We have developed a new automated manual transmission (AMT) system that improves gear shifting quality. This AMT can be constructed by adding a torque-assist mechanism that uses a wet clutch to the transmission case of an ordinary manual transmission. This torque-assist mechanism provides a bypass torque that prevents interruption of the wheels torque during shifting. We call this new transmission a torque-assist AMT.The first characteristic of the torque-assist AMT is to be able to shift gears smoothly, without interrupting the driving force. The second is the quick response of the shifting operation. The third is the AMT's compact structure, and the fourth is the low cost, because the torque-assist mechanism is simply attached to a manual transmission.We confirmed superior shifting characteristics by performing measurements on a prototype car that had a 1.2 L engine. Shifting without torque interruption was possible in up shift or down shift under acceleration conditions, and a rapid response was obtained in the kick down shift especially. The shifting principle, mechanism, actuators and experiments used to test the AMT are described in this paper.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Automated Manual Transmission with Torque Assist Mechanism for Reducing Shift Shock


    Additional title:

    Sae Technical Papers


    Contributors:

    Conference:

    SAE 2005 World Congress & Exhibition ; 2005



    Publication date :

    2005-04-11




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




    Automated manual transmission with torque assist mechanism for reducing shift shock

    Yamasaki,M. / Konno,H. / Kuroiwa,H. et al. | Automotive engineering | 2005


    2005-01-1783 Automated Manual Transmission with Torque Assist Mechanism for Reducing Shift Shock

    Yamasaki, M. / Konno, H. / Kuroiwa, H. et al. | British Library Conference Proceedings | 2005


    Torque assist system and automated manual transmission utilizing the same

    CHOI MIN SIK / PARK JAE SIK / SHIN JAE WOON | European Patent Office | 2016

    Free access

    Automated manual transmission with dynamic torque transfer device

    LI DONGXU | European Patent Office | 2016

    Free access

    A Gear-Shift Simulator for Evaluating Gear-Shift Quality of a Torque-Assisted Automated Manual Transmission

    Yamasaki, M. / Tokuo, K. / Kuroiwa, H. et al. | British Library Conference Proceedings | 2001