Fuel and ignition control
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United States of America Patent
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-
Jul 10, 1984
Issued Date -
N/A
app pub date -
Aug 1, 1983
filing date -
Sep 28, 1981
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A fuel and ignition control for a pulse combustion furnace includes both analog and digital timing means for fail safe operation, fuel valve control means which depend on proper cyclic operation for proper function, and flame detection means which are fail safe due to the necessity of its components providing a critical phase shift angle. The fuel control valve means includes energy storage means which is stepwise depleted to positively limit the time of valve energization in the absence of detection of flame, and is also disabled after a predetermined time by the digital timing means.
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