Patent ID: 6213758
Filing Date: 2001-04-10
Classification: F23N

Abstract:
A control system for controlling the air to fuel ratio in a burner firing into a firing chamber, said burner having a combustible fuel chamber and an air chamber, said control system comprising:fuel differential pressure sensing means for measuring the pressure differential between said combustible fuel chamber and said firing chamber and generating a first signal indicative of said measurement;air differential pressure sensing means for measuring the pressure differential between said air chamber and said firing chamber and generating a second signal indicative of said measurement;fuel flow control means for controlling the flow of fuel to said fuel chamber of said burner;air flow control means for controlling the flow of air to said air chamber of said burner; andcontrol means responsively coupled to said fuel differential pressure sensing means, to said air differential pressure sensing means and to said fuel and air flow control means, said control means comparing said first and second signals to predetermined respective non-linear values, and maintaining the ratio of said combustible fuel and said air being fed to said burner based upon said comparison.