Failure detection system for hydraulic pumps

Details Failure detection system for hydraulic pumps Failure detection system for hydraulic pumps

1984-07-26

1985-12-17

Yasich, Daniel M.

Measuring and testing

Blower, pump, and hydraulic equipment

417 63, G01M 1900

Patent

active

045585938

ABSTRACT:
A failure detection system for hydraulic pumps each having displacement varying means. The system includes displacement command generating means for generating a command value for causing the displacement varying means of one of the pumps to be displaced a predetermined amount, sensor means for sensing the amount of a displacement of the displacement varying means, comparator means for comparing the absolute value of the difference between a command value generated by the displacement command generating means and the amount of the displacement sensed by the sensor means with a predetermined allowable value, and output means for outputting a failure signal for indicating that the pump is out of order when it is found by the comparator means that the allowable value has been exceeded by the absolute value.

REFERENCES:
patent: 4171638 (1979-10-01), Coman et al.
patent: 4368638 (1983-01-01), Groves et al.
patent: 4464931 (1984-08-01), Hendrick

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