Device for presuming accumulator pressure operative with pressur

Details Device for presuming accumulator pressure operative with pressur Device for presuming accumulator pressure operative with pressur

1998-10-02

2000-07-25

Graham, Matthew C.

Fluid-pressure and analogous brake systems

Speed-controlled

Having a valve system responsive to a wheel lock signal

303 11, B60T 1318

Patent

active

060928786

ABSTRACT:
In a device for presuming pressure of a pressure accumulator prepared for accumulating a fluid under a compression of an elastic pressurization medium to selectively supply the fluid therefrom at a raised pressure with a timely supplement of the fluid thereto by a pump, the device has a first pressure switch for detecting a first predetermined pressure level of the accumulator and a second pressure switch for detecting a second predetermined pressure level of the accumulator higher than the first pressure level, and a pressure increase gradient is calculated based upon the difference between the first and second pressure levels and the time duration lapsed for pumping up the pressure from the first pressure level to the second pressure level.

REFERENCES:
patent: 3794845 (1974-02-01), Riddoch
patent: 4699435 (1987-10-01), Wupper
patent: 4831532 (1989-05-01), Kondo
patent: 4841158 (1989-06-01), Latka
patent: 4848847 (1989-07-01), Reinartz et al.
patent: 4900105 (1990-02-01), Burgdorf et al.
patent: 5631632 (1997-05-01), Nakashima et al.
patent: 5695260 (1997-12-01), Tanaka et al.
patent: 5961189 (1999-10-01), Lutteke et al.

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