Shift mechanism having a rotating drum

    Research output: Patent

    28 Downloads (Pure)


    A shift mechanism 100, for a twin clutch transmission system, comprises a plurality of shift rails 92, 94, 96, 98, which control synchromesh units of a multi-ratio gearbox, and a drum 102 that engages via an annular groove 110 with abutments 112 mounted on the shift rails. A gear may be selected by energizing electric motor 140 to move a control shaft 106 so that forked abutment means 122 is located centrally in axial slot 120. The drum 102 and control shaft 106 may than be rotated, via a pinion 132 and gear 134, by motor 130, until the abutment 122 is aligned axially with one of the abutment 112 on the shift rail associated with the gear to be engaged. Motor 140 may then be energized to move, via a leadscrew 142 and nut 144, the control shaft 106 in the appropriate axial direction to engage a gear.

    Original languageEnglish
    Patent numberGB2394261A
    IPCF16H 61/32
    Priority date19/10/02
    Filing date19/10/02
    Publication statusPublished - 21 Apr 2004

    ASJC Scopus subject areas

    • Automotive Engineering


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