Patent ID: 7631494

Claim:
A method of operating a hydrostatic transmission of a hydrostatic-mechanical power distribution transmission comprising high-pressure limiting valves which enable an actual working pressure to exceed a working pressure limit, set as a maximum pressure during a constant load of the hydrostatic transmission, and at least one high-pressure sensor communicating with a hydrostatic-mechanical power distribution transmission control, the method comprising the steps of: measuring, via the at least one high-pressure sensor, the actual working pressure in the hydrostatic transmission during power distribution; asymptotically approximating the hydrostatic transmission to the maximum pressure; increasing the actual working pressure, via the power distribution transmission control which communicates with the at least one high-pressure sensor, during a high-pressure phase for a short defined time interval such that the actual working pressure is greater than the working pressure limit set as the maximum pressure during the constant load of the hydrostatic transmission; after each high-pressure phase, decreasing the actual working pressure during a recovery phase such that the actual working pressure is lower than the maximum pressure, and monitoring the recovery phase via a timer and taking into consideration the actual working pressure in the hydrostatic transmission as measured by the at least one high-pressure sensor; and after termination of the recovery phase, initiating a high-pressure restoring phase.