| 摘要 |
PURPOSE:To obtain a desired droop characteristic with a simple constitution, by comparing and operating the rotational number signal and the rotational number set signal of the engine and by feeding back the operation output to adjust the comparison input signal. CONSTITUTION:The rotational number of engine 12 is detected by magnetic pickup 16 arranged near gear 14 connected to the engine, and the rotation signal is output from rotational number detecting circuit 18 on a basis of this detection signal. This rotational signal is compared with the rotational number set signal from power source 22 by comparator 20, and the comparison result is led to operating circuit 24 having the proportional integrating function. The operation output of circuit 24 is not only input to actuator driving circuit 24 but also fed back to the input side of comparator 20 through variable resistance 42. Therefore, a forced deviation is generated between two inputs of comparator 20, and resistance 42 is adjusted to input the output of comparator 20 corresponding to a desired extent of deviation to circuit 24. Circuit 24 drives actuator 28 with the output corresponding to the extent of deviation, and the engine is controlled by accelerating lever 30, thereby giving a droop characteristic. |
