| 摘要 |
PURPOSE:To travel smoothly by immediately increasing front wheel driving force to a large value when a rear wheel slips and to avoid wasteful consumption of engine output when the rear wheel is not slipping. CONSTITUTION:When a rear wheel 3 is not slipping, displacement of a variable displacement hydraulic pump 15 is controlled to bring delivery pressure thereof to a low value, and when the rear wheel 3 is slipping, the displacement of the variable displacement hydraulic pump 15 is controlled to bring the delivery pressure thereof to a high value. Front wheel driving force is made small when the rear wheel 3 is not slipping, and is made large when the rear wheel 3 is slipping. |
