| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a travel controller capable of reducing the number of pipe arrangements, capable of improving efficiency during steering operation by preventing understeering, and capable of stably carrying out travel correction control. <P>SOLUTION: In the travel controller, a short circuit oil passage 5A is arranged as a circuit short-circuiting a main line 4a in a circuit 1 for right traveling, and a main line 14a in a circuit 11 for left traveling. A first flow control valve 6 controlling a flow rate flowing from the main line 4a to the main line 14a, and a second flow control valve 16 controlling a flow rate flowing in an opposite direction to the first flow valve 6 are serially arranged as the short circuit oil passage 5A. In the flow control valves 6 and 16, a first check valve 9 and a second check valve 19 allowing flows in opposite directions to directions of controlling the flow rates by respective flow controls are respectively arranged in parallel to each other. By this, passage pressure losses can be reduced in the flow control valves 6 and 16 when they simply function as passages, and operability of steering operation can be improved. <P>COPYRIGHT: (C)2007,JPO&INPIT</p> |
