| 摘要 |
PURPOSE:To improve a speed keeping controllability by decreasing an engine load by a speed decreasing operation of a gear shifter prior to a speed keeping means when an engine speed decreases below a given value, and providing a decreasing means returning a number of revolution to a given value. CONSTITUTION:In a control device in which an electric motor 20 is controlled by a control mechanism B and the electric motor 20 as a driving mechanism automatically operates a hydraulic continuously variable transmission (illustrating exempted) in working vehicles of a passenger type lawn mower etc. via a gear shifting pedal 14, a speed keeping means 21 is provided to the control mechanism B and the means 21 outputs a control signal making a detected speed by the first sensor 17 to be conformable to a set speed by a keeping speed setting means 22. And a speed decrease means 24 operating a gear shifter to the speed decreasing side during from the time of an engine speed decrease to the time when the engine speed returns to a set engine speed in the case where the engine speed by the second sensor 18 decreases below the set engine speed by a revolution number setting means 23 due to a load variation. |
