Clutch engagement for a transmission when in park

A transmission includes a first hydraulic clutch, a second hydraulic clutch, a third hydraulic clutch, a pump and a controller. The first, second, and third hydraulic clutches are configured to established a parked-ready condition upon engagement of all three clutches. The pump is configured to gene...

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Bibliographische Detailangaben
Hauptverfasser: Suter Charles William, Sullivan Conor Edward, Cicala Stephen Michael, McDonnell Alexander Phillip, Dagci Oguz Hasan
Format: Patent
Sprache:eng
Schlagworte:
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Beschreibung
Zusammenfassung:A transmission includes a first hydraulic clutch, a second hydraulic clutch, a third hydraulic clutch, a pump and a controller. The first, second, and third hydraulic clutches are configured to established a parked-ready condition upon engagement of all three clutches. The pump is configured to generate hydraulic fluid pressure. The controller is programmed to, in response to a command to start an engine that powers the pump, engage the first and second clutches. The controller is further programmed to, in response to engagement of the first and second clutches and obtaining operating hydraulic fluid pressure, engage the third clutch.