TRANSMISSION

A multi-ratio automatic transmission (10) for a vehicle, the transmission (10) having at least one planetary gear set (16, 18), a plurality of friction elements (C1, C2, C3, B1, B2) for coupling components of the planetary gear set (16, 18) between an input and an output of the transmission in diffe...

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Bibliographische Detailangaben
Hauptverfasser: FIRTH DARREN LEE, DONNELLY PAUL ANTHONY, KRUPIC ROBERT, TAPPER STEPHEN, LIU KENT JIAN, SMITH SIMON, BAUER FRANK, PRIZMIC SANDI, QIU LING, TAMBA RICHARD TERRENCE, MOREY JOHN
Format: Patent
Sprache:eng
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Zusammenfassung:A multi-ratio automatic transmission (10) for a vehicle, the transmission (10) having at least one planetary gear set (16, 18), a plurality of friction elements (C1, C2, C3, B1, B2) for coupling components of the planetary gear set (16, 18) between an input and an output of the transmission in different configurations so as to achieve a plurality of drive ratios, and a control system (26) for selectively engaging/disengaging the friction elements (C1, C2, C3, B1, B2) in different combinations to effect selection of the ratios, wherein rate of engagement and/or disengagement of one or more of the friction elements (C1, C2, C3, B1, B2) is controlled independently of the or each of the other friction element(s) (C1, C2, C3, B1, B2).