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《Drive System Technique》 2009-02
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7-Speed Dual Clutch Transmission System for Sporty Applications

Dr.-Ing.Michael Ebenhoch,Dr.-Ing.Ralf Kubalczyk,ZF Getriebe GmbH,Kressbronn,Germany Dipl.-Ing.(FH) Hans-Jürgen Schneider,ZF Sachs AG,Schweinfurt,Germany  
With its 7-speed dual clutch transmission,ZF has introduced an innovative transmission for sporty applications.The close ratios combined with extremely spontaneous drive behavior makes it an ideal transmission for sporty applications.This article describes the compact gear set with lubrication by injection for improving the level of efficiency and increasing the engine-speed-strength,the dual clutch unit as well as the hydraulic control unit,which is based on the pre-control principle,are also described in detail.The hydraulic control principle provides the option of a hydraulic cruise mode in the event of an electronics failure.In addition to the transmission design,functional features that also highlight the sporty character of the transmission are described in detail.
【CateGory Index】: U463.212
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