Electronic control arrangement for detecting a leak...

Details Electronic control arrangement for detecting a leak... Electronic control arrangement for detecting a leak...

G - Physics

05

D

341/19

G05D 23/19 (2006.01) F23N 5/12 (2006.01)

Patent

CA 1065446

ELECTRONIC CONTROL ARRANGEMENT FOR DETECTING A LEAK CONDITION FOR A VALVE Abstract of the Disclosure: A control arrangement for use in an automatic fuel ignition system for providing electronic detection of a leak condition for a pilot valve operable to supply fuel to a pilot outlet for ignition to establish pilot flame in- cludes a flame sensing circuit which effects operation of a main valve when a pilot flame is established, the flame sensing circuit maintaining the main valve deenergized when a pilot flame is established during an ignition interval and permitting a delay device to deenergize the pilot valve for a time to interrupt the supply of fuel to the pilot outlet to attempt to extinguish the pilot flame, and a time out de- vice operable to deactivate the system when the delay device fails to cause the pilot flame to be extinguished, the flame sensing means overriding the delay device and the timeout device when the pilot flame is established at the end of the ignition interval.

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