Patent ID: 7395908

Claim:
A hydraulic system for providing pressures and volumetric flows in a dual clutch transmission, comprising: a first clutch a second clutch a first feed line providing a volumetric cooling flow for said first and second clutches; a second feed line providing a volumetric lubricating flow for said first and second clutches; at least one switching valve upstream of said first and second clutches, the switching valve having: a first inlet port connected to the first feed line, a second inlet port connected to the second feed line, a first outlet port connected to the first clutch, and a second outlet port connected to the second clutch; wherein said first and second feed lines are separated from each other; said switching valve is controlled for guiding in a controlled manner in a first position the lubricating flow onto the first clutch and the cooling flow onto the second clutch and in a second position the lubricating flow onto the second clutch and the cooling flow onto the first clutch.