| 摘要 |
PURPOSE:To make a stable combustion and enable a restriction of generation of nitrogen oxide gas to be carried out by a method wherein a calculater is provided to be connected to a generator for producing a signal of opening direction and another signal of closing direction, correcting a difference in opening and closing directions and outputting a signal to a driving motor for dynamic vanes of an air register. CONSTITUTION:An instruction signal for increasing a degree of opening from its zero state to 30%, for example, is inputted to a degree of opening setting unit 1. A discriminator 2 may discriminate an opening direction. In this case, an opening direction signal generator 3 produces a reference value, and a program signal produced by the opening direction signal generator 3 passes through a calculator 5 and is sent to a motor 7. A degree of opening of a dynamic vane 6 of an air register shows 30% in an opening direction. When an instruction for changing a degree of opening from this state to 20% for example is inputted to a degree of opening setting unit 1, the direction discriminator 2 discriminates it as a closing direction. Then, a closing direction program is inputted to the calculator 5. A correction circuit is formed between a closing direction program signal generator 4 and the calculator 5 and a program signal that is always similar to the reference value is sent to a motor 7. Its hysteresis is automatically corrected. |
