Control system for the drive of a pto for an agricultural vehicle

In an agricultural tractor having a drive train operatively interconnecting an engine and a power take-off mechanism for providing operating power to a towed implement, said drive train including a CVT transmission providing power to said power take-off, the improvement comprising:

• a plurality of implement sensing devices mounted on said towed implement and located to measure operational variables critical to the interaction between said tractor and said implement;
• a control device for said power take-off mechanism located on said tractor and connected to said CVT transmission;
• a first electrical signal transmission device interconnecting said plurality of implement sensing devices and said control device, whereby input signals from said plurality of implement sensing devices are processed by said control device to generate output signals to said CVT transmission to optimize the operation of said implement and said CVT transmission;
• said CVT transmission employing hydraulic oil in a circuit to vary the internal pressures and output speeds;
• a plurality of transmission sensing devices associated with said CVT transmission and including a temperature sensor and a viscosity sensor, both in contact with said hydraulic oil;
• said temperature sensor and said viscosity sensor both electronically connected to said control device such that said control device can vary the speed of said CVT transmission in response thereto.