Method for controlling gear-shifting processes of a...

Details Method for controlling gear-shifting processes of a... Method for controlling gear-shifting processes of a...

2008-05-06

2008-05-06

Lewis, Tisha (Department: 3681)

Interrelated power delivery controls, including engine control

Clutch control

Engine controlled by clutch control

C477S174000

Reexamination Certificate

active

10907409

ABSTRACT:
A method for controlling gear-shifting processes of a powershift gearbox which can be coupled to a drive motor and has gear steps including two friction clutches and a plurality of clutches, and at least one gearbox actuator for actuating the gear steps. The method includes the following steps: the torque of the drive motor is received by the new friction clutch associated with the new gear step to be engaged; before the disengagement of the old gear step and before or during the torque reception, a pre-determined pre-tensioning force is applied to the clutch of the old gear step by the gearbox actuator; and the old gear step is disengaged when the motor torque and the clutch torque are balanced.

REFERENCES:
patent: 2003/0054920 (2003-03-01), Berger et al.
patent: 4204401 (1993-08-01), None
patent: 1122116 (2001-08-01), None
patent: 1072820 (2004-12-01), None
patent: WO 2004/033246 (2004-04-01), None

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