High efficiency fuel injection system for gas appliances

Abstract

A unique control system is provided for fuel injection gas appliances to achieve efficient combustion by controlling the proportion of fuel and air variables. The combustion control system provides active feedback control of the combustion event and includes at least one detection sensor e.g. CO 2 CO sensor and O 2 , to trigger the modulation of a gas valve to adjust pressure and gas flow to the combustion chamber of a gas appliance. A processor receives the concentration signal from the detection sensor to generate a proportionate control signal to modulate a pressure regulator of the gas valve thereby to control future combustion events to achieve maximum fuel combustion efficiency. Accordingly, the injection system varies the proportion of air to fuel inflow to a prescribed optimum range achieving efficient fuel combustion.

1 . A high efficiency fuel injection system for gas appliances, the system comprising in combination: 
 a) means for qualitative and quantitative sampling of combustion exhaust gas from a appliance;    b) sensor means for detecting the concentration of a component selected from the group consisting of carbon dioxide, carbon monoxide and/or oxygen and combinations thereof present in the combustion exhaust gas;    c) means converting the detected concentration of said component to a digital value signal for relay to a central processor unit;    d) means for comparing the carbon dioxide concentration value signal with a stored desired concentration value;    e) means for continuously entering the digital value signal into a computer and comparing the value signal with the desired concentration value;    f) means for converting the digitized values to calibrated values;    g) means for calculating the desired air flow for optimum combustion efficiency from the calibrated value;    h) means for directing the signal derived from the computer to a regulator valve for adjusting the concentration of fuel and air for future combustion.