Toyota developed a new hybrid unit “L4A0” for the new Tundra, which creates both good drivability and environmental performance. To ensure off-road, towing performance and typical truck driving characteristics, the unit is based on a transmission with a torque converter and a multi-plate lock up clutch, with a motor-generator and K0 clutch installed between the engine and transmission. The motor-generator and K0 clutch are built into a module, making it possible to create new hybrid units by combining the module with various transmissions. The unit features many different motor controls. For example, in the case of step-in acceleration input, in order to achieve the desired output torque, typically a kick-down shift is necessary [1]; however, by utilizing “L4A0” both high response and high power output is achieved even without a kick-down shift. This is accomplished by assisting the engine with the motor-generator even when the engine torque is delayed at low engine speeds. Simultaneously, this contributed to better fuel economy by allowing the engine to work at optimum speeds [1-3]. Another feature is the high-response and shock-less engine start that is achieved by cranking the engine with the motor-generator via the K0 clutch.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Toyota’s New Hybrid Unit “L4A0”


    Additional title:

    Sae Technical Papers


    Contributors:

    Conference:

    WCX SAE World Congress Experience ; 2022



    Publication date :

    2022-03-29




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




    Toyota’s New Hybrid Unit “L4A0”

    Tan, Guodong / Ikemura, Masashi / Hasegawa, Yoshio et al. | British Library Conference Proceedings | 2022


    Toyota’s New Hybrid Unit “L4A0”

    Tan, Guodong / Ikemura, Masashi / Hasegawa, Yoshio et al. | British Library Conference Proceedings | 2022



    Development of Toyota's Hybrid Brake System

    Soga, M. / Obuchi, Y. / Sakai, A. et al. | British Library Conference Proceedings | 2005