| 摘要 |
In an operating state of the automatic transmission in which a translation ratio is engaged and no shifting occurs, an isolating valve (1) is in a first shift position, in which at least the torque-transferring shifting element (K) is tightly sealed from the rest of the hydraulic system by the isolating valve (1), such that the actuating pressure (p_K) enclosed in the shifting element (K) remains essentially constant and does not lower. According to the invention, the isolating valve (1) is designed and arranged in the hydraulic system such that it is held by the force of a blocking pressure (p_S) generated by the pump (P) in the first shift position and, at standstill of the pump (P) upon falling short of a specified value of the pressure generated by the pump (P), the isolating valve (1) can be moved automatically by the effect of the blocked shifting element pressure (p_K) into a second shift position, in which the respective shifting element (K) is connected to the rest of the hydraulic system and the shifting element (K) is opened. |
