Friction Launch transmissions use a wet multi-plate clutch to replace the torque converter in an automatic transmission. The main benefit of this technology is fuel economy improvement as a result of eliminating the losses in the torque converter. By using one of the range clutches inside the transmission instead of an input clutch in place of the converter, the benefits of this integrated friction launch technology, such as reduction in mass, packaging, and cost, can be enhanced. The availability of new automatic transmissions with higher number of speeds and wider overall ratio spreads makes this technology more viable than ever before. This project focuses on control issues with the friction launch clutch which include developing robust control algorithms for launch and creep, and providing damping to the driveline, when required, and ensuring acceptable vehicle drivability. This paper describes in detail the development of vehicle launch control algorithms. Vehicle test data is presented to show that the control strategy developed in this project significantly reduces the gap between the drivability of a starting clutch vehicle and a torque converter equipped vehicle.


    Access

    Access via TIB

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Control of a friction launch automatic transmission using a range clutch


    Additional title:

    Die Steuerung eines Reibungsstartautomatik-Getriebes mit einer Bereichskupplung


    Contributors:


    Publication date :

    2006


    Size :

    7 Seiten, 7 Quellen



    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




    Smooth Launch Control of an Integrated Friction Launch Automatic Transmission

    Phillips, A. | British Library Conference Proceedings | 2006


    Putting Automatic Transmission Clutch Friction Researchers on Speaking Terms

    Smith, G. R. / Silbert, P. L. / Herndon, W. B. et al. | SAE Technical Papers | 1967


    Dual Clutch Automatic Transmission Two Clutch Starting Control and Simulation

    Jia, Guo Zhong ;Wu, Xin Ping ;Jia, Zhen Hua | Trans Tech Publications | 2013



    MODELING AND SIMULATION OF FRICTION DISC CLUTCH OPERATION IN AUTOMATIC TRANSMISSION

    Sustersic, V. / Babic, M. / Jovicic, N. et al. | British Library Conference Proceedings | 2004