Method and apparatus for testing a valve actuated by an electrom

Details Method and apparatus for testing a valve actuated by an electrom Method and apparatus for testing a valve actuated by an electrom

1993-11-17

1996-02-20

Strecker, Gerard R.

Measuring and testing

Blower, pump, and hydraulic equipment

73 1B, 7386268, 137551, 324202, 324415, 36457104, G01R 3100, G01R 1900, G01L 100, F16K 3700

Patent

active

054920094

ABSTRACT:
A method for testing a valve being driven by an electromagnet having a electromagnet armature, includes determining a value of current in the electromagnet as a response current, at an instant when motion of the electromagnet armature of the valve begins during a switching action of the valve. A force acting through the electromagnet upon the electromagnet armature is determined from the determined response current, at the instant when motion of the electromagnet armature begins, by means of a calibration function, as a response force and as a standard for the condition of the valve. An apparatus for testing a valve being driven by an electromagnetic having a electromagnet armature and an electrical circuit, includes a current meter in the electrical circuit of the electromagnet. A computer is connected to the current meter. A memory for a calibration function is connected to the computer for indicating a dependency of a force acting upon the electromagnet armature on a current in the electrical circuit of the electromagnet.

REFERENCES:
patent: 3988664 (1976-10-01), Beery et al.
patent: 4319193 (1982-03-01), Boccali et al.
patent: 4870364 (1989-09-01), Trox et al.
patent: 4990854 (1991-02-01), Friz
patent: 5182517 (1993-01-01), Thelen et al.
patent: 5256973 (1993-10-01), Thee et al.

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