| 摘要 |
PURPOSE:To reduce fuel consumption and production of noise of an engine by associating the highest rotation of the engine with a control of a discharging amount from a hydraulic pump for travelling. CONSTITUTION:Upon treadling a pedal 25 in order to cause a vehicle to travel, pressure oil is fed into a pump controller 7 by an amount in accordance with the depth of the treadling of the pedal 25, and a discharging amount from a hydraulic pump 4 is controlled in proportion to the pressure of the pressure oil and at the same time, a limit switch 28 operates to cause a magnet valve 19 to be energized so that compressed air is fed into a cylinder 14 to push up a bearing face (b) of a lever 10. A control lever 3 is thereby moved to a highest rotation position to thereby render the engine 1 into its highest rotation. On the contrary, if the pedal 25 is released, the limit switch is turned off and accordingly, if a medium rotation switch and a stopping switch are turned off, magnet valves 18, 19, 20 are not energized so that respective cylinders 13, 14, 16 contract themselves to thereby bring the lever 3 to its idle position. If the medium speed switch is turned off, the magnet valve 18 is energized to thereby bring the lever 3 to its medium speed rotation position. |
