Previous attempts at wedge clutches in automatic transmissions often failed because of unpleasant shift jerking.
Previous attempts at wedge clutches in automatic transmissions often failed because of unpleasant shift jerking.
4 PagesCUSTOMERS PAGE 36 Previous attempts at wedge clutches in auto- matic transmissions often failed because of unpleasant shift jerking. Researchers from Shanghai Jiao Tong University are working on solving this problem through a precisely controlled electric motor. The validation is based on hard- ware and software tools by dSPACE. T Figure 1: Force analysis on a simplifi ed depiction of the wedge clutch mechanism. Even a small actuating force F m can cause a very large normal force F n on the clutch plates, translating into a distinct jerk that would seriously affect ride comfort. A Challenging Transition The wedge mechanism is driven be- tween a rotating clutch plate and a fi xed counter bearing (fi gure 1). The further the electric motor drives the wedge, the tighter the
