| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a technology which prevents a rise of hydraulic pressure by stopping an engine, makes common in use a relief valve in which the setting of relief pressure is required at each working vehicle, and can reduce man-hours for confirming the relief pressure. <P>SOLUTION: When a difference (absolute value D) between a target rotation number Rs and an actual rotation number Rr reaches a threshold Dl or smaller, a control device 9 controls a speed change rate change means (hydraulic pressure actuator 31A) so that the actual rotation number Rr may reach the target rotation number Rs, and when the difference (absolute value D) between the target rotation number Rs and the actual rotation number Rr reaches a value larger than the threshold Dl, the control device stops the engine 2 by using an engine stop means 87. <P>COPYRIGHT: (C)2013,JPO&INPIT |
