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US 7,401,689 B2Granted
Hydraulic system providing pressure and volume flows in a double-clutch transmission
AssigneeGetrag Ford Transmissions GmbH
InventorsAndreas Hegerath, Martin Leibbrandt, Reinhard Moehlmann, Ulrich Eggert
Life of this patent
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Abstract
A hydraulic system for providing pressure and volume flows in a double-clutch transmission. A first clutch and a second clutch are preceded by at least one changeover valve which, in a first state, guides lubricating flow to the first clutch and cooling flow to the second clutch, and, in a second state, guides lubricating flow to the second clutch and cooling flow to the first clutch. The cooling flow is preferably variable.
Claims13
A hydraulic system for supplying fluid flow in a double-clutch transmission comprising:
- a first clutch;
- a second clutch;
- a first fluid source;
- a second fluid source;
- a changeover valve communicating with the first and second fluid sources and the first and second clutches, having a first state wherein the first fluid source is directed to the first clutch and the second fluid source is directed to the second clutch, and a second state wherein the first fluid source is directed to the second clutch and the second fluid source is directed to the first clutch.
2 more elements
Dependencies are inferred from the claim text.