Apparatus for controlling hydraulic pressure to be applied to ef

Details Apparatus for controlling hydraulic pressure to be applied to ef Apparatus for controlling hydraulic pressure to be applied to ef

1987-09-11

1989-02-14

Laroche, Eugene R.

Boots, shoes, and leggings

303111, 303 95, 180197, B60T 864

Patent

active

048051047

ABSTRACT:
A wheel slipping control apparatus for controlling a braking hydraulic pressure to be applied to a wheel so as to perform an effective braking operation. The wheel slipping control apparatus comprises a control unit for generating a control signal in accordance with the wheel slipping state so as to perform a braking pressure control cycle so that the braking hydraulic pressure is set to a pressure decreasing mode and then to a pressure increasing mode. In the control unit, one of the braking pressure control cycles to be performed is determined as a learning control cycle to obtain a learning pressure-decreased value decremented in the learning control cycle and to obtain a learning pressure-increased value incremented in the learning control cycle. A present pressure-decreased value decremented in a control cycle after the learning control cycle is obtained to calculate a target pressure-increased value on the basis of the obtained learning pressure-decreased value and learning pressure-increased value whereby the braking hydraulic pressure is first increased to the vicinity of a wheel locking limit pressure after decreased in the pressure-decreasing mode.

REFERENCES:
patent: 3637264 (1972-01-01), Leiber et al.
patent: 4585280 (1986-04-01), Leiber
patent: 4660896 (1987-04-01), Matsuda
patent: 4749239 (1988-06-01), Onogi et al.

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