High efficiency fuel injection system for gas appliances

Abstract

A unique control system is provided for optimizing and effecting efficient combustion of gas appliances by controlling the proportion of fuel and air variables. The control system provides continuous active feedback of the combustion event by detecting the level of exhaust gases such as CO 2 to trigger the modulation of a gas valve. Based upon the detected level, a control signal is generated by the system and received by a processor to adjust pressure and gas flow for future combustion events. Accordingly, the control system varies the proportion of air to fuel inflow to a prescribed optimum range thereby achieving efficient fuel combustion.

1 . A control system for optimizing and for effecting efficient combustion of fuel by a gas appliance, the system comprising in combination: 
 a) means for qualitative and quantitative determination of combustion exhaust gas from the gas appliance;    b) sensor means for detecting the concentration of carbon dioxide present in the combustion exhaust gas;    c) means converting the detected concentration of carbon dioxide to a digital detected value signal for relay to a central processor unit;    d) means for comparing the digital detected value signal with a prescribed range of optimum concentration values of carbon dioxide;    e) means for calculating a correction factor to detected value signal within the prescribed range of optimum concentration values; and converting the detected value signal to a prescribed value signal; and    f) means for directing the signal derived from step e) to a regulator valve for adjusting the concentration of fuel and air mixture for future combustion events.    
   
   
       2 . The control system for optimizing and for effecting efficient combustion as defined in  claim 1 , wherein the prescribed range of optimum concentration values of carbon dioxide is from about 6% to about 10%.  
   
   
       3 . The control system for optimizing and for effecting efficient combustion as defined in  claim 1 , wherein the prescribed range of optimum concentration values of carbon dioxide is from about 7.5% to about 8.0%.  
   
   
       4 . The control system for optimizing and for effecting efficient combustion as defined in  claim 1 , wherein the sensor means for detecting the concentration of carbon dioxide also comprises sensor means for detecting the concentration of carbon monoxide present in the combustion exhaust gas.  
   
   
       5 . The control system for optimizing and for effecting efficient combustion as defined in  claim 1 , wherein the sensor means for detecting the concentration of carbon dioxide also comprises sensor means for detecting the concentration of oxygen present in the combustion exhaust gas.  
   
   
       6 . The control system for optimizing and for effecting efficient combustion as defined in  claim 1 , wherein said means for comparing the digital detected value signal with a prescribed range of optimum concentration values performs the comparison intermittently over time.  
   
   
       7 . The control system for optimizing and for effecting efficient combustion as defined in  claim 1 , wherein said means for comparing the digital detected value signal with a prescribed range of optimum concentration values performs the comparison on an continuous basis.