Amplifying system for solenoid controlled proportion valve
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United States of America Patent
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Jun 17, 1997
Grant Date -
N/A
app pub date -
Apr 18, 1994
filing date -
Apr 16, 1993
priority date (Note) -
Expired
status (Latency Note)
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Abstract
This invention is concerned with an amplifying system with a microprocessor which makes it possible to adjust parameters easily with a simple construction and to perform automatically a simple repeating work without manual operation. The system is also provided with a safety mechanism to prevent system errors, an alarm unit and a display unit to indicate errorneous operations and a failure diagnosis means to detect failure. The microprocessor of the amplifying system operates at least one solenoid proportion valve by producing a control signal consisting either of dither signals of a triangular wave or of pulse signals of a variable duty cycle.
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