A power transfer case (10) transfers drive torque from the input member to the output member. The power transfer case (10) includes a lubrication system (18), a hydraulically actuated friction clutch assembly (12), and a hydraulically actuated range shift assembly (14). An on-demand electric lube pump (16) can supply a fluid under pressure. An accumulator (20) is selectively supplied with fluid under pressure from the on-demand lube pump (16). A first valve (22) selectively directs fluid under pressure from the on-demand lube pump (16) to the lubrication system (18) when in a first position (22a) and to the accumulator (20) when in a second position (22b). A second valve (28) selectively directs fluid under pressure from the accumulator (20) to the range shift assembly (14) when in a first position (28a), to the friction clutch assembly when in a second position (28b), and isolates the accumulator (20) from the range shift assembly (14) and the friction clutch assembly (12) when in a third position (28c).


    Access

    Download


    Export, share and cite



    Title :

    HIGH EFFICIENCY HYDRAULIC TRANSFER CASE


    Contributors:

    Publication date :

    2016-02-04


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    F16D COUPLINGS FOR TRANSMITTING ROTATION , Nicht schaltbare Kupplungen / B60K Anordnung oder Einbau von Antriebseinheiten oder von Kraft- bzw. Drehmomentübertragungen in Fahrzeugen , ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES



    High efficiency hydraulic transfer case

    PRITCHARD LARRY A | European Patent Office | 2017

    Free access



    High Efficiency Hydraulic Power Transfer Units for Multisystem Aircraft

    BOEHRINGER, W.E. | Emerald Group Publishing | 1980


    Hydraulic mode-stable powertrain transfer case

    PRITCHARD LARRY A | European Patent Office | 2018

    Free access