| 主权项 |
1. A method for operating a transmission device including plural gear selectors, each having a gear selector piston operatively connected to a shifting fork of the transmission device and arranged in a gear selector cylinder to divide the gear selector cylinder into first and second pressure chambers, a gear selector valve movable to a first shift position in which the first pressure chamber is in flow connection to a common feed line, a second shift position in which the second pressure chamber is in flow connection to the common feed line, and a neutral position in which none of the pressure chambers has a flow connection to the common feed line, and a shifting valve movable to a first operating position in which the feed line is in flow connection to a common pressure source, and a second operating position in which the flow connection between the feed line and the common pressure source is cut, said method comprising:
executing a pressure test when switching from a standby mode in which the gear selector valve assumes the neutral position, to a power saving mode in which at least a plurality of the gear selector valves of the gear selectors are de-energized, said pressure test comprising:
activating the gear selector valves of the gear selectors to assume their neutral position,activating the shifting valve to assume the second operating position,subsequently activating the gear selector valve of at least one of the gear selectors to assume one of the shift positions,determining a position of the gear selector piston of the at least one of the gear selectors by a detection device over a specific time period, andrecognizing the presence of a malfunction of the shifting valve when the position of the gear selector piston changes during the specific time period. |
