Patent ID: 6132012
Filing Date: 2000-10-17
Classification: B60T,F04B

Abstract:
An abnormal condition detecting apparatus for a hydraulic brake boosting system arranged such that hydraulic pressure in an accumulator accumulated by a pump is used to boost the operation of a brake operation member so as to generate braking force, said apparatus comprising:pressure-gradient calculating means for calculating a gradient of the pressure rise which is changed in the rise in pressure discharged from a pump or hydraulic pressure in an accumulator in a predetermined time during the operation of the pump; and alarm-signal generating means for transmitting, to an alarm unit, an alarm signal when the gradient of the pressure rise is smaller than a predetermined set value, wherein when the gradient of the pressure rise in the pressure discharged from the pump is smaller than the set value during the operation of the pump, a determination is made that an abnormal condition has been encountered, and wherein said determination of an abnormal condition is inhibited during a braking operation.