Pressure monitoring system

Details Pressure monitoring system Pressure monitoring system

1996-08-27

1997-05-20

Hofsass, Jeffery A.

Communications: electrical

Condition responsive indicating system

Specific condition

340626, 116168, 138 30, 73 40, 73121, G08B 2100

Patent

active

056316321

ABSTRACT:
The invention is directed to a pressure monitoring system for monitoring a hydraulic pressure which is supplied from a fluid pump and accumulated in an accumulator. The pressure monitoring system includes an electric motor which drives the fluid pump to supply the hydraulic pressure in substantially linear proportion to a current fed to the motor, a current detection device which detects the current fed to the motor, and a pressure estimation device which estimates the hydraulic pressure accumulated in the accumulator in response to the current detected by the current detection device. A malfunction detection device may be provided for detecting a malfunction on the basis of the output of the pressure estimation device.

REFERENCES:
patent: 4800367 (1989-01-01), Klintenstedt et al.
patent: 4801247 (1989-01-01), Hashimoto et al.
patent: 5004264 (1991-04-01), Kozaki et al.
patent: 5461903 (1995-10-01), Harms
patent: 5577812 (1996-11-01), Hirano et al.
Toyota Soarer 1991 Model Service Manual, Toyota Motor Corporation, pp. 3-150 through 3-152, May 1991.

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