A method for controlling of the jerking motions in a final control element of an electrohydraulically controlled motor vehicle transmission

摘要

The invention relates to a method for control of the jerking motions in adjusting members of an electrohydraulically controlled transmission of a motor vehicle with a drive unit during the gearstep change of a walking speed ratio gear ratio coming to a;the switching pressure, by a switching valve is provided in that the control elements selectively by means of the switching valve entwede be connected with a pressure sink, in order to derive hydraulic fluid from the respective control element, or with a pressure line are connected, in order to introduce hydraulic medium in the actuator and thus, the final control element with the hydraulic medium in a first filling phase and to fill in a subsequent operating phase by further supply of pressurized fluid to actuate.The invention comprises the following steps:- in the presence of a to a signal indicative of gearstep change, the current from the engine torque that can be given off is detected at least indirectly;- from the torque, a desired value for a start pressure of the shift of the actuator the next gear stage, are determined, wherein the start of pressure of the pressure in the control element at the end of the filling phase and at the beginning of the operating phase is.