| 摘要 |
PROBLEM TO BE SOLVED: To enable smooth steering operation by ensuring sufficient amount of pressure oil when composite operation composed of steering operation and other actuator operation is done when an engine rotates at a low speed in an asphalt finisher. SOLUTION: In a hydraulic controller 1 of the asphalt finisher, an engine revolution number detection sensor 18 is provided and is connected with a controller 19, which is connected with left and right leveling cylinders 8, 9 and actuator operation detection means of hopper opening and closing cylinders 12, 13 and screw drift cylinders 16, 17. When it is detected that a value detected by the engine revolution number detection sensor 18 is less than a predetermined value and any of actuators is in an operation condition during steering operation by a steering cylinder 5, a command signal is transmitted to a throttle motor 36 by the controller 19 to increase the number of revolutions of the engine 2.
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