Transmission clutch control

A transmission includes at least one shift element for which both the apply pressure and the release pressure are actively controlled. A controller adjusts the torque capacity of the shift element by varying the apply pressure and the release pressure in a coordinated fashion. During particular even...

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Bibliographische Detailangaben
Hauptverfasser: Meehan, Kimberly Ann, Venegas, Diego Campos, Kucharski, Joseph F, Heuver, Bradley Ronald
Format: Patent
Sprache:eng
Schlagworte:
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Beschreibung
Zusammenfassung:A transmission includes at least one shift element for which both the apply pressure and the release pressure are actively controlled. A controller adjusts the torque capacity of the shift element by varying the apply pressure and the release pressure in a coordinated fashion. During particular events, such as a shift event with the shift element as oncoming element or holding element, both the apply pressure and the release pressure are monotonically increased, mitigating the effect of hysteresis.