| 摘要 |
The invention relates to a method for controlling an automatic or automated shift system, for example for shifting a multi-step transmission, having a control unit (22), one or more shift cylinders (10, 12) which can be activated by pressure medium by means of assigned shift valves (14, 16, 18, 20), and at least one main shift valve (4, 6) which is arranged upstream of the shift valves, wherein the demand for pressure medium for shift processes to be carried out is determined and the respective main deactivation valves (4, 6) are actuated as a function thereof. According to the invention, pressure medium demand values are stored for all conceivable shift scenarios or shift times derived therefrom for the main deactivation valves (4, 6) in the control unit (22). When a shift command is initiated, they are retrieved and the shift system is already sufficiently filled by opening the main deactivation valves (4, 6) before a dip in pressure, in order to ensure the necessary pressure in the shift cylinders (10, 12). |
