| 摘要 |
PURPOSE:To aim at smooth speed change and start-up by decreasing gradually the automatically controlled clutch operating force when the artificially controlled clutch operating force is added in a device such that the contact break of a clutch at the time of speed change operation can be controlled either automatically or artificially. CONSTITUTION:In a tructor, the torque of an engine 1 is transmitted to a driving wheel 4 through a main clutch 7 and a main and a sub transmission gears 2, 3 as well as transmitted to each driving part of an operating device 6 through a PTO clutch 8 and a PTO transmission gear 5. The main clutch 7 is controlled by means of the clutch control device in a control box 17. In the clutch control device, the main clutch 7 is contact broken by means of a cylinder E when the transmission gear shift of the main and sub transmission gears 2, 3 is specified. On the other hand, when the footing of a clutch pedal 15 is detected by means of a clutch operating switch while this automatic control is performed, the clutch control device is constructed such as to enable to stop the contact break operation of the main clutch 7 gradually. |
