01), Ochia
patent: 3889128 (1975-06-01), Luhdorff
Harris Alan L.
White Alfred K.
Bergmann Saul M.
Lucas Industries Limited
Truhe J. V.
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