| 摘要 |
A tractor control system comprises an engine 26 drivingly connected, via drive shaft 28 and PTO clutch 32, to a PTO stub 30, and an electronic control unit or ECU 42 for receiving a maximum PTO torque value. A driving torque delivered to the PTO stub is limited to the maximum PTO torque value to provide overload protection to the PTO shaft 22 and implement 12. Two speed sensors 38, 40 are placed adjacent the drive shaft 28 in either side of the PTO clutch 32, the signals from which are transmitted to the ECU 42. The ECU 42 then controls the pressure delivered to the PTO clutch 32 via pressure controller 36, there being a potentiometer with a dial 44 which enables a driver to preselect a maximum PTO torque value which is dependent on the implement 12 attached.
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