TRANSMISSION AND METHOD OF ENGAGEMENT

The present invention discloses a transmission and a method of engagement. While a transmission range selector is in a Park position, a controller engages multiple transmission shift elements to place the transmission in a tie-up state. In the tie-up state, both the transmission output shaft and the...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: RIES SCOTT PATRICK, MORRISON KENDRICK
Format: Patent
Sprache:eng
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Beschreibung
Zusammenfassung:The present invention discloses a transmission and a method of engagement. While a transmission range selector is in a Park position, a controller engages multiple transmission shift elements to place the transmission in a tie-up state. In the tie-up state, both the transmission output shaft and the turbine shaft are held against rotation by the shift elements. To transition from Park to Drive, the controller releases one of the shift elements to place the transmission in a 1st gear state. To transition from Park to Reverse, the controller releases a different one of the shift elements to place the transmission in a reverse state. The controller may wait until the driver releases the brake pedal to release the shift element.