| 摘要 |
PURPOSE:To improve response and to obtain the optimum burning condition in a combustion equipment, by correcting a set target value of oxygen consentration by an actually measured concentration of unburned gas and an actually measured fuel flow rate. CONSTITUTION:The oxygen concentration in exhaust gas and that in unburned gas actually measured by an unburned gas concentration detector 11 are linearized and converted into electric current by a converter 12, and are put into an air-fuel ratio controller 13. On the other hand, a set target value of oxygen concentration O2S1, a correction value O2S2 which is determined from an actually measured concentration of unburned gas, and a correction value O2S3 which is determined from an actually measured fuel flow rate, are processed in an adder 14, and the result is also put into the air-fuel ratio controller 13 as a target value of oxygen concentration O2S. The air- fuel ratio controller 13 puts out the air-fuel ratio of which difference between the target value of oxygen concentration O2S and the actually measured oxygen concentration is small, and the output is put into an air-fuel ratio multiplier 7. By this method, the target value of oxygen concentration is automatically controlled to the optimum value, and the response is improved, so that the optimum burning condition can be obtained in a combustion equipment all the time. |
