| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To control the maximum travel speed without reducing work efficiency during working and acceleration performance at travel start, suppress loss of engine output during control of the maximum travel speed, and improve fuel economy in a travel system of a working machine. <P>SOLUTION: Capacities of a first and a second hydraulic motor 23, 24 are cooperatively controlled and the minimum inclination rolling quantity of the hydraulic motor 24 is limited to limited inclination rolling quantity q2cmin during four speed transmission control process. When inclination rolling quantity of the first hydraulic motor 23 reaches the minimum inclination rolling quantity q1min, the maximum rotation speed of the engine 10 is limited to first limit rotation speed Ncmax1 (for instance 1800 rpm). <P>COPYRIGHT: (C)2009,JPO&INPIT</p> |
