Apparatus and method for controlling duty solenoid valves

Details Apparatus and method for controlling duty solenoid valves Apparatus and method for controlling duty solenoid valves

1995-06-16

1997-07-15

Lee, Kevin

Fluid handling

Processes

25112905, 361154, F16K 3106, H01H 4704

Patent

active

056473877

ABSTRACT:
A duty solenoid valve control apparatus and a duty solenoid valve control method, in which a plurality of duty solenoid valves different in operation from each other are controlled without increase of the program capacity of a computer. The apparatus comprises a duty signal generating device for generating a duty signal corresponding to a time ratio, an overexcitation signal generating device for generating an overexcitation signal to overexcite a solenoid coil, a holding signal generating device for generating a holding signal to hold a duty solenoid valve, and a signal synthesizing device for synthesizing the duty signal, the overexcitation signal and the holding signal into a drive signal for driving the solenoid coil.

REFERENCES:
patent: 5202813 (1993-04-01), Uota et al.
patent: 5508906 (1996-04-01), Nelli et al.
patent: 5574617 (1996-11-01), Shimanuki et al.

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