Power transmission with two simple planetary gearsets

Details Power transmission with two simple planetary gearsets Power transmission with two simple planetary gearsets

Filed on

1998-08-31

Date issued

1999-11-16

Examiner

Wright, Dirk

Patent Class

Planetary gear transmission systems or components

SubClass

With means to vary drive ratio or disconnect drive

SubSubClass

Plural elements selectively braked

Other Related Categories

475271, 475284, F16H 344

Type

Patent

Status

active

Patent number

059848251

Description

ABSTRACT:
A planetary gear arrangement has two simple planetary gearsets and six selectively engageable friction torque transmitting mechanisms which are controlled to establish five forward transmission ratios and one reverse transmission ratio. One of the planetary gearsets establishes one forward ratio and the reverse ratio. The two planetary gearsets are compounded through both a continuous torque transmitting connection and a selectively engageable drive connection comprised of one of the torque transmitting mechanism during the two lowest forward transmission ratios and through the continuous torque transmitting connection during the highest of the forward transmission ratios. Both planetary gearsets are maintained in a direct drive ratio during the numerically central (third) forward ratio.

REFERENCES:
patent: 5194055 (1993-03-01), Oshidari
patent: 5383822 (1995-01-01), Pierce
patent: 5577976 (1996-11-01), Haka
patent: 5692988 (1997-12-01), Beim et al.
patent: 5833568 (1998-11-01), Park
patent: 5836850 (1998-11-01), Raghavan et al.
patent: 5879264 (1999-03-01), Raghavan et al.

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