Abstract: A hydraulic supply apparatus for an automatic or automated transmission of a motor vehicle includes a high-pressure circuit which has a pressure accumulator and is supplied through the use of a high-pressure pump, a low-pressure circuit which is supplied through the use of a low-pressure pump, wherein the high-pressure pump and the low-pressure pump are driven by a common drive unit, and a valve which is provided downstream of the high-pressure pump. The valve has three switching positions, wherein a supply to the high-pressure circuit by the high-pressure pump is possible in the first switching position, and the output end of the high-pressure pump is connected to a reservoir or to the input end of the high-pressure pump in the second switching position. The high-pressure circuit is connected to the reservoir in the third switching position of the valve.

Abstract: A hydraulic supply apparatus for an automatic or automated transmission of a motor vehicle includes a high-pressure circuit which has a pressure accumulator and is supplied through the use of a high-pressure pump, a low-pressure circuit which is supplied through the use of a low-pressure pump, wherein the high-pressure pump and the low-pressure pump are driven by a common drive unit, and a valve which is provided downstream of the high-pressure pump. The valve has three switching positions, wherein a supply to the high-pressure circuit by the high-pressure pump is possible in the first switching position, and the output end of the high-pressure pump is connected to a reservoir or to the input end of the high-pressure pump in the second switching position. The high-pressure circuit is connected to the reservoir in the third switching position of the valve.