| 摘要 |
PROBLEM TO BE SOLVED: To improve accuracy in draft sensing of a mixed lifting controller. SOLUTION: The lift controlling means is constituted to control lifting of the soil working implement (2) in such a way that a mixed value locates in a dead zone set by a position setting means (12), wherein the mixed value is obtained by respectively multiplying weight constants set by a draft ratio setting means (20) by a difference between detected traction load value by the draft detecting means (8) and the predetermined objective traction load value and a difference between detected position value and the predetermined position value, and adding obtained values, and the dead zone is constituted as variable according to the weight constant set by the draft ratio setting means (20). COPYRIGHT: (C)2008,JPO&INPIT
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