A process for the prevention of the air being sucked in from the oil sump in the case of a cold start of an automatic transmission

摘要

In the context of the method for the prevention of the air being sucked in from the oil sump in the case of a cold start of an automatic transmission of a motor vehicle comprising a hydrodynamic converter without the minimum oil quantity to be increased, whereby the required main oil pressure on the basis of the turbines and the torque transmitting capacity of the weakest switching element is determined in the respective gear, the main oil pressure by means of temperature-dependent via transmission characteristic fields of the switching elements during a cold start is corrected and / or, in particular, for temperatures below a predetermined limit value of the main oil pressure, by means of a temperature-dependent converter amplification characteristic curve is corrected, wherein for this purpose the of a converter temperature model is used for the calculated temperature.