| 摘要 |
<p>PURPOSE:To improve operating feeling and working efficiency by controlling an electronic governor control device for maintaining rotating speed of an engine at a constant level and a car speed transmission mechanism for gear shift-controlling car speed according to working load condition so as to maintain engine rotational speed at a constant level. CONSTITUTION:At the time of running working when an automatic switch 64, a main clutch switch 66 and an implanting switch 67 are turned on respectively, and at the time of light load working when the difference between a rotary command value which is set by the setter 62 of an electronic governor control device 56 and a detecting value detected by the rotary sensor 58 of an engine 2 is in a setting value or less, the command value is maintained by means of governor control in a governor control unit 63 so as to control rotational speed of the engine 2 at a constant level. At the time of heavy load working when the difference between a command value of condition in which rotational speed of the engine 2 can be not controlled by the electronic governor control device 56 and the detection value is the set value and more, deceleration speed control is carried out until the difference becomes the set value so as to maintain the rotational speed of the engine 2 at a constant level.</p> |
