| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide an automatic boosting device and method for a hydraulic travel device which enhance travelling force or tractive force by changing the relief pressure in a circuit when an operation device with a heavy equipment doesn't work. SOLUTION: The automatic boosting device for a hydraulic travel device is provided with a first pressure switch 30 for detecting pressure of a first pilot line 13a in a first control valve 12, a second pressure switch 32 for detecting pressure of a second pilot line 13b in the second control valve 16, a control machine 34 for judging right or wrong of the boosting of the maximum allowable pressure in the hydraulic pressure circuit after receiving a signal from the first pressure switch 30 and the second pressure switch 32, and a solenoid valve 36 for changing the maximum allowable pressure of a relief valve 20 into pressure corresponding to the signal from the control machine 34.</p> |
