A cost optimized Dual Clutch Transmission (DCT) concept has been developed and previously published by BorgWarner. One unique aspect of this concept is that first gear is mounted on a one-way clutch (OWC), enabling the elimination of the synchronizer and related actuation components. While this power flow significantly reduces the cost and complexity of the transmission, it also presents some unique challenges for the control system. The control system has to work with and take advantage of the OWC's characteristic that causes the transmission gear to engage and disengage automatically. The OWC architecture provides advantages over the typical synchronizer controlled gear engagement in that shifts to first gear are virtually unnoticeable as all noise and driveline disturbances due to gear engagement are eliminated. This paper will explore the unique features of the DCT with a OWC. It discusses the advantages of the architecture as well as the challenges to the control strategies. Unique algorithms are employed to control shifting to/from the OWC gear. Overrun detection and a strategy to avoid harsh OWC engagement are required. Diagnostics and limp home strategies unique to the architecture are also discussed. Finally a case study is presented featuring the development of BorgWarner's DCT with OWC architecture.


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    Title :

    Control of dual clutch transmissions with one way clutch


    Contributors:


    Publication date :

    2013


    Size :

    12 Seiten, 9 Bilder, 1 Tabelle, 1 Quelle




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




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