Hydraulic control device for an automatic transmission

A hydraulic control device for an automatic transmission, the automatic transmission comprising a plurality of shifting elements for selective torque transfer, each shifting element of the plurality of shifting elements having shifting element cylinder, the hydraulic control device comprising:

• a first pressure adjusting device operable to supply fluid at a supply pressure to the shifting element cylinder of each shifting element of the plurality of shifting elements;
• a second pressure adjusting device;
• and
• a shut-off valve arranged between the first pressure adjusting device and a respective shifting element cylinder of the plurality of shifting elements, the shut-off valve hydraulically actuatable with by a control pressure from the second pressure adjusting device into at least a first shifting position and a second shifting position,
• wherein, in the first shifting position of the shut-off valve, the first pressure adjusting device is hydraulically connected to the respective shifting element cylinder through the shut-off valve such that the supply pressure is equal to a shifting element pressure in the respective shifting element cylinder,
• wherein, in the second shifting position of the shut-off valve, the shifting element cylinder is sealed by the shut-off valve relative to the first pressure adjusting device such that the shifting element pressure in the respective shifting element cylinder is held above a certain value when the supply pressure from the first pressure adjusting device is less than the shifting element pressure in the respective shifting element cylinder, and
• wherein the shut-off valve is a releasable check valve, the releasable check valve comprising a check valve and an unblocking device, the unblocking device actuatable by the control pressure from the second pressure adjusting device.