| 摘要 |
PURPOSE:To improve the followability of the control by obtaining a target control signal value from a difference between a detection temperature and a set temperature and making the maximum change width within a predetermined period of time variable by the quantity of combustion. CONSTITUTION:A voltage from a temperature detection circuit 1 is subjected to a proportional control P, a differentiation control D, and two-step differentiation control D<2> by means of a first control circuit 6, and a control voltage is output. Further, a second control circuit 7 outputs an integration control signal I, and is reversed by an arithmetic amplifier 8 and fed back to an output point A of the first control circuit 6 via the normal direction of a diode 11. The output of the second control circuit 7 is fed back to the output point A of the first control circuit 6 via the reverse direction of a diode 12. By this construction, the maximum variation width of the control signal value is varied on the basis of the quantity of combustion, and the quantity of combustion can be varied in the maximum width where no poor combustion is produced, thus improving the followability of the control. |
