Patent ID: 7318788

Claim:
An automatic gearshift procedure for a vehicle with engaged clutch-dependent power take-off ( 32 ) when the vehicle is in motion, which power take-off ( 32 ) is driven by an engine ( 1 ), arranged in the vehicle, via a disk clutch ( 3 ) which in turn is coupled to an automatic stage-geared gearbox ( 9 ) in which at least one intermediate shaft ( 11 ) used for driving the power take-off ( 32 ) is arranged, and where the gearbox ( 9 ) and the engine ( 1 ) are controlled by at least one control unit ( 45 ), said gearshift procedure comprising: while maintaining engagement of the clutch-dependent power take-off ( 32 ), controlling the torque of the engine ( 1 ) via the control unit ( 45 ) so that the main shaft ( 10 ) of the gearbox ( 9 ) becomes substantially torqueless; using the control unit ( 45 ) to put the gearbox ( 9 ) in neutral position so that the intermediate shaft ( 11 ) of the gearbox ( 9 ) is disengaged from the driving wheels of the vehicle; using the control unit ( 45 ) to control the speed of the engine ( 1 ) to synchronous speed with regard to the new gear; and engaging the new gear using the control unit ( 45 ).