| 摘要 |
PURPOSE:To quicken the engine reset operation when starting work after releasing deceleration, by producing a rotation command signal for decelerating an engine with correspondence to the engine rotation at the time when it is decided to be work stop condition then lowering the engine rotation on the basis of said signal. CONSTITUTION:Upon supply of pressure oil from a hydraulic pump 20 through a solenoid valve 19 to a deceleration cylinder 18, an automatic decelerator will move piston rod18a to the right against a spring 18b thus to control a governor 16 through control lever 14 irrespectively of the operating amount of fuel regulation lever 10 and to lower the engine rotation to predetermined level for deceleration. The solenoid valve 19 is controlled through a controller 23. Upon detection of work stop condition on the basis of the outputs from the grip sensors 21a, 22a of operating levers 21, 22, the controller 23 will read out the engine rotation for deceleration from a memory 27 on the basis of the engine rotation to b detected through a rotary sensor 26 thus to control the solenoid valve 19. |
