Hydraulic pressure control apparatus having device for estimatin

Details Hydraulic pressure control apparatus having device for estimatin Hydraulic pressure control apparatus having device for estimatin

1996-04-02

1997-11-04

Butler, Douglas C.

Fluid-pressure and analogous brake systems

With pump

3031135, 3031161, 303166, 303DIG4, 30312213, B60T 832

Patent

active

056831498

ABSTRACT:
A vehicle brake cylinder pressure control apparatus wherein an amount of fluid flow into a reservoir is estimated based on vehicle deceleration and a pressure reducing time of the brake cylinder, while an amount of fluid flow from the reservoir is estimated based on a pumping time during which the fluid is pumped up from the reservoir by a pump, and the vehicle deceleration or an operating speed of a pump motor, so that an amount of the fluid stored in the reservoir is estimated on the basis of the amounts of the flow flows into and from the reservoir. Various parameters may be used in place of the vehicle deceleration, pumping time and motor operating speed, for estimating the amounts of the fluid flow into and from the reservoir and the reservoir fluid amount.

REFERENCES:
patent: 5558414 (1996-09-01), Kubota

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