| 摘要 |
PURPOSE:To suppress the shock when an actuator is started or minutely operated, by controlling the pushing-away capacity varying member of a hydraulic pump, at the max, set speed which increases as the absolute value of the operation signal increases. CONSTITUTION:When an operating lever 14 is sharply operated to the full positive side, the operation signal XL sharply increases up to the signal XLmax. The max. speed signal alphalmin is output with in the range in which the operation signal XL is small, and as the operation signal XL increases, the speed signal alphal which increases in proportion to the increased operation sigal XL is output, and when the operation signal XL veaches the its max. Level, the max alphalmax is output. Therefore, the inclination speed of a swash plate 8 reduces and the acceleration speed of an actuator 6 is kept small, when the operation is started, so the shock in case when the actuator 6 is started is small. |
