PURPOSE: To provide the title method comprising determining the flow rate of a fuel gas and air fed to each combustion chamber by calculation without providing the chambers with flow meters and appropriately controlling the air-fuel ratio of the combustion chamber according to the determined flow rates.
CONSTITUTION: The flow rate of a fuel gas fed to each combustion chamber and that of air fed to the chamber are determined by calculation to determine the air-fuel ratio A/G(i), to which is made compensation for calorie change, waste gas O2 content and nonburning prevention to calculate the target value AGx(i). The target value of air flow rate is determined from the determined volume of gas feed VG2(i) and AGx(i), and the target values of the air flow rate and fuel gas flow rate are converted into the degrees of opening of the cocks by calculation.
TANAKA KEIHACHIRO
NAGANUMA YOICHI
YAMAMOTO YASUNORI
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