Automatic transmission having C.V.T. system for a vehicle

Details Automatic transmission having C.V.T. system for a vehicle Automatic transmission having C.V.T. system for a vehicle

1986-06-19

1987-11-17

Braun, Leslie

Machine element or mechanism

Elements

Gear casings

74695, 74701, 74740, 74760, 74765, F16H 3708

Patent

active

047065184

ABSTRACT:
An automatic transmission for a front-engine front-drive vehicle comprising a fluid coupling, a belt type continuously-variable speed transmission (C.V.T.), a planetary gear mechanism, a forward-reverse changeover mechanism and a differential device. The planetary gear mechanism includes first and second planetary gear sets, a first intermediate shaft connected to a ring gear of the first planetary gear set and a sun gear of the second planetary gear set, a second intermediate shaft connected to a planetary carrier of the first planetary gear set and a ring gear of the second planetary gear set, and an input shaft connected to an output C.V.T. The forward-reverse changeover mechanism includes a brake disposed between the output of the C.V.T. and the planetary gear sets, and when the first intermediate shaft is braked, the ring gear of the first planetary gear set and the sun gear of the second planetary gear set are held in a stationary position by the brake, thereby a forward range gear train is formed, whereas when the second intermediate shaft is braked, the planetary carrier of the first planetary gear set and the ring gear of the second planetary gear set are held in a stationary position by the brake, thereby forming a reverse gear train.

REFERENCES:
patent: 3128636 (1964-04-01), Graybill
patent: 4328717 (1982-05-01), Arai
patent: 4329888 (1982-05-01), Falzoni
patent: 4353270 (1982-10-01), Falzoni
patent: 4392394 (1983-07-01), Hofbauer et al.
patent: 4627308 (1986-12-01), Moroto et al.

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