| 摘要 |
PROBLEM TO BE SOLVED: To eliminate an individual difference of an air volume transfer delay time of an air volume adjusting means of each product and to easily change supply amounts of an air volume and a fuel in the same manner by calculating an adjusting degree of the air volume adjusting means based on a time required to switch the adjusting means, and controlling the fuel supply amount based on this calculated value. SOLUTION: A time up to when a restricted current value of a torque motor of a driver of a damper 4 becomes a restricted current again restricted upon outputting of an inverted signal from a controller 13, that is, a time required to switch the damper 4 is stored in the controller 13. In the case of a product having an individual difference, the time required to switch the damper 4 stored in the controller 13 is detected, an adjusting degree of the damper 4 is calculated based on the detected value, and a signal for opening a high combustion valve 11 is output from the controller 13 by delaying a transfer timing time based on the calculated value. Thus, when the damper 4 is switched, an individual difference of products of the air volumes is eliminated, and the same switching set air volumes are obtained.
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