Solenoid valve failure detecting apparatus

Details Solenoid valve failure detecting apparatus Solenoid valve failure detecting apparatus

1991-06-28

1992-10-06

Harvey, Jack B.

Electricity: measuring and testing

Fault detecting in electric circuits and of electric components

Of individual circuit component or element

324418, 340644, G01R 3106, G01R 3132

Patent

active

051535220

ABSTRACT:
An apparatus for detecting a failure in a solenoid valve having an electrical winding electromagnetically coupled with a plunger. The failure detecting apparatus comprises a current sensor sensitive to a current through the electrical winding for producing a signal indicative of a sensed winding current. Changes in the sensed winding current indication signal with time are monitored to provide a failure signal which indicates a failure in the solenoid valve when no inflection point exists in the change of the sensed winding current indication signal for a predetermined period of time after power is supplied to the electrical winding.

REFERENCES:
patent: 4870364 (1989-09-01), Trox et al.

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