A multi-pressure hydraulic control system (66) for use with a step-gear automatic transmission (14) of a vehicle powertrain system (10) includes at least one pump (28) having a rotatable pump member (34), at least one inlet region (40) for receiving fluid to be pumped by the pump member (34), and at least one outlet region (42) for outputting fluid pumped by the pump member (34), and a switching valve (78) receiving at least three separate outputs of fluid pumped by the at least one pump (28) for allowing the at least three separate outputs to be selectively combined and/or separated, the switching valve (78) having a valve member (79) being movable between at least three positions that produces fluid outputs having a high fluid pressure, a medium fluid pressure, and a low fluid pressure to one or more portions of the stepgear automatic transmission (14).


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    Titel :

    MULTI-PRESSURE HYDRAULIC CONTROL SYSTEM FOR A STEP-GEAR AUTOMATIC TRANSMISSION


    Beteiligte:

    Erscheinungsdatum :

    2018-03-29


    Medientyp :

    Patent


    Format :

    Elektronische Ressource


    Sprache :

    Englisch


    Klassifikation :

    IPC:    F16H Getriebe , GEARING / B60K Anordnung oder Einbau von Antriebseinheiten oder von Kraft- bzw. Drehmomentübertragungen in Fahrzeugen , ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES



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