| 摘要 |
<p>PURPOSE:To reduce the wear of an actuator by carrying out speed control, if the condition, in which the speed deviation of the detected speed from the set speed does not exceed a prescribed setting range, continues for a given time, only when a further narrower setting range is exceeded. CONSTITUTION:The speed No detected 5 from an engine 4 is compared with the preset speed Ni, and when the deviation is larger than the first set value S1, a control unit 1 outputs to control a fuel valve 3 via an actuator 2. If the time in which the speed does not exceed a set value S2 smaller than the first set value S1 continues for a given time, only when a set value S3 further narrower than the set value S2 is exceeded, the control unit 1 controls the fuel valve 3 via an actuator 2. Thus, the number of operation of the actuator 2 is reduced, and the wear of bearings in the actuator 2 can be prevented to prolong the life of bearing greatly.</p> |
